HEALTHEON CORP
S-1/A, 1998-09-09
COMPUTER PROCESSING & DATA PREPARATION
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<PAGE>
   
   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON SEPTEMBER 9, 1998
    
 
   
                                                      REGISTRATION NO. 333-60427
    
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                       SECURITIES AND EXCHANGE COMMISSION
 
                             WASHINGTON, D.C. 20549
                             ---------------------
 
   
                                AMENDMENT NO. 1
                                       TO
                                    FORM S-1
    
 
                             REGISTRATION STATEMENT
 
                                     UNDER
 
                           THE SECURITIES ACT OF 1933
                              -------------------
 
                             HEALTHEON CORPORATION
             (Exact name of Registrant as specified in its charter)
 
<TABLE>
<S>                                 <C>                                 <C>
             DELAWARE                              7374                             94-3236644
 (State or other jurisdiction of       (Primary Standard Industrial              (I.R.S. Employer
  incorporation or organization)       Classification Code Number)            Identification Number)
</TABLE>
 
                            4600 PATRICK HENRY DRIVE
                             SANTA CLARA, CA 95054
                                 (408) 876-5000
         (Address, including zip code, and telephone number, including
            area code, of Registrant's principal executive offices)
                             ---------------------
                                W. MICHAEL LONG
                            CHIEF EXECUTIVE OFFICER
                            4600 PATRICK HENRY DRIVE
                             SANTA CLARA, CA 95054
                                 (408) 876-5000
           (Name, address, including zip code, and telephone number,
                   including area code, of agent for service)
                             ---------------------
                                   COPIES TO:
 
<TABLE>
<S>                                 <C>                                 <C>
         LARRY W. SONSINI                     JACK DENNISON                     GORDON K. DAVIDSON
        STEVEN E. BOCHNER                   VICE PRESIDENT AND                 LAIRD H. SIMONS III
         MARK L. REINSTRA                    GENERAL COUNSEL                    JEFFREY R. VETTER
 Wilson Sonsini Goodrich & Rosati        4600 Patrick Henry Drive               MICHAEL J. MCADAM
     Professional Corporation             Santa Clara, CA 95054                 Fenwick & West LLP
        650 Page Mill Road                    (408) 876-5000                   Two Palo Alto Square
     Palo Alto, CA 94304-1050                                                  Palo Alto, CA 94306
          (650) 493-9300                                                          (650) 494-0600
</TABLE>
 
                             ---------------------
        APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC:
AS SOON AS PRACTICABLE AFTER THE EFFECTIVE DATE OF THIS REGISTRATION STATEMENT.
                             ---------------------
 
    If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, check the following box: / /
    If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering: / /
- ----------
    If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering: / /
- ----------
    If this Form is a post-effective amendment filed pursuant to Rule 462(d)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering: / /
- ----------
   
    If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box: / /
    
                             ---------------------
 
    THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF
THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(A),
MAY DETERMINE.
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
                                    PART II
                     INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 13.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION
 
    The following table sets forth the costs and expenses, other than
underwriting discounts and commissions, payable by the Registrant in connection
with the sale of Common Stock being registered. All amounts are estimates except
the Securities and Exchange Commission registration fee, the NASD filing fee and
the Nasdaq National Market listing fee.
 
<TABLE>
<CAPTION>
                                                                                    AMOUNT
                                                                                  TO BE PAID
                                                                                 -------------
<S>                                                                              <C>
Securities and Exchange Commission registration fee............................   $    22,125
NASD filing fee................................................................         8,000
Nasdaq National Market listing fee.............................................        50,000
Printing and engraving expenses................................................             *
Legal fees and expenses........................................................             *
Accounting fees and expenses...................................................             *
Blue Sky fees and expenses.....................................................             *
Transfer agent fees............................................................             *
Miscellaneous..................................................................             *
                                                                                 -------------
    Total......................................................................   $         *
                                                                                 -------------
                                                                                 -------------
</TABLE>
 
- ---------
 
*   To be provided by amendment.
 
ITEM 14.  INDEMNIFICATION OF DIRECTORS AND OFFICERS
 
    Section 145 of the Delaware General Corporation Law permits a corporation to
include in its charter documents, and in agreements between the corporation and
its directors and officers, provisions expanding the scope of indemnification
beyond that specifically provided by the current law.
 
    Article V of the Registrant's Restated Certificate of Incorporation provides
for the indemnification of directors to the fullest extent permissible under
Delaware law.
 
    Article VI of the Registrant's Bylaws provides for the indemnification of
officers and directors (and allows the Registrant to indemnify other employees
and third parties) acting on behalf of the Registrant if such person acted in
good faith and in a manner reasonably believed to be in and not opposed to the
best interest of the Registrant, and, with respect to any criminal action or
proceeding, the indemnified party had no reason to believe his or her conduct
was unlawful.
 
    The Registrant intends to enter into indemnification agreements with its
directors and executive officers, in addition to indemnification provided for in
the Registrant's Bylaws, and intends to enter into indemnification agreements
with any new directors and executive officers in the future.
 
    The Registrant intends to obtain directors' and officers' insurance
providing indemnification for certain of the Registrant's directors, officers
and employees for certain liabilities.
 
    Reference is also made to Section 7 of the Underwriting Agreement to be
filed as Exhibit 1.1 to the Registration Statement for information concerning
the Underwriters' obligation to indemnify the Registrant and its officers and
directors in certain circumstances.
 
                                      II-1
<PAGE>
ITEM 15.  RECENT SALES OF UNREGISTERED SECURITIES
 
    (a) Since its founding in December 1995, through July 31, 1998, the
Registrant has issued and sold the following unregistered securities:
 
        (1) On January 26, 1996, the Registrant sold 10,305,000 shares of Series
    A Preferred Stock to 22 investors at a purchase price of $.50 per share,
    which was paid in cash.
 
        (2) On January 26, 1996, the Registrant sold 1,000,000 shares of Common
    Stock to four investors at a purchase price of $.05 per share, which was
    paid in cash.
 
        (3) On July 8, 1996, the Registrant sold 10,000 shares of Series A
    Preferred Stock to a vendor in consideration for services rendered.
 
        (4) On October 1, 1996, the Registrant sold 3,000,000 shares of Series B
    Preferred Stock to five investors at a purchase price of $2.00 per share,
    which was paid in cash.
 
        (5) On November 1, 1996, the Registrant issued warrants to purchase
    2,000,000 shares of Series B Preferred Stock with an exercise price of $2.00
    per share to two entities, in consideration of services rendered and as an
    incentive to continue to provide services.
 
        (6) On July 1, 1997, the Registrant issued warrants to purchase a total
    of 61,947 shares of Series B Preferred Stock with an exercise price of $2.00
    per share to three entities pursuant to a bridge loan financing.
 
        (7) Between July 1 and July 27, 1997, the Registrant sold an aggregate
    of 2,600,000 shares of Series C Preferred Stock to nine investors at a
    purchase price of $2.50 per share, in consideration of cash and cancellation
    of indebtedness incurred in connection with a bridge loan financing.
 
        (8) Between July 7 and July 16, 1997, the Registrant sold 25,000 shares
    of Series B Preferred Stock to one entity at a purchase price of $2.00 per
    share, in consideration of services rendered.
 
        (9) On July 11, 1997, the Registrant sold 10,000 shares of Series A
    Preferred Stock to the same vendor referred to in (3) above in consideration
    of services rendered.
 
       (10) On July 11, 1997, the Registrant sold 250,000 shares of Series B
    Preferred Stock to an officer at a purchase price of $2.00 per share, paid
    with an amount of cash equal to the par value of the purchased shares and
    with a promissory note which has subsequently been paid in full.
 
       (11) On July 11, 1997, the Registrant issued a warrant to purchase
    750,000 shares of Series B Preferred Stock with an exercise price of $2.00
    per share to an officer as an incentive to continue to provide services.
 
       (12) On July 22, 1997, the Registrant sold 15,000 shares of Series B
    Preferred Stock to one investor at a purchase price of $2.00 per share,
    which was paid in cash.
 
       (13) From October 17 through December 19, 1997, the Registrant sold an
    aggregate of 4,807,692 shares of Series D Preferred Stock to 13 investors at
    a purchase price of $5.20 per share, which was paid in cash.
 
       (14) On May 1, 1998, the Registrant sold 1,017,229 shares of Series B
    Preferred Stock to one investor upon the exercise of warrants with an
    exercise price of $2.00 per share which was paid in cash.
 
       (15) On May 19, 1998, 22,019,921 shares of the Registrant's Preferred
    Stock of the Company were converted into Common Stock on a one-for-one
    basis, in connection with the ActaMed acquisition.
 
                                      II-2
<PAGE>
       (16) On May 19, 1998, in connection with the ActaMed acquisition, the
    Registrant assumed options to purchase ActaMed Common Stock which were held
    by former ActaMed employees which are now exercisable for an aggregate of
    3,497,007 shares of Registrant's Common Stock.
 
       (17) On May 19, 1998, the Registrant issued 23,271,353 shares of its
    Common Stock to former shareholders of ActaMed in connection with the
    acquisition of ActaMed Corporation ("ActaMed") in exchange for all of the
    issued and outstanding shares of capital stock of ActaMed.
 
       (18) On May 19, 1998, in connection with the acquisition of ActaMed, the
    Registrant assumed a warrant to purchase shares of ActaMed capital stock
    which are now exercisable for an aggregate of 282,533 shares of Healtheon
    Common Stock.
 
       (19) On June 26, 1998, the Registrant sold 1,336,209 shares of Common
    Stock to one entity in consideration for certain assets and licenses
    relating to SmithKline Labs.
 
       (20) Since January 1996, the Registrant has granted 11,611,084 options to
    purchase shares of Registrant's Common Stock to employees pursuant to the
    Company's 1996 Stock Plan.
 
       (21) From July 6, 1996 through July 17, 1998, the Company issued an
    aggregate of 4,739,920 shares of Common Stock for aggregate consideration,
    in the form of cash and promissory notes, of $1.1 million.
 
    (b) There were no underwriters, brokers or finders employed in connection
with any of the transactions set forth above.
 
    (c) The transactions referred to in numbers 16-18 were exempt from
registration pursuant to the provisions of Section 3(a)(10) of the Securities
Act. The sales of the above securities were deemed to be exempt from
registration under the Securities Act in reliance on Section 4(2) of the
Securities Act, or Regulation D promulgated thereunder, or, with respect to
issuances to employees, Rule 701 promulgated under Section 3(b) of the
Securities Act as transactions by an issuer not involving a public offering or
transactions pursuant to compensatory benefit plans and contracts relating to
compensation as provided under such Rule 701. The recipients of securities in
each such transaction represented their intentions to acquire the securities for
investment only and not with a view to or for sale in connection with any
distribution thereof and appropriate legends were affixed to the instruments
representing such securities issued in such transactions. All recipients had
adequate access, through their relationships with the Company, to information
about the Registrant.
 
ITEM 16.  EXHIBITS AND FINANCIAL STATEMENT SCHEDULES
 
    (a) EXHIBITS
 
   
<TABLE>
<S>        <C>
1.1*       Form of Underwriting Agreement.
2.0**      Agreement and Plan of Reorganization, dated as of February 24, 1998, by and
             among the Registrant, MedNet Acquisition Corp. and ActaMed Corporation.
2.1        Agreement and Plan of Merger, dated as of March 1, 1996, by and among
             ActaMed Corporation, EDI Acquisition, Inc., UHC Green Acquisition, Inc.
             and United HealthCare Corporation.
3.1**      Amended and Restated Certificate of Incorporation of the Registrant, as
             currently in effect.
3.2**      Form of Amended and Restated Certificate of Incorporation, to be filed
             prior to the closing of the offering made under this Registration
             Statement.
3.3**      Bylaws of the Registrant, as currently in effect.
3.4**      Form of Bylaws of the Registrant, to be adopted prior to the closing of the
             offering made under this Registration Statement.
</TABLE>
    
 
                                      II-3
<PAGE>
   
<TABLE>
<S>        <C>
4.1*       Specimen Common Stock certificate.
5.1*       Form of Opinion of Wilson Sonsini Goodrich & Rosati, Professional
             Corporation, regarding the legality of the securities being issued.
10.1       Form of Indemnification Agreement entered into by the Registrant with each
             of its directors and executive officers.
10.2       1996 Stock Plan and form of Stock Option Agreement thereunder.
10.3**     ActaMed Corp. 1997 Stock Option Plan
10.4**     ActaMed Corp. 1996 Stock Option Plan
10.5**     ActaMed Corp. 1995 Stock Option Plan
10.6**     ActaMed Corp. 1994 Stock Option Plan.
10.7**     ActaMed Corp. 1993 Class B Common Stock Option Plan.
10.8**     ActaMed Corp. 1992 Stock Option Plan.
10.9**     ActaMed Corp. 1996 Director Stock Option Plan, as amended.
10.10**    Amended and Restated Investors' Rights Agreement dated as of May 19, 1998
             among the Registrant and certain of the Registrant's securityholders.
10.11**    Lease Agreement, dated December 2, 1997, between Larvan Properties and
             Registrant.
10.12**    Lease Agreement, dated November 6, 1995, as amended, between ActaMed
             Corporation and ZML-Central Park, L.L.C.
10.13+     Services and License Agreement, dated as of April 4, 1996, between ActaMed
             Corporation and United HealthCare Corporation.
10.14+     Services Agreement, dated as of December 31, 1997, as amended, between
             ActaMed Corporation and SmithKline Beecham Clinical Laboratories, Inc.
10.15+     Assets Purchase Agreement, dated as of December 31, 1997, as amended,
             between ActaMed Corporation and SmithKline Beecham Clinical Laboratories,
             Inc.
10.16+     License Agreement, dated as of December 31, 1997, between ActaMed
             Corporation and SmithKline Beecham Clinical Laboratories, Inc.
10.17+     Development Agreement, dated as of October 31, 1997, between ActaMed
             Corporation and SmithKline Beecham Clinical Laboratories, Inc.
10.18+     Services, Development and License Agreement, dated as of December 15, 1997,
             between the Registrant and Beech Street Corporation.
10.19+     Services, Development and License Agreement, dated as of September 30,
             1997, between the Registrant and Brown & Toland Physician Services
             Organization.
10.20**    Amended and Restated Securities Purchase Agreement, dated as of January 26,
             1996, between the Registrant and investors.
10.21**    Amended and Restated Series B Preferred Stock Purchase Agreement dated
             October 31, 1996, between Registrant and investors.
10.22**    Form of Series B Preferred Stock Purchase Warrant between the Registrant
             and certain of the Registrant's investors.
10.23**    Series C Preferred Stock Purchase Agreement dated July 25, 1997, between
             the Registrant and investors.
10.24**    Series D Preferred Stock Purchase Agreement dated October 13, 1997, between
             the Registrant and investors.
10.25**    Full Recourse Promissory Note dated as of July 11, 1997, between the
             Registrant and W. Michael Long.
10.26**    Form of Promissory Note for Bridge Financing
</TABLE>
    
 
   
                                      II-4
    
<PAGE>
   
<TABLE>
<S>        <C>
10.27      W. Michael Long Employment Agreement
10.28      Michael Hoover Employment Agreement
21.1**     Subsidiaries of the Registrant.
23.1*      Consent of Wilson Sonsini Goodrich & Rosati, Professional Corporation
             (included in Exhibit 5.1).
23.2**     Consent of Ernst & Young LLP, independent auditors (see page II-7).
23.3**     Consent of Deloitte & Touche LLP, independent auditors (see page II-8).
23.4**     Consent of Deloitte & Touche LLP, independent auditors (see page II-9).
24.1**     Power of Attorney (see page II-6).
27.1**     Financial Data Schedule.
</TABLE>
    
 
- ---------
 
*   To be supplied by amendment.
 
   
**  Previously filed.
    
 
+   Confidential treatment requested as to portions of this exhibit.
 
    (b) FINANCIAL STATEMENT SCHEDULES
 
    All schedules have been omitted because the information required to be set
forth therein is not applicable or is shown in the financial statements or notes
thereto.
 
ITEM 17.  UNDERTAKINGS
 
    (a) The undersigned hereby undertakes to provide to the Underwriters at the
closing specified in the Underwriting Agreement certificates in such
denominations and registered in such names as required by the Underwriters to
permit prompt delivery to each purchaser.
 
    (b) Insofar as indemnification for liabilities arising under the Securities
Act of 1933 may be permitted to directors, officers and controlling persons of
the Registrant pursuant to the provisions referenced in Item 14 of this
Registration Statement or otherwise, the Registrant has been advised that in the
opinion of the Securities and Exchange Commission such indemnification is
against public policy as expressed in the Act, and is, therefore, unenforceable.
In the event that a claim for indemnification against such liabilities (other
than the payment by the Registrant of expenses incurred or paid by a director,
officer or controlling person of the Registrant in the successful defense of any
action, suit or proceeding) is asserted by such director, officer or controlling
person in connection with the securities being registered hereunder, the
Registrant will, unless in the opinion of its counsel the matter has been
settled by controlling precedent, submit to a court of appropriate jurisdiction
the question whether such indemnification by it is against public policy as
expressed in the Act and will be governed by the final adjudication of such
issue.
 
    (c) The undersigned Registrant hereby undertakes that:
 
        (1) For purposes of determining any liability under the Act, the
    information omitted from the form of Prospectus filed as part of this
    Registration Statement in reliance upon Rule 430A and contained in a form of
    Prospectus filed by the Registrant pursuant to Rule 424(b)(1) or (4) or
    497(h) under the Act shall be deemed to be part of this Registration
    Statement as of the time it was declared effective.
 
        (2) For the purpose of determining any liability under the Act, each
    post-effective amendment that contains a form of Prospectus shall be deemed
    to be a new Registration Statement relating to the securities offered
    therein, and the offering of such securities at that time shall be deemed to
    be the initial BONA FIDE offering thereof.
 
                                      II-5
<PAGE>
                                   SIGNATURES
 
   
    Pursuant to the requirements of the Securities Act of 1933, as amended, the
Registrant has duly caused this Registration Statement on Form S-1 to be signed
on its behalf by the undersigned, thereunto duly authorized, in the City of
Santa Clara, State of California, on this 9th day of September, 1998.
    
 
   
<TABLE>
<S>                             <C>  <C>
                                HEALTHEON CORPORATION
 
                                By:          /s/ JOHN L. WESTERMANN III
                                     -----------------------------------------
                                               John L. Westermann III
                                              CHIEF FINANCIAL OFFICER
</TABLE>
    
 
   
    PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THIS
REGISTRATION STATEMENT HAS BEEN SIGNED BY THE FOLLOWING PERSONS IN THE
CAPACITIES AND ON THE DATES INDICATED.
    
 
   
<TABLE>
<CAPTION>
          SIGNATURE                       TITLE                    DATE
- ------------------------------  --------------------------  -------------------
<C>                             <S>                         <C>
     /s/ W. MICHAEL LONG*       Chief Executive Officer
- ------------------------------    and Director (Principal    September 9, 1998
       W. Michael Long            Executive Officer)
 
  /s/ JOHN L. WESTERMANN III    Chief Financial Officer
- ------------------------------    (Principal Financial and   September 9, 1998
    John L. Westermann III        Accounting Officer)
 
- ------------------------------  Chairman of the Board        September 9, 1998
         James Clark
 
      /s/ L. JOHN DOERR*
- ------------------------------  Director                     September 9, 1998
        L. John Doerr
 
     /s/ MICHAEL HOOVER*
- ------------------------------  President and Director       September 9, 1998
        Michael Hoover
 
   /s/ C. RICHARD KRAMLICH*
- ------------------------------  Director                     September 9, 1998
     C. Richard Kramlich
 
  /s/ WILLIAM MCGUIRE, M.D.*
- ------------------------------  Director                     September 9, 1998
    William McGuire, M.D.
 
      /s/ P. E. SADLER*
- ------------------------------  Director                     September 9, 1998
         P. E. Sadler
 
     /s/ TADATAKA YAMADA*
- ------------------------------  Director                     September 9, 1998
       Tadataka Yamada
</TABLE>
    
 
   
<TABLE>
<S>        <C>                                   <C>                                      <C>
*By:            /s/ JOHN L. WESTERMANN III                  /s/ JACK DENNISON
           ------------------------------------  --------------------------------------
                  John L. Westermann III                      Jack Dennison
                     ATTORNEY-IN-FACT                       ATTORNEY-IN-FACT
</TABLE>
    
 
                                      II-6
<PAGE>
                                 EXHIBIT INDEX
 
   
<TABLE>
<CAPTION>
 EXHIBIT                                                                                                SEQUENTIAL
 NUMBER                                            DESCRIPTION                                          PAGE NUMBER
- ---------  -------------------------------------------------------------------------------------------  -----------
<S>        <C>                                                                                          <C>
1.1*       Form of Underwriting Agreement.
 
2.0**      Agreement and Plan of Reorganization, dated as of February 24, 1998, by and among the
             Registrant, MedNet Acquisition Corp. and ActaMed Corporation.
 
2.1        Agreement and Plan of Merger, dated as of March 1, 1996, by and among ActaMed Corporation,
             EDI Acquisition, Inc., UHC Green Acquisition, Inc. and United HealthCare Corporation.
 
3.1**      Amended and Restated Certificate of Incorporation of the Registrant, as currently in
             effect.
 
3.2**      Form of Amended and Restated Certificate of Incorporation, to be filed prior to the closing
             of the offering made under this Registration Statement.
 
3.3**      Bylaws of the Registrant, as currently in effect.
 
3.4**      Form of Bylaws of the Registrant, to be adopted prior to the closing of the offering made
             under this Registration Statement.
 
4.1*       Specimen Common Stock certificate.
 
5.1*       Form of Opinion of Wilson Sonsini Goodrich & Rosati, Professional Corporation, regarding
             the legality of the securities being issued.
 
10.1       Form of Indemnification Agreement entered into by the Registrant with each of its directors
             and executive officers.
 
10.2       1996 Stock Plan and form of Stock Option Agreement thereunder.
 
10.3**     ActaMed Corp. 1997 Stock Option Plan
 
10.4**     ActaMed Corp. 1996 Stock Option Plan
 
10.5**     ActaMed Corp. 1995 Stock Option Plan
 
10.6**     ActaMed Corp. 1994 Stock Option Plan.
 
10.7**     ActaMed Corp. 1993 Class B Common Stock Option Plan.
 
10.8**     ActaMed Corp. 1992 Stock Option Plan.
 
10.9**     ActaMed Corp. 1996 Director Stock Option Plan, as amended.
 
10.10**    Amended and Restated Investors' Rights Agreement dated as of May 19, 1998 among the
             Registrant and certain of the Registrant's securityholders.
 
10.11**    Lease Agreement, dated December 2, 1997, between Larvan Properties and Registrant.
 
10.12**    Lease Agreement, dated November 6, 1995, as amended, between ActaMed Corporation and
             ZML-Central Park, L.L.C.
 
10.13+     Services and License Agreement, dated as of April 4, 1996, between ActaMed Corporation and
             United HealthCare Corporation.
 
10.14+     Services Agreement, dated as of December 31, 1997, as amended, between ActaMed Corporation
             and SmithKline Beecham Clinical Laboratories, Inc.
 
10.15+     Assets Purchase Agreement, dated as of December 31, 1997, as amended, between ActaMed
             Corporation and SmithKline Beecham Clinical Laboratories, Inc.
 
10.16+     License Agreement, dated as of December 31, 1997, between ActaMed Corporation and
             SmithKline Beecham Clinical Laboratories, Inc.
 
10.17+     Development Agreement, dated as of October 31, 1997, between ActaMed Corporation and
             SmithKline Beecham Clinical Laboratories, Inc.
</TABLE>
    
<PAGE>
   
<TABLE>
<CAPTION>
 EXHIBIT                                                                                                SEQUENTIAL
 NUMBER                                            DESCRIPTION                                          PAGE NUMBER
- ---------  -------------------------------------------------------------------------------------------  -----------
<S>        <C>                                                                                          <C>
10.18+     Services, Development and License Agreement, dated as of December 15, 1997, between the
             Registrant and Beech Street Corporation.
 
10.19+     Services, Development and License Agreement, dated as of September 30, 1997, between the
             Registrant and Brown & Toland Physician Services Organization.
 
10.20**    Amended and Restated Securities Purchase Agreement, dated as of January 26, 1996, between
             the Registrant and investors.
 
10.21**    Amended and Restated Series B Preferred Stock Purchase Agreement dated October 31, 1996,
             between Registrant and investors.
 
10.22**    Form of Series B Preferred Stock Purchase Warrant between the Registrant and certain of the
             Registrant's investors.
 
10.23**    Series C Preferred Stock Purchase Agreement dated July 25, 1997, between the Registrant and
             investors.
 
10.24**    Series D Preferred Stock Purchase Agreement dated October 13, 1997, between the Registrant
             and investors.
 
10.25**    Full Recourse Promissory Note dated as of July 11, 1997, between the Registrant and W.
             Michael Long.
 
10.26**    Form of Promissory Note for Bridge Financing
 
10.27      W. Michael Long Employment Agreement
 
10.28      Michael Hoover Employment Agreement
 
21.1**     Subsidiaries of the Registrant.
 
23.1*      Consent of Wilson Sonsini Goodrich & Rosati, Professional Corporation (included in Exhibit
             5.1).
 
23.2**     Consent of Ernst & Young LLP, independent auditors (see page II-7).
 
23.3**     Consent of Deloitte & Touche LLP, independent auditors (see page II-8).
 
23.4**     Consent of Deloitte & Touche LLP, independent auditors (see page II-9).
 
24.1**     Power of Attorney (see page II-6).
 
27.1**     Financial Data Schedule.
</TABLE>
    
 
- ---------
 
*   To be supplied by amendment.
 
   
**  Previously filed.
    
 
+   Confidential treatment requested as to portions of this exhibit.

<PAGE>


                         AGREEMENT AND PLAN OF MERGER

                                 BY AND AMONG
                                          
                             ACTAMED CORPORATION,

                            EDI ACQUISITION, INC.,
                                        
                         UHC GREEN ACQUISITION, INC.

                                     AND

                        UNITED HEALTHCARE CORPORATION


<PAGE>

                              TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                        PAGE
                                                                        ----
<S>                                                                     <C>
ARTICLE 1  TRANSACTIONS AND TERMS OF MERGER. . . . . . . . . . . . . .    1

     1.1   Merger. . . . . . . . . . . . . . . . . . . . . . . . . . .    1
     1.2   Time and Place of Closing . . . . . . . . . . . . . . . . .    2
     1.3   Effective Time. . . . . . . . . . . . . . . . . . . . . . .    2
     1.4   Items to Be Delivered at Closing. . . . . . . . . . . . . .    2

ARTICLE 2  THE SURVIVING CORPORATION . . . . . . . . . . . . . . . . .    4

     2.1   Articles of Incorporation . . . . . . . . . . . . . . . . .    4
     2.2   Bylaws. . . . . . . . . . . . . . . . . . . . . . . . . . .    4
     2.3   Directors and Officers. . . . . . . . . . . . . . . . . . .    4

ARTICLE 3  MANNER OF CONVERTING SHARES . . . . . . . . . . . . . . . .    5

     3.1   Conversion of Shares. . . . . . . . . . . . . . . . . . . .    5
     3.2   Exchange Procedures . . . . . . . . . . . . . . . . . . . .    5

ARTICLE 4  REPRESENTATIONS AND WARRANTIES OF UHC AND THE COMPANY . . .    5

     4.1   Ownership of Shares; Operations . . . . . . . . . . . . . .    5
     4.2   Capacity and Validity . . . . . . . . . . . . . . . . . . .    6
     4.3   Organization, Standing and Foreign Qualification. . . . . .    6
     4.4   Capital Stock . . . . . . . . . . . . . . . . . . . . . . .    6
     4.5   Subsidiaries and Investments. . . . . . . . . . . . . . . .    7
     4.6   EDI Financial Statements. . . . . . . . . . . . . . . . . .    7
     4.7   Absence of Undisclosed Liabilities. . . . . . . . . . . . .    7
     4.8   No Liabilities as Guarantor . . . . . . . . . . . . . . . .    8
     4.9   Absence of Changes. . . . . . . . . . . . . . . . . . . . .    8
     4.10  Indebtedness. . . . . . . . . . . . . . . . . . . . . . . .    9
     4.11  Tax Matters . . . . . . . . . . . . . . . . . . . . . . . .   10
     4.12  Real Property . . . . . . . . . . . . . . . . . . . . . . .   10
     4.13  Personal Property . . . . . . . . . . . . . . . . . . . . .   10
     4.14  Intellectual Property . . . . . . . . . . . . . . . . . . .   11
     4.15  Accounts and Notes Receivable . . . . . . . . . . . . . . .   11
     4.16  The Proprietary Software. . . . . . . . . . . . . . . . . .   11
     4.17  Insurance . . . . . . . . . . . . . . . . . . . . . . . . .   12
     4.18  Compliance with Laws. . . . . . . . . . . . . . . . . . . .   12
     4.19  Environmental Conditions. . . . . . . . . . . . . . . . . .   13
     4.20  Litigation and Claims . . . . . . . . . . . . . . . . . . .   13
     4.21  Contracts and Commitments; Warranties . . . . . . . . . . .   13
     4.22  Powers of Attorney. . . . . . . . . . . . . . . . . . . . .   14
     4.23  Benefit Plans . . . . . . . . . . . . . . . . . . . . . . .   14


                                      -i-

<PAGE>

                                                                        PAGE
                                                                        ----
     4.24  Remuneration. . . . . . . . . . . . . . . . . . . . . . . .   14
     4.25  Union and Employment Agreements . . . . . . . . . . . . . .   14
     4.26  Officers, Directors, and Bank Accounts. . . . . . . . . . .   15
     4.27  Interested Party Transactions . . . . . . . . . . . . . . .   15
     4.28  Brokers and Finders . . . . . . . . . . . . . . . . . . . .   15
     4.29  Investment Representations; Legend on Shares. . . . . . . .   15
     4.30  Compliance with Regulation D Information Requirements . . .   16
     4.31  Schedules . . . . . . . . . . . . . . . . . . . . . . . . .   17

ARTICLE 5  REPRESENTATIONS AND WARRANTIES OF ACTAMED AND SUBCORP . . .   17

     5.1   Organization and Good Standing. . . . . . . . . . . . . . .   17
     5.2   Authorization of Agreement, No Breach . . . . . . . . . . .   18
     5.3   Corporate Power . . . . . . . . . . . . . . . . . . . . . .   18
     5.4   ActaMed Financial Statements. . . . . . . . . . . . . . . .   18
     5.5   Consents. . . . . . . . . . . . . . . . . . . . . . . . . .   19
     5.6   Capitalization. . . . . . . . . . . . . . . . . . . . . . .   19
     5.7   Validity and Rights of the Preferred Shares . . . . . . . .   19
     5.8   Registration Rights . . . . . . . . . . . . . . . . . . . .   20
     5.9   Offering. . . . . . . . . . . . . . . . . . . . . . . . . .   20
     5.10  Changes . . . . . . . . . . . . . . . . . . . . . . . . . .   20
     5.11  Subsidiaries. . . . . . . . . . . . . . . . . . . . . . . .   20
     5.12  Pending Litigation, etc.. . . . . . . . . . . . . . . . . .   20
     5.13  Title to Properties . . . . . . . . . . . . . . . . . . . .   20
     5.14  Intellectual Property, etc. . . . . . . . . . . . . . . . .   21
     5.15  Compliance with Other Instruments . . . . . . . . . . . . .   21
     5.16  Compliance with Law . . . . . . . . . . . . . . . . . . . .   22
     5.17  Employees . . . . . . . . . . . . . . . . . . . . . . . . .   22
     5.18  Benefit Plans . . . . . . . . . . . . . . . . . . . . . . .   22
     5.19  Compliance with Environmental Laws. . . . . . . . . . . . .   22
     5.20  Insurance . . . . . . . . . . . . . . . . . . . . . . . . .   23
     5.21  Material Contracts and Agreements . . . . . . . . . . . . .   23
     5.22  Taxes . . . . . . . . . . . . . . . . . . . . . . . . . . .   23
     5.23  Investment Company. . . . . . . . . . . . . . . . . . . . .   24
     5.24  Labor Relations . . . . . . . . . . . . . . . . . . . . . .   24
     5.25  No Conflict of Interest . . . . . . . . . . . . . . . . . .   25
     5.26  Brokers or Finders. . . . . . . . . . . . . . . . . . . . .   25
     5.27  Full Disclosure . . . . . . . . . . . . . . . . . . . . . .   25

ARTICLE 6  RELATED AGREEMENTS OF THE PARTIES . . . . . . . . . . . . .   25

     6.1   Conduct of Business . . . . . . . . . . . . . . . . . . . .   25
     6.2   Access to Properties. . . . . . . . . . . . . . . . . . . .   26
     6.3   Relationship with Employees and Customers . . . . . . . . .   26
     

                                     -ii-

<PAGE>

                                                                        PAGE
                                                                        ----
     6.4   Hired Employees . . . . . . . . . . . . . . . . . . . . . .   27
     6.5   Employee Benefits . . . . . . . . . . . . . . . . . . . . .   27
     6.6   Other Offers and Exclusive Dealing. . . . . . . . . . . . .   28
     6.7   Certain Tax Matters . . . . . . . . . . . . . . . . . . . .   29
     6.8   Consents and Approvals. . . . . . . . . . . . . . . . . . .   29
     6.9   Qualification and Corporate Existence . . . . . . . . . . .   29
     6.10  Public Announcements. . . . . . . . . . . . . . . . . . . .   29
     6.11  Confidentiality . . . . . . . . . . . . . . . . . . . . . .   30
     6.12  Covenant Not to Compete . . . . . . . . . . . . . . . . . .   30
     6.13  Closing Conditions. . . . . . . . . . . . . . . . . . . . .   30
     6.14  Expenses. . . . . . . . . . . . . . . . . . . . . . . . . .   30
     6.15  Repayment of Debts to Company . . . . . . . . . . . . . . .   31
     6.16  Compliance with Regulation D. . . . . . . . . . . . . . . .   31
     6.17  Voting for Merger . . . . . . . . . . . . . . . . . . . . .   31
     6.18  Antitrust Notification. . . . . . . . . . . . . . . . . . .   31
     6.19  Review of Registration Statement. . . . . . . . . . . . . .   31
     6.20  Escrow of Software. . . . . . . . . . . . . . . . . . . . .   31

ARTICLE 7  CONDITIONS PRECEDENT TO OBLIGATIONS OF ACTAMED AND SUBCORP    32

     7.1   Representations True and Covenants Performed at Closing . .   32
     7.2   Covenants . . . . . . . . . . . . . . . . . . . . . . . . .   32
     7.3   No Injunction, etc. . . . . . . . . . . . . . . . . . . . .   32
     7.4   Approval of Legal Matters . . . . . . . . . . . . . . . . .   32
     7.5   Governmental Approvals. . . . . . . . . . . . . . . . . . .   32
     7.6   No Material Adverse Change. . . . . . . . . . . . . . . . .   32

ARTICLE 8  CONDITIONS PRECEDENT TO THE OBLIGATIONS OF UHC AND THE 
           COMPANY . . . . . . . . . . . . . . . . . . . . . . . . . .   33

     8.1   Representations True and Covenants Performed at Closing . .   33
     8.2   Covenants . . . . . . . . . . . . . . . . . . . . . . . . .   33
     8.3   No Injunction, etc. . . . . . . . . . . . . . . . . . . . .   33
     8.4   Approval of Legal Matters . . . . . . . . . . . . . . . . .   33
     8.5   Governmental Approvals. . . . . . . . . . . . . . . . . . .   33
     8.6   No Material Adverse Change. . . . . . . . . . . . . . . . .   34

ARTICLE 9  SURVIVAL OF REPRESENTATIONS AND WARRANTIES AND 
           INDEMNIFICATION . . . . . . . . . . . . . . . . . . . . . .   34

     9.1   Survival of Representations and Warranties of UHC and the 
           Company . . . . . . . . . . . . . . . . . . . . . . . . . .   34
     9.2   Survival of Representations and Warranties of ActaMed and 
           SubCorp . . . . . . . . . . . . . . . . . . . . . . . . . .   34


                                    -iii-

<PAGE>

                                                                        PAGE
                                                                        ----
     9.3   Obligation of UHC to Indemnify. . . . . . . . . . . . . . .   35
     9.4   Obligation of ActaMed and SubCorp to Indemnify. . . . . . .   35
     9.5   Claims Notice . . . . . . . . . . . . . . . . . . . . . . .   36
     9.6   Procedures Involving Non-Third Party Claims . . . . . . . .   36
     9.7   Procedures Involving Third Party Claims . . . . . . . . . .   36
     9.8   Limitations on Indemnification. . . . . . . . . . . . . . .   37
     9.9   No Release for Fraud. . . . . . . . . . . . . . . . . . . .   38
     9.10  Payment . . . . . . . . . . . . . . . . . . . . . . . . . .   38
     9.11  Exclusive Remedy. . . . . . . . . . . . . . . . . . . . . .   38
     9.12  Arbitration . . . . . . . . . . . . . . . . . . . . . . . .   39

ARTICLE 10 TAX MATTERS . . . . . . . . . . . . . . . . . . . . . . . .   39

     10.1  Tax Indemnities . . . . . . . . . . . . . . . . . . . . . .   39
     10.2  Returns and Payments. . . . . . . . . . . . . . . . . . . .   40
     10.3  Tax Audit . . . . . . . . . . . . . . . . . . . . . . . . .   41
     10.4  Cooperation and Exchange of Information . . . . . . . . . .   41
     10.5  Tax Sharing Agreements. . . . . . . . . . . . . . . . . . .   42
     10.6  Article 9 . . . . . . . . . . . . . . . . . . . . . . . . .   42

ARTICLE 11 TERMINATION . . . . . . . . . . . . . . . . . . . . . . . .   42

     11.1  Method of Termination . . . . . . . . . . . . . . . . . . .   42
     11.2  Notice of Termination . . . . . . . . . . . . . . . . . . .   43
     11.3  Effect of Termination . . . . . . . . . . . . . . . . . . .   43
     11.4  Risk of Loss. . . . . . . . . . . . . . . . . . . . . . . .   43

ARTICLE 12 ADDITIONAL COVENANTS OF ACTAMED . . . . . . . . . . . . . .   44

     12.1  Securities Law Filings. . . . . . . . . . . . . . . . . . .   44
     12.2  Transactions with Substantial Holders . . . . . . . . . . .   44
     12.3  Business and Financial Covenants. . . . . . . . . . . . . .   44
     12.4  Corporate Existence, Business, Maintenance, Insurance . . .   46
     12.5  Payment of Taxes, etc.; ERISA . . . . . . . . . . . . . . .   47
     12.6  Books and Records, Compliance . . . . . . . . . . . . . . .   47
     12.7  Repurchase of Preferred Shares. . . . . . . . . . . . . . .   48
     12.8  Compensation. . . . . . . . . . . . . . . . . . . . . . . .   48

ARTICLE 13 INFORMATIONAL COVENANTS OF ACTAMED. . . . . . . . . . . . .   48

     13.1  Audited Annual Financial Statements . . . . . . . . . . . .   48
     13.2  Quarterly Unaudited Financial Statements. . . . . . . . . .   48
     13.3  Monthly Unaudited Financial Statements. . . . . . . . . . .   49
     13.4  Management's Analysis . . . . . . . . . . . . . . . . . . .   49
     13.5  Budgets . . . . . . . . . . . . . . . . . . . . . . . . . .   49
     13.6  Inspection. . . . . . . . . . . . . . . . . . . . . . . . .   49
     13.7  Other Information . . . . . . . . . . . . . . . . . . . . .   50


                                    -iv-

<PAGE>

                                                                        PAGE
                                                                        ----
ARTICLE 14 GENERAL PROVISIONS. . . . . . . . . . . . . . . . . . . . .   51

     14.1  Notices . . . . . . . . . . . . . . . . . . . . . . . . . .   51
     14.2  Further Assurances. . . . . . . . . . . . . . . . . . . . .   52
     14.3  Waiver. . . . . . . . . . . . . . . . . . . . . . . . . . .   52
     14.4  Assignment. . . . . . . . . . . . . . . . . . . . . . . . .   52
     14.5  Binding Effect. . . . . . . . . . . . . . . . . . . . . . .   53
     14.6  Knowledge . . . . . . . . . . . . . . . . . . . . . . . . .   53
     14.7  Headings. . . . . . . . . . . . . . . . . . . . . . . . . .   53
     14.8  Entire Agreement. . . . . . . . . . . . . . . . . . . . . .   53
     14.9  Governing Law . . . . . . . . . . . . . . . . . . . . . . .   53
     14.10 Counterparts. . . . . . . . . . . . . . . . . . . . . . . .   53
     14.11 Pronouns. . . . . . . . . . . . . . . . . . . . . . . . . .   53
     14.12 Time of Essence . . . . . . . . . . . . . . . . . . . . . .   53
     14.13 Schedules and Exhibits. . . . . . . . . . . . . . . . . . .   53

</TABLE>


                                     -v-

<PAGE>

                           EXHIBITS AND SCHEDULES
<TABLE>
<CAPTION>

EXHIBITS
- --------
<C>            <S>
A              Defined Terms
1.4(a)(1)      Services and License Agreement
1.4(a)(2)      Registration Rights Agreement Amendment
1.4(a)(3)      Stockholders' Agreement Amendment
1.4(a)(4)      Standstill Agreement Amendment
1.4(a)(5)      Terms of Transition Services Agreement
1.4(a)(6)      UHC Compliance Certificate
1.4(a)(7)      UHC Secretary's Certificate
1.4(a)(8)      Company Compliance Certificate
1.4(a)(9)      Company Secretary's Certificate
1.4(b)(2)      Third Amended and Restated Articles of Incorporation
1.4(b)(3)      ActaMed Compliance Certificate
1.4((b)(4)     ActaMed Secretary's Certificate
1.4(b)(5)      SubCorp Compliance Certificate
1.4(b)(6)      SubCorp Secretary's Certificate

SCHEDULES

4.6            EDI Financial Statements
4.9            Changes
4.13(a)        Company Personal Property
4.14           Company Intellectual Property 
4.19           Company Environmental Conditions
4.20           Company Litigation
4.21(a)        Company Contracts
4.27           Interested Party Transactions
5.4(a)         ActaMed Financial Statements
5.4(b)         Undisclosed Liabilities
5.5            Consent Requirements
5.6            ActaMed Derivative Securities
5.12           ActaMed Litigation
5.13           ActaMed Liens
5.14           ActaMed Intellectual Property
5.20           ActaMed Insurance Policies
5.21           ActaMed Contracts
5.22           Description of 1993 IRS Audit
5.24           ActaMed Labor Practices
5.25           ActaMed Conflicts
6.5            Hired Employees
</TABLE>


                                    -vi-

<PAGE>

                        AGREEMENT AND PLAN OF MERGER


     THIS AGREEMENT AND PLAN OF MERGER (this "AGREEMENT"), dated as of March 
1, 1996, is made and entered into by and among ACTAMED CORPORATION, a Georgia 
corporation ("ACTAMED"), EDI ACQUISITION, INC., a Georgia corporation 
("SUBCORP"), UNITED HEALTHCARE CORPORATION, a Minnesota corporation ("UHC") 
and UHC GREEN ACQUISITION, INC., a Nevada corporation (the "COMPANY").

                                  PREAMBLE

     The Boards of Directors of ActaMed, SubCorp and the Company, and UHC are 
of the opinion that the transactions described in this Agreement are in the 
best interests of the parties and their respective shareholders.  UHC is the 
sole shareholder of the Company and ActaMed is the sole shareholder of 
SubCorp.  The assets dedicated to the EDI Services Group of UHC ("EDI") were 
transferred to the Company.  This Agreement provides for the acquisition of 
the Company by ActaMed pursuant to the merger of SubCorp with and into the 
Company.  At the effective time of such merger, the outstanding shares of the 
capital stock of the Company shall be converted into the right to receive 
preferred stock of ActaMed.  As a result, UHC shall become a shareholder of 
ActaMed and the Company shall continue to conduct its business and operations 
as a wholly-owned subsidiary of ActaMed.  The transactions described in this 
Agreement are subject to the approval of the Federal Trade Commission and the 
United States Department of Justice, and the satisfaction of several other 
conditions described in this Agreement.

     Capitalized terms used in this Agreement are defined in EXHIBIT A to 
this Agreement.

                                 AGREEMENT

     In consideration of the mutual representations, warranties and covenants 
contained herein, the parties hereto agree as follows:

                                 ARTICLE 1
                      TRANSACTIONS AND TERMS OF MERGER

     1.1   MERGER.  At the Effective Time, SubCorp shall be merged with and 
into the Company in the Merger.  The Company shall be the Surviving 
Corporation of the Merger and shall be governed by the laws of the State of 
Nevada.  The Merger shall be consummated pursuant to the terms and subject to 
the conditions of this Agreement, which has been approved and adopted by the 
respective Boards of Directors (or authorized committees thereof) of ActaMed, 
SubCorp and the Company, and by UHC.


                                    -vii-

<PAGE>

     1.2   TIME AND PLACE OF CLOSING.  The Closing of the transactions 
contemplated by this Agreement will take place at 9:00 a.m., Atlanta, Georgia 
local time, three business days after satisfaction of the conditions set 
forth in Articles 7 and 8, or on such other day or at such other time as the 
parties hereto may mutually agree.  Notwithstanding the foregoing, if the 
Closing does not occur on the first day of a month, then solely for financial 
accounting and reporting purposes and filing of income tax returns in 
connection with the Company, the parties hereto agree that the transactions 
contemplated herein shall be deemed to have closed on as of the first day of 
the month in which the Closing occurs; provided that the parties hereto agree 
that for all other purposes, including, without limitation, risk of loss, the 
Closing shall occur, and shall be deemed to have occurred, on the actual date 
of the Closing. Executed counterparts of the documents required for the 
Closing shall be exchanged by mail prior to the Closing Date, and the parties 
shall inspect and approve such executed documents prior to the Closing Date.  
Prior to the Closing Date any documents so exchanged shall not be deemed to 
have been delivered, but shall be held in escrow for inspection and approval 
pending the Closing.  On the Closing Date the parties shall confirm to each 
other in writing that the documents are satisfactory, the documents shall be 
deemed to be delivered, the Closing shall occur and the Merger shall be 
effected.

     1.3   EFFECTIVE TIME.  The Merger and other transactions contemplated by 
this Agreement shall become effective at the later of: (a) the date and the 
time that a Certificate of Merger reflecting the Merger is filed with the 
Secretary of State of the State of Georgia or (b) the date and the time that 
articles of merger reflecting the Merger are filed with the Secretary of 
State of the State of Nevada.
 
     1.4   ITEMS TO BE DELIVERED AT CLOSING.  At the Closing, the parties 
shall exchange the following documents in connection with the Merger.

           (a) UHC and the Company shall deliver to ActaMed and SubCorp the 
following:

               (1)  a Services and License Agreement, executed by UHC as 
attached hereto as EXHIBIT 1.4(a)(1);

               (2)  a Second Amendment to the Registration Rights Agreement, 
executed by UHC and substantially in the form of EXHIBIT 1.4(a)(2);

               (3)  a Second Amendment to the ActaMed Stockholders' 
Agreement, executed by UHC and substantially in the form of EXHIBIT 1.4(a)(3);

               (4)  an Amendment to the Standstill Agreement, executed by 
UHC, UHC Management Company, Inc. and HLM Partners VII, L.P. and 
substantially in the form of EXHIBIT 1.4(a)(4);


                                    -viii-

<PAGE>

               (5)  a Transition Services Agreement, to be negotiated in good 
faith by ActaMed and UHC and to be executed by UHC on substantially the terms 
set forth on EXHIBIT 1.4(a)(5);

               (6)  a compliance certificate executed by an appropriate 
officer of UHC and substantially in the form of EXHIBIT 1.4(a)(6);

               (7)  a Secretary's certificate executed by the Secretary of 
UHC and substantially in the form of EXHIBIT 1.4(a)(7);

               (8)  a compliance certificate executed by the President of the 
Company and substantially in the form of EXHIBIT 1.4(a)(8);

               (9)  a Secretary's certificate executed by the Secretary of 
the Company and substantially in the form of EXHIBIT 1.4(a)(9);

               (10) an opinion of Kevin H. Roche to be negotiated in good 
faith by ActaMed, UHC and Mr. Roche;

               (11) the written consents of other persons obtained pursuant 
to SECTION 6.8;

               (12) the resignation of each officer and director of the 
Company;

               (13) all of the books and records of the Company and the 
Company Business including, but not limited to, (a) all corporate and other 
records of the Company and each of its predecessors, including the minute 
books, stock books, stock registers, books of account, leases and contracts, 
deeds, title documents, customer lists, financial statements, (b) employee 
records and (c) such other documents or certificates as shall be reasonably 
requested by ActaMed and SubCorp;

               (14) the good standing and other certificates referred to in 
SECTION 6.9 hereof; and

               (15) all other documents reasonably requested by ActaMed or 
SubCorp.

           (b) ActaMed and the SubCorp shall deliver to UHC and the Company 
the following:

               (1)  executed counterpart originals of the Services and 
License Agreement, the Registration Rights Agreement Amendment, the 
Stockholders' Agreement Amendment, the Standstill Agreement Amendment, the 
Transition Services Agreement and the Sublease Agreement;


                                     -ix-

<PAGE>

               (2)  a certified copy of the Third Amended and Restated 
Articles of Incorporation of ActaMed, filed in the office of the Secretary of 
State of Georgia and substantially in the form of EXHIBIT 1.4(b)(2);

               (3)  a compliance certificate executed by the President of 
ActaMed and substantially in the form of EXHIBIT 1.4(b)(3);

               (4)  a Secretary's certificate executed by the Secretary of 
ActaMed and substantially in the form of EXHIBIT 1.4(b)(4);

               (5)  a compliance certificate executed by the President of 
SubCorp and substantially in the form of EXHIBIT 1.4(b)(5);

               (6)  a Secretary's certificate executed by the Secretary of 
SubCorp and substantially in the form of EXHIBIT 1.4(b)(6);

               (7)  an opinion of Alston & Bird to be negotiated in good 
faith by UHC, ActaMed and Alston & Bird; and

               (8)  all other documents reasonably requested by UHC or the 
Company.

                                 ARTICLE 2
                         THE SURVIVING CORPORATION

     2.1   ARTICLES OF INCORPORATION.  The Articles of Incorporation of the 
Company as in effect immediately prior to the Effective Time shall be the 
Articles of Incorporation of the Surviving Corporation after the Effective 
Time, and thereafter may be amended in accordance with its terms as provided 
by law and this Agreement.

     2.2   BYLAWS.  The Bylaws of SubCorp as in effect immediately prior to 
the Effective Time shall be the Bylaws of the Surviving Corporation, and 
thereafter may be amended in accordance with their terms and as provided by 
laws and this Agreement.

     2.3   DIRECTORS AND OFFICERS.  The directors of SubCorp in office 
immediately prior to the Effective Time shall be the directors of the 
Surviving Corporation, and the officers of SubCorp in office immediately 
prior to the Effective Time shall be the officers of the Surviving 
Corporation, in each case until their respective successors are duly elected 
and qualified.


                                     -x-

<PAGE>

                                  ARTICLE 3
                         MANNER OF CONVERTING SHARES

     3.1   CONVERSION OF SHARES.  Subject to the provisions of this ARTICLE 
3, at the Effective Time, by virtue of the Merger and without any action on 
the part of UHC:

           (a) All of the Company Common Stock issued and outstanding 
immediately prior to the Effective Time shall be deemed canceled and cease to 
be outstanding and shall be converted into the right to receive at the 
Effective Time as consideration from ActaMed for the Merger 10,344,828 shares 
of Series C Preferred Stock of ActaMed.  If, after the date of this Agreement 
and before the Effective Time, ActaMed shall take any action that would have 
caused conversion of the Preferred Shares had they been outstanding, then the 
Company Common Stock shall be exchanged for the number of shares of the 
ActaMed Common Stock that would have been issued upon the conversion of the 
Preferred Shares.  If, after the date of this Agreement and before the 
Effective Time, ActaMed shall take any action that would have caused an 
adjustment to the Series C Conversion Price (as defined in the Restated 
Articles) had the Preferred Stock been outstanding, then the Series C 
Conversion Price shall be so adjusted.

           (b) Any and all shares of Company Common Stock held as treasury 
shares by the Company shall be canceled and retired at the Effective Time, 
and no consideration shall be issued in exchange therefor.

           (c) Each share of the common stock of the SubCorp issued and 
outstanding immediately prior to the Effective Time shall remain issued and 
outstanding from and after the Effective Time and shall be unaffected by the 
Merger.

     3.2   EXCHANGE PROCEDURES.  At the Closing, UHC shall deliver to ActaMed 
the certificates held by it that formerly represented Company Common Stock, 
and shall promptly upon surrender thereof receive in exchange therefor the 
consideration provided in SECTION 3.1 of this Agreement.  The certificates so 
surrendered shall be duly endorsed as ActaMed may require.  Until surrendered 
for exchange in accordance with the provisions of this SECTION 3.2, each 
certificate for Company Common Stock shall from and after the Effective Time 
represent for all purposes only the right to receive the consideration 
provided in SECTION 3.1 of this Agreement in exchange therefor.

                                  ARTICLE 4
            REPRESENTATIONS AND WARRANTIES OF UHC AND THE COMPANY 

     UHC and the Company jointly and severally represent and warrant to 
ActaMed and SubCorp as follows:

     4.1   OWNERSHIP OF SHARES; OPERATIONS.  UHC is the owner of all right, 
title and interest (legal and beneficial) in and to all of the Shares, free 
and clear of any and all 


                                    -xi-

<PAGE>

Liens of any nature whatsoever, and UHC holds no other interest in the 
Company or the Company Business.  Except as pursuant to this Agreement, no 
person or entity has any agreement or option or any right or privilege 
(whether pre-emptive or contractual) capable of becoming an agreement or 
option for the purchase of any of the Shares.  Substantially all of the 
assets required for the operation of the Company Business have been 
transferred to the Company on _____________, 199_ and the Company did not 
have any operations prior to such date.

     4.2   CAPACITY AND VALIDITY.  UHC and the Company each have the full 
power, authority and capacity necessary to enter into and perform its 
obligations under this Agreement and the other UHC Documents and to 
consummate the transactions contemplated hereby and thereby.  This Agreement 
and all other UHC Documents have been or will be duly executed and delivered 
by UHC and the Company, and constitute or will constitute the legal, valid 
and binding obligations of UHC and the Company, enforceable in accordance 
with their respective terms.  Neither the execution, delivery and performance 
of this Agreement or any other UHC Document, nor the consummation of the 
transactions contemplated hereby or thereby, will violate any provisions of 
the articles of incorporation or bylaws of UHC or the Company, or any 
Regulation or Court Order to which UHC or the Company is subject.  

     4.3   ORGANIZATION, STANDING AND FOREIGN QUALIFICATION.  UHC is a 
corporation duly incorporated, validly existing and in good standing under 
the laws of Minnesota.  The Company is a corporation duly incorporated, 
validly existing, and in good standing under the laws of the State of Nevada, 
and has the power and authority to carry on its business in the places as it 
has been and is now being conducted and to own and lease the properties and 
assets which it now owns or leases.  The Company is duly qualified and/or 
licensed to transact business and is in good standing as a foreign 
corporation in the State of Minnesota, and the character of the property 
owned or leased by the Company and the nature of the business conducted by it 
do not require such qualification and/or licensing in any other jurisdiction. 
 Copies of the articles of incorporation and all amendments thereto of the 
Company (certified by the Secretary of State of the State of Nevada), the 
bylaws of the Company (certified by the Secretary of the Company) and copies 
of the corporate minutes of the Company, which have been made available to 
ActaMed and SubCorp for review, are true and complete copies of such 
documents and accurately reflect all proceedings of the shareholders and 
directors of the Company (and all committees thereof).  The stock record 
books of the Company, which have been made available to ActaMed and SubCorp 
for review, contain true, complete and adequate records of the stock 
ownership of the Company and the transfer of the shares of its capital stock.

     4.4   CAPITAL STOCK.  The authorized capital stock of the Company 
consists of 1,000 shares of Common Stock, $.01 par value per share, all of 
which are issued and outstanding.  All of the issued and outstanding Shares 
are duly and validly issued and outstanding, are fully paid and 
nonassessable, and were issued pursuant to a valid exemption from 
registration under the Securities Act and all applicable state securities 


                                  -xii-

<PAGE>

laws.  There are no outstanding warrants, options, rights, calls or other 
commitments of any nature relating to the Company Common Stock or any other 
capital stock of the Company, and there are no outstanding securities of the 
Company convertible into or exchangeable for shares of Company Common Stock 
or any other capital stock of the Company.  There are no shares of capital 
stock held in the treasury of the Company.

     4.5   SUBSIDIARIES AND INVESTMENTS.  The Company has not in the past and 
does not currently own, directly or indirectly, any capital stock or other 
equity, ownership or proprietary interest in any corporation, partnership, 
association, trust, joint venture or other entity.

     4.6   EDI FINANCIAL STATEMENTS.

           (a) SCHEDULE 4.6 contains audited balance sheets of EDI as of 
December 31, 1994, and December 31, 1995, and audited statements of 
operations and statements of cash flows for the three years ending December 
31, 1995, together with the notes thereto and the reports thereon of Deloitte 
& Touche, LLP.

           (b) The EDI Financial Statements (1) are in accordance with the 
books and records of the UHC Group, which have been properly maintained and 
are complete and correct in all material respects; (2) present fairly the 
financial condition, assets and liabilities (whether accrued, absolute, 
contingent or otherwise) of the Company Business as of the respective dates 
indicated and the results of operations for the respective periods indicated; 
(3) have been prepared in accordance with GAAP consistently applied 
throughout the periods involved, and (4) reflect adequate reserves for all 
known Liabilities and reasonably anticipated losses.  

           (c) The EDI Financial Statements contain no untrue statements of 
any material fact nor do they omit to state any material fact required to be 
stated to make the EDI Financial Statements not misleading.  No member of the 
UHC Group has received any advice or notification from its independent 
certified public accountants that the UHC Group has used any improper 
accounting practice that would have the effect of not reflecting or 
incorrectly reflecting in the EDI Financial Statements any properties, 
assets, liabilities, revenues or expenses. The EDI Financial Statements do 
not contain any items of special or nonrecurring income, or other income not 
earned in the ordinary course of business, individually or in the aggregate 
in excess of $5,000.

           (d) The Company owns all of the assets reflected in the EDI 
Financial Statements and the EDI Financial Statements reflect all of the 
assets currently used by EDI in connection with the Company Business. 

     4.7   ABSENCE OF UNDISCLOSED LIABILITIES.  The Company has no 
Liabilities that are not reflected on the EDI Financial Statements, other 
than Liabilities for the performance by the Company after the Closing Date of 
the contracts assigned to the Company as set forth on the Schedules hereto.  


                                   -xiii-

<PAGE>

     4.8   NO LIABILITIES AS GUARANTOR.  The Company is not directly or 
indirectly liable, by guaranty, indemnity, or otherwise, upon or with respect 
to, or obligated, by discount or repurchase agreement or in any other way, to 
provide funds in respect to, or obligated to guarantee or assume any debt, 
dividend or other obligation of any person, corporation, association, 
partnership or other entity.

     4.9   ABSENCE OF CHANGES.  Except as disclosed on SCHEDULE 4.9, and 
except as contemplated by this Agreement, since December 31, 1995, the 
business and operations of the Company have been carried on only in the 
ordinary course, and there has not been any transaction or occurrence, 
whether or not in the ordinary course, in which the Company (and, with 
respect to (e), (f), (h), (i) and (n), any other member of the UHC Group in 
connection with the Hired Employees) has:

           (a) suffered or experienced any event or condition materially and 
adversely affecting the business, operations, assets, properties or condition 
of the Company, financial or otherwise;

           (b) declared, set aside or made, or agreed to declare, set aside 
or make any payments or dividends or any distribution to shareholders, or 
purchased, redeemed or otherwise acquired, directly or indirectly, or agreed 
to purchase, redeem or acquire, any shares of capital stock or other 
securities;

           (c) effected any changes in its capital structure, or issued, sold 
or otherwise transferred any equity or other interest in itself or any other 
securities, or granted or agreed to grant any options or rights to purchase 
any securities;

           (d) suffered any damage, destruction or loss, whether or not 
covered by insurance, which materially and adversely affected the properties 
or business of the Company, or suffered any extraordinary losses or waived 
any rights of substantial value;

           (e) increased the rate of compensation payable or to become 
payable by it to any of its officers, directors, employees or agents over the 
rate being paid to them as of December 31, 1995, or agreed so to do, except 
general hourly rate increases and normal merit increases for employees other 
than officers;

           (f) hired, committed to hire, terminated or received the 
resignation of any Hired Employee;

           (g) suffered any loss or termination, or threatened loss or 
termination, of any material customer or supplier;

           (h) through negotiation or otherwise, made any commitment or 
incurred any Liability, whether or not enforceable, to any labor organization;


                                    -xiv-

<PAGE>

           (i) directly or indirectly paid or entered into a Contract to pay 
any severance or termination pay to any officer, director, employee or agent;

           (j) changed any of the accounting principles followed by it or the 
methods of applying such principles;

           (k) offered or extended more favorable prices, discounts or 
advertising, promotional, display or other allowances than were offered or 
extended regularly as of the date of the most recently dated EDI Financial 
Statements;

           (l) entered into any commitment or transaction not in the ordinary 
course of business involving aggregate value in excess of $10,000 or made or 
approved the making of any capital expenditure exceeding the amount of 
$10,000 in any instance;

           (m) paid, discharged or satisfied any material liability other 
than the payment, discharge or satisfaction of liabilities in the ordinary 
course of business; 

           (n) except in the ordinary course of business and consistent with 
past practice, canceled or compromised any debts or waived or permitted to 
lapse any claims or rights or sold, transferred or otherwise disposed of any 
of its properties or assets;

           (o) incurred any liabilities or obligations (absolute, accrued or 
contingent) in excess of $10,000, except for accounts payable incurred in the 
ordinary course of business;

           (p) mortgaged, pledged, subjected or agreed to subject, any of its 
assets, tangible or intangible, to any Lien, except for Liens for current 
property taxes not yet due and payable;

           (q) terminated or amended any material Contract, License or other 
instrument to which the Company is a party or suffered any loss or 
termination or threatened loss or termination of any existing business 
arrangement or material supplier, the termination or loss of which could 
materially and adversely affect the Company;

           (r) paid or agreed to pay any service charge, interest charge, 
investment charge, intercompany charge or similar fee to any member of the 
UHC Group that is not reflected in the Transition Services Agreement or 
entered into any other transactions other than in the ordinary course of 
business; 

           (s) charged off any bad debts or increased its bad debt reserve; 

           (t) experienced any significant development, quality assurance or 
network operations problems.

     4.10  INDEBTEDNESS.  The Company has no indebtedness for money borrowed.


                                    -xv-

<PAGE>

     4.11  TAX MATTERS.

           (a) The Company has filed all Tax returns and information returns 
required to be filed, taking into account any extensions of the filing 
deadlines which have been validly granted to the Company, and such returns 
are and will be true and correct in all material respects and properly 
reflect the Tax liabilities of the Company for the periods, property or 
events covered thereby, and the Company has paid all Taxes (including 
penalties and interest in respect thereof, if any) that are due, whether 
shown on such returns or not.

           (b) Adequate provision has been made on the EDI Financial 
Statements for all accrued Tax liabilities not required to be paid prior to 
such date and for all current and deferred Taxes.

           (c) The UHC Group has withheld or collected from each of the Hired 
Employees the amount of all Taxes required to be withheld or collected 
therefrom and has paid the same to the proper tax depositories or collecting 
authorities.

           (d) All ad valorem property taxes imposed on the Company and each 
of its predecessors or its Affiliates to which it has succeeded with respect 
to, or which may become a Lien on, its assets have been paid in full.

     4.12  REAL PROPERTY.  The Company neither owns nor leases (either as 
lessee or lessor) any real property.  

     4.13  PERSONAL PROPERTY.

           (a) SCHEDULE 4.13(a) contains a true, complete and correct list of 
the material equipment, machinery, or other tangible personal property owned 
by the Company, other than inventories held for resale and personal property 
of the Hired Employees.  The Company has good and marketable title to all of 
its equipment, machinery, and items of tangible personal property (whether or 
not disclosed in SCHEDULE 4.13(a)), free and clear of any and all Liens of 
any kind or nature.

           (b) The Company does not lease any of the equipment, machinery or 
other items of tangible personal property  used or employed in the Company 
Business.  The Company does not lease any personal property as lessor.

           (c) The equipment, machinery, or other tangible personal property 
owned or leased by the Company is in good operating condition and in a state 
of reasonable maintenance and repair, and is considered adequate and usable 
for the continued operation of the business of the Company as the same is 
presently conducted.


                                   -xvi-

<PAGE>

           4.14     INTELLECTUAL PROPERTY.  SCHEDULE 4.14 contains a list of 
all material Intellectual Property owned by, registered in the name of, or 
used in the Company Business by the UHC Group on the date hereof, or for 
which application has been made.  All licenses constituting Intellectual 
Property are in full force and effect and constitute legal, valid and binding 
obligations of the respective parties thereto, and there have not been and 
there currently are not any Defaults thereunder by any party.  The Company 
owns all of such Intellectual Property free and clear of all assignments, 
Licenses (or sublicenses), restrictions or Liens, except as set forth on 
SCHEDULE 4.14.  None of the Intellectual Property rights in the version and 
form used on the Closing Date in the Company's Business infringes upon or 
otherwise violates the rights of others, nor has any person asserted to UHC 
Group a claim of such infringement, and to the knowledge of UHC Group, no 
person is infringing upon or otherwise violating the Intellectual Property 
rights of the Company.  Except as set forth in SCHEDULE 4.14, the Company is 
not obligated to pay any royalties to any person or entity with respect to 
any Intellectual Property.  The Company does not believe it is or will be 
necessary to utilize any inventions of any of the employees engaged in the 
Company Business (or people the Company currently intends to hire) made prior 
to their employment by any member of the UHC Group.  To the best knowledge of 
the Company, no employee engaged in the Company Business is or has been in 
violation of any term of any employment contract, patent disclosure agreement 
or any other contract or agreement relating to the Intellectual Property or 
the relationship of any such employee with such entity or any other party.
  
     4.15  ACCOUNTS AND NOTES RECEIVABLE.  The accounts receivable and notes 
receivable of the Company as reflected in the most recently dated balance 
sheet included in the EDI Financial Statements, to the extent uncollected on 
the date hereof, and the accounts receivable and notes receivable reflected 
on the books of the Company are: (a) valid and existing, (b) enforceable by 
the Company in accordance with the terms of the instruments or documents 
creating them, and (c) collectible within ninety (90) days in an amount not 
less than the aggregate face amount thereof (net of reserves for doubtful and 
uncollectible accounts) pursuant to the Company's normal collection practices.

     4.16  THE PROPRIETARY SOFTWARE.

           (a) The proprietary computer software of the Company included in the
     Intellectual Property (the "SOFTWARE") performs in accordance with the
     documentation and other written material used in connection with the
     Software, is in machine-readable form, contains all current revisions of
     such software, and includes all computer programs, materials, tapes, object
     and source codes and other written materials related to the Software.  The
     Company has delivered to ActaMed complete and correct copies of all user
     and technical documentation related to the Software.

           (b) Neither the UHC Group nor, to the best knowledge of the UHC
     Group, any employee or agent thereof has developed or assisted in the


                                   -xvii-

<PAGE>

     enhancement of the Software except for enhancements included in the
     Software as delivered to ActaMed pursuant hereto.

           (c) No employee of UHC Group is, or is now expected to be, in default
     under any term of any employment contract, agreement or arrangement
     relating to the Software or noncompetition arrangement, or any other
     Contract or any restrictive covenant relating to the Software or its
     development or exploitation.  The Software was developed entirely by the
     employees of UHC Group during the time they were employees only of UHC
     Group or by consultants who assigned in writing all of their rights in the
     Software to UHC Group.

           (d) All right, title and interest in and to the Software is owned by
     the Company, free and clear of all liens, claims, charges or encumbrances,
     are fully transferable to the Purchaser, and no party other than the
     Company has any interest in the Software, including without limitation, any
     security interest, license, contingent interest or otherwise.  UHC Group's
     development or sale of the Software did and does not violate any rights of
     any other person or entity and UHC Group has not received any communication
     alleging such a violation.  UHC Group does not have any obligation to
     compensate any Person for the development, use, sale or exploitation of the
     Software nor has UHC Group granted to any other person or entity any
     license, option or other right to develop, use, sell or exploit in any
     manner the Software, whether requiring the payment of royalties or not.

           (e) UHC Group has kept secret and has not disclosed the source code
     for the Software to any person or entity other than certain employees of
     UHC Group.  UHC Group has taken all appropriate measures to protect the
     confidential and proprietary nature of the Software.  There have been no
     patents applied for and no copyrights registered for any part of the
     Software.  To the knowledge of UHC Group, there are no trademark rights of
     any person or entity other than UHC Group in the name "ProviderLink".

           (f) Except as set forth in SECTION 6.20, all copies of the Software
     embodied in physical form are being delivered to ActaMed at or prior to the
     Closing.

     4.17  INSURANCE.  UHC has maintained all appropriate types of insurance, 
relative to its and the Company's Business in order to protect UHC and the 
Company's assets and employees.

     4.18  COMPLIANCE WITH LAWS.

           (a) The Company and, in the operation of the Company Business, the 
UHC Group has complied in all material respects with all applicable laws, 
Regulations and orders.  The Company has obtained all material permits, 
licenses, orders, and 


                                  -xviii-

<PAGE>

approvals of federal, state and local governmental and regulatory bodies that 
are required for the ownership, maintenance and operation of the Company's 
premises and facilities and the operation of the Company Business; and no 
member of the UHC Group is aware of any pending threat of cancellation, 
modification or nonrenewal of any such permits, licenses, orders or 
approvals, nor any basis for such cancellation, modification or nonrenewal. 
The Company is not presently in material violation or material Default of any 
such permit, license, order or approval and the present uses of the Company's 
assets do not in any material respect violate any law, Regulation or order.  
No notice or warning from any governmental authority with respect to any 
failure or alleged failure of the Company to comply with any law, Regulation 
or order has been issued or given, nor is any member of the UHC Group aware 
that any such notice or warning is proposed or threatened.  With the 
exception of the acceptance for filing of articles of merger by the 
secretaries of state of the States of Georgia and Nevada, respectively, and 
as set forth in SECTION 6.18, no consent or approval of, prior filing with or 
notice to, or other action by, any governmental body or agency or any other 
third party is required in connection with the execution and delivery of this 
Agreement or any assignment, agreement or other instrument to be executed and 
delivered pursuant to this Agreement by the Company or any of UHC or the 
consummation of the transactions provided for herein or therein.

           (b) There are no material capital expenditures that the Company 
believes are reasonably likely to be required to be made in connection with 
the Company Business as now conducted in order to comply with any Regulations 
or other governmental requirements applicable to the Company Business as it 
is now conducted.

     4.19  ENVIRONMENTAL CONDITIONS.  Except as set forth in SCHEDULE 4.19, 
there are no present or past Environmental Conditions in any way relating to 
the business, properties or assets of the Company.  

     4.20  LITIGATION AND CLAIMS.  There are no outstanding Court Orders or 
quasi-judicial or administrative decisions to which the Company is subject, 
and, except as disclosed on SCHEDULE 4.20, there is no Litigation pending or 
to the best knowledge of the UHC Group threatened against or relating to the 
Company or its assets or businesses.  The UHC Group has not been advised by 
any attorney representing it that there are any "loss contingencies" (as 
defined in FASB 5), which would be required by FASB 5 to be disclosed or 
accrued in financial statements of EDI, were such financial statements 
prepared as of the date hereof. 

     4.21  CONTRACTS AND COMMITMENTS; WARRANTIES.

           (a) SCHEDULE 4.21(a) contains a true, correct and complete list of 
all Contracts to which the Company is a party or by which the Company 
benefits, except for the Contracts that (1) are terminable at will by the 
Company without any Liability, (2) are described in any other Schedule 
hereto, or (3) do not and can not require payments in excess of $5,000 in the 
aggregate following the date hereof.  


                                   -xix-

<PAGE>

           (b) Each of the Contracts listed in SCHEDULE 4.21(a), or described 
in this SECTION 4.21 but which is included in any other Schedule, is in full 
force and effect.  No Default under any of the terms or conditions set forth 
in any of the Contracts to which the Company is a party or any document or 
instrument related thereto has occurred or been asserted by any party which 
could result in monetary damages or termination of the Contract or require 
payments to cure such Default.  Except as reflected in such Schedules, 
neither the execution, delivery and performance of this Agreement or any 
other agreement or other instrument or document to be executed and delivered 
by the Company or UHC pursuant to this Agreement, nor the consummation of the 
transactions contemplated hereby or thereby, will conflict with, result in a 
breach of, or constitute a Default under any Contract to which the Company or 
UHC is a party or by which any of them is bound, affect the continuation, 
validity and effectiveness of any of such Contracts, or any terms thereof, or 
result in the creation of any Lien upon any of the Shares or any of the 
Company's assets or properties, or result in the acceleration of the maturity 
of any payment date of any of the Company's obligations, or increase or 
adversely affect the obligations of the Company thereunder.  True, correct 
and complete copies of all written Contracts or a written description of all 
oral Contracts referred to in SCHEDULE 4.21(a) have been made available to 
ActaMed and SubCorp for review.  

           (c) UHC Group has not given any warranties to any third parties with
respect to the products or services offered by the Company Business.

     4.22  POWERS OF ATTORNEY.  The Company has not given or granted any power
of attorney, whether limited or general, to any person, firm, corporation or
otherwise that is continuing in effect.

     4.23  BENEFIT PLANS.  The Company has not at any time sponsored, 
contributed to or been obligated to contribute to any Benefit Plan.  Neither 
the Company nor UHC has at any time sponsored, contributed to or been 
obligated to contribute to a "multiemployer pension plan" (as defined in 
ERISA Section 4001(a)(3) and 3(37)(A)) or to a "defined benefit plan" (as 
defined in ERISA Section 3(35)).  Except as provided in SECTION 6.5(b) of 
this Agreement, the Company, ActaMed and ActaMed's Affiliates shall  have no 
liability or obligation with respect to (i) employment related liabilities, 
whether contingent or otherwise, arising out of any Hired Employee's or Hired 
Hold-Over Employee's employment with UHC or its Affiliates or (ii) any 
Benefit Plan sponsored, maintained or contributed to by UHC or its Affiliates.

     4.24  REMUNERATION.  The Company has provided complete and accurate 
information to ActaMed relating to the direct compensation (including wages, 
salaries and actual or anticipated bonuses) and benefits paid or provided in 
1995, and the direct compensation and benefits (as described in the preceding 
clause) to be paid in 1996, to all of the Hired Employees.

     4.25  UNION AND EMPLOYMENT AGREEMENTS.  The Company does not have any
employees or independent contractors.  No member of the UHC Group is a party to
any 

                                    - xx -

<PAGE>

union agreement that covered the Hired Employees or Hired Hold-Over 
Employees, nor does any such member have any written or oral agreement that 
is not terminable by it at will with any of the Hired Employees or Hired 
Hold-Over Employees, relating to their employment by or performance of 
service for the Company Business or their compensation therefor.  No union 
attempts to organize such employees have been made, nor are any such attempts 
now threatened so far as is known to UHC or the Company.

     4.26  OFFICERS, DIRECTORS, AND BANK ACCOUNTS.  The Company has provided 
complete and accurate information to ActaMed relating to (a) the names of all 
directors and officers of any member of the UHC Group who are Hired Employees 
and (b) the name and location of each bank or other institution in which the 
Company has an account or safe deposit box, all account numbers and account 
names, and names of all persons authorized to draw thereon or to have access 
thereto.

     4.27  INTERESTED PARTY TRANSACTIONS.

           (a) Except as set forth in SCHEDULE 4.27, the Company is not a 
party to any Contract, loan or other transaction with any of the following 
persons, or in which any of the following persons have any direct or indirect 
interest (other than as a Hired Employee):

               (1)  any director, officer, or employee of any member of the UHC
Group; or

               (2)  any of the spouses, parents, siblings, children, aunts,
uncles, nieces, nephews, in-laws or grandparents of any of the persons described
in clause (1).

           (b) Except as set forth on SCHEDULE 4.27, no member of the UHC Group
is a consultant, partner, principal, director or shareholder of any business
entity (other than the Company or a corporation whose shares are publicly traded
and in which such member of the UHC Group beneficially owns in the aggregate no
more than a 5% equity interest) which is engaged in a business similar to the
Company Business.

     4.28  BROKERS AND FINDERS.  No third party is entitled to receive any 
commission, fees or similar consideration in connection with the transactions 
contemplated by this Agreement based on any arrangement or agreement made by 
or on behalf of UHC or the Company.

     4.29  INVESTMENT REPRESENTATIONS; LEGEND ON SHARES.  UHC hereby 
acknowledges that the Preferred Shares (or Conversion Shares) delivered 
pursuant to the Merger will not be registered under the Securities Act, and 
the resale of such shares will therefore be subject to restrictions imposed 
by federal and state securities laws.  UHC represents to and agrees with 
ActaMed and SubCorp as follows with respect to the Preferred Shares (and 
Conversion Shares):

                                    - xxi -

<PAGE>

           (a) It is acquiring the shares for its own account for investment
purposes only, and not with a view to the distribution, transfer, or assignment
of the same in whole or in part.  

           (b) ActaMed and SubCorp have advised it, a reasonable time prior 
to the execution of this Agreement, that the shares have not been registered 
under the Securities Act and, therefore, cannot be sold or otherwise disposed 
of except in a transaction which is registered under the Securities Act or 
exempted from registration.

           (c) It has been represented by counsel and advisers, each of whom 
has been previously selected by UHC, as UHC has found necessary to consult 
concerning this Agreement and the shares to be issued pursuant to this 
Agreement.  UHC, either alone or with its representative(s), has such 
knowledge and experience in financial or business matters that it is capable 
of evaluating the merits and risks of the prospective investment.  

           (d) UHC and its counsel and other advisers have been provided with 
the information described in SECTION 4.30 and with such other information 
concerning ActaMed as they have deemed relevant with respect to UHC's 
investment decision relating to the shares being delivered to it.  UHC has 
had a reasonable opportunity to ask questions and receive answers concerning 
the terms and conditions of the transactions contemplated by this Agreement, 
to discuss ActaMed's business, management and financial affairs with the 
management of ActaMed and SubCorp, and to obtain any additional information 
which ActaMed or SubCorp possesses or can acquire without unreasonable effort 
or expense that is necessary to verify the accuracy of the information 
furnished.  UHC has received satisfactory responses from management of 
ActaMed and SubCorp to UHC's inquiries.

           (e) UHC acknowledges that all certificates representing the shares 
delivered to UHC shall be stamped or otherwise imprinted with a legend 
substantially in the following form (together with any other legend required 
by state law), and that stop transfer orders will be given to ActaMed's 
transfer agent:
    
            "THESE SECURITIES HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT
           OF 1933 OR ANY STATE SECURITIES ACTS AND MAY NOT BE TRANSFERRED OR
           OTHERWISE DISPOSED OF UNLESS THEY HAVE BEEN REGISTERED UNDER THE
           SECURITIES ACT OF 1933 AND ANY APPLICABLE STATE SECURITIES ACTS OR
           EXEMPTIONS FROM SUCH REGISTRATIONS ARE AVAILABLE."

     4.30  COMPLIANCE WITH REGULATION D INFORMATION REQUIREMENTS.  

           (a) ActaMed and SubCorp have provided to UHC, a reasonable time 
prior to the execution of this Agreement: (1) ActaMed's Financial Statements 
for the year 

                                    - xxii -

<PAGE>

ended December 31, 1995; (2) a brief description of the Preferred Shares; and 
(3) a brief description of the business of ActaMed.  The contents of material 
exhibits to such materials have been identified and such exhibits have been 
made available to UHC, upon its written request, a reasonable time prior to 
the execution of this Agreement.

           (b) ActaMed and SubCorp have made available to UHC a reasonable 
time prior to the execution of this Agreement the opportunity to ask 
questions and receive answers concerning the terms and conditions of the 
transactions contemplated by this Agreement and to obtain any additional 
information which ActaMed or SubCorp possesses or can acquire without 
unreasonable effort or expense that is necessary to verify the accuracy of 
the information furnished pursuant to paragraph (a) above.

           (c) ActaMed and SubCorp have advised UHC of the limitations on 
resale of Preferred Shares (and Conversion Shares) imposed by Regulation D 
promulgated under the Securities Act.

     4.31  SCHEDULES.  All Schedules referenced in this ARTICLE 4 are true, 
correct and complete as of the date of this Agreement, and will be true, 
correct and complete as of the Closing.  Matters disclosed on each such 
Schedule shall be deemed disclosed only for purposes of the matters to be 
disclosed on such Schedule and shall not be deemed to be disclosed for any 
other purpose unless expressly provided therein.

                                     ARTICLE 5
               REPRESENTATIONS AND WARRANTIES OF ACTAMED AND SUBCORP 

     ActaMed and SubCorp jointly and severally represent and warrant to UHC and
the Company as follows:

     5.1   (a) ORGANIZATION AND GOOD STANDING.  ActaMed and SubCorp are duly
organized and validly existing corporations in good standing under the laws of
the States of Georgia and have full corporate power to carry on their
businesses, to own and operate their properties and assets, and to consummate
the transactions contemplated by this Agreement.

           (b) QUALIFIED TO DO BUSINESS.  ActaMed is currently engaged in the
ActaMed Business.  ActaMed is qualified to do business as a foreign corporation
in each jurisdiction in which the failure to be so qualified would have a
Material Adverse Effect.

           (c) INCORPORATION DOCUMENTS.  ActaMed has delivered to UHC and the
Company true, correct and complete copies of the Restated Articles and Bylaws of
ActaMed, including all amendments thereto, as presently in effect.  

           (d) POWER TO CONDUCT BUSINESS.  ActaMed has all corporate power 
and all governmental licenses, authorizations, consents and approvals 
required to carry on 

                                   - xxiii -

<PAGE>

the ActaMed Business as now conducted and as proposed to be conducted and to 
own, operate and lease its properties and assets, except for those licenses, 
authorizations, consents and approvals the failure of which to have would not 
have a Material Adverse Effect.

     5.2   AUTHORIZATION OF AGREEMENT, NO BREACH.  The execution and delivery 
of this Agreement have been duly authorized by all necessary corporate action 
on the part of ActaMed and SubCorp, and no further corporate action of any 
nature is required pursuant to the charter or bylaws of ActaMed or SubCorp.  
All persons who have executed or will execute this Agreement, or any other 
agreement or document called for by this Agreement, on behalf of ActaMed or 
SubCorp have been duly authorized to do so by all necessary corporate action. 
This Agreement constitutes, and all of the ActaMed Documents to be executed 
and delivered by ActaMed or SubCorp pursuant to this Agreement will 
constitute, legal, valid and binding obligations of ActaMed and SubCorp, 
enforceable against ActaMed and SubCorp in accordance with their respective 
terms, except as enforceability may be limited by applicable equitable 
principles, or by bankruptcy, insolvency, reorganization, moratorium or 
similar laws from time to time in effect affecting the enforcement of 
creditors' rights generally.  The execution, delivery and performance of this 
Agreement and the other ActaMed Documents and the consummation of the 
transactions contemplated hereby and thereby will not (1) violate or result 
in a breach of or Default or acceleration under the charter or bylaws of 
ActaMed or SubCorp or any material instrument or agreement to which ActaMed 
or SubCorp is a party or is bound, (2) violate any Court Order, 
quasi-judicial or administrative decision or award of any court, arbitrator, 
mediator, tribunal, administrative agency or governmental body applicable to 
or binding upon ActaMed or SubCorp or upon the securities, property or 
business of ActaMed or SubCorp, or (3) violate any Regulation of any 
administrative agency or governmental body relating to ActaMed or SubCorp, or 
to the securities, property, or business of ActaMed or SubCorp.
     
     5.3   CORPORATE POWER.  ActaMed and SubCorp have the requisite corporate
power to execute and deliver the ActaMed Documents to which either is a party.
     
     5.4   ACTAMED FINANCIAL STATEMENTS.

           (a) The Company has set forth as SCHEDULE 5.4(a) hereto the 
balance sheets of ActaMed at December 31, 1994 and December 31, 1995 and the 
statements of operations, statements of stockholders equity and statements of 
cash flows of ActaMed for the years ended December 31, 1994 and December 31, 
1995, which have been audited by Deloitte & Touche, LLP independent 
accountants; and

           (b) The ActaMed Financial Statements have been prepared in accordance
with GAAP applied on a consistent basis during the respective periods covered
thereby.  The ActaMed Financial Statements are correct and complete and present
fairly in all material respects the financial position of ActaMed at the date of
the balance sheet included therein and the results of operations and cash flows
of ActaMed 

                                   - xxiv -

<PAGE>

for the respective periods covered by the statements of operations and cash 
flows included therein.  Except as set forth on SCHEDULE 5.4(b) hereto, 
ActaMed has no material obligations or liabilities of any nature whatsoever 
(whether absolute, accrued, contingent or otherwise and whether due or not 
due) which are required to be disclosed in the ActaMed Financial Statements 
in accordance with GAAP and which, either individually or in the aggregate, 
would have a Material Adverse Effect and which are not disclosed by the 
ActaMed Financial Statements.
     
     5.5   CONSENTS.  No consent, approval or authorization of, or 
qualification, designation, declaration or filing with, or notice to any 
governmental authority on the part of ActaMed is required in connection with 
(a) the valid execution and delivery of the ActaMed Documents and (b) the 
issuance of the Preferred Shares (and the Conversion Shares, except (1) as 
set forth on SCHEDULE 5.5, (2) the filing of the Restated Articles in the 
office of the Secretary of State of the State of Georgia, which filings will 
be accomplished on or prior to the Closing Date, (3) the filing of a Form D 
with the SEC and (4) the qualification (or taking such action as may be 
necessary to secure an exemption from qualification, if available) of the 
offer and sale of the Preferred Shares (and the Conversion Shares) under any 
applicable state securities laws, which qualification, if required, will be 
accomplished in a timely manner prior to or promptly upon completion of the 
Closing, as required by such laws.
     
     5.6   CAPITALIZATION.  After giving effect to the issuance of the 
Preferred Shares, the capital stock of ActaMed, as authorized by its Restated 
Articles will consist of: (1) 50,000,000 shares of ActaMed Common Stock, no 
par value per share, 9,321,250 of which are issued and outstanding, 
10,344,828 of which will be reserved for issuance upon conversion of the 
Preferred Shares, 8,800,880 of which will be reserved for issuance upon 
conversion of issued and outstanding Series A Preferred Stock, 3,448,276 of 
which will be reserved for issuance upon conversion of issued and outstanding 
Series B Preferred Stock, and 5,624,188 of which will be reserved for 
issuance upon exercise of stock options granted or to be granted to officers, 
key employees, directors and consultants of ActaMed; (2) 8,800,880 shares of 
Series A Preferred Stock all of which are issued and outstanding, and (3) 
3,448,276 shares of Series B Preferred Stock, all of which are issued and 
outstanding, and 10,344,828 shares of the Preferred Shares, all of which will 
be issued and outstanding.  As of the Closing Date none of such issued shares 
will be held in the treasury of ActaMed.  Except as set forth above and on 
SCHEDULE 5.6 hereto, as of the Closing Date ActaMed will not have outstanding 
any stock or securities convertible into or exchangeable for any shares of 
its capital stock and no person will have any right against ActaMed to 
subscribe for or to purchase, or any options for the purchase of, or any 
agreements providing for the issuance of any capital stock or any stock or 
securities convertible into capital stock of ActaMed.  All of the outstanding 
shares of capital stock of ActaMed are validly issued, fully paid and 
nonassessable.
     
     5.7   VALIDITY AND RIGHTS OF THE PREFERRED SHARES.  The Preferred Shares,
when issued to UHC pursuant to this Agreement, will be validly issued, fully
paid and nonassessable, will have the designations, preferences, limitations,
and relative rights set 

                                    - xxv -

<PAGE>

forth in the Restated Articles and will be free and clear of all liens, 
claims and encumbrances.  Any and all of the Conversion Shares, when 
issuable, will be validly issued, fully paid and nonassessable.
     
     5.8   REGISTRATION RIGHTS.  Except as set forth in the Registration 
Rights Agreement, as of the Closing Date ActaMed will not be under any 
obligation to register under the Securities Act any of its then outstanding 
securities or any of its securities which may thereafter be issued.
     
     5.9   OFFERING.  Subject to the accuracy of representations and 
warranties by UHC and the Company in ARTICLE 4 hereof, the issuance of the 
Preferred Shares (and the issuance of the Conversion Shares) constitute 
transactions exempt from the registration requirements of Section 5 of the 
Securities Act, and from the qualification requirements of any applicable 
state securities or "blue sky" laws.
     
     5.10  CHANGES.  Since the date of the latest ActaMed Financial 
Statements, there has not been any adverse change in the assets, liabilities, 
financial condition or operations of the ActaMed Business from that reflected 
in the ActaMed Financial Statements, other than changes in the ordinary 
course of business, none of which individually or in the aggregate has had a 
Material Adverse Effect, any adverse change in the prospects of the ActaMed 
Business or any other event or condition (or events or conditions) of any 
character which, either individually or cumulatively, has had a Material 
Adverse Effect.
     
     5.11  SUBSIDIARIES.  Other than SubCorp, ActaMed has no Subsidiaries. 
Except as set forth in this Agreement, ActaMed does not own, or have the 
right to acquire, any securities or other equity or ownership interest in any 
corporation, association or other business entity or person.  
     
     5.12  PENDING LITIGATION, ETC.  Other than as set forth in SCHEDULE 5.12 
hereto, there are no actions at law, suits in equity or other proceedings or, 
to the best knowledge of ActaMed, investigations in any court, tribunal or by 
or before any other governmental or public authority or agency or any 
arbitrator or arbitration panel or any governmental or private third-party 
insurance agency, pending or, to the best knowledge of ActaMed, threatened 
against or affecting ActaMed that:
     
           (a) either individually or in the aggregate, would have a Material
Adverse Effect; or

           (b) would question the validity or enforceability of this Agreement,
the ActaMed Documents, or any of the transactions contemplated hereby and
thereby.  ActaMed is not in default with respect to any Court Order.

     5.13  TITLE TO PROPERTIES.  ActaMed has good and marketable title to its
properties and assets and has good title to all its respective leasehold
interests, in each case subject to no Lien, other than as set forth on
SCHEDULE 5.13 hereto. SCHEDULE 5.13 

                                   - xxvi -

<PAGE>

accurately lists with respect to the personal property owned by ActaMed (a) 
each financing statement, deed, agreement or other instrument which has been 
filed, recorded or registered pursuant to any United States federal, state or 
local law or regulation that names a business entity as debtor or lessee or 
as the grantor or the transferor of the interest created thereby, and (b) as 
to each such financing statement, deed, agreement or other instrument, the 
names of the debtor, lessee, grantor or transferor and the secured party, 
lessor, grantee or transferee and the name of the jurisdiction in which such 
financing statement, deed, agreement or other instrument has been filed, 
recorded or registered.  ActaMed has not signed any agreement or instrument 
authorizing any secured party thereunder to file any such financing 
statement, deed, agreement or other instrument.
     
     5.14  INTELLECTUAL PROPERTY, ETC.  ActaMed owns or possesses the rights 
to use, free from burdensome restrictions or conflicts with the rights of 
others, all copyrights, trademarks, service marks, trade names, patents and 
intellectual property licenses, and all rights with respect to the foregoing, 
necessary for the conduct of the ActaMed Business as now conducted and as 
proposed to be conducted, and is in compliance in all material respects with 
the terms and conditions, if any, of all such copyrights, trademarks, service 
marks, trade names, patents and intellectual property licenses and the terms 
and conditions of any agreements relating thereto.  Except as set forth on 
SCHEDULE 5.14, there are no outstanding options, licenses, or material 
agreements of any kind relating to the foregoing, nor is ActaMed bound by or 
a party to any options, licenses or agreements of any kind with respect to 
the patents, trademarks, service marks, trade names, copyrights, trade 
secrets, licenses, information, proprietary rights and processes of any other 
person or entity.  ActaMed has not received any communications alleging that 
it has violated or, by conducting its business as proposed, would violate any 
of the patents, trademarks, service marks, trade names, copyrights or trade 
secrets or other proprietary rights of any other person or entity.  To 
ActaMed's knowledge, none of its employees are obligated under any contract 
(including licenses, covenants or commitments of any nature) or other 
agreement, or subject to any judgment, decree or order of any court or 
administrative agency, that would interfere with the use of their best 
efforts to promote the interests of ActaMed or that would conflict with 
ActaMed's business as proposed to be conducted.  Neither the execution nor 
delivery of this Agreement, nor the carrying on of ActaMed's business by the 
employees of ActaMed, nor the conduct of ActaMed's business as proposed, 
will, to ActaMed's knowledge, conflict with or result in a breach of the 
terms, conditions or provisions of, or constitute a default under, any 
contract, covenant or instrument under which any of such employees is now 
obligated. ActaMed does not believe it is or will be necessary to utilize any 
inventions of any of its employees (or people it currently intends to hire) 
made prior to their employment by ActaMed.
     
     5.15  COMPLIANCE WITH OTHER INSTRUMENTS.  ActaMed is not in violation of or
in default in any material respect under any term of its organizational
documents, any term or provision of any mortgage, indenture, contract,
agreement, instrument, judgment or decree, and is not in violation in any
material respect of any applicable order, statute, rule or regulation, and to
ActaMed's knowledge there is no state of facts which, with the 

                                   - xxvii -

<PAGE>

passage of time or giving of notice or both, would constitute any such 
violation or default that would in the aggregate have a Material Adverse 
Effect.  The execution, delivery and performance of and compliance with the 
ActaMed Documents, the issuance of the Preferred Shares (and the Conversion 
Shares) and the consummation of any other transaction contemplated by the 
ActaMed Documents have not resulted and will not result in any such 
violation, or be in conflict with, or constitute a default under any of the 
foregoing, or result in the creation of any Lien upon any of the properties 
or assets of ActaMed.
     
     5.16  COMPLIANCE WITH LAW.  ActaMed is in compliance with all statutes, 
laws and ordinances and all governmental rules and regulations to which it is 
subject, the violation of which, either individually or in the aggregate, 
would have a Material Adverse Effect.  Neither the execution, delivery or 
performance of this Agreement or any of the other ActaMed Documents nor the 
consummation of the transactions contemplated by the ActaMed Documents will 
cause ActaMed to be in violation of any law or ordinance, or any order, rule 
or regulation, of any federal, state, municipal or other governmental or 
public authority or agency.
     
     5.17  EMPLOYEES.  To the best knowledge of ActaMed, no employee of 
ActaMed is in violation of any term of any employment contract, patent 
disclosure agreement or any other contract or agreement relating to the 
intellectual property of ActaMed or the relationship of any such employee 
with such entity or any other party.
     
     5.18  BENEFIT PLANS.  Except as provided in this Agreement, applicable 
law and the terms of any Benefit Plan sponsored, maintained or contributed to 
by UHC or its Affiliates, neither UHC nor its Affiliates shall  have any 
liability or obligation with respect to (i) employment related liabilities, 
whether contingent or otherwise, arising out of any Hired Employee's or Hired 
Hold-Over Employee's employment with the Company, ActaMed or ActaMed's 
Affiliates or (ii) any Benefit Plan sponsored, maintained or contributed to 
by ActaMed or its Affiliates.
     
     5.19  COMPLIANCE WITH ENVIRONMENTAL LAWS. (a) ActaMed is, and will 
continue to be, in compliance with all applicable federal, state and local 
environmental laws, regulations and ordinances governing the ActaMed Business 
with respect to all discharges into the ground and surface water, emissions 
into the ambient air and generation, accumulation, storage, treatment, 
recycling, transportation, labeling or disposal of waste materials or process 
by-products, except violations which, either individually or in the 
aggregate, would not have a Material Adverse Effect.  ActaMed is not liable 
for any material penalties, fines or forfeitures for failure to comply with 
any of the foregoing.  All licenses, permits or registrations required for 
the ActaMed Business as presently conducted and proposed to be conducted, 
under any federal, state, or local environmental laws, regulations or 
ordinances have been or will, in a timely manner, be obtained or made, other 
than such licenses, permits or registrations as to which the failure to 
obtain or make, either individually or in the aggregate, will not have a 
Material Adverse Effect, and ActaMed is in compliance therewith in all 
material respects.

                                  - xxviii -

<PAGE>

           (b) No release, emission or discharge into the environment of 
hazardous substances, as defined under the Comprehensive Environmental 
Response, Compensation, and Liability Act, as amended, or hazardous waste, as 
defined under the Resource Conservation and Recovery Act, or air pollutants 
as defined under the Clean Air Act, or pollutants, as defined under the Clean 
Water Act, by ActaMed has occurred or is presently occurring on or from any 
property owned or leased by ActaMed in excess of federal, state or local 
permitted releases or reportable quantities, or other concentrations, 
standards or limitations under the foregoing laws or any state or local law 
governing the protection of health and the environment or under any other 
federal, state or local laws or regulations (then or now applicable, as the 
case may be) other than such releases, emissions or discharges, either 
individually or in the aggregate, would not have a Material Adverse Effect.

           (c) To its knowledge, ActaMed has never (1) owned, occupied or 
operated a site or structure on or in which any hazardous substance was or is 
stored, transported or disposed of in violation of any federal, state or 
local environmental laws, regulations or ordinances at such time as such site 
or structure was owned, occupied or operated by ActaMed or at any other time, 
or (2) transported or arranged for the transportation of any hazardous 
substance other than in full compliance with all applicable federal, state 
and local environmental laws, regulations and ordinances governing the 
ActaMed Business or the storage, transportation or disposal of hazardous 
substances except for such violations as, either individually or in the 
aggregate, would not have a Material Adverse Effect.  ActaMed has never 
caused or been held legally responsible for any release or threatened release 
of any hazardous substance, or received notification from any federal, state 
or other governmental authority of any such release or threatened release, or 
that ActaMed may be required to pay any costs or expenses incurred or to be 
incurred in connection with any efforts to mitigate the environmental impact 
of any release or threatened release, of any hazardous substance from any 
site or structure owned, occupied or operated by ActaMed, except such 
releases or threatened releases as, either individually or in the aggregate, 
would not have a Material Adverse Effect.
     
     5.20  INSURANCE.  The ActaMed Business has fire, casualty, liability, and
business interruption insurance policies with recognized insurers, in such
amounts and with such coverage as set forth on SCHEDULE 5.20.
     
     5.21  MATERIAL CONTRACTS AND AGREEMENTS.  SCHEDULE 5.21 lists the 
parties to, and subject matter of, all material Contracts of the ActaMed 
Business, including without limitation, all employment or labor contracts, 
leases or compensation plans.  Except as set forth on SCHEDULE 5.21, all 
material Contracts set forth on such list are valid, binding, and in full 
force and effect, without any breach by ActaMed or, to the best of ActaMed's 
knowledge, any other party thereto.
     
                                   - xxix -

<PAGE>

     5.22  TAXES.  Except as set forth on SCHEDULE 5.22, all federal, state 
and other tax returns of ActaMed required by law to be filed have been duly 
filed, except for such returns the failure of which to file would not have a 
Material Adverse Effect, and all federal, state and other taxes, assessments, 
fees and other federal governmental charges upon ActaMed or any of the 
properties, incomes or assets of ActaMed that are due and payable have been 
paid.  No extensions of the time for the assessment of deficiencies have been 
granted to ActaMed in connection with any federal tax, assessment, fee or 
other federal governmental charge.  There are no Liens, on any properties or 
assets of the ActaMed Business imposed or arising as a result of the 
delinquent payment or the non-payment of any tax, assessment, fee or other 
governmental charge that, either individually or in the aggregate, would have 
a Material Adverse Effect. ActaMed:
     
           (a) has not assumed and is not liable for any federal, state or 
other income tax liability of any other person, including any predecessor 
corporation, as a result of any purchase of assets or other business 
acquisition transaction; and

           (b) has not indemnified any other person or otherwise agreed to 
pay on behalf of any other person tax liability growing out of or which may 
be asserted on the basis of any tax treatment adopted with respect to all or 
any aspect of such a business acquisition transaction.
     
     The charges, accruals and reserves, if any, on the books of ActaMed in 
respect of federal, state and local corporate franchise and income taxes for 
all fiscal periods to date are adequate in accordance with GAAP, and ActaMed 
knows of no additional unpaid assessments for such periods or other 
governmental charges payable by ActaMed in connection with the execution and 
delivery of this Agreement, the ActaMed Documents or the issuance of the 
Preferred Shares by ActaMed, other than stock transfer taxes, recording fees 
and filing fees in connection with state securities or "blue sky" filings.
     
     5.23  INVESTMENT COMPANY.  ActaMed is not an "investment company", or an 
"affiliated person" of an "investment company", or a company "controlled" by 
an "investment company" as such terms are defined in the Investment Company 
Act of 1940, as amended, and ActaMed is not an "investment adviser" or an 
"affiliated person" of an "investment adviser" as such terms are defined in 
the Investment Advisers Act of 1940, as amended.
     
     5.24  LABOR RELATIONS.  ActaMed is not engaged in any unfair labor 
practices which, either individually or in the aggregate, would have a 
Material Adverse Effect.  Except as set forth on SCHEDULE 5.24, there is:
     
           (a) no unfair labor practice complaint pending or, to the best of
ActaMed's knowledge, threatened against ActaMed before the National Labor
Relations Board or any court or labor board, and no grievance or arbitration
proceedings arising out of or under collective bargaining agreements is so
pending or, to the best of ActaMed's knowledge, threatened,

                                    - xxx -

<PAGE>

           (b) no strike, lock-out, labor dispute, slowdown or work stoppage
pending or, to the best of ActaMed's knowledge, threatened against ActaMed, and

           (c) no union representation or certification question existing or 
pending with respect to the employees of ActaMed, and, to the best knowledge 
of ActaMed, no union organization activity taking place, other than such 
actions or proceedings as, either individually or in the aggregate, would not 
have a Material Adverse Effect.

     5.25   NO CONFLICT OF INTEREST.  Except as set forth in SCHEDULE 5.25, 
ActaMed is not indebted, directly or indirectly, to any Substantial Holder, 
or, to ActaMed's knowledge, to any Affiliate of a Substantial Holder, in any 
amount whatsoever.  To the best knowledge of ActaMed, and except as set forth 
on SCHEDULE 5.25, no Substantial Holders, or any of their Affiliates, are 
indebted to any firm or corporation with which ActaMed is affiliated or with 
which ActaMed has a business relationship, or any firm or corporation which 
competes with ActaMed.  Except as contemplated by the ActaMed Documents, no 
Substantial Holder, or, to ActaMed's knowledge, any Affiliate of a 
Substantial Holder, is directly or indirectly interested in any contract with 
ActaMed or any of its Subsidiaries.
     
     5.26  BROKERS OR FINDERS.  No broker, agent, finder or consultant or 
other person has been retained by or on behalf of ActaMed or SubCorp (other 
than legal or accounting advisors), or is may be entitled to be paid based 
upon any agreements or understandings made by ActaMed or SubCorp in 
connection with the transactions contemplated hereby.

     5.27  FULL DISCLOSURE.  This Agreement, the other ActaMed Documents, and 
any report or financial statement referred to in SECTION 5.4 hereof and any 
certificate, report, statement or other writing furnished to UHC or the 
Company by or on behalf of ActaMed in connection with the negotiation of this 
Agreement and the other ActaMed Documents and the sale of the Preferred 
Shares, taken as a whole, do not contain any untrue statement of a material 
fact or omit to state a material fact with respect to which disclosure has 
been requested and which is necessary to make the statements contained herein 
or therein not misleading.

                                     ARTICLE 6
                         RELATED AGREEMENTS OF THE PARTIES

     6.1   CONDUCT OF BUSINESS.  Prior to the Closing Date, except with the 
prior written consent of ActaMed and SubCorp and except as necessary to 
effect the transactions contemplated in this Agreement, the Company shall and 
UHC shall cause the Company to:

                                    - xxxi -

<PAGE>

           (a) conduct the Company Business in substantially the same manner 
as presently being conducted, and refrain from entering into any transaction 
or Contract other than in the ordinary course of business, and not make any 
change in its methods of management, marketing, or operations other than in 
the ordinary course of business;

           (b) consult with ActaMed and SubCorp prior to undertaking any new 
business opportunity not in the ordinary course of business and not undertake 
such new business opportunity without the prior written consent of ActaMed 
and SubCorp, which consent will not be unreasonably withheld;

           (c) confer on a regular and reasonable basis with one or more 
designated representatives of ActaMed and SubCorp to report material 
operational matters and to report the general status of ongoing operations;

           (d) notify ActaMed and SubCorp of any change in the normal course 
of the Company Business or in the operation of its properties, and of any 
governmental complaints, investigations or hearings (or communications 
indicating that the same may be contemplated), adjudicatory proceedings, 
budget meetings or submissions involving any material property of the 
Company, and keep ActaMed and SubCorp fully informed of such events and 
permit its representatives prompt access to all materials prepared in 
connection therewith; and

           (e) not take any action, or omit to take any action, which would 
cause the representations and warranties contained in ARTICLE 4 hereof, 
including but not limited to the representations and warranties in SECTION 
4.9 of this Agreement, to be untrue or incorrect at any time through and 
including the Closing Date.

     6.2   ACCESS TO PROPERTIES.  At all times prior to the Closing Date, 
employees, attorneys, accountants, agents and other authorized and designated 
representatives of ActaMed and SubCorp will be allowed reasonable access to 
the properties, books and records of the Company and other members of the UHC 
Group relating to the Company Business, including without limitation, deeds, 
title documents, leases, customer lists, insurance policies, minute books, 
share certificate books, share registers, accounts, Tax returns, financial 
statements and all other data that, in the reasonable opinion of ActaMed and 
SubCorp, are required for ActaMed and SubCorp to make such investigation as 
they may desire of the Hired Employees and the properties and business of the 
Company and the Company Business.  ActaMed and SubCorp shall also be allowed 
reasonable access to consult with the officers, employees, accountants, 
counsel and agents of the members of the UHC Group in connection with such 
investigation.  No investigation by ActaMed and SubCorp shall diminish or 
otherwise affect any of the representations, warranties, covenants or 
agreements of the Company or UHC under this Agreement.

     6.3   RELATIONSHIP WITH EMPLOYEES AND CUSTOMERS.  At all times prior to 
the Closing Date, UHC shall cause each member of the UHC Group to use its 
best efforts (without making any commitments other than in the ordinary 
course of business), to 

                                  - xxxii -

<PAGE>

(a) preserve the Company Business organization intact, (b) keep the Hired 
Employees available to the Company Business, (c) preserve the present 
relationships of the Company Business with its suppliers and customers and 
others having business relationships, and (d) take all steps reasonably 
necessary to maintain the intangible assets and Intellectual Property of the 
Company.  Prior to the Closing and for two (2) years thereafter, no member of 
the UHC Group shall, directly or indirectly, on its own behalf or on behalf 
of others, solicit, divert or take away, or attempt to solicit, divert or 
take away, any of the Hired Employees. 

     6.4   HIRED EMPLOYEES.  Immediately after the Closing, the Company will 
offer employment (to commence on the Closing Date) to all of the Hired 
Employees; provided, however, that, if any Hold-Over Employee presents a 
medical release from his or her attending physician which allows such 
employee to return to work within nine months after the beginning of his or 
her leave of absence, then the Company will offer employment (to commence 
immediately) to such Hold-Over Employee on the day he or she returns to work 
("HIRED HOLD-OVER EMPLOYEE"), and if any Hold-Over Employee does not have a 
medical release to return to work within such nine-month period, then the 
Company will not be obligated to offer employment to him or her.  UHC shall 
cause each member of the UHC Group to terminate the employment of each of the 
Hired Employees effective as of the Closing Date; provided, however, that no 
member of the UHC Group shall terminate the employment of any Hired Hold-Over 
Employee until such employee presents a medical release from his or her 
attending physician and will continue to provide each Hired Hold-Over 
Employee with benefits in accordance with UHC's standard policies and 
procedures until the earlier of (a) the day such employee has a medical 
release to return to work, or (b) nine (9) months after the beginning of such 
employee's leave of absence.  
     
     6.5   EMPLOYEE BENEFITS.  

           (a) The Company has never been a participating employer in any 
Benefit Plan sponsored, maintained or contributed to by UHC or its 
Affiliates. Except as provided in SECTION 6.5(B) below, no portion of the 
assets of any Benefit Plan heretofore sponsored or maintained by any member 
of the UHC Group for the Hired Employees or Hired Hold-Over Employees (and no 
amount attributable to any such Benefit Plan) shall be transferred to the 
Company, and the Company shall not be required to sponsor or maintain any 
such Benefit Plan after the Closing Date.  The amounts payable to the Hired 
Employees or Hired Hold-Over Employees on account of all benefit arrangements 
(including, but not limited to, all accrued, but unpaid, sick leave but 
excluding the UHC 401(k) Plan) shall be either maintained in such Benefit 
Plan or paid to the Hired Employees and Hired Hold-Over Employees, in each 
case in accordance with the applicable Benefit Plan documents, except that 
such amounts shall be determined with reference to the date of the event by 
reason of which such amounts become payable, without regard to conditions 
subsequent.

                                  - xxxiii -

<PAGE>

           (b) Certain Hired Employees and Hired Hold-Over Employees will 
have account balances under the UHC 401(k) Plan as of the Closing Date.  UHC 
warrants that the UHC 401(k) Plan that will make the transfer described below 
is "qualified" within the meaning of Section 401(k) of the Internal Revenue 
Code, has received a favorable determination letter from the Internal Revenue 
Service dated August, 1995 and no event has occurred and no condition exists 
that could reasonably be expected to result in the revocation of any such 
determination letter.  The vested and nonvested account balances under the 
UHC 401(k) Plan for those Hired Employees and Hired Hold-Over Employees will 
be transferred to the ActaMed 401(k) Plan as soon as administratively 
feasible after the Closing Date but (i) for Hired Employees, no later than 60 
days after the second "valuation date" (as defined in the UHC 401(k) Plan) 
following the Closing Date and (ii) for Hired Hold-Over Employees, no later 
than 60 days after the second "valuation date" following the Hired Hold-Over 
Employee's initial hire date with the Company.  The account balances to be 
transferred will include cash and any outstanding participant loans.  The 
amount transferred will be calculated in accordance with normally accepted 
practices by record keepers and ERISA trustees.  ActaMed warrants that the 
ActaMed 401(k) Plan that will receive the transfer is "qualified" within the 
meaning of Section 401(k) of the Internal Revenue Code, has adopted a 
standardized prototype plan (as defined in Section 3.08 of Rev. Proc. 89-9, 
1989-1 CB 780) with an IRS opinion letter dated November 8, 1993 and no event 
has occurred and no condition exists that could reasonably be expected to 
result in the ActaMed 401(k) Plan losing its status as a qualified, 
standardized prototype plan.  The ActaMed 401(k) Plan will be amended to 
address the transfer of accounts from the UHC 401(k) Plan including the 
preservation of all Section 411(d)(6) optional forms of benefits available to 
the Hired Employees or Hired Hold-Over Employees under the UHC 401(k) Plan, 
distribution rules under Section 401(k) of the Internal Revenue Code, past 
service credit and participation in the ActaMed 401(k) Plan by such Hired 
Employees and Hired Hold-Over Employees.  United HealthCare Corporation will 
assume no liability for the payment of account balances that are transferred 
following the date of transfer and ActaMed will assume no liability for the 
payment of account balances that are not transferred.  However, as provided 
in SECTION 5.18 of this Agreement, ActaMed and its Affiliates shall continue 
to be liable to UHC and its Affiliates for any other loss suffered by UHC and 
its Affiliates arising out of the ActaMed 401(k) Plan.  Similarly, as 
provided in SECTION 4.23 of this Agreement, UHC and its Affiliates shall 
continue to be liable to ActaMed and its Affiliates for any other loss 
suffered by ActaMed and its Affiliates arising out of the UHC 401(k) Plan.

           (c) The Company, ActaMed and ActaMed's Affiliates shall not be 
liable for any claim for insurance, reimbursement or other benefits payable 
by reason of any event which occurs prior to the Closing Date.  
Notwithstanding the foregoing, prior employment of Hired Employees by the UHC 
Group shall be counted for purposes of eligibility for a medical and dental 
plan which shall be provided by ActaMed to such Hired Employees without any 
limitations based upon pre-existing conditions effective (i) for Hired 
Employees and their dependents, as of the first day of the month following 
the Closing Date and (ii) for Hired Hold-Over Employees and their dependents, 
as of the
                                     - xxxiv -

<PAGE>

later of the Hired Hold-Over Employee's initial date of employment with the 
Company or the first day of the month following the Closing Date.

     6.6   OTHER OFFERS AND EXCLUSIVE DEALING.  Unless and until this 
Agreement is terminated prior to Closing pursuant to ARTICLE 10, UHC shall 
not, acting in any capacity, directly or indirectly, through any officer, 
director, employee, agent or otherwise of the UHC or any member of the UHC 
Group, (a) solicit, initiate or encourage submission of proposals or offers 
from any person, corporation or other entity relating to any purchase of the 
Shares, or any merger, sale of substantial assets or similar transaction 
involving the Company or the Company Business, (b) participate in any 
discussions or negotiations regarding, or, except as required by a legal or 
judicial process, furnish to any other person, corporation or other entity 
any information with respect to, or otherwise cooperate in any way with, or 
assist or participate in, facilitate or encourage, any effort or attempt by 
any other person, corporation or other entity to purchase the Shares, or 
engage in a merger, purchase of substantial assets or similar transaction 
involving the Company or the Company Business, or (c) approve or undertake 
any such transaction.  UHC shall promptly communicate to ActaMed and SubCorp 
the terms of any such proposal or offer upon knowledge or receipt of such 
proposal or offer.

     6.7   CERTAIN TAX MATTERS.  UHC shall cause all Tax returns of the 
Company required to be filed on or before the Closing Date, taking into 
account any extensions of the filing deadlines granted to the Company that 
had not yet been filed prior to the date hereof (including those relating to 
periods after the Closing Date), to be prepared by the Company but not to be 
filed without prior examination by or on behalf of ActaMed and SubCorp.

     6.8   CONSENTS AND APPROVALS.  The Company and UHC agree to use their 
best efforts to obtain the waiver, consent and approval of all persons whose 
waiver, consent or approval (a) is required in order to consummate the 
transactions contemplated by this Agreement, or (b) is required by any 
Contract, Court Order or License to which the Company or UHC is a party or 
subject on the Closing Date, and (1) which would prohibit, or require the 
waiver, consent or approval of such transactions, or (2) under which such 
transactions would, without such waiver, consent or approval, constitute a 
Default under the provisions thereof, result in the acceleration of any 
obligation thereunder, or give rise to a right of any party thereto to 
terminate its obligations thereunder.  All written waivers, consents and 
approvals obtained by UHC and the Company shall be produced at the Closing in 
form and content reasonably satisfactory to ActaMed and SubCorp.

     6.9   QUALIFICATION AND CORPORATE EXISTENCE.  The Company shall deliver to
ActaMed and SubCorp (a) a certificate of the Secretary of State of the State of
Nevada, dated as of a date no more than ten (10) business days prior to the
Closing Date, stating that the Company is a corporation in good standing under
the laws of such state and has paid all applicable franchise or other fees and
taxes due to such state and (b) certificates of the appropriate officials of the
State of Minnesota, all dated as of a date no more than 

                                    - xxxv -

<PAGE>

ten (10) business days prior to the Closing Date, stating that the Company is 
duly qualified and in good standing to transact business as a foreign 
corporation as stated in SECTION 4.3 of this Agreement in such state and has 
paid all applicable franchise or other fees and taxes due to each such state.

     6.10  PUBLIC ANNOUNCEMENTS.  Each party hereto agrees that neither it, 
nor or any of its representatives, shall make any public announcement with 
respect to this Agreement or the transactions contemplated hereby without the 
prior consent of the other parties hereto unless required by law or judicial 
process, in which case notification shall be given to the other parties 
hereto prior to such disclosure.

     6.11  CONFIDENTIALITY.

           (a) Each party hereto agrees not to use, copy or disclose the 
trade secrets of any other party, except as permitted by this Agreement.  
Each party shall treat any other's trade secrets with at least that degree of 
care it uses with respect to its own such trade secrets.  Each party will 
give access to any other party's trade secrets only to such of its personnel 
as have a need to such access and to no other person whatsoever.  The 
requirements herein contained with respect to non-disclosure and non-use and 
protection of each party's trade secrets shall permanently survive 
termination of any other provisions of this Agreement.  If any party is 
ordered by a court, administrative agency, or other governmental body of 
competent jurisdiction to disclose trade secrets, or if it is served with or 
otherwise becomes aware of a motion or similar request that such an order be 
issued, then such party will not be liable to the other party for disclosure 
of trade secrets required by such order if the disclosing party complies with 
the following requirements:  (1) if an already issued order calls for 
immediate disclosure, then the disclosing party shall immediately move for or 
otherwise request a stay of such order to permit the other party to respond; 
(2) the disclosing party promptly notifies the other party of the motion or 
order; and (3) the disclosing party not oppose a motion or similar request by 
the other party for an order protecting the trade secrets including joining 
or agreeing to (or non-opposition to) a motion for leave to intervene by such 
other party.

           (b) The term "TRADE SECRETS" means information related to a party 
(1) which derives economic value, actual or potential, from not being 
generally known to or readily ascertainable by other persons who can obtain 
economic value from its disclosure or use, and (2) which is the subject of 
efforts by said party that are reasonable under the circumstances to maintain 
its secrecy.

     6.12  COVENANT NOT TO COMPETE.  UHC hereby acknowledges and agrees that 
the exclusivity and noncompetition provisions of the Services and License 
Agreement are an important and substantial part of the consideration to 
ActaMed for the consummation of the transactions contemplated hereby, and the 
parties hereby incorporate by reference those provisions of the Services and 
License Agreement.

                                    - xxxvi -

<PAGE>

     6.13  CLOSING CONDITIONS.  ActaMed, SubCorp, the Company and UHC each 
agree to use its best efforts to satisfy the closing conditions set forth in 
ARTICLES 1, 7 and 8 of this Agreement.

     6.14  EXPENSES.  Except as otherwise provided herein and except that UHC 
shall pay all of the expenses of the Company (including, but not limited to, 
the audit by Deloitte & Touche, LLP of the books and records of the Company 
and the Company Business), the parties to this Agreement shall each bear its 
respective expenses incurred in connection with the preparation, execution 
and performance of this Agreement and the transactions contemplated hereby, 
including, without limitation, all fees and expenses of agents, 
representatives, counsel and accountants.

     6.15  REPAYMENT OF DEBTS TO COMPANY.  On or before the Closing Date, all 
loans and advances from the Company to any member of the UHC Group, whether 
or not disclosed in SCHEDULE 4.27, shall be repaid to the Company in full and 
the Company shall have delivered to ActaMed and SubCorp appropriate 
instruments or writings to evidence the receipt of such repayments, and all 
guaranties by the Company of loans obtained by any member of the UHC Group, 
from third parties shall have been released.  

     6.16  COMPLIANCE WITH REGULATION D.  ActaMed shall file five copies of a 
notice on SEC Form D no later than fifteen (15) days after the execution of 
this Agreement.

     6.17  VOTING FOR MERGER.  UHC agrees to vote for and approve the Merger 
and the transactions contemplated by this Agreement and waives its 
dissenter's rights under the General Corporation Law of the State of Nevada.

     6.18   ANTITRUST NOTIFICATION.  Each of the parties will promptly file 
with the United States Federal Trade Commission and the United States 
Department of Justice the notification and report form required for the 
transactions contemplated hereby and any supplemental or additional 
information which may reasonably be requested in connection therewith 
pursuant to the HSR Act and will comply in all material respects with the 
requirements of the HSR Act.  UHC and ActaMed shall each pay fifty percent 
(50%) of the applicable filing fees.

     6.19  REVIEW OF REGISTRATION STATEMENT.  ActaMed shall give UHC the 
opportunity to review and comment upon those portions of any Registration 
Statement or amendment thereto prepared by ActaMed in connection with a 
proposed initial public offering which describe UHC and ActaMed's 
relationship therewith, prior to filing such Registration Statement or 
amendment thereto with the Securities and Exchange Commission, and shall 
cooperate with UHC and use its reasonable efforts to accommodate the 
reasonable comments of UHC. 

     6.20  ESCROW OF SOFTWARE.  On the Closing Date, the Company shall deliver
to one copy of the Software to Fort Knox (the "ESCROW AGENT"), which copy shall
serve as a 

                                  - xxxvii -

<PAGE>

prototype of the Software delivered to ActaMed on the Closing Date and which 
copy shall be made available to UHC for the defense of any claims by ActaMed 
or others regarding the functionality and performance of the Software.

                                     ARTICLE 7
             CONDITIONS PRECEDENT TO OBLIGATIONS OF ACTAMED AND SUBCORP

     The obligations of ActaMed and SubCorp to consummate the transactions 
contemplated by this Agreement shall be subject to the satisfaction, on or 
before the Closing Date, of each and every one of the following conditions, 
all or any of which may be waived, in whole or in part, by ActaMed and 
SubCorp for purposes of consummating such transactions, but without prejudice 
to any other right or remedy which ActaMed and SubCorp may have hereunder as 
a result of any misrepresentation by, or breach of any agreement, covenant or 
warranty of, UHC or the Company contained in this Agreement or any schedule, 
certificate or instrument furnished or caused to be furnished by UHC or the 
Company hereunder.

     7.1   REPRESENTATIONS TRUE AND COVENANTS PERFORMED AT CLOSING. The 
representations and warranties made by UHC or the Company in the UHC 
Documents shall be true and correct in all material respects as of the 
Closing Date, with the same force and effect as if such representations and 
warranties had been made on and as of the Closing Date.

     7.2   COVENANTS.  All of the terms, covenants and conditions in the UHC 
Documents to be complied with or performed by UHC or the Company on or prior 
to the Closing shall have been complied with and performed in all material 
respects.

     7.3   NO INJUNCTION, ETC.  No action, proceeding, investigation, 
Regulation or legislation shall have been instituted, threatened or proposed 
before any court, governmental agency or legislative body to enjoin, 
restrain, prohibit, or obtain substantial damages in respect of, or which is 
related to, or arises out of, this Agreement or the consummation of the 
transactions contemplated hereby, or which is related to or arises out of the 
Company Business, if such action, proceeding, investigation, regulation or 
legislation, in the reasonable judgment of ActaMed and SubCorp, would make it 
inadvisable to consummate such transactions.

     7.4   APPROVAL OF LEGAL MATTERS.  All actions, proceedings, instruments 
and documents deemed necessary or appropriate by ActaMed and SubCorp or their 
counsel to effectuate this Agreement and the consummation of the transactions 
contemplated hereby, or incidental thereto, and all other related legal 
matters, shall have been approved by such counsel.

                                    - xxxviii -


<PAGE>


     7.5   GOVERNMENTAL APPROVALS.  All governmental and other consents and
approvals, if any, necessary to permit the consummation of the transactions
contemplated by this Agreement shall have been received by ActaMed and SubCorp.

     7.6   NO MATERIAL ADVERSE CHANGE.  There shall not have been any material
adverse change in the financial condition, operating results or assets of the
Company or EDI between the date of the EDI Financial Statements and the Closing
Date, and UHC shall have delivered to ActaMed a certificate dated as of the
Closing Date certifying to such effect.


                                     ARTICLE 8
                              CONDITIONS PRECEDENT TO 
                       THE OBLIGATIONS OF UHC AND THE COMPANY

     The obligations of UHC and the Company to consummate the transactions 
contemplated by this Agreement shall be subject to the satisfaction, on or 
before the Closing Date, of each and every one of the following conditions, 
all or any of which may be waived, in whole or in part, by UHC and the 
Company for purposes of consummating such transactions, but without prejudice 
to any other right or remedy which they may have hereunder as a result of any 
misrepresentation by, or breach of any agreement, covenant or warranty of 
ActaMed or SubCorp contained in this Agreement, or any certificate or 
instrument furnished by it hereunder.

     8.1   REPRESENTATIONS TRUE AND COVENANTS PERFORMED AT CLOSING.  The
representations and warranties made by ActaMed or SubCorp in the ActaMed
Documents shall be true and correct in all material respects as of the Closing
Date, with the same force and effect as if such representations and warranties
had been made on and as of the Closing Date. 

     8.2   COVENANTS.  All of the terms, covenants and conditions in the ActaMed
Documents to be complied with or performed by ActaMed or SubCorp on or prior to
the Closing shall have been complied with and performed in all material
respects.

     8.3   NO INJUNCTION, ETC.  No action, proceeding, investigation, Regulation
or legislation shall have been instituted, threatened or proposed before any
court, governmental agency or legislative body to enjoin, restrain, prohibit, or
obtain substantial damages in respect of, or which is related to, or arises out
of, this Agreement or the consummation of the transactions contemplated hereby,
or which is related to or arises out of the business of ActaMed or SubCorp, if
such action, proceeding, investigation, Regulation or legislation, in the
reasonable judgment of UHC, would make it inadvisable to consummate such
transactions.

     8.4   APPROVAL OF LEGAL MATTERS.  All actions, proceedings, instruments and
documents deemed necessary or appropriate by UHC or their counsel to effectuate
this 


                                    -xxxix-

<PAGE>

Agreement and the consummation of the transactions contemplated hereby, or
incidental hereto, and all other related legal matters, shall have been approved
by such counsel.

     8.5   GOVERNMENTAL APPROVALS.  All governmental and other consents and
approvals, if any, necessary to permit the consummation of the transactions
contemplated by this Agreement shall have been received by UHC and the Company.

     8.6   NO MATERIAL ADVERSE CHANGE.  There shall not have been any material
adverse change in the financial condition, operating results or assets of
ActaMed between the date of the ActaMed Financial Statements and the Closing
Date, and ActaMed shall have delivered to UHC a certificate dated as of the
Closing Date certifying to such effect.


                                     ARTICLE 9
                          SURVIVAL OF REPRESENTATIONS AND
                           WARRANTIES AND INDEMNIFICATION

     9.1   SURVIVAL OF REPRESENTATIONS AND WARRANTIES OF UHC AND THE COMPANY. 
ActaMed, SubCorp, UHC and the Company acknowledge and agree that, as
contemplated by SECTION 6.2, prior to the Closing Date, ActaMed and SubCorp
intend to perform such investigation of the Company as they may deem
appropriate; provided, however, no investigation by ActaMed and SubCorp shall
diminish or otherwise affect any of the representations, warranties, covenants
or agreements made or to be performed by UHC or the Company pursuant to this
Agreement or ActaMed's and SubCorp's right to rely fully upon such
representations, warranties, covenants and agreements.  All such
representations, warranties, covenants and agreements made or to be performed by
UHC or the Company pursuant to this Agreement shall survive the execution and
delivery hereof and the Closing hereunder.  The representations and warranties
shall thereafter terminate and expire (a) with respect to any General Claim with
respect to which a Claims Notice has not been given, on the later of (i)
eighteen months after the Closing Date or (ii) the first anniversary of the date
on which such covenant is to be performed hereunder; and (b) with respect to any
Tax Claim, on the later of (i) the ninetieth (90th) day after the date upon
which the Liability to which any such Tax Claim may relate is barred by all
applicable statutes of limitation and (ii) the ninetieth (90th) day after the
date upon which any claim for refund or credit related to such Tax Claim is
barred by all applicable statutes of limitation.  With respect to any Ownership
Claim, Undisclosed Liability Claim or any type of claim not specifically
addressed above, such representations, warranties, covenants and agreements
shall survive without limit of time.  

     9.2   SURVIVAL OF REPRESENTATIONS AND WARRANTIES OF ACTAMED AND SUBCORP. 
Except for the covenants and agreements contained in ARTICLES 12 and 13, which
shall survive termination of this Agreement in accordance with their respective
terms, all the representations, warranties, covenants and agreements, made or to
be performed by ActaMed and SubCorp pursuant to this Agreement shall be
considered to have been relied upon by UHC and shall survive the delivery to UHC
of the Preferred 


                                      -xl-

<PAGE>


Shares (and the Conversion Shares) and shall terminate and expire, with 
respect to any Claim for which a Claims Notice has not been given, on the 
first anniversary of the Closing Date.

     9.3   OBLIGATION OF UHC TO INDEMNIFY.  Subject to the limitations of
SECTIONS 9.1 and 9.8, UHC agrees to indemnify and hold harmless each ActaMed
Indemnitee against and in respect of:

           (a) all Losses, asserted against, imposed upon or incurred by any
ActaMed Indemnitee by reason of or resulting from:

               (1)  a breach of any representation or warranty of UHC or the
Company contained in or made pursuant to this Agreement; or 

               (2)  any nonfulfillment of any covenant or agreement of UHC or
the Company contained in or made pursuant to this Agreement;
               
           (b) any and all actions, suits, claims, proceedings, investigations,
demands, assessments, audits, fines, judgments, costs and other expenses
(including, without limitation, reasonable legal fees and expenses) incident to
any Loss in connection with SECTION 9.3(a) or to the enforcement of this SECTION
9.3; 

           (c) all Losses asserted against, imposed upon or incurred by any
ActaMed Indemnitee by reason or resulting from:

               (1)  any and all costs, judgments, claims, actions at law or in
equity, interest charges and reasonable attorneys' fees with respect to any
cause of action or proceeding, by any participant or dependent or beneficiary of
any participant, arising out of or by reason of the sponsorship by any member of
the UHC Group of any Benefit Plan prior to the Effective Time;

               (2)  any Environmental Condition, and arising out of or in
connection with any event or events which occurred prior to the Effective Time;
and

               (3)  any Litigation pending or threatened as of the Closing Date,
or Litigation arising out of events which occurred prior to the Effective Time,
against or affecting the Company regardless of whether it is disclosed on
SCHEDULE 4.20 or any other Schedule attached to ARTICLE 4 hereto.

     9.4   OBLIGATION OF ACTAMED AND SUBCORP TO INDEMNIFY.  Subject to the
limitations of SECTIONS 9.1 and 9.8, ActaMed and SubCorp agree to indemnify and
hold harmless each UHC Indemnitee against and in respect of:

           (a) all Losses asserted against, imposed upon or incurred by any UHC
Indemnitee by reason of or resulting from:


                                     -xli-

<PAGE>


               (1)  a breach of any representation or warranty of ActaMed or
SubCorp contained in or made pursuant to this Agreement; or 

               (2)  any nonfulfillment of any covenant or agreement of the
ActaMed or SubCorp contained in or made pursuant to this Agreement; and
               
           (b) any and all actions, suits, claims, proceedings, investigations,
demands, assessments, audits, fines, judgments, costs and other expenses
(including, without limitation, reasonable legal fees and expenses) incident to
any Loss in connection with SECTION 9.4(a) or to the enforcement of this SECTION
9.4.

     9.5   CLAIMS NOTICE.  A Claim shall be made by any Indemnitee by delivery
of a Claims Notice to any Indemnifying Party requesting indemnification and
specifying the basis on which indemnification is sought and the amount of
asserted Losses and, in the case of a Third Party Claim, containing (by
attachment or otherwise) such other information as such Indemnitee shall have
concerning such Third Party Claim.  
           
     9.6   PROCEDURES INVOLVING NON-THIRD PARTY CLAIMS.  If the Claim 
involves a matter other than a Third Party Claim, the Indemnifying Party 
shall have forty-five (45) days to object to such Claim by delivery of a 
written notice of such objection to such Indemnitee specifying in reasonable 
detail the basis for such objection.  If an objection is timely interposed by 
the Indemnifying Party, the Indemnifying Party and the Indemnitee shall 
cooperate in the compromise of the Claim.  Failure to object in a timely 
manner shall constitute a final and binding acceptance of the Claim by the 
Indemnifying Party on behalf of all Indemnitors, and the Claim shall be paid 
in accordance with SECTION 9.10 hereof.
           
     9.7   PROCEDURES INVOLVING THIRD PARTY CLAIMS.  

     The obligations and liabilities of the parties hereunder with respect to a
Third Party Claim shall be subject to the following terms and conditions:

           (a) The Indemnitee shall give the Indemnifying Party written notice
of a Third Party Claim promptly after receipt by the Indemnitee of notice
thereof, and the Indemnifying Party may undertake the defense, compromise and
settlement thereof by representatives of its own choosing reasonably acceptable
to the Indemnitee.  The failure of the Indemnitee to notify the Indemnifying
Party of such claim shall not relieve the Indemnifying Party of any liability
that they may have with respect to such claim except to the extent the
Indemnifying Party demonstrates that the defense of such claim is prejudiced by
such failure.  The assumption of the defense, compromise and settlement of any
such Third Party Claim by the Indemnifying Party shall be an acknowledgment of
the obligation of the Indemnifying Party to indemnify the Indemnitee with
respect to such claim hereunder.  If the Indemnitee desires to participate in,
but not control, any such defense, compromise and settlement, it may do so at
its sole cost and expense.  If, 


                                       -xlii-

<PAGE>


however, the Indemnifying Party fails or refuses to undertake the defense of 
such Third Party Claim within ten (10) days after written notice of such 
claim has been given to the Indemnifying Party by the Indemnitee, the 
Indemnitee shall have the right to undertake the defense, compromise and 
settlement of such claim with counsel of its own choosing. In the 
circumstances described in the preceding sentence, the Indemnitee shall, 
promptly upon its assumption of the defense of such claim, make a Claim as 
specified in SECTION 9.5 which shall be deemed a Claim that is not a Third 
Party Claim for the purposes of the procedures set forth herein.

           (b) If, in the reasonable opinion of the Indemnitee, any Third 
Party Claim or the litigation or resolution thereof involves an issue or 
matter which could have a material adverse effect on the business, 
operations, assets, properties or prospects of the Indemnitee (including, 
without limitation, the administration of the tax returns and 
responsibilities under the tax laws of the Indemnitee), the Indemnitee shall 
have the right to control the defense, compromise and settlement of such 
Third Party Claim undertaken by the Indemnifying Party, and the reasonable 
costs and expenses of the Indemnitee in connection therewith shall be 
included as part of the indemnification obligations of the Indemnifying Party 
hereunder.  If the Indemnitee shall elect to exercise such right, the 
Indemnifying Party shall have the right to participate in, but not control, 
the defense, compromise and settlement of such Third Party Claim at its sole 
cost and expense.

           (c) No settlement of a Third Party Claim involving the asserted
liability of the Indemnifying Party under this Article shall be made without the
prior written consent by or on behalf of the Indemnifying Party, which consent
shall not be unreasonably withheld or delayed.  If the Indemnifying Party
assumes the defense of such a Third Party Claim, (1) no compromise or settlement
thereof may be effected by the Indemnifying Party without the Indemnitee's
consent unless (A) there is no finding or admission of any violation of law or
any violation of the rights of any person and no effect on any other claim that
may be made against the Indemnitee (B) the sole relief provided is monetary
damages that are paid in full by the Indemnifying Party and (C) the compromise
or settlement includes, as an unconditional term thereof, the giving by the
claimant or the plaintiff to the Indemnitee of a release, in form and substance
satisfactory to the Indemnitee, from all liability in respect of such Third
Party Claim, and (2) the Indemnitee shall have no liability with respect to any
compromise or settlement thereof effected without its consent.
           
     9.8   LIMITATIONS ON INDEMNIFICATION.  

           (a) No party to this Agreement shall be entitled to indemnification
under this Agreement to the extent that such party's Losses are increased or
extended by the willful misconduct, violation of law or bad faith of such party.

           (b) No Indemnifying Party shall be required to indemnify an
Indemnitee with respect to any Loss arising out of or with respect to a General
Claim unless the amount of such Loss, when aggregated with all other such
Losses, shall exceed 


                                     -xliii-

<PAGE>


the Threshold Amount (as defined below), at which time Claims may be asserted 
to the extent that all Losses or Asserted Liabilities are in excess of the 
Threshold Amount; provided, however, that the Threshold Amount shall not 
apply to any Loss: (A) which results from or arises out of an Ownership 
Claim, Tax Claim or Undisclosed Liability Claim, (B) which results from or 
arises out of fraud or intentional misrepresentation or an intentional breach 
of a representation, warranty, covenant or agreement in this Agreement; or 
(C) which results from or arises out of any Litigation incident to any of the 
matters referred to in the foregoing clauses (A) and (B).  The Threshold 
Amount shall be One Hundred Thousand Dollars ($100,000).  Notwithstanding the 
foregoing, for any breach of SECTION 4.13, UHC shall indemnify each ActaMed 
Indemnitee for any individual Loss in excess of $10,000 per item of tangible 
personal property and any aggregate Loss exceeding $50,000 for items of 
tangible personal property.

           (c) In no event shall the aggregate liability of the Indemnifying
Party for any General Claim under this ARTICLE 9 exceed $10 million.

     9.9   NO RELEASE FOR FRAUD.  Nothing contained in this Agreement shall
relieve or limit the liability of any party or any officer or director of such
party from any Liability arising out of or resulting from common law fraud or
intentional misrepresentation in connection with the transactions contemplated
by this Agreement or in connection with the delivery of any of the Transaction
Documents.  Each party shall have a right to indemnification for any Loss
incurred as the result of any common law fraud or intentional misrepresentation
by any other party or any officer or director of such other party without regard
to the Threshold Amount, the maximum liability or any period of limitation.

     9.10  PAYMENT.

           (a) If any party is required to make any payment under this
ARTICLE 9, such party shall promptly pay the Indemnified Party the amount so
determined.  If there is a dispute as to the amount or manner of determination
of any indemnity obligation owed under this ARTICLE 9, the Indemnifying Party
shall nevertheless pay when due such portion, if any, of the obligation as shall
not be subject to dispute.  The difference, if any, between the amount of the
obligation ultimately determined as properly payable under this ARTICLE 9 and
the portion, if any, theretofore paid shall bear interest as provided in 
SECTION 9.10(c).

           (b) Any items as to which an Indemnified Party is entitled to payment
under this ARTICLE 9 may be paid by set-off against amounts payable to the
Indemnifying Party to the extent that such amounts are sufficient to pay such
items.

           (c) If all or part of any indemnification obligation under this
Agreement is not paid when due, then the Indemnifying Party shall pay the
Indemnified Party interest on the unpaid principal amount of the obligation from
the date the amount 


                                      -xliv-

<PAGE>


became due until payment in full, at the per annum rate of interest announced 
from time to time by NationsBank South, N.A., to be its "prime rate."

     9.11  EXCLUSIVE REMEDY.  Except for equitable remedies and any action for
common law fraud, the remedies provided in this ARTICLE 9 constitute the sole
and exclusive remedies for recovery against the Indemnifying Party based upon
this Agreement.

     9.12  ARBITRATION.  All disputes arising under this ARTICLE 9 (other than
claims in equity) shall be resolved by arbitration in accordance with the
Commercial Arbitration Rules of the American Arbitration Association. 
Arbitration shall be by a single arbitrator experienced in the matters at issue
and selected by UHC and ActaMed in accordance with the Commercial Arbitration
Rules of the American Arbitration Association.  The arbitration shall be held in
such place in Atlanta, Georgia as may be specified by the arbitrator (or any
place agreed to by UHC, ActaMed and the arbitrator).  The decision of the
arbitrator shall be final and binding as to any matters submitted under this
ARTICLE 9; provided, however, if necessary, such decision and satisfaction
procedure may be enforced by either UHC or ActaMed in any court of record having
jurisdiction over the subject matter or over any of the parties to this
Agreement.  All costs and expenses incurred in connection with any such
arbitration proceeding (including reasonable attorneys' fees) shall be borne by
the party against which the decision is rendered, or, if no decision is
rendered, such costs and expenses shall be borne equally by the Indemnifying
Party as one party and the Indemnitees as the other party.  If the arbitrator's
decision is a compromise, the determination of which party or parties bears the
costs and expenses incurred in connection with any such arbitration proceeding
shall be made by the arbitrator on the basis of the arbitrator's assessment of
the relative merits of the parties' positions.

                                     ARTICLE 10
                                    TAX MATTERS

     10.1.  TAX INDEMNITIES.  

           (a) From and after the Closing Date, UHC shall indemnify ActaMed and
the Company against all Taxes (i) imposed on the Company with respect to any
taxable period or portion thereof that ends before or on (but includes) the
Closing Date (ii) imposed on UHC or any member of an affiliated group with which
UHC files a consolidated or combined income tax return (other than the Company)
with respect to any taxable period. 

           (b) From and after the Closing Date, ActaMed and Company shall
indemnify UHC against all Taxes imposed on the Company with respect to its
income, business, property or operations for any taxable period or portion
thereof that begins after the Closing Date.


                                      -xlv

<PAGE>


           (c) For purposes of Sections 10.01(a) and (b), in the case of 
Taxes that are payable with respect to a taxable period that begins before 
the Closing Date and ends after the closing Date, the portion of any such Tax 
that is allocable to the portion of the period ending on the Closing Date 
shall:  (i) in the case of Taxes that are either (x) based upon or related to 
income or receipts of (y) imposed in connection with any sale, other transfer 
or assignment or any deemed sale, transfer or assignment of property (real or 
personal, tangible or intangible), be deemed equal to the amount which would 
be payable if the taxable year ended on the Closing Date, and (ii) in the 
case of Taxes imposed on a periodic basis with respect to the assets of the 
Company or otherwise measured by the level of any item, be deemed to be the 
amount of such Taxes for the entire period (or, in the case of such Taxes 
determined on an arrears basis, the amount of such Taxes for the immediately 
preceding period) multiplied by a fraction the numerator of which is the 
number of calendar days in the portion of such period ending on the Closing 
Date and the denominator of which is the number of calendar days in the 
entire period.  For purposes of clause (i) above, any exemption, deduction, 
credit or other item that is calculated on an annual basis shall be allocated 
to the period beginning before the Closing Date and, pursuant to clause (i) 
treated as ending on the Closing Date, based on the pro rata portion of such 
item determined by multiplying the total amount of such item times a 
fraction, the numerator of which is the number of calendar days in the period 
up to and including the Closing Date and the denominator of which is the 
total number of calendar days in the entire period.

     10.2. RETURNS AND PAYMENTS.

           (a) From the date of this Agreement through and after the Closing
Date, UHC shall prepare and file or otherwise furnish to the appropriate party
(or cause to be prepared and filed or so furnished) in a timely manner all Tax
returns, reports and forms ("RETURNS") with respect to the Company for any
taxable period ending on or before the Closing Date, and ActaMed shall do the
same for any taxable period ending after the Closing Date.  With respect to any
Return required to be filed with respect to the Company after the Closing Date
and as to which an amount of Tax is allocable to UHC under Section 10.01(c),
ActaMed shall provide UHC and its authorized representatives with a copy of such
completed Return and a statement (including all necessary supporting schedules
and information required to support such statement) that certifies and sets
forth the calculation of the amount of Tax shown on such Return that is
allocable to UHC pursuant to Section 10.01(c) at least 30 days prior to the due
date (including any extension thereof) for the filing of such Return, and UHC
and its authorized representatives shall have the right to review such Return
and statement (including any supporting Schedules or other documents relevant
thereto) prior to the filing of such Return.  UHC and ActaMed agree to consult
and to attempt in good faith to resolve any issues arising as a result of the
review of such Return and statement by UHC or its authorized representatives.

                                      -xlvi-

<PAGE>


           (b) UHC and ActaMed shall each pay or cause to be paid when due and
payable all Taxes that have not been paid as of the Closing Date that are
allocable to them pursuant to the provisions of Section 10.01.

           (c) Payment of any amounts due under this Article 10 shall be made
(i) with respect to agreed amounts, at least three calendar days before the
payment of any such Tax is due, provided that no such payment shall be due prior
to 10 business days following receipt of written notice that payment of such Tax
is due, or (ii) within 10 business days following either an agreement between
UHC and ActaMed that an amount is payable by UHC or ActaMed to the other or
within 10 business days of a "determination" as defined in section 1313(a) of
the Internal Revenue Code.

     10.3  TAX AUDIT

           (a) After the Closing, ActaMed shall promptly notify UHC in writing
of the commencement of any Tax audit or administrative or judicial proceeding
and shall also separately notify UHC in writing of any demand or claim on
ActaMed or the Company which, if determined adversely to the taxpayer or after
the lapse of time would be grounds for indemnification by UHC under this Article
10.  Such notice shall contain factual information (to the extent known to
ActaMed or the Company) describing the asserted Tax liability in reasonable
detail and shall include copies of any notice or other document received from
any taxing authority in respect of any such asserted Tax liability.  If ActaMed
fails to give UHC prompt notice of an asserted Tax liability as required by this
Section 10.03, then (a) if UHC is precluded by the failure to give prompt notice
from contesting the asserted Tax liability in the appropriate administrative or
judicial forums, then UHC shall not have any obligation to indemnify ActaMed for
any loss or damage arising out of such asserted Tax liability, and (b) if UHC is
not so precluded from contesting but such failure to give prompt notice results
in a detriment to UHC, then any amount which UHC is otherwise required to pay
ActaMed pursuant to this Article 10 with respect to such liability shall be
reduced by the amount of such detriment.

           (b) UHC may elect to direct, through counsel of its own choosing and
at its own expense, any audit, or administrative or judicial proceeding
involving any asserted liability with respect to which indemnity may be sought
under this Article 10 (any such audit or proceeding relating to an asserted Tax
liability are referred to herein collectively as a "CONTEST").  If UHC elects to
direct the Contest of an asserted Tax liability, it shall within 30 calendar
days of receipt of the notice of an asserted Tax liability notify ActaMed of its
intent to do so, and ActaMed shall cooperate in good faith and shall cause the
Company or its successor to cooperate in good faith, at UHC's expense, in each
phase of such Contest.  If UHC elects not to direct the Contest, fails to notify
ActaMed of its election as herein provided or contests its obligation to
indemnify under Section 10.01, ActaMed or the Company may pay, compromise or
contest, at its own expense, such asserted liability.  However, in such case,
neither ActaMed nor the Company (including any designated representative of
either) may settle or compromise any asserted liability over the objection of
UHC; PROVIDED, HOWEVER, that UHC's consent 


                                      -xlvii-


<PAGE>


to settlement or compromise shall not be unreasonably withheld.  In any 
event, each of ActaMed (or the Company) and UHC may participate, at its own 
expense, in the Contest.  If UHC chooses to direct the Contest, ActaMed shall 
promptly empower and shall cause the Company or its successor promptly to 
empower (by power of attorney and such other documentation as may be 
appropriate) such representatives of UHC as it may designate to represent 
ActaMed or the Company or its successor in the Contest insofar as the Contest 
involves an asserted Tax liability for which UHC would be liable under this 
Article 10.

     10.4.  COOPERATION AND EXCHANGE OF INFORMATION.  UHC and ActaMed will
provide each other with such cooperation and information as either of them
reasonably may request of the other in filing any Tax return, amended return or
claim for refund, determining a liability for Taxes or a right to a refund of
Taxes or participating in or conducting any audit or other proceeding in respect
of Taxes.  Such cooperation and information shall include providing copies of
relevant Tax returns or portions thereof, together with accompanying schedules
and related work papers and documents relating to rulings or other
determinations by taxing authorities, but in no event shall UHC or ActaMed be
required to disclose to the other any information relating to the operations of
either, as the case may be, other than information relating to the Company.  The
Seller and ActaMed shall make its employees available on a mutually convenient
basis to provide explanations of any documents or information provided
hereunder.  UHC and ActaMed will retain all returns, schedules and work papers
and all material records or other documents relating to Tax matters of the
Company for its taxable period first ending after the Closing Date and for all
prior taxable periods until the later of:  (i) the expiration of the statute of
limitations of the taxable periods to which such returns and other documents
relate, without regard to extensions except to the extent notified by the other
party in writing of such extensions for the respective Tax periods; or (ii)
eight years following the due date (without extension) for such returns.  After
such time, before ActaMed shall dispose of any of such books and records, at
least 90 calendar days prior written notice to such effect shall be given by
ActaMed to UHC, and UHC shall be given an opportunity, at its cost and expense,
to remove and retain all or any part of such books and records as UHC may
select.  Any information obtained under this Section 10.05 shall be kept
confidential, except as may be otherwise necessary in connection with the filing
of returns or claims for refund or in conducting an audit or other proceeding.

     10.5. TAX SHARING AGREEMENTS.  UHC shall cause any tax-sharing agreements
or arrangements with the Company to be terminated as of the Closing Date, with
no amounts payable thereunder after the Closing other than those amounts payable
thereunder in respect of current tax payable accounts.

     10.6. ARTICLE 9.  The provisions of this Article 10 shall supersede the
provisions of Article 9 with respect to the matters set forth herein, except to
the extent explicitly referenced in this Article 10.

                                     ARTICLE 11



                                      -xlviii-

<PAGE>


                                    TERMINATION


     11.1  METHOD OF TERMINATION.  This Agreement and the transactions
contemplated by it may be terminated at any time prior to the Closing Date:

           (a) by the mutual consent of UHC and ActaMed;

           (b) by UHC, if ActaMed and SubCorp shall (1) fail to perform in any
material respect their agreements contained herein required to be performed by
any of them on or prior to the Closing Date, or (2) materially breach any of
their representations, warranties or covenants contained herein;

           (c) by ActaMed, if UHC or the Company shall (1) fail to perform in
any material respect their agreements contained herein required to be performed
by any of them on or prior to the Closing Date, or (2) materially breach any of
their representations, warranties or covenants contained herein;

           (d) by either UHC or ActaMed if there shall be any order, writ,
injunction or decree of any court or governmental or regulatory agency binding
on ActaMed, SubCorp, the Company or UHC, which prohibits or restrains ActaMed,
SubCorp, the Company and/or UHC from consummating the Merger, provided that
ActaMed, SubCorp, the Company and UHC shall have used their best efforts to have
any such order, writ, injunction or decree lifted and the same shall not have
been lifted within thirty (30) days after entry, by any such court or
governmental or regulatory agency;

           (e) pursuant to SECTION 11.4; or

           (f) without action of either party if the Closing has not occurred on
or before April 30, 1996.

     11.2  NOTICE OF TERMINATION.  Notice of termination of this Agreement, as
provided for in this ARTICLE 11, shall be given by the parties so terminating to
the other parties hereto in accordance with SECTION 14.1 of this Agreement.

     11.3  EFFECT OF TERMINATION.  If this Agreement terminates pursuant to 
SECTION 11.1 (a), (d), (e) or (f), then this Agreement shall become void and of
no further force and effect, and each party shall pay the costs and expenses
incurred by it in connection with this Agreement as set forth in SECTION 6.14
and no party (nor any of its officers, directors, employees, agents,
representatives or shareholders) shall be liable to any other party for any
costs, expenses, damages (direct or indirect) or loss of anticipated profits.

     11.4  RISK OF LOSS.  The Company and UHC assume all risk of condemnation,
destruction, loss or damage due to fire or other casualty from the date of this
Agreement until the Closing.  If the condemnation, destruction, loss, or damage
is such that the business of the Company is interrupted or curtailed or the
assets of the Company are 


                                      -xlix


<PAGE>


materially affected, then ActaMed and SubCorp shall have the right to 
terminate this Agreement.  If ActaMed and SubCorp nonetheless elect to close, 
the Company and UHC shall remit all net condemnation proceeds or third party 
insurance proceeds to ActaMed and SubCorp and the number of shares of Series 
C Preferred Stock to be delivered to UHC at the Closing shall be adjusted to 
reflect such condemnation, destruction, loss, or damage to the extent that 
insurance or condemnation proceeds are not sufficient to cover such 
destruction, loss or damage.  If ActaMed and SubCorp and UHC are unable to 
agree upon the amount of such adjustment, the dispute shall be resolved 
jointly by the independent accounting firms then employed by ActaMed and 
SubCorp and the Company, and if said accounting firms do not agree, they 
shall appoint a nationally recognized accounting firm, whose determination of 
the dispute shall be final and binding.

                                     ARTICLE 12
                          ADDITIONAL COVENANTS OF ACTAMED

     ActaMed covenants and agrees that, except as provided in SECTION 12.1
below, until such time as ActaMed has consummated a Public Offering:
     
     12.1  SECURITIES LAW FILINGS.  Upon consummation of a Public Offering and
for so long as the UHC holds the Conversion Shares, ActaMed will timely file the
reports required to be filed by it under the Securities Act and the Exchange Act
and the rules and regulations adopted by the SEC thereunder, to the extent
required from time to time to enable the UHC to sell the Conversion Shares
without registration under the Securities Act within the limitation of the
exemptions provided by (a) Rule 144 under the Securities Act, as such rule may
be amended from time to time, or (b) any similar rule or regulation hereafter
adopted by the SEC.  Upon the request of any UHC, ActaMed will deliver a written
statement as to whether it has complied with such requirements.
     
     12.2  TRANSACTIONS WITH SUBSTANTIAL HOLDERS.  ActaMed shall not, directly
or indirectly, knowingly enter into any material transaction or agreement with
any of its Substantial Holders or any Affiliate or officer of ActaMed or a
Substantial Holder, or a material transaction or agreement in which a
Substantial Holder or Affiliate or officer of ActaMed or a Substantial Holder
has a direct or indirect interest, unless such transaction or agreement is on
terms and conditions no less favorable to ActaMed or any of its Subsidiaries
than could be obtained at the time in an arm's length transaction with a third
person that is not such a Substantial Holder or Affiliate or officer of ActaMed
or a Substantial Holder, and such transaction or agreement has been reviewed and
approved by a majority of those members of ActaMed's Board of Directors who have
no such interest in the transaction.  Except as provided in SECTION 14.4, this
SECTION 12.2 shall not be enforceable against ActaMed by any person or entity
not a party to this Agreement.
     
     12.3  BUSINESS AND FINANCIAL COVENANTS.  ActaMed covenants that:


                                      -l-

<PAGE>


           (a) MERGER, ACQUISITIONS, SALE OF ASSETS.  Without the prior written
consent of the holders of a majority interest of the Series A Preferred Stock,
Series B Preferred Stock and the Series C Preferred Stock, each voting
separately as a class:
     
               (1)  ActaMed shall not merge, effect a statutory share exchange,
or consolidate with any entity at a price per preferred share less than the
Series C Conversion Price.

               (2)  ActaMed shall not sell, assign, lease or otherwise dispose
of all or substantially all of its assets (whether now owned or hereafter
acquired) in a transaction that would result in a price per preferred share less
than the Series C Conversion Price.

           (b) MERGER, ACQUISITIONS, SALE OF ASSETS.  Without the prior written
consent of the holders of a majority interest of the Series A Preferred Stock,
the Series B Preferred Stock and the Series C Preferred Stock, voting as a
single class:
     
               (1)  ActaMed shall not merge, effect a statutory share exchange,
or consolidate with any entity at a price per Preferred Share equal to or
greater than the Series C Conversion Price.

               (2)  ActaMed shall not sell, assign, lease or otherwise dispose
of all or substantially all of its assets (whether now owned or hereafter
acquired) in a transaction that would result in a price per preferred share
equal to or greater than the Series C Conversion Price.

               (3)  The Company shall not permit any of its Subsidiaries to
merge, effect a statutory share exchange, or consolidate with any entity other
than ActaMed, or to sell, assign, lease or otherwise dispose of, all or
substantially all of its assets (whether now owned or hereafter acquired) except
to ActaMed.

               (4)  Except for (A) up to 500,000 shares of ActaMed Common Stock
which may be issued pursuant to ActaMed's 1996 Stock Option Plan approved by the
Board of Directors, (B) up to 100,000 shares of ActaMed Common Stock which may
be issued pursuant to ActaMed's 1996 Directors Stock Option Plan approved by the
Board of Directors, (C) up to 975,000 shares of ActaMed Common Stock which may
be issued pursuant to ActaMed's 1995 Stock Option Plan approved by the Board of
Directors, (D) any remaining shares which may be issued under ActaMed's 1994
Stock Option Plan, 1993 Stock Option Plan and 1992 Stock Option Plan, (E) the
reissuance of any unvested options that terminate under such option plans,
(F) the issuance of shares of ActaMed Common Stock pursuant to additional stock
option plans that may be established from time to time by the Board of Directors
of ActaMed in its discretion, and (E) the conversion of the Series A Preferred
Stock, the Series B Preferred Stock and the Series C Preferred Stock, ActaMed
will not, and will not permit any of its Subsidiaries, to hereafter issue or
sell any shares of any securities convertible into, or any warrants, rights, 


                                      -li-


<PAGE>

or options to purchase shares of, the capital stock of ActaMed or such 
Subsidiary to any person or entity other than ActaMed, and ActaMed will not 
pledge any of the capital stock of any Subsidiary to any person or entity.

           (c) LOANS TO AND INVESTMENTS IN OTHERS.  ActaMed shall not (except
for the advancement of money for expenses in the ordinary course of business)
make, or permit any of its Subsidiaries to make, any loans or advances to any
person or entity or have outstanding any investment in any entity, whether by
way of loan or advance to, or by the acquisition of the capital stock, assets or
obligations of or any interest in, any person or entity.

           (d) RESTRICTED PAYMENTS, REPURCHASE OF ACTAMED COMMON STOCK.  Except
as expressly permitted herein or by the Restated Articles, neither ActaMed nor
any of its Subsidiaries shall declare or make any Restricted Payments.  

           (e) ARTICLES OF INCORPORATION.  Neither ActaMed nor any of its
Subsidiaries will amend or change its Articles of Incorporation or Bylaws, or
violate or breach any of the provisions thereof.

           (f) Without the consent of a majority of the Board of Directors:

               (1)  DEBT.  ActaMed shall not create, incur or suffer to exist,
or permit any Subsidiary to create, incur or suffer to exist, any debt other
than:
           
                    (A) debt existing on the date hereof and included in the 
                        ActaMed Financial Statements or incurred in the 
                        ordinary course of business between the date of the 
                        ActaMed Financial Statements and the date hereof, and 
                        any renewals or replacements of such debt not exceeding
                        the principal amount of the debt being replaced or 
                        renewed; and
     
                    (B) debt not in excess of $1,000,000 in the aggregate in 
                        any one calendar year.
               
               (2)  LEASE OBLIGATIONS.  ActaMed shall not create or suffer to
exist, or permit any Subsidiary to create or suffer to exist, any obligations
for the payment of rent for any property under leases or agreements to lease,
other than obligations for (A) the payment of rent which, in the aggregate, do
not exceed $1,000,000 annually and (B) payments under leases set forth on
SCHEDULE 5.21.

               (3)  ACQUISITIONS.  ActaMed shall not acquire, or permit any
Subsidiary to acquire, directly or indirectly, the assets of or equity interests
in any other business or entity, whether by purchase, merger consolidation or
otherwise in excess of $1,000,000.


                                      -lii-

<PAGE>


               (4)  PUBLIC OFFERING.  ActaMed shall not effect an initial public
offering of any equity securities, other than equity securities issued in a
merger, less than $15,000,000 at a per share price of less than 2.5 times the
then existing conversion price of the Series A Preferred Stock.
           
     12.4  CORPORATE EXISTENCE, BUSINESS, MAINTENANCE, INSURANCE.  
     
           (a) ActaMed will at all times preserve and keep in full force and
effect its corporate existence and rights and franchises deemed material to its
business and those of its Subsidiaries, except any Subsidiary of ActaMed may be
merged into ActaMed or another Subsidiary.

           (b) ActaMed shall engage solely in the business of developing
information networks and businesses closely related thereto.  ActaMed (and any
Subsidiary) will not purchase or acquire any property other than property useful
in and related to such business.

           (c) ActaMed will maintain or cause to be maintained in good repair,
working order and condition all properties used or useful in the business of
ActaMed and any Subsidiary and from time to time will make or cause to be made
all appropriate repairs, renewals and replacements thereof.  ActaMed and any
Subsidiary will at all times comply in all material respects with the provisions
of all material leases to which it is a party or under which it occupies
property so as to prevent any loss or forfeiture thereof or thereunder.

           (d) ActaMed will maintain or cause to be maintained, with financially
sound and reputable insurers, appropriate insurance with respect to its
properties and business and the properties and business of any Subsidiary
against loss or damage.
     
     12.5  PAYMENT OF TAXES, ETC.; ERISA.  

           (a) ActaMed will pay, and will cause any of its Subsidiaries to pay,
all taxes, assessments and other governmental charges imposed upon it or any of
its properties or assets or in respect of any of its franchises, business,
income or profits before any penalty or interest accrues thereon, and all claims
(including, without limitation, claims for labor, services, materials and
supplies) for sums which have become due and payable and which by law have or
might become a lien or charge upon any of its properties or assets, PROVIDED
that no such charge or claim need be paid if being contested in good faith by
appropriate proceedings and if such reserve or other appropriate provisions, if
any, as shall be required by generally accepted accounting principles shall have
been made therefor.

           (b) ActaMed and any of its Subsidiaries will comply in all material
respects with the ERISA.


                                      -liii-

<PAGE>


     12.6  BOOKS AND RECORDS, COMPLIANCE. 
     
           (a) ActaMed and any of its Subsidiaries will keep true records and
books of account in which full, true and correct entries will be made of all
dealings or transactions in relation to its business and affairs in accordance
with GAAP applied on a consistent basis.

           (b) ActaMed and any of its Subsidiaries shall duly observe and
conform in all material respects to all valid requirements of governmental
authorities relating to the conduct of its business or to its property or
assets.
     
     12.7  REPURCHASE OF PREFERRED SHARES.   Except as provided in the Restated
Articles, ActaMed shall not, and shall not permit any of its Subsidiaries or any
Affiliate of ActaMed to, directly or indirectly, redeem or repurchase or make
any offer to redeem or repurchase any Preferred Shares, unless ActaMed, such
Subsidiary or such Affiliate has offered to repurchase Preferred Shares PRO
RATA, from all holders of outstanding Preferred Shares) upon the same terms.
     
     12.8  COMPENSATION.   All awards of compensation, including, but not
limited to, salary, bonus and awards of stock options made to executive officers
and/or directors of ActaMed shall be determined by ActaMed in accordance with
the terms of the Stockholders' Agreement.
     
     
                                     ARTICLE 13
                        INFORMATIONAL COVENANTS OF ACTAMED 

     ActaMed covenants and agrees that it shall deliver the following
information to UHC (including permitted transferees in accordance with SECTION
14.4, except as set forth in SECTION 13.6), for so long as UHC (or such
transferees) shall hold at least 5% of the aggregate outstanding Preferred
Shares and Conversion Shares (considered as a single class), or until such time
as ActaMed shall have consummated a Public Offering:
     
     13.1  AUDITED ANNUAL FINANCIAL STATEMENTS.  As soon as practicable and, in
any case, within one hundred and twenty (120) days after the end of each fiscal
year, financial statements of ActaMed, consisting of the balance sheet of
ActaMed as of the end of such fiscal year and the statements of operations,
statements of shareholders, equity and statements of cash flows of ActaMed for
such fiscal year, setting forth in each case, in comparative form, the figures
for the preceding fiscal year, all in reasonable detail and fairly presented in
accordance with GAAP applied on a consistent basis throughout the periods
reflected therein, except as stated therein, and accompanied by an opinion
thereon of Deloitte & Touche, or other independent certified public accountants
selected by ActaMed of good and recognized national standing in the United
States.


                                      -liv-


<PAGE>

     13.2  QUARTERLY UNAUDITED FINANCIAL STATEMENTS.  As soon as practicable 
and, in any case, within forty-five (45) days after the end of each of the 
first three fiscal quarters in each fiscal year, unaudited financial 
statements of ActaMed setting forth the balance sheet of ActaMed at the end 
of each such fiscal quarter and the statements of operations and statements 
of cash flows of ActaMed for each such fiscal quarter and for the year to 
date, and setting forth in comparative form figures as of the corresponding 
date and for the corresponding periods of the preceding fiscal year, all in 
reasonable detail and certified by an accounting officer of ActaMed as 
complete and correct, as having been prepared in accordance with GAAP 
consistently applied (except as otherwise disclosed therein) and as 
presenting fairly, in all material respects, the financial position of 
ActaMed and any of its Subsidiaries and results of operations and cash flows 
thereof subject, in each case, to customary exceptions for interim unaudited 
financial statements.
     
     13.3  MONTHLY UNAUDITED FINANCIAL STATEMENTS.   As soon as available, 
but in any event within thirty (30) days after the end of each calendar 
month, copies of the unaudited balance sheet of ActaMed as at the end of such 
calendar month and the related unaudited statements of operations and cash 
flows for such calendar month and the portion of the calendar year through 
such calendar month, in each case setting forth in comparative form the 
figures for the corresponding periods of (a) the previous calendar year and 
(b) the budget for the current year, prepared in reasonable detail and in 
accordance with GAAP applied consistently throughout the periods reflected 
therein (except as otherwise disclosed therein) and certified by the chief 
financial officer of ActaMed as presenting fairly the financial condition and 
results of operations of ActaMed and any of its Subsidiaries (subject to 
customary exceptions for interim unaudited financial statements).
     
     13.4  MANAGEMENT'S ANALYSIS.  All the financial statements delivered 
pursuant to SECTIONS 13.1 and 13.2 shall be accompanied by an informal 
narrative description of material business and financial trends and 
developments and significant transactions that have occurred in the 
appropriate period or periods covered thereby.
     
     13.5  BUDGETS.  As soon as practicable, but in any event within thirty 
(30) days prior to the commencement of a fiscal year, an annual operating 
budget for such fiscal year, approved by the Board of Directors, including 
monthly income and cash flow projections and projected balance sheets as of 
the end of each quarter within such fiscal year.  Extensions of such due date 
shall not be unreasonably withheld.
     
     13.6  INSPECTION.  Upon reasonable notice, ActaMed shall, and shall 
cause any of its Subsidiaries to, permit UHC (so long as it owns 5% more of 
the outstanding capital stock of ActaMed) by its representatives, agents or 
attorneys:
     
           (a) to examine all books of account, records, reports and other 
papers of ActaMed or such Subsidiary except to the extent that such action 
would, in the reasonable opinion of counsel, constitute a waiver of the 
attorney/client privilege,


                                    -lv-
<PAGE>

           (b) to make copies and take extracts from any thereof, except for 
information which is confidential or proprietary,

           (c) to discuss the affairs, finances and accounts of ActaMed or such
Subsidiary with ActaMed's or such Subsidiary's officers and independent
certified public accountants (and by this provision ActaMed hereby authorizes
said accountants to discuss with UHC and its representatives, agents or
attorneys the finances and accounts of ActaMed or such Subsidiary), and

           (d) to visit and inspect, at reasonable times and on reasonable 
notice during normal business hours, the properties of ActaMed and such 
Subsidiary.  Notwithstanding any provision herein to the contrary, the 
provisions of this SECTION 13.6 are in addition to any rights of UHC under 
the Georgia Business Corporation Code and shall in no way limit such rights.

     The expenses of UHC in connection with any such inspection shall be for 
the account of UHC.  Notwithstanding the foregoing sentence, it is understood 
and agreed by ActaMed that all reasonable expenses incurred by ActaMed or 
such Subsidiary, any officers, employees or agents thereof or the independent 
certified public accountants therefor, shall be expenses payable by ActaMed 
and shall not be expenses of UHC making the inspection.
     
     Notwithstanding anything to the contrary, no member of the UHC Group 
shall be permitted access to any information of, or related to, any 
competitor of UHC.
     
     13.7  OTHER INFORMATION.  ActaMed shall deliver the following provided 
that in the reasonable opinion of counsel to ActaMed such disclosure will not 
constitute a waiver of the attorney/client privilege, the breach of any 
secrecy covenant or the release of information regarding competitors of UHC:
     
           (a) promptly after the submission thereof to ActaMed, copies of 
any detailed reports (including the auditors' comment letter to management, 
if any such letter is prepared) submitted to ActaMed by its independent 
auditors in connection with each annual or interim audit of the accounts of 
ActaMed made by such accountants;

           (b) promptly, and in any event within ten (10) days after 
obtaining knowledge thereof, notice of the institution of any suit, action or 
proceeding (other than a proceeding of general application which is not 
directly against ActaMed or one or more of the Subsidiaries), the happening 
of any event or, to the best knowledge of ActaMed, the assertion or threat of 
any claim against ActaMed or any of the Subsidiaries which, either 
individually or in the aggregate, would have a Material Adverse Effect;

           (c) promptly upon, and in any event within thirty (30) days after 
obtaining knowledge thereof, notice of any breach of, default under or 
failure to comply with any material term under SECTIONS 12 or 13 of this 
Agreement or any material adverse 


                                   -lvi-
<PAGE>

change in ActaMed's relationship with its major customers, suppliers, 
employees or other entity with which ActaMed has a business relationship;

           (d) with reasonable promptness, a notice of any default by ActaMed 
or any of its Subsidiaries under any material agreement to which it is a 
party;
     
           (e) with reasonable promptness, copies of all written materials 
furnished to directors;
     
           (f) promptly (but in any event within ten (10) days) after the 
filing of any document or material with the SEC, a copy of such document or 
material;

           (g) promptly after the record date set by the Board of Directors 
to determine the stockholders entitled to vote at ActaMed's annual meeting of 
stockholders (but in any event ten (10) days prior to such meeting), a list 
of all stockholders of ActaMed and their respective holdings; and

           (h) promptly upon request therefor, such other data, filings and 
information as any UHC may from time to time reasonably request.

                                       
                                  ARTICLE 14
                              GENERAL PROVISIONS

     14.1  NOTICES.

           (a) All notices, requests, demands and other communications 
hereunder shall be in writing and shall be deemed to have been given if (1) 
delivered by hand or if mailed by United States registered or certified mail, 
return receipt requested, first class postage prepaid, (2) sent by Federal 
Express or similar overnight courier service to the parties or their 
assignees, or (3) sent by telecopy to the number set forth below and promptly 
followed by a written copy sent by any other means specified herein, 
addressed as follows:

           If to UHC or the Company:
           
           United Healthcare Corporation Inc.
           9900 Bren Road East
           Minneapolis, Minnesota  55440-1459
           Attention: Chief Information Officer
           Telephone:  (___)____________
           Telecopy:  (___)_____________
           
           If to ActaMed and/or SubCorp:
           

                                   -lvii-
<PAGE>

           ActaMed Corporation
           Suite 600
           7000 Central Parkway
           Atlanta, Georgia  30328
           Attention:  Chief Financial Officer
           Telephone: (770) 551-1600
           Telecopy:  (770) 551-1815
           
           with a copy to:
           
           Alston & Bird
           One Atlantic Center
           1201 West Peachtree Street
           Atlanta, Georgia  30309-3424
           Attention:  J. Vaughan Curtis, Esq.
           Telephone:  (404) 881-7000
           Telecopy Number:  (404) 881-7777

           (b) If delivered personally, the date on which a notice, request, 
instruction or document is delivered shall be the date on which such delivery 
is made and, if delivered by mail, telecopy, Federal Express or other 
overnight courier, the date on which such notice, request, instruction or 
document is first received shall be the date of delivery.

           (c) Any party hereto may change its address specified for notices 
herein by designating a new address by notice in accordance with this 
SECTION 14.1.

           (d) Failure of any party to send a copy of any notice to counsel 
for the other party shall not affect in any way the validity of such notice 
to other party.

     14.2  FURTHER ASSURANCES.  Each party covenants that at any time, and 
from time to time, after the Closing Date, it will execute such additional 
instruments and take such actions as may be reasonably requested by the other 
parties to confirm or perfect or otherwise to carry out the intent and 
purposes of this Agreement.

     14.3  WAIVER.  Any failure on the part of any party hereto to comply 
with any of its obligations, agreements or conditions hereunder may be waived 
by any other party to whom such compliance is owed.  No waiver of any 
provision of this Agreement shall be deemed, or shall constitute, a waiver of 
any other provision, whether or not similar, nor shall any waiver constitute 
a continuing waiver.

     14.4  ASSIGNMENT.  This Agreement shall not be assignable by any of the 
parties hereto without the written consent of the other parties hereto, and 
no rights under this Agreement may be transferred, except that:


                                    -lviii-
<PAGE>

           (a) the rights of ActaMed under this Agreement may be transferred 
to any successor, by purchase of assets, merger or other corporate 
reorganization;

           (b) the rights of UHC under this Agreement may be transferred 
after the Closing in connection with a transfer of Preferred Shares made in 
accordance with the provisions of the Stockholders' Agreement (other than a 
transfer pursuant to a registration statement under the Securities Act or a 
transfer pursuant to Rule 144 thereunder); and

           (c) all the rights of UHC may be transferred to an Affiliate of 
UHC; PROVIDED, that any such transferee of UHC shall execute and deliver to 
ActaMed an instrument satisfactory to it agreeing to be bound by the 
provisions hereof and of the Stockholders' Agreement and the Registration 
Rights Agreement.  

     14.5  BINDING EFFECT.  Subject to the limitations on transfer set forth 
in SECTION 14.4, this Agreement shall be binding upon and inure to the 
benefit of the parties hereto and their respective heirs, legal 
representatives, executors, administrators, successors and assigns.

     14.6  KNOWLEDGE.  The use of the terms "to ActaMed's knowledge" or "to 
the best of ActaMed's knowledge" shall mean the facts known to P.E. Sadler, 
Michael K. Hoover, and Nancy J. Ham after reasonable inquiry.

     14.7  HEADINGS.  The section and other headings in this Agreement are 
inserted solely as a matter of convenience and for reference, and are not a 
part of this Agreement.

     14.8  ENTIRE AGREEMENT.  This Agreement and the Exhibits, Schedules, 
certificates and other documents delivered pursuant hereto or incorporated 
herein by reference, contain and constitute the entire agreement among the 
parties hereto and supersede and cancel any prior agreements, 
representations, warranties, or communications, whether oral or written, 
among the parties hereto relating to the transactions contemplated hereby or 
the subject matter herein. This Agreement may be changed, waived, discharged 
or terminated only by an agreement in writing signed by (A) ActaMed and (B) 
UHC or, after the Closing Date, the holder(s) of a majority of the Preferred 
Shares and any Conversion Shares considered as a single class.

     14.9  GOVERNING LAW.  Except as set forth in SECTION 6.12, this 
Agreement shall be governed by and construed in accordance with the laws of 
the State of Georgia.

     14.10 COUNTERPARTS.  This Agreement may be executed in one or more 
counterparts, each of which shall be deemed an original, but all of which 
together shall constitute one and the same instrument.

     14.11 PRONOUNS.  All pronouns used herein shall be deemed to refer to 
the masculine, feminine or neutral gender as the context requires.


                                    -lix-
<PAGE>

     14.12 TIME OF ESSENCE.  Time is of the essence in this Agreement.

     14.13 SCHEDULES AND EXHIBITS.  All Schedules and Exhibits attached to 
this Agreement are by this reference made a part hereof.


                                     -lx-
<PAGE>
                                       
[SIGNATURE PAGE TO AGREEMENT AND PLAN OF MERGER DATED MARCH 1, 1996 BY AND AMONG
   ACTAMED CORPORATION, SUBCORP, INC., UHC GREEN ACQUISITION, INC. AND UNITED
                            HEALTHCARE CORPORATION]

     IN WITNESS WHEREOF, the parties hereto have executed this Agreement 
under seal as of the day and year first above written.


ACTAMED CORPORATION                     EDI ACQUISITION, INC.


By : /s/ MICHAEL K. HOOVER              By:  /s/ MICHAEL K. HOOVER
     ---------------------------             ----------------------------
     Name:  Michael K. Hoover                Name:  Michael K. Hoover
            --------------------                    ---------------------
     Title:  President                       Title:  President
             -------------------                     --------------------



UNITED HEALTHCARE                       UHC GREEN ACQUISITION, INC.
CORPORATION

By : /s/ TRAVERS H. WILLS               By:  /s/ TRAVERS H. WILLS
     ---------------------------------       -------------------------------
     Name:  Travers H. Wills              Name:  Travers H. Wills
            --------------------------           ---------------------------
     Title:  Chief Operating Officer       Title:  Chief Operating Officer
            --------------------------           ---------------------------


                                    -lxi-
<PAGE>
                                       
                                   EXHIBIT A
                                 DEFINED TERMS

     "ACTAMED" - ActaMed Corporation, a Georgia corporation.

     "ACTAMED BUSINESS" - The business of selling and developing information 
systems and related technology for the healthcare industry.

     "ACTAMED COMMON STOCK" - The $.01 par value common stock of ActaMed.  

     "ACTAMED DOCUMENTS" - All of the Transaction Documents to which either 
ActaMed or SubCorp is a party.

     "ACTAMED FINANCIAL STATEMENTS" - The materials described in SECTION 5.4(a) 
of this Agreement.

     "ACTAMED INDEMNITEE" - ActaMed and SubCorp and their respective 
directors, officers, employees, affiliates and assigns.

     "AFFILIATE" - Any person, firm, corporation, partnership or association 
controlling, controlled by or under common control with another person, firm, 
corporation, partnership or association.

     "AGREEMENT" - This Agreement and Plan of Merger, including the Exhibits 
and Schedules delivered pursuant hereto.

     "BENEFIT PLAN" - An employee benefit plan or agreement of a person for 
the benefit of its shareholders, officers, directors, employees, or 
independent contractors, including, without limitation, (a) any affirmative 
action plans or programs, (b) any current and deferred compensation, 
severance, vacation, stock purchase, stock option, bonus and incentive 
compensation benefits, (c) any "employee benefit plan" (as defined in ERISA 
Section 3(3)) and (d) any medical, hospital, life, health, accident, 
disability, death and other fringe and welfare benefits, including any 
split-dollar life insurance policies, all of which plans, programs, 
practices, policies and other individual and group arrangements and 
agreements, including any unwritten compensation, fringe benefit, payroll or 
employment practices, procedures or policies of any kind or description. 

     "CLAIM" - Any claim for indemnification under ARTICLE 9, including but 
not limited to a General Claim, a Tax Claim or an Ownership Claim.  

     "CLAIMS NOTICE" - A written notice of an indemnification claim delivered 
pursuant to SECTION 9.5 hereof.

     "CLOSING" - The closing referred to in SECTION 1.2 hereof.


                                      A-1
<PAGE>

     "CLOSING DATE" - The date referred to in SECTION 1.2 hereof for the 
closing of the transactions contemplated by this Agreement.

     "CODE" - The Internal Revenue Code of 1986, as amended.

     "COMPANY" - UHC Green Acquisition, Inc., a Nevada corporation.

     "COMPANY BUSINESS" - The business of providing electronic data 
interchange products and services to the health care industry, excluding 
EmployerLink and LaborLink, whether conducted by the Company or any other 
member of the UHC Group.

     "COMPANY COMMON STOCK" - The common stock, $.01 par value, of the Company.

     "CONTRACT" - Any written or oral contract, agreement, lease, plan, 
instrument or other document, commitment, arrangement, undertaking, practice 
or authorization that is or may be binding on any person or its property 
under applicable law.

     "CONVERSION SHARES" - The shares of ActaMed Common Stock issued or 
issuable upon the conversion of the Preferred Shares.

     "COURT ORDER" - Any judgment, decree, writ, injunction, order or ruling 
of any federal, state or local court or governmental or regulatory body or 
authority that is binding on any person or its property under applicable law.

     "DEFAULT" - (a) a breach of or default under any Contract or License, 
(b) the occurrence of an event that with the passage of time or the giving of 
notice or both would constitute a breach of or default under any Contract or 
License, or (c) the occurrence of an event that with or without the passage 
of time or the giving of notice or both would give rise to a right of 
termination, renegotiation or acceleration under any Contract or License.

     "EDI FINANCIAL STATEMENTS" - The materials described in SECTION 4.6(a) 
of this Agreement.

     "EFFECTIVE TIME" - The date and time at which the Merger becomes 
effective pursuant to SECTION 1.3 of this Agreement.

     "ENVIRONMENTAL CONDITION" - (a) The introduction into the environment of 
any pollution, including without limitation any contaminant, irritant or 
pollutant or other toxic or hazardous substance (whether or not such 
pollution constituted at the time thereof a violation of any federal, state 
or local law, ordinance or governmental rule or Regulation) as a result of 
any spill, discharge, leak, emission, escape, injection, dumping or release 
of 


                                    A-2
<PAGE>

any kind whatsoever of any substance or exposure of any type in any work 
places or to any medium, including without limitation air, land, surface 
waters or ground waters, or from any generation, transportation, treatment, 
discharge, storage or disposal of waste materials, raw materials, hazardous 
materials, toxic materials or products of any kind or from the storage, use 
or handling of any hazardous or toxic materials or other substances, as a 
result of which the Company has or may become liable to any person by any 
reason of which any of the assets of the Company may suffer or be subjected 
to any Lien, or (b) any noncompliance with any federal, state or local 
environmental law, rule, Regulation or order as a result of or in connection 
with any of the foregoing.

     "ERISA" - The Employee Retirement Income Security Act of 1974, as amended.

     "EXCHANGE ACT" - The Securities Exchange Act of 1934, as amended.

     "FASB 5" - Statement of Financing Accounting Standards No. 5 issued by 
the Financial Accounting Standards Board in March 1975.

     "GAAP" - Generally accepted accounting principles.

     "GENERAL CLAIM" - Any claim other than a Tax Claim, Ownership Claim or 
Undisclosed Liability Claim based upon, arising out of or otherwise in 
respect of: any inaccuracy in any representation or warranty or any breach of 
any covenant or agreement made or to be performed by a party pursuant to this 
Agreement.

     "HIRED EMPLOYEES" - The employees assigned to the Company Business and 
identified on SCHEDULE 6.5.

     "HIRED HOLD-OVER EMPLOYEE" - See SECTION 6.4 of this Agreement.

     "HSR ACT" - Section 7A of the Clayton Act, as added by Title II of the 
Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, and the 
rules and regulations promulgated thereunder.

     "INDEMNITEE" - A party seeking indemnification under SECTIONS 9.3 or 9.4.

     "INDEMNIFYING PARTY" - The party obligated to provide indemnification 
pursuant to SECTIONS 9.3 or 9.4.

     "INTELLECTUAL PROPERTY" - Copyrights, trademarks, service marks, trade 
names, patents, applications therefor, technology rights and licenses, 
computer software (including, without limitation, any source or object codes 
therefor or documentation relating thereto), trade secrets, franchises, 
know-how, inventions and intellectual property rights.


                                    A-3
<PAGE>

     "IRS" - The Internal Revenue Service.

     "LIABILITY" - Any direct or indirect liability, indebtedness, 
obligation, expense, claim, deficiency, guaranty or endorsement of or by any 
person (other than endorsements of notes, bills and checks presented to banks 
for collection or deposit in the ordinary course of business) of any type, 
whether accrued, absolute, contingent, matured, unmatured or other.

     "LICENSE" - Any license, franchise, notice, permit, easement, right, 
authorization or filing.

     "LIEN" - Any mortgage, lien, security interest, pledge, encumbrance, 
restriction on transferability, defect of title, charge or claim of any 
nature whatsoever on any property or property interest.

     "LITIGATION" - Any lawsuit, action, claim, arbitration, administrative 
or other proceeding, criminal prosecution or governmental investigation or 
inquiry involving or affecting the Company or its business, assets or 
Contracts to which the Company is a party or by which it or its business, 
assets or Contracts may be bound or affected.

     "LOSSES" - Any and all demands, claims, actions or causes of action, 
assessments, losses, diminution in value, damages (including special and 
consequential damages), liabilities, costs, and expenses, including without 
limitation, interest, penalties, cost of investigation and defense, and 
reasonable attorneys' and other professional fees and expenses.

     "MATERIAL ADVERSE EFFECT" - With respect to ActaMed, a material adverse 
effect on the ability of ActaMed to conduct the ActaMed Business or the 
impairment of ActaMed's ability to perform its obligations under the ActaMed 
Documents.

     "MERGER" - The merger of SubCorp with and into the Company pursuant to 
this Agreement.  

     "OWNERSHIP CLAIM" - Any claim arising out of or otherwise in respect of 
any inaccuracy in the representations and warranties set forth in SECTIONS 4.1,
4.2, 4.3, 4.4 or 4.16 or 5.2 or 5.7 of this Agreement.

     "PUBLIC OFFERING" - A bona fide firm commitment underwritten offering of 
ActaMed Common Stock pursuant to a registration statement filed with and 
declared effective by the SEC.

     "PREFERRED SHARES" - The shares of Series C Preferred Stock issued to 
UHC pursuant to SECTION 3.1(a).


                                     A-4
<PAGE>

     "REGISTRATION RIGHTS AGREEMENT" - The Registration Rights Agreement 
dated May 3, 1994, by and among ActaMed and the signatures thereto, as 
amended.

     "REGISTRATION RIGHTS AGREEMENT AMENDMENT" - The agreement referenced in 
SECTION 1.4(a)(2) hereof.

     "REGULATION" - Any statute, law, ordinance, regulation, order or rule of 
any federal, state, local or other governmental agency or body or of any 
other type of regulatory body, including, without limitation, those covering 
environmental, energy, safety, health, transportation, bribery, 
recordkeeping, zoning, antidiscrimination, antitrust, wage and hour, and 
price and wage control matters.

     "RESTATED ARTICLES"  Before the Closing, the Second Amended and Restated 
Articles of Incorporated of ActaMed and, after the Closing, the Third Amended 
and Restated Articles of Incorporation of ActaMed.

     "RESTRICTED PAYMENT" means (a) any payment or the incurrence of any 
liability to make any payment in cash, property or other assets as a dividend 
or other distribution in respect of any shares of capital stock of ActaMed or 
any Subsidiary, excluding, however, any dividends payable to ActaMed by a 
Subsidiary or dividends which may be payable solely in ActaMed Common Stock 
of ActaMed or any Subsidiary and (b) except as otherwise permitted by the 
Transaction Documents or a stock option agreement under the Stock Option 
Plans, any payment or the incurrence of any liability to make any payment in 
cash, property or other assets for the purposes of purchasing, retiring or 
redeeming any shares of any class of capital stock of ActaMed or any 
Subsidiary or any warrants, options or other rights to purchase any such 
shares.

     "SCHEDULE" - Any of the disclosure schedules referred to in ARTICLES 4 or
5.

     "SEC" - The Securities and Exchange Commission.

     "SECURITIES ACT" - The Securities Act of 1933, as amended.

     "SERIES A PREFERRED STOCK" - The Series A Convertible Preferred Stock of 
ActaMed.

     "SERIES B PREFERRED STOCK" - The Series B Convertible Preferred Stock of 
ActaMed.

     "SERIES C PREFERRED STOCK" - The Series C Convertible Preferred Stock of 
ActaMed.

     "SERVICES AND LICENSE AGREEMENT" - The agreement referenced in SECTION 
1.4(a)(1) hereof.


                                     A-5
<PAGE>

     "SHAREHOLDERS' AGREEMENT AMENDMENT" - The agreement referenced in 
SECTION 1.4(a)(3) hereof.

     "SHARES" - The total of 1,000 shares of Company Common Stock 
constituting in the aggregate one hundred percent (100%) of the issued and 
outstanding common stock of the Company.

     "STANDSTILL AGREEMENT AMENDMENT" - The agreement referenced in 
SECTION 1.4(a)(4) hereof.

     "SUBCORP" - EDI Acquisition, Inc., a Georgia corporation.

     "SUBSIDIARY" - A corporation, limited liability company, partnership, 
association, trust, joint venture or other entity in which ActaMed or the 
Company, as the case may be, has, directly or indirectly, an equity, 
ownership or proprietary interest of greater than ten percent (10%).

     "SUBSTANTIAL HOLDER" - An officer or employee of ActaMed or SubCorp who 
is the beneficial owner of one percent (1%) or more of the outstanding voting 
power or the outstanding equity (on a fully diluted basis) of ActaMed.

     "SURVIVING CORPORATION" - The Company, as the surviving corporation of 
the Merger, after the Merger.  

     "TAX CLAIM" - Any claim based upon, arising out of or otherwise in 
respect of any inaccuracy in any representation or warranty or breach of any 
covenant or agreement made or to be performed by a party pursuant to this 
Agreement related to any Taxes.

     "TAXES" - Any federal, state, county, local and other taxes, including 
without limitation, income taxes, estimated taxes, excise taxes, sales taxes, 
use taxes, gross receipts taxes, franchise taxes, taxes on earnings and 
profits, employment and payroll related taxes, property taxes, real property 
transfer taxes, Federal Insurance Contributions Act taxes, taxes on value 
added and import duties, whether or not measured in whole or in part by net 
income, imposed by the United States or any political subdivision thereof or 
by any jurisdiction other than the United States or any political subdivision 
thereof.

     "THIRD PARTY CLAIM" - Any claim, suit or proceeding (including, without 
limitation, a binding arbitration or an audit by any taxing authority) that 
is instituted against an Indemnitee by a person or entity other than an 
Indemnitor and which, if prosecuted successfully, would result in a Loss for 
which such Indemnitee is entitled to indemnification hereunder.


                                     A-6
<PAGE>

     "TRANSACTION DOCUMENTS" - This Agreement and the documents exchanged by 
the parties at the Closing.

     "TRANSITION SERVICES AGREEMENT" - The agreement referenced in SECTION 
1.4(a)(5) hereof.

     "UHC" - United Healthcare Corporation, a Minnesota corporation.

     "UHC DOCUMENTS" - All of the Transaction Documents to which either UHC 
or the Company is a party.

     "UHC GROUP" - UHC and its Affiliates.

     "UHC INDEMNITEE" - UHC and its directors, officers, employees, 
affiliates and assigns.

     "UNDISCLOSED LIABILITY CLAIM" - Any claim arising out of or otherwise in 
respect of any inaccuracy in the representations and warranties set forth in 
SECTIONS 4.7, 4.8, 4.10, 4.20 or 4.23.


                                     A-7
<PAGE>
                                       
                                 AMENDMENT TO
                         AGREEMENT AND PLAN OF MERGER
                                          
     
     THIS AMENDMENT (this "Amendment") to the Agreement and Plan of Merger 
dated March 1, 1996 (the "Plan of Merger") is entered into this 4th day of 
April, 1996, by and among ActaMed Corporation, EDI Acquisition, Inc., United 
HealthCare Corporation and EDI Services, Inc. (formerly UHC Green 
Acquisition, Inc.). Capitalized terms used herein but not otherwise defined 
shall have the meanings ascribed to them in the Plan of Merger.

     WHEREAS, the parties hereto desire to amend the Plan of Merger as set 
forth herein.

     NOW, THEREFORE, in consideration of the mutual promises and covenants 
contained herein and for other good and valuable consideration, the receipt 
and sufficiency of which are hereby acknowledged, the parties hereto agree as 
follows:

     1.  SECTION 1.2.  The second sentence of Section 1.2 of the Plan of 
Merger is hereby deleted and is replaced in its entirety by the following 
sentence:

     "Notwithstanding the foregoing, if the Closing does not occur on the 
     first day of a month, then solely for financial accounting and reporting 
     purposes, the parties hereto agree that the transactions contemplated 
     herein shall be deemed to have closed as of the first day of the month 
     in which the Closing occurs or the last day of the preceding month, as 
     appropriate; provided that the parties hereto agree that for all other 
     purposes, including, without limitation, risk of loss, the Closing shall 
     occur, and shall be deemed to have occurred on the actual date of the 
     Closing."

     3.  SECTION 3.3.  The following Section 3.3 is hereby added to the Plan 
of Merger:

     "3.3  BASIS OF ASSETS OF THE COMPANY.  Actamed and UHC recognize and 
     agree that the prearranged transfer by UHC of the assets to the Company 
     in contemplation of and in connection with the sale of the stock of the 
     Company to Actamed is not a transaction described in Section 351 of the 
     Internal Revenue Code, that such transfer to the Company is taxable to 
     UHC as a taxable transfer of assets to the Company and the Company has a 
     fair market value basis in the assets received in the transfer from UHC 
     immediately prior to the time of the transaction contemplated hereby.  
     UHC and Actamed agree to report the foregoing transactions in a manner 
     consistent herewith.  In addition, and in order to assure that Actamed 
     shall have a basis in the assets of the Company equal to the amount paid 
     pursuant to this Agreement, in lieu of the foregoing reporting and at 
     Actamed's request, Actamed and UHC will make a timely election under 
     Section 338(h)(10) of the Internal Revenue Code and any corresponding 
     elections under state or local tax law.  Actamed and UHC shall cooperate 
     in taking all actions necessary to report the transaction as described 
     above, or at Actamed's request to effect the election, including the 
     execution and preparation of all forms, returns, elections and schedules 
     and other documents and instruments.  Any allocation of basis among the 
     assets of the Company shall be initially prepared by UHC and consented 
     to by Actamed. Any such allocation shall, for tax purposes, be binding 
     on Actamed and UHC and no party shall take any position inconsistent 
     with such allocation. UHC and Actamed agree 


<PAGE>

     that any liability for Tax arising out of or in any way attributable to 
     the sale or deemed sale of assets by UHC shall be for the sole account 
     of the UHC."
     
     2.  SECTION 4.1.  The last sentence of Section 4.1 of the Plan of Merger is
hereby deleted and is replaced in its entirety by the following sentence:

     "Substantially all of the assets required for the operation of the 
     Company Business were transferred to the Company on December 15, 1995, 
     and the Company did not have any operations prior to such date."
     
     IN WITNESS WHEREOF, the undersigned parties have executed this Amendment as
of the day and year first above written.
                                       
                                       ACTAMED CORPORATION
     
     
                                       By:  /S/ MICHAEL K. HOOVER
                                           ------------------------------
                                            Michael K. Hoover, President
     
     
                                       EDI ACQUISITION, INC.
     
     
                                       By:  /S/ MICHAEL K. HOOVER
                                           ------------------------------
                                            Michael K. Hoover, President
     
     
                                       UNITED HEALTHCARE CORPORATION
     
     
                                       By:  /s/ TRAVERS H. WILLS
                                           ------------------------------
                                       Title:  Chief Operating Officer
                                              ---------------------------
     
     
                                       EDI SERVICES, INC.
     
     
                                       By:  /s/ TRAVERS H. WILLS
                                           ------------------------------
                                       Title:  Chief Operating Officer
                                              ---------------------------




<PAGE>
                                                                Exhibit 10.1


                          HEALTHEON CORPORATION
                         a Delaware corporation

                        INDEMNIFICATION AGREEMENT



     This Indemnification Agreement ("Agreement") is effective as of 
___________, 1998 by and between Healtheon Corporation, a Delaware 
corporation (the "Company"), and ___________ ("Indemnitee").

     WHEREAS, the Company desires to attract and retain the services of 
highly qualified individuals, such as Indemnitee, to serve the Company and 
its related entities;

     WHEREAS, in order to induce Indemnitee to continue to provide services to
the Company, the Company wishes to provide for the indemnification of, and the
advancement of expenses to, Indemnitee to the maximum extent permitted by law;

     WHEREAS, the Company and Indemnitee recognize the continued difficulty 
in obtaining liability insurance for the Company's directors, officers, 
employees, agents and fiduciaries, the significant increases in the cost of 
such insurance and the general reductions in the coverage of such insurance;

     WHEREAS, the Company and Indemnitee further recognize the substantial 
increase in corporate litigation in general, subjecting directors, officers, 
employees, agents and fiduciaries to expensive litigation risks at the same 
time as the availability and coverage of liability insurance has been 
severely limited;

     WHEREAS, the Company and Indemnitee desire to continue to have in place 
the additional protection provided by an indemnification agreement and to 
provide indemnification and advancement of expenses to the Indemnitee to the 
maximum extent permitted by Delaware law;

     NOW, THEREFORE, the Company and Indemnitee hereby agree to the following:

     1.   CERTAIN DEFINITIONS.

          (a)  "Change in Control" shall mean, and shall be deemed to have 
occurred if, on or after the date of this Agreement, (i) any "person" (as 
such term is used in Sections 13(d) and 14(d) of the Securities Exchange Act 
of 1934, as amended), other than a trustee or other fiduciary holding 
securities under an employee benefit plan of the Company acting in such 
capacity or a corporation owned directly or indirectly by the stockholders of 
the Company in substantially the same proportions as their ownership of stock 
of the Company, becomes the "beneficial owner" (as defined in Rule 13d-3 
under said Act), directly or indirectly, of securities of the Company 
representing more than 50% of the total voting power represented by the 
Company's then outstanding Voting Securities, (ii) during any period of two 
consecutive years, individuals who at 

<PAGE>

the beginning of such period constitute the Board of Directors of the Company 
and any new director whose election by the Board of Directors or nomination 
for election by the Company's stockholders was approved by a vote of at least 
two thirds (2/3) of the directors then still in office who either were 
directors at the beginning of the period or whose election or nomination for 
election was previously so approved, cease for any reason to constitute a 
majority thereof, or (iii) the stockholders of the Company approve a merger 
or consolidation of the Company with any other corporation other than a 
merger or consolidation which would result in the Voting Securities of the 
Company outstanding immediately prior thereto continuing to represent (either 
by remaining outstanding or by being converted into Voting Securities of the 
surviving entity) at least 80% of the total voting power represented by the 
Voting Securities of the Company or such surviving entity outstanding 
immediately after such merger or consolidation, or the stockholders of the 
Company approve a plan of complete liquidation of the Company or an agreement 
for the sale or disposition by the Company of (in one transaction or a series 
of related transactions) all or substantially all of the Company's assets.

          (b)  "Claim" shall mean with respect to a Covered Event:  any 
threatened, pending or completed action, suit, proceeding or alternative 
dispute resolution mechanism, or any hearing, inquiry or investigation that 
Indemnitee in good faith believes might lead to the institution of any such 
action, suit, proceeding or alternative dispute resolution mechanism, whether 
civil, criminal, administrative, investigative or other.

          (c)  References to the "Company" shall include, in addition to 
Healtheon Corporation, any constituent corporation (including any constituent 
of a constituent) absorbed in a consolidation or merger to which Healtheon 
Corporation (or any of its wholly owned subsidiaries) is a party which, if 
its separate existence had continued, would have had power and authority to 
indemnify its directors, officers, employees, agents or fiduciaries, so that 
if Indemnitee is or was a director, officer, employee, agent or fiduciary of 
such constituent corporation, or is or was serving at the request of such 
constituent corporation as a director, officer, employee, agent or fiduciary 
of another corporation, partnership, joint venture, employee benefit plan, 
trust or other enterprise, Indemnitee shall stand in the same position under 
the provisions of this Agreement with respect to the resulting or surviving 
corporation as Indemnitee would have with respect to such constituent 
corporation if its separate existence had continued.

          (d)  "Covered Event" shall mean any event or occurrence related to 
the fact that Indemnitee is or was a director, officer, employee, agent or 
fiduciary of the Company, or any subsidiary of the Company, or is or was 
serving at the request of the Company as a director, officer, employee, agent 
or fiduciary of another corporation, partnership, joint venture, trust or 
other enterprise, or by reason of any action or inaction on the part of 
Indemnitee while serving in such capacity.

          (e)  "Expenses" shall mean any and all expenses (including 
attorneys' fees and all other costs, expenses and obligations incurred in 
connection with investigating, defending, 

                                       -2-
<PAGE>

being a witness in or participating in (including on appeal), or preparing to 
defend, to be a witness in or to participate in, any action, suit, 
proceeding, alternative dispute resolution mechanism, hearing, inquiry or 
investigation), judgments, fines, penalties and amounts paid in settlement 
(if such settlement is approved in advance by the Company, which approval 
shall not be unreasonably withheld), actually and reasonably incurred, of any 
Claim and any federal, state, local or foreign taxes imposed on the 
Indemnitee as a result of the actual or deemed receipt of any payments under 
this Agreement.

          (f)  "Expense Advance" shall mean a payment to Indemnitee pursuant 
to Section 3 of Expenses in advance of the settlement of or final judgement 
in any action, suit, proceeding or alternative dispute resolution mechanism, 
hearing, inquiry or investigation which constitutes a Claim.

          (g)  "Independent Legal Counsel" shall mean an attorney or firm of 
attorneys, selected in accordance with the provisions of Section 2(d) hereof, 
who shall not have otherwise performed services for the Company or Indemnitee 
within the last three years (other than with respect to matters concerning 
the rights of Indemnitee under this Agreement, or of other indemnitees under 
similar indemnity agreements).

          (h)  References to "other enterprises" shall include employee 
benefit plans; references to "fines" shall include any excise taxes assessed 
on Indemnitee with respect to an employee benefit plan; and references to 
"serving at the request of the Company" shall include any service as a 
director, officer, employee, agent or fiduciary of the Company which imposes 
duties on, or involves services by, such director, officer, employee, agent 
or fiduciary with respect to an employee benefit plan, its participants or 
its beneficiaries; and if Indemnitee acted in good faith and in a manner 
Indemnitee reasonably believed to be in the interest of the participants and 
beneficiaries of an employee benefit plan, Indemnitee shall be deemed to have 
acted in a manner "not opposed to the best interests of the Company" as 
referred to in this Agreement.

          (i)  "Reviewing Party" shall mean, subject to the provisions of 
Section 2(d), any person or body appointed by the Board of Directors in 
accordance with applicable law to review the Company's obligations hereunder 
and under applicable law, which may include a member or members of the 
Company's Board of Directors, Independent Legal Counsel or any other person 
or body not a party to the particular Claim for which Indemnitee is seeking 
indemnification.

          (j)  "Section" refers to a section of this Agreement unless 
otherwise indicated.

          (k)  "Voting Securities" shall mean any securities of the Company 
that vote generally in the election of directors.

                                       -3-
<PAGE>

     2.   INDEMNIFICATION.

          (a)  INDEMNIFICATION OF EXPENSES.  Subject to the provisions of 
Section 2(b) below, the Company shall indemnify Indemnitee for Expenses to 
the fullest extent permitted by law if Indemnitee was or is or becomes a 
party to or witness or other participant in, or is threatened to be made a 
party to or witness or other participant in, any Claim (whether by reason of 
or arising in part out of a Covered Event), including all interest, 
assessments and other charges paid or payable in connection with or in 
respect of such Expenses.

          (b)  REVIEW OF INDEMNIFICATION OBLIGATIONS.  Notwithstanding the 
foregoing, in the event any Reviewing Party shall have determined (in a 
written opinion, in any case in which Independent Legal Counsel is the 
Reviewing Party) that Indemnitee is not entitled to be indemnified 
hereunder under applicable law, (i) the Company shall have no further 
obligation under Section 2(a) to make any payments to Indemnitee not made 
prior to such determination by such Reviewing Party, and (ii) the Company 
shall be entitled to be reimbursed by Indemnitee (who hereby agrees to 
reimburse the Company) for all Expenses theretofore paid in indemnifying 
Indemnitee; PROVIDED, HOWEVER, that if Indemnitee has commenced or thereafter 
commences legal proceedings in a court of competent jurisdiction to secure a 
determination that Indemnitee is entitled to be indemnified hereunder under 
applicable law, any determination made by any Reviewing Party that Indemnitee 
is not entitled to be indemnified hereunder under applicable law shall not be 
binding and Indemnitee shall not be required to reimburse the Company for any 
Expenses theretofore paid in indemnifying Indemnitee until a final judicial 
determination is made with respect thereto (as to which all rights of appeal 
therefrom have been exhausted or lapsed).  Indemnitee's obligation to 
reimburse the Company for any Expenses shall be unsecured and no interest 
shall be charged thereon.

          (c)  INDEMNITEE RIGHTS ON UNFAVORABLE DETERMINATION; BINDING 
EFFECT.  If any Reviewing Party determines that Indemnitee substantively is 
not entitled to be indemnified hereunder in whole or in part under applicable 
law, Indemnitee shall have the right to commence litigation seeking an 
initial determination by the court or challenging any such determination by 
such Reviewing Party or any aspect thereof, including the legal or factual 
bases therefor, and, subject to the provisions of Section 15, the Company 
hereby consents to service of process and to appear in any such proceeding.  
Absent such litigation, any determination by any Reviewing Party shall be 
conclusive and binding on the Company and Indemnitee.

          (d)  SELECTION OF REVIEWING PARTY; CHANGE IN CONTROL.  If there has 
not been a Change in Control, any Reviewing Party shall be selected by the 
Board of Directors, and if there has been such a Change in Control (other 
than a Change in Control which has been approved by a majority of the 
Company's Board of Directors who were directors immediately prior to such 
Change in Control), any Reviewing Party with respect to all matters 
thereafter arising concerning the rights of Indemnitee to indemnification of 
Expenses under this Agreement or any other agreement or under the Company's 
Certificate of Incorporation or Bylaws as now or hereafter in 

                                       -4-
<PAGE>

effect, or under any other applicable law, if desired by Indemnitee, shall be 
Independent Legal Counsel selected by Indemnitee and approved by the Company 
(which approval shall not be unreasonably withheld).  Such counsel, among 
other things, shall render its written opinion to the Company and Indemnitee 
as to whether and to what extent Indemnitee would be entitled to be 
indemnified hereunder under applicable law and the Company agrees to abide by 
such opinion.  The Company agrees to pay the reasonable fees of the 
Independent Legal Counsel referred to above and to indemnify fully such 
counsel against any and all expenses (including attorneys' fees), claims, 
liabilities and damages arising out of or relating to this Agreement or its 
engagement pursuant hereto.  Notwithstanding any other provision of this 
Agreement, the Company shall not be required to pay Expenses of more than one 
Independent Legal Counsel in connection with all matters concerning a single 
Indemnitee, and such Independent Legal Counsel shall be the Independent Legal 
Counsel for any or all other Indemnitees unless (i) the Company otherwise 
determines or (ii) any Indemnitee shall provide a written statement setting 
forth in detail a reasonable objection to such Independent Legal Counsel 
representing other Indemnitees.

          (e)  MANDATORY PAYMENT OF EXPENSES.  Notwithstanding any other 
provision of this Agreement other than Section 10 hereof, to the extent that 
Indemnitee has been successful on the merits or otherwise, including, without 
limitation, the dismissal of an action without prejudice, in defense of any 
Claim, Indemnitee shall be indemnified against all Expenses incurred by 
Indemnitee in connection therewith.

     3.   EXPENSE ADVANCES.

          (a)  OBLIGATION TO MAKE EXPENSE ADVANCES.  Upon receipt of a 
written undertaking by or on behalf of the Indemnitee to repay such amounts 
if it shall ultimately be determined that the Indemnitee is not entitled to 
be indemnified therefor by the Company, the Company shall make Expense 
Advances to Indemnitee.

          (b)  FORM OF UNDERTAKING.  Any written undertaking by the 
Indemnitee to repay any Expense Advances hereunder shall be unsecured and no 
interest shall be charged thereon.

          (c)  DETERMINATION OF REASONABLE EXPENSE ADVANCES.  The parties 
agree that for the purposes of any Expense Advance for which Indemnitee has 
made written demand to the Company in accordance with this Agreement, all 
Expenses included in such Expense Advance that are certified by affidavit of 
Indemnitee's counsel as being reasonable shall be presumed conclusively to be 
reasonable.

     4.   PROCEDURES FOR INDEMNIFICATION AND EXPENSE ADVANCES.

          (a)  TIMING OF PAYMENTS.  All payments of Expenses (including 
without limitation Expense Advances) by the Company to the Indemnitee 
pursuant to this Agreement shall be made to the fullest extent permitted by 
law as soon as practicable after written demand by 

                                       -5-
<PAGE>

Indemnitee therefor is presented to the Company, but in no event later than 
forty-five (45) business days after such written demand by Indemnitee is 
presented to the Company, except in the case of Expense Advances, which shall 
be made no later than twenty (20) business days after such written demand by 
Indemnitee is presented to the Company.  

          (b)  NOTICE/COOPERATION BY INDEMNITEE.  Indemnitee shall, as a 
condition precedent to Indemnitee's right to be indemnified or Indemnitee's 
right to receive Expense Advances under this Agreement, give the Company 
notice in writing as soon as practicable of any Claim made against Indemnitee 
for which indemnification will or could be sought under this Agreement.  
Notice to the Company shall be directed to the Chief Executive Officer of the 
Company at the address shown on the signature page of this Agreement (or such 
other address as the Company shall designate in writing to Indemnitee).  In 
addition, Indemnitee shall give the Company such information and cooperation 
as it may reasonably require and as shall be within Indemnitee's power.

          (c)  NO PRESUMPTIONS; BURDEN OF PROOF.  For purposes of this 
Agreement, the termination of any Claim by judgment, order, settlement 
(whether with or without court approval) or conviction, or upon a plea of 
NOLO CONTENDERE, or its equivalent, shall not create a presumption that 
Indemnitee did not meet any particular standard of conduct or have any 
particular belief or that a court has determined that indemnification is not 
permitted by this Agreement or applicable law.  In addition, neither the 
failure of any Reviewing Party to have made a determination as to whether 
Indemnitee has met any particular standard of conduct or had any particular 
belief, nor an actual determination by any Reviewing Party that Indemnitee 
has not met such standard of conduct or did not have such belief, prior to 
the commencement of legal proceedings by Indemnitee to secure a judicial 
determination that Indemnitee should be indemnified under this Agreement or 
applicable law, shall be a defense to Indemnitee's claim or create a 
presumption that Indemnitee has not met any particular standard of conduct or 
did not have any particular belief.  In connection with any determination by 
any Reviewing Party or otherwise as to whether the Indemnitee is entitled to 
be indemnified hereunder, the burden of proof shall be on the Company to 
establish that Indemnitee is not so entitled.

          (d)  NOTICE TO INSURERS.  If, at the time of the receipt by the 
Company of a notice of a Claim pursuant to Section 4(b) hereof, the Company 
has liability insurance in effect which may cover such Claim, the Company 
shall give prompt notice of the commencement of such Claim to the insurers in 
accordance with the procedures set forth in the respective policies.  The 
Company shall thereafter take all necessary or desirable action to cause such 
insurers to pay, on behalf of the Indemnitee, all amounts payable as a result 
of such Claim in accordance with the terms of such policies.

          (e)  SELECTION OF COUNSEL.  In the event the Company shall be 
obligated hereunder to provide indemnification for or make any Expense 
Advances with respect to the Expenses of any Claim, the Company, if 
appropriate, shall be entitled to assume the defense of 

                                       -6-
<PAGE>

such Claim with counsel approved by Indemnitee (which approval shall not be 
unreasonably withheld) upon the delivery to Indemnitee of written notice of 
the Company's election to do so.  After delivery of such notice, approval of 
such counsel by Indemnitee and the retention of such counsel by the Company, 
the Company will not be liable to Indemnitee under this Agreement for any 
fees or expenses of separate counsel subsequently employed by or on behalf of 
Indemnitee with respect to the same Claim; provided that, (i) Indemnitee 
shall have the right to employ Indemnitee's separate counsel in any such 
Claim at Indemnitee's expense and (ii) if (A) the employment of separate 
counsel by Indemnitee has been previously authorized by the Company, (B) 
Indemnitee shall have reasonably concluded that there may be a conflict of 
interest between the Company and Indemnitee in the conduct of any such 
defense, or (C) the Company shall not continue to retain such counsel to 
defend such Claim, then the fees and expenses of Indemnitee's separate 
counsel shall be Expenses for which Indemnitee may receive indemnification or 
Expense Advances hereunder.

     5.   ADDITIONAL INDEMNIFICATION RIGHTS; NONEXCLUSIVITY.

          (a)  SCOPE.  The Company hereby agrees to indemnify the Indemnitee 
to the fullest extent permitted by law, notwithstanding that such 
indemnification is not specifically authorized by statute.  In the event of 
any change after the date of this Agreement in any applicable law, statute or 
rule which expands the right of a Delaware corporation to indemnify a member 
of its board of directors or an officer, employee, agent or fiduciary, it is 
the intent of the parties hereto that Indemnitee shall enjoy by this 
Agreement the greater benefits afforded by such change.  In the event of any 
change in any applicable law, statute or rule which narrows the right of a 
Delaware corporation to indemnify a member of its board of directors or an 
officer, employee, agent or fiduciary, such change, to the extent not 
otherwise required by such law, statute or rule to be applied to this 
Agreement, shall have no effect on this Agreement or the parties' rights and 
obligations hereunder except as set forth in Section 10(a) hereof.

          (b)  NONEXCLUSIVITY.  The indemnification and the payment of 
Expense Advances provided by this Agreement shall be in addition to any 
rights to which Indemnitee may be entitled under the Company's Certificate of 
Incorporation, its Bylaws, any other agreement, any vote of stockholders or 
disinterested directors, the General Corporation Law of the State of 
Delaware, or otherwise.  The indemnification and the payment of Expense 
Advances provided under this Agreement shall continue as to Indemnitee for 
any action taken or not taken while serving in an indemnified capacity even 
though subsequent thereto Indemnitee may have ceased to serve in such 
capacity.

     6.   NO DUPLICATION OF PAYMENTS.  The Company shall not be liable under 
this Agreement to make any payment in connection with any Claim made against 
Indemnitee to the extent Indemnitee has otherwise actually received payment 
(under any insurance policy, provision of the Company's Certificate of 
Incorporation, Bylaws or otherwise) of the amounts otherwise payable 
hereunder.

                                       -7-
<PAGE>

     7.   PARTIAL INDEMNIFICATION.  If Indemnitee is entitled under any 
provision of this Agreement to indemnification by the Company for some or a 
portion of Expenses incurred in connection with any Claim, but not, however, 
for all of the total amount thereof, the Company shall nevertheless indemnify 
Indemnitee for the portion of such Expenses to which Indemnitee is entitled.

     8.   MUTUAL ACKNOWLEDGMENT.  Both the Company and Indemnitee acknowledge 
that in certain instances, federal law or applicable public policy may 
prohibit the Company from indemnifying its directors, officers, employees, 
agents or fiduciaries under this Agreement or otherwise.  Indemnitee 
understands and acknowledges that the Company has undertaken or may be 
required in the future to undertake with the Securities and Exchange 
Commission to submit the question of indemnification to a court in certain 
circumstances for a determination of the Company's right under public policy 
to indemnify Indemnitee.

     9.   LIABILITY INSURANCE.  To the extent the Company maintains liability 
insurance applicable to directors, officers, employees, agents or 
fiduciaries, Indemnitee shall be covered by such policies in such a manner as 
to provide Indemnitee the same rights and benefits as are provided to the 
most favorably insured of the Company's directors, if Indemnitee is a 
director; or of the Company's officers, if Indemnitee is not a director of 
the Company but is an officer; or of the Company's key employees, agents or 
fiduciaries, if Indemnitee is not an officer or director but is a key 
employee, agent or fiduciary.

     10.  EXCEPTIONS.  Notwithstanding any other provision of this Agreement, 
the Company shall not be obligated pursuant to the terms of this Agreement:

          (a)  EXCLUDED ACTION OR OMISSIONS.  To indemnify Indemnitee for 
Expenses resulting from acts, omissions or transactions for which Indemnitee 
is prohibited from receiving indemnification under this Agreement or 
applicable law; PROVIDED, HOWEVER, that notwithstanding any limitation set 
forth in this Section 10(a) regarding the Company's obligation to provide 
indemnification, Indemnitee shall be entitled under Section 3 to receive 
Expense Advances hereunder with respect to any such Claim unless and until a 
court having jurisdiction over the Claim shall have made a final judicial 
determination (as to which all rights of appeal therefrom have been exhausted 
or lapsed) that Indemnitee has engaged in acts, omissions or transactions for 
which Indemnitee is prohibited from receiving indemnification under this 
Agreement or applicable law.

          (b)  CLAIMS INITIATED BY INDEMNITEE.  To indemnify or make Expense 
Advances to Indemnitee with respect to Claims initiated or brought 
voluntarily by Indemnitee and not by way of defense, counterclaim or 
crossclaim, except (i) with respect to actions or proceedings brought to 
establish or enforce a right to indemnification under this Agreement or any 
other agreement or insurance policy or under the Company's Certificate of 
Incorporation or Bylaws now or hereafter in effect relating to Claims for 
Covered Events, (ii) in specific cases if the Board of 

                                       -8-
<PAGE>

Directors has approved the initiation or bringing of such Claim, or (iii) as 
otherwise required under Section 145 of the Delaware General Corporation Law, 
regardless of whether Indemnitee ultimately is determined to be entitled to 
such indemnification or insurance recovery, as the case may be.

          (c)  LACK OF GOOD FAITH.  To indemnify Indemnitee for any Expenses 
incurred by the Indemnitee with respect to any action instituted (i) by 
Indemnitee to enforce or interpret this Agreement, if a court having 
jurisdiction over such action determines as provided in Section 13 that each 
of the material assertions made by the Indemnitee as a basis for such action 
was not made in good faith or was frivolous, or (ii) by or in the name of the 
Company to enforce or interpret this Agreement, if a court having 
jurisdiction over such action determines as provided in Section 13 that each 
of the material defenses asserted by Indemnitee in such action was made in 
bad faith or was frivolous.

          (d)  CLAIMS UNDER SECTION 16(B).  To indemnify Indemnitee for 
expenses and the payment of profits arising from the purchase and sale by 
Indemnitee of securities in violation of Section 16(b) of the Securities 
Exchange Act of 1934, as amended, or any similar successor statute; PROVIDED, 
HOWEVER, that notwithstanding any limitation set forth in this Section 10(d) 
regarding the Company's obligation to provide indemnification, Indemnitee 
shall be entitled under Section 3 to receive Expense Advances hereunder with 
respect to any such Claim unless and until a court having jurisdiction over 
the Claim shall have made a final judicial determination (as to which all 
rights of appeal therefrom have been exhausted or lapsed) that Indemnitee has 
violated said statute.

     11.  COUNTERPARTS.  This Agreement may be executed in one or more 
counterparts, each of which shall constitute an original.

     12.  BINDING EFFECT; SUCCESSORS AND ASSIGNS.  This Agreement shall be 
binding upon and inure to the benefit of and be enforceable by the parties 
hereto and their respective successors, assigns (including any direct or 
indirect successor by purchase, merger, consolidation or otherwise to all or 
substantially all of the business or assets of the Company), spouses, heirs 
and personal and legal representatives.  The Company shall require and cause 
any successor (whether direct or indirect, and whether by purchase, merger, 
consolidation or otherwise) to all, substantially all, or a substantial part, 
of the business or assets of the Company, by written agreement in form and 
substance satisfactory to Indemnitee, expressly to assume and agree to 
perform this Agreement in the same manner and to the same extent that the 
Company would be required to perform if no such succession had taken place. 
This Agreement shall continue in effect regardless of whether Indemnitee 
continues to serve as a director, officer, employee, agent or fiduciary (as 
applicable) of the Company or of any other enterprise at the Company's 
request.

     13.  EXPENSES INCURRED IN ACTION RELATING TO ENFORCEMENT OR 
INTERPRETATION.  In the event that any action is instituted by Indemnitee 
under this Agreement or under any liability 

                                       -9-
<PAGE>

insurance policies maintained by the Company to enforce or interpret any of 
the terms hereof or thereof, Indemnitee shall be entitled to be indemnified 
for all Expenses incurred by Indemnitee with respect to such action 
(including without limitation attorneys' fees), regardless of whether 
Indemnitee is ultimately successful in such action, unless as a part of such 
action a court having jurisdiction over such action makes a final judicial 
determination (as to which all rights of appeal therefrom have been exhausted 
or lapsed) that each of the material assertions made by Indemnitee as a basis 
for such action was not made in good faith or was frivolous; provided, 
however, that until such final judicial determination is made, Indemnitee 
shall be entitled under Section 3 to receive payment of Expense Advances 
hereunder with respect to such action.  In the event of an action instituted 
by or in the name of the Company under this Agreement to enforce or interpret 
any of the terms of this Agreement, Indemnitee shall be entitled to be 
indemnified for all Expenses incurred by Indemnitee in defense of such action 
(including without limitation costs and expenses incurred with respect to 
Indemnitee's counterclaims and cross-claims made in such action), unless as a 
part of such action a court having jurisdiction over such action makes a 
final judicial determination (as to which all rights of appeal therefrom have 
been exhausted or lapsed) that each of the material defenses asserted by 
Indemnitee in such action was made in bad faith or was frivolous; provided, 
however, that until such final judicial determination is made, Indemnitee 
shall be entitled under Section 3 to receive payment of Expense Advances 
hereunder with respect to such action.

     14.  NOTICE.  All notices, requests, demands and other communications 
under this Agreement shall be in writing and shall be deemed duly given (i) 
if delivered by hand and signed for by the party addressed, on the date of 
such delivery, or (ii) if mailed by domestic certified or registered mail 
with postage prepaid, on the third business day after the date postmarked.  
Addresses for notice to either party are as shown on the signature page of 
this Agreement, or as subsequently modified by written notice.

     15.  CONSENT TO JURISDICTION.  The Company and Indemnitee each hereby 
irrevocably consent to the jurisdiction of the courts of the State of 
Delaware for all purposes in connection with any action or proceeding which 
arises out of or relates to this Agreement and agree that any action 
instituted under this Agreement shall be commenced, prosecuted and continued 
only in the Court of Chancery of the State of Delaware in and for New Castle 
County, which shall be the exclusive and only proper forum for adjudicating 
such a claim.

     16.  SEVERABILITY.  The provisions of this Agreement shall be severable 
in the event that any of the provisions hereof (including any provision 
within a single section, paragraph or sentence) are held by a court of 
competent jurisdiction to be invalid, void or otherwise unenforceable, and 
the remaining provisions shall remain enforceable to the fullest extent 
permitted by law.  Furthermore, to the fullest extent possible, the 
provisions of this Agreement (including without limitation each portion of 
this Agreement containing any provision held to be invalid, void or otherwise 
unenforceable, that is not itself invalid, void or unenforceable) shall be 

                                       -10-
<PAGE>

construed so as to give effect to the intent manifested by the provision held 
invalid, illegal or unenforceable.

     17.  CHOICE OF LAW.  This Agreement, and all rights, remedies, 
liabilities, powers and duties of the parties to this Agreement, shall be 
governed by and construed in accordance with the laws of the State of 
Delaware without regard to principles of conflicts of laws.

     18.  SUBROGATION.  In the event of payment under this Agreement, the 
Company shall be subrogated to the extent of such payment to all of the 
rights of recovery of Indemnitee, who shall execute all documents required 
and shall do all acts that may be necessary to secure such rights and to 
enable the Company effectively to bring suit to enforce such rights.

     19.  AMENDMENT AND TERMINATION.  No amendment, modification, termination 
or cancellation of this Agreement shall be effective unless it is in writing 
signed by both the parties hereto.  No waiver of any of the provisions of 
this Agreement shall be deemed to be or shall constitute a waiver of any 
other provisions hereof (whether or not similar), nor shall such waiver 
constitute a continuing waiver.

     20.  INTEGRATION AND ENTIRE AGREEMENT.  This Agreement sets forth the 
entire understanding between the parties hereto and supersedes and merges all 
previous written and oral negotiations, commitments, understandings and 
agreements relating to the subject matter hereof between the parties hereto.

     21.  NO CONSTRUCTION AS EMPLOYMENT AGREEMENT.  Nothing contained in this 
Agreement shall be construed as giving Indemnitee any right to be retained in 
the employ of the Company or any of its subsidiaries or affiliated entities.  

     IN WITNESS WHEREOF, the parties hereto have executed this Indemnification 
Agreement as of the date first above written.

HEALTHEON CORPORATION

By:
    ------------------------------
Name:
      ----------------------------
Title:
       ---------------------------
Address:




                                          AGREED TO AND ACCEPTED


                                          ------------------------------

                                       -11-

<PAGE>

                                                                    EXHIBIT 10.2
                                       
                              HEALTHEON CORPORATION

                                 1996 STOCK PLAN

               AS AMENDED ON MARCH 1, 1998 AND JULY 8, 1998

     1.   PURPOSES OF THE PLAN.  The purposes of this Stock Plan are to 
attract and retain the best available personnel for positions of substantial 
responsibility, to provide additional incentive to Employees and Consultants 
of the Company and its Subsidiaries and to promote the success of the 
Company's business.  Options granted under the Plan may be Incentive Stock 
Options or Nonstatutory Stock Options, as determined by the Administrator at 
the time of grant of an Option and subject to the applicable provisions of 
Section 422 of the Code and the regulations promulgated thereunder.  Stock 
Purchase Rights may also be granted under the Plan.

     2.   DEFINITIONS.  As used herein, the following definitions shall apply:

          (a)  "ADMINISTRATOR" means the Board or any of its Committees 
appointed pursuant to Section 4 of the Plan.

          (b)  "BOARD" means the Board of Directors of the Company.

          (c)  "CODE" means the Internal Revenue Code of 1986, as amended.

          (d)  "COMMITTEE"  means a Committee appointed by the Board of 
Directors in accordance with Section 4 of the Plan.

          (e)  "COMMON STOCK" means the Common Stock of the Company.

          (f)  "COMPANY" means Healtheon Corporation, a Delaware corporation.

          (g)  "CONSULTANT" means any person who is engaged by the Company or 
any Parent or Subsidiary to render consulting or advisory services and is 
compensated for such services, and any Director of the Company whether 
compensated for such services or not.  If the Company registers any class of 
any equity security pursuant to the Exchange Act, the term Consultant shall 
thereafter not include Directors who are not compensated for their services 
or are paid only a Director's fee by the Company.

          (h)  "CONTINUOUS STATUS AS AN EMPLOYEE OR CONSULTANT" means that 
the employment or consulting relationship with the Company, any Parent or 
Subsidiary is not interrupted or terminated.  Continuous Status as an 
Employee or Consultant shall not be considered interrupted in the case of (i) 
any leave of absence approved by the Company or (ii) transfers between 
locations of the Company or between the Company, its Parent, any Subsidiary, 
or any successor.  A leave of absence approved by the Company shall include 
sick 

<PAGE>

leave, military leave, or any other personal leave approved by an authorized 
representative of the Company.  For purposes of Incentive Stock Options, no 
such leave may exceed 90 days, unless reemployment upon expiration of such 
leave is guaranteed by statute or contract, including Company policies.  If 
reemployment upon expiration of a leave of absence approved by the Company is 
not so guaranteed, on the 91st day of such leave any Incentive Stock Option 
held by the Optionee shall cease to be treated as an Incentive Stock Option 
and shall be treated for tax purposes as a Nonstatutory Stock Option.

          (i)  "DIRECTOR" means a member of the Board of Directors of the 
Company.

          (j)  "EMPLOYEE" means any person, including Officers and Directors, 
employed by the Company or any Parent or Subsidiary of the Company.  The 
payment of a Director's fee by the Company shall not be sufficient to 
constitute "employment" by the Company.

          (k)  "EXCHANGE ACT" means the Securities Exchange Act of 1934, as 
amended.

          (l)  "FAIR MARKET VALUE" means, as of any date, the value of Common 
Stock determined as follows:

               (i)    If the Common Stock is listed on any established stock 
exchange or a national market system, including without limitation the Nasdaq 
National Market of the National Association of Securities Dealers, Inc. 
Automated Quotation ("NASDAQ") System, its Fair Market Value shall be the 
closing sales price for such stock (or the closing bid, if no sales were 
reported) as quoted on such exchange or system for the last market trading 
day prior to the time of determination and reported in The Wall Street 
Journal or such other source as the Administrator deems reliable;

               (ii)   If the Common Stock is quoted on the NASDAQ System (but 
not on the Nasdaq National Market thereof) or regularly quoted by a 
recognized securities dealer but selling prices are not reported, its Fair 
Market Value shall be the mean between the high bid and low asked prices for 
the Common Stock on the last market trading day prior to the day of 
determination; or

               (iii)  In the absence of an established market for the Common 
Stock, the Fair Market Value thereof shall be determined in good faith by the 
Administrator.

          (m)  "INCENTIVE STOCK OPTION" means an Option intended to qualify 
as an incentive stock option within the meaning of Section 422 of the Code.

          (n)  "NONSTATUTORY STOCK OPTION" means an Option not intended to 
qualify as an Incentive Stock Option.


                                      -2-

<PAGE>

          (o)  "OFFICER" means a person who is an officer of the Company 
within the meaning of Section 16 of the Exchange Act and the rules and 
regulations promulgated thereunder.

          (p)  "OPTION" means a stock option granted pursuant to the Plan.

          (q)  "OPTIONED STOCK" means the Common Stock subject to an Option 
or a Stock Purchase Right.

          (r)  "OPTIONEE" means an Employee or Consultant who receives an 
Option or Stock Purchase Right.

          (s)  "PARENT" means a "parent corporation," whether now or 
hereafter existing, as defined in Section 424(e) of the Code.

          (t)  "PLAN" means this 1996 Stock Plan.

          (u)  "RESTRICTED STOCK" means shares of Common Stock acquired 
pursuant to a grant of a Stock Purchase Right under Section 11 below.

          (v)  "SECTION 16(b)" means Section 16(b) of the Securities Exchange 
Act of 1934, as amended.

          (w)  "SHARE" means a share of the Common Stock, as adjusted in 
accordance with Section 12 below.

          (x)  "STOCK PURCHASE RIGHT" means a right to purchase Common Stock 
pursuant to Section 11 below.

          (y)  "SUBSIDIARY" means a "subsidiary corporation," whether now or 
hereafter existing, as defined in Section 424(f) of the Code.

     3.   STOCK SUBJECT TO THE PLAN.  Subject to the provisions of Section 12 
of the Plan, the maximum aggregate number of Shares which may be Optioned 
Stock and sold under the Plan is 15,000,000 Shares.  The Shares may be 
authorized but unissued, or reacquired Common Stock.

          If an Option or Stock Purchase Right expires or becomes 
unexercisable without having been exercised in full, or is surrendered 
pursuant to an option exchange program, the unpurchased Shares which were 
subject thereto shall become available for future grant or sale under the 
Plan (unless the Plan has terminated).  However, Shares that have actually 
been issued under the Plan, upon exercise of either an Option or Stock 
Purchase Right, shall not be returned to the Plan and shall not become 
available for future distribution under the Plan, except that if either (i) 
Shares of Restricted Stock or (ii) Shares issued upon exercise of unvested 
Options and subject to a repurchase right at cost, are repurchased by the 
Company at their original purchase 


                                      -3-

<PAGE>

price, and the original purchaser of such Shares under clause (i) or (ii) did 
not receive any benefits of ownership of such Shares, such Shares shall 
become available for future grant under the Plan.  For purposes of the 
preceding sentence, voting rights shall not be considered a benefit of Share 
ownership. 

     4.   ADMINISTRATION OF THE PLAN.

          (a)  INITIAL PLAN PROCEDURE.  Prior to the date, if any, upon which 
the Company becomes subject to the Exchange Act, the Plan shall be 
administered by the Board or a Committee appointed by the Board.

          (b)  PLAN PROCEDURE AFTER THE DATE, IF ANY, UPON WHICH THE COMPANY 
BECOMES SUBJECT TO THE EXCHANGE ACT.

               (i)    MULTIPLE ADMINISTRATIVE BODIES.  If permitted by Rule 
16b-3, the Plan may be administered by different bodies with respect to 
Directors, Officers and Employees who are neither Directors nor Officers.

               (ii)   ADMINISTRATION WITH RESPECT TO DIRECTORS AND OFFICERS.  
With respect to grants of Options and Stock Purchase Rights to Employees who 
are also Officers or Directors of the Company, the Plan shall be administered 
by (A) the Board if the Board may administer the Plan in compliance with the 
rules under Rule 16b-3 promulgated under the Exchange Act or any successor 
thereto ("Rule 16b-3") relating to the disinterested administration of 
employee benefit plans under which Section 16(b) exempt discretionary grants 
and awards of equity securities are to be made, or (B) a Committee designated 
by the Board to administer the Plan, which Committee shall be constituted to 
comply with the rules under Rule 16b-3 relating to the disinterested 
administration of employee benefit plans under which Section 16(b) exempt 
discretionary grants and awards of equity securities are to be made.  Once 
appointed, such Committee shall continue to serve in its designated capacity 
until otherwise directed by the Board.  From time to time the Board may 
increase the size of the Committee and appoint additional members thereof, 
remove members (with or without cause) and appoint new members in 
substitution therefor, fill vacancies, however caused, and remove all members 
of the Committee and thereafter directly administer the Plan, all to the 
extent permitted by the rules under Rule 16b-3 relating to the disinterested 
administration of employee benefit plans under which Section 16(b) exempt 
discretionary grants and awards of equity securities are to be made.

               (iii)  ADMINISTRATION WITH RESPECT TO OTHER EMPLOYEES AND 
CONSULTANTS. With respect to grants of Options and Stock Purchase Rights to 
Employees or Consultants who are neither Directors nor Officers of the 
Company, the Plan shall be administered by (A) the Board or (B) a Committee 
designated by the Board, which committee shall be constituted in such a 
manner as to satisfy the legal requirements relating to the administration of 
incentive stock option plans, if any, of Delaware corporate and securities 
laws, of the Code, and of any applicable stock exchange (the "Applicable 
Laws").  Once appointed, such Committee shall continue to serve in its 
designated capacity until otherwise directed by the Board.  From time to time 
the Board may 

                                      -4-

<PAGE>

increase the size of the Committee and appoint additional members thereof, 
remove members (with or without cause) and appoint new members in 
substitution therefor, fill vacancies, however caused, and remove all members 
of the Committee and thereafter directly administer the Plan, all to the 
extent permitted by the Applicable Laws.

          (c)  POWERS OF THE ADMINISTRATOR.  Subject to the provisions of the 
Plan and, in the case of a Committee, the specific duties delegated by the 
Board to such Committee, and subject to the approval of any relevant 
authorities, including the approval, if required, of any stock exchange upon 
which the Common Stock is listed, the Administrator shall have the authority 
in its discretion:

               (i)    to determine the Fair Market Value of the Common Stock, 
in accordance with Section 2(l) of the Plan;

               (ii)   to select the Consultants and Employees to whom Options 
and Stock Purchase Rights may from time to time be granted hereunder;

               (iii)  to determine whether and to what extent Options and 
Stock Purchase Rights or any combination thereof are granted hereunder;

               (iv)   to determine the number of Shares to be covered by each 
such award granted hereunder;

               (v)    to approve forms of agreement for use under the Plan;

               (vi)   to determine the terms and conditions of any award 
granted hereunder;

               (vii)  to determine whether and under what circumstances an 
Option may be settled in cash under subsection 9(f) instead of Common Stock;

               (viii) to reduce the exercise price of any Option to the then 
current Fair Market Value if the Fair Market Value of the Common Stock 
covered by such Option has declined since the date the Option was granted; and

               (ix)   to construe and interpret the terms of the Plan and 
awards granted pursuant to the Plan.

          (d)  EFFECT OF ADMINISTRATOR'S DECISION.  All decisions, 
determinations and interpretations of the Administrator shall be final and 
binding on all Optionees and any other holders of any Options or Stock 
Purchase Rights.

     5.   ELIGIBILITY.


                                      -5-

<PAGE>

          (a)  Nonstatutory Stock Options and Stock Purchase Rights may be 
granted to Employees and Consultants.  Incentive Stock Options may be granted 
only to Employees.  An Employee or Consultant who has been granted an Option 
or Stock Purchase Right may, if otherwise eligible, be granted additional 
Options or Stock Purchase Rights.

          (b)  Each Option shall be designated in the written option 
agreement as either an Incentive Stock Option or a Nonstatutory Stock Option. 
However, notwithstanding such designation, to the extent that the aggregate 
Fair Market Value of the Shares with respect to which Incentive Stock Options 
are exercisable for the first time by the Optionee during any calendar year 
(under all plans of the Company and any Parent or Subsidiary) exceeds 
$100,000, such Options shall be treated as Nonstatutory Stock Options.  For 
purposes of this Section 5(b), Incentive Stock Options shall be taken into 
account in the order in which they were granted.  The Fair Market Value of 
the Shares shall be determined as of the time the Option with respect to such 
Shares is granted.

          (c)  Neither the Plan nor any Option or Stock Purchase Right shall 
confer upon any Optionee any right with respect to continuation of his or her 
employment or consulting relationship with the Company, nor shall it 
interfere in any way with his or her right or the Company's right to 
terminate his or her employment or consulting relationship at any time, with 
or without cause.

          (d)  Upon the Company or a successor corporation issuing any class 
of common equity securities required to be registered under Section 12 of the 
Exchange Act or upon the Plan being assumed by a corporation having a class 
of common equity securities required to be registered under Section 12 of the 
Exchange Act, the following limitations shall apply to grants of Options and 
Stock Purchase Rights to Employees:

               (i)    No Employee shall be granted, in any fiscal year of the 
Company, Options and Stock Purchase Rights to purchase more than 500,000 
Shares.

               (ii)   In connection with his or her initial employment, an 
Employee may be granted Options and Stock Purchase Rights to purchase up to 
an additional 500,000 Shares which shall not count against the limit set 
forth in subsection (i) above.

               (iii)  The foregoing limitations shall be adjusted 
proportionately in connection with any change in the Company's capitalization 
as described in Section 12.

               (iv)   If an Option or Stock Purchase Right is cancelled in 
the same fiscal year of the Company in which it was granted (other than in 
connection with a transaction described in Section 12), the cancelled Option 
or Stock Purchase Right shall be counted against the limit set forth in 
subsection (i) above.  For this purpose, if the exercise price of an Option 
or Stock Purchase Right is reduced, such reduction will be treated as a 
cancellation of the Option or Stock Purchase Right and the grant of a new 
Option or Stock Purchase Right.


                                      -6-

<PAGE>

     6.   TERM OF PLAN.  The Plan shall become effective upon the earlier to 
occur of its adoption by the Board of Directors or its approval by the 
shareholders of the Company, as described in Section 18 of the Plan.  It 
shall continue in effect for a term of ten (10) years unless sooner 
terminated under Section 14 of the Plan.

     7.   TERM OF OPTION.  The term of each Option shall be the term stated 
in the Option Agreement; provided, however, that the term shall be no more 
than ten (10) years from the date of grant thereof.  In the case of an 
Incentive Stock Option granted to an Optionee who, at the time the Option is 
granted, owns stock representing more than ten percent (10%) of the voting 
power of all classes of stock of the Company or any Parent or Subsidiary, the 
term of the Option shall be five (5) years from the date of grant thereof or 
such shorter term as may be provided in the Option Agreement.

     8.   OPTION EXERCISE PRICE AND CONSIDERATION.

          (a)  The per share exercise price for the Shares to be issued upon 
exercise of an Option shall be such price as is determined by the 
Administrator, but shall be subject to the following:

               (i)    In the case of an Incentive Stock Option

                      (A)    granted to an Employee who, at the time of grant 
of such Option, owns stock representing more than ten percent (10%) of the 
voting power of all classes of stock of the Company or any Parent or 
Subsidiary, the per Share exercise price shall be no less than 110% of the 
Fair Market Value per Share on the date of grant.

                      (B)    granted to any other Employee, the per Share 
exercise price shall be no less than 100% of the Fair Market Value per Share 
on the date of grant.

               (ii)   In the case of a Nonstatutory Stock Option

                      (A)    granted to a person who, at the time of grant of 
such Option, owns stock representing more than ten percent (10%) of the 
voting power of all classes of stock of the Company or any Parent or 
Subsidiary, the per Share exercise price shall be no less than 110% of the 
Fair Market Value per Share on the date of the grant.

                      (B)    granted to any other person, the per Share 
exercise price shall be no less than 85% of the Fair Market Value per Share 
on the date of grant.


                                      -7-

<PAGE>

          (b)  The consideration to be paid for the Shares to be issued upon 
exercise of an Option, including the method of payment, shall be determined 
by the Administrator (and, in the case of an Incentive Stock Option, shall be 
determined at the time of grant).  Such consideration  may consist of (1) 
cash, (2) check, (3) promissory note, (4) other Shares which (x) in the case 
of Shares acquired upon exercise of an Option, have been owned by the 
Optionee for more than six months on the date of surrender, and (y) have a 
Fair Market Value on the date of surrender equal to the aggregate exercise 
price of the Shares as to which such Option shall be exercised, (5) delivery 
of a properly executed exercise notice together with such other documentation 
as the Administrator and a broker, if applicable, shall require to effect an 
exercise of the Option and delivery to the Company of the sale or loan 
proceeds required to pay the exercise price, or (6) any combination of the 
foregoing methods of payment.  In making its determination as to the type of 
consideration to accept, the Administrator shall consider if acceptance of 
such consideration may be reasonably expected to benefit the Company.

     9.   EXERCISE OF OPTION.

          (a)  PROCEDURE FOR EXERCISE; RIGHTS AS A SHAREHOLDER. Any Option 
granted hereunder shall be exercisable at such times and under such 
conditions as determined by the Administrator, including performance criteria 
with respect to the Company and/or the Optionee, and as shall be permissible 
under the terms of the Plan, but in no case at a rate of less than 20% per 
year over five (5) years from the date the Option is granted.

               An Option may not be exercised for a fraction of a Share.

               An Option shall be deemed to be exercised when written notice 
of such exercise has been given to the Company in accordance with the terms 
of the Option by the person entitled to exercise the Option and full payment 
for the Shares with respect to which the Option is exercised has been 
received by the Company.  Full payment may, as authorized by the 
Administrator, consist of any consideration and method of payment allowable 
under Section 8(b) hereof.  Until the issuance (as evidenced by the 
appropriate entry on the books of the Company or of a duly authorized 
transfer agent of the Company) of the stock certificate evidencing such 
Shares, no right to vote, receive dividends or any other rights as a 
shareholder shall exist with respect to the Optioned Stock, notwithstanding 
the exercise of the Option.  The Company shall issue (or cause to be issued) 
such stock certificate promptly upon exercise of the Option.  No adjustment 
shall be made for a dividend or other right for which the record date is 
prior to the date the stock certificate is issued, except as provided in 
Section 12 hereof.

               Exercise of an Option in any manner shall result in a decrease 
in the number of Shares which thereafter may be available, both for purposes 
of the Plan and for sale under the Option, by the number of Shares as to 
which the Option is exercised.


                                      -8-

<PAGE>

          (b)  TERMINATION OF EMPLOYMENT OR CONSULTING RELATIONSHIP. In the 
event of termination of an Optionee's Continuous Status as an Employee or 
Consultant (but not in the event of an Optionee's change of status from 
Employee to Consultant (in which case an Employee's Incentive Stock Option 
shall automatically convert to a Nonstatutory Stock Option on the date three 
(3) months and one day following such change of status) or from Consultant to 
Employee), such Optionee may, but only within such period of time as is 
determined by the Administrator, of at least thirty (30) days, with such 
determination in the case of an Incentive Stock Option not exceeding three 
(3) months after the date of such termination (but in no event later than the 
expiration date of the term of such Option as set forth in the Option 
Agreement), exercise his or her Option to the extent that the Optionee was 
entitled to exercise it at the date of such termination.  To the extent that 
the Optionee was not entitled to exercise the Option at the date of such 
termination, or if the Optionee does not exercise such Option to the extent 
so entitled within the time specified herein, the Option shall terminate.

          (c)  DISABILITY OF OPTIONEE.  In the event of termination of an 
Optionee's Continuous Status as an Employee or Consultant as a result of his 
or her disability, the Optionee may, but only within twelve (12) months from 
the date of such termination (and in no event later than the expiration date 
of the term of such Option as set forth in the Option Agreement), exercise 
the Option to the extent otherwise entitled to exercise it at the date of 
such termination.  If such disability is not a "disability" as such term is 
defined in Section 22(e)(3) of the Code, in the case of an Incentive Stock 
Option such Incentive Stock Option shall automatically cease to be treated as 
an Incentive Stock Option and shall be treated for tax purposes as a 
Nonstatutory Stock Option on the day three months and one day following such 
termination.  To the extent that the Optionee was not entitled to exercise 
the Option at the date of termination, or if the Optionee does not exercise 
such Option to the extent so entitled within the time specified herein, the 
Option shall terminate, and the Shares covered by such Option shall revert to 
the Plan.

          (d)  DEATH OF OPTIONEE.  In the event of the death of an Optionee, 
the Option may be exercised at any time within twelve (12) months following 
the date of death (but in no event later than the expiration of the term of 
such Option as set forth in the Notice of Grant) by the Optionee's estate or 
by a person who acquired the right to exercise the Option by bequest or 
inheritance, but only to the extent that the Optionee was entitled to 
exercise the Option on the date of death, or such greater extent as the 
Administrator may determine.  If, at the time of death, the Optionee was not 
entitled to exercise his or her entire Option and the Administrator does not 
determine a greater extent to which such Option may be exercised, the Shares 
covered by the unexercisable portion of the Option shall immediately revert 
to the Plan.  If, after the Optionee's death, the Optionee's estate or a 
person who acquires the right to exercise the Option by bequest or 
inheritance does not exercise the Option within the time specified herein, 
the Option shall terminate, and the Shares covered by such Option shall 
revert to the Plan.

          (e)  RULE 16b-3.  Options granted to persons subject to Section 
16(b) of the Exchange Act must comply with Rule 16b-3 and shall contain such 
additional conditions or 


                                      -9-

<PAGE>

restrictions as may be required thereunder to qualify for the maximum 
exemption from Section 16 of the Exchange Act with respect to Plan 
transactions.

          (f)  BUYOUT PROVISIONS.  The Administrator may at any time offer to 
buy out for a payment in cash or Shares, an Option previously granted, based 
on such terms and conditions as the Administrator shall establish and 
communicate to the Optionee at the time that such offer is made.

     10.  NON-TRANSFERABILITY OF OPTIONS AND STOCK PURCHASE RIGHTS.  Options 
and Stock Purchase Rights may not be sold, pledged, assigned, hypothecated, 
transferred, or disposed of in any manner other than by will or by the laws 
of descent or distribution and may be exercised, during the lifetime of the 
Optionee, only by the Optionee.

     11.  STOCK PURCHASE RIGHTS.

          (a)  RIGHTS TO PURCHASE.  Stock Purchase Rights may be issued 
either alone, in addition to, or in tandem with other awards granted under 
the Plan and/or cash awards made outside of the Plan.  After the 
Administrator determines that it will offer Stock Purchase Rights under the 
Plan, it shall advise the offeree in writing of the terms, conditions and 
restrictions related to the offer, including the number of Shares that such 
person shall be entitled to purchase, the price to be paid, and the time 
within which such person must accept such offer, which shall in no event 
exceed thirty (30) days from the date upon which the Administrator makes the 
determination to grant the Stock Purchase Right.  The offer shall be accepted 
by execution of a Restricted Stock purchase agreement in the form determined 
by the Administrator.  Shares purchased pursuant to the grant of a Stock 
Purchase Right shall be referred to herein as "Restricted Stock."

          (b)  REPURCHASE OPTION.  Unless the Administrator determines 
otherwise, the Restricted Stock purchase agreement shall grant the Company a 
repurchase option exercisable upon the voluntary or involuntary termination 
of the purchaser's employment with the Company for any reason (including 
death or disability).  The purchase price for Shares repurchased pursuant to 
the Restricted Stock purchase agreement shall be the original price paid by 
the purchaser and may be paid by cancellation of any indebtedness of the 
purchaser to the Company.  The repurchase option shall lapse at such rate as 
the Administrator may determine, but in no case at a rate of less than 20% 
per year over five years from the date of purchase.

          (c)  OTHER PROVISIONS.  The Restricted Stock purchase agreement 
shall contain such other terms, provisions and conditions not inconsistent 
with the Plan as may be determined by the Administrator in its sole 
discretion.  In addition, the provisions of Restricted Stock purchase 
agreements need not be the same with respect to each purchaser.

          (d)  RIGHTS AS A SHAREHOLDER.  Once the Stock Purchase Right is 
exercised, the purchaser shall have rights equivalent to those of a 
shareholder and shall be a shareholder when 


                                      -10-

<PAGE>

his or her purchase is entered upon the records of the duly authorized 
transfer agent of the Company.  No adjustment shall be made for a dividend or 
other right for which the record date is prior to the date the Stock Purchase 
Right is exercised, except as provided in Section 12 of the Plan.

     12.  ADJUSTMENTS UPON CHANGES IN CAPITALIZATION OR MERGER.

          (a)  CHANGES IN CAPITALIZATION.  Subject to any required action by 
the shareholders of the Company, the number of shares of Common Stock covered 
by each outstanding Option or Stock Purchase Right, and the number of shares 
of Common Stock which have been authorized for issuance under the Plan but as 
to which no Options or Stock Purchase Rights have yet been granted or which 
have been returned to the Plan upon cancellation or expiration of an Option 
or Stock Purchase Right, as well as the price per share of Common Stock 
covered by each such outstanding Option or Stock Purchase Right, shall be 
proportionately adjusted for any increase or decrease in the number of issued 
shares of Common Stock resulting from a stock split, reverse stock split, 
stock dividend, combination or reclassification of the Common Stock, or any 
other increase or decrease in the number of issued shares of Common Stock 
effected without receipt of consideration by the Company.  The conversion of 
any convertible securities of the Company shall not be deemed to have been 
"effected without receipt of consideration."  Such adjustment shall be made 
by the Board, whose determination in that respect shall be final, binding and 
conclusive.  Except as expressly provided herein, no issuance by the Company 
of shares of stock of any class, or securities convertible into shares of 
stock of any class, shall affect, and no adjustment by reason thereof shall 
be made with respect to, the number or price of shares of Common Stock 
subject to an Option or Stock Purchase Right.

          (b)  DISSOLUTION OR LIQUIDATION.  In the event of the proposed 
dissolution or liquidation of the Company, the Administrator shall notify the 
Optionee at least fifteen (15) days prior to such proposed action.  To the 
extent it has not been previously exercised, the Option or Stock Purchase 
Right shall terminate immediately prior to the consummation of such proposed 
action.

          (c)  MERGER.  In the event of a merger of the Company with or into 
another corporation, each outstanding Option or Stock Purchase Right may be 
assumed or an equivalent option or right may be substituted by such successor 
corporation or a parent or subsidiary of such successor corporation.  If, in 
such event, an Option or Stock Purchase Right is not assumed or substituted, 
the Option or Stock Purchase Right shall terminate as of the date of the 
closing of the merger.  For the purposes of this paragraph, the Option or 
Stock Purchase Right shall be considered assumed if, following the merger, 
the Option or Stock Purchase Right confers the right to purchase or receive, 
for each Share of Optioned Stock subject to the Option or Stock Purchase 
Right immediately prior to the merger, the consideration (whether stock, 
cash, or other securities or property) received in the merger by holders of 
Common Stock for each Share held on the effective date of the transaction 
(and if the holders are offered a choice of consideration, the type of 
consideration chosen by the holders of a majority of the outstanding Shares). 
If such 


                                      -11-

<PAGE>

consideration received in the merger is not solely common stock of the 
successor corporation or its Parent, the Administrator may, with the consent 
of the successor corporation, provide for the consideration to be received 
upon the exercise of the Option or Stock Purchase Right, for each Share of 
Optioned Stock subject to the Option or Stock Purchase Right, to be solely 
common stock of the successor corporation or its Parent equal in fair market 
value to the per share consideration received by holders of Common Stock in 
the merger.

     13.  TIME OF GRANTING OPTIONS AND STOCK PURCHASE RIGHTS.  The date of 
grant of an Option or Stock Purchase Right shall, for all purposes, be the 
date on which the Administrator makes the determination granting such Option 
or Stock Purchase Right, or such other date as is determined by the 
Administrator.  Notice of the determination shall be given to each Employee 
or Consultant to whom an Option or Stock Purchase Right is so granted within 
a reasonable time after the date of such grant.

     14.  AMENDMENT AND TERMINATION OF THE PLAN.

          (a)  AMENDMENT AND TERMINATION.  The Board may at any time amend, 
alter, suspend or discontinue the Plan, but no amendment, alteration, 
suspension or discontinuation shall be made which would impair the rights of 
any Optionee under any grant theretofore made, without his or her consent.  
In addition, to the extent necessary and desirable to comply with Rule 16b-3 
under the Exchange Act or with Section 422 of the Code (or any other 
applicable law or regulation, including the requirements of the NASD or an 
established stock exchange), the Company shall obtain shareholder approval of 
any Plan amendment in such a manner and to such a degree as required.

          (b)  EFFECT OF AMENDMENT OR TERMINATION.  Any such amendment or 
termination of the Plan shall not affect Options or Stock Purchase Rights 
already granted, and such Options and Stock Purchase Rights shall remain in 
full force and effect as if this Plan had not been amended or terminated, 
unless mutually agreed otherwise between the Optionee and the Administrator, 
which agreement must be in writing and signed by the Optionee and the Company.

     15.  CONDITIONS UPON ISSUANCE OF SHARES.  Shares shall not be issued 
pursuant to the exercise of an Option or Stock Purchase Right unless the 
exercise of such Option or Stock Purchase Right and the issuance and delivery 
of such Shares pursuant thereto shall comply with all relevant provisions of 
law, including, without limitation, the Securities Act of 1933, as amended, 
the Exchange Act, the rules and regulations promulgated thereunder, and the 
requirements of any stock exchange upon which the Shares may then be listed, 
and shall be further subject to the approval of counsel for the Company with 
respect to such compliance.

          As a condition to the exercise of an Option or Stock Purchase 
Right, the Company may require the person exercising such Option or Stock 
Purchase Right to represent and warrant at the time of any such exercise that 
the Shares are being purchased only for investment and without any present 
intention to sell or distribute such Shares if, in the opinion of counsel for 
the 


                                      -12-

<PAGE>

Company, such a representation is required by any of the aforementioned 
relevant provisions of law.

     16.  RESERVATION OF SHARES.  The Company, during the term of this Plan, 
shall at all times reserve and keep available such number of Shares as shall 
be sufficient to satisfy the requirements of the Plan.

          The inability of the Company to obtain authority from any 
regulatory body having jurisdiction, which authority is deemed by the 
Company's counsel to be necessary to the lawful issuance and sale of any 
Shares hereunder, shall relieve the Company of any liability in respect of 
the failure to issue or sell such Shares as to which such requisite authority 
shall not have been obtained.

     17.  AGREEMENTS.  Options and Stock Purchase Rights shall be evidenced 
by written agreements in such form as the Administrator shall approve from 
time to time.

     18.  SHAREHOLDER APPROVAL.  Continuance of the Plan shall be subject to 
approval by the shareholders of the Company within twelve (12) months before 
or after the date the Plan is adopted.  Such shareholder approval shall be 
obtained in the degree and manner required under applicable state and federal 
law and the rules of any stock exchange upon which the Common Stock is listed.

     19.  INFORMATION TO OPTIONEES AND PURCHASERS.  The Company shall provide 
to each Optionee and to each individual who acquires Shares pursuant to the 
Plan, not less frequently than annually during the period such Optionee or 
purchaser has one or more Options or Stock Purchase Rights outstanding, and, 
in the case of an individual who acquires Shares pursuant to the Plan, during 
the period such individual owns such Shares, copies of annual financial 
statements.  The Company shall not be required to provide such statements to 
key employees whose duties in connection with the Company assure their access 
to equivalent information.


                                      -13-

<PAGE>

                            HEALTHEON CORPORATION

                               1996 STOCK PLAN

                            STOCK OPTION AGREEMENT

     Unless otherwise defined herein, the terms defined in the Plan shall 
have the same defined meanings in this Option Agreement.

I.   NOTICE OF STOCK OPTION GRANT
     ----------------------------



     ____________________________

                             ____

     You have been granted an option to purchase Common Stock of the Company, 
subject to the terms and conditions of the Plan and this Option Agreement, as 
follows:

     Grant Number

     Date of Grant

     Vesting Commencement Date

     Exercise Price per Share    $

     Total Number of Shares Granted

     Total Exercise Price        $

     Type of Option:     X     Incentive Stock Option
                        ---

                        ---    Nonstatutory Stock Option

Term/Expiration Date:

VESTING SCHEDULE:

     You may exercise this Option, in whole or in part, according to the 
following vesting schedule:

<PAGE>

     25% of the Shares subject to the Option shall vest twelve months after 
the Vesting Commencement Date, and 1/48th of the Shares subject to the Option 
shall vest each month thereafter.

     TERMINATION PERIOD:

     You may exercise this Option for three (3) months after your employment 
or consulting relationship with the Company terminates, or for such longer 
period upon your death or disability as provided in the Plan.  If your status 
changes from Employee to Consultant or Consultant to Employee, this Option 
Agreement shall remain in effect.  In no case may you exercise this Option 
after the Term/Expiration Date as provided above.

II.  AGREEMENT

     1.   GRANT OF OPTION. Healtheon Corporation, a Delaware corporation (the 
"Company"), hereby grants to the Optionee named in the Notice of Grant (the 
"Optionee"), an option (the "Option") to purchase the total number of shares 
of Common Stock (the "Shares") set forth in the Notice of Grant, at the 
exercise price per share set forth in the Notice of Grant (the "Exercise 
Price") subject to the terms, definitions and provisions of the 1996 Stock 
Plan (the "Plan") adopted by the Company, which is incorporated herein by 
reference.  Unless otherwise defined herein, the terms defined in the Plan 
shall have the same defined meanings in this Option Agreement.

     If designated in the Notice of Grant as an Incentive Stock Option 
("ISO"), this Option is intended to qualify as an Incentive Stock Option as 
defined in Section 422 of the Code. Nevertheless, to the extent that it 
exceeds the $100,000 rule of Code Section 422(d), this Option shall be 
treated as a Nonstatutory Stock Option ("NSO").

     2.   EXERCISE OF OPTION.

     (a)   RIGHT TO EXERCISE.  This Option shall be exercisable during its 
term in accordance with the Vesting Schedule set out in the Notice of Grant 
and with the applicable provisions of the Plan and this Option Agreement.  In 
the event of Optionee's death, disability or other termination of the 
employment or consulting relationship, this Option shall be exercisable in 
accordance with the applicable provisions of the Plan and this Option 
Agreement.

     (b)   METHOD OF EXERCISE.  This Option shall be exercisable by written 
notice (in the form attached as EXHIBIT A) which shall state the election to 
exercise the Option, the number of Shares in respect of which the Option is 
being exercised, and such other representations and agreements as to the 
holder's investment intent with respect to such shares of Common Stock as may 
be required by the Company pursuant to the provisions of the Plan.  Such 
written notice shall be signed by the Optionee and shall be delivered in 
person or by certified mail to the Secretary of the Company.  The written 
notice shall be accompanied by payment of the Exercise Price.  This Option 
shall be deemed to be exercised upon receipt by the Company of such written 
notice accompanied by the Exercise Price.

<PAGE>

     No Shares will be issued pursuant to the exercise of an Option unless 
such issuance and such exercise shall comply with all relevant provisions of 
law and the requirements of any stock exchange upon which the Shares may then 
be listed.  Assuming such compliance, for income tax purposes the Shares 
shall be considered transferred to the Optionee on the date on which the 
Option is exercised with respect to such Shares.

     3.   OPTIONEE'S REPRESENTATIONS.  In the event the Shares purchasable 
pursuant to the exercise of this Option have not been registered under the 
Securities Act of 1933, as amended, at the time this Option is exercised, 
Optionee shall, if required by the Company, concurrently with the exercise of 
all or any portion of this Option, deliver to the Company his or her 
Investment Repre-sentation Statement in the form attached hereto as EXHIBIT 
B, and shall read the applicable rules of the Commissioner of Corporations 
attached to such Investment Representation Statement.

    4.    METHOD OF PAYMENT.  Payment of the Exercise Price shall be by any 
of the following, or a combination thereof, at the election of the Optionee:

          (a) cash;

          (b) check;

          (c)  if, at the time of exercise, the Company has registered its 
Common Stock under the Exchange Act, by surrender of other shares of Common 
Stock of the Company which (A) in the case of Shares acquired pursuant to the 
exercise of a Company option, have been owned by the Optionee for more than 
six (6) months on the date of surrender, and (B) have a Fair Market Value on 
the date of surrender equal to the Exercise Price of the Shares as to which 
the Option is being exercised; or

          (d) delivery of a properly executed exercise notice together with 
such other documentation as the Administrator and the broker, if applicable, 
shall require to effect an exercise of the Option and delivery to the Company 
of the sale or loan proceeds required to pay the Exercise Price.

     5.   RESTRICTIONS ON EXERCISE.  This Option may not be exercised until 
such time as the Plan has been approved by the stockholders of the Company, 
or if the issuance of such Shares upon such exercise or the method of payment 
of consideration for such shares would constitute a violation of any 
applicable federal or state securities or other law or regulation, including 
any rule under Part 207 of Title 12 of the Code of Federal Regulations 
("Regulation G") as promulgated by the Federal Reserve Board.

     6.   TERMINATION OF RELATIONSHIP.  In the event an Optionee's Continuous 
Status as an Employee or Consultant terminates, Optionee may, to the extent 
otherwise so entitled at the date of such termination (the "Termination 
Date"), exercise this Option during the Termination Period set out in the 
Notice of Grant.  To the extent that Optionee was not entitled to exercise 
this Option at the

                                       -3-

<PAGE>

date of such termination, or if Optionee does not exercise this Option within 
the time specified herein, the Option shall terminate.

     7.   DISABILITY OF OPTIONEE.  Notwithstanding the provisions of Section 
6 above, in the event of termination of an Optionee's consulting relationship 
or Continuous Status as an Employee as a result of his or her disability, 
Optionee may, but only within twelve (12) months from the date of such 
termination (and in no event later than the expiration date of the term of 
such Option as set forth in the Option Agreement), exercise the Option to the 
extent otherwise entitled to exercise it at the date of such termination; 
provided, however, that if such disability is not a "disability" as such term 
is defined in Section 22(e)(3) of the Code, in the case of an Incentive Stock 
Option such Incentive Stock Option shall cease to be treated as an Incentive 
Stock Option and shall be treated for tax purposes as a Nonstatutory Stock 
Option on the day three months and one day following such termination.  To 
the extent that Optionee was not entitled to exercise the Option at the date 
of termination, or if Optionee does not exercise such Option to the extent so 
entitled within the time specified herein, the Option shall terminate, and 
the Shares covered by such Option shall revert to the Plan.

     8.   DEATH OF OPTIONEE.  In the event of termination of Optionee's 
Continuous Status as an Employee or Consultant as a result of the death of 
Optionee, the Option may be exercised at any time within twelve (12) months 
following the date of death (but in no event later than the date of 
expiration of the term of this Option as set forth in Section 11 below), by 
Optionee's estate or by a person who acquired the right to exercise the 
Option by bequest or inheritance, but only to the extent the Optionee could 
exercise the Option at the date of death.

     9.   NON-TRANSFERABILITY OF OPTION.  This Option may not be transferred 
in any manner otherwise than by will or by the laws of descent or 
distribution and may be exercised during the lifetime of Optionee only by 
Optionee.  The terms of this Option shall be binding upon the executors, 
administrators, heirs, successors and assigns of the Optionee.

     10.  Optionee hereby agrees that if so requested by the Company or any 
representative of the underwriters in connection with any registration of the 
offering of any securities of the Company under the Securities Act, Optionee 
shall not sell or otherwise transfer any Shares or other securities of the 
Company during the 180-day period following the effective date of a 
registration statement of the Company filed under the Securities Act; 
provided, however, that such restriction shall only apply to the first 
registration statement of the Company to become effective under the 
Securities Act which include securities to be sold on behalf of the Company 
to the public in an underwritten public offering under the Securities Act.  
The Company may impose stop-transfer instructions with respect to securities 
subject to the foregoing restrictions until the end of such 180-day period.

     11.   TERM OF OPTION.  This Option may be exercised only within the term 
set out in the Notice of Grant, and may be exercised during such term only in 
accordance with the Plan and the terms of this Option.  The limitations set 
out in Section 7 of the Plan regarding Options designated as

                                       -4-

<PAGE>

Incentive Stock Options and Options granted to more than ten percent (10%) 
stockholders shall apply to this Option.

     12.  TAX CONSEQUENCES.  Set forth below is a brief summary as of the 
date of this Option of some of the federal and California tax consequences of 
exercise of this Option and disposition of the Shares.  THIS SUMMARY IS 
NECESSARILY INCOMPLETE, AND THE TAX LAWS AND REGULATIONS ARE SUBJECT TO 
CHANGE.  OPTIONEE SHOULD CONSULT A TAX ADVISER BEFORE EXERCISING THIS OPTION 
OR DISPOSING OF THE SHARES.

          (a) EXERCISE OF ISO.  If this Option qualifies as an ISO, there 
will be no regular federal income tax liability or California income tax 
liability upon the exercise of the Option, although the excess, if any, of 
the Fair Market Value of the Shares on the date of exercise over the Exercise 
Price will be treated as an adjustment to the alternative minimum tax for 
federal tax purposes and may subject the Optionee to the alternative minimum 
tax in the year of exercise.

          (b)  EXERCISE OF ISO FOLLOWING DISABILITY.  If the Optionee's 
Continuous Status as an Employee or Consultant terminates as a result of 
disability that is not total and permanent disability as defined in Section 
22(e)(3) of the Code, to the extent permitted on the date of termination, the 
Optionee must exercise an ISO within three months of such termination for the 
ISO to be qualified as an ISO.

          (c) EXERCISE OF NONSTATUTORY STOCK OPTION.  There may be a regular 
federal income tax liability and California income tax liability upon the 
exercise of a Nonstatutory Stock Option. The Optionee will be treated as 
having received compensation income (taxable at ordinary income tax rates) 
equal to the excess, if any, of the Fair Market Value of the Shares on the 
date of exercise over the Exercise Price.  If Optionee is an Employee or a 
former Employee, the Company will be required to withhold from Optionee's 
compensation or collect from Optionee and pay to the applicable taxing 
authorities including, if required, withholding for FICA, FUTA and similar 
statutes an amount in cash equal to a percentage of this compensation income 
at the time of exercise, and may refuse to honor the exercise and refuse to 
deliver Shares if such withholding amounts are not delivered at the time of 
exercise.

          (d)   DISPOSITION OF SHARES.  In the case of an NSO, if Shares are 
held for at least one year, any gain realized on disposition of the Shares 
will be treated as long-term capital gain for federal and California income 
tax purposes.  In the case of an ISO, if Shares transferred pursuant to the 
Option are held for at least one year after exercise and are disposed of at 
least two years after the Date of Grant, any gain realized on disposition of 
the Shares will also be treated as long-term capital gain for federal and 
California income tax purposes.  If Shares purchased under an ISO are 
disposed of within such one-year period or within two years after the Date of 
Grant, any gain realized on such disposition will be treated as compensation 
income (taxable at ordinary income rates) to the extent of the difference 
between the Exercise Price and the lesser of (1) the Fair Market Value of the 
Shares on the date of exercise, or (2) the sale price of the Shares.

                                       -5-

<PAGE>

          (e)   NOTICE OF DISQUALIFYING DISPOSITION OF ISO SHARES.  If the 
Option granted to Optionee herein is an ISO, and if Optionee sells or 
otherwise disposes of any of the Shares acquired pursuant to the ISO on or 
before the later of (1) the date two years after the Date of Grant, or (2) 
the date one year after the date of exercise, the Optionee shall immediately 
notify the Company in writing of such disposition.  Optionee agrees that 
Optionee may be subject to income tax withholding by the Company on the 
compensation income recognized by the Optionee.

     13.  ENTIRE AGREEMENT; GOVERNING LAW.  The Plan is incorporated herein 
by reference.  The Plan and this Option Agreement constitute the entire 
agreement of the parties with respect to the subject matter hereof and 
supersede in their entirety all prior undertakings and agreements of the 
Company and Optionee with respect to the subject matter hereof, and may not 
be modified adversely to the Optionee's interest except by means of a writing 
signed by the Company and Optionee.  This agreement is governed by California 
law except for that body of law pertaining to conflict of laws.

                                     HEALTHEON CORPORATION 
                                     a Delaware corporation

                                     By: ____________________________________

                                    Its: ____________________________________

     OPTIONEE ACKNOWLEDGES AND AGREES THAT THE VESTING OF SHARES PURSUANT TO 
THE OPTION HEREOF IS EARNED ONLY BY CONTINUING CONSULTANCY OR EMPLOYMENT AT 
THE WILL OF THE COMPANY (NOT THROUGH THE ACT OF BEING HIRED, BEING GRANTED 
THIS OPTION OR ACQUIRING SHARES HEREUNDER).  OPTIONEE FURTHER ACKNOWLEDGES 
AND AGREES THAT NOTHING IN THIS AGREEMENT, NOR IN THE COMPANY'S STOCK OPTION 
PLAN WHICH IS INCORPORATED HEREIN BY REFERENCE, SHALL CONFER UPON OPTIONEE 
ANY RIGHT WITH RESPECT TO CONTINUATION OF EMPLOYMENT OR CONSULTANCY BY THE 
COMPANY, NOR SHALL IT INTERFERE IN ANY WAY WITH OPTIONEE'S RIGHT OR THE 
COMPANY'S RIGHT TO TERMINATE OPTIONEE'S EMPLOYMENT OR CONSULTANCY AT ANY 
TIME, WITH OR WITHOUT CAUSE.

     Optionee acknowledges receipt of a copy of the Plan and represents that 
he is familiar with the terms and provisions thereof, and hereby accepts this 
Option subject to all of the terms and provisions thereof.  Optionee has 
reviewed the Plan and this Option in their entirety, has had an opportunity 
to obtain the advice of counsel prior to executing this Option and fully 
understands all provisions of the Option.  Optionee hereby agrees to accept 
as binding, conclusive and final all decisions or interpretations of the 
Administrator upon any questions arising under the Plan or this Option.  
Optionee further agrees to notify the Company upon any change in the 
residence address indicated below.

Dated:  _____________________                  ____________________________
                                                    Optionee


                                       -6-

<PAGE>

                                                  Residence Address:

                                                  _____________________________

                                                  _____________________________


                                       -7-

<PAGE>


                                      EXHIBIT A
                                      ---------

                                   1996 STOCK PLAN

                                   EXERCISE NOTICE

Healtheon Corporation
87 Encina Avenue
Palo Alto, CA 94301

Attention:  Secretary

     1.   EXERCISE OF OPTION.  Effective as of today, ___________, 19__, the 
undersigned ("Optionee") hereby elects to exercise Optionee's option to 
purchase _________ shares of the Common Stock (the "Shares") of Healtheon 
Corporation (the "Company") under and pursuant to the 1996 Stock Plan, as 
amended (the "Plan") and the [  ] Incentive [  ] Nonstatutory Stock Option 
Agreement dated ________, 19 ___ (the "Option Agreement").

     2.   REPRESENTATIONS OF OPTIONEE.  Optionee acknowledges that Optionee 
has received, read and understood the Plan and the Option Agreement and 
agrees to abide by and be bound by their terms and conditions.

     3.   RIGHTS AS STOCKHOLDER.  Until the stock certificate evidencing such 
Shares is issued (as evidenced by the appropriate entry on the books of the 
Company or of a duly authorized transfer agent of the Company), no right to 
vote or receive dividends or any other rights as a stockholder shall exist 
with respect to the Optioned Stock, notwithstanding the exercise of the 
Option.  The Company shall issue (or cause to be issued) such stock 
certificate promptly after the Option is exercised.  No adjustment will be 
made for a dividend or other right for which the record date is prior to the 
date the stock certificate is issued, except as provided in Section 12 of the 
Plan.

          Optionee shall enjoy rights as a stockholder until such time as 
Optionee disposes of the Shares or the Company and/or its assignee(s) 
exercises the Right of First Refusal hereunder. Upon such exercise, Optionee 
shall have no further rights as a holder of the Shares so purchased except 
the right to receive payment for the Shares so purchased in accordance with 
the provisions of this Agreement, and Optionee shall forthwith cause the 
certificate(s) evidencing the Shares so purchased to be surrendered to the 
Company for transfer or cancellation.

     4.   COMPANY'S RIGHT OF FIRST REFUSAL.  Before any Shares held by 
Optionee or any transferee (either being sometimes referred to herein as the 
"Holder") may be sold or otherwise transferred (including transfer by gift or 
operation of law), the Company or its assignee(s) shall have a right of first 
refusal to purchase the Shares on the terms and conditions set forth in this 
Section (the "Right of First Refusal").

<PAGE>

          (a) NOTICE OF PROPOSED TRANSFER.  The Holder of the Shares shall 
deliver to the Company a written notice (the "Notice") stating:  (i) the 
Holder's bona fide intention to sell or otherwise transfer such Shares; (ii) 
the name of each proposed purchaser or other transferee ("Proposed 
Transferee"); (iii) the number of Shares to be transferred to each Proposed 
Transferee; and (iv) the bona fide cash price or other consideration for 
which the Holder proposes to transfer the Shares (the "Offered Price"), and 
the Holder shall offer the Shares at the Offered Price to the Company or its 
assignee(s).

          (b) EXERCISE OF RIGHT OF FIRST REFUSAL.  At any time within thirty 
(30) days after receipt of the Notice, the Company and/or its assignee(s) 
may, by giving written notice to the Holder, elect to purchase all, but not 
less than all, of the Shares proposed to be transferred to any one or more of 
the Proposed Transferees, at the purchase price determined in accordance with 
subsection (c) below.

          (c) PURCHASE PRICE.  The purchase price ("Purchase Price") for the 
Shares purchased by the Company or its assignee(s) under this Section shall 
be the Offered Price.  If the Offered Price includes consideration other than 
cash, the cash equivalent value of the non-cash consideration shall be 
determined by the Board of Directors of the Company in good faith.

          (d) PAYMENT.  Payment of the Purchase Price shall be made, at the 
option of the Company or its assignee(s), in cash (by check), by cancellation 
of all or a portion of any outstanding indebtedness of the Holder to the 
Company (or, in the case of repurchase by an assignee, to the assignee), or 
by any combination thereof within 30 days after receipt of the Notice or in 
the manner and at the times set forth in the Notice.

          (e) HOLDER'S RIGHT TO TRANSFER.  If all of the Shares proposed in 
the Notice to be transferred to a given Proposed Transferee are not purchased 
by the Company and/or its assignee(s) as provided in this Section, then the 
Holder may sell or otherwise transfer such Shares to that Proposed Transferee 
at the Offered Price or at a higher price, provided that such sale or other 
transfer is consummated within 120 days after the date of the Notice and 
provided further that any such sale or other transfer is effected in 
accordance with any applicable securities laws and the Proposed Transferee 
agrees in writing that the provisions of this Section shall continue to apply 
to the Shares in the hands of such Proposed Transferee.  If the Shares 
described in the Notice are not transferred to the Proposed Transferee within 
such period, a new Notice shall be given to the Company, and the Company 
and/or its assignees shall again be offered the Right of First Refusal before 
any Shares held by the Holder may be sold or otherwise transferred.

          (f) EXCEPTION FOR CERTAIN FAMILY TRANSFERS.  Anything to the 
contrary contained in this Section notwithstanding, the transfer of any or 
all of the Shares during the Optionee's lifetime or on the Optionee's death 
by will or intestacy to the Optionee's immediate family or a trust for the 
benefit of the Optionee's immediate family shall be exempt from the 
provisions of this Section. "Immediate Family" as used herein shall mean 
spouse, lineal descendant or antecedent, father, mother, brother or sister.  
In such case, the transferee or other recipient shall receive and hold the 

<PAGE>

Shares so transferred subject to the provisions of this Section, and there 
shall be no further transfer of such Shares except in accordance with the 
terms of this Section.

          (g) TERMINATION OF RIGHT OF FIRST REFUSAL.  The Right of First 
Refusal shall terminate as to any Shares 90 days after the first sale of 
Common Stock of the Company to the general public pursuant to a registration 
statement filed with and declared effective by the Securities and Exchange 
Commission under the Securities Act of 1933, as amended.

     5.   TAX CONSULTATION.  Optionee understands that Optionee may suffer 
adverse tax consequences as a result of Optionee's purchase or disposition of 
the Shares.  Optionee represents that Optionee has consulted with any tax 
consultants Optionee deems advisable in connection with the purchase or 
disposition of the Shares and that Optionee is not relying on the Company for 
any tax advice.

     6.   RESTRICTIVE LEGENDS AND STOP-TRANSFER ORDERS.

          (a) LEGENDS.  Optionee understands and agrees that the Company 
shall cause the legends set forth below or legends substantially equivalent 
thereto, to be placed upon any certificate(s) evidencing ownership of the 
Shares together with any other legends that may be required by the Company or 
by state or federal securities laws:

          THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER 
          THE SECURITIES ACT OF 1933 (THE "ACT") AND MAY NOT BE OFFERED, 
          SOLD OR OTHERWISE TRANSFERRED, PLEDGED OR  HYPOTHECATED UNLESS
          AND UNTIL REGISTERED UNDER THE ACT OR, IN THE OPINION OF
          COMPANY COUNSEL SATISFACTORY TO THE ISSUER OF THESE SECURITIES,
          SUCH OFFER, SALE OR TRANSFER, PLEDGE OR HYPOTHECATION IS IN
          COMPLIANCE THEREWITH.

          THE SHARES REPRESENTED BY THIS CERTIFICATE ARE SUBJECT TO CERTAIN 
          RESTRICTIONS ON TRANSFER AND A RIGHT OF FIRST REFUSAL HELD BY THE 
          ISSUER OR ITS ASSIGNEE(S) AS SET FORTH IN THE EXERCISE NOTICE 
          BETWEEN THE ISSUER AND THE ORIGINAL HOLDER OF THESE SHARES, A COPY 
          OF WHICH MAY BE OBTAINED AT THE PRINCIPAL OFFICE OF THE ISSUER.  
          SUCH TRANSFER RESTRICTIONS AND RIGHT OF FIRST REFUSAL ARE BINDING 
          ON TRANSFEREES OF THESE SHARES.

          IT IS UNLAWFUL TO CONSUMMATE A SALE OR TRANSFER OF THIS SECURITY, OR 
          ANY INTEREST THEREIN, OR TO

                                       -3-

<PAGE>



          RECEIVE ANY CONSIDERATION THEREFOR, WITHOUT THE PRIOR WRITTEN CONSENT
          OF THE COMMISSIONER OF CORPORATIONS OF THE STATE OF CALIFORNIA,
          EXCEPT AS PERMITTED IN THE COMMISSIONER'S RULES.

          Optionee understands that transfer of the Shares may be restricted 
by Section 260.141.11 of the Rules of the California Corporations Commissioner, 
a copy of which is attached to EXHIBIT B, the Investment Representation
Statement.


          (b) STOP-TRANSFER NOTICES.  Optionee agrees that, in order to ensure 
compliance with the restrictions referred to herein, the Company may issue 
appropriate "stop transfer" instruc-tions to its transfer agent, if any, and 
that, if the Company  transfers its own securities, it may make appropriate 
notations to the same effect in its own records.

          (c) REFUSAL TO TRANSFER.  The Company shall not be required (i) to
transfer on its books any Shares that have been sold or otherwise transferred
in violation of any of the provisions of this Agreement or (ii) to treat as 
owner of such Shares or to accord the right to vote or pay dividends to any 
purchaser or other transferee to whom such Shares shall have been so 
transferred.

     7.   SUCCESSORS AND ASSIGNS.  The Company may assign any of its rights
under this Agreement to single or multiple assignees, and this Agreement shall 
inure to the benefit of the successors and assigns of the Company.  Subject 
to the restrictions on transfer herein set forth, this Agreement shall be 
binding upon Optionee and his or her heirs, executors, administrators, 
successors and assigns.

     8.   INTERPRETATION.  Any dispute regarding the interpretation of this 
Agreement shall be submitted by Optionee or by the Company forthwith to the 
Company's Board of Directors or the committee thereof that administers the 
Plan, which shall review such dispute at its next regular meeting.  The 
resolution of such a dispute by the Board or committee shall be final and 
binding on the Company and on Optionee.

     9.   GOVERNING LAW; SEVERABILITY.  This Agreement shall be governed by
and construed in accordance with the laws of the State of California excluding 
that body of law pertaining to conflicts of law.  Should any provision of 
this Agreement be determined by a court of law to be illegal or 
unenforceable, the other provisions shall nevertheless remain effective and 
shall remain enforceable.

     10.  NOTICES.  Any notice required or permitted hereunder shall be given
in writing and shall be deemed effectively given upon personal delivery or
upon deposit in the United States mail by certified mail, with postage and
fees prepaid, addressed to the other party at its address as shown below
beneath its signature, or to such other address as such party may designate in 
writing from time to time to the other party.

                                       -4-

<PAGE>

     11.  FURTHER INSTRUMENTS.  The parties agree to execute such further 
instruments and to take such further action as may be reasonably necessary to 
carry out the purposes and intent of this Agreement.

     12.  DELIVERY OF PAYMENT.  Optionee herewith delivers to the Company the 
full Exercise Price for the Shares.

     13.  ENTIRE AGREEMENT.  The Plan and Notice of Grant/Option Agreement 
are incorporated herein by reference.  This Agreement, the Plan, the Option 
Agreement and the Investment Representation Statement constitute the entire 
agreement of the parties with respect to the subject matter hereof and 
supersede in their entirety all prior undertakings and agreements of the 
Company and Optionee with respect to the subject matter hereof, and may not 
be modified adversely to the Optionee's interest except by means of a writing 
signed by the Company and Optionee

Submitted by:                               Accepted by:

OPTIONEE:                                   HEALTHEON CORPORATION

                                            By: ______________________

       (Signature)                          Its: _____________________

ADDRESS:                                    ADDRESS:

___________________________                 87 Encina Avenue
___________________________                 Palo Alto, CA 94301

                                       -5-

<PAGE>


                                     EXHIBIT B
                                     ---------

                         INVESTMENT REPRESENTATION STATEMENT

OPTIONEE     :

COMPANY      : HEALTHEON CORPORATION

SECURITY     : COMMON STOCK

AMOUNT       :  SHARES

DATE         :

In connection with the purchase of the above-listed Securities, the 
undersigned Optionee represents to the Company the following:

          (a)  Optionee is aware of the Company's business affairs and 
financial condition and has acquired sufficient information about the Company 
to reach an informed and knowledgeable decision to acquire the Securities.  
Optionee is acquiring these Securities for investment for Optionee's own 
account only and not with a view to, or for resale in connection with, any 
"distribution" thereof within the meaning of the Securities Act of 1933, as 
amended (the "Securities Act").

          (b)  Optionee acknowledges and understands that the Securities 
constitute "restricted securities" under the Securities Act and have not been 
registered under the Securities Act in reliance upon a specific exemption 
therefrom, which exemption depends upon, among other things, the bona fide 
nature of Optionee's investment intent as expressed herein.  In this 
connection, Optionee understands that, in the view of the Securities and 
Exchange Commission, the statutory basis for such exemption may be 
unavailable if Optionee's representation was predicated solely upon a present 
intention to hold these Securities for the minimum capital gains period 
specified under tax statutes, for a deferred sale, for or until an increase 
or decrease in the market price of the Securities, or for a period of one 
year or any other fixed period in the future.  Optionee further understands 
that the Securities must be held indefinitely unless they are subsequently 
registered under the Securities Act or an exemption from such registration is 
available.  Optionee further acknowledges and understands that the Company is 
under no obligation to register the Securities.  Optionee understands that 
the certificate evidencing the Securities will be imprinted with a legend 
which prohibits the transfer of the Securities unless they are registered or 
such registration is not required in the opinion of counsel satisfactory to 
the Company, a legend prohibiting their transfer without the consent of the 
Commissioner of Corporations of the State of California and any other legend 
required under applicable state securities laws.

<PAGE>

          (c)   Optionee is familiar with the provisions of Rule 701 and Rule 
144, each promulgated under the Securities Act, which, in substance, permit 
limited public resale of "restricted securities" acquired, directly or 
indirectly from the issuer thereof, in a non-public offering subject to the 
satisfaction of certain conditions.  Rule 701 provides that if the issuer 
qualifies under Rule 701 at the time of the grant of the Option to the 
Optionee, the exercise will be exempt from registration under the Securities 
Act.  In the event the Company becomes subject to the reporting requirements 
of Section 13 or 15(d) of the Securities Exchange Act of 1934, ninety (90) 
days thereafter (or such longer period as any market stand-off agreement may 
require) the Securities exempt under Rule 701 may be resold, subject to the 
satisfaction of certain of the conditions specified by Rule 144, including:  
(1) the resale being made through a broker in an unsolicited "broker's 
transaction" or in transactions directly with a market maker (as said term is 
defined under the Securities Exchange Act of 1934); and, in the case of an 
affiliate, (2) the availability of certain public information about the 
Company, (3) the amount of Securities being sold during any three month 
period not exceeding the limitations specified in Rule 144(e), and (4) the 
timely filing of a Form 144, if applicable.

     In the event that the Company does not qualify under Rule 701 at the 
time of grant of the Option, then the Securities may be resold in certain 
limited circumstances subject to the provisions of Rule 144, which requires 
the resale to occur not less than one year after the later of the date the 
Securities were sold by the Company or the date the Securities were sold by 
an affiliate of the Company, within the meaning of Rule 144; and, in the case 
of acquisition of the Securities by an affiliate, or by a non-affiliate who 
subsequently holds the Securities less than two years, the satisfaction of 
the conditions set forth in sections (1), (2), (3) and (4) of the paragraph 
immediately above.

          (d) Optionee hereby agrees that if so requested by the Company or 
any representative of the underwriters in connection with any registration of 
the offering of any securities of the Company under the Securities Act, 
Optionee shall not sell or otherwise transfer any Shares or other securities 
of the Company during the 180-day period following the effective date of a 
registration statement of the Company filed under the Securities Act; 
provided, however, that such restriction shall only apply to the first 
registration statement of the Company to become effective under the 
Securities Act which include securities to be sold on behalf of the Company 
to the public in an underwritten public offering under the Securities Act.  
The Company may impose stop-transfer instructions with respect to securities 
subject to the foregoing restrictions until the end of such 180-day period.

          (e) Optionee further understands that in the event all of the 
applicable requirements of Rule 701 or 144 are not satisfied, registration 
under the Securities Act, compliance with Regulation A, or some other 
registration exemption will be required; and that, notwithstanding the fact 
that Rules 144 and 701 are not exclusive, the Staff of the Securities and 
Exchange Commission has expressed its opinion that persons proposing to sell 
private placement securities other than in a registered offering and 
otherwise than pursuant to Rules 144 or 701 will have a substantial burden of 
proof in establishing that an exemption from registration is available for 
such offers or sales, and that such persons and their respective brokers who 
participate in such

                                       -2-

<PAGE>

transactions do so at their own risk.  Optionee understands that no 
assurances can be given that any such other registration exemption will be 
available in such event.

          (f)  Optionee understands that the certificate evidencing the 
Securities will be imprinted with a legend which prohibits the transfer of 
the Securities without the consent of the Commissioner of Corporations of 
California.  Optionee has read the applicable Commissioner's Rules with 
respect to such restriction, a copy of which is attached.

                                            Signature of Optionee:

                                            ___________________________________

                                            Date:_______________________, 19___

                                       -3-

<PAGE>


                                  ATTACHMENT 1
              STATE OF CALIFORNIA - CALIFORNIA ADMINISTRATIVE CODE

          Title 10.  Investment - Chapter 3.  Commissioner of Corporations

     260.141.11:  RESTRICTION ON TRANSFER.  (a)  The issuer of any security 
upon which a restriction on transfer has been imposed pursuant to Sections 
260.102.6, 260.141.10 or 260.534 shall cause a copy of this section to be 
delivered to each issuee or transferee of such security at the time the 
certificate evidencing the security is delivered to the issuee or transferee.

     (b) It is unlawful for the holder of any such security to consummate a 
sale or transfer of such security, or any interest therein, without the prior 
written consent of the Commissioner (until this condition is removed pursuant 
to Section 260.141.12 of these rules), except:

         (1) to the issuer;

         (2) pursuant to the order or process of any court;

         (3) to any person described in Subdivision (i) of Section 25102 of 
the Code or Section 260.105.14 of these rules;

         (4) to the transferor's ancestors, descendants or spouse, or any 
custodian or trustee for the account of the transferor or the transferor's 
ancestors, descendants, or spouse; or to a transferee by a trustee or 
custodian for the account of the transferee or the transferee's ancestors, 
descendants or spouse;

         (5) to holders of securities of the same class of the same issuer;

         (6) by way of gift or donation inter vivos or on death;

         (7) by or through a broker-dealer licensed under the Code (either 
acting as such or as a finder) to a resident of a foreign state, territory or 
country who is neither domiciled in this state to the knowledge of the 
broker-dealer, nor actually present in this state if the sale of such 
securities is not in violation of any securities law of the foreign state, 
territory or country concerned;

         (8) to a broker-dealer licensed under the Code in a principal 
transaction, or as an underwriter or member of an underwriting syndicate or 
selling group;

         (9) if the interest sold or transferred is a pledge or other lien 
given by the purchaser to the seller upon a sale of the security for which 
the Commissioner's written consent is obtained or under this rule not 
required;

         (10) by way of a sale qualified under Sections 25111, 25112, 25113 
or 25121 of the Code, of the securities to be transferred, provided that no 
order under Section 25140 or subdivision (a) of Section 25143 is in effect 
with respect to such qualification;

         (11) by a corporation to a wholly owned subsidiary of such 
corporation, or by a wholly owned subsidiary of a corporation to such 
corporation;

         (12) by way of an exchange qualified under Section 25111, 25112 or 
25113 of the Code, provided that no order under Section 25140 or subdivision 
(a) of Section 25143 is in effect with respect to such qualification;

         (13) between residents of foreign states, territories or countries 
who are neither domiciled nor actually present in this state;

         (14) to the State Controller pursuant to the Unclaimed Property Law 
or to the administrator of the unclaimed property law of another state; or

         (15) by the State Controller pursuant to the Unclaimed Property Law 
or by the administrator of the unclaimed property law of another state if, in 
either such case, such person (i) discloses to potential purchasers at the 
sale that transfer of the securities is restricted under this rule, (ii) 
delivers to each purchaser a copy of this rule, and (iii) advises the 
Commissioner of the name of each purchaser;

         (16) by a trustee to a successor trustee when such transfer does not 
involve a change in the beneficial ownership of the securities;

         (17) by way of an offer and sale of outstanding securities in an 
issuer transaction that is subject to the qualification requirement of 
Section 25110 of the Code but exempt from that qualification requirement by 
subdivision (f) of Section 25102; provided that any such transfer is on the 
condition that any certificate evidencing the security issued to such 
transferee shall contain the legend required by this section.

     (c) The certificates representing all such securities subject to such a 
restriction on transfer, whether upon initial issuance or upon any transfer 
thereof, shall bear on their face a legend, prominently stamped or printed 
thereon in capital letters of not less than 10-point size, reading as follows:

         "IT IS UNLAWFUL TO CONSUMMATE A SALE OR TRANSFER OF THIS SECURITY, OR
         ANY INTEREST THEREIN, OR TO RECEIVE ANY CONSIDERATION THEREFOR,
         WITHOUT THE PRIOR WRITTEN CONSENT OF THE COMMISSIONER OF CORPORATIONS
         OF THE STATE OF CALIFORNIA, EXCEPT AS PERMITTED IN THE COMMISSIONER'S
         RULES."




<PAGE>
                                                                 EXHIBIT 10.13
                                       
                        CONFIDENTIAL TREATMENT REQUESTED

                         Services and License Agreement
                          Between ActaMed Corporation
                       and United HealthCare Corporation


       This Services and License Agreement (the "Agreement") is made and 
entered into as of April 4, 1996 (the "Effective Date"), by and between 
ActaMed Corporation ("ActaMed") and United HealthCare Corporation ("UHC"), 
for itself and on behalf of each of the Managed Plans which has given its 
written consent (as hereinafter defined).
                                       
                                   RECITALS

       A.      ActaMed is in the business of providing electronic data 
interchange products and services to the health care industry.

       B.      UHC, for itself on and behalf of its Affiliates (including The 
MetraHealth Companies, Inc.), and other entities that UHC may hereafter 
acquire, and on behalf of the health maintenance organizations identified in 
Exhibit A hereto that are managed by UHC or an Affiliate thereof and which 
have given their consent to be bound by this Agreement (which plans which 
give their consent are referred to herein as the "Managed Plans"), desires to 
obtain from ActaMed certain software and materials and access to the Network, 
on the terms and conditions set forth below.

       NOW, THEREFORE, in consideration of the premises and the mutual 
promises contained herein, the parties agree as follows.

       1.      DEFINITIONS.

       1.1     "Affiliate" means with respect to a party, an entity directly 
or indirectly controlling, controlled by or under common control with such 
party where control means the ownership or control, directly or indirectly, 
of more than fifty percent of all of the voting power of the shares (or other 
securities or rights) entitled to vote for the election of directors or other 
governing authority, as of the Effective Date or hereafter during the term of 
this Agreement; provided that such entity shall be considered an Affiliate 
only for the time during which such control exists.  The Managed Plans shall 
be considered to be Affiliates of UHC.

       1.2     "Cosmos" means the computer program owned by UHC which is 
commonly known as Cosmos, and which UHC operates for health care claims 
adjudication and other business functions.


[*] CONFIDENTIAL TREATMENT REQUESTED

                                      1
<PAGE>

       1.3     "Enhancements" means changes or additions to application 
software and documentation that improve existing Functions, add new 
Functions, or improve performance through changes in the system design or 
coding.

       1.4     "Functions" means the tasks employed by users to exchange 
information within the Network.

       1.5     "Licensed Materials" shall mean the Network Software, the 
ORBIT software (i.e., the ProviderLink billing and registration system), and 
the documentation, training materials, and other materials related to the 
Network Software or the Network which are listed on Exhibit B attached to 
this Agreement.  All updates and new versions of such materials are also 
included in the definition of "Licensed Materials".

       1.6     "Network" means the electronic data interchange ("EDI") system 
and network operated by ActaMed, which includes the Network Software, 
including any future versions of the EDI network or products substituting for 
it which include the basic functionality of the Network Software and network 
as of the Effective Date, regardless of the name under which it is marketed.  
The term "Network" specifically excludes any telecommunications network.

       1.7     "Network Software" means the personal computer version of the 
ProviderLink and ActaLink presentation and network software programs, and all 
updates to them, which are licensed to users and which allow access to the 
Network for the transmission and reception of information.

       1.8     "Provider" means a provider of health care services, which is 
not UHC, an Affiliate of UHC, or operated by UHC.

       1.9     "UHC" means United HealthCare Corporation and its Affiliates.

       2.      LICENSE AND NETWORK ACCESS.

       2.1     ActaMed grants UHC the nonexclusive, nontransferable right to 
use the Licensed Materials, to reproduce and modify those of the Licensed 
Materials so designated on Exhibit B, and to access and utilize the services 
of the Network, for UHC's internal use, on the terms set forth in this 
Agreement. UHC's internal use shall include use by and/or on behalf of (a) 
UHC or any UHC Affiliate; and (b) third parties that are purchasers of UHC's 
products and/or services, including management services, as well as UHC's 
health care service providers (including, without limitation, NYH Health Plan 
Services, Inc. ("NYHHPS") and its subsidiaries and/or affiliates pursuant to 
the First Restated Administrative Services Agreement between UHC and NYHHPS, 
dated September 1, 1994, as amended from time to time).  UHC's access to use 
the Network will be on the same operational basis which ActaMed offers the 
Network to its other customers of the Network, except as otherwise provided 
in this Agreement.


                                      2
<PAGE>

       2.2     UHC shall submit all permitted modifications it makes to the 
Licensed Materials for ActaMed's approval, prior to distributing the 
modifications.  If ActaMed does not respond to UHC within fourteen days after 
UHC submits modifications to ActaMed for approval, the modifications shall be 
deemed approved.  On the copies of the Licensed Materials UHC makes, UHC 
shall reproduce all notices or legends appearing on the original copy, 
including the copyright notice.  All copies of the Licensed Materials made by 
UHC can be used only as permitted under this Agreement.  At any time within 
ten days after ActaMed's written request, UHC shall inform ActaMed of the 
number and location of all copies of the Licensed Materials UHC has made.

       2.3     UHC shall have the right to install the Network Software at 
any UHC location and at any locations of Providers working with UHC, and to 
connect such locations to the Network.  ActaMed will install the Network 
Software at UHC or Provider sites and connect them to the Network, when 
mutually agreed by the parties.  UHC and ActaMed will do agreed upon 
installations in a timely manner. UHC and ActaMed must continue to use the 
installation procedures developed by UHC or other mutually agreeable 
installation procedures (except as provided in any agreements directly 
between ActaMed and a UHC health plan, such as UHC Georgia) for such sites.  
UHC shall not be obligated under paragraph 12.1 to pay a monthly site fee or 
transaction fees for any Provider connected to the Network by ActaMed, unless 
UHC has agreed to be responsible for such Provider and fees.

       2.4     Any development work on the Licensed Materials or the Network 
which was in progress on the date of this Agreement, will be provided to UHC 
upon completion and included within the definition of "Licensed Materials", 
at no charge to UHC, if it is set forth on Exhibit C attached to this 
Agreement.

       2.5     UHC shall not act as a clearinghouse for health care claims 
going to payors other than UHC, other than as required by a UHC client, such 
as UBS misdirected Railroad Retirement claims and Medicare cross-over claims.

       2.6     If UHC desires to and ActaMed agrees that UHC may use and 
implement the Licensed Materials or the Network technology outside North 
America, UHC and ActaMed shall mutually agree upon the terms and conditions 
of such use and implementation.

       2.7     Except as otherwise provided in this Agreement, ActaMed 
provides the Licensed Materials to UHC on an "AS IS, WHERE IS" basis.  
ACTAMED EXPRESSLY DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, RELATING TO 
THE LICENSED MATERIALS, INCLUDING, BUT NOT LIMITED TO, THE WARRANTIES OF 
TITLE, NONINFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
OR USE.

       2.8     Except as otherwise provided in this Agreement, UHC shall not 
(a) copy, reproduce, modify, or excerpt any of the Licensed Materials for any 
purpose; (b) distribute, 


                                      3
<PAGE>

rent, sublicense, share, transfer or lease the Licensed Materials or access 
to the Network, to any person or entity which is not a party to this 
Agreement; or (c) attempt to reverse engineer or otherwise obtain copies of 
the source code for the Licensed Materials.

       2.9     UHC acknowledges that the Licensed Materials may contain 
embedded runtime modules of products licensed to ActaMed by Sybase, Inc. 
("Sybase") and, accordingly, that Sybase as an interested third party 
beneficiary of this Agreement, may enforce this Agreement directly against 
UHC and shall have no liability to UHC.  In addition, UHC agrees that Sybase 
shall have the right to direct a recognized independent accounting firm to 
conduct, during normal business hours, an audit of appropriate records of UHC 
to verify (a) the number of copies of the Licensed Materials in use by UHC, 
and the computer systems on which such copies are installed, the number of 
processors in such computer systems, and the number of users using such 
copies; and (b) UHC's compliance with this Agreement.  Representatives of the 
auditing firm shall protect the confidentiality of UHC's confidential 
information and abide by UHC's reasonable security regulations while on UHC's 
premises.

       2.10    ActaMed agrees that ActaMed does not own and cannot use, 
distribute or publish any data transmitted over the Network either to or from 
UHC, except to the extent such data originates with ActaMed.  Notwithstanding 
the above, ActaMed shall have the right to collect and distribute data 
transmitted over the Network back to the originator of such data.

       3.      MARKETING AND IMPLEMENTATION OF NETWORK PRODUCTS.

       3.1     UHC will identify the business needs, goals and objectives of 
UHC for ActaMed, and will establish targets for the number and volume of 
Providers submitting electronic transactions.  These numbers will be 
estimates, and not guarantees, for any amount of business for ActaMed.  UHC 
will provide this information to ActaMed no less often than quarterly, and 
shall respond to additional requests for information within thirty days of 
ActaMed's request. The parties shall mutually agree upon any other 
information or data which UHC may give to ActaMed under this Agreement.

       3.2     ActaMed will appoint at least one representative dedicated to 
the UHC account, who will have decision making capabilities for ActaMed.  
This person will attend planning meetings with UHC, keep UHC updated on 
national trends in EDI, and consult with UHC regarding ActaMed's software and 
network strategy.  ActaMed will provide a representative to WEDI and ANSI to 
represent UHC, upon UHC's request.  UHC shall also designate a representative 
to work with ActaMed and to coordinate UHC's activities with ActaMed, who 
will have decision making capabilities for UHC.  This person will attend 
planning meetings with ActaMed, keep ActaMed updated on technical 
developments with respect to Cosmos, and coordinate UHC's activities with 
ActaMed.  J.R. Hughes will be the initial representative for ActaMed and Joy 
Bahnemann will be the initial representative for UHC.  Each party will 
consult with the other before changing its designated representative.


                                      4
<PAGE>

       3.3     Exhibit D to this Agreement specifies the reports UHC will 
deliver to ActaMed and ActaMed will deliver to UHC daily, weekly, monthly, 
quarterly and annually.  The parties shall also provide ad hoc reports to 
each other at no cost to the requesting party.

       3.4     ActaMed will submit to UHC for its input and comments a 
comprehensive disaster recovery plan and documentation within 90 days after 
the date of this Agreement.  The plan shall include testing of the plan no 
less often than annually and agreed upon time constraints within which full 
recovery will be expected.  ActaMed will accept comments from UHC and make 
reasonable commercial efforts within the context of the Network to 
incorporate such comments.  ActaMed will use its best efforts to establish a 
hot site under its disaster recovery plan which is not at a UHC data center 
within one year after the date of this Agreement.  ActaMed will submit 
amended disaster recovery plans to UHC, for its information and input, any 
time that ActaMed makes substantial changes to its plan.  ActaMed will 
participate in UHC's annual test of the UHC disaster recovery plan, with up 
to forty hours of ActaMed personnel time at no cost to UHC.  For any 
additional time beyond the forty hours which UHC requests from ActaMed for 
this purpose, UHC will pay ActaMed an agreed upon price.

       3.5     ActaMed will establish a user group, to consult on priorities 
and provide direction to ActaMed on system initiatives, which will include 
representation from UHC, Providers and payors.  ActaMed will solicit user 
suggestions, input and feedback regarding the Network.  ActaMed will provide 
to UHC copies of customer satisfaction surveys and other similar information 
regarding use of the Network at sites for which UHC is paying the monthly 
site fee or any transaction fees.

       3.6     UHC will make its sales and Provider relations personnel 
available to work with ActaMed to develop new sites for use of the Network by 
Providers working with UHC, to the same extent that such personnel work with 
UHC's EDI Services to develop new sites as of the Effective Date.  Pursuant 
to paragraph 12.2, UHC shall have the option of performing installations and 
implementations of the Network software itself, rather than contracting for 
them through ActaMed.  In such circumstances where UHC has decided not to 
out-source such functions to ActaMed, UHC will continue to use health plan 
ProviderLink representatives to install and implement the Network for new and 
existing UHC-sponsored sites.  UHC will also continue to use health plan 
ProviderLink representatives to train and provide technical support to the 
extent required under Exhibit F and section 8.

       3.7     UHC shall sponsor a reasonable number of reference inquiries 
and visits (not to exceed two visits in any calendar month) by customers and 
potential customers of the Network, pursuant to ActaMed's Showcase Program, 
on mutually agreeable terms.  UHC shall retain the right to reasonably refuse 
a site visit to any competitor or potential competitor of UHC, and ActaMed 
shall inform all customers and potential customers allowed on UHC's premises 
under this paragraph 3.7 that they are required to abide by 


                                      5
<PAGE>

UHC's security procedures and policies.

       4.      ACTAMED'S OBLIGATIONS REGARDING, NETWORK PRODUCT LINE.

       4.1     ActaMed will, during the term of this Agreement, continue 
maintaining the Licensed Materials and the Network, or other ActaMed products 
which provide, at a minimum, substantially the same functionality as provided 
by the Licensed Materials and the Network, on the Effective Date.

       4.2     ActaMed will update the licensed Materials and the Network 
with changes mandated by state or federal law and other changes required in 
the reasonable opinion of the parties to meet market expectations for EDI, 
including the ANSI X12N standard.  The parties will mutually agree upon any 
additional standards which ActaMed will need to maintain.  If the changes 
mandated by this paragraph apply to substantially all of ActaMed's customers, 
then ActaMed will make such changes as part of a release of the Network or 
the Licensed Materials pursuant to paragraph 8.1 or paragraph 8.2.

       4.3     Subject to section 9, both parties will continue to work with 
practice management system vendors to develop interfaces between practice 
management programs and the Network, in order to be able to market the 
Network to Providers.  UHC will assist ActaMed in its attempts to establish 
relationships with and work with practice management system vendors.

       4.4     ActaMed will work with and cooperate with Allina and UHC to 
formulate a plan allowing Allina to use the Network to operate its LaborLink 
product, at UHC's request.

       4.5     ActaMed will be responsible for notifying all Providers, 
practice management vendors and other entities which are signatories to 
Network agreements to be assigned by UHC to EDI Services, Inc. that the 
assignee will be merged with and into ActaMed.  UHC shall have the right to 
review and approve the notice prior to ActaMed sending it to any Providers or 
other signatories.

       4.6     ActaMed shall place a copy of the source code, object code and 
technical documentation for all software used in the operation of the Network 
in escrow, including the Network Software, for the benefit of UHC, pursuant 
to the escrow agreement attached to this Agreement as Exhibit E (the "Escrow 
Agreement").  ActaMed shall cause UHC to be listed as a "Licensee" under the 
Escrow Agreement and shall cause the Licensed Materials and all operational 
computer software and documentation ActaMed uses to operate the Network to be 
listed as a "System" under the Escrow Agreement, as soon as practical after 
the Effective Date.  In the event ActaMed ceases operating the Network for 
any reason defined in such Escrow Agreement during the duration of this 
Agreement, ActaMed shall deliver to UHC, for UHC's nonexclusive use, one 
then-current copy of all operational computer software and documentation 
ActaMed uses to operate the Network.


                                      6
<PAGE>

       5.      UIHC'S OBLIGATIONS REGARDING THE NETWORK.

       5.1     UHC shall generate or receive transaction data in the standard 
format and the protocol set forth in such format which is in use as of the 
Effective Date, or as otherwise mutually agreed upon by the parties.  In the 
event that ActaMed changes such format, UHC shall provide ActaMed with 
standard output and test messages for ActaMed's use.

       5.2     UIHC shall provide, at its own expense, all necessary 
hardware, including terminal equipment, compatible with and suitable for its 
communications with the Network.  UIHC shall prepare the proper operating 
environment as described in Exhibit J attached to this Agreement.  ActaMed 
shall verify UHC's operating environment with the testing procedure 
established by ActaMed and agreed to by UHC.

       6.      ACCESS TO COSMOS AND OTHER PROPRIETARY UHC SOFTWARE.

       6.1     ActaMed will not have access to Cosmos or any other UHC 
proprietary systems, and will have no right to modify the computer code in 
Cosmos, except as mutually agreed by the parties in writing.  ActaMed will 
not receive any part of the Cosmos code, except as mutually agreed by the 
parties in writing.  The Network will deliver claims and information to 
Cosmos, and UHC is solely responsible for the operation of Cosmos.

       6.2     UHC produces new releases of Cosmos four to five times each 
year, and new releases of other UHC host computer systems (including host 
computer systems operated by third party out-sources on behalf of UHC), from 
time to time.  UHC will give ActaMed notice of such changes and information 
regarding them, and, if the changes require any modifications to the Network 
or the Licensed Materials, the parties will mutually agree on the scope of 
the project, the deliverables, deadlines, any fees ActaMed will charge UHC, a 
test plan and an acceptance test plan.

       6.3     If, at any point, UHC agrees that ActaMed needs access to any 
other proprietary UHC software or systems, the parties shall negotiate a 
limited license allowing ActaMed such access to be used only for UHC's 
benefit.

       6.4     ActaMed agrees that UHC shall be the sole and exclusive owner 
of any and all changes ActaMed makes to the code in Cosmos or any other 
computer system proprietary to UHC.  ActaMed agrees to assign and hereby 
assigns and transfers to UHC any and all rights which ActaMed may have in 
such code, including any copyright, patent, trademark, trade secret and other 
intellectual property rights.  ActaMed will cooperate with UHC and will 
execute any documentation reasonably required by UHC to assert or protect its 
property rights in such code.

       7.      DEVELOPMENT OF NEW FUNCTIONALITY.

       7.1     When ActaMed develops new functionality for the Network that
ActaMed 


                                      7
<PAGE>

offers generally to its customers, which is not included in a maintenance 
release that ActaMed offers generally to its customers pursuant to paragraph 
8.1, [*]

       7.2     When UHC specifically requests development work from ActaMed, 
for UHC's own use, the parties will negotiate a price at the time such work 
is requested.  If ActaMed will be permitted to use this custom work for other 
customers, the price UHC pays ActaMed for such work [*] that [*] and [*]

       7.3     When ActaMed performs development work on the Network at the 
request of another customer, [*] to [*] at [*] for the [*] as long as 
ActaMed has the legal right to [*] and such [*] is [*].

       7.4     If, at any time, UHC chooses to contract with ActaMed for a 
dedicated services team from ActaMed to handle development of new 
functionality and other changes to the Network, the Licensed Materials, or 
UHC's proprietary systems which are not covered under maintenance, ActaMed 
will provide the dedicated team on mutually agreeable terms and conditions.

       8.      ACTAMED'S MAINTENANCE AND SUPPORT OBLIGATIONS.

       8.1     ActaMed's maintenance releases for the Network and the 
Licensed Materials shall be denoted by a three digit number where the first 
number is the version number, the second number is the level number, and the 
third number (if it is greater than 1) is the build number.  For example, 
release 2.1.2 is a maintenance release for the version 2.1.1 software.  
ActaMed will provide new maintenance releases at no charge to all its Network 
maintenance customers, including, without limitation, UHC.

       8.2     The price UHC will pay ActaMed under paragraph 12.1 for 
ActaMed's maintenance services under this Agreement does not include 
Enhancements to the Network Software, such as new Functions, significant 
redesigns or improvements of current Functions, or significant advances in 
system performance. Enhancements are contained in Actamed's new versions 
which are denoted by a three digit number, the first digit of which is the 
version number, the second digit of which is a level number, and the third 
digit of which is 1.  For example, version 2.1.1 is followed by new version 
numbers 2.2.1, 2.3.1, 2.4.1, 3.0.1, etc.  ActaMed will make new versions of 
the Network Software available to UHC upon payment in accordance with 
paragraph 7.1.

       8.3     ActaMed will provide free Network maintenance and support
services to UHC at a minimum level which will meet or exceed the free Network
maintenance and support 

[*] CONFIDENTIAL TREATMENT REQUESTED


                                      8

<PAGE>

ActaMed provides to its other customers for the Network. ActaMed will also 
provide the support and maintenance services to UHC which are specified on 
Exhibit F attached to this Agreement.  ActaMed will notify UHC of any 
technical errors in the Network Software reported to the ActaMed help desk, 
and will use reasonable efforts to provide customers with corrections of such 
technical errors in a timely manner.  ActaMed will provide all support and 
maintenance services directly to UHC and the Providers who subscribe to the 
Network, as required.  UHC shall have no obligation to provide any support, 
training or maintenance services to Providers, other than as specified on 
Exhibit F attached to this Agreement.  In order to allow UHC to implement a 
new release of the Network or the Licensed Materials on an orderly schedule, 
ActaMed shall maintain the current release and one prior release of the 
Network and the Licensed Materials, at all times.  The maintenance services 
specified in this Agreement shall be provided at no cost to UHC beyond the 
fees set forth below in section 12.

       8.4     UHC inquiries and appeals will be handled by ActaMed within 
time frames specified on Exhibit F or as mutually agreed to, and with the 
utmost customer focus in mind.

       8.5     ActaMed will maintain the security standards for the Network 
which are set forth on Exhibit G attached to this Agreement.

       9.      EXCLUSIVITY.

       9.1     UHC agrees to use the services of the Network under this 
Agreement.  UHC agrees that it will accept and attempt to process all 
transactions listed on Exhibit H and intended for UHC which the Network 
delivers to UHC.  UHC will pay ActaMed for all such transactions pursuant to 
paragraph 12.1 of this Agreement.

       9.2     For [*] term of this Agreement (except as otherwise permitted 
under this Agreement), UHC will not promote, develop, sell or distribute any 
product [*] except as permitted under this Agreement.  UHC also agrees that 
it will not develop an interface for any third party, or provide any third 
party with access to Cosmos or any other host computer under the control of 
UHC for the purpose of developing an interface for any network that competes 
with the Network, except to the extent UHC is allowed to work with other 
vendors under this section 9 or UHC is allowed to continue existing projects 
under paragraph 9.6.

       9.3     For [*] term of this Agreement, UHC will not promote or 
contract for services providing essentially the same functionality as the 
Network from third party providers of [*] PROVIDED, HOWEVER, that UHC shall 
not be required to terminate any existing contracts with vendors of services 
similar to the Network (including, specifically, the contracts entered into 
by The MetraHealth Companies, Inc.), which are listed on Exhibit K attached 
to this Agreement.  Prior to automatic or optional renewal of any such 
contracts, however, UHC shall give ActaMed 15 business days in which to bid 
on such contracts, 

[*] CONFIDENTIAL TREATMENT REQUESTED


                                      9
<PAGE>

pursuant to paragraph 9.7 of this Agreement.  UHC shall cease actively 
promoting any products similar to the Network from vendors other than ActaMed 
in markets where ActaMed's services are available; provided, however, that 
UHC may promote products similar to the Network in markets where ActaMed has 
waived its rights under this section 9.  Nothing in this paragraph shall 
limit UHC's ability to meet its contractual obligations in such existing 
contracts, such as a contractual obligation to perform specified promotional 
activities.

       9.4     UHC agrees that, for [*] term of this Agreement, UHC will not 
and will not permit any of its subsidiaries to, directly or indirectly, (a) 
engage in or (b) have any ownership or equity interest exceeding five percent 
in any business, firm, corporation, joint venture, or other entity engaged in 
any business which competes with ActaMed's Network product (a "Competitive 
Business").  However, nothing contained herein shall prohibit UHC from 
acquiring any business, the principal line of business of which is not a 
Competitive Business and less than fifty percent of the revenues of which are 
derived from a Competitive Business.  In such case, UHC shall use its 
reasonable efforts to cause the competitive portion of such business to be 
sold or disposed of as soon as reasonably possible, and, pending such sale, 
shall not use such business in such manner as would violate the provisions of 
this section 9 or seek to expand such business in a manner that would 
substantially adversely affect ActaMed's rights hereunder.  Not later than 
one month following such acquisition, UHC shall give to ActaMed a notice of 
the acquisition of such Competitive Business and set forth the net purchase 
price (collectively, a "Sale Proposal") at which UHC would be prepared to 
sell such Competitive Business to ActaMed.  ActaMed she have the right to 
purchase such Competitive Business for such terms or on such other basis as 
UHC and ActaMed may actually agree.  In the event that, within 60 days after 
ActaMed's receipt of a Sale Proposal, UHC and ActaMed shall not have reached 
agreement that ActaMed will acquire such Competitive Business, each of UHC 
and ActaMed shall appoint an appraiser, which two appraisers shall select a 
mutually acceptable third appraiser.  As promptly as practicable such three 
appraisers shall determine the fair value of the Competitive Business and 
shall notify UHC and ActaMed of their determination.  ActaMed shall have 
sixty days after such notification in which to determine whether to acquire 
the CompetitiveBusiness at the value so determined.  If ActaMed does not 
elect to acquire the Competitive Business at the appraised value, UHC shall 
be free to sell such Competitive Business to another entity; PROVIDED, 
HOWEVER, that UHC shall not sell such Competitive Business to another entity 
within six months after the appraisers' determination on terms and conditions 
which are substantially more favorable to such other entity than the terms 
and conditions last offered to ActaMed.

       9.5     The restrictions set forth in this section 9 shall apply only 
to activities within North America.

       9.6     Nothing in this section 9 shall be construed to prohibit UHC 
from engaging in activities relating to or contracting with third parties 
relating to the following, as long as each of the following is not intended 
primarily as a connection from a Provider's desk to a 

[*] CONFIDENTIAL TREATMENT REQUESTED


                                      10
<PAGE>

network for communication of data:

       (a)     promoting, developing, using, selling, and distributing its 
               EmployerLink and LaborLink products and future versions of 
               them, and any other initiatives for employers and brokers, and 
               shall retain the right to contract with third parties to 
               perform any work relating to these products.  UHC agrees, 
               however, that EmployerLink, LaborLink and such other 
               initiatives shall not be intended for use primarily as 
               connections to Providers' desk tops;
       
       (b)     using and developing Internet connections;
       
       (c)     electronic medical records and clinical data;
       
       (d)     electronic mail (other than e-mail to and from a Provider's desk
               top);
       
       (e)     financial or banking electronic data interchange,
               telecommunications networks, or EDI used by the UHC purchasing
               department or other internal departments which are not connecting
               to a Provider's desk top;
       
       (f)     EDI between clinics and other facilities owned and/or operated by
               UHC;
       
       (g)     claims repricing; or
       
       (h)     UHC's "Total Recall" project, AdjudiPro product, or Q-Star
               product, and all future versions of them.

       9.7     In the event that this section 9 requires UHC to offer any 
business opportunities or new development work to ActaMed, ActaMed shall 
notify UHC of ActaMed's prices and terms for such business or work.  If 
ActaMed declines such business or work, or if ActaMed cannot provide the 
requested business or work to UHC [*] [*] UHC shall have the right to 
contract with a third party for such business or work or to do such business 
or work itself, and the provisions of this section 9 shall not apply to such 
business or work.  To [*] ActaMed's [*] is [*] the parties [*] among other 
things, the [*] by [*] from [*] the [*] and the [*] offered by [*] and 
whether [*].  If the parties cannot agree upon [*] the parties shall resolve 
the dispute pursuant to section 15.  In the event that any customer and/or 
supplier, including an integrated delivery system, of UHC or a UHC Affiliate 
requires, as a condition of doing business with the customer or supplier, 
that a different EDI system be-used in regard to that customer or supplier, 
UHC shall use all reasonable efforts to encourage the customer or supplier to 
utilize ActaMed's EDI system.  In the event the customers or 

[*] CONFIDENTIAL TREATMENT REQUESTED


                                      11

<PAGE>

supplier [*], UHC or the UHC Affiliate [*] with [*].

       9.8     For the initial five year term of this Agreement, ActaMed agrees
that it will not sell or distribute the Network in the Republic of South Africa,
except with UHC's prior, written approval.

       9.9     This section 9 shall not preclude UHC from providing factual
information on other EDI vendors to Providers, as long as this section 9 permits
UHC to work with such vendors and provided UHC does not promote such vendors.

       10.     PERFORMANCE STANDARDS.

       10.1    Exhibit I to this Agreement specifies the performance standards
and measurements ActaMed must achieve and the applicable time periods for
measuring compliance with the performance standards (the "Performance
Standards").  The parties shall measure, at a minimum, performance of ActaMed's
help desk and customer support and the Network.  The goal of these Performance
Standards is to ensure that the performance of the Network during the term of
this Agreement meets or exceeds the performance of the ProviderLink Network
immediately prior to the Effective Date.  In addition, ActaMed shall develop and
deliver to UHC, from time to time, ActaMed's plans to increase performance of
the Network beyond the minimum levels specified in Exhibit I.

       10.2    The Performance Standards on Exhibit I apply only to transactions
sent from or to Cosmos.  At any time that UHC uses a different host computer to
connect to the Network, the parties shall mutually agree upon performance
standards for the Network and its connection to the different host computer,
which shall become an amendment to this Agreement.

       10.3    Any time that UHC's host computers are down and/or the down time
on UHC computers will not be counted as down time for the Network.

       10.4    In the event that ActaMed fails to meet any Performance Standard
on Exhibit I in any month, ActaMed shall begin to diagnose the cause of the
failure to meet the Performance Standard promptly after being notified of or
discovering the failure to perform.  Thereafter, ActaMed shall work continuously
and diligently to correct such failure to perform until it is corrected.  The
failures to meet the Performance Standards which occur while ActaMed is working
to remedy the problem shall continue to be counted for the purposes of paragraph
10.5.

       10.5    In the event that ActaMed fails to meet any Performance Standard
on Exhibit I for [*] in any [*] period, ActaMed shall be deemed to
be in material breach of this Agreement, which allows UHC to terminate this
Agreement under paragraph 14.2 of this Agreement.  In this event, UHC shall also
have the right, at its option, to

[*] CONFIDENTIAL TREATMENT REQUESTED


                                      12
<PAGE>

terminate section 9 of this Agreement and retain the rest of the Agreement in
full force and effect, by giving the notice and opportunity to cure specified
in paragraph 14.2 of this Agreement.

       11.     REPRESENTATIONS AND WARRANTIES.

       11.1    The parties agree that ActaMed owns the Network and ActaMed
represents that it has the right to license the Licensed Materials and grant
access to the Network to UHC.  All rights in patents, copyrights, trademarks and
trade secrets encompassed in the Licensed Materials will remain in ActaMed or
its licensors, as applicable.  No title to or ownership of the Licensed
Materials is transferred to UHC.  UHC agrees that it does not obtain any rights
in the Licensed Materials except the limited right to use the Licensed Materials
as provided herein.

       11.2    ActaMed agrees to defend UHC against and, to the extent of
amounts paid to third parties in infringement damage awards and approved
settlement awards, hold it harmless from all claims, damages and liabilities
resulting from a claim that the Network or the Licensed Materials (other than
the version of the Licensed Materials which ActaMed acquired from UHC) infringes
a United States patent or United States copyright, provided that UHC gives
ActaMed prompt, written notice of any such claim, sole control of the defense
and settlement of such claim, and all reasonable assistance to defend such
claim.  UHC may appear in such action with counsel of its choice, at its own
expense.  ActaMed shall have no obligations under this paragraph if such claims,
damages and liabilities result from UHC's breach of any term of this Agreement,
UHC's unauthorized use of or modifications to the Licensed Materials or the
Network, or the combination of the Licensed Materials with other materials not
provided by ActaMed.

       11.3    If UHC's right to use the Licensed Materials or the Network is
enjoined or limited in any way, or if ActaMed believes that the Licensed
Materials or the Network is likely to become subject to such action, then
ActaMed, at its option and expense, may either:

       (a)     procure for UHC the right to continue to use the Licensed
               Materials and the Network free from such limitations;

       (b)     modify the Licensed Materials and the Network to be free from
               such limitations, but equivalent in all material functional and
               performance respects to the Licensed Materials and Network prior
               to such modification;

       (c)     replace the Licensed Materials and the Network with materials
               that are free of claims, but equivalent in all material
               functional and performance respects to the Licensed Materials and
               the Network; or

       (d)     if none of the above are reasonably possible or likely to be
               effective,


                                      13
<PAGE>

               terminate this Agreement and the licenses granted herein.

       11.4    Except as set forth in this Agreement, ACTAMED EXPRESSLY
DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, RELATING TO THE NETWORK OR
SERVICES TO BE PERFORMED BY ACTAMED HEREUNDER, INCLUDING, BUT NOT LIMITED TO,
THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE OR USE.

       12.     PRICES, PATENTS AND AUDITS.

       12.1    For [*] after the date of this Agreement, UHC will pay ActaMed 
(a) [*] per user site identification number established by ActaMed at UHC; 
(b) [*] per user site identification number established by ActaMed for which 
UHC has agreed to be responsible; (c) [*] per transaction listed on Exhibit H 
attached to this Agreement, [*] and (d) [*] transaction listed on 
Exhibit H [*]. UHC shall not pay for any transactions a Provider sends to a 
different payor. ActaMed shall not charge UHC for any unclean transactions 
which are not able to access UHC's host computer.  These payments cover all 
license fees, subscription fees, and access fees for usage of the Licensed 
Materials and the Network and all fees for the maintenance services set forth 
in section 8.

       12.2    The fees set forth in paragraph 12.1 do not cover charges for any
services UHC requests and obtains from ActaMed beyond the services specified in
paragraph 12.1, including, without limitation, file transfer of data,
installation, implementation or Enhancements of the Network, a particular sales
effort from ActaMed which ActaMed would not otherwise be providing, or a
telecommunications connection between the Network and UHC's host computers.  For
all services UHC requests from ActaMed for which this Agreement does not set
forth a price (including, without limitation, UHC's request for a particular
sales effort from ActaMed which ActaMed would not otherwise be providing), UHC
shall pay ActaMed an agreed upon price.  ActaMed shall not charge UHC anything
for installation and implementation of the Network at sites where UHC chooses to
do the installation and implementation itself.  UHC shall pay all taxes levied
in connection with this Agreement, except for any taxes based on ActaMed's net
income.

       12.3    After [*] after the date of this Agreement, the parties shall 
agree upon prices to supersede the prices in paragraph 12.1 of this 
Agreement, which new prices shall [*] [*].  To [*] is [*] the parties shall 
[*] among other things, the [*].  If the parties cannot agree upon [*] the 
parties shall resolve the dispute pursuant to section 15.

       12.4    When ActaMed offers transactions other than those set forth on
Exhibit H,

[*] CONFIDENTIAL TREATMENT REQUESTED


                                      14
<PAGE>

UHC will decide, in its sole discretion, whether it will agree to receive
and/or send such transactions.  Upon deciding to receive and/or send any such
new transaction, UHC shall pay ActaMed a mutually agreeable price for its own
such transactions and for such transactions from any other user site
identification number where UHC (in its sole discretion) decides to be
responsible for the fees.

       12.5    ActaMed will bill UHC monthly for the site and transaction fees
for UHC and any Providers where UHC has asked ActaMed to bill UHC directly, in a
mutually agreeable format.  When ActaMed bills UHC for a Provider's site and
transaction fees, ActaMed shall not bill the Provider directly for the same
charges.  Invoices will include any additional fees for other services purchased
by UHC.  UHC agrees to pay all undisputed fees and expenses invoiced by ActaMed
within thirty days after receipt of each invoice, and to pay a late payment
charge equal to the lesser of [*] per month or the maximum rate allowed by
law on all amounts outstanding after thirty days.

       12.6    ActaMed shall maintain accurate and complete books and records
regarding the transactions to and from UHC and the amounts ActaMed is charging
UHC under this Agreement, with a system of audit trails, records and controls
sufficient to satisfy the requirements imposed on ActaMed by its external
auditors and governmental regulators.  UHC shall have the right, not more often
than once in each calendar year, to have employees or mutually agreeable
external auditors audit the books and records of ActaMed relating to UHC
transactions and charges for which UHC is responsible, to determine the proper
amounts which should have been billed to UHC, which were billed to UHC, and
which UHC has paid under this Agreement, and ActaMed's procedures for handling
transactions to and from UHC.  UHC shall give ActaMed two weeks prior notice of
any such audit, and shall abide by reasonable ActaMed security and
confidentiality procedures during the audit.  UHC shall bear the cost of such
audit, provided that in the event the audit determines that ActaMed has
overcharged UHC by more than five percent of the amount properly due ActaMed in
any month beginning on or after July 1, 1996, ActaMed shall pay all costs of
such audit.

       12.7    ActaMed will, at its expense, provide UHC annually with a report
produced in accordance with standards established by the American Institute of
Certified Public Accounts' Statement on Auditing Standards Number 70: Reports on
the Processing of Transactions by Service Organizations.  ActaMed shall submit
the first such report to UHC by the end of third quarter 1997.

       13.     CONFIDENTIALITY AND SECURITY.

       13.1    "Proprietary Information" means information that is (a)
confidential to the business of a party, including, without limitation, computer
software source code, technical documentation and information regarding
proprietary computer systems, marketing and product development plans, financial
and personnel information, and other business information not generally known to
the public; and (b) is designated and identified as such

[*] CONFIDENTIAL TREATMENT REQUESTED


                                      15
<PAGE>

by a party, or which the other party should have reasonably known was
confidential.  Proprietary Information belonging to ActaMed includes, without
limitation, the Licensed Materials and the source code for its proprietary
software used in connection with the Network.  Proprietary Information
belonging to UHC includes, without limitation, information relating to Cosmos
or other UHC computer systems, and information regarding UHC's members,
Providers or health plans.  "Proprietary Information" does not include
information which a party had in its possession prior to receiving it from
the other party, or which a party properly receives from a third party, or
which is or becomes available to the public, or which a party independently
develops without reference to information received from the other party under
this Agreement.

       13.2    Proprietary Information and all physical embodiments thereof
received by either party (the "Receiving Party") from the other party (the
"Disclosing Party") during the term of this Agreement are confidential to and
are and will remain the sole and exclusive property of the Disclosing Party.  At
all times, both during the term of this Agreement and after its termination, the
Receiving Party shall hold all Proprietary Information of the Disclosing Party
in confidence, and will not use, copy or disclose such Proprietary Information
or any physical embodiment thereof (except as permitted by this Agreement), or
cause any of the Proprietary Information to lose its character as confidential
information.

       13.3    The Disclosing Party's Proprietary Information shall be
maintained under secure conditions by the Receiving Party, using reasonable
security measures which shall be not less than the same security measures used
by the Receiving Party for the protection of its own Proprietary Information of
a similar kind, and any specific security measures required by this Agreement.
The Receiving Party shall not remove, obscure or deface any proprietary legend
relating to the Disclosing Party's rights, on or from any tangible embodiment of
any Licensed Materials without the Disclosing Party's prior written consent.
Within thirty days after the termination of this Agreement, the Receiving Party
shall deliver to the Disclosing Party all Proprietary Information belonging to
the Disclosing Party, and all physical embodiments thereof, then in the custody,
control or possession of the Receiving Party.

       13.4    If the Receiving Party is ordered by a court, administrative
agency or other governmental body of competent jurisdiction to disclose
Proprietary Information, or if it is served with or otherwise becomes aware of a
motion or similar request that such an order be issued, then the Receiving Party
will not be liable to the Disclosing Party for disclosure of Proprietary
Information required by such order if the Receiving Party complies with the
following requirements:

       (a)     If an already-issued order calls for immediate disclosure, then
               the Receiving Party shall immediately move for or otherwise
               request a stay of such order to permit the Disclosing Party to
               respond as set forth in this paragraph 13.4; and

       (b)     The Receiving Party shall immediately notify the Disclosing Party
               of the


                                      16
<PAGE>

               motion or order by the most expeditious possible means; and

       (c)     The Receiving Party shall join or agree to (or at a minimum shall
               not oppose) a motion or similar request by the Disclosing Party
               for an order protecting the confidentiality of the Proprietary
               Information including joining or agreeing to (or not opposing) a
               motion for leave to intervene by the Disclosing Party.

       13.5    The Receiving Party shall immediately report to the Disclosing
Party any attempt by any person of which the Receiving Party has knowledge (a)
to use or disclose any portion of the Proprietary Information without
authorization from the Disclosing Party; or (b) to copy, reverse assemble,
reverse compile or otherwise reverse engineer any part of the Proprietary
Information (except as permitted herein).

       13.6    Each party agrees not to disclose or utilize individual health
care claim information in any way that would violate any physician-patient
confidence or any state or federal regulations.

       13.7    The obligations of this section 13 shall survive termination or
expiration of this Agreement as to any Proprietary Information which falls under
the definition of "trade secret" under the Uniform Trade Secret Act, as adopted
in the State of Georgia and as amended from time to time.  For all other
information which falls under the definition of Proprietary Information used in
this Agreement, the obligations of this section 13 shall terminate five years
after termination or expiration of this Agreement.

       14.     TERM AND TERMINATION.

       14.1    This Agreement commences as of the date set forth above and
continues for five years thereafter, unless earlier terminated as provided
herein.  The parties shall mutually agree upon any renewal of this Agreement,
but the provisions of section 9 shall not be part of any renewal.  Upon
termination or expiration of this Agreement, UHC's rights to use the Licensed
Materials and the Network shall cease.

       14.2    If one party breaches any material provision of this Agreement,
the nonbreaching party may terminate this Agreement by giving 60 days written
notice of termination to the breaching party.  If the breach is capable of being
cured and the other party acts diligently and continuously to cure such breach
within the 60 days, the termination shall not become effective.  In the event
ActaMed attempts to terminate this Agreement pursuant to this paragraph 14.2 due
to UHC's failure to pay any undisputed amounts due, the sixty day notice and
cure period set forth above shall be reduced to fifteen working days.

       14.3    If UHC or an affiliate thereof shall, at any time, cease to
manage or administer any Managed Plan, then, as of the date of such cessation,
this Agreement shall terminate as to such Managed Plan.  UHC shall inform
ActaMed that an entity has ceased or will cease to be a Managed Plan promptly
after such information is known to UHC.


                                      17
<PAGE>

       14.4    Upon termination or expiration of this Agreement, the parties
shall cooperate in the orderly and reasonable removal of UHC from the Network.
The parties shall jointly develop a transition plan, which will allow UHC to use
the Network services for a mutually agreeable time after termination or
expiration, which shall be not less than three months.  The transition plan will
provide for a reasonable level of support to transition UHC off the Network.
Each party will bear its own costs in developing the transition plan.  During
such additional time, UHC shall continue to pay ActaMed all fees due under
section 12 of this Agreement.  In the event that ActaMed has terminated this
Agreement pursuant to paragraph 14.2 due to UHC's failure to pay amounts due to
ActaMed, ActaMed will not be required to perform services for UHC or to allow
UHC access to the Network during the transition period unless UHC pays ActaMed
in advance for such services and Network access.  UHC shall not be obligated to
pay any site or transaction fees that accrue after the effective date of
termination with respect to Providers that remain connected to the Network.

       15.     DISPUTE RESOLUTION.

       15.1    In the event a dispute between ActaMed and UHC arises out of or
is related to this Agreement, either party may request in writing that the
representatives of the parties designated pursuant to paragraph 3.2 of this
Agreement meet and negotiate in good faith to attempt to resolve the dispute
without a formal proceeding.  During the course of such negotiations, all
reasonable requests made by one party to the other for information, including
copies of relevant documents, will be honored.  The specific format for such
discussions will be left to the discretion of the designated representatives.

       15.2    If the designated representatives conclude in good faith that
amicable resolution through continued negotiation in this forum does not appear
likely, then the matter will be escalated to a joint panel of ActaMed and UHC
senior executives, by formal written notification by either party to the other.
This panel will meet as required to attempt to resolve the dispute.  The number
and nature of the senior executives will depend on the issues in dispute, but
will include those senior executives with authority to resolve all matters in
dispute.  At either party's election, this panel will be facilitated by an
external facilitator designated by both parties.

       15.3    Formal proceedings for the resolution of a dispute may not be
commenced until the earlier of (a) the panel referred to in paragraph 15.2
concluding in good faith that amicable resolution through continued negotiation
of the matter does not appear likely; or (b) 30 days after the first notice of
the dispute was sent under paragraph 15.1 or paragraph 15.2.  However, nothing
in this section 15 shall preclude either party from seeking temporary or
preliminary injunctive relief where a party determines in good faith that such
relief is necessary to limit its damage or injury under this Agreement.

       15.4    In the event the dispute is not resolved as outlined in
paragraphs 15.1 and 15.2, and if either party wishes to pursue the dispute,
either party may submit it to binding


                                      18
<PAGE>

arbitration in accordance with the rules of the American Arbitration
Association.  In no event may arbitration be initiated more than one year
following the sending of written notice of the dispute.  The parties shall
request a list from the American Arbitration Association of five possible
arbitrators who shall each have had at least five years experience in some
aspect of computer networking matters or health care. Each of the parties
will select one of these arbitrators and the parties or their selected
arbitrators shall jointly select the third arbitrator from the proposed list.
Any arbitration proceeding under this Agreement shall be conducted in
Hennepin County, Minnesota, Atlanta, Georgia, or in a mutually agreeable
location.  The arbitrators shall have no authority to award any punitive or
exemplary damages, or to vary or ignore the terms of this Agreement, and
shall be bound by controlling law.

       16.     LIMITATION ON DAMAGES AND ALLOCATION OF RISK.

       16.1    Except to the extent of ActaMed's obligation to indemnify UHC 
as provided in [*] IN NO EVENT SHALL EITHER PARTY'S LIABILITY TO THE OTHER 
PARTY (INCLUDING LIABILITY TO ANY PERSON WHOSE CLAIM OR CLAIMS ARE BASED ON 
OR DERIVED FROM A RIGHT OR RIGHTS CLAIMED BY THE OTHER PARTY) WITH RESPECT TO 
ANY AND ALL CLAIMS ARISING FROM OR RELATING TO THE SUBJECT MATTER OF THIS 
AGREEMENT IN CONTRACT, TORT OR OTHERWISE, EXCEED [*].

       16.2    NEITHER PARTY SHALL BE LIABLE TO THE OTHER PARTY (NOR TO ANY
PERSON CLAIMING RIGHTS DERIVED FROM THE OTHER PARTY'S RIGHTS) FOR INCIDENTAL,
CONSEQUENTIAL, SPECIAL, PUNITIVE OR EXEMPLARY DAMAGES OF ANY KING (INCLUDING,
BUT NOT LIMITED TO, LOST PROFITS, LOSS OF BUSINESS OR OTHER ECONOMIC DAMAGE) AS
A RESULT OF BREACH OF THIS AGREEMENT.

       16.3    Notwithstanding anything to the contrary set forth in this
Agreement, ActaMed shall not be responsible for any breach of this Agreement or
loss to UHC to the extent such breach or loss is caused by materials that
ActaMed purchased from UHC or services provided by UHC.

       17.     GENERAL.

       17.1    This Agreement, including the Exhibits to it, constitutes the
entire understanding between the parties and supersedes all proposals,
communications and agreements between the parties relating to its subject
matter.  However, this Agreement does not supersede the UHC Outsourcing
Agreement between ActaMed and UHC, dated December 4, 1995, as amended from time
to time.  No amendment, change, or waiver of any provision of this Agreement
will be binding unless in writing and signed by both parties.

[*] CONFIDENTIAL TREATMENT REQUESTED


                                      19
<PAGE>

       17.2    This Agreement will be governed by and construed in accordance
with the laws of the State of Georgia applicable to contracts made and performed
therein.

       17.3    Neither party may assign this Agreement without the prior,
written consent of the other party, which shall not be unreasonably withheld.
Any attempted assignment without such consent shall be void.  Any assignment
with consent does not release the assigning party from any of its obligations
under this Agreement unless the consent so states.  Notwithstanding the above,
however, ActaMed may assign this Agreement without UHC's consent to the
purchaser of all or substantially all the business or assets of ActaMed related
to the Licensed Materials and the Network, as long as the purchaser is not a
company which competes with UHC in any of the businesses UHC owns or operates at
the time of the assignment.  If the parties cannot agree upon whether a company
competes with UHC in any of the businesses UHC owns or operates at the time of
the assignment, the parties shall resolve the dispute pursuant to section 15.

       17.4    Any notices relating to this Agreement shall be in writing and
will be sent by certified United States mail, postage prepaid, return receipt
requested, or by facsimile transmission or overnight courier service, addressed
to the party at the address set forth below, or at such different address as a
party has advised to the other party in writing and shall be deemed given and
received when actually received:

       United HealthCare Corporation                ActaMed Corporation
       9900 Bren Road East                          7000 Central Parkway
       Minneapolis, MN 55440                        Suite 600
       Attn: Chief Information Officer              Atlanta, Georgia 30328
                                                    Attn: President

       17.5    In the event one or more of the provisions of this Agreement are
found to be invalid, illegal or unenforceable by a court with jurisdiction, the
remaining provisions shall continue in full force and effect.

       17.6    The obligations of the parties under this Agreement (other than
the obligation to make payments) shall be suspended to the extent a party is
hindered or prevented from complying therewith because of labor disturbances
(including strikes or lockouts), war, acts of God, fires, storms, accidents,
governmental regulations, failure of telecommunications vendors or suppliers, or
any other cause whatsoever beyond a party's control.  For so long as such
circumstances prevail, the party whose performance is delayed or hindered shall
continue to use all commercially reasonable efforts to recommence performance
without delay and shall declare a disaster under its disaster recovery plan.

       17.7    Each party shall have the right to include the other party's name
on its customer or vendor list and to disclose the nature of the services and
products provided under this Agreement, so long as such services and products
are accurately represented; provided, however, that neither party has the right
to use the other's name, trademarks or


                                      20
<PAGE>

trade names for other advertising, sales promotion, or publicity purposes
without the other's prior written consent.

       17.8    During the term of this Agreement, neither party will solicit or
attempt to hire any individual who is then currently an employee of the other
party or who has been an employee of the other party within the six months prior
to the solicitation or hiring, without the other party's prior, written consent.
This paragraph 17.8 shall only apply to individuals who, in the case of ActaMed,
have performed services for UHC under this Agreement or worked in connection
with the Network or the Licensed Materials, or who, in the case of UHC, have
worked with ActaMed or received services from ActaMed, on behalf of UHC.

       THIS AGREEMENT CONTAINS A BINDING ARBITRATION PROVISION THAT MAY BE
ENFORCED BY THE PARTIES.

       This Agreement may be executed in one or more counterparts each of which
shall be deemed an original, but all of which together shall constitute one and
the same instrument.

       IN WITNESS WHEREOF, the parties have executed this Agreement as of the
date set forth above.

UNITED HEALTHCARE CORPORATION                ACTAMED CORPORATION

By:   /s/ Travers H. Wills                   By:  /s/  Michael K. Hoover
   -------------------------------              -------------------------------
Its:   Chief Operating Officer               Its:  President
    ------------------------------               ------------------------------
Date:                                        Date:  April 4, 1996
     -----------------------------                -----------------------------


                                      21

<PAGE>

                                 EXHIBIT LIST

Exhibit A:     Managed Plans

Exhibit B:     Licensed Materials

Exhibit C:     Development Work in Progress

Exhibit D:     Reports

Exhibit E:     Escrow Agreement

Exhibit F:     Network Maintenance and Support Services

Exhibit G:     Security

Exhibit H:     Transactions

Exhibit 1:     Performance Standards and Methods of Measurement

Exhibit J:     UHC Operating Environment

Exhibit K:     MetraHealth EDI Contracts



                                      22
<PAGE>

                                     EXHIBIT A

                                   MANAGED PLANS


Community Health Network of Louisiana, Inc. (purchase pending)
PHP, Inc. (Michigan)
     PHP of Mid Michigan
     PHP of South Michigan
     PHP of Southwest Michigan
     PHP of West Michigan
PHP of South Carolina
PHP of North Carolina, Inc. (purchase pending)

Physicians Plus Insurance Corporation
Allina



<PAGE>

                                     EXHIBIT B

                                 LICENSED MATERIALS

<TABLE>
<CAPTION>
                                                    Right to       Right to
                                                    Reproduce      Modify
                                                    ---------      ------
<S>                                                 <C>            <C>
 *User Manual, versions 2.1 and 2.2.5               No             No

 Portal Specifications                              No             No
      Communications Interface Document
      HCFA Claim Validations
      HCFA National Standard Format Claims
      ANSI X12 837 Claims Format
      Implementation Guide for Claims
      ANSI Xl 2 835 Electronic Remittance Advice
      UB92 Hospital Claim Format
      DOS Command Line Routines
      UNIX Command Line Routines

 Training Materials
      Version 2.2.5 Demo Disks and CSI Demo Disks   Yes            Yes
      PL Training Manual                            Yes            Yes

 Network: EDI TCP/IP Interface Specification        No             No

 Promotional Material
      ProviderLink Brochure                         Yes            Yes
      ProviderLink Send Back Card                   Yes            Yes
</TABLE>


*ActaMed will, upon request from UHC, identify UHC as the sponsor and promoter
of these materials.


<PAGE>

                                     EXHIBIT C

                            DEVELOPMENT WORK IN PROGRESS

Projects which are completed or will be completed by ActaMed as part of the
sale:

1.   COSMOS Distributed 'A'
2.   Ohio health plan merger
3.   Separation of the EmployerLink-ProviderLink network.  At that time, a
     comprehensive list of hardware and software products required will be
     provided to ActaMed.
4.   ORBIT
5.   MHS "Mail Rules"


<PAGE>

                    EMPLOYERLINK SPLIT FROM PROVIDERLINK NETWORK

                               PRODUCTION ENVIRONMENT

<TABLE>
<CAPTION>
<S>                                                               <C>
 ACQUIRE ALTERNATE HARDWARE:
      [*]                                                        20 hours, UHC
      [*]                                                         4 hours, UHC
      [*]                                                         2 hours, UHC
      [*]                                                        20 hours, UHC
      [*]                                                        10 hours, PL

 ACQUIRE ALTERNATE SOFTWARE:
      [*]                                                         10 hours, UHC
      [*]                                                          6 hours, UHC
      [*]                                                           2 hour, UHC

 INSTALL VENDOR HARDWARE/SOFTWARE:
      [*]                                                         40 hours, UHC
      [*]                                                         40 hours, UHC
      [*]                                                         10 hours, UHC
      [*]                                                         10 hours, PL

 SPLIT PRODUCTION EMPLOYERLINK NETWORK SOFTWARE FROM
 PROVIDERLINK:

      [*]                                                         30 UHC, 15 PL
      [*]                                                         30 UHC,  8 PL
      [*]                                                         30 UHC,  8 PL
      [*]                                                         50 UHC
      [*]                                                         40 UHC, 20 PL
      [*]                                                         15 hours, PL
</TABLE>

[*] CONFIDENTIAL TREATMENT REQUESTED


<PAGE>

                                     EXHIBIT D

                                      REPORTS

REPORTS ACTAMED WILL PROVIDE TO UHC

The following reports will be provided to UHC from ActaMed on a routine schedule
as indicated.


- -    Orbit reports

Three [*] core operating reports, for each market, will be sent to each
health plan lead ProviderLink/EDI representative and a central UHC corporate
resource.  (Available electronically or on paper as requested.)

<TABLE>

<S>                                                                        <C>
     UNI Access Status Report                                              [*]
     Monthly Detail Transaction report by source UNI                       [*]
     Monthly Detail Transaction report by Destination Market               [*]

- -    Intercompany billing detail reports for use in determining 
     allocation of transaction expensed to the proper health plan or 
     business unit.

     Summary of fees by health plan detailed by plan and DIV               [*]
     Intercompany Billing Details-site fees, mail and Era transactions     [*]
     Intercompany Billing Details-transaction charges                      [*]
</TABLE>

- -    Help Desk Reports

The following problem notification procedures will be performed by the ActaMed
Help Desk staff by call priority level.  Severity levels are defined in Exhibit
1.  Reporting on these activities will be provided to UHC upon request.

Severity 1 - High priority calls will be reported to a health plan on a [*]
basis.  A report listing each call and its status will be electronically 
mailed or faxed the following morning.  For a specific high priority call, if 
closure is not expected within [*], a call will be placed to the UHC health 
plan ProviderLink representative.  If the call is closed within [*], 
notification to UHC health plan ProviderLink representative via the next 
morning's E-mail report is acceptable.  If an UHC health plan ProviderLink 
representative cannot be accessed "live", a voice mail will be left.  [*] 
contact with the customer is required until closure.

Severity 2 - Normal priority calls will also be reported on a [*] report 
listing each call and its status.  No telephone calls will be placed to the 
plan for these calls except on and as needed basis.  Regular customer contact 
is required until closure.

[*] CONFIDENTIAL TREATMENT REQUESTED


<PAGE>

Severity 3 - Low-priority calls will also be reported in a [*] report to UHC
health plan ProviderLink representative containing all calls and status.
Customer contact is required as needed or when a course of action has been
determined.

- -    In the event that the ActaMed Help Desk computerized on-line problem
     management tool is down, call information will be recorded manually and
     entered into the system as soon as it becomes available.

- -    Required problem resolution timeframes are outlined in Exhibit D.

- -    ActaMed should prepare a quarterly Executive Summary report for UHC
     management detailing the customer issues raised during this time frame and
     the resolution of these problems.

- -    Network Availability Reports
       Modem connectivity-actual performance to standard              Monthly
       Network Transaction Success rate by plan, and in the
       aggregate                                                      Monthly
       Host and Modem availability                                    Monthly

- -    Itemization and accounting for the hours worked by the UHC Dedicated Team,
     and a project status report on each item worked.


Reports UHC will provide to ActaMed

These reports will include data from health plans centralized on COSMOS, those
plans with decentralized UHC host systems including, but not limited to,
Complete, PrimeCare, Ramsay, UHC Illinois, etc., and all ex-MetraHealth systems
including the previous Travelers and Met Life systems.

UHC will provide a resource to coordinate the assembly of this data and will
serve as the contact for all questions regarding these reports.

- -    Membership data by health plan or market provided on paper or    Monthly
     electronically where available.

[*] CONFIDENTIAL TREATMENT REQUESTED

<PAGE>

- -    Claims receipts or processed claims, for all commercial UHC      Monthly
     health plans or markets, offices or systems, including the
     total volume of claims received electronically by month and
     year-to-date, if available, actual penetration percentages
     by plans, market, offices or systems, and desired percentage
     of electronic claim receipts.

- -    Decision Support System (DSS) Data will be extracted from UHC    Monthly
     health plans and markets to support the market analysis done
     by ActaMed and for the prioritization of target providers and
     potential prospects. (A sample report is provided on 
     Attachment 1)

- -    Physician and Hospital claims volume data for each health        Quarterly
     plan/market by Provider Number and/or submitting Entity Tax
     ID including:

     *    total claims volumes received by each provider/tax ID
     *    volume received electronically (EDI) by each 
          provider/tax ID
     *    volume received on tape/other by each provider/tax ID,      Monthly
          if applicable and available

This information will be provided electronically, as available.

- -    Other data to be determined in the future to support the 
     analysis of new transactions as mutually agreed by both parties.

- -    Strategic information from UHC related to EDI growth goals       Quarterly
     and objectives by health plan/market will be provided to 
     ActaMed as needed. This will include pertinent project plans 
     and other material/documentation that will assist ActaMed to 
     enhance and increase electronic transactions for UHC.

<PAGE>




                                     EXHIBIT E





                              MASTER ESCROW AGREEMENT

                                      BETWEEN

                               PRODUCER AND FORT KNOX



     This escrow agreement is intended for use by a Producer (Developer) and
Fort Knox Escrow Services, Inc.  The Producer may escrow multiple products under
this agreement.  In addition, multiple Licensees (End Users) may be registered
as beneficiaries of this agreement.  Although each Licensee does not sign the
agreement, Fort Knox does notify them of the service.

<PAGE>

                               Master Escrow Agreement

     This Master Escrow Agreement ("Agreement") is made as of this 20th day 
of February, 1995, by and between ActaMed Corp. ("Producer") and Fort Knox 
Escrow Services, Inc. ("Fort Knox").

     PRELIMINARY STATEMENT.  Producer intends to deliver to Fort Knox a 
sealed package containing magnetic tapes, disks, disk packs, or other forms 
of media, in machine readable form, and the written documentation prepared in 
connection therewith, and any subsequent updates or changes thereto (the 
"Deposit Materials") for the computer software products (the "System(s)"), 
all as identified from time to time on Exhibit B hereto.  Producer desires 
Fort Knox to hold the Deposit Materials, and, upon certain events, deliver 
the Deposit Materials (or a copy thereof) to those persons or entities listed 
from time to time on Exhibit C hereto as a licensee of Producer ("Licensee"), 
in accordance with the terms hereof.

     Now, therefore, in consideration of the foregoing, of the mutual 
promises hereinafter set forth, and for other good and valuable 
consideration, the receipt and sufficiency of which are hereby acknowledged, 
the parties agree as follows:

     1.   DELIVERY BY PRODUCER.  Producer shall be solely responsible for 
delivering to Fort Knox the Deposit Materials as soon as practicable.  Fort 
Knox shall hold the Deposit Materials in accordance with the terms hereof.  
Except as provided in Section 10 below, Fort Knox shall have no obligation to 
verify the completeness or accuracy of the Deposit Materials.

     2.   DUPLICATION; UPDATES.

     (a)  Fort Knox may duplicate the Deposit Materials by any means in order 
to comply with the terms and provisions of this Agreement, provided that the 
Licensee to whom a copy of the Deposit Materials is to be delivered pursuant 
to the terms hereof shall bear the expense of duplication.

     (b)  Producer shall deposit with Fort Knox any modifications, updates, 
new releases or documentation related to the Deposit Materials by delivering 
to Fort Knox an updated version of the Deposit Materials ("Additional 
Deposit") as soon as practicable after the modifications, updates, new 
releases and documentation have become generally available to Producer's 
Licensees, but in any event within thirty (30) days following the first 
delivery to any Licensee.  When Producer delivers an Additional Deposit to 
Fort Knox, Fort Knox shall return to Producer the previous Deposit Materials 
it held in custody, except for the Deposit Materials that were the subject of 
the most recent previous deposit.  Except as provided in Section 10 below, 
Fort Knox shall have no obligation to verify the accuracy or completeness of 
any Additional Deposit or to verify that any Additional Deposit is in fact a 
copy of the Deposit Materials or any modification, update, or new release 
thereof.

     3.   NOTIFICATION OF DEPOSITS.  Simultaneous with the delivery to Fort 
Knox of the Deposit Materials or any Additional Deposit, as the case may be, 
Producer shall deliver to Fort Knox and to each Licensee a written statement 
specifically identifying all items deposited and stating that the Deposit 
Materials or any Additional Deposit, as the case may be, so deposited have 
been inspected by Producer and are complete and accurate.  Within five (5) 
days of receipt by Fort Knox of the Deposit Materials or any


                                       1
<PAGE>

Additional Deposit, Fort Knox will send notification of such receipt via 
certified or registered mail to the Licensee(s).

     4.   DELIVERY BY FORT KNOX

          4.1  DELIVERY BY FORT KNOX TO LICENSEES.  Fort Knox shall deliver 
the Deposit Materials, or a copy thereof, to a Licensee only in the event that:

     (a)  Producer notifies Fort Knox to effect such delivery to a Licensee 
or Licensees at a specific address or addresses, the notification being 
accompanied by a check payable to Fort Knox in the amount of one hundred 
dollars ($100.00); or

     (b)  Fort Knox receives from any Licensee:

          (i)    written notification that Producer has failed in a material
                 respect to support the applicable Systems as required by a
                 valid and existing license agreement ("License Agreement")
                 between Licensee and Producer or that Producer has generally
                 ceased its business of supporting the applicable systems
                 ("Producer Default");
          
          (ii)   evidence satisfactory to Fort Knox that Licensee has notified
                 Producer, at least ten (10) days prior to the notice to Fort
                 Knox, of such Producer Default in writing;
          
          (iii)  a written demand that the Deposit Materials be released and
                 delivered to Licensee;
          
          (iv)   a written undertaking from the Licensee that the Deposit
                 Materials being supplied to the Licensee will be used only as
                 permitted under the terms of the License Agreement;
          
          (v)    specific instructions from the Licensee for this delivery; and
          
          (vi)   a cashier's check payable to Fort Knox in the amount of five
                 hundred dollars ($500.00).

     (c)  If the provisions of paragraph 4.1(a) are satisfied, Fort Knox 
shall, within five (5) business days after receipt of the notification and 
check specified in paragraph 4.1(a), deliver the Deposit Materials in 
accordance with the applicable instructions.

     (d)  If the provisions of paragraph 4.1(b) are met, Fort Knox shall, 
within five (5) business days after receipt of all the documents specified in 
paragraph 4.1(b), send by certified mail to Producer a photostat copy of all 
such documents.  Producer shall have thirty (30) days from the date on which 
Producer receives such documents ("Objection Period") to notify Fort Knox of 
its objection ("Objection Notice") to the release of the Deposit Materials to 
a Licensee and to request that the issue of Licensee's entitlement to a copy 
of the Deposit Materials be submitted to arbitration in accordance with the 
following provisions:


                                       2
<PAGE>

          (i)    If Producer shall send an Objection Notice to Fort Knox during
                 the Objection Period, the matter shall be submitted to, and
                 settled by arbitration by, a panel of three (3) arbitrators
                 chosen by the Atlanta Regional Office of the American
                 Arbitration Association in accordance with the rules of the
                 American Arbitration Association.  The arbitrators shall apply
                 Georgia law.  At least one (1) arbitrator shall be reasonably
                 familiar with the computer software industry.  The decision of
                 the arbitrators shall be binding and conclusive on all parties
                 involved, and judgment upon their decision may be entered in a
                 court of competent jurisdiction.  All costs of the arbitration
                 incurred by Fort Knox, including reasonable attorneys' fees
                 and costs, shall be paid by the non-prevailing party.
          
          (ii)   Producer may, at any time prior to the commencement of
                 arbitration proceedings, notify Fort Knox that Producer has
                 withdrawn the Objection Notice.  Upon receipt of any such
                 notice from Producer, Fort Knox shall reasonably promptly
                 deliver the Deposit Materials to the Licensee in accordance
                 with the instructions specified in paragraph 4.1(b)(v).

     (e)  If, at the end of the Objection Period, Fort Knox has not received 
an Objection Notice from Producer, then Fort Knox shall reasonably promptly 
deliver the Deposit Materials to the Licensee in accordance with the 
instructions specified in paragraph 4.1(b)(v).

          4.2    DELIVERY BY FORT KNOX TO PRODUCER.  Fort Knox shall release 
and deliver the Deposit Materials to Producer upon termination of this 
Agreement in accordance with paragraph 7(a) hereof.

     5.   INDEMNITY.  Producer and any party claiming beneficiary status 
under this Agreement shall indemnify and hold harmless Fort Knox and each of 
its directors, officers, agents, employees and stockholders ("Fort Knox 
Indemnities") absolutely and forever, from and against any and all claims, 
actions, damages, suits, liabilities, obligations, costs, fees, charges, and 
any other expenses whatsoever, including reasonable attorneys' fees and 
costs, that may be asserted against Fort Knox Indemnitee in connection with 
this Agreement or the performance of Fort Knox or any Fort Knox Indemnitee 
hereunder, except as a result of the negligent act or omission on the part of 
Fort Knox or any Fort Knox Indemnitee.

     6.   DISPUTES AND INTERPLEADER.

     (a)  In the event of any dispute between any of Fort Knox, Producer 
and/or any Licensee relating to delivery of the Deposit Materials by Fort 
Knox or to any other matter arising out of this Agreement, Fort Knox may 
submit the matter to any court of competent jurisdiction in an interpleader 
or similar action. Any and all costs incurred by Fort Knox in connection 
therewith, including reasonable attorneys' fees and costs, shall be borne by 
the party seeking the copy of the Deposit Materials.

     (b)  Fort Knox shall perform any acts ordered by any court of competent 
jurisdiction, without any liability or obligation to any party hereunder by 
reason of such act.


                                       3
<PAGE>

     7.   TERM AND RENEWAL.

     (a)  The initial term of this Agreement shall be two (2) years, 
commencing on the date hereof (the "Initial Term").  This Agreement shall be 
automatically extended for an additional term of one year ("Additional Term") 
at the end of the Initial Term and at the end of each Additional Term 
hereunder unless, on or before ninety (90) days prior to the end of the 
Initial Term or an Additional Term, as the case may be, either party notifies 
the other party that it wishes to terminate the Agreement at the end of such 
term.

     (b)  In the event of termination of this Agreement, Producer shall pay 
all fees due Fort Knox and Fort Knox shall promptly notify all Licensees that 
this Agreement has been terminated and that Fort Knox shall promptly return 
to Producer all copies of the Deposit Materials then in its possession.

     8.   FEES.  Producer shall pay to Fort Knox fees in accordance with 
Exhibit A as compensation for Fort Knox's services under this Agreement.

     (a)  PAYMENT.  Fort Knox shall issue an invoice to Producer following 
execution of this Agreement ("Initial Invoice"), on the commencement of any 
Additional Term hereunder, and in connection with the performance of any 
additional services hereunder.  Payment is due upon receipt of invoice.  All 
fees and charges are exclusive of, and Producer is responsible for the 
payment of, all sales, use and like taxes.  Fort Knox shall have no 
obligations under this Agreement until the Initial Invoice has been paid in 
full by Producer.

     (b)  NONPAYMENT.  In the event of non-payment of any fees or charges 
invoiced by Fort Knox, Fort Knox shall give notice of non-payment of any fee 
due and payable hereunder to the Producer and, in such an event, the Producer 
shall have the right to pay the unpaid fee within thirty (30) days after 
receipt of notice from Fort Knox.  If Producer fails to pay in full all fees 
due during such thirty (30) day period, Fort Knox shall give notice of 
non-payment of any fee due and payable hereunder to the Licensee(s) and, in 
such event, the Licensee(s) shall have the right to pay the unpaid fee within 
ten (10) days of receipt of such notice from Fort Knox.  Upon payment of the 
unpaid fee by either the Producer or the Licensee(s), as the case may be, 
this Agreement shall continue in full force and effect until the end of the 
applicable term.  Failure to pay the unpaid fee under this paragraph 8(b) by 
both Producer and the Licensee(s) shall result in termination of this 
Agreement.

     9.   OWNERSHIP OF DEPOSIT MATERIALS.  Fort Knox and Producer recognize 
and acknowledge that ownership of the Deposit Materials shall remain with 
Producer at all times.

     10.  BANKRUPTCY.  Producer and Licensee acknowledge that this Agreement 
is an "agreement supplementary to" the License Agreement as provided in 
Section 365(n) of Title 11, United States Code (the "Bankruptcy Code").  
Producer acknowledges that if Producer as a debtor in possession or a trustee 
in Bankruptcy in a case under the Bankruptcy Code rejects the License 
Agreement or this Agreement, Licensee may elect to retain its rights under 
the License Agreement and this Agreement as provided in Section 365(n) of the 
Bankruptcy Code.  Upon written request of Licensee to Producer or the 
Bankruptcy Trustee, Producer or such Bankruptcy Trustee shall not interfere 
with the rights of Licensee as provided in the License Agreement and this 
Agreement, including the right to obtain the Deposit Material from Fort Knox 
in accordance with Section 3.


                                       4
<PAGE>

     11.  MISCELLANEOUS.

     (a)  REMEDIES.  Except for actual fraud, gross negligence or intentional 
misconduct, Fort Knox shall not be liable to Producer for any act, or failure 
to act, by Fort Knox in connection with this Agreement.  Fort Knox will not 
be liable for special, indirect, incidental or consequential damages 
hereunder. Licensees are intended to be third party beneficiaries as to the 
express rights and subject to the obligations set forth herein.

     (b)  NATURAL DEGENERATION; UPDATED VERSION.  In addition, the parties 
acknowledge that as a result of the passage of time alone, the Deposit 
Materials are susceptible to loss of quality ("Natural Degeneration").  It is 
further acknowledged that Fort Knox shall have no liability or responsibility 
to any person or entity for any Natural Degeneration.  For the purpose of 
reducing the risk of Natural Degeneration, Producer shall deliver to Fort 
Knox a new copy of the Deposit Materials at least once every three years.

     (c)  PERMITTED RELIANCE AND ABSTENTION.  Fort Knox may rely and shall be 
fully protected in acting or refraining from acting upon any notice or other 
document believed by Fort Knox in good faith to be genuine and to have been 
signed or presented by the proper person or entity.  Fort Knox shall have no 
duties or responsibilities except those expressly set forth herein.

     (d)  INDEPENDENT CONTRACTOR.  Fort Knox is an independent contractor, 
and is not an employee or agent of either the Producer or any Licensee.  The 
foregoing notwithstanding, nothing in this Agreement shall limit any remedies 
to which Producer may be entitled, whether at law or in equity, in connection 
with any claim relating to the misappropriation of confidential information 
or trade secrets (including the Deposit Materials) or the violation of any 
copyright or other intellectual property right of Producer.  Licensee is a 
party to this Agreement.

     (e)  AMENDMENTS.  This Agreement shall not be modified or amended except 
by another agreement in writing executed by the parties hereto, except that 
Producer may modify this Agreement at any time without the consent of Fort 
Knox to designate additional "Systems" on Exhibit B hereto and additional 
Licensees on Exhibit C hereto, as appropriate.

     (f)  ENTIRE AGREEMENT.  This Agreement, including all exhibits hereto, 
supersedes all prior discussions, understandings and agreements between the 
parties with respect to the matters contained herein, and constitutes the 
entire agreement between the parties with respect to the matters contemplated 
herein. All exhibits attached hereto are by this reference made a part of 
this Agreement and are incorporated herein.

     (g)  COUNTERPARTS; GOVERNING LAW.  This Agreement may be executed in two 
(2) counterparts, each of which when so executed shall be deemed to be an 
original and both of which when taken together shall constitute one and the 
same Agreement.  This Agreement shall be construed and enforced in accordance 
with the laws of the State of Georgia.

     (h)  CONFIDENTIALITY.  Fort Knox will hold and release the Deposit 
Materials only in accordance with the terms and conditions hereof, and will 
maintain the confidentiality of the Deposit Materials.


                                       5
<PAGE>

     (i)  NOTICES.  All notices, requests, demands or other communications 
required or permitted to be given or made under this Agreement shall be in 
writing and shall be delivered by hand or by commercial overnight delivery 
service which provides for evidence of receipt, or mailed by certified mail, 
return receipt requested, postage prepaid, and addressed as follows:

     (i)  If to Producer:
          to the address listed on the signature page hereof

     (ii) If to Fort Knox:

          Fort Knox Escrow Services, Inc.
          3539-A Church Street
          Clarkston, Georgia 30021-1717
          Attn:  Contracts Administrator
          Copy:  Michael A. Payne
                 Vice President

     If delivered personally or by commercial overnight delivery service, the 
date on which the notice, request, instruction or document is delivered shall 
be the date on which delivery is deemed to be made, and if delivered by mail, 
the date on which such notice, request, instruction or document is received 
shall be the date on which delivery is deemed to be made.  Any party may 
change its address for the purpose of this Agreement by notice in writing to 
the other parties as provided herein.

     (j)  SURVIVAL.  Paragraphs 5, 6, 8, 9 and 10 shall survive any 
termination of this Agreement.

     (k)  NO WAIVER.  No failure on the part of any party hereto to exercise, 
and no delay in exercising any right, power or single or partial exercise of 
any right, power or remedy by any party will preclude any other or further 
exercise thereof or the exercise of any other right, power or remedy.  No 
express waiver or assent by any party hereto to any breach of or default in 
any term or condition of this Agreement shall constitute a waiver of or an 
assent to any succeeding breach of or default in the same or any other term 
or condition hereof.


                                       6
<PAGE>

     IN WITNESS WHEREOF each of the parties has caused its duly authorized
officer to execute this Agreement as of the date and  year first above written.


          Fort Knox Escrow Services, Inc.
          
          By: /s/ Michael A. Payne
             ---------------------------------------------

          Title: V.P.
                ------------------------------------------
          
          Producer
          
          By:            /s/ Nancy J. Ham
                        ------------------------------------------------------

          Print Name:        Nancy J. Ham
                        ------------------------------------------------------

          Title:             CFO
                        ------------------------------------------------------

          Address:           7000 Central Parkway, Suite 620
                        ------------------------------------------------------
                             Atlanta, GA 30328
                        ------------------------------------------------------

                        ------------------------------------------------------


          Phone:             (404) 551-1600
                        ------------------------------------------------------

          Fax:               (404) 551-1601
                        ------------------------------------------------------

          Attention:         Nancy Ham
                        ------------------------------------------------------


                                       7
<PAGE>

                                     EXHIBIT A

<TABLE>
<S>                                                                            <C>
 Fees to be paid by Producer shall be as follows:

      Initialization fee (one time only)                                       $750 (payable for initial term only)

      Annual maintenance/storage fee                                           
       -  includes one Deposit Material update                                 $800/Product
       -  includes two cubic feet of storage space

      Annual Licensee registration fee                                         FULL SERVICE
                                                                               $ 150/Licensee
                                                                               (foreign licensee $250)

      Additional Updates                                                       $ 100/Product
        (above one per year)

      Additional Storage Space                                                 $ 150/Cubic foot

 Payable by Licensee or Producer:

      Due Upon Licensee's or Producer's                                        
      Request for Release of Deposit Materials                                 $ 500
</TABLE>


Fees due in full, in US dollars, upon receipt of signed contract or deposit 
material, whichever comes first.  Thereafter, fees shall be subject to their 
current pricing, provided that such prices shall not increase by more than 
10% per year.


                                       8
<PAGE>

                                     EXHIBIT B

B1.  Product Name:____________________________________________________________
     Version #:_______________________________________________________________
Prepared/Confirmed by:________________________________________________________
Title:___________________________________      Date:__________________________
Signature:____________________________________________________________________
Type of deposit:
     ____ Initial Deposit
     ____ Update Deposit to replace current deposits
     ____ Other (please describe)_____________________________________________

ITEMS DEPOSITED:
     Quantity    Media Type    Description of Material

A)   ________    ____________  _______________________________________________

B)   ________    ____________  _______________________________________________

C)   ________    ____________  _______________________________________________


B2.  Product Name:____________________________________________________________
     Version #:_______________________________________________________________
Prepared/Confirmed by:________________________________________________________
Title:___________________________________      Date:__________________________
Signature:____________________________________________________________________
     Type of deposit:
     ____ Initial Deposit
     ____ Update Deposit to replace current deposits
     ____ Other (please describe)_____________________________________________

ITEMS DEPOSITED:
     Quantity    Media Type   Description of Material

A)   ________    ____________  _______________________________________________

B)   ________    ____________  _______________________________________________

C)   ________    ____________  _______________________________________________


                                       9
<PAGE>

                                     EXHIBIT C

                                     Licensees

Please list a primary contact person, company names, and address, as well as
telephone and facsimile numbers.

COMPANY NAME & ADDRESS

A.____________________________          Contact Name:____________________

______________________________          Telephone:_______________________

______________________________          Facsimile:_______________________

______________________________          Date:____________________________

Product Name and Version #_____________________________________

B.____________________________          Contact Name:____________________

______________________________          Telephone:_______________________

______________________________          Facsimile:_______________________

______________________________          Date:____________________________

Product Name and Version #______________________________________

C.____________________________          Contact Name:____________________

______________________________          Telephone:_______________________

______________________________          Facsimile:_______________________

______________________________          Date:____________________________

Product Name and Version #______________________________________


                          (PLEASE COPY PAGE AS NECESSARY)


                                      10
<PAGE>

                                 FIRST AMENDMENT TO
                              MASTER ESCROW AGREEMENT

     This First Amendment to Master Escrow Agreement (the "Agreement") is made
to that certain Master Escrow Agreement dated February 1995 (the "master Escrow
Agreement"), between Fort Knox Escrow Services, Inc. ("Fort Knox"), and ActaMed
Corp. (the "Producer"), to provide certain amended or revised terms to the
Master Escrow Agreement.  The Master Escrow Agreement and this Amendment
together constitute the "Agreement" referred to in the Master Escrow Agreement.
All capitalized terms used in this Amendment and not defined herein have the
meaning provided for in the Master Escrow Agreement.  In the event of any
conflict between the terms of this Amendment and the terms of the Master Escrow
Agreement, the terms of this Amendment shall govern and control.

     In consideration of the sum of Ten Dollars ($10.00) in hand resolved, and
other good and valuable considerations, the receipt and adequacy of which is
hereby acknowledged, the parties hereby do agree as follows:

     Section 4.1(b)(i) of the Master Escrow Agreement is deleted in its entirety
and the following is substituted thereafter:

     (I)  written notification that Producer has failed in material respects to
          support the applicable Systems as required by a valid and existing
          License Agreement ("License Agreement") between Licensee and Producer,
          or that the terms of any other agreement to which Producer and
          Licensee are a party provides that Licensee is entitled to receive the
          Deposit Materials, or that Producer has ceased the business of
          supporting the applicable Systems ("Producer Default");

     IN WITNESS WHEREOF, each of the parties has caused this Amendment to be
executed in duplicate originals by its duly authorized representative.

Fort Knox Escrow Services, Inc.         ActaMed Corporation

By: /s/ Jane L. Elliott            By: /s/ Nancy J. Ham
   --------------------------         -------------------------------

Name: Jane L. Elliott              Name: Nancy J. Ham
     ------------------------           -----------------------------

Title: Senior Account Manager      Title: CFO
      -----------------------            ----------------------------

Date: 9/27/95                      Date: 9/27/95
     ------------------------           -----------------------------


<PAGE>

                                     EXHIBIT F

                          MAINTENANCE AND SUPPORT SERVICES

ActaMed will provide United HealthCare Corporation with the following hardware,
network and application (product) maintenance services which will be performed
by ActaMed staff not dedicated to UHC enhancements.  The cost of these
maintenance services are provided as a part of the transaction and site fees,
and include:


- -    Correction of identified system bugs in the network hardware or
     application;

- -    Changes and modifications to the ActaMed hardware, application and network
     required to manage scalability and capacity issues associated with
     increased transaction volumes;

- -    Changes required to maintain service level commitments as identified in
     Exhibit I;

- -    Help Desk services as defined in Exhibit I, including appropriate staffing,
     call response time, escalation procedures, reporting, availability,
     severity levels, problem log tracking and problem resolution, etc;

- -    Maintaining the ORBIT system and accurately performing the provider
     registration process on ORBIT to include the assignment of Site and Tax
     ID's;

- -    User Security set up and processing;

- -    Marketing Group Product Support for maintenance of a COMPUTERIZED DEFECT
     CONTROL SYSTEM problem log to include ongoing discussions between the Help
     Desk personnel and the ActaMed development staff to communicate customer
     needs and reactions to daily activity;

- -    Plan Rep Training for all current and future owned or managed plans as well
     as UHC corporate staff;

- -    Plan Rep and Corporate training will be conducted at ActaMed locations
     unless alternate locations are mutually agreed upon by both parties.

- -    Maintenance, monitoring and reporting of network and communication systems
     regarding stability and performance as specified in Exhibit D;


                                                                          F 1
<PAGE>

- -    Multi-Payor and Vendor technical and administrative support to insure
     collection and transmission of maximum volumes of electronic claims to UHC;
     Infrastructure will be upgraded by ActaMed as needed to accommodate
     provider transactions to UHC;

- -    Maintenance of appropriate connectivity to UHC host systems to maintain
     security provisions and data integrity of UHC transactions;

- -    Administer and maintain license agreement procedures with providers
     assuring appropriate signatures and approvals from UHC providers;

- -    Provide routine, updated application and network documentation for UHC
     sites and corporate;

- -    Maintain the network and application to assure data integrity of
     transactions;

- -    Maintenance releases shall be defined to include any emergency releases
     issued by ActaMed;

- -    Technology upgrades to the ActaMed hardware, network, and/or application
     (to include such things as fault tolerance products and services) will be
     included as part of ongoing maintenance;

- -    Provide ongoing support of and communication with the health plan
     representatives on electronic commerce issues, targets and strategies;

- -    Provide monthly billing detail by health plan, and in the aggregate, for
     all transaction activity.

- -    The following list of projects are "maintenance" and are part of the
     general support activities provided by ActaMed:

     1.   TCP/IP socket interface to ESN
     2.   Claim Batch Processing (CPB) - Report Generation Redesign
     3.   TALX Voice Response system support
     4.   Identification of health plans by payer ID
     5.   Menu navigation and file transfer
     6.   Accept physician claims using HCFA NSF 2.0 format



                                                                          F 2
<PAGE>

                                     EXHIBIT G

                           ACTAMED PROVIDERLINK SECURITY

FUNCTION OBJECTIVE
To provide adequate data security given the confidential nature of the data and
the types of transactions performed on the ActaMed ProviderLink network.

Security related to ActaMeds ProviderLink is made up of multiple components: 
[*].  This document will concentrate on workstation and network security.

FUNCTION FEATURES

DATA OWNERSHIP
The ActaMed ProviderLink network is a system that enables communication between
a health care provider's place of business and payer host systems.  While the
ActaMed ProviderLink network enables the flow of data between these entities, it
"owns" none of the data.

[*]
ActaMed ProviderLink [*].  [*] by the ActaMed ProviderLink network [*].  A [*]
when installing the ActaMed ProviderLink application software.  In [*] 
ProviderLink, this consisted of [*].  With [*] the ActaMed ProviderLink 
application, [*].  The [*] then [*] ActaMed ProviderLink application [*].

A [*] is used [*] to [*].  When the ActaMed ProviderLink application software 
[*].  It is the responsibility of [*] and the [*].  This allows [*] who [*] 
of ActaMeds ProviderLink.  The [*] is [*] with all [*] the ActaMed's 
ProviderLink network, but only [*] is [*].

[*]
The ActaMed ProviderLink [*] to manage security. ActaMed [*] will [*].  
When [*] the [*] can perform and [*] that

[*] CONFIDENTIAL TREATMENT REQUESTED


                                                                          G 1
<PAGE>

the [*] are granted.  The [*] also [*] with some of the [*] ActaMed's 
ProviderLink.

The ActaMed ProviderLink [*] makes a [*] with [*] the ActaMed ProviderLink 
network.  The [*] will return [*] requested transaction [*].

In addition, the [*] that make up the ActaMed ProviderLink [*] use a [*] to 
control access. Each [*] call will [*] as part of [*].  In this manner, we [*]
to a [*] in effect, if you know the [*] of the ActaMed ProviderLink [*] 
you still cannot [*].

[*]
In general, [*] is [*] to the [*].  As necessary, the ActaMed ProviderLink [*]
will provide [*] to satisfy the [*].

In the case of [*] ActaMed ProviderLink [*].  Also associated with each [*] 
are [*].  When transactions are performed to [*] the [*] then the [*].  For 
[*] transactions (referrals, claim status, etc.), the [*].

[*] CONFIDENTIAL TREATMENT REQUESTED

                                                                          G 2
<PAGE>

                                 ACTALINK SECURITY

FUNCTION OBJECTIVE
To provide adequate data security given the confidential nature of the data and
the types of transactions performed on the ActaLink network.

FUNCTION FEATURES

[*]
ActaLink is a distributed database system which operates as if it were
centralized.  It implements an [*] in a [*].  It supports operations that 
make it [*].  The user need not be concerned with [*].

[*] a given user is provided with a [*] the information in the system is [*]. 
[*] all of the details for [*].  The [*] is a set of [*].

The [*] of the detailed information [*].  The [*] of the database system 
makes [*] and intuitive, a [*].

[*]
[*] have [*].  The [*] for [*] at a [*].  Once a [*] the network [*] who 
must [*] with a [*] for that purpose.  From that time onward, until the end 
of the [*] the [*] must be used by the individual [*].

All [*] and [*] is managed [*].

[*]
All ActaLink [*] wherever [*] become the [*].  This [*] which network 
users are [*] ActaLink [*].  ActaMed provides [*] and [*] that are used only 
for the [*].  The [*] uses this [*] to access ActaLink through [*].

[*] CONFIDENTIAL TREATMENT REQUESTED

                                                                          G 3
<PAGE>

The [*] does not have ActaLink [*] so the local [*] must use a different 
account for personal ActaLink network access.  This reduces the probability 
that [*] could walk up to [*] and grant [*] without [*].

A given ActaLink [*] may be [*] a variety of [*] but only if [*] have [*]. 
Accordingly, a physician can [*] at [*] as [*] assuming that [*].  This [*] 
can be granted with [*].

[*]
When a [*] the [*] is [*] and the [*] is returned to [*].  The [*] 
determines which [*] to be [*] to the user [*] and uses [*] to prevent [*] 
from [*].  The [*] only presents the user with [*].

[*]
The ActaLink [*] is composed of [*] may [*] information in ActaLink [*].

All access to [*] in the ActaLink system [*] are [*].  The only method of [*] 
is through the ActaLink [*].  A [*] to the [*] governed by [*].

[*]
The [*] of using particular [*] to each [*].  This permits the [*] to 
allow [*] and [*] allowing some [*].  [*] correspond to [*] each of which 
[*].  As stated in the [*] this [*] is accomplished by [*] to the user.

[*] CONFIDENTIAL TREATMENT REQUESTED

                                                                          G 4
<PAGE>

                                     EXHIBIT H

                              TRANSACTION DEFINITIONS


[*] and [*] allow a user to [*] and [*] to the [*].

[*] which allows a user to [*].

[*] which allows a user to [*] about the [*] and their [*].  A user can also 
[*] if available.

[*] which allows a user to [*] for [*].

[*] which allows a user to [*].

[*] which allows a user to [*].

[*] allow [*].

[*] which allows a user to [*].

[*] CONFIDENTIAL TREATMENT REQUESTED

                                                                          H
<PAGE>

                                     EXHIBIT I

                               PERFORMANCE STANDARDS
                                        AND
                               METHODS OF MEASUREMENT


NETWORK AVAILABILITY

The network will be available 24 hours a day, 7 days a week with the exception
of scheduled downtime.

- -    During this time, ActaMed will achieve the following performance standards:

     *    [*] of the time or better, hardware and modems will be operational and
          available for receiving/accepting calls.  Hardware specifically
          includes the ActaMed UNIX machines and the modems attached to the
          hardware.  Measurement will be weekly with reporting monthly.

     *    [*] or better successful modem connectivity, until 30 days after the
          network is moved and is under the complete control of ActaMed, at
          which time [*] or better successful modem connection performance will
          be required.  Of the calls attempted, ActaMed's bank of modems will
          negotiate a successful connection and offer service [*] of the time.
          This measurement will be based on statistics generated by the HDMS
          modem rack network controller and will be measured weekly with
          reporting monthly.

     *    [*] or better of transactions will be successful.  Of the transactions
          submitted to ActaMed, [*] of these will be successfully serviced.
          Measurement will be weekly with reporting monthly.

The definition for transaction success will be those transactions that do not
result in a system generated, non-user created error.  They may be categorized
into the following:

- -    transactions that return valid data

- -    transactions that return a meaningful message, but not an error (i.e. "Name
     not found" when performing an eligibility inquiry by name.)

- -    transactions returning an error based on the information received (i.e.
     "Unknown Request Format" which indicates an incorrectly formatted
     transaction.)

[*] CONFIDENTIAL TREATMENT REQUESTED

                                                                          I 1
<PAGE>

Transaction failures are defined as those transactions that fail due to a system
component failure (i.e. "Internal DCE Error" which identifies that a service
necessary to complete the transaction was not available).  Transaction failures
will be recorded and measured according to the standards described above.


AVAILABILITY MEASUREMENT

Availability is measured as the number of ACTUAL hours available as a percentage
of total AVAILABLE hours.  Planned systems downtime is NOT included in the total
availability time.  The following definitions are used for calculating the
availability measurement:

- -    DEFINED HOURS are the total days in the month multiplied by 24 hours.

- -    PLANNED HOURS are the planned and published hours that any system is down
     for maintenance or other planned outages.

- -    AVAILABLE HOURS are the Defined Hours minus the Planned Hours.

- -    UNPLANNED HOURS are the unplanned hours of downtime experienced during the
     month.

- -    ACTUAL HOURS are the Available Hours minus the Unplanned Hours.

- -    AVAILABILITY PERCENTAGE is determined by dividing the Actual Hours by
     Available Hours and multiplying the result by 100.

- -    CONNECTIVITY PERCENTAGE is determined by dividing the Total Successful
     Calls to the system by the Total Attempted Calls and multiplying the result
     by 100.

UHC will consider these performance standards achieved if the network
availability described above is achieved [*] of the time, or better.  UHC will
consider less than [*] performance achievement within [*] of any
consecutive [*] period to be a material breach of this Service Level
Agreement.

Reporting as identified in Exhibit D will be the source documents from which
these standards will be measured.  Compliance to these standards will be
determined by UHC upon reviewing the reports provided to the UHC/ActaMed
liaison.

[*] CONFIDENTIAL TREATMENT REQUESTED

                                                                          I 2
<PAGE>

In the event that ActaMed cannot perform according to the standards because of
emergent situations.  UHC will be notified following the emergency procedures
outlined in this document.

Reports on performance are due to UHC by no later than the 10th working day
following the end of the month.


LABORLINK SYSTEM

ActaMed will continue to support the batch processing of Allinas LaborLink
system, at the level of performance required for the ActaMed ProviderLink
network.  ActaMed will deliver files to the Third Party Administrator's (TPA)
mailboxes as soon as UHC uploads the files to the network, usually available by
8:00 a.m. every Monday, which allows reports to be released to TPA's by noon on
Monday, fifty-two weeks a year.


DATA INTEGRITY

ActaMed will uphold the highest standard of integrity with regard to the
transmission and processing of transactions, reporting performance and service.
Information received from ActaMed will be correct, and without errors, [*] of
the time, measured monthly, unless otherwise stated in the SLA.

All updates from COSMOS or other UHC host systems will be promptly and correctly
applied [*] of the time.


ACTAMED PROVIDERLINK HELP DESK

Users, UHC health plans and business units agree to call the ActaMed
ProviderLink Help Desk at 612-945-8500 or 1-800-446-8279 for all problem
resolution when concerns cannot be resolved by the Health Plan, or a Health Plan
representative is not available.  The ActaMed ProviderLink Help Desk will be
open from 7:00 a.m. - 5:00 p.m. CST, Monday through Friday.  Voice mail is
available for after hour calls.  Messages left on voice mail after business
hours will be retrieved the following business day.

[*] CONFIDENTIAL TREATMENT REQUESTED

                                                                          I 3
<PAGE>

CALL DOCUMENTATION

Utilizing the ActaMed ProviderLink Help Desk computerized problem management
tool, the following information will be recorded on each call to the help desk:

Site ID (PC ID)     Site Name                Caller Name         Phone Number
Health Plan         Priority Level           Date of Call        Time of Call
Problem Code        Call Recipient           Problem Definition
Call Status         Resolution Information

The ActaMed ProviderLink Help Desk will attempt to accommodate any requests for
additional information as long as the collection of the information does not add
significant time and effort in logging the call.  The ActaMed ProviderLink Help
Desk statistics will be reported to UHC on a routine basis but will not be
integrated into any individual health plan's call tracking statistics.


DEFINITION OF THE PRIORITY LEVEL CLASSIFICATIONS

All calls will be assigned to one of three priority levels.  The following
definitions will be used by the ActaMed ProviderLink Help Desk Representatives
to assign priority to calls:

SEVERITY 1 - A critical system or component is down or experiencing degraded
service causing UHC's or a customer's business functions to be halted

SEVERITY 2 - A single user is down, a component is experiencing degraded
service, or scheduled deliverables are unavailable.  This does not have a
critical impact on the business, but may restrict function to some users and may
impact normal business operations.

SEVERITY 3 - A user's system is still operating but is experiencing difficulties
or a specially requested deliverable is unavailable.

The definition of each priority level and the classification of call types into
priority levels will be determined through negotiation between ActaMed and UHC. 
The definitions may be reassessed and are subject to change.  The ActaMed
ProviderLink Help Desk's method of classifying calls into priority levels will
be reviewed periodically with UHC.  UHC will be responsible for defining
additional situations and communicating to ActaMed any requests on how to
classify particular call situations.


                                                                             14
<PAGE>

In the event that the ActaMed ProviderLink Help Desk computerized on-line
problem management tool is down, call information will be recorded manually and
entered into the system when it becomes available.


MEASUREMENT

Objectives have been set for both the maximum time required for communicating
the current status and action plan to the user and to UHC for each priority
level and for the percentage of call volumes that will meet these objectives.

Measurement will begin when the problem is received by the ActaMed ProviderLink
Help Desk and recorded into the computerized on-line problem management tool. 
Measurement will end when the call is closed, (i.e. the current status and
action plan is communicated to the user and the appropriate UHC health plan has
acknowledged the problem) by the ActaMed ProviderLink Help Desk representative. 
It is the responsibility of the UHC health plan personnel to notify ActaMed
ProviderLink Help Desk when an open call has been resolved by a health plan
resource, but not communicated to ActaMed by the user.

The percent of calls closed within the time frame objectives will be measured by
calculating, by priority level, the volume of calls closed within the time frame
objectives as a percentage of total calls opened.


SALES, INSTALLATION AND TRAINING

When selling ProviderLink, UHC will ensure that the users conform to the
technical standards that have been established in the current version of
Schedule B of the ProviderLink License Agreement.  UHC will continue to follow
ProviderLink approved installation procedures and will provide an adequate level
of user understanding of ProviderLink through appropriate training.

The ProviderLink health plan representatives will be trained by ActaMed as
described in Exhibit F. UHC recognizes that the quality of ActaMed's
ProviderLink Help Desk support is partially dependent on UHC's sales and
installation to sites with approved technical requirements and thorough training
of users.


CAPACITY PLANNING

UHC is responsible for providing the ActaMed's ProviderLink Help Desk with as
much information as possible to assist ActaMed in planning for the appropriate
levels of staffing to meet the service level objectives.  Forecasts of site
sales,


                                                                             15
<PAGE>

installation scheduling and specific events that will impact ActaMed's
ProviderLink volume of calls will be communicated to the best of UHC's ability. 
Major support requirements will be communicated with a 90 day lead time,
whenever possible.


TECHNICAL MAINTENANCE/ENHANCEMENT SCHEDULING OBJECTIVES

PDR (PROVIDERLINK DEVELOPMENT REQUEST) PROCESS

ActaMed will have an established process for documenting all ProviderLink user
requests for correction of problems or the development of new functionality. 
All requests are recorded into a computerized defect control system software
product including a detailed description of the requirements.  All regular open
requests are reviewed by the ActaMed ProviderLink development team on a routine
basis, however, UHC will be responsible for establishing the development
priorities.  ActaMed assumes the responsibility to make the development and
maintenance modifications based on UHC priorities.

DURING THE TRANSITION, ACTAMED PROVIDERLINK PRODUCT MARKETING WILL AID AND
CONTRIBUTE TO THE PRIORITIZATION OF UHC REQUESTS IF NEEDED.  FOLLOWING THE
TRANSITION PERIOD, ACTAMED WILL CONSIDER THIS ASSISTANCE A LONG TERM BILLABLE
SERVICE.

NETWORK MAINTENANCE RELEASES

Regular ProviderLink network maintenance enhancements and fixes will be
completed and certified on a regular basis.  They will be released into
production on Thursday evenings, AS AVAILABLE.  Major software and hardware
releases will be scheduled to go into production on weekends.  ActaMed will
communicate these changes to UHC on a regular, weekly basis.


EMERGENCY MAINTENANCE RELEASES

Emergency maintenance is defined as the correction of a technical bug or
omission in the existing functionality of ActaMed's ProviderLink presentation
software or network.  The technical problem renders the ProviderLink feature or
user inoperable.

ActaMed will be responsible for ongoing monitoring and quality control of the
network and application.  UHC will expect ActaMed to have a well defined problem
identification procedure to document and fix inoperable functionality before
recognized by UHC or its users.  However, when this has not been


                                                                             16

<PAGE>

accomplished, UHC will in cooperation with an ActaMed staff resource, 
complete a PDR with as much information as is available, designate it as 
emergency, and submit it to the ActaMed ProviderLink Product Marketing staff. 
The UHC/ActaMed liaison is responsible for supporting ActaMed with the 
initial research and documentation of the problem via the PDR.

The service level performance objective for emergency correction will be within
ten business days.  Tracking of the fix will begin at the time of ActaMed's
receipt of the PDR.  Emergency changes will be released on any given day.  These
releases are not subject to the Thursday release schedule.

The correction of the emergency technical problem will be in the control of the
ActaMed development team.  ActaMed is not responsible for correcting problems
located outside of the ActaMed ProviderLink presentation software or network,
i.e. a specific user's configuration, hardware problems, or technical problems
located within another vendor's software.


APPLICATION MAINTENANCE RELEASES

Application Maintenance releases will include maintenance and fixes of
presentation software bugs identified and documented in the PDR process.  A
software bug is defined as existing functionality that fails to perform as
designed.

Where applicable, it will be the responsibility of UHC to assist
ActaMed/ProviderLink development in thoroughly researching user needs and
determining the implication of product changes on all stakeholders within United
HealthCare and ProviderLink end users.

The registration, installation and training of ProviderLink users on the
features of any maintenance release is the primary responsibility of UHC.


ENHANCEMENT RELEASES

All enhancements to the ActaMed ProviderLink software or network will be
provided to UHC health plans or affiliates as outlined in the Service Level
Agreement.  Enhancements are defined as the addition of functionality that does
not currently exist in the ProviderLink system, or is currently not supported. 
In addition, these releases may include maintenance and fixes of presentation or
other software bugs not included in the routine application maintenance
releases.

An enhancement release may also include modifications to any or all of the
current ProviderLink features of Claim Submissions, Eligibility, Referrals,
Referral Status, Claims Status, ProviderLink E-mail/Fax, and Provider Directory.


                                                                             17
<PAGE>

Enhancements specific to UHC, and those created exclusively for UHC by the
ActaMed/UHC dedicated team, will be released according to the agreed upon
schedule.  Information specific to the dedicated team and enhancements paid for
by UHC, will be outlined in the Dedicated Team Agreement.

It is the responsibility of UHC to assist ActaMed/ProviderLink development in
thoroughly researching user needs and determining the implication of product
enhancements on all stakeholders within United HealthCare and ProviderLink end
users.

The registration, installation and training of ProviderLink users on the
features of any new release is the primary responsibility of UHC.  All requests
for the development of enhancements in functionality will be communicated to
ActaMed through the PDR process.


COMMUNICATION OF TECHNICAL REQUIREMENTS

The ActaMed ProviderLink development team will formally communicate to UHC's
health plan ProviderLink Managers, 90 days prior to release date, any
anticipated changes in standard hardware requirements, as defined in the current
version of schedule B of the ProviderLink License Agreement, that would impact
UHC's users of new ProviderLink software releases.


PLANNING FOR THE YEAR 2000

ActaMed will plan for, and successfully implement, changes to all applications
and network tools and services to accommodate the transition to the year 2000. 
ActaMed will perform this task on internal software as part of the maintenance
agreement with UHC and will be done at no extra cost.  If UHC data formats
change as a result of adding support for the year 2000, UHC will prioritize this
exclusive change for ActaMed and submit the change request for completion by the
UHC dedicated team.


                                                                             18
<PAGE>


ALLINA SERVICE LEVEL AGREEMENT (SLA)

ActaMed will perform to the level of service described in the 1996 agreement
negotiated with Allina by the UHC EDI Services Department through the duration
of the 1996 calendar year.


                                                                             19

<PAGE>

                                  EXHIBIT J

                          UHC Operating Environment

(a)  [*] will provide [*] between ActaMed and [*].

(b)  [*] will provide [*] between [*].

(c)  [*] will provide [*].  UHC will provide [*] the communications 
     between ActaMed and [*].

(d)  [*] may [*] as appropriate [*].

ATTACHED DIAGRAMS:

In the first diagram, labeled Attachment 1, the division of responsibility is 
identified by the vertical line.  This division of responsibility is depicted 
in more detail by the second diagram, labeled 'ProviderLink Architecture'.  
In the second diagram, the cloud which represents [*] at the bottom of the 
page [*] are the responsibility of [*].  The [*] to connect the [*].

[*] CONFIDENTIAL TREATMENT REQUESTED

                                                                             20

<PAGE>

                                                                EXHIBIT K

                                                              EMC CONTRACTS
<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
 VENDOR                           CONTRACT       RENEWAL        PRODUCTION   FEES PER CLAIM               CHARGE TO PROVIDER
                                  DATE           DATE           DATE
- ------------------------------------------------------------------------------------------------------------------------------------
 <S>                             <C>             <C>            <C>          <C>                          <C>

[*]

</TABLE>

[*] CONFIDENTIAL TREATMENT REQUESTED







<PAGE>
                          CONFIDENTIAL TREATMENT REQUESTED


                                 SERVICES AGREEMENT


            This SERVICES AGREEMENT (the "Services Agreement" or "Agreement")
is made and entered into as of December 31, 1997 by and between ACTAMED
CORPORATION, a Georgia Corporation ("ActaMed") and SMITHKLINE BEECHAM CLINICAL
LABORATORIES, INC., a Delaware Corporation ("SBCL").
                                          
                                     BACKGROUND

            ActaMed is in the business of providing electronic data interchange
products and services to the health care industry, including its ProviderLink
software, and desires to develop business involving automated laboratory order
entry and results reporting  services.

            SBCL provides laboratory testing services to certain Providers 
who use SBCL Software (as defined in the License Agreement) for electronic 
clinical laboratory test order entry and/or test result reporting between an 
SBCL Lab and such Provider.  In addition, SBCL uses the SBCL Software to 
allow [*] to send laboratory test orders entered electronically to an SBCL 
Lab and/or to have the test results reported electronically back to the PSC 
or the Provider ordering the test.

            The parties previously entered into the Development Agreement
pursuant to which ActaMed and SBCL are jointly developing the ActaLab Software.

            Simultaneously with the execution of this Agreement, ActaMed and
SBCL are entering into the Purchase Agreement pursuant to which ActaMed is
purchasing and SBCL is selling certain assets associated with SBCL's provision
of Lab EDI Services, as more fully set forth therein.  Also concurrently with
the execution and delivery of this Agreement, SBCL and ActaMed are entering into
the License Agreement whereby SBCL, among other things, grants ActaMed a license
to the SBCL Software.  This Agreement sets forth the parties' agreements
relating to their rights and obligations following the date hereof relating to
provision of Lab EDI Services to Automated Providers.

            Pursuant to the Purchase Agreement, the Parties contemplate that
there will be a staged transfer to ActaMed of SCAN Assets. The transfer of
Region One SCAN Assets is to occur on the Region One Transfer Date.  The
transfer of the other Regions will occur sequentially when the Transfer
Benchmarks (as defined in the Purchase Agreement) have been met. 

            NOW THEREFORE, in consideration of the premises and the mutual
promises contained herein, the parties, intending to be legally bound, agree as
follows:


[*] CONFIDENTIAL TREATMENT REQUESTED

<PAGE>

I.     DEFINITIONS.

       Capitalized terms used in this Agreement and not otherwise defined
herein are defined in EXHIBIT A attached hereto.

II.    NETWORK READINESS SERVICES.

       A.   GATEWAY REPLICATION.  SBCL shall be responsible [*] to provide 
such reasonable and appropriate software development, installation and 
support services as are necessary to establish connectivity with an ActaMed 
gateway  (the "ACTAMED GATEWAY") that works substantially as the SBCL gateway 
works as of the date hereof.  In connection with such services from SBCL: 

            1.   ActaMed shall [*] order, acquire, install and configure 
the necessary hardware and data communications lines required to install and 
operate the appropriate gateway systems, including without limitation a [*] 
modems, 800 phone service, [*] and data communications lines for connection 
to SBCL systems.  SBCL will provide specifications and guidance to assist 
ActaMed in this effort.

            2.   SBCL will install the gateway software on ActaMed's computer
and modify the gateway software as necessary to cause it to communicate with the
SBCL systems.  At SBCL's determination, this may include new enhancements or
additional software as needed to allow the ActaMed Gateway to transmit
Transmittal Information for Automated Providers using the SCAN Network.

            3.   At such time as the ActaMed Gateway has been adequately (in
SBCL's determination) tested, including for compliance with applicable SBCL
internal standards and using SBCL sample clinical laboratory test orders and/or
test result report data, in which testing ActaMed and SBCL shall cooperate, SBCL
shall so notify ActaMed.  For a period of up to thirty (30) days after the date
of such notice, ActaMed shall be entitled to perform such quality assurance
testing as it shall reasonably deem appropriate.  SBCL shall provide reasonable
assistance to ActaMed in this process.  If the system is not performing
substantially the same as SBCL's gateway and as necessary to enable ActaMed to
meet the Key Performance Standards and to provide the Lab EDI Services using the
ActaMed Gateway, ActaMed shall provide timely notice to SBCL of such deficiency
or performance problem within such thirty (30) day period.  SBCL shall supply
the appropriate personnel to investigate and correct any such reported
deficiencies or performance problems. The acceptance period shall be extended to
two (2) weeks beyond the time of such correction.  When corrected to the
reasonable satisfaction of ActaMed and SBCL, or if SBCL is notified of no
further deficiencies or performance problems within such period, the ActaMed
Gateway shall be deemed ready and accepted by ActaMed.

            4.   SBCL will provide reasonable training of ActaMed personnel and
any available documentation to allow ActaMed to operate and support its gateway
independently; 


[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -2-
<PAGE>

provided that SBCL will not provide [*] or other base-line training that may 
be required by ActaMed.  

            5.   The foregoing procedures of this Section II.A shall be
completed within one hundred twenty (120) days after the date hereof.

            6.   After acceptance of the ActaMed Gateway and until [*] SBCL 
shall, at ActaMed's written request, provide such maintenance and related 
support to the ActaMed Gateway as may be necessary to continue its effective 
operation at substantially the same performance levels as SBCL experienced on 
its gateway immediately prior to the date hereof.  SBCL shall charge ActaMed 
for such services at the then industry standard rates for similar services.  
After [*] (i) SBCL makes no representation or warranty as to the performance 
of the ActaMed Gateway software systems so established by SBCL hereunder; and 
(ii) ActaMed may request SBCL to provide such support and, if SBCL elects to 
provide such support, SBCL may charge ActaMed for such services at the then 
industry standard rates for similar services.

       B.   MIGRATION PERIOD.  After the Transfer Date of a Region,  SBCL and
ActaMed shall have the following obligations with respect to SBCL Sites
transferred to ActaMed in that Region:

            1.   ACTAMED TO MIGRATE SITES.  ActaMed will use its good faith
efforts to migrate the SBCL Sites so transferred from communicating with the
SBCL gateway to communicating with the ActaMed Gateway as soon as practicable,
and shall similarly use its best efforts, and take all steps reasonably
necessary, to assign financial responsibility or otherwise change the billing of
dedicated phone lines installed in Automated Providers' offices for Lab EDI
Services from SBCL over to ActaMed.  SBCL will support ActaMed in ActaMed's
efforts to transfer the local phone lines to ActaMed's account and, subject to
ActaMed's obligation under Section II.B.7.(g) hereof, pay any charges,
assessments, fees or other amounts incurred by SBCL for such transfer.

            2.   EDI AGREEMENT AMENDMENTS.  ActaMed shall obtain signed
amendments to any existing CIS Agreement between a Provider and SBCL or a new
CIS Agreement between the Provider and ActaMed containing the provisions set
forth in EXHIBIT II.B.2(a).  SBCL shall obtain a signed agreement from such
Provider for Lab EDI Services by ActaMed in the form of EXHIBIT II.B.2(b). 

            3.   ASSISTANCE FROM SBCL.  SBCL will make available to ActaMed 
such resources as SBCL determines is reasonable and appropriate for the 
transfer of each Region, at no cost to ActaMed.  After the earlier of (i) [*] 
after the Transfer Date for a particular Region or (ii) the full migration of 
SBCL Sites in such Region from communication with the SBCL gateway to 
communication with the ActaMed Gateway, SBCL will continue to use its good 
faith efforts to make such resources available to ActaMed and may charge 
ActaMed therefor at then industry standard rates for similar services.

            4.   SUPPORT SERVICES.  From time to time prior to the [*]


[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -3-
<PAGE>

                 a.   ActaMed may request that SBCL's [*] provide services 
to ActaMed in [*] to assist ActaMed in the delivery of items relating to 
ActaMed's delivery of Lab EDI Services to Automated Providers (provided 
ActaMed delivers the item to [*] for such delivery to the Automated 
Provider), such services to be provided consistently with the manner and 
extent to which SBCL has used such [*] during the twelve (12) month period 
prior to the Transfer Date of the Region in [*] is located.  SBCL shall 
direct its [*] to provide such services provided that SBCL shall not be 
responsible for any Losses incurred as a result of providing such services.  
Nothing in this Section III.B.4 shall require SBCL, ActaMed or [*] to provide 
any service if to do so would cause any party, including [*] to violate any 
Regulation.

                 b.   SBCL may request that ActaMed's employees provide 
services to SBCL in the course of their normal duties to assist SBCL in the 
delivery of items (E.G., [*]) to Automated Providers (provided SBCL delivers 
the item to the employee for such delivery to the Automated Provider), such 
services to be provided consistently with the manner and extent to which SBCL 
has used employees for such purposes during the twelve (12) month period 
prior to the Transfer Date of the Region in which such employee works.  
ActaMed shall direct its employees to provide such services provided that 
ActaMed shall not be responsible for any Losses incurred as a result of 
providing such services.  Nothing in this Section III.B.4 shall require 
ActaMed, SBCL or such employee to provide any service if to do so would cause 
any party, including the respective employee, to violate any Regulation.

            5.   USE OF SBCL FACILITIES BY TRANSFERRED EMPLOYEES.  ActaMed 
will employ the Transferred Employees in accordance with the provisions of 
Article VI of the Asset Purchase Agreement.  From the Transfer Date of a 
Region until [*] after the Transfer Date of that Region, such Transferred 
Employees may continue to use such office space, office equipment, office 
telephones, office supplies, and have access to such office services as such 
Transferred Employees had immediately prior to the applicable Transfer Date 
(collectively, "OFFICE SPACE"), [*] whether or not such Transferred 
Employees are responsible for ActaMed Sites.  No employees of ActaMed other 
than the Transferred Employees currently assigned to such Office Space shall 
be allowed to use such Office Space, and ActaMed may not place signage inside 
or outside of such Office Space or use such Office Space for any operations 
other than the transition contemplated by this Section II and the provision 
by ActaMed of Lab EDI Services. 

            6.   SCAN NETWORK MAINTENANCE.  SBCL shall continue to have and
support Lab EDI Services between each SBCL Site and SBCL's gateway until
migration of such SBCL Site to the ActaMed Gateway is completed.  SBCL will
continue to operate and maintain its gateway systems for such purposes.  


[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -4-
<PAGE>

            7.   ACTAMED PAYMENTS TO SBCL. In consideration of services
provided under this Agreement, ActaMed will pay SBCL the following amounts (in
addition to any other amounts which may be charged to ActaMed by SBCL as
expressly set forth in this Agreement):

                 a.   A fee in the amount of [*] per month for each month 
after the Region One Transfer Date (prorated for any portion thereof); 
provided that no payment shall be made under this clause a. either (i) if a 
payment is made under clause b. below, after the third month after the Region 
One Transfer Date, or (ii) if a payment is not made under clause b. below, 
after the Region Two Transfer Date.

                 b.   A fee in the amount of [*] for each month prior to the 
Region Two Transfer Date (prorated for portion thereof) commencing with the 
fourth month after the Region One Transfer Date, provided, however, that 
payment under this Section II.B.7.b shall not be made unless the delay in the 
Region Two Transfer Date beyond the date three (3) months after the Region 
One Transfer Date is due to ActaMed's failure to meet the Transfer Benchmarks 
(with any dispute with respect thereto to be resolved in accordance with 
Section XV hereof).

                 c.   A fee in the amount of [*] per month for each month 
after the Region Two Transfer Date (prorated for any portion thereof), 
provided that no payment shall be made under this clause c. after the Region 
Three Transfer Date;

                 d.   A fee in the amount of [*] per month after the Region 
Three Transfer Date (prorated for any portion thereof), provided that no 
payment shall be made under this clause d. after the Region Four Transfer 
Date;

                 e.   Until the date which is twelve (12) months after the 
Transfer Date of a Region, reimbursement for any local and long distance 
telecommunication services (including 800 and 888 service other than 800 and 
888 numbers used to [*]) billed to SBCL in respect of SBCL Sites in that 
Region;

                 f.   From and after the date which is twelve (12) months 
from the Transfer Date of a Region, an amount equal to [*] of the amount of 
any local and long distance telecommunication services (including 800 and 888 
service other than 800 and 888 numbers used to [*]) billed to SBCL in respect 
of SBCL Sites in that Region; and

                 g.   Reimbursement for [*] of any charges, assessments, fees 
or other amounts incurred by SBCL for the transfer of any dedicated phone 
lines installed in Automated Providers' offices for Lab EDI Services into the 
ActaMed name, including without limitation any transfer fees or new 
installation fees.

       C.   PAYMENT TERMS FOR ACTAMED PAYMENTS TO SBCL.  SBCL shall invoice 
ActaMed monthly for the services rendered by it and chargeable to, or to be 
reimbursed by, ActaMed pursuant to this Section II.  All amounts shown due on 
such invoice shall be paid within [*] after the date of the invoice.  Late 
payments shall be subject to a late fee equal to [*] per 


[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -5-
<PAGE>

month on the overdue amount.  In the event ActaMed disputes any amount shown 
due on such invoice, ActaMed shall pay timely any undisputed amounts and send 
a Dispute Notice to SBCL with respect to any disputed amounts.  For a period 
of thirty (30) days after the date of the Dispute Notice, ActaMed shall have 
Audit Rights with respect to the portions of SBCL's books and records that 
relate to the subject of the dispute.  In the event the parties are unable to 
resolve the disputed matter, the matter shall be resolved in accordance with 
Section XV hereof and application of any late fee to such disputed amount 
shall be tolled until conclusion of such proceedings and then applied only to 
the amount so determined to be due.

III.   SERVICES AFTER TRANSFER.

       A.   PLANNING AND OVERSIGHT COMMITTEE. On or promptly after the Region
One Transfer Date, SBCL and ActaMed will establish an Oversight Committee having
the obligations set forth in this Section III  (the "OVERSIGHT COMMITTEE"). The
parties may thereafter, in their respective sole discretion, change the
complement of the Oversight Committee, including without limitation to decrease
or increase the number of members on the Oversight Committee, so long as the
Oversight Committee shall continuously have equal numbers of persons
representing ActaMed and SBCL, provided that SBCL may appoint a majority of the
Oversight Committee members if ActaMed consents thereto. The Oversight Committee
shall continue in effect through the term of the Agreement (including any
applicable renewal period).  Each member of the Oversight Committee will have
responsibility to, among other things,

            1.   review the performance of ActaMed hereunder, as measured by
the Performance Standards, 

            2.   review the compliance of ActaMed with Regulations and report
to ActaMed and SBCL with respect to compliance matters,

            3.   discuss trends in the health care information services
industry and service type and quality offered by competitors of ActaMed,

            4.   exchange information regarding strategic needs and directions
of the respective ActaMed and SBCL businesses that are relevant to the
relationships contemplated by this Agreement,

            5.   exchange information about technological developments for
electronic connectivity in the health care information services industry,

            6.   provide feedback to ActaMed and SBCL regarding the
implementation and effect of ActaMed's preferred provider status pursuant to
Section VII of this Agreement,

            7.   notify SBCL, ActaMed and other members of the Oversight
Committee at any time such member has any knowledge that ActaMed has not
performed in accordance with the Performance Standards, and make recommendations
to ActaMed and SBCL as to remedying 

                                       -6-
<PAGE>

performance that does not comply with this Agreement, including without 
limitation the Performance Standards, and

            8.   examine and, collectively with the other members, report to
ActaMed and SBCL from time to time on ways in which Agreed Services can be
improved.   

       B.   AGREED SERVICES. ActaMed will provide the following services to
SBCL and Automated Providers at ActaMed Sites in accordance with the Performance
Standards and will take all reasonable and appropriate action to preserve the
Network and the goodwill of the Automated Providers utilizing such services:

            1.   NETWORK SUPPORT.  ActaMed shall maintain and support the
Network for Lab EDI Services between Automated Providers and an SBCL Lab and
shall ensure that the Network meets or exceeds all Network Standards.

            2.   INSTALLATION AND TRAINING. ActaMed will provide 
installation, set up and training services at all ActaMed Sites as reasonably 
necessary to enable such ActaMed Sites to utilize the Network accurately and 
efficiently.  In this connection, ActaMed will (i) install software, and if 
necessary and appropriate and consistent with contractual relationships 
between SBCL and ActaMed, hardware, (ii) confirm set up thereof, (iii) 
confirm the ability after set up to successfully transmit and receive modem 
communications with the applicable SBCL Lab and that requisitions and results 
functionality is accurate, and (iv) provide competent and timely training to 
the Automated Provider's personnel regarding Lab EDI Services.  Such 
installation, set up and training services shall be provided to, and 
connectivity to the Network established for, any Provider or PSC designated 
by SBCL.  If ActaMed identifies a Provider which is a potential new customer 
for Lab EDI Services, it shall so notify SBCL and SBCL shall determine if 
such installation, set up and training services shall be provided to such 
Provider.  SBCL and ActaMed shall [*] to establish [*] to provide guidance on 
[*] of ActaMed suggested Automated Providers.   Prior to any 
installation, set up and training services being rendered hereunder, SBCL and 
ActaMed shall have each entered into an agreement for such Lab EDI Services 
with such new customer which agreement shall contain the provisions set forth 
on EXHIBIT II.B.2(b).

            3.   SPECIAL SERVICES AT PIF SITES.  At up to [*] (the "PIF 
NUMBER") sites selected by SBCL prior to the [*] [*] where 
installation training and set up services are required (the "PIF SITES"), 
SBCL shall be entitled, by written request to ActaMed and payment of the [*] 
set forth in Section IV.B.2, to require that installation, set up and 
training services be provided on a top priority accelerated basis.

            4.   INITIAL ROLL OUT OF ACTALAB SOFTWARE.  After market launch of
the ActaLab Software (which shall be only after the ActaLab Software functions,
features and performance have been accepted by SBCL in accordance with the
Development Agreement and the requirement in this Agreement that it comply with
Regulations),  ActaMed will begin to replace the SCAN Software at ActaMed Sites
with the ActaLab Software in accordance with a roll out plan developed by
ActaMed 


[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -7-
<PAGE>

which shall be designed to deploy the ActaLab Software as quickly as 
practicable with minimal disruption to Automated Providers.  ActaMed shall 
submit the roll out plan to SBCL sufficiently in advance to allow SBCL 
reasonable opportunity to review and comment on the roll out plan prior to 
implementation, and shall use its good faith efforts to incorporate SBCL's 
comments thereon.  Such roll out, however, shall not be made to any Provider 
which has not executed an agreement containing the provisions set forth in 
EXHIBIT II.B.2(a) or (b).

            5.   CUSTOMER SUPPORT.  ActaMed will provide all reasonably
necessary and appropriate end user support for issues relating to connectivity
to the Network utilizing any Network Software in use at such time, including
without limitation, help desk assistance to Automated Providers, hardware
support to applicable Automated Providers, user training and bug fixes to the
Network.  All customer support services shall be performed in a competent and
professional manner meeting or exceeding generally accepted industry standards
for confidential EDI and will be rendered by qualified personnel who will
perform the tasks assigned consistently with good professional practice and the
state of the art involved.  SBCL shall have the right to request the removal
from Automated Providers accounts of any ActaMed personnel used by ActaMed to
perform customer support services, provided such objection would not constitute
unlawful discrimination, if SBCL becomes aware that such person is causing
customer dissatisfaction.  If an objection is raised by SBCL, ActaMed agrees to
confer with SBCL and endeavor to furnish a replacement as quickly as is
practicable. 

            6.   MONITORING.  ActaMed shall continuously monitor its
performance against the Performance Standards and shall notify SBCL at any time
when it fails to meet the Performance Standards.  SBCL shall similarly notify
ActaMed of any such failure, provided that the failure to notify shall not
constitute a waiver of SBCL's rights hereunder.  In the event that ActaMed fails
to meet any Performance Standard at any time, ActaMed shall promptly diagnose
the cause of the failure and shall work continuously and diligently to correct
such failure to perform until it is corrected.  Any failure to meet the
Performance Standards which occurs while ActaMed is working to remedy the
problem shall continue to be counted for the purposes of Section XII.B.1,
Section VII.B.4 and IV.F.

            7.   REPORTS.  ActaMed and SBCL will, at their own expense, provide
the other  with the reports specified on EXHIBIT III.B.7 hereto at the times
specified thereon.

       C.   PERFORMANCE STANDARDS.  "Performance Standards" shall mean the
Network Standards and the Customer Support Standards.  EXHIBIT III.C-1  to this
Agreement specifies the performance standards for the Network which must be
maintained and the applicable time periods for measuring compliance with such
standards (the "NETWORK STANDARDS").   EXHIBIT III.C-2 to this Agreement
specifies the customer support standards ActaMed must achieve and maintain and
the applicable time periods for measuring compliance with such standards (the
"CUSTOMER SUPPORT STANDARDS").  In no event shall the Performance Standards be
less than the comparable Network maintenance and support standards and services
ActaMed utilizes for or provides to its other customers receiving services
comparable to Lab EDI Services.  ActaMed shall have sixty (60) days following
the date 

                                       -8-
<PAGE>

hereof to validate the metric performance level set forth in the Performance 
Standards as representative of SBCL's provision of services which are now 
Agreed Services.  ActaMed shall perform the validation (with cooperation from 
and access to relevant records and data of SBCL) within such sixty (60) day 
period, and based upon the period of [*].  In the event that ActaMed's 
validation process yields a metric different from that set forth in the 
Performance Standards, a new metric for this Agreement shall be mutually 
agreed by SBCL and ActaMed, with any disputes with respect thereto resolved 
in accordance with Section XV hereof.

       D.   SBCL OBLIGATIONS.  SBCL shall have no obligation to provide any
support, training or maintenance services to Automated Providers, other than as
expressly set forth herein.

       E.   Records and Audits.  

            1.   ActaMed shall maintain accurate and complete records 
regarding the transmissions to and from Automated Providers and SBCL in 
accordance with accepted information storage practices in the clinical 
laboratories industry and in compliance with applicable Regulations, but in 
no event for less than [*] or such longer period as may be required by 
Regulations or the Integrity Agreement. 

            2.   The records maintained pursuant to Section III.E.1 above shall
include without limitation records of the amounts ActaMed charges SBCL under
this Agreement, with a system of audit trails, records and controls sufficient
to allow SBCL to audit such transactions and charges under this Agreement and to
assure satisfaction of any requirements imposed on SBCL by their external
auditors or on ActaMed or SBCL by government officials enforcing applicable
Regulations. 

            3.   In addition to the grant of Audit Rights pursuant to Sections
IV.B, IV.C.3 and VI.B of this Agreement, SBCL shall have the right, exercisable
not more often than twice in each calendar year for the first three years after
the date hereof, and once in each calendar year thereafter, to have any of its
agents or employees, who or which are reasonably acceptable to ActaMed, audit,
in accordance with the Audit Rights, the books and records of ActaMed relating
to such SBCL transactions to examine or determine the proper amounts which
should have been billed to SBCL, the amounts which were billed to SBCL, and the
amounts which SBCL has paid under this Agreement.  

            4.   In any exercise of Audit Rights hereunder, including without 
limitation pursuant to Section III.E.3, SBCL shall give ActaMed two week's 
prior notice of any such audit, and shall abide by reasonable ActaMed 
security and confidentiality procedures during the audit.  SBCL and ActaMed 
shall each bear their own costs associated with such audit, provided that in 
the event the audit determines that ActaMed has overcharged SBCL by more than 
ten percent (10%) of the amount properly due ActaMed in any month, ActaMed 
shall pay all costs of such audit.  If the audit reveals an overpayment by 
SBCL to ActaMed, ActaMed shall promptly refund such overpayment to 


[*] CONFIDENTIAL TREATMENT REQUESTED

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<PAGE>

SBCL.  If the audit reveals an underpayment by SBCL, SBCL shall promptly pay 
to ActaMed the amount of such underpayment.

IV.    PAYMENTS TO ACTAMED BY SBCL.

       A.   FEES FOR FIXED FEE SITES.  SBCL will pay ActaMed for the Agreed
Services rendered to Fixed Fee Sites as follows:

            1.   Fixed Fee payments shall be due [*] on the first (1st) 
business day of [*] beginning on January 2, 1998 and shall be in an amount 
equal to 

                 a.   from January 2, 1998 until the day before the first 
business day of [*], [*] per month;

                 b.   from the first business day of [*] until [*].

       B.   TRANSACTION FEE FOR SITES OTHER THAN FIXED FEE SITES.  From the 
Region One Transfer Date and continuing until the day before the [*] SBCL 
will pay to ActaMed, for Agreed Services in respect of sites which are not 
Fixed Fee Sites only, within thirty (30) days after receipt of an invoice 
from ActaMed detailing the charges then due, a fee equal to the sum of [*] 
SBCL in accordance with the Performance Standards during the period covered 
by the invoice (the "TRANSACTION FEE").

       C.   [*].  Provided the conditions set forth in Section IV.D are 
satisfied, SBCL shall pay the following amounts to ActaMed as hereinafter in 
this Section IV.C provided:

            1.   An amount (the "FIRST VARIABLE FEE") equal to (i) [*] minus 
the aggregate of the amount billed to SBCL pursuant to Section IV.B.1 above 
(the "TRANSACTION FEE AMOUNT") prior to the [*]; (ii) [*] minus the sum of 
(A) the Transaction Fee Amount for the period from the date hereof to the [*] 
and (B) the amount paid pursuant to clause (i) above; and (iii) [*] minus the 
sum of (A) the Transaction Fee Amount for the period from the date hereof to 
the [*] and (B) the amount paid pursuant to clauses (i) and (ii) above. 

            2.   An amount (the "SECOND VARIABLE FEE" and together with the 
First Variable Fee, the "VARIABLE FEES") equal to (i) [*] minus the aggregate 
of the amount paid plus amounts owed (whether or not billed) pursuant to 
Section IV.M.1 below (the "PIF AMOUNT") prior to the [*]; (ii) [*] minus the 
sum of (A) the PIF Amount for the period from the date hereof to the 


[*] CONFIDENTIAL TREATMENT REQUESTED

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[*] and (B) the amount paid pursuant to clause (i) above; and (iii) [*] minus 
the sum of (A) the PIF Amount for the period from the date hereof to the [*] 
and (B) the amount paid pursuant to clauses (i) and (ii) above; PROVIDED THAT 
if the PIF Amount with respect to an annual period (other than the last such 
annual period) is at least [*] of the aforementioned dollar amount for that 
annual period, no payment shall be due under this Section IV.B.2 for such 
annual period.

            3.   Subject to Section IV.D, the Variable Fees shall be paid 
annually within thirty (30) days after invoice therefor from ActaMed, which 
shall be (i) submitted to SBCL within [*] (ii) detail the calculation 
thereof, and (iii) reflect the Variable Fees payable in respect of the most 
recently completed annual period only.  SBCL shall have Audit Rights with 
respect to any disputed amount of the Variable Fees.

       D.   CONDITIONS TO [*].  ActaMed and SBCL have agreed that the 
foregoing [*] with respect to the provision of Lab EDI Services after the 
date hereof shall apply (i) [*] and (ii) to the extent set forth in this 
Section IV.D:

            1.   With respect to [*] (i) such fees shall cease to be payable 
if (i) ActaMed shall fail to satisfy any of the Key Performance Standards, or 
(ii) such fees [*] for the applicable year shall not be payable (but shall be 
treated as paid for purposes of calculation of any amount payable in the 
following year) if any of the following shall occur:

                 a.   As of [*] shall [*] of [*] at [*] it has [*] as of [*];

                 b.   As of [*] shall [*] of [*] at [*] it has [*] as of [*];

                 c.   As of [*] shall [*] of [*] at [*] it has [*] as of [*];

            2.   With respect to the [*] such fees shall be payable [*] in 
accordance with the Performance Standards [*] pursuant to Section [*].

       E.   LATE FEE.  A late fee of [*] per month on the unpaid balance of 
any payments owing pursuant to this Section IV after expiration of the thirty 
(30) day period for payment thereof shall be due from SBCL.  


[*] CONFIDENTIAL TREATMENT REQUESTED

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<PAGE>

       F.   [*] OF PAYMENTS.  After the [*] Anniversary, with respect to any 
month after ActaMed has [*] with the [*] for [*] SBCL may, at its option, [*]
 or other [*] to [*] for such month [*] established with [*] to be [*] the 
date as of which [*] with the [*].

       G.   DEFINITION OF FIXED FEE SITES.  "Fixed Fee Sites" shall mean the 
[*] PROVIDED HOWEVER THAT:

            1.   if the number of SBCL Sites transferred to ActaMed on any 
Transfer Date, when added to the number of ActaMed Sites on the date of such 
Transfer, totals more than [*] any sites in excess of [*] (such excess to be 
identified as described in the next sentence) shall not be Fixed Fee Sites.  
The sites to be excluded from Fixed Fee Sites will be (i) from the Region 
transferred on such Transfer Date, and (ii) selected, in order, from a list 
of such sites that is sorted on the basis of the date of the first successful 
Requisition from each site, beginning with the site which had the most recent 
first successful Requisition, and continuing to the sites with the next most 
recent first successful Requisition; and

            2.   if, on the last day of [*] the number of sites that are 
Fixed Fee Sites [*] a number of sites, not to exceed [*] sites in any year, 
that are not Fixed Fee Sites [*] PROVIDED THAT the aggregate number of Fixed 
Fee Sites [*].  The [*] will be [*] in order, from a list of [*] that is 
sorted on the basis of the date of the first successful Requisition from a 
site, beginning with the site on such list which had the least recent first 
successful Requisition, and continuing to the sites with next least recent 
first successful Requisition; [*].

       H.   RENEGOTIATION OF PRICES.  For a period of at least [*] prior to 
[*] the parties will negotiate new Transaction Fees which shall apply for 
the [*] period beginning on [*].  The parties will thereafter similarly 
negotiate new Transaction Fees for each two (2) year period thereafter for 
each renewal period in the term of this Agreement.  [*]


[*] CONFIDENTIAL TREATMENT REQUESTED

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<PAGE>

[*].

       I.   EFFECT OF [*] CHANGES.  If either of the following occurs, then 
the parties agree to negotiate in good faith to restructure the Transaction 
Fees payable or other provisions hereunder in a manner that will be fair to 
both parties while at the same time preserving the economic expectations of 
the parties under this Agreement to the greatest extent possible and in a 
manner consistent with the [*].  Any dispute as to the amendments to this 
Agreement to be made in the event of a [*] shall be settled in accordance 
with the procedures set forth in Article XV hereof.

            1.   Any [*] is [*] or determined to [*] including without 
limitation any significant reduction in SBCL's [*] or significant increase in 
the [*] as compared to SBCL's [*] and [*] as of the date of this Agreement  
as set forth on EXHIBIT IV.I hereto (which shall be delivered within thirty 
(30) days after the date hereof); or

            2.   if the Automated Providers' [*] such that the effective [*] 
for such period [*] with no corresponding [*].

       J.   PHONE LINE TRANSFER COSTS.  SBCL shall reimburse ActaMed for [*] 
of any charges, assessments, fees or other amounts incurred by ActaMed for 
the transfer of any dedicated phone lines installed in Automated Providers' 
offices for Lab EDI Services into the ActaMed name, including without 
limitation any transfer fees or new installation fees.

       K.   ActaMed Obligations Regarding Hardware.  

            1.   ActaMed shall reimburse SBCL for the cost of hardware
purchased by SBCL and located at SBCL Sites other than Fixed Fee Sites in a
Region to be transferred to ActaMed on a Transfer Date.

            2.   Subject to the limitations of Section III.L.2(b) hereof, 
ActaMed and SBCL understand and agree that, [*] are to [*] for providing [*] 
to Providers, there will be situations where [*] is [*] for ActaMed to 
provide Lab EDI Services to certain Providers.  ActaMed desires that the 
number of such new sites be capped.  SBCL and ActaMed have therefore agreed 
that:

[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -13-
<PAGE>

                 a.   ActaMed shall provide [*], PC Systems for up to [*].  
ActaMed may provide hardware for such [*] by either moving existing PC 
Systems from a canceled Fixed Fee Site or by providing new PC Systems, as it 
determines in its sole discretion.

                 b.   In addition, ActaMed shall provide, prior to the [*] 
Anniversary, [*] PC Systems for New Sites or [*] in excess of the [*]. 
Notwithstanding the above, this obligation shall be (a) limited to [*] PC 
Systems prior to the [*] and (b) reduced by each PC System the cost of which 
is reimbursed to SBCL subject to Section IV.K.1 above.

                 c.   Any PC Systems in excess of those required to be provided
by ActaMed under (i) and (ii) above may be provided by SBCL to the Automated
Provider, subject only to the Automated Provider entering into a contract with,
and satisfactory to, SBCL for the use of such PC System.

       L.   SPECIAL FEE FOR USE OF SCAN DEVELOPMENTS.  SBCL will pay ActaMed 
a fee equal to [*], or [*] received by SBCL for [*] that use SCAN 
Developments for Lab EDI Services over the SCAN Network and which [*].

       M.   SPECIAL FEES FOR NEW SITES.  From the Region One Transfer Date 
and continuing until the day before the [*], SBCL will pay to ActaMed, within 
thirty (30) days after receipt of an invoice from ActaMed detailing the 
charges then due, the following amounts:

            1.   a one time fee of [*] for [*] services at each PIF Site [*] 
or "PIF"); and

            2.   up to the first [*] of any out-of-pocket cost required to be 
incurred by ActaMed to provide the bar code label printer to be used for 
orders to SBCL Labs at any New Site or any [*] during the period covered by 
the invoice. ActaMed shall charge the Automated Provider [*] using the bar 
code label printer for anything other than Lab EDI Services for the fair 
market value of any such use. If an Automated Provider ceases to use Lab EDI 
Services, SBCL may direct where the printer previously installed at such 
Automated Provider will be next installed or ActaMed shall purchase, at its 
cost and without reimbursement under this Section IV.M.2, a bar code label 
printer for installation at another Automated Provider's location to be 
determined by SBCL.

       N.   DISPUTED INVOICES.  In the event SBCL disputes any amount shown due
on such invoice, SBCL shall send a Dispute Notice to ActaMed.  In such event,
SBCL shall timely pay any undisputed amount to ActaMed and shall have Audit
Rights with respect to the portions of ActaMed's books and records that relate
to the subject of the dispute.  In the event the parties are unable to resolve
the disputed matter, the matter shall be resolved in accordance with Section XV


[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -14-
<PAGE>

hereof and application of any late fee to such disputed amount shall be 
tolled until conclusion of such proceedings and then applied only to the 
amount so determined to be due.

V.     CHANGES AND DEVELOPMENT OF NEW FUNCTIONALITY.

       A.   MAINTENANCE.  ActaMed shall provide such maintenance upgrades and
updates to the Network as set forth on EXHIBIT V.A and shall maintain and
enhance the Network so as to improve from time to time the speed, accuracy,
security and other features and functions available for Lab EDI Services. 
ActaMed shall make available to Automated Providers all such modified, upgraded,
enhanced or improved services or software at no additional charge except as
permitted by this Agreement or applicable agreement with Automated Providers.

       B.   YEAR 2000 COMPLIANCE.  ActaMed shall provide, without charge to
SBCL or to Automated Providers (unless the Automated Providers own the PC
Systems needing Year 2000 compliance), such maintenance and hardware upgrades
and updates to the Network (other than the SBCL gateway), or other software
relating (or which will relate) to Lab EDI Services as is necessary for all such
software and related hardware to include acceptable design and performance
specifications so that any or all such software will not abruptly end or provide
invalid or incorrect results due to issues related to Year 2000 compliance and
will otherwise be in compliance with the warranties set forth in EXHIBIT V.B
hereto. Year 2000 compliance requires that the design and performance
specifications of the hardware, software and/or other items include, without
limitation:  date data century recognition, calculations that accommodate same
century and multi-century formulas and date values, and date data interface
values that reflect the century change at the year 2000.  SBCL shall provide
specifications for Year 2000 compliance for SBCL systems in sufficient time to
allow ActaMed and SBCL to mutually agree on and ActaMed to complete such
modifications as are necessary to enable ActaMed to meet the requirements of
this Section V.B.  SBCL will also provide reasonable cooperation and assistance
to ensure ActaMed's understanding of the requirements of this Section V.B. 
Prior to any sale of PC Systems to any Automated Provider or potential Automated
Provider, ActaMed shall disclose to such Automated Provider any Year 2000
compliance problems of such PC System which are then known to ActaMed after
reasonable inquiry.  A condition of any such sale shall be appropriate
arrangements for making the PC System to be sold Year 2000 compliant.  In this
regard, the sales price shall reflect the fair market value of the services
required to make the PC System Year 2000 compliant.

       C.   REQUIRED CHANGES.  ActaMed shall be required to develop and 
implement, at its expense except to the extent hereinafter provided, as 
promptly as practicable and in no event later than thirty (30) days prior to 
the effective date of the applicable Regulatory Change, any Changes which (i) 
ActaMed determines are required for the Network Software to remain in 
compliance with all applicable Regulations, or (ii) SBCL requests in writing 
to ActaMed for compliance with Regulations of the Network Software.

            1.   If SBCL reasonably determines that ActaMed cannot provide such
required work by thirty (30) days prior to a deadline imposed by governmental
authority, SBCL shall have the 


[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -15-
<PAGE>

right to contract with a third party for such work or to do such work itself. 
In such event, SBCL shall be reimbursed therefor by ActaMed, except as 
provided in Section V.C.3 below.  

            2.   Upon reasonable advance written notice to ActaMed, SBCL may
request,  and if it so requests ActaMed shall use its good faith efforts to
accommodate, prioritization of such Changes over any other software development
work performed by or on behalf of ActaMed.

            3.   In any event, upon reasonable advance notice to ActaMed, SBCL
shall be entitled to change the prioritization of required Changes from time to
time and to resolve conflicts between Changes demanding equal prioritization to
the extent necessary to deliver any such Change not less than thirty (30) days
prior to any government imposed deadlines or as promptly as practicable.

            4.   If ActaMed disputes that Changes requested by SBCL pursuant 
to clause (ii) of Section V.C are required by Regulations, either ActaMed or 
SBCL shall be entitled to cause the dispute to be resolved in accordance with 
the procedures set forth in Section XV.B.1.a and XV.B.1.b thereof.  If such 
process is used and results in substantial agreement with either (i) ActaMed, 
then [*] (including the cost of FTEs) in implementing such Changes, or (ii) 
SBCL, [*].  If such process is not used or does not result in an agreement as 
to whether or not such Change is required by Regulations, ActaMed and SBCL 
shall mutually agree on an outside counsel familiar with issues of the nature 
involved in the dispute and the opinion of such counsel shall be binding on 
the parties hereto.

       D.   ACTAMED DEVELOPED NEW FUNCTIONALITY.  When ActaMed develops new 
functionality for the Network that ActaMed offers generally to its customers, 
which is not included in a maintenance release that ActaMed offers generally 
to its customers pursuant to Section V.A. above, ActaMed will offer such new 
functionality to Automated Providers on the same basis [*] subject to SBCL's 
right to accept or reject such new functionality.

       E.   Development Work Requested by SBCL.  

            1.   SBCL at any time may request that ActaMed perform additional
development work and, subject to the terms of this Section V.E, shall pay
ActaMed for such work at no higher than the then industry standard rates for
similar services.

                 a.   If SBCL requests in writing that ActaMed provide 
additional development work for use exclusively by SBCL and, regardless of 
whether ActaMed or a third party actually performs such development work, 
ActaMed shall either (i) [*] in which case such work shall be a "Perpetual 
Exclusive Development", or (ii) acting in good faith, [*] in which case such 
work shall be a "Temporary Exclusive Development".  With respect to Perpetual 
Exclusive Developments, ActaMed will not use or license 


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                                       -16-
<PAGE>

the use of the Perpetual Exclusive Developments (without regard to whether 
they constitute SCAN Developments or ActaLab Software) other than in support 
of Lab EDI Services. With respect to Temporary Exclusive Developments, 
ActaMed will not use or license the use of Temporary Exclusive Developments 
(without regard to whether they constitute SCAN Developments or ActaLab 
Software) other than in support of Lab EDI Services for a period of [*] from 
the date on which ActaMed first makes available to SBCL such Temporary 
Exclusive Development for use on a commercial basis in support of SBCL's 
laboratory testing services.  After expiration of such [*] period, subject to 
resolution of any dispute relating to ActaMed's initial designation of such 
development work as a Temporary Exclusive Development pursuant to Section 
V.E.1.b,  such Temporary Exclusive Development shall no longer be an 
Exclusive Development.

                 For purposes of this Section V.E, Perpetual Exclusive
Developments and Temporary Exclusive Developments shall include any Changes made
pursuant to Section V.C and paid for by SBCL by reason of Section V.C.4, to be
designated as Perpetual Exclusive Developments or Temporary Exclusive
Developments in accordance with the procedures set forth in this Section
V.E.1.a.  All such developments are herein referred to collectively as
"Exclusive Developments."

                 b.   Within twenty (20) days after receiving SBCL's request
pursuant to Section V.E.1.a, ActaMed shall notify SBCL of ActaMed's prices and
terms for performing such development work, and whether such work will
constitute a Perpetual Exclusive Development or a Temporary Exclusive
Development.  If SBCL provides notice ("Acceptance Notice") accepting ActaMed's
price and performance terms, ActaMed shall perform such work at the accepted
price and on the accepted performance terms.  If SBCL provides notice that it
disputes ActaMed's determination that the development work should constitute a
Temporary Exclusive Development, the parties shall resolve the dispute in
accordance with Section XV.  If either (i) ActaMed declines any work requested
pursuant to this Section V.E.1, or (ii) SBCL provides notice that it does not
accept ActaMed's price and performance terms, then SBCL may engage a third party
to perform such work.

                 c.   Any contract between ActaMed and SBCL (or a third party
developer and SBCL) for development of Exclusive Developments shall allocate
ownership of and other rights with respect to the Exclusive Developments as
between ActaMed and SBCL, in the manner contemplated by the License Agreement
and Development Agreement, including, without limitation, Sections 2.1.4 and
2.3.2 of the License Agreement.

            2.   If, at any time, SBCL chooses to contract with ActaMed for a
dedicated services team from ActaMed to handle development of Changes to the
Network, the Licensed Materials, or SBCL's proprietary systems which are not
required to be performed by ActaMed pursuant to Section V.C and which are not
requested pursuant to Section V.E, ActaMed may elect whether to provide the
dedicated team and, if it so elects, shall do so only on terms and conditions
agreed to in advance by SBCL.


[*] CONFIDENTIAL TREATMENT REQUESTED

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<PAGE>

       F.   Development Work Requested or Used by Another ActaMed Customer.   

            1.   When ActaMed performs development work on the Network at the 
request of another ActaMed customer, SBCL shall have the right to obtain [*] 
but only for so long as ActaMed has the legal right to [*] to SBCL and [*] is 
not proprietary to the contracting party.

            2.   When ActaMed performs development work on the Network at the
request of SBCL and such work is usable in connectivity with Other Labs (and is
not an Exclusive Development), [*].

       G.   ACCESS AND COOPERATION.  Whenever SBCL shall use a third party 
developer, ActaMed shall allow such third party such access to the Network as 
shall be reasonably necessary to complete such work and shall cooperate with 
such third party, PROVIDED THAT such access and cooperation shall be subject 
to such third party (i) executing reasonable and appropriate security and 
confidentiality agreements with ActaMed, (ii) abiding by ActaMed's internal 
policies applicable to all third party developers, and (iii) agreeing to [*] 
in providing such access and cooperation.

       H.   EMPLOYEE WAIVERS.  ActaMed shall ensure that all employees or
agents who perform customer support services or have access to any Network
Software (whether in preliminary or final form) have signed non-disclosure and
assignment agreements that, at minimum, contain provisions (i) prohibiting the
disclosure of Confidential Information to the same extent as is set forth in
Section X hereof, and (ii) effecting the complete transfer and assignment
(without further consideration) by such employee or agent to SBCL or ActaMed, as
appropriate, of all right, title and interest to all software and documentation
and any proprietary rights thereto to the extent required pursuant to the
License Agreement.

       I.   STATEMENT OF WORK AND ACCEPTANCE FOR NEW WORK.  In the event any 
Change projected to cost in excess of [*] is to be made by ActaMed pursuant 
to this Section V, ActaMed shall deliver a Statement of Work therefor within 
thirty (30) days after the Change becomes known to it and shall, subject to 
the other provisions of this Section V, dedicate sufficient resources to the 
development and implementation of such Change as shall be necessary to gain 
acceptance of and deploy the Change in accordance with such Statement of Work.

VI.    COMPLIANCE MATTERS.

       ActaMed is a computer technology company which provides electronic
connectivity services, and is not a health care provider.  ActaMed acknowledges
that, for a laboratory services provider such as SBCL, the ability to assure
that it complies with applicable laws, rules or regulations ("Applicable Laws"),
including, but not limited to, the federal Physician Self-Referral Law, 42


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<PAGE>

U.S.C. 1395nn, and the regulations promulgated thereunder (together, the "Stark
Law"), similar state physician self-referral laws and regulations (together with
the Stark Law, the "Self-Referral Laws"), the federal Medicare/Medicaid
Antikickback Law and regulations promulgated thereunder (the "Federal
Antikickback Law"), and similar state antikickback laws and regulations
(together with the Federal Antikickback Law, the "Antikickback Laws"), is of
critical importance.  SBCL and ActaMed intend that the outsourcing of the Lab
EDI Services to ActaMed and the subsequent provision of the Agreed Services by
ActaMed to SBCL be done in a manner that allows SBCL to maintain its compliance
with Applicable Laws.  Accordingly, SBCL and ActaMed have agreed to the
provisions set forth in this Section VI, although SBCL and ActaMed understand
and agree that the provisions of this Section VI and of the separate SOPs (as
defined below) that may be agreed to from time to time by SBCL and ActaMed may
not be necessary or may be more restrictive than necessary to assure SBCL's
continued compliance with Applicable Laws.

       A.   Representation, Warranty and Covenant.  ActaMed represents,
warrants, and covenants to SBCL as follows:

            1.   ActaMed will not directly or indirectly provide any
remuneration, as defined in the applicable Self-Referral Laws or Antikickback
Laws, to any Provider to whom any of such Self-Referral Laws or Antikickback
Laws applies on behalf of SBCL, except for direct or indirect remuneration
permitted by such law.

            2.   In furtherance and not in limitation of the foregoing, SBCL
and ActaMed may, from time to time, agree upon certain principles, activities,
agreements, standard operating procedures and/or actions (the "SOPs") that one
or both parties, as applicable, will follow or undertake to help SBCL assure its
compliance with Applicable Laws, and each party will follow any such SOPs
applicable to it in the course of conducting its respective business.

            3.   With respect to [*] to which ActaMed is [*] in connection 
with the provision of Lab EDI Services, ActaMed will not [*] [*] unless and 
until SBCL has informed ActaMed in writing that it is willing to [*] and that 
ActaMed and SBCL have agreed upon [*].

            4.   ActaMed will provide any reasonable assistance that SBCL may
request from ActaMed, including the provision of information or other
assistance, in order for SBCL to fulfill any obligation that SBCL, in its sole
discretion, determines it has under the Integrity Agreement.  Notwithstanding
the foregoing, nothing in this provision is intended to or should be interpreted
to mean that ActaMed is subject to any of the provisions of the Integrity
Agreement.

            5.   In the event that SBCL becomes aware of an issue with respect
to compliance with this Section VI, SBCL will promptly inform ActaMed of such
issue and ActaMed will promptly address such issue and take action to remedy any
such issue to the reasonable satisfaction of SBCL.


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<PAGE>

            6.   ActaMed will notify SBCL of any proposed changes in ActaMed's
business practices with respect to EDI or the provision of LAB EDI Services 
that are likely to affect SBCL or Automated Providers (other than [*]) a 
reasonable period prior to the proposed implementation of such change or 
changes and will provide SBCL with a reasonable opportunity to review those 
proposed changes for compliance with this Section VI prior to implementation. 
If [*] any such [*] based on an [*] or the [*], [*] with [*] to [*] before [*].

       B.   AUDIT RIGHTS.  SBCL shall have Audit Rights, exercisable [*] 
with respect to all of ActaMed's books, records and other materials that 
relate to any compliance issues covered by this Section VI in order for SBCL 
to determine ActaMed's fulfillment of its obligations hereunder or under any 
separately agreed upon SOPs.  When ActaMed enters into agreements with 
Providers, it will use its best efforts to secure the right for ActaMed and, 
if such Provider is an SBCL client, for SBCL, to audit such Provider's books 
and records, and other materials and/or to inspect the Provider's premises to 
assure that any compliance requirements established with such Provider are 
being satisfied, and, upon request from SBCL, ActaMed will permit SBCL to 
exercise such rights.  In any exercise of Audit Rights under this Section 
VI.B, SBCL shall give ActaMed two (2) weeks' prior written notice of any such 
audit, and shall abide by reasonable ActaMed security and confidentiality 
procedures during the audit.  SBCL and ActaMed shall each bear their own 
expenses associated with such audit.

       C.   DISPUTE RESOLUTION.  Notwithstanding any other provision of this
Agreement to the contrary, because of the critical nature of compliance to
SBCL's business, disputes regarding compliance with this Section VI may not be
susceptible to resolution following normal dispute resolution mechanisms.  In
the event that SBCL and ActaMed have a disagreement or dispute regarding
compliance with this Section VI, ActaMed agrees to use its best efforts in
working with SBCL to attempt to resolve that dispute as soon as possible.  If
the parties are not able promptly to resolve any such dispute, and the parties
are not able to agree upon another mechanism, such as that provided for in
Section V.C.4 hereof, to resolve the issue, SBCL shall have the right to
exercise any and all remedies available to it under this Agreement, including
the right to terminate the Agreement.

VII.   PREFERRED LAB EDI VENDOR.

       A.   PREFERRED LAB EDI VENDOR RELATIONSHIP.   Provided none of the 
events has occurred which is described in Section VII.B hereof, SBCL will, [*]
afford ActaMed "preferred Lab EDI Vendor" status in the United States to 
the extent set forth in this Section VII.  In this regard, SBCL will:

            1.   instruct its salespeople that when occasions arise where it is
appropriate to do so, inform Providers interested in Lab EDI Services that
ActaMed is its preferred vendor for all Lab EDI Services;


[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -20-
<PAGE>

            2.   indicate that ActaMed is SBCL's preferred vendor for Lab EDI
Services in appropriate communications, whether internal or external, written or
oral, as determined by SBCL that relate to the topic of Lab EDI Services and
where a Lab EDI Services vendor is mentioned; 

            3.   from the date when the ActaLab Software is approved by SBCL
for use by Automated Providers, (i) cause the marketing materials for SCAN
Software to be revised to feature the ActaLab Software; and (ii) train the SBCL
salespeople at no direct expense to ActaMed regarding the general features and
benefits of the ActaLab Software;

            4.   instruct its salespeople of the benefits to SBCL of ActaMed's
preferred status so that whenever they undertake sales efforts or negotiations
with a Provider whom SBCL believes to be a significant future customer for Lab
EDI Services with an SBCL Lab, or with a significant Automated Provider serviced
by ActaMed, insofar as it is known to the salesperson, for renewal or extension
of lab testing services at an SBCL Lab, if appropriate, invite representatives
from ActaMed to be included in such sales efforts and negotiations, so that
ActaMed may promote the use of the ActaLab Software to such customer;

            5.   inform appropriate third parties, including but not limited to
practice management system companies, electronic medical record vendors and
other EDI clearinghouses interested in establishing Lab EDI Services (or
services relating thereto) with SBCL, that, ActaMed is SBCL's preferred provider
for Lab EDI Services, and suggest that, provided ActaMed has the capabilities
sought by the third party, the third party pursue a contractual relationship
with ActaMed regarding such Lab EDI Services. 

       B.   LIMITATIONS ON PREFERRED PROVIDER STATUS.  The provisions of
Section VII.A shall apply unless and until any of the following occurs: 

            1.   ActaMed ceases to offer products and services which have
features and functionality which are substantially comparable to other similar
products and services of similar vendors for services in the nature of Lab EDI
Services; SBCL provides written notice of same and, within thirty (30) days
after such notice is given, ActaMed fails to demonstrate to SBCL's reasonable
satisfaction that such determination is not accurate. 

            2.   An Other Lab becomes a shareholder of ActaMed; provided that,
after ActaMed has consummated a Qualified Public Offering (as defined in
ActaMed's Fourth Amended and Restated Articles of Incorporation), this clause 2
shall apply only if the Other Lab becomes a shareholder of ActaMed by reason of
either an issuance of equity to the Other Lab by ActaMed or waiver of
restrictions in agreements between ActaMed and its stockholders which are
comparable to the Standstill Agreement between ActaMed and SBCL dated the date
hereof.

            3.   Any of the events described in clauses 2 through 5 of Section
XII.B shall have occurred (without regard to grace periods otherwise applicable
thereto and other than an event under clause 7 thereof which is based upon a
failure of SBCL to pay amounts due from it hereunder).

                                       -21-
<PAGE>

            4.   ActaMed fails to meet any of the Performance Standards in [*]
or [*].

            5.   Any of the events described in Article X of the Assets
Purchase Agreement shall have occurred.

            6.   In the event that SBCL merges with or into, or acquires or 
is acquired by an entity, owning or operating a clinical laboratory, or sells 
substantially all of its assets to another entity in a transaction in which 
this Agreement is assigned to such entity, SBCL shall have the right to elect 
to have the preferred provider status removed with respect to such other 
entity, PROVIDED THAT the [*] set forth in Section IV.C and D hereof shall 
remain in effect after such transaction; and PROVIDED FURTHER THAT before 
exercising such right, SBCL shall have used its good faith efforts to 
preserve the original intention of the parties hereto.

       C.   EXCLUSIONS.  Notwithstanding anything to the contrary contained 
in this Agreement, including without limitation this Section VII, SBCL shall 
be entitled without restriction and in its sole discretion, to (i) utilize or 
change any EDI system for purposes of connectivity between an SBCL Lab and a 
Provider [*], or between SBCL Labs, utilizing Lab EDI Services that SBCL has 
already established or begun to establish connectivity capabilities as of the 
date hereof, including without limitation those set forth on EXHIBIT VII.C-1 
which Exhibit shall be delivered by January 15, 1998 and shall represent 
SBCL's best efforts to identify all such capabilities which are significant 
to SBCL; (ii) terminate or not renew its current contracts or arrangements 
with third parties relating to Lab EDI Services;  (iii) pursue future 
arrangements or relationships for Lab EDI for any exclusion described in 
EXHIBIT VII.C-2, and (iv) utilize or change any EDI system between SBCL Labs 
and other facilities owned, managed and/or operated by SBCL.

       D.   EXCLUSIONS FOR [*].  Notwithstanding anything to the contrary 
contained in this Agreement, including without limitation this Section VII, 
SBCL shall be entitled without restriction and in its sole discretion, to 
change, continue to use or install [*]. At some time in the future, SBCL will 
consider a proposal from ActaMed for some or all of these [*] transactions 
and enter into reasonable negotiations, if appropriate.  For a period of [*] 
from the date hereof, SBCL will not [*] Lab EDI Services without notifying 
ActaMed and affording ActaMed opportunity to propose to provide such services.

       E.   FUTURE ACTAMED PARTICIPATION IN EXCLUDED ARRANGEMENTS.  
Notwithstanding Section VII.C above, SBCL will endeavor to include ActaMed in 
opportunities relating to the arrangements identified in Section VII.C(iii) 
to the extent feasible and appropriate as determined by SBCL for Lab EDI or 
physician connectivity. The nature and pricing of ActaMed's involvement will 
be negotiated on a case by case basis. 


[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -22-
<PAGE>

       F.   ELIGIBILITY AND CLAIMS PROCESSING SERVICES.  During the initial 
term of this Agreement, SBCL will use all reasonable business efforts, 
consistent with its competitive needs in the lab testing business, to utilize 
ActaMed as SBCL's preferred provider of electronic eligibility verification 
and claims processing services to provide connectivity with all third party 
payers with which SBCL desires connectivity and ActaMed is then connected,  
PROVIDED THAT this Section VII.F shall apply only if (i)  SBCL desires to use 
an outside vendor for such services, and (ii) the prices proposed to be 
charged by ActaMed for such services are [*]. In furtherance of such "preferred"
status, SBCL shall offer ActaMed as one of the potential providers of such 
services in any written response to a request for proposals for lab testing 
services.  For each written SBCL proposal for the provision of such services, 
SBCL shall provide ActaMed with a copy of the sections thereof describing 
ActaMed's proposed services.  SBCL shall provide ActaMed with such reasonable 
opportunity as circumstances permit to review and correct or comment on any 
such proposed language.    Notwithstanding the foregoing, SBCL shall not be 
obligated to comply with the provisions of this Section VII.F in those cases 
in which (i) the payer designates (in the request for proposals or otherwise) 
a provider of such services other than ActaMed, or (ii) it would violate any 
Regulation, contractual provision or obligation by which SBCL is bound.

       G.   FURTHER EXCLUSIONS FOR NON-LABORATORY EDI. Nothing contained herein
shall prohibit SBCL from engaging in or contracting with third parties relating
to non laboratory related EDI transactions including but not limited to the
following, as long as each of the following is not intended primarily as a
connection from an Automated Provider to a network for the purposes of Lab EDI
Services (or services related thereto):  [*].

VIII.  COOPERATIVE RELATIONSHIP.

       A.   COOPERATION.   Upon SBCL request, ActaMed will work with SBCL's
sales people to generate site connectivity and will use reasonable efforts to be
available to perform the technical portions of sales presentations made by
SBCL's sales people.

       B.   USE OF OTHER PARTIES' NAME.  Each party shall have the right to
include the other party's name on its client or vendor list and to disclose the
nature of the services and products provided under this Agreement, so long as
such services and products are accurately represented; PROVIDED, HOWEVER, that
neither party has the right to use the other's name, trademarks or trade names
for other advertising, sales promotion, or publicity purposes without the
other's prior written consent.


[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -23-

<PAGE>

       C.   USER GROUP.  ActaMed will establish a user group, to consult on
priorities and provide direction to ActaMed on system initiatives, which will
include representation from SBCL, Automated Providers and payers.  At regular
intervals not less frequently than annually ActaMed will solicit user
suggestions, input and feedback regarding the Network.

       D.   ACTAMED'S OBLIGATION TO PROMOTE SB FOR DISEASE MANAGEMENT.  For so
long as ActaMed is SBCL's preferred vendor pursuant to Section VII, ActaMed will
undertake actions similar to those set forth in Section VII.A to promote
SmithKline Beecham Corporation's Healthcare Services Division for the Disease
Management Business.  "DISEASE MANAGEMENT BUSINESS" shall be defined in a
separate writing reasonably agreed upon by the parties within thirty (30) days
after the date hereof.

       E.   REFERENCE CHECKS.  SBCL shall designate one or two individuals who
shall respond to a reasonable number of reference inquiries and visits (not to
exceed two visits in any calendar month) by customers and potential customers of
ActaMed on mutually agreeable terms.  SBCL shall retain the right to refuse a
visit to any competitor or potential competitor of SBCL or to terminate the
visit of any customer or potential customer who does not abide by SBCL's
policies and procedures.  ActaMed shall inform all customers and potential
customers allowed on SBCL's premises pursuant to this Section that they are
required to abide by SBCL's policies and procedures.

IX.    SBCL'S OBLIGATIONS REGARDING THE NETWORK.

       A.   STANDARD FORMATS AND PROTOCOLS.  SBCL shall receive and generate
transaction data and any other Lab EDI in a standard format and protocol
mutually agreed upon by the parties.

       B.   HARDWARE AND OPERATING ENVIRONMENT.  SBCL shall provide, at its own
expense, all necessary hardware, including terminal equipment, compatible with
and suitable for its communications with the Network at the SBCL Labs.  ActaMed
shall verify SBCL's operating environment with testing procedures implemented by
ActaMed from time to time, with advance notice to and approval from SBCL, which
approval shall not be unreasonably withheld or delayed.

       C.   NEW RELEASES OF SBCL PROPRIETARY SOFTWARE.   SBCL will make
available to ActaMed all new releases and specifications for the SBCL gateway so
as to enable ActaMed to maintain the ActaMed Gateway substantially the same as
the SBCL gateway, including for Year 2000 compliance.  In addition, SBCL will
give ActaMed advance notice of test code changes, new releases of SBCL
proprietary software and other SBCL host computer system changes (including host
computer systems operated by third party outsourcers on behalf of SBCL), if such
changes or releases will affect ActaMed's ability to transmit information over
the Network.  If any changes are required to the Network by reason of such
actions by or on behalf of SBCL, the parties will mutually agree (consistent
with Section V hereof) in advance on the scope of the project, the deliverables,
deadlines, any fees ActaMed will charge SBCL, a test plan and an acceptance test
plan.

                                       -24-
<PAGE>

X.     CONFIDENTIALITY AND SECURITY.

       A.   DATA CONFIDENTIALITY.  Each party agrees that patient clinical
records are Confidential Information and each party shall not disclose or
utilize individual lab test information in any way that would violate any
patient confidentiality obligation or any Regulations.   Without limiting
ActaMed's obligations regarding Confidential Information which may be otherwise
provided for in this Agreement, ActaMed shall be responsible to ensure the
confidentiality of test results and patient information transmitted over the
Network, in accordance with all applicable Regulations governing such patient
confidential information, including to prevent anyone other than the sender and
addressee of Transmittal Information or their respective authorized employees
from monitoring, using, gaining access to or learning the import or contents of
any Transmittal Information.

       B.   DISTRIBUTION AND USE OF DATA.  All Transmittal Information entered
onto the Network by SBCL or any Automated Provider from tests referred to SBCL,
shall be owned by SBCL and not by ActaMed. ActaMed shall not aggregate,
integrate, compile, regenerate, merge, manipulate or otherwise use the
Transmittal Information for any purposes and shall not provide the Transmittal
Information to any other person or entity, other than as specifically required
or allowed under the terms of this Agreement to perform the Agreed Services,
without the prior written consent of SBCL.  ActaMed agrees that such information
cannot be aggregated for any Provider or among different customers' or other
health care providers or laboratory service providers for any purpose, without
SBCL's prior written consent.

            1.   If ActaMed is served with a warrant, subpoena or any other
order or request from a governmental body or any other entity or person for any
records or files of information transmitted over the Network, ActaMed will as
soon as practicable, and not in violation of law, deliver to SBCL a copy of such
warrant, subpoena, order or request and will not, without SBCL's prior written
consent, accede to the same unless and until required to do so under applicable
law.

            2.   ActaMed acknowledges and agrees that in the event it has 
access to confidential data relating to an Automated Provider and/or the 
Automated Providers's patients, employees and medical staffs, ActaMed will 
hold such information in the strictest confidence and will not, without 
SBCL's prior written consent, disclose any such information, including 
without limitation in any regeneration, recompilation, or reorganization 
thereof, or through any statistical analyses or provision of other excerpts 
thereof.  Without limiting the foregoing, ActaMed agrees that it shall limit 
the ActaMed employees who have access to any patient identifiable health 
information, including without limitation, laboratory test order or results 
information, if any, to only those "need to know" employees of ActaMed as is 
required to perform the Agreed Services to the level of the Performance 
Standards set forth herein.  Such employees shall be identified to SBCL in 
advance of such access and shall have executed and delivered to ActaMed and 
to SBCL, an agreement requiring non-disclosure of confidential information, 
compliance with all ActaMed policies and procedures with respect to 
Confidential Information and security of the Network (which shall be 
consistent with the requirements in this Agreement), if applicable, 
procedures established by SBCL and shall include an acknowledgment of 
immediate termination for breach of such agreement.  To the extent any

                                       -25-
<PAGE>

employee of ActaMed acquires such access to patient health information through
any SBCL computer systems, or [*] ("SBCL ACCESS"), ActaMed shall cause such
employees to abide by SBCL's [*] Security Access procedures, and shall
deliver to SBCL such agreements reflecting same as may be required by SBCL and
identified to ActaMed in writing from time to time.  ActaMed shall be
responsible for promptly notifying SBCL if any employee with SBCL Access is
terminated or leaves the employment of ActaMed.

            3.   Subject to the requirements of Section X.A, ActaMed may, at 
[*] of [*] to such [*] for which the [*] from such [*] without the [*] SBCL. 
There shall be [*] such [*].

            4.   Subject to Section X.A and without limiting the above 
restrictions in this Section X.B, ActaMed [*] without the [*]. A copy of [*] 
shall be provided to SBCL.  ActaMed agrees that, if SBCL's consent is 
obtained, [*] to Automated Providers shall be made available only in 
accordance with all applicable patient confidentiality laws of the states [*]
the patient and SBCL Labs and ActaMed are located, and only [*] or [*].  SBCL 
shall have Audit Rights with respect to any disputed amounts hereunder.

       C.   TRADE SECRET NONDISCLOSURE COVENANT.  Without limiting the
foregoing, Trade Secrets and Confidential Information and all physical
embodiments thereof received by either party (the "RECEIVING PARTY") from the
other party (the "DISCLOSING PARTY") during the term of this Agreement,
including those received pursuant to the exercise of Audit Rights as described
in Section III.E hereof, are confidential to and are and will remain the sole
and exclusive property of the Disclosing Party.  In furtherance of the
foregoing:

            1.   At all times, both during the term of this Agreement and 
after its termination, the Receiving Party shall hold all Trade Secrets of 
the Disclosing Party in confidence, and will not use, copy or disclose such 
Trade Secrets, or any physical embodiment thereof, or cause any of such Trade 
Secrets to lose their character as Trade Secrets.  At all times during the 
term of this Agreement and for a period of [*] following the termination of 
this Agreement, (except where a longer period is required pursuant to this 
Agreement or Regulations) the Receiving Party shall hold the Confidential 
Information of the Disclosing Party in confidence, and will not use, copy or 
disclose such Confidential Information, or any physical embodiments thereof, 
or cause any of such Confidential Information to lose its character or cease 
to qualify as Confidential Information.


[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -26-
<PAGE>

            2.   Trade Secrets and Confidential Information shall be maintained
under secure conditions by the Receiving Party, using reasonable security
measures and in any event (1) not less than the same security measures used by
the Receiving Party for the protection of its own Trade Secrets and Confidential
Information of a similar kind, and (2) any specific security measures required
by this Agreement.  The Receiving Party shall not remove, obscure or deface any
proprietary legend relating to the Disclosing Party's rights, on or from any
tangible embodiment of any Licensed Materials without the Disclosing Party's
prior written consent.  Within thirty (30) days after termination of this
Agreement, the Receiving Party shall deliver to the Disclosing Party all Trade
Secrets and Confidential Information, and all physical embodiments thereof, then
in the custody, control or possession of the Receiving Party.

            3.   If the Receiving Party is ordered by a court, administrative
agency, or other governmental body of competent jurisdiction to disclose Trade
Secrets or Confidential Information, or if it is served with or otherwise
becomes aware of a motion or similar request that such an order be issued, then
the Receiving Party will not be liable to the Disclosing Party for disclosure of
Trade Secrets or Confidential Information required by such order if the
Receiving Party complies with the following requirements:  (i) if an already
issued order calls for immediate disclosure, then the Receiving Party shall
immediately move for or otherwise request a stay of such order to permit the
Disclosing Party to take measures such as are described in clause (iii); (ii)
the Receiving Party shall immediately notify the Disclosing Party of the motion
or order by the most expeditious possible means; and (iii) the Receiving Party
shall join or agree to (or at a minimum shall not oppose) a motion or similar
request by the Disclosing Party for an order protecting the confidentiality of
the Trade Secrets and Confidential Information, including joining or agreeing to
(or non opposition to) a motion for leave to intervene by the Disclosing Party.

            4.   The Receiving Party shall immediately report to the Disclosing
Party any attempt by any person of which the Receiving Party has knowledge (i)
to use or disclose any portion of the Trade Secrets and Confidential Information
without authorization from the Disclosing Party, or (ii) to copy, reverse
assemble, reverse compile or otherwise reverse engineer any part of the Trade
Secrets or Confidential Information (except as permitted herein).

       D.   PERMITTED DISCLOSURES.  Notwithstanding any provisions of this
Agreement to the contrary, SBCL may disclose to the OIG as part of the
disclosures SBCL makes under its Integrity Agreement the fact that SBCL and
ActaMed have entered into the transactions contemplated by the parties and any
information relating to such transaction or this Agreement which SBCL
determines, in good faith upon advice of counsel, is required or, in light of
SBCL's obligations under the Integrity Agreement, appropriate for SBCL to make,
or SBCL proposes to make in response to a request for such information from the
OIG, provided that ActaMed shall be given opportunity (which shall be reasonable
in light of all facts and circumstances) to review and comment upon the
information SBCL intends to include in any such submission.  In the event that
any such disclosure that SBCL intends to make includes any information that
constitutes Confidential Information of ActaMed or Trade Secrets of ActaMed,
SBCL will provide reasonable (in light of all facts and circumstances, including
the time frame in which such disclosure is required to be made) assistance 

                                       -27-
<PAGE>

to ActaMed to take reasonable steps to assure that such Confidential 
Information or Trade Secrets of ActaMed are maintained in confidence, 
including, but not limited to, (i) requesting that the OIG treat such 
information as trade secrets, confidential information or financial 
information within the meaning of the Freedom of Information Act, 5 U.S.C. 
Section 552(b)(4), (ii) requesting of the OIG that SBCL and ActaMed be given 
prior notice of any proposed release of such information to persons or 
entities outside of the OIG; (iii) requesting that the OIG otherwise assure 
the confidentiality of the information provided by ActaMed as if such 
information was confidential information of SBCL [*] and taking other 
reasonable steps that may be requested by ActaMed and to which SBCL may, in 
its sole discretion, agree to assure that the OIG honors its confidentiality 
obligations in that section; (iv) where such information is to be provided in 
response to a request by the OIG, take reasonable steps to narrow the request 
for information from the OIG in an appropriate manner in order to limit the 
amount of information, if any, that constitute Confidential Information or 
Trade Secrets of ActaMed covered by such request; and (v) make reasonable 
efforts to permit ActaMed with the concurrence of the OIG, to disclose such 
information directly to the OIG provided that in any such case, ActaMed shall 
give SBCL a timely opportunity to review, comment upon, and approve the 
information ActaMed intends to include in such submission.  The additional 
safeguards described in subsections (i) through (v) above are designed to 
help assure the confidentiality of Confidential Information and Trade Secrets 
the disclosure of which would have a material adverse impact on ActaMed.  
These additional provisions are not intended to interfere with SBCL's ability 
to meet its disclosure obligations under the Integrity Agreement.

            Each party shall promptly notify the other in the event it receives
an inquiry, investigation, or request for information from the OIG or other
governmental agency into the matters relating to the proposed transaction.

XI.    RELATIONSHIP MANAGERS.

            ActaMed will designate a representative responsible for the SBCL 
account and who will have decision making authority for ActaMed (the "ACTAMED 
RELATIONSHIP MANAGER").  [*] will be the initial Relationship Manager for 
ActaMed. The ActaMed Relationship Manager will be a member of the Oversight 
Committee and shall attend planning meetings with SBCL, keep SBCL updated on 
national trends in EDI and Lab EDI, and consult with SBCL regarding ActaMed's 
software and Network strategy.  

            SBCL will designate a representative responsible for SBCL's 
relationship with ActaMed who will have decision making authority for SBCL 
(the "SBCL RELATIONSHIP MANAGER"). [*] will be the initial Relationship 
Manager for SBCL. The SBCL Relationship Manager will be a member of the 
Oversight Committee and will coordinate SBCL's activities with ActaMed, 
attend planning meetings with ActaMed, and keep ActaMed updated on technical 
developments with respect to [*] and Lab EDI.

            Each party will consult with the other before changing its
Relationship Manager.


[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -28-
<PAGE>

XII.   TERM AND TERMINATION.

       A.   INITIAL TERM AND RENEWALS.  This Agreement shall continue for five
(5) years from the Region One Transfer Date, unless earlier terminated as
provided herein. Unless written notice of termination is given by SBCL not less
than one hundred eighty (180) days, or by ActaMed not less than three hundred
sixty (360) days, prior to the end of the term (including any extension or
renewal of the term pursuant to this Section XII.A), the term of this Agreement
will be automatically extended for successive two (2) year periods.

       B.   TERMINATION.   A party may cause a termination of all rights and
obligations of the parties hereunder, except as provided in this Section XII
hereof, as follows:

            1.   In the event that ActaMed fails to meet any of the Key 
Performance Standards in any [*] during any period of [*] SBCL may terminate 
this Agreement immediately by giving written notice of termination to ActaMed.

            2.   SBCL may terminate this Agreement immediately following a
breach by ActaMed of its covenants set forth in Section VI hereof by giving
written notice of termination to ActaMed.

            3.   Either party may terminate this Agreement if the other party
shall fail to pay any amount when due from it hereunder (disregarding for this
purpose any unpaid amount in dispute which dispute is being pursued with
diligence) within thirty (30) days after written notice of a failure to pay is
provided by the terminating party to the nonpaying party. 

            4.   If one party breaches any material provision of this 
Agreement, which breach is not described in Sections XII.B.1-3 above (and 
which is not a breach of Performance Standards other than the Key Performance 
Standards), the nonbreaching party may terminate this Agreement by giving [*] 
written notice of termination to the breaching party.  If such breach is (in 
the reasonable estimation of the terminating party) capable of being cured 
during such period and the other party acts diligently and continuously to 
cure such breach, the termination shall be suspended during such time, 
PROVIDED THAT such breach is actually cured prior to the end of such period; 
AND PROVIDED FURTHER THAT during the period from and after the time an 
ActaMed breach is discovered, SBCL may, at its election, pay all Fixed Fees, 
Transaction Fees, Variable Fees, PIFs and other amounts otherwise due ActaMed 
hereunder into an escrow account established with a nationally recognized 
financial institution selected by SBCL, to be released to ActaMed upon the 
later of the date within such [*] period when the breach is cured or the date 
prior to exercise of the termination right provided in this Section XII.B.4 
as of which ActaMed shall have been not in breach of this Agreement for at 
least thirty (30) days.  If ActaMed proves, to SBCL's reasonable 
satisfaction, that such amounts are needed in order to cure the breach, SBCL 
will release amounts to enable ActaMed to cure the breach, in which case such 
released amounts will be used by ActaMed exclusively for purposes of curing 
such breach.


[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -29-

<PAGE>
            5.   If one party becomes insolvent, files bankruptcy, or has an
involuntary bankruptcy case filed against it which is not dismissed within
ninety (90) days, the other party may terminate this Agreement immediately by
giving written notice of termination to the breaching party.

       C.   EFFECT OF EXPIRATION. All rights and obligations of the parties
hereunder shall cease upon the expiration of this Agreement except that (i) the
obligations of the parties pursuant to Section X (relating to confidentiality),
and (ii) the exclusive use rights of SBCL pursuant to Section V (relating to
development work) shall continue in full force and effect indefinitely.  In
addition, the obligations of the parties pursuant to Section IV (relating to
compliance with Regulations) shall continue for so long as SBCL shall have Long
Term Access or Short Term Access.

       D.   EFFECT OF TERMINATION. All rights and obligations of the parties 
hereunder shall cease upon the effective date of the termination of this 
Agreement except that (i) the obligations of the parties pursuant to Section 
X (relating to confidentiality), (ii) the exclusive use rights of SBCL 
pursuant to Section V (relating to development work), and (iii) the 
obligations of ActaMed pursuant to Section XII.E hereof (relating to 
termination transition), shall continue in full force and effect 
indefinitely.  In addition, the obligations of the parties pursuant to 
Section IV (relating to compliance with Regulations) shall continue for so 
long as SBCL shall have Long Term Access or Short Term Access.  In the event 
that ActaMed has terminated this agreement for SBCL's failure to pay 
undisputed amounts due under this Agreement, ActaMed will not be required to 
perform services for SBCL or to allow SBCL access to or use of the Network 
during the termination transition period unless SBCL pays ActaMed in advance 
for such services and Network access.  Upon termination of this Agreement, 
any amount in escrow pursuant to Section IV.F or Section XII.B.4 hereof shall 
be paid to the terminating party.

       E.   Transition Upon Termination.

            1.   If this Agreement terminates as a result of a notice of 
non-renewal given by ActaMed pursuant to Section XII.A, ActaMed will provide 
[*] or, at SBCL's option, 

                 a.   SBCL may have [*] so long as ActaMed provides [*] (but 
not less than [*]), or 

                 b.   SBCL may require ActaMed [*] prior to the effective 
date of such termination, and SBCL may exercise the right to [*] as granted 
by the License Agreement.

            2.   If this Agreement terminates as a result of a notice of 
non-renewal given by SBCL pursuant to Section XII.A, ActaMed will provide [*]
and SBCL will have [*].

            3.   If SBCL terminates this Agreement pursuant to Section XII.B, 


[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -30-
<PAGE>

                 a.   ActaMed will provide [*], 

                 b.   SBCL may require ActaMed [*] within [*] after 
SBCL's notice of termination,

                 c.   SBCL may exercise the right to [*] as granted by the 
License Agreement, and

                 d.   until such time [*] by SBCL on a commercial basis, SBCL 
shall have Long Term Access.

            4.   [*] shall mean that [*] from [*] who have [*] or a version 
of [*].  For [*] SBCL will [*] on the date notice of termination is given.  
ActaMed will [*] and SBCL will [*] is rendered.  If SBCL [*] (subject to [*] 
to those provided in Section [*] hereof), ActaMed will [*].  ActaMed will have 
[*] and SBCL will [*].

            5.   [*] shall mean that ActaMed [*] the date of termination.  
For [*] SBCL will [*] the date of Termination.  ActaMed will [*] the date 
the bill is rendered.  If SBCL [*] (subject to [*] to those provided in 
Section [*] hereof), ActaMed will [*].  ActaMed will have [*] and SBCL will 
have [*].

            6.   [*] shall mean [*] that will only provide [*] and allows [*],
to provide [*] ActaLab Software at their sites.

       F.   TRANSITION UPON TERMINATION. ActaMed's [*] shall mean (i) if the 
date of termination occurs [*] the transfer to SBCL of [*] requested by SBCL 
to [*] SBCL at such time [*] and (ii) providing  SBCL, as promptly as 
practicable, with [*] used for [*] whether or not [*] to which ActaMed is 
in a position to [*] the effective date of the termination and to [*] to the 
transition.  In furtherance of and in addition to the foregoing, upon 
termination or expiration of this Agreement, the parties shall effect, and 
shall cooperate with each other in effecting, 


[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -31-
<PAGE>

the orderly and reasonable removal of ActaMed as a provider of Lab
EDI Services to Automated Providers in the manner that is least disruptive to
Automated Providers and which allows connectivity between SBCL Labs and
Automated Providers to continue uninterrupted with SBCL or a separate vendor. 
The parties shall jointly develop a removal plan which will provide a reasonable
level of support consistent with Section III hereof to transition SBCL off the
Network. Each party shall bear its own expenses in developing and implementing
the removal plan.

       G.   LICENSE AGREEMENT.  To the extent any provisions of the License
Agreement depend for their interpretation or application upon provisions of this
Agreement, such provisions shall survive termination or expiration of this
Agreement but solely for purposes of the License Agreement.

XIII.  NONSOLICITATION.

       A.   BY SBCL.  Until the occurrence of any of the events described in
Sections XIII.B, SBCL will not, directly or indirectly, solicit any ActaMed Site
to use a clinical laboratory test ordering or results reporting product other
than one serviced or distributed by or otherwise affiliated with ActaMed. 

       B.   EXCEPTIONS TO SBCL NONSOLICITATION.  The restrictions set forth in
Section XIII.A shall not apply from and after the occurrence of the following:

            1.   Any of the events described in clauses 1 through 5 of Section
XII.B shall have occurred (without regard to notice or grace periods otherwise
applicable thereto and disregarding for this purpose any termination event
arising by reason of nonpayment by SBCL of any amount not in dispute).

            2.   Any of the events described in Article X of the Assets
Purchase Agreement shall have occurred.

            3.   Notice of nonrenewal of this Agreement is given by (i) 
ActaMed pursuant to Section XII.A in which case Section XIII.A shall not 
apply for the last [*] of the then remaining term hereof, or (ii) SBCL in 
which case Section XIII.A shall not apply for the last [*] of the then 
remaining term hereof.

       C.   Noncompetition by ActaMed.  

            1.   [*] ActaMed shall not, either individually or through any 
affiliate, employee, director, officer or consultant, directly or indirectly, 
(i) [*], or (ii) compete with SBCL in the Disease Management Business.  The 
specific terms of such noncompetition shall be detailed in the separate 
writing referred to in Section VIII.D to be delivered within thirty (30) days 
after the date hereof.


[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -32-
<PAGE>

            2.   At any time prior to [*], ActaMed shall not [*] at the SBCL 
Sites transferred to ActaMed pursuant to the Purchase Agreement, including 
without limitation, to install or be instrumental in causing [*] to [*] 
located at such sites which enables the [*], or otherwise provide [*] which 
facilitate [*].

XIV.   OBLIGATION TO INDEMNIFY.

       A.   ACTAMED INDEMNITY.  Subject to Section XIV.C hereunder, ActaMed
agrees to indemnify and hold harmless each SBCL Indemnitee against and in
respect of (i) all Losses, asserted against, imposed upon or incurred by any
SBCL Indemnitee by reason of or resulting from any breach of any representation
or warranty or covenant of ActaMed contained in this Agreement, as well as from
any negligent act or omission of ActaMed; and (ii) any and all actions, suits,
claims, proceedings, investigations, demands, assessments, audits, fines,
judgments, costs and other expenses (including, without limitation, reasonable
legal fees and expenses) incident to any Loss or to the enforcement of this
Section XIV.A.

       B.   SBCL INDEMNITY.  Subject to Section XIV.C hereunder, SBCL agrees to
indemnify and hold harmless each ActaMed Indemnitee against and in respect of 
(i) all Losses, asserted against, imposed upon or incurred by any ActaMed
Indemnitee by reason of or resulting from any breach of any representation or
warranty or covenant of SBCL contained in this Agreement, as well as from any
negligent act or omission of SBCL; and (ii) any and all actions, suits, claims,
proceedings, investigations, demands, assessments, audits, fines, judgments,
costs and other expenses (including, without limitation, reasonable legal fees
and expenses) incident to any Loss or to the enforcement of this Section XIV.B. 

       C.   ALLOCATION OF RISK.   

            1.   ActaMed shall not be liable to SBCL (or to any person claiming
to have been injured by SBCL) for any lab testing error, billing error, or other
action or failure to act of SBCL, or any error or mistake not caused by ActaMed
and made by SBCL in the reporting of lab testing results to ActaMed for delivery
by the Network, and SBCL shall hold ActaMed harmless from all claims caused by
such errors or mistakes to the extent made by SBCL.

            2.   SBCL shall not be liable to ActaMed (or to any person claiming
to have been injured by ActaMed) for any error in Transmittal Information,
billing error, or other action or failure to act of ActaMed, or any error or
mistake not caused by SBCL and made by ActaMed in the transmission of test
orders and results over the Network, and ActaMed shall hold SBCL harmless from
all claims caused by such errors or mistakes to the extent made by ActaMed.

            3.   Neither party shall be liable to the other hereunder for
consequential, special, punitive or exemplary damages of any kind (including,
but not limited to, lost profits, loss of business or other similar damages)
arising out of any action or proceeding except and only to the 


[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -33-
<PAGE>

extent that such damages arise from or relate to (i) the failure of a party 
to comply with Regulations as required by this Agreement, (ii) an action in 
tort initiated by a third party against either or both of the parties hereto, 
or (iii) breach of a party's confidentiality undertakings set forth herein.

            4.   Neither party shall be liable to the other hereunder in 
connection with any action or proceeding arising from or relating to a matter 
covered by this Section XIV, or for breach of this Agreement, for an amount 
in excess of the greater of (i) [*] or (ii) the [*] prior to the date on 
which such breach occurs; PROVIDED THAT this limitation shall not apply to 
any Losses or other damages arising out of or relating to any action 
described in clauses [*].

       D.   CLAIMS NOTICE.  A Claim shall be made by any Indemnitee by delivery
of a Claims Notice to any Indemnifying Party requesting indemnification and
specifying the basis on which indemnification is sought and the amount of
asserted Losses and, in the case of a Third Party Claim, containing (by
attachment or otherwise) such other information as such Indemnitee shall have
concerning such Third Party Claim.  

       E.   PROCEDURES INVOLVING NON THIRD PARTY CLAIMS.  If the Claim involves
a matter other than a Third Party Claim, the Indemnifying Party shall raise any
objection to such Claim within a reasonable period of time by delivery of a
written notice of such objection to such Indemnitee specifying in reasonable
detail the basis for such objection.  If an objection is timely interposed by
the Indemnifying Party, the Indemnifying Party and the Indemnitee shall
cooperate in the compromise of the Claim or resolve any disagreement in
accordance with Section XV hereof.

       F.   PROCEDURES INVOLVING THIRD PARTY CLAIMS.  The obligations and
liabilities of the parties hereunder with respect to a Third Party Claim shall
be subject to the following terms and conditions:

            1.   The Indemnitee shall give the Indemnifying Party written
notice of a Third Party Claim promptly after receipt by the Indemnitee of notice
thereof, and the Indemnifying Party may undertake the defense, compromise and
settlement thereof by representatives of its own choosing reasonably acceptable
to the Indemnitee.  The failure of the Indemnitee to notify the Indemnifying
Party of such claim shall not relieve the Indemnifying Party of any liability
that they may have with respect to such claim except to the extent the
Indemnifying Party demonstrates that the defense of such claim is prejudiced by
such failure.  The assumption of the defense, compromise and settlement of any
such Third Party Claim by the Indemnifying Party shall be an acknowledgment of
the obligation of the Indemnifying Party to indemnify the Indemnitee with
respect to such claim hereunder.  If the Indemnitee desires to participate in,
but not control, any such defense, compromise and settlement, it may do so at
its sole cost and expense.  If, however, the Indemnifying Party fails or refuses
to undertake the defense of such Third Party Claim within ten (10) days after
written notice of such claim has been given to the Indemnifying Party by the
Indemnitee, the Indemnitee shall have the right to undertake the defense,
compromise and settlement 


[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -34-
<PAGE>

of such claim with counsel of its own choosing. In the circumstances 
described in the preceding sentence, the Indemnitee shall, promptly upon its 
assumption of the defense of such claim, make a Claim as specified in 
Sections XIV.A and XIV.B which shall be deemed a Claim that is not a Third 
Party Claim for the purposes of the procedures set forth herein.

            2.   If, in the reasonable opinion of the Indemnitee, any Third
Party Claim or the litigation or resolution thereof involves an issue or matter
which could have a material adverse effect on the business, operations, assets,
properties or prospects of the Indemnitee, the Indemnitee shall have the right
to control the defense, compromise and settlement of such Third Party Claim
undertaken by the Indemnifying Party, and the reasonable costs and expenses of
the Indemnitee in connection therewith shall be included as part of the
indemnification obligations of the Indemnifying Party hereunder.  If the
Indemnitee shall elect to exercise such right, the Indemnifying Party shall have
the right to participate in, but not control, the defense, compromise and
settlement of such Third Party Claim at its sole cost and expense.

            3.   No settlement of a Third Party Claim involving the asserted
liability of the Indemnifying Party under this Article shall be made without the
prior written consent by or on behalf of the Indemnifying Party, which consent
shall not be unreasonably withheld or delayed.  If the Indemnifying Party
assumes the defense of such a Third Party Claim, (1) no compromise or settlement
thereof may be effected by the Indemnifying Party without the Indemnitee's
consent unless (a) there is no finding or admission of any violation of law or
any violation of the rights of any person and no effect on any other claim that
may be made against the Indemnitee (b) the sole relief provided is monetary
damages that are paid in full by the Indemnifying Party and (c) the compromise
or settlement includes, as an unconditional term thereof, the giving by the
claimant or the plaintiff to the Indemnitee of a release, in form and substance
satisfactory to the Indemnitee, from all liability in respect of such Third
Party Claim, and (2) the Indemnitee shall have no liability with respect to any
compromise or settlement thereof effected without its consent.

       G.   NO RELEASE FOR FRAUD.  Nothing contained in this Agreement shall
relieve or limit the liability of a party or any officer or director of such
party from any Liability arising out of or resulting from common law fraud or
intentional misrepresentation in connection with the transactions contemplated
by this Agreement or in connection with the delivery of this Agreement.  Each
ActaMed Indemnitee or SBCL Indemnitee, as the case may be, shall have a right to
indemnification for any Loss incurred as the result of any common law fraud or
intentional misrepresentation by SBCL or ActaMed, respectively, or any officer
or director thereof.

       H.   Payment.

            1.   If any party is required to make any payment under this
Section XIV, such party shall promptly pay the Indemnified Party the amount so
determined.  If there is a dispute as to the amount or manner of determination
of any indemnity obligation owed under this Section XIV, the Indemnifying Party
shall nevertheless pay when due such portion, if any, of the obligation as shall
not be subject to dispute.  The difference, if any, between the amount of the
obligation 

                                       -35-
<PAGE>

ultimately determined as properly payable under this Section XIV and
the portion, if any, theretofore paid shall bear interest as set forth in
Section XIV.F.3.

            2.   Any items as to which an Indemnified Party is entitled to
payment under this Article may be paid by setoff against amounts payable to the
Indemnifying Party to the extent that such amounts are sufficient to pay such
items.

            3.   If all or part of any indemnification obligation under this
Agreement is not paid when due, then the Indemnifying Party shall pay the
Indemnified Party interest on the unpaid principal amount of the obligation from
the date the amount became due until payment in full, at the per annum rate of
interest announced from time to time by NationsBank South, N.A., to be its
"prime rate."

XV.    DISPUTE RESOLUTION; ARBITRATION.

       A.   GENERAL.  Except as otherwise provided in Section VI of this
Agreement, disputes between ActaMed and SBCL relating to the interpretation or
application of this provisions of this Agreement shall be resolved in accordance
with this Section XV.

       B.   INFORMAL DISPUTE RESOLUTION. Any dispute between the parties
arising out of or with respect to this Agreement, either with respect to the
interpretation of any provision of this Agreement or with respect to the
performance by ActaMed or SBCL, shall be resolved as provided in this Article.

            1.   Prior to the initiation of formal dispute resolution
procedures, the parties shall first attempt to resolve their dispute informally,
as follows:

                 a.   The Representatives for each party shall meet for the
purpose of endeavoring to resolve such dispute.  They shall meet as often as the
parties reasonably deem necessary in order to gather and furnish to the other
all information with respect to the matter in issue which the parties believe to
be appropriate and germane in connection with its resolution.  The
Representatives shall discuss the problem and negotiate in good faith in an
effort to resolve the dispute without the necessity of any formal proceeding. 
During the course of negotiations, all reasonable requests made by one party to
another for nonprivileged information, reasonably related to this Agreement,
shall be honored in order that each of the parties may be fully advised of the
other's position.

                 b.   If, within fifteen (15) days after a matter has been
identified for resolution pursuant to this Section XV, either of the
Representatives concludes in good faith that amicable resolution through
continued negotiation in this forum does not appear likely, the matter will be
escalated by formal written notification to the SBCL President and the ActaMed
President.  The parties will use their respective best efforts to cause the SBCL
President and the ActaMed President to meet to attempt to resolve the dispute.

                                       -36-
<PAGE>

                 c.   Formal proceedings for the resolution of a dispute may
not be commenced until the earlier of:  (i) the date on which the SBCL President
and the ActaMed President conclude in good faith that amicable resolution
through continued negotiation of the matter does not appear likely; or (ii)
thirty (30) days after the dispute has been referred to the SBCL President and
the ActaMed President.

            2.   The provisions of this Section XV shall not be construed to
prevent a party from instituting, and a party is authorized to institute, formal
proceedings earlier to avoid the expiration of any applicable limitations
period.

       C.   ARBITRATION.  If the parties are unable to resolve any controversy
arising under this Agreement as contemplated by Section XV.A and if such
controversy is not subject to Section XIV or Section XV.D, then such controversy
shall be submitted to mandatory and binding arbitration at the election of
either Party (the "DISPUTING PARTY") pursuant to the following conditions:

            1.   The Disputing Party shall notify the AAA and the other Party
in writing describing in reasonable detail the nature of the dispute (the
"DISPUTE NOTICE").  The parties shall each select a neutral arbitrator in
accordance with the rules of AAA and the two (2) arbitrators selected shall
select a third neutral arbitrator.  The three (3) arbitrators so selected are
herein referred to as the "PANEL."

            2.   The Panel shall allow reasonable discovery as permitted by the
Federal Rules of Civil Procedure, to the extent consistent with the purpose of
the arbitration.  The Panel shall have no power or authority to amend or
disregard any provision of this Section XV.  The arbitration hearing shall be
commenced promptly and conducted expeditiously, with each of ActaMed and SBCL
being allocated one-half of the time for the presentation of its case.  Unless
otherwise agreed to by the parties, an arbitration hearing shall be conducted on
consecutive days.

            3.   Should any arbitrator refuse or be unable to proceed with
arbitration proceedings as called for by this Section, such arbitrator shall be
replaced by an arbitrator selected in accordance with the rules of the AAA and
consistent with this Section XV.

            4.   The Panel rendering judgment upon disputes between parties as
provided in this Section XV shall, after reaching judgment and award, prepare
and distribute to the parties a writing describing the findings of fact and
conclusions of law relevant to such judgment and award and containing an opinion
setting forth the reasons for the giving or denial of any award.  The award of
the arbitrator shall be final and binding on the parties, and judgment thereon
may be entered in a court of competent jurisdiction.

            5.   Arbitration hearings hereunder shall be held in Washington
D.C. or other mutually agreeable location.

            6.   The Panel shall be instructed that time is of the essence in
the arbitration proceeding.  The Panel shall render its judgment or award within
fifteen (15) days following the 

                                       -37-
<PAGE>

conclusion of the hearing.  Recognizing the express desire of the parties for 
an expeditious means of dispute resolution, the arbitrator shall limit or 
allow the parties to expand the scope of discovery as may be reasonable under 
the circumstances.

       D.   LITIGATION.  In the event of a breach of the confidentiality
obligations set forth in this Agreement, or in the event a party makes a good
faith determination that a breach of the terms of this Agreement by the other
party is such that the damages to such party resulting from the breach will be
so immediate, so large or severe, and so incapable of adequate redress after the
fact that a temporary restraining order or other immediate injunctive relief is
a necessary remedy, then such party may file a pleading with a court seeking
immediate injunctive relief.  If a party files a pleading with a court seeking
immediate injunctive relief and this pleading is challenged by the other party
and the injunctive relief sought is not awarded in substantial part (or in the
event of a temporary restraining order is vacated upon challenge by the other
party), the party filing the pleading seeking immediate injunctive relief shall
pay all of the costs and attorneys' fees of the party successfully challenging
the pleading.

            1.   ActaMed and SBCL each consent to venue in Philadelphia,
Pennsylvania and to the nonexclusive jurisdiction of competent Pennsylvania
state courts or federal courts located in Philadelphia for all litigation which
may be brought, subject to the requirement for arbitration hereunder, with
respect to the terms of, and the transactions and relationships contemplated by,
this Agreement. 

XVI.   MISCELLANEOUS.

       A.   PUBLICITY.  Each party hereto agrees that neither it, nor or any of
its representatives, shall make any public announcement with respect to this
Agreement or the transactions contemplated hereby without the prior consent of
the other party hereto unless required by law or judicial process, in which case
notification shall be given to the other party hereto prior to such disclosure
and the content of such disclosure approved by such other party, which approval
shall not be unreasonably withheld or delayed.  Notwithstanding the foregoing,
ActaMed agrees that nothing in this Section XVI.A shall prohibit SBCL from
disclosing any information SBCL is permitted to disclose under Section X.D.

       B.   ENTIRE AGREEMENT.  This Agreement, including the Exhibits to it,
constitutes the entire understanding between the parties and supersedes all
proposals, communications and agreements between the parties relating to its
subject matter.  No amendment, change, or waiver of any provision of this
Agreement will be binding unless in writing and signed by both parties.

       C.   GOVERNING LAW.  This Agreement will be governed by and construed in
accordance with the laws of the State of Georgia applicable to contracts made
and performed therein.

       D.   ASSIGNMENTS.  Neither party may assign this Agreement without the
prior, written consent of the other party, which shall not be unreasonably
withheld; PROVIDED, HOWEVER, that SBCL may assign its rights and obligations
hereunder without approval of ActaMed to any of its affiliates, 

                                       -38-
<PAGE>

or an acquiror of substantially all of its assets; PROVIDED FURTHER that 
ActaMed may assign its rights and obligations under this Agreement without 
the approval of SBCL to any person that acquires all or substantially all of 
the business or assets of ActaMed related to the ActaLab Software and the 
Network, if such person (or any affiliate of such person) is not engaged in 
the business of providing laboratory testing services.  Any attempted 
assignment without such consent shall be void. If the parties cannot agree 
upon whether a company competes with SBCL for lab testing, the parties shall 
resolve the dispute pursuant to Section XV.  Any assignment with consent does 
not release the assigning party from any of its obligations under this 
Agreement unless the consent so states.

       E.   NOTICES.  Any notices relating to this Agreement shall be in
writing and will be sent by certified United States mail, postage prepaid,
return receipt requested, or by facsimile transmission or overnight courier
service, addressed to the party at the address set forth below, or at such
different address as a party has advised to the other party in writing and shall
be deemed given and received when actually received:

If to SBCL:

       SmithKline Beecham Clinical Laboratories, Inc.
       1201 South Collegeville Road                   
       Collegeville, Pennsylvania  19426
       Attention:  John B. Okkerse, Jr., Ph.D., President
       Telephone:  [*]
       Telecopy:  [*]

With a copy to: 

       SmithKline Beecham Corporation
       One Franklin Plaza
       16th and Race Streets
       Philadelphia, PA  19103
       Attention: General Counsel-U.S.
       Telephone:  [*]
       Telecopy:  [*]

If to ActaMed:

       ActaMed Corporation
       Suite 600
       7000 Central Parkway
       Atlanta, Georgia 30328
       Attention: Chief Financial Officer
       Telephone: (770)352-1600
       Telecopy: (770)352-1815



[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -39-
<PAGE>

with a copy to:

       Alston & Bird
       One Atlantic Center
       1201 West Peachtree Street
       Atlanta, Georgia  30309-3424
       Attention: John C. Weitnauer, Esquire
       Telephone:  (404) 881-7780
       Telecopy Number:  (404) 881-7777

       F.   SEVERABILITY.  In the event one or more of the provisions of this
Agreement are found to be invalid, illegal or unenforceable by a court with
jurisdiction, the remaining provisions shall continue in full force and effect.

       G.   FORCE MAJEURE.  The obligations of the parties under this Agreement
(other than the obligation to make payments) shall be suspended to the extent a
party is hindered or prevented from complying therewith because of labor
disturbances (including strikes or lockouts), war, acts of God, fires, storms,
accidents, governmental regulations, failure of vendors or suppliers or any
other cause whatsoever beyond a party's control.  For so long as such
circumstances prevail, the party whose performance is delayed or hindered shall
continue to use all commercially reasonable efforts to recommence performance
without delay.

       H.   COUNTERPARTS.  This Agreement may be executed in one or more
counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument.

            THIS AGREEMENT CONTAINS A BINDING ARBITRATION PROVISION THAT MAY BE
ENFORCED BY THE PARTIES.

                                       -40-
<PAGE>


     IN WITNESS WHEREOF, the parties have executed this Services Agreement as 
of the date set forth above.

                                ACTAMED CORPORATION


            
                                By:     /s/
                                   ---------------------------------------

                                Its:    President
                                    --------------------------------------

            
                                SMITHKLINE BEECHAM CLINICAL LABORATORIES, INC. 



                                By:     /s/
                                   ---------------------------------------

                                Its:    President
                                    --------------------------------------


<PAGE>

                                      EXHIBITS
<TABLE>
<S>                   <C>
Exhibit A             -- Definitions-

Exhibit II.B.2(a)     -- Automated Provider Contract Amendment Provisions*

Exhibit II.B.2(b)     -- Automated Provider New Contract*

Exhibit III.B.7       -- Reports-

Exhibit III.C-1       -- Network Standards-

Exhibit III.C-2       -- Customer Support Standards-

Exhibit IV.G          -- Average Revenue/Requisition & Monthly 
                         Average Number of Requisitions*

Exhibit V.A.          -- Required Maintenance

Exhibit V.B.          -- Year 2000 Warranties

Exhibit VII.C-1       -- Current Connectivity Arrangements**

Exhibit VII.C-2       -- Exclusions to Preferred Vendor Status
</TABLE>

*  TO BE DELIVERED BY JANUARY 31, 1998.

** TO BE DELIVERED BY JANUARY 15, 1998.

<PAGE>

                                     EXHIBIT A
                                          
                                    DEFINITIONS


            "AAA" means the American Arbitration Association.

            "ActaLab Software" means the ActaLab Software as defined under the
License Agreement.

            [*] has the meaning set forth in Section XII.E.6 of the Services 
Agreement. 

            "ActaMed" means ActaMed Corporation, a Georgia corporation.

            "ActaMed Gateway shall have the meaning set forth in Section
II.A.1.

            "ActaMed Indemnitee" means ActaMed and its directors, officers,
employees,  affiliates and permitted assigns.

            "ActaMed Network" means the EDI system and network for electronic
Transmissions, which includes the Network Software and ActaMed's gateway and
hardware and computer systems needed to operate that software.

            "ActaMed President" shall mean the President of ActaMed, presently
Michael K. Hoover, or should ActaMed be restructured in any manner, the officer
of ActaMed having top authority over ActaMed's operations.

            "ActaMed Relationship Manager" shall have the meaning set forth in
Section XI.

            "ActaMed Site" means an Automated Provider utilizing the Network
for Lab EDI Services located in a transferred Region that was an SBCL Site on
the Transfer Date of the Region or is a New Site or [*].

            "Agreed Services" means all services to be rendered by ActaMed
under this Services Agreement, including without limitation Lab EDI Services.

            "Anniversary" shall mean the anniversary date of the Region One
Transfer Date.

            "Audit Rights" means the right to, or to have representatives, 

                      (1)  examine all books of account, records, reports and
other papers except to the extent that such action would, in the reasonable
opinion of counsel, constitute a waiver of the attorney/client privilege or
violate obligations of confidentiality to third parties,

[*] CONFIDENTIAL TREATMENT REQUESTED

                                      A-1
<PAGE>

                      (2)  make copies and take extracts from any thereof,
except for information which is subject to a written confidentiality agreement
with a third party,

                      (3)  discuss the affairs, finances and accounts of the
party being audited with such party's officers and independent certified public
accountants (and by this provision such audited party hereby authorizes said
accountants to discuss with the auditing party and its representatives, the
finances and accounts of such entity) and

                      (4)  visit and inspect, at reasonable times and on
reasonable notice during normal business hours, the properties of the other
party;

PROVIDED THAT, the foregoing audit rights are in addition to any rights of a
party under the Georgia Business Corporation Code in the case of ActaMed, or the
Delaware General Corporation Law in the case of SBCL, and shall in no way limit
such rights; and 

PROVIDED FURTHER THAT, the expenses incurred in connection with any such
inspection shall be for the account of the auditing party, except that all
reasonable expenses incurred by the audited party, or any of its officers,
employees, agents or independent certified public accountants, shall be
expenses payable by the audited party and shall not be expenses of the auditing
party. 

            "Automated Provider" means a Provider [*] who or which, on or
after the Transfer Date of the Region in which the Provider [*] is located,
uses the Network to send clinical laboratory test orders to an SBCL Lab or to
receive test result reports from an SBCL Lab.

            "Changes" means any improvements, changes or additions to
application software and documentation that improve existing functions, add new
functions, or improve performance through changes in the software or system
design or coding.

            "Claim" means any claim for indemnification under Section XIV of
the Services Agreement.

            "Claims Notice" means a written notice of an indemnification claim
delivered pursuant to Section XIV of the Services Agreement.

            "Confidential Information" means information that is (1)
confidential to the business of a party, including without limitation, data
regarding the extent of the Agreed Services provided hereunder to, or
Transaction Fees, Fixed Fees or PIFs paid hereunder by, SBCL, (2) is designated
and identified as such by such party, and (3) is not a Trade Secret; provided,
however, that Confidential Information does not include any information which is
or becomes generally known to the public without any breach by the Receiving
Party of its duties to the Disclosing Party.  Assuming that the foregoing
criteria are met, Confidential Information also includes information which has
been disclosed to a Receiving Party by another person and which the Receiving
Party is obligated to treat as confidential.

[*] CONFIDENTIAL TREATMENT REQUESTED

                                       A-2
<PAGE>

            "Customer Support Standards" has the meaning set forth in Section
III.C of the Services Agreement.

            "Development Agreement" means the Development Agreement between
SBCL and ActaMed dated October 31, 1997 for the initial development of the
ActaLab Software.

            "Disclosing Party" has the meaning set forth in Section X.C of the
Services Agreement.

            "Disease Management Business" shall have the meaning set forth in
Section VIII.D.

            "Dispute Notice" means a written notice by one party hereto
notifying the other of the existence of a dispute, which notice shall delineate
the disputed items and the factual basis for the dispute.

            "Disputing Party" has the meaning given in Section XV.B of the
Services Agreement.

            "EDI" means electronic data interchange.

            "Exclusive Developments" has the meaning set forth in Section
V.E.1.a of the Services Agreement.

            "First Variable Fee" has the meaning set forth in Section IV.C.1 of
the Services Agreement.

            "Fixed Fee" means the amounts payable by SBCL pursuant to Section
IV.A of the Services Agreement.

            "Fixed Fee Sites" has the meaning set forth in Section IV.G of the
Services Agreement.

            "FTE" means "full time equivalent," i.e., the equivalent number of
work hours that would be worked by one person working on a full time basis,
treating eight (8) hours worked per day as a full work day. 

            "Indemnifying Party" means the Party obligated to provide
indemnification pursuant to Section XIV of the Services Agreement.

            "Indemnitee" means an ActaMed Indemnitee or an SBCL Indemnitee.

            "Integrity Agreement" means SBCL's Corporate Integrity Agreement
with the OIG.

            "Intellectual Property" means copyrights, trademarks, service
marks, trade names, patents, applications therefor, technology rights and
licenses, computer software (including, without limitation, any source or object
codes therefor or documentation relating thereto), computer software licenses,
trade secrets, franchises, know-how, inventions and intellectual property
rights.

                                      A-3
<PAGE>

            "Key Performance Standards" shall mean the Performance Standards
under the headings of [*]

            "Lab EDI Services " means electronic connectivity services enabling
an Automated Provider to send Transmittal Information electronically to an SBCL
Lab and/or to receive electronically Transmittal Information from an SBCL Lab
utilizing the Network.

            "Liability" means any direct or indirect liability, indebtedness,
obligation, expense, claim, deficiency, guaranty or endorsement of or by any
person (other than endorsements of notes, bills and checks presented to banks
for collection or deposit in the ordinary course of business) of any type,
whether accrued, absolute, contingent, matured, unmatured or other.

            "License Agreement" means the License Agreement between SBCL and
ActaMed dated the date of the Services Agreement and described in the Preamble
to the Services Agreement.

            "Licensed Materials" means the software licensed pursuant to the
License Agreement.

            [*] has the meaning set forth in Section XII.E.4 of the Services 
Agreement.

            "Losses" means any and all demands, claims, actions or causes of
action, assessments, losses, diminution in value, damages (including special and
consequential damages), liabilities, costs, and expenses, including without
limitation, interest, penalties, cost of investigation and defense, and
reasonable attorneys' and other professional fees and expenses.

            [*] has the meaning set forth in Section XII.F of the Services 
Agreement.

            "Network" means the SCAN Network and/or the ActaMed Network.

            "Network Software" means ActaMed's personal computer version of the
ProviderLink and ActaLink presentation and network software programs, under
whatever name marketed, and the SCAN Software and the ActaLab Software, and all
Changes to them, which are licensed to Automated Providers and which allow
access to the Network for the transmission of laboratory test order entries and
reception of test result information, or other software program for use by
ActaMed in the transmission of test order entries and reception of test result
information which is licensed to Automated Providers.

            "Network Standards" shall have the meaning set forth in Section
III.C of the Services Agreement.

            "New Business Plan" shall mean the ActaMed business plan delivered
pursuant to Section 5.1.8 of the Purchase Agreement.

[*] CONFIDENTIAL TREATMENT REQUESTED

                                      A-4
<PAGE>

            "New Site" shall mean an ActaMed Site added to the Network on or
after the Transfer Date of the Region in which the ActaMed Site is located and
which is not a Fixed Fee Site.

            "Office Space" has the meaning set forth in Section II.B.5 of the
Services Agreement.

            "OIG" means the Office of Inspector General, U.S. Department of
Health and Human Services.

            "Other Lab" means a commercial laboratory other than an SBCL Lab.

            "Oversight Committee" has the meaning set forth in Section III.A of
the Services Agreement.

            "Panel" has the meaning given it in Section XV.B of the Services
Agreement.

            "PC System" means the personal computer, modem, bar code readers,
bar code label printers, requisition and results printers and other hardware
peripherals required for a Provider to become an Automated Provider.

            [*] means an SBCL [*] or other [*].

            "Performance Standards" shall have the meaning set forth in Section
III.C of the Services Agreement.

            "PIF Amount" has the meaning given it in Section IV.C.2 of the
Services Agreement.

            "PIF Number" has the meaning given it in Section III.B.3 of the
Services Agreement.

            "PIF Sites" has the meaning given it in Section III.B.3 of the
Services Agreement.

            [*] or "PIF" has the meaning given it in Section IV.M.1 of the 
Services Agreement.

            "Provider" means a physician, clinic, hospital, or other provider
of clinical health care services other than [*].

            "Purchase Agreement" means the Asset Purchase Agreement between
ActaMed and SBCL dated the date of the Services Agreement and described in the
Preamble to the Services Agreement.

            "Receiving Party" has the meaning given it in Section X.C of the
Services Agreement.

            "Region" means any one of Region One, Region Two, Region Three, or
Region Four.

[*] CONFIDENTIAL TREATMENT REQUESTED

                                      A-5
<PAGE>

            "Region Four" means the Region described on Schedule 2.2(d) to the
Purchase Agreement.

            "Region Four Transfer Date" has the meaning given in Section 2.3.4
of the Purchase Agreement.

            "Region One" means the Region described on Schedule 2.2(a) to the
Purchase Agreement.

            "Region One Transfer Date" means the date on which Region One is
transferred to ActaMed pursuant to the Purchase Agreement.

            "Region Three" means the Region described on Schedule 2.2(c) to the
Assets Purchase Agreement.

            "Region Three Transfer Date" has the meaning given in Section 2.3.3
of the Purchase Agreement.

            "Region Two" means the Region described on Schedule 2.2(b) to the
Purchase Agreement.

            "Region Two Transfer Date" has the meaning given in Section 2.3.2
of the Purchase Agreement.

            "Regulation" means any statute, law, ordinance, regulation,
requirement, order or rule of any federal, state, local government or other
governmental agency or body or of any other type of regulatory body, or any
governmental or administrative interpretation of any thereof, including, without
limitation, (i) those covering health, safety, environmental, energy,
transportation, bribery, record keeping, zoning, antidiscrimination, antitrust,
wage and hour, and price and wage control matters, (ii) requirements imposed by
any governmental or regulatory body which must be satisfied to qualify for
Medicare reimbursements, and (iii) any and all federal, state and local health
care laws relating to or covering the methods and ways in which Lab EDI Services
and other related or incidental services or benefits, if any, are provided to
the Automated Providers, including, but not limited to, the Stark law (42 U.S.C.
Section 1395nn) and the Clinical Laboratory Improvements Act of 1988, as
amended.

            [*] has the meaning set forth in Section IV.G of the Services 
Agreement.

            [*] has the meaning set forth in Section IV.G.2 of the Services 
Agreement.

            "Representatives" means the ActaMed Relationship Manager and the
SBCL Relationship Manager.

[*] CONFIDENTIAL TREATMENT REQUESTED

                                      A-6
<PAGE>

            "Requisition" shall mean an electronically transmitted clinical 
laboratory test order from an Automated Provider to SBCL which is entered 
utilizing SCAN Software, the ActaLab Software or other program for electronic 
lab order entry and results reporting and utilizing the Network, for one or 
more clinical laboratory tests for a single patient transmitted 
electronically at one time and the corresponding test results delivered 
electronically to an Automated Provider from SBCL at one or more times.  The 
term "Requisition" shall include patient eligibility for third party payor 
benefits or reimbursement or claim status checking related to such order and 
available to ActaMed.

            "SBCL" means SmithKline Beecham Clinical Laboratories, Inc., a
Delaware corporation.

            "SBCL Access" has the meaning set forth in Section X.B.2 of the
Services Agreement.

            "SBCL Indemnitee" means SBCL and its directors, officers,
employees, affiliates and permitted assigns.

            "SBCL Lab" means any location at which SBCL or its affiliates
provide, or may in the future provide, clinical laboratory testing services,
regardless of the computer systems or software, if any, used by such lab for lab
order entry and results reporting.

            "SBCL President" shall mean the President of SBCL, presently
John B. Okkerse, Jr., Ph.D., or should SBCL be restructured in any manner, the
officer of SBCL having top authority over SBCL's operations.

            "SBCL Relationship Manager" has the meaning set forth in Section XI
of the Services Agreement.

            "SBCL Site" means an Automated Provider utilizing the SCAN Network
for Lab EDI Services on the Transfer Date of the Region in which such Automated
Provider is located.

            "SCAN Assets" has the meaning set forth in the Purchase Agreement.

            "SCAN Developments" has the meaning set forth in the License
Agreement.

            "SCAN Network" means the SCAN Software and SBCL's gateway and 
hardware and computer systems needed to operate the SCAN Software, excluding 
[*] which enables Providers or [*] to place laboratory test orders 
electronically to an SBCL Lab and/or to receive test result reports 
electronically from an SBCL Lab.

            "SCAN PSC" means a PSC which utilizes the Network to enter
laboratory test orders electronically and/or to receive test result reports
electronically.

[*] CONFIDENTIAL TREATMENT REQUESTED

                                       A-7
<PAGE>

            "SCAN Site" means either an SBCL Site or an ActaMed Site that has
installed and is using SCAN Software for Lab EDI Services.

            "SCAN Software" means the SBCL SCAN-TM- software licensed to
ActaMed pursuant to the License Agreement, and all Changes thereto after the
date hereof.

            "Second Variable Fee" has the meaning set forth in Section IV.C.2
of the Services Agreement.

            [*] has the meaning set forth in Section XII.E.5 of the Services 
Agreement.

            "SOP" means a standard operating procedure.

            "Termination Transition"  has the meaning given it in Section XII.D
of the Services Agreement.

            "Third Party Claim" means any claim, suit or proceeding (including,
without limitation, a binding arbitration or an audit by any taxing authority)
that is instituted against an Indemnitee by a person or entity other than an
Indemnitor and which, if prosecuted successful, would result in a Loss for which
such Indemnitee is entitled to indemnification hereunder.

            "TopLab" means SBCL's proprietary laboratory systems which
facilitate SBCL's internal automated laboratory test processing and reporting,
including but not limited to SBCL's Total Order Processing Laboratory system.

            "Trade Secrets" means information related to the Disclosing Party
(1) which derives economic value, actual or potential, from not being generally
known to or readily ascertainable by other persons who can obtain economic value
from its disclosure or use, and (2) which is the subject of efforts by the
Disclosing Party that are reasonable under the circumstances to maintain its
secrecy.  Without limitation, for ActaMed, ProviderLink and the ActaLab Software
are Trade Secrets, and for SBCL, the SBCL Software, SCAN Developments and
TopLab are Trade Secrets.

            "Transaction Fee Amount" has the meaning set forth in Section
IV.C.1 of the Services Agreement.

            "Transaction Fees" has the meaning set forth in Section IV.B of the
Services Agreement.

            "Transfer Date" shall mean any one of, and "Transfer Dates" shall
mean more than one of the Region One Transfer Date, the Region Two Transfer
Date, the Region Three Transfer Date, and the Region Four Transfer Date.

            "Transferred Employees" shall have the meaning given such term in
the Purchase Agreement.

[*] CONFIDENTIAL TREATMENT REQUESTED

                                       A-8
<PAGE>

            "Transmission" means the electronic transmittal over the Network of
Transmittal Information in an approved document format.

            "Transmittal Information" means information which an Automated
Provider gives ActaMed for communication to SBCL over the Network, or which SBCL
gives ActaMed for communication to an Automated Provider over the Network,
including all copies of same, and including without limitation, data relating to
laboratory records, clinical data, encounter data, test information, test codes
and provider identification numbers (other than UPINs)

            "Variable Fees" has the meaning given it in Section IV.C.2 of the
Services Agreement.


                                       A-9

<PAGE>




                                 EXHIBIT II.B.2(a)
                                          
               LAB EDI SERVICE AGREEMENT AMENDMENT PROVISIONS
                                          
                                          















                                III.B.2-1

<PAGE>





                                  EXHIBIT II.B.2(b)

                              LAB EDI SERVICE AGREEMENT













                                III.B.7-1

<PAGE>

                                EXHIBIT III.B.7

                                 REPORTS


       A.   REPORTS ACTAMED WILL PROVIDE TO SBCL

            The following reports will be provided to SBCL by ActaMed on the
indicated schedule.

            1.   BILLING REPORTS

                 a.   [*] SUMMARY REPORTS (POST-ACTAMED GATEWAY):

                      (1)  Fixed Fee Sites

                           (a)  Total Sites

                           (b)  Total Requisitions

                           (c)  Average Requisitions per Site

                      (2)  Transaction Fee Sites

                           (a)  Total Sites

                           (b)  Total Requisitions

                           (c)  Average Requisitions per Site

                      (3)  PIF Sites

                           (a)  Total Sites charged for the [*] that [*] 
                                (with appropriate supporting detail)

                      (4)  Label Printer Fees

                           (a)  Total Sites charged for the Label printer
                                equipment fee (with appropriate supporting
                                detail)

                 b.   [*] DETAILED FEES:

                      (1)  List of Fixed Fee sites by lab

                      (2)  List of Transaction Fee sites by lab


                                III.B.7-1

[*] CONFIDENTIAL TREATMENT REQUESTED

<PAGE>

                      (3)  List of PIF Sites by lab

                      (4)  List of sites with bar code printer paid by SBCL by
                           lab

                 c.   CUSTOM DEVELOPMENT:

                      (1)  Monthly itemization and accounting for the hours
                           worked for any projects active under a Custom
                           Development Fee, and a project status report on each
                           item worked

                 d.   MONTHLY EXPENSE BILLINGS:

                      (1)  Personnel in non-transferred regions, with
                           supporting detail

            2.   PERFORMANCE REPORTS

                 a.   All reports necessary to verify and measure the
                      Performance Standards, including, but not limited to, the
                      following:  (i) [*] help desk REPORTS, as set forth
                      in Exhibit III.C-2 - Customer Support Standards showing
                      performance statistics against the Performance Standards
                      and the number of calls received by type of problem
                      (detail problem coded); (ii) [*] network reports, as
                      set forth in Exhibit III.C-1 - Network Standards; (iii)
                      Performance Metrics reports against the Performance
                      Standards described in Exhibit III.C-1 & 2, including
                      comparison of actuals to standard for current month and
                      rolling prior 12 months.

                 b.   Transfer BENCHMARK reports, as set forth in Exhibit
                      2.3.1(a) of the Assets Purchase Agreement.

                 c.   Monthly Gateway reports (format to be mutually determined
                      once the ActaMed GATEWAY is active, but intended to be
                      generally similar to the SBCL November 1997 Gateway
                      Report).

                 d.   As APPROPRIATE from time to time, in light of
                      technological advances, market conditions or industry
                      standards or other facts and circumstances, a report
                      describing ActaMed's plans to increase the performance
                      and capabilities of the Network and to improve Customer
                      Service beyond the minimum levels specified in Exhibits
                      III.C-1 and III.C-2.

                 e.   Monthly report of SBCL clients that have deinstalled
                      (discontinued to use) Lab EDI Services.

[*] CONFIDENTIAL TREATMENT REQUESTED

                                III.B.7-2

<PAGE>

                 f.   An ongoing data base (to be created, kept current and
                      available for reporting) report of the current list of
                      clients approved for installation including date
                      received, Lab, Client ID, Client demographics and
                      expected date of installation.

            3.   SAS 70 REPORT

                 ActaMed will provide a report produced in accordance with
standards established by the American Institute of Certified Public Accountants'
Statement on Auditing Standards Number 70:  Reports on the Processing of
Transactions by Service Organizations.  ActaMed shall submit the first such
report to SBCL by the end of 1998.

       B.   REPORTS SBCL WILL PROVIDE TO ACTAMED

            1.   BILLING REPORTS

                 A.   SBCL WILL MAKE AVAILABLE TO ACTAMED ACCESS TO DATA
                      RELATING TO:

                      (1)  Fixed Fee Sites

                      (2)  Total Sites (list of Fixed Fee Sites by Lab active
                           that month)

                      (3)  List of Transaction Fee sites by Lab

                 B.   FOLLOWING ACTAMED GATEWAY, MONTHLY EXPENSE BILLINGS (with
                      appropriate SUPPORTING detail):

                      (1)  Gateway 1-800 charges to ActaMed

                      (2)  Non-transferred local line charges

                      (3)  Service Fees for ongoing support of ActaMed Gateway,
                           if any

                      (4)  Service Fees for SBCL Gateway Services for
                           Transferred Sites, if any

            2.   PERFORMANCE REPORTS

                 a.   Prior to the ActaMed Gateway, SBCL will continue to
                      provide ActaMed with copies of its standard monthly
                      Gateway report.

                 b.   Timely reports on changes in SBCL that affect ActaMed and
                      its PERFORMANCE hereunder, as set forth in Section IX.

                                III.B.7-3

<PAGE>

            3.   STRATEGIC INFORMATION

                 Quarterly information on major trends within SBCL as
appropriate that are relevant to ActaMed and its performance hereunder, such as
new customers, lost customers, trends in lab requisition and result volumes,
compliance related issues, etc.





                                III.B.7-4

<PAGE>

                                  EXHIBIT III.C-1
                                          
                             NETWORK SUPPORT STANDARDS


ACTAMED NETWORK AVAILABILITY

The ActaMed Network will be available 24 hours a day, 7 days a week with the
exception of Planned Down Hours.  "Planned Down Hours" means that time which is
reasonably required for maintenance and problem resolution as reasonably
required and notwithstanding any other provision herein shall only occur during
the hours of [*] or on Federally recognized holidays.


HARDWARE AND MODEM AVAILABILITY

For each month, ActaMed shall maintain an "Availability Percentage" of at 
least [*].  Hardware systems and modems are operational and available for 
receiving/accepting calls as measured by an ActaMed systems management and 
monitoring tool [*].  Hardware specifically includes the ActaMed host 
machines required to process Lab EDI Services transactions, ActaMed 
provisioned modems and circuit termination equipment servicing Automated 
Providers using the ActaMed Network, and other third party provisioned 
dial-in access service and devices relevant to the Lab EDI Services.  

The "Availability Percentage" for Lab EDI Services shall be calculated on [*] 
and will be based on data gathered through an automated Systems Management 
and Reporting tool [*]. Similar automated measurement and reporting will be 
implemented as soon as is practical for SCAN Sites transferred to the ActaMed 
Gateway, but not later than 180 days following such transfer of the first 
SCAN Site to the ActaMed Gateway.  The Availability Percentage is calculated 
as set forth below:

       -    Defined Hours are the total days in the month multiplied by 24
            hours.

       -    Unplanned Hours are the  hours experienced during the month in
            which the ActaMed Network is not operable or otherwise not properly
            transmitting valid Transmission as provided in the Agreement
            excluding Planned Down Hours.

       -    Actual Hours are the Defined Hours minus the Unplanned Hours.

       -    Availability Percentage is determined by dividing the Actual Hours
            by Defined Hours and multiplying the result by 100.

[*] CONFIDENTIAL TREATMENT REQUESTED

                                III.C-1-1

<PAGE>

SUCCESSFULLY DELIVERED CALLS

For each month, ActaMed shall maintain a "Successfully Delivered Call 
Percentage"  of at least [*].  The "Successfully Delivered Call Percentage" is
the total of all Successfully Delivered Calls divided by the total of attempted
calls from all sources and multiplying the result by 100.

A Successfully Delivered Call shall mean a call made to ActaMed's premise
equipment from any source for the purpose of processing Lab EDI Services. as to
which ActaMed's equipment successfully offers service, to be measured by the
call service provider's equipment facilities including:

       -    calls delivered by an Interexchange Carrier ("IXC"), such as
            Sprint, AT&T, Worldcom, etc., using toll-free dial-in service to
            will be measured by the IXC carrier switch;

       -    calls delivered by a third party dial-in access provider will be
            measured by the management capabilities of that provider's modem
            pool; and

       -    calls delivered by a local service provider or by dedicated 
            toll-free dial-in service will be measured by ActaMed's 
            terminating premise equipment.


MODEM CONNECTIVITY 

For each month, ActaMed shall maintain a "Modem Connectivity Percentage" of at
least [*].  The "Modem Connectivity Percentage" is determined by dividing the
total number of Successfully Connected Calls by the total of Successfully
Delivered Calls and multiplying the result by 100.

A Successfully Connected Call is a Successfully Delivered Call that establishes
and maintains successful modem connection as determined by the statistics
generated by the management and reporting functionality of the ActaMed
terminating modem bank and/or third party dial-in access equipment.


TRANSACTION PROCESSING 

ActaMed acknowledges and agrees that all Transactions meeting the 
requirements set forth next to one or both of the bullet points below 
("Proposed Transaction") will be processed by the ActaMed Network.  If 
Proposed Transactions are not being processed by the ActaMed Network, it will 
be treated as a Severity 1 problem.  It is expected by the Parties that [*] 
of connected and Proposed Transactions will be successfully processed within 
ActaMed Network. 

[*] CONFIDENTIAL TREATMENT REQUESTED

                                III.C-1-2

<PAGE>

- -      Any order transactions that are entered according to the applicable
       specifications and edits of the Lab EDI software such as SCAN Software
       or ActaLab Software or any other ordering software module approved by
       ActaMed and SBCL that is connected to the ActaMed Network for the
       purposes of entering lab orders and upon completion of the order entry
       indicates to the operator that the order has been accepted for
       Transmission to SBCL; and

- -      Any result transactions transmitted by SBCL systems in accordance with
       applicable specifications and containing sufficient information to allow
       the ActaMed Network to determine the approved system to which the
       transaction is to be delivered.

[*]

[*]  The Parties agree that this is not a currently automated measurement and 
is not included as a requirement of Section III.B.7, Reports.

HISTORICAL DATA FOR RE-TRANSMISSION

ActaMed will store all result transmission data on, and make it available in
accordance with the Services Agreement via, the ActaMed Gateway for a minimum of
[*].

[*] CONFIDENTIAL TREATMENT REQUESTED

                                III.C-1-3
<PAGE>

                                  EXHIBIT III.C-2

                             CUSTOMER SUPPORT STANDARDS

ACTAMED HELP DESK

The ActaMed Help Desk for all Lab EDI Services will be staffed Monday through 
Friday 8:00 AM to 8:00 PM EST excluding federally recognized holidays. Issues 
of any severity level can be reported during this time via any one of the 
following methods:

     -      Telephone via ActaMed toll-free service (800 line); 
     -      FAX;
     -      Internet e-mail to ActaMed help desk personnel; or 
     -      Internet e-mail directly into the ActaMed Help Desk call tracking
            system.

In addition, 

     -      Internet web pages are being constructed to answer frequently asked
            questions;
     -      By special arrangement, limited direct access to the ActaMed Help
            Desk call tracking system is possible; and
     -      Using Internet e-mail and the assigned tracking number, the status
            of calls can be retrieved at any time.

There shall be after hours support, which is typically limited to issues that 
are defined as Severity 1 or Severity 2 as further defined below. These are 
either issues that involve multiple users and major communications or systems 
failures, or problems involving an outage of a single Automated Provider 
(i.e. non-critical issues such as training questions, enhancement requests 
and usage questions are usually handled during normal help desk hours.)  
Service is initiated by calling the main Help Desk 800 number and leaving a 
detailed message. Voice mail left after hours or on holidays will result in a 
page to the appropriate on call analyst who will retrieve the message and 
return the call and immediately initiate investigatory and corrective actions 
as appropriate in accordance with Severity Levels.


                                   III.C-2-1
<PAGE>

CALL TRACKING

Beginning at such time as the ActaMed SCAN help desk begins to accept client
calls from ActaMed Sites, which shall occur at a date mutually agreed upon by
the parties, all calls made to the ActaMed SCAN Help Desk will be logged into
ActaMed's "Support Magic" call tracking system, and will include at a minimum
the following information:

     -    Site ID (Machine ID)
     -    Site Name
     -    Caller Name
     -    Phone Number
     -    Local Lab 
     -    Date of Call
     -    Time of Call
     -    Problem Code / Description
     -    Call Recipient / Analyst
     -    Problem Definition
     -    Call Status
     -    Solution Code / Clear Description of final resolution
     -    Severity Code
     -    Date and time of final resolution

ActaMed shall be responsible only for calls related to ActaMed Sites.  Calls
from all other SCAN sites will continue to be supported by SBCL and will
continue to be tracked by SBCL processes as in force at that time.


SEVERITY CODES

Help Desk calls will be logged and appropriate escalations will be made based
upon severity codes assigned to each call. It is the responsibility of the
analyst handling the call to assign the severity level in accordance with the
severity level definitions described below.  The definition of each


                                 III.C-2-2
<PAGE>

severity level and the classification of call types into severity levels will 
initially be as set forth below, with more specific definitions to be 
determined through negotiation between ActaMed and SBCL.  The definitions may 
be reassessed and are subject to change by mutual consent of the Parties.  
The ActaMed Help Desk's method of classifying calls into priority levels will 
be reviewed periodically with the Oversight Committee.  SBCL will be 
responsible for defining additional situations and communicating to ActaMed 
any requests on how to classify particular call situations.

SEVERITY 1

       DEFINITION: A critical system or component is down or experiencing
       degraded service causing SBCL or a customer's business functions to be
       halted.  Severity I issues will typically involve major system outages
       that affect the service provided to many users.

       REQUIRED ACTION: Immediate notification to those persons identified in
       the Crisis Management document. [*] of Severity 1 issues should be
       resolved within [*] with [*] updates between ActaMed and SBCL.

SEVERITY 2 

       DEFINITION: A single user is down; a component is experiencing degraded
       service; consumable supplies are unavailable and does not have a
       critical impact on the business, but may restrict function to some users
       and may impact normal business operations.

       REQUIRED ACTION: The help desk will asses the situation and verify that
       setup or configuration problems are not the cause. After the original
       assessment has been made, an ActaMed CIS representative will normally be
       dispatched to correct or replace the failing component. In remote areas
       where localized support is not available, a replacement component will
       be shipped for next day delivery, and arrangements will be made to
       provide assistance setting up or installing that component. 
       Arrangements will also be made to remove or arrange for the removal of
       the failed component. [*] of Severity 2 calls should be resolved within
       [*] with updates to the affected user every [*] or less.

SEVERITY 3

       DEFINITION: A user's system is still operating but is experiencing
       difficulties or a specially requested deliverable is unavailable.

       REQUIRED ACTION: The Help Desk will make every attempt to resolve the
       issue over the phone or using the tools available to them. If those
       attempts are not successful, a ActaMed CIS representative might be
       called upon to resolve the issue on site, but these issues will
       typically have a lower priority than the Severity 2 issues listed above.
       [*] of Severity 3 calls will be resolved within [*] with updates to
       the affected user every [*] or less.

[*] CONFIDENTIAL TREATMENT REQUESTED

                                 III.C-2-3
<PAGE>

NEW SITE INSTALLATION

In accordance with the agreed upon procedures for installing New Sites (or [*]
Sites) that SBCL requests or approves for Lab EDI Services, ActaMed will:

      -     If required, phone line installation and new service will be
            ordered on behalf of the Provider or SBCL on average within [*] of
            receipt of new site notification and,
      -     Provide installation and training, including any hardware required
            under Section IV.L of the Services Agreement, to properly prepare
            and set up the new client to use Lab EDI Services within [*] of 
            receipt of new site notification and phone line availability; or
      -     PIF Sites will be installed within [*] from the time the 
            notification is received and phone service is available.

except that, (i) delays caused by the practice management system vendor or the
Provider, shall not be the responsibility of ActaMed; and (ii) SBCL and ActaMed
will, when necessary, cooperate in the development of site installation
schedules to reflect periods of high volumes of new installations and remote
installations (usually requiring air travel).

DE-INSTALLATIONS

When required by the Assets Purchase Agreement or this Agreement, ActaMed 
will deinstall any Automated Provider within [*] of receipt of SBCL's 
deinstallation request.  Re-deployment of the deinstalled PC System for Lab 
EDI Services  will be in accordance with Section IV of the Services Agreement 
and in accordance with the performance metrics of a New Site.

RETAINING

ActaMed will provide ongoing training support in a manner and at such frequency
as is reasonably required to maintain client satisfaction and ability to
continue to use Lab EDI Services effectively to process laboratory transactions.


SCAN CONSUMABLE SUPPLIES

ActaMed will provide, [*] consumable supplies required by all ActaMed Sites 
for use of Lab EDI Services including printer paper, toner cartridges, backup 
tape cartridges and labels that meet SBCL label specifications.  ActaMed will 
deliver or arrange for delivery of these as required for uninterrupted use of 
Lab EDI Services.  Client requests for such supplies that prevent use of Lab 
EDI Services will be considered a Severity [*] problem.

[*] CONFIDENTIAL TREATMENT REQUESTED

                                 II.C-2-4
<PAGE>

MEASUREMENTS AND REPORTING

Measurement will begin when the problem is received by the ActaMed Help Desk at
which time it will be recorded into the computerized on-line problem management
tool.  Measurement will end when the call is resolved satisfactorily and closed
by the ActaMed Help Desk representative.  In the case of calls that have been
forwarded to an SBCL facility for questions or issues not covered by the ActaMed
Help Desk, the ActaMed Analyst will, except in those cases where the problem
determination or resolution is clearly the responsibility of SBCL because of the
nature of the call, take ownership of that call and follow it through any other
path it may take. So long as SBCL provides the information needed to resolve
such a call, ActaMed will also be made to document that call and close it out
with a detailed explanation of the final resolution. Where it is not possible
for the ActaMed Analyst to remain "on the call", it is the responsibility of the
SBCL personnel to notify the ActaMed Help Desk if the outcome is to be
documented in the help desk system.

Other measurements that will be made available on a monthly basis will come from
the ACD system. The variety of reports available based upon the call tracking
system and the ACD statistics will include:

<TABLE>
<CAPTION>
        REPORT                         TARGET SERVICE LEVEL
        ------                         --------------------
        <S>                            <C>
        Number of calls by category    N/A, will vary

        Calls by region                N/A, will vary

        Abandoned call rate            *

        Average hold time                [*] 
</TABLE>

*  since there is no currently available SBCL baseline to be used to set
reasonable standards, ActaMed will record these metrics from the beginning of
its operations of the help desk.  After the first four months of help desk
operation, ActaMed and SBCL will evaluate performance and set mutually-agreeable
metrics based on SBCL's actual performance and generally accepted performance
standards for similar services.  In no case shall such metrics result in
standards lower than those generally found in the industry for similar services.

The percent of calls closed within the time frame objectives will be measured by
calculating, by priority level, the volume of calls closed within the time frame
objectives as a percentage of total calls opened.

The ActaMed Help Desk will use best efforts to accommodate any requests for
additional information as long as the collection of the information does not add
significant time and effort in logging the call.  The ActaMed Help Desk
statistics will be reported to SBCL on a monthly basis. The means of
distribution is yet to be determined.

[*] CONFIDENTIAL TREATMENT REQUESTED

                                 III.C-2-5
<PAGE>

SATISFACTION LEVELS

For each year during the term of the Services Agreement, ActaMed will perform
client satisfaction surveys assessing Automated Providers' satisfaction with
ActaMed's Lab EDI Services.  The format and content of the annual surveys shall
be determined by ActaMed except that ActaMed will afford SBCL reasonable
opportunity to review and comment thereon prior to its use.  The annual survey
will be conducted at annual intervals.


















                                 III.C-2-6
<PAGE>



                                    EXHIBIT IV.I

                       AVERAGE REVENUE/REQUISITION & MONTHLY
                           AVERAGE NUMBER OF REQUISITIONS















                                       IV.I-1
<PAGE>

                                    EXHIBIT V.A

                                    MAINTENANCE

ActaMed will provide SBCL with the following hardware, network and application
(product) maintenance services which will be performed by ActaMed staff not
dedicated to SBCL enhancements.  The cost of these maintenance services are
provided as a part of the annual Fixed Fee and Transaction Fees, and include the
following:

PRODUCT MAINTENANCE

- -      Maintenance of the Network through both emergency and routine bug fixes
       and scheduled maintenance releases;

- -      Such changes and modifications to the Network required to manage
       scalability and capacity issues associated with increased transaction
       volumes;

- -      Provision of  routine, updated application documentation and training
       materials;

- -      Provision of periodic product updates to improve usability and to
       improve existing features and functionality.

PERFORMANCE

- -      Maintenance, monitoring and reporting of hardware, network and
       communication systems regarding stability and performance as specified
       in Exhibit III.C-1 Network Standards;

- -      Changes required to maintain above service level commitments, including
       changes and modifications required to manage scalability and capacity
       issues associated with increased transaction volumes;

- -      Technology upgrades to the Network (to include such things as fault
       tolerance produces and services) will be included as part of ongoing
       maintenance; and 

- -      Maintenance of appropriate connectivity to SBCL host systems to maintain
       security provisions and the data integrity of Transmissions.


                                   IV.I-2
<PAGE>

                                    EXHIBIT V.B
                                          
                                YEAR 2000 WARRANTIES


ActaMed warrants that the SCAN Software and ActaLab Software as compiled on any
hardware and operating system platform designated in its documentation
("Platforms") will satisfy all of the following:

            (a)  Such software will properly process date-related information
from different centuries (19th through 21st). Results utilizing such software
will be consistent and correct whether or not dates being processed span
different centuries and will be given with the proper indication of century.

            (b)  Data involving date information which will be generated from
use of the software will be coded in a manner that captures, stores and displays
date-related information so that the software will properly access and process
the data regardless of the century involved.

            (c)  The software will properly process date-related data which had
been generated by previous versions of thereof regardless of the century
involved.

            (d)  The software interfaces with the operating system and other
software, and with devices, will properly exchange and use date-related
information regardless of the century involved, so long as such other software,
systems and devices provide date-related information in a compatible format. 

            (e)  The software will check any date-related information provided
by the user, and by any devices, systems or software with which the software
interfaces, and will reject any date-related information which is not provided
in a format which the software will properly process. When data is rejected, the
software will generate an explanatory error message.

            (f)  The software will not have a feature which will cause it to
stop operating or to limit or alter its functions or performance because of a
date or time extending beyond 11:59:59 p.m. on December 31, 1999.

            (g)  The software will process information relating to years
beginning with 2000 properly, including recognizing that the year 2000 and every
fourth year thereafter is a leap year.

            (h)  The software (including but not limited to, runtime systems)
will function correctly if executing at the moment when the year changes from
1999 to 2000.  The software setup and updates will not be affected by the
century change.


                                     V.B-1
<PAGE>

                                  EXHIBIT VII.C-1
                                          
                         CURRENT CONNECTIVITY ARRANGEMENTS























                                   VII.C-1-1
<PAGE>

                                  EXHIBIT VII.C-2
                                          
                       EXCLUSIONS TO PREFERRED VENDOR STATUS


The SBCL covenants and restrictions contained in Section VII of the Services
Agreement (Preferred LAB EDI Vendor) do not apply to any arrangements,
relationships or initiatives by or between SBCL and any of the following parties
or for any of the following relationships:

      [*]

      [*]

      [*]

      [*]

      [*]

      [*]

      [*]

[*] CONFIDENTIAL TREATMENT REQUESTED


                                  VII.C-2-1
<PAGE>

                              AMENDMENT NO. 1 TO
                              SERVICES AGREEMENT


          This AMENDMENT NO. 1 TO SERVICES AGREEMENT ("Amendment No. 1") is 
made and entered into this 15th day of May, 1998 by and between ACTAMED 
CORPORATION, a Georgia Corporation ("ActaMed") and SMITHKLINE BEECHAM 
CLINICAL LABORATORIES, INC., a Delaware Corporation ("SBCL").

          WHEREAS, ActaMed and SBCL entered into a Services Agreement on
December 31, 1997 ("Services Agreement") and desire to amend same in connection
with the merger a subsidiary of Healtheon Corporation with and into ActaMed,
with the result that ActaMed will become a wholly-owned subsidiary of Healtheon.

          NOW THEREFORE, in consideration of the premises and the mutual
promises contained herein, the parties, intending to be legally bound, agree as
follows:

1    DEFINITIONS.

     Capitalized terms used in this Amendment No. 1 and not otherwise defined
herein have the meanings set forth in the Services Agreement.

2    AMENDMENTS.

     2.1    [*] REMOVED FROM [*].  Section IV.C is replaced in its entirety as 
follows:

                 "1.     An amount (the "FIRST VARIABLE FEE") equal to (i) [*]
     minus the aggregate of the amount billed to SBCL pursuant to Section 
     IV.B. above, excluding amounts attributable to any Provider office with 
     ProviderLink that is subsequently installed with the Scan Software or 
     ActaLab Software (the "FIRST TRANSACTION FEE AMOUNT") prior to the [*] 
     (ii) [*] minus the sum of (A) the First Transaction Fee Amount for the 
     period from the date hereof to the [*] and (B) the amount paid pursuant 
     to clause (i) above; and (iii) [*] minus the sum of (A) the First 
     Transaction Fee Amount for the period from the date hereof to the [*] and 
     (B) the amount paid pursuant to clauses (i) and (ii) above.
     
                 2.      An amount (the "SECOND VARIABLE FEE") equal to (i) 
     [*] minus the aggregate of the amount paid plus amounts owed (whether or 
     not billed) pursuant to Section IV.M.1 below (the 

[*] CONFIDENTIAL TREATMENT REQUESTED


<PAGE>

     "PIF AMOUNT") prior to the [*]; (ii) [*] minus the sum of (A) the PIF 
     Amount for the period from the date hereof to the [*] and (B) the amount 
     paid pursuant to clause (i) above; and (iii) [*] minus the sum of (A) the 
     PIF Amount for the period from the date hereof to the [*] and (B) the 
     amount paid pursuant to clauses (i) and (ii) above; PROVIDED THAT if the 
     PIF Amount with respect to an annual period (other than the last such 
     annual period) is at least [*] of the aforementioned dollar amount for 
     that annual period, no payment shall be due under this Section IV.C.2 for 
     such annual period.

                 3.      An amount (the "THIRD VARIABLE FEE" and together 
     with the First Variable Fee and Second Variable Fee, the "VARIABLE 
     FEES") equal to (i) [*] minus the aggregate of the amount billed to SBCL 
     attributable to any Provider office with ProviderLink that is 
     subsequently installed with the Scan Software or ActaLab Software (the 
     "THIRD TRANSACTION FEE AMOUNT") prior to the [*]; (ii) [*] minus the sum 
     of (A) the Third Transaction Fee Amount for the period from the date 
     hereof to the [*] and (B) the amount paid pursuant to clause (i) above; 
     and (iii) [*] minus the sum of (A) the Third Transaction Fee Amount for 
     the period from the date hereof to the [*] and (B) the amount paid pursuant
     to clauses (i) and (ii) above.
     
                 4.      Subject to Section IV.D, the Variable Fees shall be 
     paid annually within thirty (30) days after invoice therefor from 
     ActaMed or Healtheon, which shall be (i) submitted to SBCL within [*] 
     (ii) detail the calculation thereof, and (iii) reflect the Variable Fees 
     payable in respect of the most recently completed annual period only.  
     SBCL shall have Audit Rights with respect to any disputed amount of the 
     Variable Fees."

     2.2    CONDITIONS TO BUSINESS ASSURANCE PAYMENTS.  Section IV.D.1 is
hereby replaced in its entirety as follows:

            "1.  With respect to all Variable Fees, (i) such fees shall
     cease to be payable if ActaMed shall fail to satisfy any of the Key
     Performance Standards, or (ii) such fees (excluding the portion of the
     First Variable Fee attributable to Transaction Fees generated from PIF
     Sites) for the applicable year shall not be payable (but shall be
     treated as paid for purposes of calculation of any amount payable in
     the following year) if any of the following shall occur:
     
                 a.      As of [*] ActaMed shall fail to have at least [*] 
     ActaMed Sites;

[*] CONFIDENTIAL TREATMENT REQUESTED

                                     -2-
<PAGE>

                 b.      As of [*] ActaMed shall fail to have at least [*] 
     ActaMed Sites; and 

                 c.      As of [*] ActaMed shall fail to have at least [*] 
     ActaMed Sites.

     2.3    CONDITIONS TO BUSINESS ASSURANCE PAYMENTS.  Section IV.D is hereby
further amended by adding the following Subsection 3 at the end of such Section:

            "3.  With respect to the Third Variable Fee, such fees also
     shall not be payable (but shall be treated as paid for purposes of
     calculating any amount payable in the following year) if any of the
     following shall occur: 

                 a.      As of [*] ActaMed shall fail to have at least [*] 
     ActaMed Sites;
     
                 b.      As of [*] ActaMed shall fail to have at least [*] 
     ActaMed Sites; and 
     
                 c.      As of [*] ActaMed shall fail to have at least [*] 
     ActaMed Sites.
     
     2.4    [*] COSTS.  Section IV.J is amended to insert at the end thereof: 
"SBCL is not responsible for paying any [*] incurred by ActaMed or a Provider 
relating to the provision of Lab EDI Services, including without limitation, 
any [*], [*] and [*]."

     2.5    REMOVAL OF [*] HARDWARE PURCHASES.  Section IV.K.2.b is
replaced in its entirety as follows:

            "b.  In addition, ActaMed shall provide, prior to the [*] up to 
     [*] PC Systems for New Sites or Replacement Fixed Fee Sites in excess of 
     the [*] set forth in (a) above.  Notwithstanding the above, this 
     obligation shall be reduced by each PC System the cost of which is 
     reimbursed to SBCL subject to Section IV.K.1 above."

[*] CONFIDENTIAL TREATMENT REQUESTED

                                     -3-
<PAGE>

     2.6    EXCLUSIVE DEVELOPMENTS AMENDED.   Section V.E is replaced in its
entirety as follows:

            "E.  DEVELOPMENT WORK REQUESTED BY SBCL.
     
                 1.      SBCL may at any time request that ActaMed perform
     additional development work.  Subject to the terms of this Section
     V.E, SBCL shall pay ActaMed for development services the work product
     from which constitutes an Exclusive Development at no higher than the
     then industry standard rates for similar services.
     
                         a.   SBCL shall be entitled to request in writing 
     that ActaMed perform development services the resulting work from which 
     shall be for the exclusive benefit of SBCL (an "EXCLUSIVE DEVELOPMENT"); 
     provided that, except as provided in Section V.E.1.b, SBCL shall not be 
     entitled to more than [*] Exclusive Development [*].  If ActaMed, before 
     9:00 AM (EST) of the [*] after the date on which such request is 
     received by ActaMed, delivers to SBCL [*] then, notwithstanding that 
     SBCL's request specified that the work would be an Exclusive Development, 
     the work so requested by SBCL shall be a "COMMON DEVELOPMENT."  Under no 
     circumstances shall any SBCL requested development work that is required 
     for purposes of complying with Applicable Laws, Regulations or any 
     Regulatory Change constitute an Exclusive Development.  Any SBCL 
     requested work that is (i) classified as a Common Development in 
     accordance with this Section V.E.1.a, or (ii) required to comply with 
     Applicable Laws, Regulations or any Regulatory Change, shall not be 
     counted for purposes of applying the limit on Exclusive Developments 
     under this Section V.E.1.a.
     
                         b.   SBCL may request in writing that ActaMed
     provide additional development work at any time.  Such work shall
     result in either a Common Development or Exclusive Development
     pursuant to price and terms agreed to by the parties in accordance
     with Section V.E.1.e below.  Any work classified as an Exclusive
     Development in accordance with this Section V.E.1.b shall not be
     counted for purposes of applying the limit on Exclusive Developments
     under this Section V.E.1.a.
     
                         c.   ActaMed will not use or license the use of
     any Exclusive Development (without regard to whether it constitutes a
     SCAN Development or ActaLab Software) other than in support of Lab EDI
     Services.  Subject to the ownership and license rights under the
     License Agreement, both 

[*] CONFIDENTIAL TREATMENT REQUESTED

                                     -4-
<PAGE>

     ActaMed and SBCL shall be entitled to make any use of a Common 
     Development.  The terms of the foregoing two sentences shall survive 
     termination of this Agreement for any reason.  ActaMed may charge SBCL 
     [*] the work product from which constitutes a Common Development.  Any 
     such charge shall be [*] and shall be separately stated on invoices sent 
     to SBCL.

                         d.   For purposes of this Section V.E, Exclusive
     Developments shall include any Changes made pursuant to Section V.C
     and paid for by SBCL by reason of Section V.C.4, to be designated as
     Exclusive Developments in accordance with the procedures set forth in
     this Section V.E.1.
     
                         e.   Within [*] days after receiving SBCL's request 
     pursuant to Sections V.E.1.a or V.E.1.b, ActaMed shall notify SBCL of 
     ActaMed's prices and terms (including estimated completion date) for 
     performing such development work, which prices and terms SBCL shall not 
     unreasonably reject.  Within twenty (20) days after receiving ActaMed's 
     notice, SBCL shall accept or reject ActaMed's prices and terms for 
     performing the development work.  If SBCL provides notice accepting (i) 
     in respect of requests under Section V.E.1.a, ActaMed's prices and 
     terms, or (ii) in respect of requests under Section V.E.1.b (A) 
     ActaMed's prices and terms, and (B) ActaMed's designation of the work as 
     an Exclusive Development or Common Development, then ActaMed shall 
     perform such work (or cause such work to be performed) on the accepted 
     terms, and shall integrate the developed work into the ActaLab Software 
     or SCAN Developments, as applicable, and offer it as an additional 
     feature or function of Lab EDI Services, as soon as is reasonably 
     practicable.
     
     If SBCL provides notice that it does not accept ActaMed's prices and 
     terms, SBCL and ActaMed shall negotiate in good faith an alternative
     arrangement to the mutual satisfaction of the parties.  If within [*] 
     SBCL and ActaMed cannot reasonably agree upon such an alternative 
     arrangement,  then SBCL may engage a third party to perform the 
     development services for such work, subject to Section V.E.1.f.  Work 
     performed by such a third party shall be (i) an Exclusive Development 
     without regard to the frequency limitation of Section V.E.1.a, subject 
     to Section V.E.1.f below, (ii) integrated by ActaMed into the ActaLab 
     Software or SCAN Developments, as applicable, as soon as is reasonably 
     practicable, and (iii) offered by ActaMed as an additional feature or 
     function of Lab EDI Services, as soon as is reasonably practicable.  
     
     SBCL and ActaMed shall cooperate in developing acceptance standards
     and processes (the "ACCEPTANCE PROCESS") pursuant to which work
     prepared by a third party, in accordance with industry standard
     practices, shall be (i) reviewed, tested and modified, as necessary,
     to conform with ActaMed's professional standards, 

[*] CONFIDENTIAL TREATMENT REQUESTED

                                     -5-
<PAGE>

     the Performance Standards and ActaMed's compliance obligations under 
     Article VI, (ii) integrated into the ActaLab Software or SCAN 
     Developments, as applicable, and (iii) offered by ActaMed as an 
     additional feature or function of Lab EDI Services; provided, SBCL 
     shall reimburse ActaMed (at no higher than the then industry standard 
     rates for similar services) for any costs or expenses incurred by 
     ActaMed in any such testing, integration and offering of an additional 
     feature or function of Lab EDI Services under this Section V.E.1.e.

                         f.   Any contract between ActaMed and SBCL (or a
     third party developer and SBCL) for development of an Exclusive
     Development shall allocate ownership of and other rights with respect
     to the Exclusive Development, as between ActaMed and SBCL, in the
     manner contemplated by the License Agreement and Development
     Agreement, including, without limitation, Sections 2.1.4 and 2.3.2 of
     the License Agreement.

                 2.      If, at any time, SBCL chooses to contract with
     ActaMed for a dedicated services team from ActaMed to handle
     development of Changes to the Network, the Licensed Materials, or
     SBCL's proprietary systems which are not required to be performed by
     ActaMed pursuant to Section V.C and which are not requested pursuant
     to Section V.E, ActaMed may elect whether to provide the dedicated
     team and, if it so elects, shall do so only on terms and conditions
     agreed to in advance by SBCL."

     2.7    EXCLUSIVITY PERIOD.  Section XIII.C.2 is hereby replaced in its
entirety as follows:

            2.   At any time prior to [*] ActaMed shall not provide services 
     to any Other Lab at the SBCL Sites transferred to ActaMed pursuant to 
     the Purchase Agreement, including without limitation, to install or be 
     instrumental in [*] located at such sites which [*] for services [*] or 
     otherwise provide [*].  A full calendar month shall be added to the date 
     set forth in the preceding sentence for each month after [*] in which 
     ActaMed, determined as of the first day of each succeeding month, has 
     failed to complete the development of a fully functional ActaLab 
     Software (as described in the Development Agreement) and deploy a fully 
     tested, accepted and operating version of such software at one or more 
     ActaMed Sites.

3    MISCELLANEOUS.

     3.1    ENTIRE AGREEMENT.  This Amendment No. 1 constitutes the entire
understanding between the parties with respect to amendment to the Services
Agreement and supersedes all proposals, communications and agreements between
the parties relating to such subject matter. 


[*] CONFIDENTIAL TREATMENT REQUESTED

                                     -6-
<PAGE>

No amendment, change, or waiver of any provision of this Amendment No. 1 will 
be binding unless in writing and signed by both parties.

     3.2    GOVERNING LAW.  This Amendment No. 1 will be governed by and
construed in accordance with the laws of the State of Georgia applicable to
contracts made and performed therein.

     3.3    SERVICES AGREEMENT PROVISIONS.  All provisions of the Services
Agreement not modified by this Amendment No. 1 shall remain in full force and
effect.  Subsections D, E and F of Section XVI of the Services Agreement shall
apply to this Amendment No. 1 as if fully set forth herein.

     3.4    COUNTERPARTS.  This Amendment No. 1 may be executed in one or more
counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument.





                        [INTENTIONALLY LEFT BLANK]





                                     -7-
<PAGE>

            IN WITNESS WHEREOF, the parties have executed this Amendment No. 1
to the Services Agreement as of the date set forth above.


                                     ACTAMED CORPORATION

                                     By:     /s/
                                        ---------------------------------------
                                     Its:    President & CEO
                                         --------------------------------------

                                     SMITHKLINE BEECHAM CLINICAL LABORATORIES,
                                     INC.

                                     By:     /s/
                                        ---------------------------------------

                                     Its:    President
                                         --------------------------------------






                                     -8-




<PAGE>

                             ASSETS PURCHASE AGREEMENT 
                                          
                                      between
                                          
                  SMITHKLINE BEECHAM CLINICAL LABORATORIES, INC.  
                                          
                                        and 
                                          
                                ACTAMED CORPORATION
                                          
                                          
                                       DATED
                                          
                                 DECEMBER 31, 1997
                                          
                                          
<PAGE>
                                          
                                 TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                 PAGE
                                                                                 ----
<S>                                                                              <C>
ARTICLE 1 PURCHASE AND SALE ........................................................2

    Section 1.1     Agreement to Sell ..............................................2
    Section 1.2     Other Software .................................................2
    Section 1.3     Excluded Assets ................................................3
    Section 1.4     Agreement to Purchase ..........................................3
    Section 1.5     The Purchase Price .............................................3
    Section 1.6     Series D Price .................................................4
    Section 1.7     Purchase Price Adjustment ......................................5
    Section 1.8     Number of Sites Adjustment .....................................5

ARTICLE 2 CLOSINGS .................................................................6

    Section 2.1     Initial Closing ................................................6
    Section 2.2     Staging of the Transactions ....................................6
    Section 2.3     Regions to be Transferred ......................................7
    Section 2.4     Procedures Applicable if Transfer Benchmarks Are Not Met .......8
    Section 2.5     Deliveries by SBCL at Each of the Transfer Dates ...............9
    Section 2.6     Deliveries by ActaMed at Each of the Transfer Dates ............9
    Section 2.7     Prorations ....................................................10
    Section 2.8     Non-Transferable Assets .......................................10

ARTICLE 3 REPRESENTATIONS AND WARRANTIES ..........................................11

    Section 3.1     By SBCL .......................................................11
    Section 3.2     By ActaMed ....................................................16

ARTICLE 4 TRANSITION MATTERS ......................................................26

    Section 4.1     Prior to Region Transfer ......................................26
    Section 4.2     Region Transition Matters .....................................26
    Section 4.3     General Covenants .............................................27
    Section 4.4     Confidentiality of Trade Secrets ..............................29
    Section 4.5     Efforts to Satisfy Conditions .................................30
    Section 4.6     Expenses ......................................................31
    Section 4.7     Antitrust Notification ........................................31

ARTICLE 5 ACTAMED COVENANTS TO SBCL ...............................................31

    Section 5.1     Additional Covenants Of ActaMed ...............................31
    Section 5.2     Informational Covenants Of ActaMed ............................35


                                            -i-

<PAGE>

ARTICLE 6 EMPLOYEE MATTERS ........................................................38

    Section 6.1     Termination of Employment by SBCL and 
                      Offer of Employment by ActaMed ..............................38
    Section 6.2     Transitional Employee Leasing Arrangement .....................38
    Section 6.3     ActaMed Compensation and Benefits .............................39
    Section 6.4     Past Service Credit ...........................................39
    Section 6.5     Termination of Employment; Nonsolicitation; Termination 
                      of Agreement ................................................39
    Section 6.6     Payment of Wage and Benefit Costs .............................39
    Section 6.7     Taxes, Unemployment Insurance and Related Items ...............40
    Section 6.8     Examination and Audit .........................................41

ARTICLE 7 CONDITIONS PRECEDENT TO OBLIGATIONS OF ACTAMED ..........................41

    Section 7.1     Conditions Precedent To Obligations Of ActaMed ................41
    Section 7.2     Conditions Precedent To The Obligations Of SBCL ...............42

ARTICLE 8 SURVIVAL OF REPRESENTATIONS, WARRANTIES AND COVENANTS ...................43

    Section 8.1     Survival Of Representations, Warranties and Covenants .........43
    Section 8.2     Obligation to Indemnify .......................................44

ARTICLE 9 DISPUTE RESOLUTION ......................................................49

    Section 9.1     Informal Dispute Resolution ...................................49
    Section 9.2     Arbitration ...................................................50
    Section 9.3     Litigation ....................................................51

ARTICLE 10 TERMINATION ............................................................51

    Section 10.1    Termination ...................................................51
    Section 10.2    Risk of Loss ..................................................52

ARTICLE 11 MISCELLANEOUS ..........................................................53

    Section 11.1    General Provisions ............................................53

</TABLE>


                                        -ii-

<PAGE>

                          CONFIDENTIAL TREATMENT REQUESTED

                             ASSETS PURCHASE AGREEMENT

     This Assets Purchase Agreement (this "ASSETS PURCHASE AGREEMENT" or
"AGREEMENT"),  dated as of December 31, 1997, is an agreement by and between
SMITHKLINE BEECHAM CLINICAL LABORATORIES, INC., a corporation organized and
existing under the laws of Delaware ("SBCL") and ACTAMED CORPORATION, a
corporation organized and existing under the laws of Georgia ("ACTAMED"). 
Capitalized terms used in this Assets Purchase Agreement and not otherwise
defined herein are defined in EXHIBIT A attached to this Assets Purchase
Agreement.
                                          
                                    PREAMBLE

     ActaMed is in the business of providing electronic data interchange
products and services to the health care industry, including its ProviderLink
software, and desires to develop business involving automated laboratory order
entry and results reporting services.

     SBCL provides laboratory testing services to certain Providers who use SBCL
Software  for electronic clinical laboratory test order entry and/or test result
reporting between an  SBCL Lab and such Provider.  In addition, SBCL uses the
SBCL Software to allow certain [*] to send laboratory test orders entered
electronically to an SBCL Lab and/or to have the test results reported
electronically back to [*] or the Provider ordering the test.

          The Parties previously entered into a Development Agreement dated
October 31, 1997 pursuant to which ActaMed and SBCL are jointly developing the
ActaLab Software.

          ActaMed desires to purchase and SBCL desires to sell certain assets
associated with SBCL's provision of Lab EDI Services, as more fully set forth
herein.  Concurrently with the execution and delivery of this Purchase
Agreement, SBCL and ActaMed are entering into (i) a License Agreement whereby,
among other things, SBCL grants ActaMed an irrevocable non-exclusive license to
the SBCL Software (as defined therein); and (ii) a Services Agreement whereby
ActaMed agrees, among other things, to provide Lab EDI Services to Automated
Providers and SBCL agrees to pay certain compensation to ActaMed in connection
therewith.  This Assets Purchase Agreement states the parties' agreements
relating to the purchase and sale of the SCAN Assets and certain transition
matters.

          The Parties contemplate that there will be a staged transfer to
ActaMed of the SCAN Assets.  The transfer of Region One SCAN Assets is to occur
on the Region One Transfer Date.  The transfer of the other Regions will occur
sequentially when the Transfer Benchmarks for transfer of such Regions have been
met.
                                          
                                     AGREEMENT

          In consideration of the recitals and of the respective covenants,
representations, warranties and agreements herein contained, and intending to be
legally bound hereby, the parties hereto hereby agree as follows:

[*] CONFIDENTIAL TREATMENT REQUESTED

<PAGE>

                                   ARTICLE 1 

                               PURCHASE AND SALE

     SECTION 1.1    AGREEMENT TO SELL.  SBCL hereby agrees to sell, convey,
assign, transfer and deliver to ActaMed, upon and subject to the terms and
conditions of this Assets Purchase Agreement, all right, title and interest of
SBCL in and to the following assets located in Region One, and, subject in
addition to fulfillment of the conditions precedent set forth in Section 2.3,
the following assets in Regions Two, Three, and Four, in every case free and
clear of all Liens: 

                    1.1.1     The personal computers, modems, bar code 
readers, bar code label printers, requisition and results printers and other 
peripherals (not including [*]) and spare parts owned by SBCL and provided by 
SBCL to Automated Providers for Lab EDI Services (or which comprised all or 
part of such items located at an SBCL Site before the Applicable Transfer 
Date, but not located at an SBCL Site on the Applicable Transfer Date), 
including all documentation supplied to Automated Providers for purposes of 
utilizing SBCL Software;

                    1.1.2     SBCL's contractual right to use the telephone
lines that are installed at an SBCL Site and are used by SBCL in providing Lab
EDI Services to the extent assignable and assumed by ActaMed;

                    1.1.3     The letter agreements, as amended, between SBCL
and Automated Providers relating to Automated Providers' use of SBCL's Lab EDI
Services; 

                    1.1.4     The vendor contracts between SBCL and various
vendors who provide products or services to Automated Providers in connection
with SBCL's provision of Lab EDI Services to SBCL Sites to the extent assignable
and assumed by ActaMed;

                    1.1.5     All personal computers, peripherals, spare parts
and other fixed assets not located at an SBCL Site on the Applicable Transfer
Date, but used solely by the Transferred Employees and exclusively in connection
with SBCL's provision of software development, field or remote support for SBCL
Sites; and

                    1.1.6     SBCL's rights to the ActaLab Software.

     SECTION 1.2    OTHER SOFTWARE.

                    1.2.1     In conjunction with the sale of each PC System and
each personal computer described in Section 1.1.5 (an "Employee Computer") to
ActaMed in accordance herewith, SBCL shall assign to ActaMed all of SBCL's
rights in the copies of Third Party Software (excluding any office software used
by the Employees, including without limitation, cc:mail) that, as of the
Applicable Transfer Date, are (i) installed by, or in accordance with the

[*] CONFIDENTIAL TREATMENT REQUESTED

                                -2-
<PAGE>


instructions of, SBCL and (ii) is resident on such PC System or Employee
Computer, which rights shall be sufficient to permit ActaMed to:

                              (a)  continue using such copy of the Third Party
Software on the applicable PC System or Employee Computer,

                              (b)  move such copy to a replacement computer so
long as the copy is deleted from the PC System or Employee Computer on which it
resides on the Applicable Transfer Date or subsequent transferee computer
system, and

                              (c)  assign ActaMed's rights in such copy to a
purchaser of the applicable components of the  PC System (but not to a purchaser
of any Employee Computer) on which it resides at the Applicable Transfer Date,
or replacement computer with respect to any PC System; 

PROVIDED, that (A) ActaMed agrees to comply with any applicable terms and
conditions imposed by the supplier of such Third Party Software, (B) except as
expressly set forth herein, nothing in this Section 1.2 shall be construed as
assigning to ActaMed, or granting to ActaMed, any rights under any agreements
between SBCL and the vendors of such Third Party Software, and (C) nothing in
this Agreement shall be construed as conveying to ActaMed or any other party any
software installed on any PC System or Employee Computer other than by SBCL or
pursuant to SBCL's instructions.

                    1.2.2     SBCL shall transfer to ActaMed, proportionately 
with the number of SBCL Sites transferred to ActaMed from time to time in 
accordance with this Agreement, all of SBCL's rights in, including the 
single-site licenses for, any copy of Microsoft Windows which was resident on 
a PC System when it was delivered to SBCL by the manufacturer or other 
supplier for installation at an SBCL Site, and subsequently removed by SBCL.  
SBCL shall deliver the licenses to ActaMed.

     SECTION 1.3    EXCLUDED ASSETS.  The SCAN Assets shall not include
computers, modems, bar code readers, bar code label printers, requisition and
results printers and other peripherals and fixed assets acquired by SBCL for use
in providing Lab EDI Services, but which have never been so used.

     SECTION 1.4    AGREEMENT TO PURCHASE.  ActaMed hereby agrees to purchase
the SCAN Assets from SBCL, upon and subject to the terms and conditions of this
Assets Purchase Agreement and in reliance on the representations, warranties and
covenants of SBCL contained herein, for the Purchase Price and the execution and
delivery of the Assumption Agreement.  ActaMed shall not assume or be
responsible for any liabilities or obligations of SBCL other than the
Liabilities assumed by virtue of the Assumption Agreement.

     SECTION 1.5    THE PURCHASE PRICE.  Subject to any adjustment pursuant to
Sections 1.7 or 1.8 hereof, the purchase price for the SCAN Assets and the
rights granted to ActaMed 


                                   -3-
<PAGE>


pursuant to the License Agreement shall be [*].  The Purchase Price shall be 
allocated among the SCAN Assets in the different Regions and the License 
granted pursuant to the License Agreement as set forth in Schedule 1.5 hereto 
(the "Purchase Price").  The Purchase Price shall be payable as follows:

                    1.5.1     on the Region One Transfer Date, in 
consideration for the grant of rights pursuant to the License Agreement, 
ActaMed will pay or issue to SBCL (A) [*] by wire transfer of immediately 
available funds to an account designated by SBCL prior to the Region One 
Transfer Date, and (B) [*] shares of ActaMed's Series D Preferred Stock;

                    1.5.2     on the Region One Transfer Date, in consideration
of the transfer to ActaMed of the SCAN Assets located in Region One, ActaMed
will issue to SBCL [*] shares of ActaMed's Series D Preferred Stock; 

                    1.5.3     on the Region Two Transfer Date, in further 
consideration of the grant to ActaMed of rights under the License Agreement, 
and in consideration of the transfer to ActaMed of the SCAN Assets located in 
Region Two, ActaMed will issue to SBCL the  number of shares of ActaMed's 
Series D Preferred Stock determined by dividing [*] plus [*] respectively, 
by the Series D Price on such date;

                    1.5.4     on the Region Three Transfer Date, in further 
consideration of the grant to ActaMed of rights under the License Agreement, 
and in consideration of the transfer to ActaMed of the SCAN Assets located in 
Region Three, ActaMed will issue to SBCL the  number of shares of ActaMed's 
Series D Preferred Stock determined by dividing [*] plus [*] respectively, 
by the Series D Price on such date; and

                    1.5.5     on the Region Four Transfer Date, in further 
consideration of the grant to ActaMed of rights under the License Agreement, 
and in consideration of the transfer to ActaMed of the SCAN Assets located in 
Region Four, ActaMed will issue to SBCL the  number of shares of ActaMed's 
Series D Preferred Stock determined by dividing [*] plus [*] respectively, 
by the Series D Price on such date.

     SECTION 1.6    SERIES D PRICE.  For purposes hereof, the "Series D Price"
shall mean:

                    1.6.1     prior to ActaMed's initial Public Offering:

                              (a)  [*] on the Region One Transfer Date and 
the Region Two Transfer Date, [*] on the Region Three Transfer Date, and [*] 
on the Region Four Transfer Date, subject to the provisions of subparagraphs 
(b) and (c) below;

                              (b)  if prior to any Transfer Date after the
Region One Transfer Date,  ActaMed issues Qualified Preferred Stock, the Series
D Price on such Transfer Date shall be the Per Share Issue Price of such
Qualified Preferred Stock, and the Series D Price shall 

[*] CONFIDENTIAL TREATMENT REQUESTED

                                    -4-
<PAGE>


thereafter remain constant for all subsequent Transfer Dates unless adjusted 
(i) in accordance with this provision, upon a subsequent issuance of 
Qualified Preferred Stock or (ii) in accordance with subparagraph (c) below; 
or

                              (c)  notwithstanding anything to the contrary in
this Section 1.6.1, if, on any Applicable Transfer Date, ActaMed has achieved
less than [*] of the revenues for the cumulative months or
quarters (as may be applicable based on the detail required for the New Business
Plan) prior to such Applicable Transfer Date as set forth in the New Business
Plan, then the Series D Price shall revert to [*] and

                    1.6.2     after ActaMed's initial Public Offering, if a
Transfer Date occurs at least thirty (30) trading days after the effective date
of such Public Offering, the average for such 30 days of (i) the mean between
the reported high and low sales prices for ActaMed Common Stock on each such
trading day, or (ii) if no sales are reported on any such trading day, the mean
between the bid and offered prices for ActaMed Common Stock on such trading day;
or, if the Transfer Date occurs prior to the 30th day following such initial
Public Offering (including the initial day of trading when computing the number
of days), the initial offering price for ActaMed Common Stock in such initial
Public Offering less the amount of any underwriters' discounts or commissions on
a per share basis, as set forth in the effective registration statement.

                    1.6.3     For purposes of Section 1.6, "Qualified Preferred
Stock" shall mean shares of ActaMed's preferred stock issued in an arm's length
transaction to one or more purchasers who are not ActaMed stockholders as of the
Region One Transfer Date for an aggregate purchase price of not less than
$7,000,000; and the "Per Share Issue Price" of such Qualified Preferred Stock
shall be the consideration per equivalent share of Common Stock received by
ActaMed for the Qualified Preferred Stock, adjusted backwards to the Region One
Transfer Date for any subdivision or combination of shares of ActaMed capital
stock or similar change in ActaMed's capital structure (whether by stock split,
stock dividend, merger, share exchange, consolidation or otherwise) since the
Region One Transfer Date.

     SECTION 1.7    PURCHASE PRICE ADJUSTMENT.  SBCL shall transfer all of 
the SCAN Assets located in Region Three on the Region Three Transfer Date.  
In the event that, by [*] SBCL has not provided [*] to ActaMed [*] described 
in [*] of the Services Agreement, [*] to [*] by [*].  In such case, if, 
subsequent to [*] SBCL provides [*] ActaMed shall [*] that SBCL [*] 
pursuant to this provision [*].

     SECTION 1.8    NUMBER OF SITES ADJUSTMENT.  On any Transfer Date other 
than the Region One Transfer Date, if the aggregate number of SBCL Sites 
located in the Regions which were previously transferred to ActaMed in 
accordance herewith, plus the aggregate number of SBCL Sites located in 
Regions then being or subsequently to be transferred to ActaMed, is less than 
[*] then the portion of the Purchase Price 

[*] CONFIDENTIAL TREATMENT REQUESTED


                                   -5-
<PAGE>


otherwise payable on such Transfer Date shall be reduced to an amount equal 
to the portion of the Purchase Price otherwise then payable times a fraction 
the numerator of which shall be the number of SBCL Sites to be transferred on 
such Transfer Date, and the denominator of which shall be [*] MINUS the 
number of SBCL Sites transferred on previous Transfer Dates, and MINUS the 
number of SBCL Sites located in Regions subsequently to be transferred; 
PROVIDED that no such adjustment shall be made if such fraction is [*] or 
more.

                               ARTICLE 2   

                               CLOSINGS

     SECTION 2.1    INITIAL CLOSING.  Conveyance of SCAN Assets in each of the
Regions by SBCL to ActaMed shall take place as set forth in this Article Two. 
Concurrently with the execution and delivery of this Assets Purchase Agreement,
SBCL and ActaMed have executed and delivered the License Agreement, the First
Amendment to the Development Agreement, the Services Agreement, the Third
Amendment to the Stockholders Agreement, the Third Amendment to the Registration
Rights Agreement, the Standstill Agreement, and such other documents as the
parties have reasonably requested, each of which shall be effective as of the
Region One Transfer Date.  In addition, effective on or before such date,
ActaMed shall file in the office of the Secretary of State of Georgia its Fourth
Amended Articles.

     SECTION 2.2    STAGING OF THE TRANSACTIONS.

                    2.2.1     The parties shall effect the transfer of the SCAN
Assets in as orderly a manner as possible and with minimal disruption to
Automated Providers.  This Assets Purchase Agreement provides benchmarks that
will be used by the parties to measure the degree to which the transfer is
orderly and without disruption and provides steps the parties will take if the
benchmarks are not met to improve the transition process.  Provided the
benchmarks are satisfied, the parties intend that all of the transfers be
completed as quickly as possible and that targeted transfer dates may be
accelerated in such circumstances.

                    2.2.2     At any time, upon not less than fifteen (15) days
written notice by SBCL to ActaMed, except to the extent a shorter period is
provided for in Section 2.2.3 hereof, SBCL shall in its sole discretion have the
right to accelerate the Region Two Transfer Date, the Region Three Transfer Date
or the Region Four Transfer Date to a date immediately after expiration of such
notice period (the "ACCELERATED TRANSFER DATE").  In such case, the transactions
contemplated by Sections 1.5.3, 1.5.4 and 1.5.5 above shall take place on such
Accelerated Transfer Date, in the manner specified in Sections 2.5 and 2.6
below, subject to the other terms and conditions of this Assets Purchase
Agreement.

                    2.2.3     In the event of any proposed issuance of Qualified
Preferred Stock, ActaMed shall provide SBCL with notice of its intent to
consummate such a transaction not less 

[*] CONFIDENTIAL TREATMENT REQUESTED


                                     -6-
<PAGE>


than forty-five (45) days prior to doing so, and shall provide SBCL notice of 
an affirmative obligation to issue Qualified Preferred Stock not less than 
fifteen (15) days prior to issuance.  In such event, SBCL shall in its sole 
discretion have the right to notify ActaMed and cause one or more Accelerated 
Transfer Dates to occur thirty (30) days after the giving of such notice, 
and, if SBCL so designates, conditioned upon the occurrence of the proposed 
sale of Qualified Preferred Stock.  The number of shares Series D Preferred 
Stock issued to SBCL on any such Accelerated Transfer Date(s) shall be 
calculated as if such Accelerated Transfer Date(s) occurred prior to the 
closing of the sale of such Qualified Preferred Stock.

     SECTION 2.3    REGIONS TO BE TRANSFERRED.

                    2.3.1     The SCAN Assets located in Region One will be
transferred to ActaMed on the Region One Transfer Date.  The parties will
cooperate to identify and resolve any problems that arise after the transfer of
such SCAN Assets to ActaMed.

                    2.3.2     Provided that the applicable Transfer Benchmarks
have been met for Region One Sites, and subject to SBCL's rights under Section
2.2.2 hereof, the SCAN Assets located in Region Two will be transferred to
ActaMed three (3) months after the Region One Transfer Date (the "REGION TWO
TRANSFER DATE").  ActaMed shall notify SBCL's Relationship Manager that it is in
compliance with the Transfer Benchmarks and wishes to close the transfer of the
SCAN Assets located in Region Two fifteen (15) days prior to the scheduled
Region Two Transfer Date.  SBCL shall have seven (7) days to respond to
ActaMed's notice, indicating that SBCL either (i) will close the transfer on the
scheduled Region Two Transfer Date or (ii) that ActaMed's operations relative to
the Region One Sites fail to meet the Transfer Benchmarks.  If SBCL determines
that ActaMed's operations relative to the Region One Sites fail to meet the
Transfer Benchmarks to allow for the transfer of SCAN Assets located in Region
Two, the provisions of Section 2.4 will apply.  The parties will cooperate to
identify and resolve any problems that arise after the transfer of the SCAN
Assets located at Region Two Sites to ActaMed.

                    2.3.3     Provided that the applicable Transfer Benchmarks
have been met for Region One Sites and Region Two Sites on and after the Region
Two Transfer Date, and subject to SBCL's rights under Section 2.2.2 hereof, the
SCAN Assets located in Region Three will be transferred to ActaMed three (3)
months after the Region Two Transfer Date (the "REGION THREE TRANSFER DATE"). 
ActaMed shall notify SBCL's Relationship Manager that it is in compliance with
the Transfer Benchmarks and wishes to close the transfer of the SCAN Assets
located in Region Three fifteen (15) days prior to the scheduled Region Three
Transfer Date.  SBCL shall have seven (7) days to respond to ActaMed's notice,
indicating that SBCL either (i) will close the transfer on the scheduled Region
Three Transfer Date or (ii) that ActaMed's operations relative to the Region One
Sites and Region Two Sites fail to meet the Transfer Benchmarks.  If SBCL
determines that ActaMed's operations relative to the Region One Sites and Region
Two Sites fail to meet the Transfer Benchmarks to allow for the transfer of SCAN
Assets located in Region Three, the provisions of Section 2.4 will apply.  The
parties will 


                                       -7-
<PAGE>

cooperate to identify and resolve any problems that arise after the transfer 
of the SCAN Assets located at Region Three Sites to ActaMed.

                    2.3.4     Provided that the applicable Transfer Benchmarks
have been met for Region One Sites, Region Two Sites and Region Three Sites on
and after the Region Three Transfer Date, and subject to SBCL's rights under
Section 2.2.2 hereof, the SCAN Assets located in Region Four will be transferred
to ActaMed three (3) months after the Region Three Transfer Date (the "REGION
FOUR TRANSFER DATE").  ActaMed shall notify SBCL's Relationship Manager  that it
is in compliance with the Transfer Benchmarks and wishes to close the transfer
of the SCAN Assets located in Region Four fifteen (15) days prior to the
scheduled Region Four Transfer Date.  SBCL shall have seven (7) days to respond
to ActaMed's notice, indicating that SBCL either (i) will close the transfer on
the scheduled Region Four Transfer Date or (ii) that ActaMed's operations
relative to the Region One Sites, Region Two Sites and Region Three Sites fail
to meet the Transfer Benchmarks.  If SBCL determines that ActaMed's operations
relative to the Region One Sites, Region Two Sites and Region Three Sites fail
to meet the Transfer Benchmarks to allow for the transfer of SCAN Assets located
in Region Four, the provisions of Section 2.4 will apply. The parties will
cooperate to identify and resolve any problems that arise after the transfer of
the SCAN Assets located at Region Four Sites to ActaMed.

     SECTION 2.4    PROCEDURES APPLICABLE IF TRANSFER BENCHMARKS ARE NOT MET. 
If, prior to any scheduled Transfer Date after the Region One Transfer Date,
SBCL determines that ActaMed has failed to meet the requisite Transfer
Benchmarks, ActaMed shall, on or prior to five (5) business days following the
scheduled Transfer Date, either (i) submit a written remediation plan to SBCL
detailing the steps required to accomplish such Transfer Benchmarks and the
means to achieving  such steps, or (ii) notify SBCL, in writing, that ActaMed
believes the failure to meet such Transfer Benchmarks is for reasons beyond the
control of ActaMed, including without limitation, a failure by SBCL to perform
in accordance with the terms and conditions of the Services Agreement.  Within
ten (10) business days following receipt of such a remediation plan or notice,
SBCL shall make a determination, considering available resources and the
contents of the plan or notice, as to whether the problem is remediable within a
reasonable period of time.  If SBCL determines that the problem is remediable as
aforesaid, it shall set a date not less than thirty (30) nor more than ninety
(90) days from the scheduled Transfer Date as a measurement date (the
"Measurement Date") for satisfaction of the applicable Transfer Benchmarks.  If
SBCL determines that the applicable Transfer Benchmarks are met on or before the
Measurement Date, then the original Transfer Date shall be reset for a date
immediately following the date which is ten (10) days after such applicable
Transfer Benchmarks were met, and on which date such applicable Transfer
Benchmarks continue to be met.  If ActaMed disagrees with SBCL's determination
as to whether the problem is remediable, the dispute shall be resolved pursuant
to the provisions of Article IX hereof.  If a Transfer Date is extended or reset
hereunder, all subsequent Transfer Dates will be rescheduled, subject to this
Section 2.4, at three (3) month intervals after the extended or reset Transfer
Date.


                                    -8-

<PAGE>

     SECTION 2.5    DELIVERIES BY SBCL AT EACH OF THE TRANSFER DATES.  At each
of the Transfer Dates, SBCL shall execute and deliver to ActaMed the following
documents to the extent relating to the SCAN Assets in the Region being
transferred:

                    2.5.1     a Bill of Sale and Assignment (in the form
attached as EXHIBIT 2.5.1) covering the SCAN Assets for the Region being
transferred;

                    2.5.2     an SBCL Compliance Certificate (in the form
attached as EXHIBIT 2.5.2) pursuant to which SBCL will make the representations
and warranties as to itself and the SCAN Assets in the Region being transferred
contained in Section 3.1 hereof (other than the representations and warranties
contained in Sections 3.1.3, 3.1.4(a)-(e), 3.1.6(d) and 3.1.7(b), which shall be
made only on the Region One Transfer Date), which certificate shall attach
revised Disclosure Schedules to the extent necessary to make the representations
and warranties made on such Transfer Date (with the exceptions noted above) true
and correct in all material respects; PROVIDED that to the extent that any such
representation and warranty is dependent upon information provided by
Transferred Employee or other people employed by ActaMed, such representations
and warranties shall be given only to the best of SBCL's knowledge;

                    2.5.3     an SBCL Secretary's Certificate (in the form
attached as EXHIBIT 2.5.3);

                    2.5.4     any other consents or waivers obtained pursuant to
Section 7.1.5 covering the Region transferred, including consents to the
assignment and assumption of each of the Vendor Contracts applicable to the SCAN
Assets in the Region that ActaMed is assuming;

                    2.5.5     all of the books and records, including but not
limited to, books of account, leases, contracts, and customer lists, of SBCL
relating exclusively to the SCAN Assets for the Region transferred; and

                    2.5.6     such other documents or certificates as may be
reasonably requested by ActaMed.

     SECTION 2.6    DELIVERIES BY ACTAMED AT EACH OF THE TRANSFER DATES.  At
each of the Transfer Dates, ActaMed shall execute and deliver to SBCL the
following documents to the extent relating to the Region being transferred:

                    2.6.1     the applicable number of shares of Series D
Preferred Stock, as determined in accordance with Sections 1.5, 1.6 and 1.8 of
this Assets Purchase Agreement;

                    2.6.2     an Assumption Agreement (in the form attached
hereto as EXHIBIT 2.6.2) covering, for the Region transferred, (i) the Vendor
Contracts for the Region transferred, (ii) the Phone Lines and (iii) the
Provider Agreements for the Region transferred;


                                    -9-
<PAGE>

                    2.6.3     an ActaMed Compliance Certificate (in the form
attached hereto as EXHIBIT 2.6.3), pursuant to which ActaMed will make the
representations and warranties contained in Section 3.2 hereof, which
certificate shall attach revised Disclosure Schedules to the extent necessary to
make the representations and warranties made on such Transfer Date true and
correct in all material respects;

                    2.6.4     an ActaMed Secretary's Certificate (in the form
attached hereto as EXHIBIT 2.6.4); and

                    2.6.5     such other documents or certificates as may be
reasonably requested by SBCL.

     SECTION 2.7    PRORATIONS.  All amounts previously paid or payable with 
respect to the items identified on Schedule 2.7, or for any other items 
reflecting actual costs incurred solely in connection with the provision of 
Lab EDI Services which are to be prorated on the basis of days, for or in 
respect of periods which straddle any Transfer Date shall be apportioned on a 
pro rata basis based on the respective number of days in the pre-Transfer 
Date and post-Transfer Date periods.

     SECTION 2.8    NON-TRANSFERABLE ASSETS.

                    2.8.1     To the extent that any SCAN Asset which would
otherwise be transferred on an Applicable Transfer Date (a "TRANSFERRED ASSET")
is not capable of being sold, assigned, transferred, conveyed or delivered
without obtaining a Required Consent, or if such sale, assignment, transfer,
conveyance or delivery or attempted sale, assignment, transfer, conveyance or
delivery would constitute a violation of any Contract or License constituting or
relating specifically to a Transferred Asset, or a violation of any Regulation,
or would result in the imposition of any significant additional Liability or
obligation on SBCL or ActaMed, or a substantial diminution in the value or use
of such Transferred Asset, this Assets Purchase Agreement shall not constitute a
sale, assignment, transfer, conveyance or delivery of such Transferred Asset or
an attempted sale, assignment, transfer, conveyance or delivery thereof, nor
shall it constitute an assumption of any Liability under any Contract or License
constituting or relating specifically to such Transferred Asset.  Any such
Transferred Asset and any Contract or License which constitutes or relates
exclusively to any such Transferred Asset or Assets shall be a "NON-TRANSFERABLE
ASSET".  SBCL shall use its best efforts, and ActaMed shall reasonably cooperate
therein, to provide ActaMed with the benefit of any such Non-Transferable Asset.

                    2.8.2     Anything in this Assets Purchase Agreement to the
contrary notwithstanding, SBCL shall not be obligated to sell, assign, transfer,
convey or deliver, or cause to be sold, assigned, transferred, conveyed or
delivered to ActaMed, and ActaMed shall not be obligated to purchase or assume,
any Non-Transferable Asset without first having obtained all Required Consents
or prevented the imposition of such Liability or obligation or diminution in
value or use.  Both before and after the Applicable Transfer Date, SBCL and
ActaMed shall use their collective best efforts to obtain any Required Consents
or to prevent the imposition of any


                                    -10-
<PAGE>

such Liability or obligation or any such diminution in value or use so as to 
transfer each such Non-Transferable Asset to ActaMed without adversely 
modifying, amending or burdening such Non-Transferable Asset.  Any costs 
associated with such efforts shall be borne by SBCL.

                    2.8.3     To the extent that on a given Transfer Date, there
is any Non-Transferable Asset, SBCL shall, from and after such Transfer Date,
cooperate with ActaMed in any reasonable and lawful arrangement designed to
provide the benefit of such Non-Transferable Asset to ActaMed, and ActaMed, so
long as such benefit is so provided, shall satisfy or perform any Liability
under or in connection with such Non-Transferable Asset which would be a
Liability assumed by ActaMed if such Non-Transferable Asset were a Transferred
Asset.  Any costs associated with such efforts shall be borne by SBCL.

                    2.8.4     At any time after a given Transfer Date, if any
Non-Transferable Asset becomes capable of being sold, assigned, transferred,
conveyed or delivered to ActaMed without a violating any Contract, License or
Regulation or resulting in the imposition of any significant additional
Liability or obligation on SBCL or ActaMed or a substantial diminution in the
value or use of such Asset, then, at such time, such Non-Transferable Asset
shall be deemed to have been sold, assigned, transferred, conveyed and delivered
to ActaMed effective as of the Applicable Transfer Date hereof pursuant to the
execution and delivery of a Bill of Sale and Assignment and an Assumption
Agreement with respect to the Transferred Assets on such Applicable Transfer
Date; PROVIDED, HOWEVER, that if and to the extent that SBCL has theretofore
provided ActaMed with comparable assets or compensation for such Asset, an
equitable adjustment shall be made between SBCL and ActaMed to effectuate fully
the intent of the foregoing provision.


                                      ARTICLE 3   

                            REPRESENTATIONS AND WARRANTIES


     SECTION 3.1    BY SBCL.  Except as set forth on a Disclosure Schedule
hereto, SBCL hereby represents and warrants to ActaMed, and shall (except as
contemplated by Section 2.5.2 hereof) represent and warrant to ActaMed on each
Transfer Date as to itself and the SCAN Assets being transferred on such
Transfer Date, as follows:

                    3.1.1     CAPACITY AND VALIDITY.  SBCL has the full power
and corporate authority necessary to enter into and perform its obligations
under this Assets Purchase Agreement and the other documents to be executed and
delivered by SBCL hereunder or in connection herewith (the "SBCL DOCUMENTS") and
to consummate the transactions contemplated hereby and thereby.  This Assets
Purchase Agreement and all other SBCL Documents have been or will be duly
executed and delivered by SBCL, and constitute or will constitute the legal,
valid and binding obligations of SBCL, enforceable in accordance with their
respective terms except as enforceability may be limited by applicable equitable
principles, or by bankruptcy, insolvency, reorganization, moratorium or similar
laws from time to time in effect


                                    -11-
<PAGE>

affecting the enforcement of creditors' rights generally.   The execution, 
delivery and performance of this Assets Purchase Agreement or any other SBCL 
Document, and the consummation of the transactions contemplated hereby or 
thereby, will not violate any provisions of the articles of incorporation or 
bylaws of SBCL, or any Regulation or Court Order to which SBCL is subject.

                    3.1.2     ORGANIZATION, GOOD STANDING AND FOREIGN
QUALIFICATION.  SBCL is a corporation duly incorporated, validly existing and in
good standing under the laws of Delaware, and has the corporate power and
authority to carry on its business in such places as it has been and is now
being conducted, and to own and lease the properties and assets which it now
owns or leases, in each case in connection with its provision of Lab EDI
Services.

                    3.1.3     PROJECTIONS.

                              (a)  The aggregate costs reflected by the line 
items [*] attached hereto as DISCLOSURE SCHEDULE 3.1.3 (the "PROJECTIONS") 
are accurate in all material respects and do not omit to state any material 
fact required to be stated therein to make such Projections not misleading; 
PROVIDED that such Projections are indicative only of general expenses 
(excluding one-time or transactional expenses, which include any expenses 
incurred with respect to this transaction) for [*] projected to be incurred 
in connection with SBCL's provision of Lab EDI Services to [*] SCAN Sites and 
assume that ActaMed will provide services to only such number of SCAN Sites 
and only in the same manner that SBCL did prior to transfer.

                              (b)  The Projections were prepared in accordance
with the books and records of SBCL in all material respects, which books and
records have been properly maintained and are complete and correct in all
material respects.

                              (c)  SBCL has not received any advice or
notification from its independent certified public accountants that SBCL has
used any improper accounting practice that would have the effect of not
reflecting or incorrectly reflecting in the Projections any expenses associated
with SBCL's provision of Lab EDI Services.

                    3.1.4     ABSENCE OF CHANGES.  Except as contemplated by
this Assets Purchase Agreement, since December 1, 1997, SBCL's provision of Lab
EDI Services has been carried on only in the ordinary course of SBCL's business,
and there has not been any transaction or occurrence in which SBCL has:

                              (a)  suffered or experienced any event or
condition materially increasing the expenses incurred by SBCL in the provision
of Lab EDI Services;

[*] CONFIDENTIAL TREATMENT REQUESTED


                                    -12-
<PAGE>

                              (b)  increased the rate of compensation payable or
to become payable by it to any of the Transferred Employees or agreed to do so,
except general hourly rate increases, normal merit increases and increases due
to promotions;

                              (c)  failed to provide notice to ActaMed that it
hired or committed to hire any Person who will perform services directly
relating to SBCL's provision of Lab EDI Services, or terminated or received the
resignation of any Transferred Employee;  

                              (d)  through negotiation or otherwise, made any
commitment or incurred any Liability, whether or not enforceable, to any labor
organization affecting Transferred Employees;

                              (e)  directly or indirectly paid or entered into a
Contract to pay any severance or termination pay to any Transferred Employee; 

                              (f)  experienced problems with the SCAN Network 
or [*] (as defined in the Services Agreement) (such as network operations, 
quality assurance or software development problems) which have materially and 
adversely affected SBCL's provision of Lab EDI Services to SBCL Sites in 
Regions not yet transferred to ActaMed pursuant to this Assets Purchase 
Agreement.

                    3.1.5     REAL PROPERTY.  SBCL neither owns nor leases
(either as lessee or lessor) any real property related exclusively to its
provision of Lab EDI Services. 

                    3.1.6     PERSONAL PROPERTY.

                              (a)  SBCL owns and has good title to the SCAN
Assets, free and clear of any and all Liens of any kind or nature.

                              (b)  DISCLOSURE SCHEDULE 3.1.6 contains  (i) a
sample configuration of a PC System which is representative of PC Systems
provided to Automated Providers by SBCL for the provision of Lab EDI Services,
and (ii) a list of the SCAN Assets in the Region being transferred, which list
is true and complete in all material respects to the best of SBCL's knowledge. 

                              (c)  SBCL does not lease any equipment, machinery
or other items of tangible personal property for use exclusively in the
provision of Lab EDI Services.  SBCL does not lease any personal property as
lessor in connection with its provision of Lab EDI Services.

                              (d)  As of the Region One Transfer Date, there 
are not less than [*] SBCL Sites located in all Regions.

[*] CONFIDENTIAL TREATMENT REQUESTED

                                    -13-
<PAGE>

                    3.1.7     COMPLIANCE WITH LAWS.

                              (a)  To the best knowledge of SBCL, in its
provision of Lab EDI Services, SBCL has complied in all material respects with
all applicable Regulations relating to the provision of Lab EDI Services.

                              (b)  To the best knowledge of SBCL, the SCAN
Software complies as of the Region One Transfer Date with all applicable
Regulations relating to SBCL's provision of Lab EDI Services.

                              (c)  SBCL has obtained all consents or approvals
required from, has made all necessary filings with, and has provided all
required notices to, any governmental body or agency or any other third party in
connection with the execution and delivery of this Assets Purchase Agreement or
any of the SBCL Documents.

                    3.1.8     LITIGATION AND CLAIMS.  There are no outstanding
Court Orders or quasi-judicial or administrative decisions to which SBCL is
subject relating to the SCAN Assets located at SBCL Sites and there is no
Litigation pending or, to SBCL's knowledge, threatened relating to (i) the SCAN
Assets located at SBCL Sites or (ii) SBCL's provision of Lab EDI Services.  SBCL
has not been advised by any attorney representing it that there are any "loss
contingencies" (as defined in FASB 5), which would be required by FASB 5 to be
disclosed or accrued in SBCL's financial statements by reason of the Lab EDI
Services provided by SBCL.

                    3.1.9     CONTRACTS AND COMMITMENTS; WARRANTIES.

                              (a)  DISCLOSURE SCHEDULE 3.1.9 contains, to the
best knowledge of SBCL, a list, which is true and correct in all material
respects, of all Vendor Contracts and all Contracts to which SBCL is a party
solely because it provides Lab EDI Services using the SCAN Network, except for
Contracts (other than Vendor Contracts) that (i) are terminable on thirty (30)
days or less notice by SBCL without any Liability, (ii) are described in any
other Section of the Disclosure Schedule hereto, or (iii) do not require
payments in excess of $5,000 in the aggregate following the date hereof (unless
renewed which renewal is at the discretion of ActaMed).

                              (b)  Each of the Contracts listed in DISCLOSURE
SCHEDULE 3.1.9, or described in this Section 3.1.9, is in full force and effect.
No Default by SBCL under any of the terms or conditions set forth in any of the
Contracts to which SBCL is a party or any document or instrument related thereto
has occurred or been asserted by any party which could result in acceleration of
any obligations under or termination of the Contract.  The execution, delivery
and performance of this Assets Purchase Agreement or any other SBCL Document,
and the consummation of the transactions contemplated hereby or thereby, will
not conflict with, result in a breach of, or constitute a Default under any
Contract to which SBCL is a party or by which it is bound, affect the
continuation, validity and effectiveness of any of such Contracts, or any terms
thereof, or result in the creation of any Lien upon any of the SCAN Assets
located at SBCL Sites, or result in the acceleration of the maturity of any
payment date of any of SBCL's


                                    -14-
<PAGE>

obligations, or increase or adversely affect the obligations of SBCL 
thereunder.  SBCL has provided, upon request, true, correct and complete 
copies of the Contracts referred to in DISCLOSURE SCHEDULE 3.1.9 to ActaMed 
for review.

                    3.1.10    CONDITION OF ASSETS.  To the best of SBCL's
knowledge, the PC Systems located at SBCL Sites in a Region to be transferred on
an Applicable Transfer Date are in good operating condition so as to allow, in
the aggregate, a level of connectivity with the SCAN Network which is consistent
with SBCL's historically experienced level of connectivity.  No representation
or warranty is hereby given as to the condition or state of repair of any
individual component of a PC System.

                    3.1.11    BROKERS AND FINDERS.  No third party is entitled
to receive any commission, fees or similar consideration in connection with the
transactions contemplated by this Assets Purchase Agreement based on any
arrangement or agreement made by or on behalf of SBCL.


                    3.1.12    INVESTMENT REPRESENTATIONS; LEGEND ON SHARES.

                              (a)  SBCL hereby acknowledges that (i) the shares
of Series D Preferred Stock (or, if applicable, Conversion Shares) delivered
pursuant to this Assets Purchase Agreement have not been registered under the
Securities Act, and the resale of such shares is therefore subject to
restrictions imposed by federal and state securities laws including without
limitation that such shares cannot be sold or otherwise disposed of except in a
transaction which is registered under the Securities Act or exempted from
registration; (ii) ActaMed has advised SBCL, a reasonable time prior to the
execution of this Assets Purchase Agreement, that the shares have not been
registered under the Securities Act; and (iii) all certificates representing the
shares delivered to SBCL shall be stamped or otherwise imprinted with a legend
substantially in the following form (together with any other legend required by
state law), and that stop transfer orders will be given to ActaMed's transfer
agent:

               "THESE SECURITIES HAVE NOT BEEN REGISTERED
               UNDER THE SECURITIES ACT OF 1933 OR ANY STATE
               SECURITIES ACTS AND MAY NOT BE TRANSFERRED OR
               OTHERWISE DISPOSED OF UNLESS THEY HAVE BEEN
               REGISTERED UNDER THE SECURITIES ACT OF 1933 AND
               ANY APPLICABLE STATE SECURITIES ACTS OR
               EXEMPTIONS FROM SUCH REGISTRATIONS ARE
               AVAILABLE."

                              (b)  SBCL is an accredited investor (as such term
is defined in Rule 506 of Regulation D promulgated by the SEC) and is acquiring
the shares of Series D Preferred Stock (and, if applicable, Conversion Shares)
for its own account for investment purposes only, and not with a view to the
distribution, transfer, or assignment of the same in whole or in part.  SBCL has
been represented by counsel and advisers, each of whom has been


                                    -15-
<PAGE>


previously selected by SBCL, as SBCL has found necessary to consult 
concerning this Assets Purchase Agreement and the shares to be issued 
pursuant to this Assets Purchase Agreement.  SBCL, either alone or with its 
representative(s), has such knowledge and experience in financial or business 
matters that it is capable of evaluating the merits and risks of the 
prospective investment.  SBCL and its counsel and other advisers have been 
provided with such information concerning ActaMed as they have deemed 
relevant with respect to SBCL's investment decision relating to the shares 
being delivered to it.  SBCL has had a reasonable opportunity to ask 
questions and receive answers concerning the terms and conditions of the 
transactions contemplated by this Assets Purchase Agreement, to discuss 
ActaMed's business, management and financial affairs with the management of 
ActaMed, and to obtain any additional information which ActaMed possesses or 
can acquire without unreasonable effort or expense that is necessary to 
verify the accuracy of the information furnished.  SBCL has received 
satisfactory responses from management of ActaMed to SBCL's inquiries.

                    3.1.13    THIRD PARTY SOFTWARE.  SBCL has sufficient rights
and licenses in Third Party Software to convey the rights contemplated by
Section 1.2 hereof, free and clear of any liens, claims or encumbrances, in each
case subject to the exclusions and limitations expressly set forth in Section
1.2 hereof.

                    3.1.14    SCHEDULES.  All Sections of the Disclosure
Schedule referenced in this Section 3.1 are true, correct and complete as of the
date of this Assets Purchase Agreement, and will be true, correct and complete
as of each Transfer Date.  Matters disclosed in each such Section of the
Disclosure Schedule shall be deemed disclosed for purposes of the matters to be
disclosed in any Section of the Disclosure Schedule.

     SECTION 3.2    BY ACTAMED.  Except as set forth on a Disclosure Schedule
hereto, ActaMed hereby represents and warrants to SBCL, and will represent and
warrant to SBCL on each Transfer Date, as follows:

                    3.2.1     ORGANIZATION, GOOD STANDING AND AUTHORITY. 
ActaMed is a duly organized and validly existing corporation in good standing
under the laws of the State of Georgia and has full corporate power and
authority to carry on its business, to own and operate its properties and
assets, and to consummate the transactions contemplated by this Assets Purchase
Agreement and the other documents to be executed and delivered by ActaMed
hereunder (the "ACTAMED DOCUMENTS").  ActaMed is currently engaged in the
ActaMed Business and is qualified to do business as a foreign corporation in
each jurisdiction in which the failure to be so qualified would have a Material
Adverse Effect.  The Fourth Amended Articles have been duly filed and are
currently in effect.  ActaMed has delivered to SBCL true, correct and complete
copies of the Fourth Amended Articles and the bylaws of ActaMed, including all
amendments thereto, as presently in effect.  ActaMed has all governmental
licenses, authorizations, consents and approvals required to carry on the
ActaMed Business as now conducted and as proposed to be conducted and to own,
operate and lease its properties and


                                    -16-
<PAGE>


assets, except for those licenses, authorizations, consents and approvals the 
failure of which to have would not have a Material Adverse Effect.

                    3.2.2     AUTHORIZATION OF AGREEMENT, NO BREACH.  The
execution and delivery of this Assets Purchase Agreement have been duly
authorized by all necessary corporate action on the part of ActaMed, and no
further corporate action of any nature is required pursuant to the Articles or
the bylaws of ActaMed.  All Persons who have executed or will execute this
Assets Purchase Agreement, or any other agreement or document called for by this
Assets Purchase Agreement on behalf of ActaMed have been duly authorized to do
so by all necessary corporate action.  This Assets Purchase Agreement and the
other ActaMed Documents have been duly executed and delivered by ActaMed and
constitute legal, valid and binding obligations of ActaMed, enforceable against
ActaMed in accordance with their respective terms, except as enforceability may
be limited by applicable equitable principles, or by bankruptcy, insolvency,
reorganization, moratorium or similar laws from time to time in effect affecting
the enforcement of creditors' rights generally.  The execution, delivery and
performance of this Assets Purchase Agreement and the other ActaMed Documents
and the consummation of the transactions contemplated hereby and thereby will
not (1) violate or result in a breach of or Default or acceleration under the
Articles or the bylaws of ActaMed or any material contract to which ActaMed is a
party or is bound, (2) violate any Court Order, quasi-judicial or administrative
decision or award of any court, arbitrator, mediator, tribunal, administrative
agency or governmental body applicable to or binding upon ActaMed or upon the
securities, property or business of ActaMed or (3) violate any Regulation
relating to ActaMed, or to the securities, property, or business of ActaMed.

                    3.2.3     ACTAMED FINANCIAL STATEMENTS.

                              (a)  DISCLOSURE SCHEDULE 3.2.3 hereto contains a
true and correct copy of (i) the balance sheets of ActaMed at December 31, 1995
and December 31, 1996 and the statements of operations, statements of
stockholders equity and statements of cash flows of ActaMed for the years ended
December 31, 1995 and December 31, 1996, which have been audited by Deloitte &
Touche, LLP independent accountants (the "ACTAMED FINANCIAL STATEMENTS"),  and
(ii) the unaudited balance sheets of ActaMed at September 30, 1997 and the
statements of operations, statements of stockholders equity and statements of
cash flows of ActaMed for quarter ended September 30, 1997 (the "ACTAMED
UNAUDITED STATEMENTS").

                              (b)  The ActaMed Financial Statements have been
prepared in accordance with GAAP applied on a consistent basis during the
respective periods covered thereby.  The ActaMed Financial Statements are
correct and complete and present fairly in all material respects the financial
position of ActaMed at the date of the balance sheets included therein and the
results of operations and cash flows of ActaMed for the respective periods
covered by the statements of operations and cash flows included therein. 
ActaMed has no material obligations or liabilities of any nature whatsoever
(whether absolute, accrued, contingent or otherwise and whether due or not due)
which would be required by GAAP to be


                                    -17-
<PAGE>

disclosed in the ActaMed Financial Statements and which, either individually 
or in the aggregate, would have a Material Adverse Effect and which are not 
disclosed by the ActaMed Financial Statements.

                              (c)  The ActaMed Unaudited Statements have been
prepared in reasonable detail and in accordance with GAAP applied consistently
throughout the periods reflected therein (except as otherwise disclosed therein)
and certified by the chief financial officer of ActaMed as presenting fairly the
financial condition and results of operations of ActaMed and any of its
Subsidiaries for the periods covered by the statements (subject to customary
exceptions for interim unaudited financial statements).

                    3.2.4     CONSENTS.  No consent, approval or authorization
of, or qualification, designation, declaration or filing with, or notice to any
governmental authority on the part of ActaMed is required in connection with (a)
the valid execution and delivery of the ActaMed Documents and (b) the issuance
of the shares of Series D Preferred Stock (and, if applicable, the Conversion
Shares), except the filing of the Fourth Amended Articles in the office of the
Secretary of State of the State of Georgia, which filing will be accomplished
concurrently with the execution and delivery of this Assets Purchase Agreement.

                    3.2.5     CAPITALIZATION.

                              (a)  After giving effect to the authorization of
the shares of Series D Preferred Stock, the capital stock of ActaMed, as
authorized by its Articles consists of the authorized, issued and outstanding
capital stock set forth on DISCLOSURE SCHEDULE 3.2.5.  None of such issued
shares is held in the treasury of ActaMed.  ActaMed does not have outstanding
any stock or securities convertible into or exchangeable for any shares of its
capital stock and no Person has any right against ActaMed to subscribe for or to
purchase, or any options for the purchase, or any agreements providing for the
issuance, of any capital stock or any stock or securities convertible into
capital stock of ActaMed.
                              (b)  All of the issued and outstanding shares 
of ActaMed capital stock have been validly issued and are fully paid and 
non-assessable.  The shares of Series D Preferred Stock, when issued to SBCL 
pursuant to this Assets Purchase Agreement, will be validly issued, fully 
paid and nonassessable, will have the designations, preferences, limitations, 
and relative rights set forth in the Articles and will be free and clear of 
all liens, claims and encumbrances.  Any and all of the Conversion Shares, 
when issued, will be validly issued, fully paid and nonassessable.

                    3.2.6     REGISTRATION RIGHTS.  Except as set forth in the
Registration Rights Agreement, ActaMed will not be under any obligation to
register under the Securities Act any of its then outstanding securities or any
of its securities which may thereafter be issued.

                    3.2.7     OFFERING.  Subject to the accuracy of
representations and warranties by SBCL in Section 3.1 hereof, the issuance of
the shares of Series D Preferred Stock (and the


                                    -18-
<PAGE>

issuance of the Conversion Shares) on the Applicable Transfer Date 
constitutes a transaction exempt from the registration requirements of 
Section 5 of the Securities Act, and from the qualification requirements of 
any applicable state securities or "blue sky" laws.

                    3.2.8     CHANGES.  Since the date of the latest ActaMed
Unaudited Statements, there has not been (i) any adverse change in the assets,
liabilities, financial condition or operations of the ActaMed Business from that
reflected in the ActaMed Financial Statements, other than changes in the
ordinary course of business, none of which individually or in the aggregate has
had a Material Adverse Effect or (ii) any adverse change in the prospects of the
ActaMed Business or any other event or condition (or events or conditions) of
any character which, either individually or cumulatively, has had a Material
Adverse Effect.

                    3.2.9     SUBSIDIARIES.  Other than EDI Services Inc.,
ActaMed has no Subsidiaries.  Except as set forth in this Assets Purchase
Agreement, ActaMed does not own, or have the right to acquire, any securities or
other equity or ownership interest in any corporation, association or other
business entity or Person.

                    3.2.10    PENDING LITIGATION, ETC.  There are no actions at
law, suits in equity or other proceedings or, to the knowledge of ActaMed,
investigations in any court, tribunal or by or before any other governmental or
public authority or agency or any arbitrator or arbitration panel or any
governmental or private third-party insurance agency, pending or, to the
knowledge of ActaMed, threatened against or affecting ActaMed that either
individually or in the aggregate, would have a Material Adverse Effect, or,
would question the validity or enforceability of this Assets Purchase Agreement,
the ActaMed Documents, or any of the transactions contemplated hereby and
thereby.  ActaMed is not in default with respect to any Court Order.

                    3.2.11    TITLE TO PROPERTIES.  ActaMed has good and
marketable title to its properties and assets and has good title to all its
respective leasehold interests, in each case subject to no Lien, other than as
set forth on DISCLOSURE SCHEDULE 3.2.11 hereto.  DISCLOSURE SCHEDULE 3.2.11
accurately lists with respect to the personal property owned by ActaMed (i) each
financing statement, deed, agreement or other instrument which has been filed,
recorded or registered pursuant to any Regulation that names a business entity
as debtor or lessee or as the grantor or the transferor of the interest created
thereby, and (ii) as to each such financing statement, deed, agreement or other
instrument, the names of the debtor, lessee, grantor or transferor and the
secured party, lessor, grantee or transferee and the name of the jurisdiction in
which such financing statement, deed, agreement or other instrument has been
filed, recorded or registered.

                    3.2.12    INTELLECTUAL PROPERTY, ETC.  ActaMed owns or
possesses the rights to use, free from burdensome restrictions or conflicts with
the rights of others, all Intellectual Property necessary for the conduct of the
ActaMed Business as now conducted and as proposed to be conducted.  All licenses
constituting ActaMed's Intellectual Property are in full force and effect and
constitute legal, valid and binding obligation of the respective parties
thereto, and


                                    -19-
<PAGE>

there have not been and are not any Defaults thereunder by any party.  There 
are no outstanding options, licenses, or material agreements of any kind 
relating to the foregoing, nor is ActaMed bound by or a party to any options, 
licenses or agreements of any kind with respect to such Intellectual 
Property.  ActaMed has not received any communications alleging that it has 
violated or, by conducting its business as proposed, would violate any of the 
Intellectual Property rights of any other Person.  To ActaMed's knowledge, 
none of its employees is obligated under any contract (including licenses, 
covenants or commitments of any nature) or other agreement, or subject to any 
judgment, decree or order of any court or administrative agency, that would 
interfere with the use of their best efforts to promote the interests of 
ActaMed or that would conflict with the ActaMed Business as proposed to be 
conducted.  Neither the execution nor delivery of this Assets Purchase 
Agreement, nor the carrying on of the ActaMed Business by the employees of 
ActaMed, nor the conduct of the ActaMed Business as proposed, will, to 
ActaMed's knowledge, conflict with or result in a breach of the terms, 
conditions or provisions of, or constitute a Default under, any Contract 
under which any of such employees is now obligated.  ActaMed does not believe 
it is or will be necessary to utilize any inventions of any of its employees 
(or people it currently intends to hire) made prior to their employment by 
ActaMed.

                    3.2.13    COMPLIANCE WITH OTHER INSTRUMENTS.  ActaMed is not
in violation of or in Default in any material respect under any term of its
organizational documents, any term or provision of any mortgage, indenture,
contract, agreement, instrument, judgment or decree, and is not in violation in
any material respect of any applicable Regulation, and to ActaMed's knowledge,
there is no state of facts which, with the passage of time or giving of notice
or both, would constitute any such violation or Default that would in the
aggregate have a Material Adverse Effect.  The execution, delivery and
performance of and compliance with the ActaMed Documents, the issuance of the
shares of Series D Preferred Stock (and the Conversion Shares) and the
consummation of any other transaction contemplated by the ActaMed Documents have
not resulted and will not result in any such violation, or be in conflict with,
or constitute a Default under any of the foregoing, or result in the creation of
any Lien upon any of the properties or assets of ActaMed.

                    3.2.14    COMPLIANCE WITH LAW.  ActaMed is in compliance
with all Regulations to which it is subject, the violation of which, either
individually or in the aggregate, would have a Material Adverse Effect.  The
execution, delivery or performance of this Assets Purchase Agreement or any of
the other ActaMed Documents, and the consummation of the transactions
contemplated by the ActaMed Documents, will not cause ActaMed to be in violation
of any Regulation.

                    3.2.15    EMPLOYEES.  To the knowledge of ActaMed, no
employee of ActaMed is in violation of any term of any employment contract,
patent disclosure agreement or any other Contract relating to the Intellectual
Property of ActaMed or the relationship of any such employee with such entity or
any other party. 


                                    -20-


<PAGE>

                    3.2.16    EMPLOYEE BENEFIT PLANS.


                              (a)  DISCLOSURE SCHEDULE  3.2.16  contains a
current, correct and complete list of all the Employee Benefit Plans. 

                              (b)  All Employee Benefit Plans conform (and at
all times have conformed) in all material respects to, and are being
administered and operated (and have at all times been administered and operated)
in material compliance with, the requirements of ERISA, the Code and all other
applicable Regulations.  All returns, reports and disclosure statements required
to be made under ERISA and the Code with respect to all such Employee Benefit
Plans have been timely filed or delivered.  There have not been any "prohibited
transactions," as such term is defined in Section 4975 of the Code or Section
406 of ERISA, involving any of the Employee Benefit Plans, that could subject
ActaMed to any material penalty or tax imposed under the Code or ERISA.

                              (c)  Any Employee Benefit Plan intended to be
qualified under Section 401(a) of the Code and exempt from tax under Section
501(a) of the Code has been determined by the Internal Revenue Service to be so
qualified or an application for such determination is pending.  Any such
determination that has been obtained remains in effect and has not been revoked,
and with respect to any application that is pending, ActaMed has no reason to
suspect that such application for determination will be denied.  Nothing has
occurred since the date of any such determination that is reasonably likely to
affect adversely such qualification or exemption, or result in the imposition of
excise taxes or income taxes or unrelated business income under the Code or
ERISA with respect to any such Employee Benefit Plan.

                              (d)  ActaMed and the ERISA Affiliates do not
sponsor or contribute to, and have not in the past sponsored or contributed to,
and have no Liability with respect to, any defined benefit plan subject to Title
IV of ERISA or any multi-employer plan (as defined in Section 3(37) of ERISA). 
Neither ActaMed nor any ERISA Affiliate has any current or contingent obligation
to any multi-employer plan (as defined in Section 3(37) of ERISA). ActaMed does
not have any Liability with respect to any employee benefit plan or arrangement
other than with respect to the Employee Benefit Plans listed in DISCLOSURE
SCHEDULE 3.2.16.

                              (e)  There are no pending or, to the knowledge of
ActaMed, threatened claims by or on behalf of any such Employee Benefit Plans,
or by or on behalf of any individual participants or beneficiaries of any such
Employee Benefit Plans, alleging any violation of ERISA or any other Applicable
Regulations, or claiming benefit payments (other than those made in the ordinary
operation of such plans), nor is there, to the knowledge of ActaMed, any basis
for such claim.  Such Employee Benefit Plans are not the subject of any pending
(or to the knowledge of ActaMed, any threatened) investigation or audit by the
Internal Revenue Service, the U.S. Department of Labor or the Pension Benefit
Guaranty Corporation or any similar regulatory agency, foreign or domestic.


                                    -21-
<PAGE>

                              (f)  ActaMed has timely made all required payments
and contributions under the Employee Benefit Plans including the payment of all
insurance premiums.  All such payments and contributions have been deducted
fully by ActaMed for federal income tax purposes.  Such deductions have not been
challenged or disallowed by any governmental entity and ActaMed has no reason to
believe that such deductions are not properly allowable.  ActaMed has not
incurred any Liability for any tax, excise tax, penalty or fee with respect to
any Employee Benefit Plan, and, to the best of ActaMed's knowledge, no event has
occurred and no circumstance exists or has existed that could give rise to any
such Liability.  

                              (g)  The execution of and performance of the
transactions contemplated by this Assets Purchase Agreement will not (either
alone or upon the occurrence of any additional or subsequent events) result in
any payment, acceleration, vesting or increase in benefits with respect to any
employee or former employee of ActaMed, including one that would be an "excess
parachute payment" under Section 280G of the Code.

                              (h)  ActaMed does not maintain any plan or
arrangement that provides post retirement medical benefits, post retirement
death benefits or other post retirement welfare benefits, other than to the
extent required by Part 6 of Title I of ERISA.  

                              (i)  ActaMed does not maintain or contribute to,
nor has it in the past maintained or contributed to, any "welfare benefit fund"
(within the meaning of Section 419 of the Code).

                              (j)  Any Employee Benefit Plan that is a group
health plan (within the meaning of Section 4980B(g)(2) of the Code) complies and
has been administered in material respects in accordance with all of the
applicable requirements of Section 4980B of the Code, Part 6 of Title I of
ERISA, Title XXII of the Public Health Service Act, the Social Security Act and
all other applicable Regulations.

                              (k)  Any Employee Benefit Plan that is a group
health plan (within the meaning of Section 4980D(f)(1) of the Code) complies and
has been administered in material respects in accordance with all of the
applicable requirements of Subtitle K of the Code, Part 7 of Title I of ERISA, 
the Public Health Service Act and all other applicable Regulations, and

                              (l)  Neither ActaMed nor any ERISA Affiliate has
contributed to a non-conforming group health plan (as that term is defined in
Code section 5000(c)) or incurred any tax liability under Code section 5000(a).

                    3.2.17    COMPLIANCE WITH ENVIRONMENTAL LAWS.

                              (a)  ActaMed is in compliance with all applicable
environmental Regulations applicable to the ActaMed Business with respect to all
discharges into the ground and surface water, emissions into the ambient air and
generation, accumulation,


                                    -22-

<PAGE>

storage, treatment, recycling, transportation, labeling or disposal of waste 
materials or process by-products, except violations which, either 
individually or in the aggregate, would not have a Material Adverse Effect.  
ActaMed is not liable for any material penalties, fines or forfeitures for 
failure to comply with any of the foregoing.  All licenses, permits or 
registrations required for the ActaMed Business as presently conducted and 
proposed to be conducted, under any environmental Regulations have been or 
will, in a timely manner, be obtained or made, other than such licenses, 
permits or registrations as to which the failure to obtain or make, either 
individually or in the aggregate, will not have a Material Adverse Effect, 
and ActaMed is in compliance therewith in all material respects.

                              (b)  No release, emission or discharge into the
environment of hazardous substances, as defined under the Comprehensive
Environmental Response, Compensation, and Liability Act, as amended, or
hazardous waste, as defined under the Resource Conservation and Recovery Act, or
air pollutants as defined under the Clean Air Act, or pollutants, as defined
under the Clean Water Act, by ActaMed has occurred or is presently occurring on
or from any property owned or leased by ActaMed in excess of federal, state or
local permitted releases or reportable quantities, or other concentrations,
standards or limitations under the foregoing Regulations governing the
protection of health and the environment or under any other Regulations (then or
now applicable, as the case may be) other than such releases, emissions or
discharges, either individually or in the aggregate, would not have a Material
Adverse Effect.

                              (c)  To its knowledge, ActaMed has never (1)
owned, occupied or operated a site or structure on or in which any hazardous
substance was or is stored, transported or disposed of in violation of any
environmental Regulations at such time as such site or structure was owned,
occupied or operated by ActaMed or at any other time, or (2) transported or
arranged for the transportation of any hazardous substance other than in full
compliance with all applicable environmental Regulations governing the ActaMed
Business or the storage, transportation or disposal of hazardous substances
except for such violations as, either individually or in the aggregate, would
not have a Material Adverse Effect.  ActaMed has never caused or been held
legally responsible for any release or threatened release of any hazardous
substance, or received notification from any federal, state or other
governmental authority of any such release or threatened release, or that
ActaMed may be required to pay any costs or expenses incurred or to be incurred
in connection with any efforts to mitigate the environmental impact of any
release or threatened release, of any hazardous substance from any site or
structure owned, occupied or operated by ActaMed, except such releases or
threatened releases as, either individually or in the aggregate, would not have
a Material Adverse Effect.

                    3.2.18    INSURANCE.  The ActaMed Business has fire,
casualty, liability, and business interruption insurance policies with
recognized insurers, in such amounts and with such coverage as set forth on
DISCLOSURE SCHEDULE 3.2.18. 


                                    -23-

<PAGE>

                    3.2.19    MATERIAL CONTRACTS AND AGREEMENTS.  DISCLOSURE
SCHEDULE 3.2.19 lists the parties to, and subject matter of, all material
Contracts of the ActaMed Business, including without limitation, all employment
or labor contracts, leases or compensation plans.  Except as set forth on such
Schedule, all Contracts set forth on such list are valid, binding, and in full
force and effect, without any breach by ActaMed or, to ActaMed's knowledge, any
other party thereto.

                    3.2.20    TAXES.  All federal, state and other tax returns
of ActaMed required by law to be filed have been duly filed and all federal,
state and other Taxes, assessments, fees and other federal governmental charges
upon ActaMed or any of the properties, incomes or assets of ActaMed that are due
and payable have been paid.  No extensions of the time for the assessment of
deficiencies have been granted to ActaMed in connection with any federal tax,
assessment, fee or other federal governmental charge.  There are no Liens, on
any properties or assets of the ActaMed Business imposed or arising as a result
of the delinquent payment or the non-payment of any tax, assessment, fee or
other governmental charge that, either individually or in the aggregate, would
have a Material Adverse Effect.

                              (a)  ActaMed has not assumed and is not liable for
any Tax liability of any other Person, including any predecessor corporation, as
a result of any purchase of assets or other business acquisition transaction; 

                              (b)  ActaMed has not indemnified or agreed to
indemnify any other Person or otherwise agreed to pay on behalf of any other
Person tax liability growing out of or which may be asserted on the basis of any
tax treatment adopted with respect to all or any aspect of such a business
acquisition transaction;

                              (c)  The charges, accruals and reserves, if any,
on the books of ActaMed in respect of all Taxes for all fiscal periods to date
are adequate in accordance with GAAP, and ActaMed knows of no additional unpaid
assessments for such periods or other governmental charges payable by ActaMed in
connection with the execution and delivery of this Assets Purchase Agreement,
the ActaMed Documents or the issuance of the Shares of Series D Preferred Stock
by ActaMed, other than stock transfer taxes, recording fees and filing fees in
connection with state securities or "blue sky" filings.

                    3.2.21    INVESTMENT COMPANY.  ActaMed is not an "investment
company", or an "affiliated person" of an "investment company", or a company
"controlled" by an "investment company" as such terms are defined in the
Investment Company Act of 1940, as amended, and ActaMed is not an "investment
adviser" or an "affiliated person" of an "investment adviser" as such terms are
defined in the Investment Advisers Act of 1940, as amended.


                                    -24-

<PAGE>

                    3.2.22    LABOR RELATIONS.  ActaMed is not engaged in any
unfair labor practices.  There is:

                              (a)  no unfair labor practice complaint pending
or, to the best of ActaMed's knowledge, threatened against ActaMed before the
National Labor Relations Board or any court or labor board, and no grievance or
arbitration proceedings arising out of or under collective bargaining agreements
is so pending or, to the best of ActaMed's knowledge, threatened,

                              (b)  no strike, lock-out, labor dispute, slowdown
or work stoppage pending or, to the best of ActaMed's knowledge, threatened
against ActaMed, and

                              (c)  no union representation or certification
question existing or pending with respect to the employees of ActaMed, and, to
the best knowledge of ActaMed, no union organization activity taking place,
other than such actions or proceedings as, either individually or in the
aggregate, would not have a Material Adverse Effect.

                    3.2.23    NO CONFLICT OF INTEREST.  ActaMed is not indebted,
directly or indirectly, to any Substantial Holder, or, to ActaMed's knowledge,
to any Affiliate of a Substantial Holder, in any amount whatsoever.  To the best
knowledge of ActaMed, no Substantial Holders, or any of their Affiliates, are
indebted to any firm or corporation with which ActaMed is affiliated or with
which ActaMed has a business relationship, or any firm or corporation which
competes with ActaMed.  Except as contemplated by the ActaMed Documents, no
Substantial Holder, or, to ActaMed's knowledge, any Affiliate of a Substantial
Holder, is directly or indirectly interested in any contract with ActaMed or any
of its Subsidiaries.

                    3.2.24    BROKERS OR FINDERS.  No broker, agent, finder or
consultant or other Person has been retained by or on behalf of ActaMed (other
than legal or accounting advisors), or is or may be entitled to be paid based
upon any agreements or understandings made by ActaMed in connection with the
transactions contemplated hereby.

                    3.2.25    FULL DISCLOSURE.  This Assets Purchase Agreement,
the other ActaMed Documents, and any report or financial statement referred to
in this Section 3.2 hereof and any certificate, report, statement or other
writing furnished to  SBCL by or on behalf of ActaMed in connection with the
negotiation of this Assets Purchase Agreement and the other ActaMed Documents
and the sale of the shares of Series D Preferred Stock, taken as a whole, do not
contain any untrue statement of a material fact or omit to state a material fact
with respect to which disclosure has been requested and which is necessary to
make the statements contained herein or therein not misleading.


                                    -25-
<PAGE>



                                      ARTICLE 4   

                                  TRANSITION MATTERS


     SECTION 4.1    PRIOR TO REGION TRANSFER.

                    4.1.1     SBCL CONTINUED OPERATION.  Except (i) as 
contemplated by the Implementation Plan, (ii) with the prior written consent 
of ActaMed, or (iii) as necessary to effect the transactions contemplated by 
this Assets Purchase Agreement, SBCL shall, with respect to all SBCL Sites in 
each Region which has not been transferred, until the Applicable Transfer 
Date for the Region:

                              (a)  provide Lab EDI Services using the SCAN
Network in substantially the same manner as presently being conducted;

                              (b)  use its best efforts to preserve its present
relationships with Automated Providers and vendors; and

                              (c)  notify ActaMed of any development materially
and adversely affecting its ability to provide Lab EDI Services, and of any
governmental complaints, investigations or hearings (or written communications
indicating that the same is contemplated) or administrative proceedings,
involving its ability to provide Lab EDI Services, and permit its
representatives prompt access to all materials prepared in connection therewith.

                    4.1.2     SCAN EXPENSE STATEMENTS.  SBCL will cooperate with
ActaMed and Ernst & Young, or another of the "Big 6" national accounting firms
chosen by ActaMed and approved by SBCL ("CPA"), and provide CPA access to SBCL's
business and accounting records relating to SBCL's provision of Lab EDI Services
so that CPA may prepare audited financial statements, as of December 31, 1995,
December 31, 1996, and December 31, 1997, with respect to SBCL's provision of
such services, to the extent required for ActaMed to complete a registration of
the ActaMed Common Stock with the Securities Exchange Commission.  ActaMed will
be responsible for, and pay, the expense of said audit, and ActaMed and SBCL
shall use their collective best efforts to cause said audit to be completed on
or prior to April 30, 1998.

     SECTION 4.2    REGION TRANSITION MATTERS.

                    4.2.1     IMPLEMENTATION PLAN.  (a) As a further condition
precedent to the occurrence of the Region One Transfer Date, the parties have
prepared a detailed plan regarding the transition of SBCL Sites into ActaMed
Sites (the "IMPLEMENTATION PLAN"), a copy of which is attached hereto as
SCHEDULE 4.2.1.  SBCL's nominees to the Implementation Committee shall review
the Implementation Plan and shall notify ActaMed as to any proposed changes to
the Implementation Plan on or prior to January 15, 1998.  ActaMed shall
implement all such


                                    -26-
<PAGE>

changes, except to the extent its designees to the Implementation Committee 
reasonably believe that any such change would materially impact ActaMed's 
ability to meet the Transfer Benchmarks or the Performance Standards (as 
defined in the Services Agreement), or would have a Material Adverse Effect 
on ActaMed.  If SBCL's designees to the Implementation Committee disagree 
with ActaMed's assessment of a proposed change, the dispute shall be resolved 
in accordance with the provisions of Article IX hereof.  The Implementation 
Plan shall continue in force, without any modification in respect of the 
disputed change, until resolution of the matter.

                              (b)  In the event of any conflict between the
terms of the Implementation Plan, on the one hand, and this Assets Purchase
Agreement, the Services Agreement, the License or the Development Agreement, on
the other, the terms of the relevant Transaction Document shall govern and
control over those of the Implementation Plan.  

                    4.2.2     IMPLEMENTATION COMMITTEE.  ActaMed and SBCL shall
form an implementation committee, consisting of an equal number of
representatives of ActaMed and SBCL (the "IMPLEMENTATION COMMITTEE"), authorized
and directed to (i) apply the Implementation Plan to each Region prior to it
being transferred to ActaMed, (ii) oversee, manage and implement the transition
of SBCL Sites into ActaMed Sites in accordance with the Implementation Plan;
(iii) revise and adapt the Implementation Plan to changing circumstances; and 
(iv) determine the steps to be taken by the parties in those instances where the
Implementation Plan does not address an issue or problem presented.  The
Implementation Committee shall initially be comprised of the people named on
SCHEDULE 4.2.2 hereto.  From such list, ActaMed and SBCL shall each designate
one person (each an "RELATIONSHIP MANAGER") who together will manage the
Implementation Committee. 

                    4.2.3     ASSISTANCE FROM SBCL.  SBCL will provide resources
to assist ActaMed in the transition of SBCL Sites to ActaMed Sites as more fully
provided in the Services Agreement.

     SECTION 4.3    GENERAL COVENANTS.

                    4.3.1     ACCESS TO PROPERTIES.  At all times prior to the
last Transfer Date, the Transferred Employees, attorneys, accountants, agents
and other authorized and designated representatives of ActaMed  will be allowed
upon reasonable advance notice and with minimal disruption to SBCL's business
operations, reasonable access to the properties, books and records of SBCL
relating to the SCAN Assets located at SBCL Sites, including without limitation,
title documents, leases, customer lists, and other data that, in the reasonable
opinion of both ActaMed and SBCL, are required for ActaMed to obtain such
information as it may reasonably request about the Transferred Employees or such
SCAN Assets.  ActaMed shall also be allowed reasonable opportunity to consult
with the officers, employees, accountants, counsel and agents of SBCL in
connection with such investigation. 


                                    -27-
<PAGE>

                    4.3.2     OTHER OFFERS AND EXCLUSIVE DEALING.  Unless and
until notice of termination of this Assets Purchase Agreement prior to the last
Transfer Date pursuant to Article X hereof, SBCL shall not, acting in any
capacity, directly or indirectly, through any officer, director, employee,
agent, affiliate or otherwise of SBCL, (a) solicit, initiate or encourage
submission of proposals or offers from any Person, corporation or other entity
for the primary or specific purpose of selling the SCAN Assets located at SBCL
Sites, or relating to the provision of Lab EDI Services to Automated Providers,
(b) participate in any discussions or negotiations regarding, or, except as
required by a legal or judicial process, furnish to any other Person,
corporation or other entity any information with respect to, or otherwise
cooperate in any way with, or assist or participate in, facilitate or encourage,
any effort or attempt by any other Person to purchase the SCAN Assets located at
SBCL Sites or to obtain the right to provide Lab EDI Services to Automated
Providers, or (c) approve or undertake any such transaction.  Nothing in this
Section 4.3.2 shall restrict what SBCL may otherwise do under the Services
Agreement.

                    4.3.3     CONSENTS AND APPROVALS.  SBCL will use its best 
efforts to obtain the waiver, consent and approval of all Persons whose 
waiver, consent or approval (a) is required in order to consummate the 
transactions contemplated by this Assets Purchase Agreement, or (b) is 
required by any Contract to be assumed by ActaMed, or by any Court Order or 
License to which SBCL is a party or subject on any Transfer Date in 
connection with the provision of Lab EDI Services, and which would prohibit, 
or require the waiver, consent or approval of such transactions, or under 
which such transactions would, without such waiver, consent or approval, 
constitute a Default under the provisions thereof, result in the acceleration 
of any obligation thereunder, or give rise to a right of any party thereto to 
terminate its obligations thereunder.  All written waivers, consents and 
approvals obtained by SBCL relating to a Region shall be provided to ActaMed 
on the Transfer Date relating to such Region in form and content reasonably 
satisfactory to ActaMed.  Without limiting the generality of the foregoing, 
SBCL shall cause the [*] to sell to ActaMed in accordance with the terms and 
conditions of this Agreement the SCAN Assets located in Region Two on or 
prior to December 31, 1998.

               To the extent that SBCL's rights under any Contract or other SCAN
Asset to be assigned to ActaMed hereunder may not be assigned without the
consent of another Person which has not been obtained, this Assets Purchase
Agreement shall not constitute an agreement to assign the same if an attempted
assignment would constitute a breach thereof or be unlawful.  If notwithstanding
the best efforts of SBCL described above any such consent shall not be obtained,
or if any attempted assignment would be ineffective or would impair ActaMed's
rights under the SCAN Asset in question so that ActaMed would not in effect
acquire the benefit of all such rights, ActaMed to the maximum extent permitted
by law, shall act after the Applicable Transfer Date as SBCL's agent in order to
obtain for it the benefits thereunder and shall cooperate, to the maximum extent
permitted by law, with SBCL in any other reasonable arrangement designed to
provide such benefits to ActaMed.

                    4.3.4     PUBLIC ANNOUNCEMENTS.  The parties hereto are in
the process of  jointly developing a plan (the "COMMUNICATION PLAN") for
communicating the transactions

[*] CONFIDENTIAL TREATMENT REQUESTED

                                    -28-
<PAGE>

contemplated by this Assets Purchase Agreement and the Services Agreement to 
Automated Providers, Transferred Employees and the public, a draft of which 
attached as SCHEDULE 4.3.4 hereto.  The parties agree to use their collective 
best efforts to complete the Communication Plan by January 6, 1998, and each 
party agrees to abide by such Communication Plan. Without limiting the 
foregoing, neither party shall send any communication to any Automated 
Providers or Transferred Employee describing, or otherwise in connection 
with, the transactions and relationships contemplated by this Agreement (and 
such other agreements) unless the form and content of such communication 
shall have been approved in advance by the other unless required by law or 
judicial process, in which case notification shall be given to the other 
party hereto prior to such disclosure.

                    4.3.5     STANDSTILL.  At all times prior to the last
Transfer Date, ActaMed shall not consummate, or enter into any agreement with
respect to a Sale of Assets (as that term is defined in the Articles), without
the prior written consent of SBCL.

                              If, at any time prior to the last Transfer 
Date, (i) ActaMed consummates any Merger, Share Exchange or Consolidation (as 
such terms are defined in the Articles) (a "Combination"); (ii) the holders 
of ActaMed stock immediately prior to the Combination are not the holders of 
a majority of the voting stock of the surviving company of the Combination, 
(iii) Michael K. Hoover no longer has (or has diminished) responsibility for 
overseeing and, directly or indirectly, managing the transfer of the Regions 
under Section 2.3, and (iv) the Transfer Date of any remaining Region does 
not occur as scheduled under Section 2.3, then SBCL may withhold [*] of the 
Fixed Fee (as defined in the Services Agreement) due on or after such 
scheduled date or dates until such time as all Regions have been transferred.

     SECTION 4.4    CONFIDENTIALITY OF TRADE SECRETS.  Each party hereto agrees
not to use, copy or disclose the Trade Secrets of the other party, except as
permitted by this Assets Purchase Agreement and the other Transaction Documents.
Each party shall treat the other's Trade Secrets with at least that degree of
care it uses with respect to its own such Trade Secrets.  SBCL will give access
to its Trade Secrets relating to its provision of Lab EDI Services to those
ActaMed personnel who have a need for such access and to no other Person
whatsoever.  ActaMed will give access to its Trade Secrets relating to the
provision of Lab EDI Services to those SBCL personnel who have a need for such
access and to no other Person whatsoever.  The requirements herein contained
with respect to non-disclosure and non-use and protection of each party's Trade
Secrets shall permanently survive termination of any other provisions of this
Assets Purchase Agreement or the other Transaction Documents.  If any party is
ordered by a court, administrative agency, or other governmental body of
competent jurisdiction to disclose Trade Secrets, or if it is served with or
otherwise becomes aware of a motion or similar request that such an order be
issued, then such party will not be liable to the other party for disclosure of
Trade Secrets required by such order if the disclosing party complies with the
following requirements:  (1) if an already issued order calls for immediate
disclosure, then the disclosing party shall immediately move for or otherwise
request a stay of such order to permit the other

[*] CONFIDENTIAL TREATMENT REQUESTED

                                    -29-
<PAGE>

party to respond; (2) the disclosing party promptly notifies the other party 
of the motion or order; and (3) the disclosing party does not oppose a motion 
or similar request by the other party for an order protecting the Trade 
Secrets including joining or agreeing to (or non-opposition to) a motion for 
leave to intervene by such other party.  Notwithstanding anything to the 
contrary contained in this Assets Purchase Agreement, SBCL may disclose to 
the Office of Inspector General of the Department of Health and Human 
Services (the "OIG") as part of the disclosure SBCL makes under its Integrity 
Agreement the fact that SBCL and ActaMed have entered into the transactions 
contemplated by the parties and any information relating to such transaction 
or this Assets Purchase Agreement which SBCL determines, in good faith upon 
advice of counsel, is required or, in light of SBCL's obligations under the 
Integrity Agreement, appropriate for SBCL to make, or SBCL proposes to make 
in response to a request for such information from the OIG, provided that 
ActaMed shall be given opportunity (which shall be reasonable in light of all 
facts and circumstances) to review and comment upon the information SBCL 
intends to include in any such submission.  In the event that any such 
disclosure that SBCL intends to make includes any information that 
constitutes Trade Secrets of ActaMed, SBCL will provide reasonable (in light 
of all facts and circumstances, including the time frame in which such 
disclosure is required to be made) assistance to ActaMed to take reasonable 
steps to assure that such Trade Secrets of ActaMed are maintained in 
confidence, including, but not limited to, (i) requesting that the OIG treat 
such information as trade secrets within the meaning of the Freedom of 
Information Act, 5 U.S.C. Section 552(b)(4), (ii) requesting of the OIG that 
SBCL and ActaMed be given prior notice of an proposed release of such 
information to Persons or entities outside of the OIG; (iii) requesting that 
the OIG otherwise assure the confidentiality of the information provided by 
ActaMed as if such information was a Trade Secret of SBCL [*] and taking 
other reasonable steps that may be requested by ActaMed and to which SBCL 
may, in its sole discretion, agree to assure that the OIG honors its 
confidentiality obligations in that section; (iv) where such information is 
to be provided in response to a request by the OIG, take reasonable steps to 
narrow the request from the OIG in an appropriate manner in order to limit 
the amount of information, if any, that constitutes Trade Secrets of ActaMed 
covered by such request; and (v) make reasonable efforts to permit ActaMed, 
with the concurrence of the OIG, to disclose such information directly to the 
OIG, provided that in any such case, ActaMed shall give SBCL a timely 
opportunity to review, comment upon and approv the information ActaMed 
intends to include in such submission. The additional safeguards described in 
subsections (i) through (v) above are designed to help assure the 
confidentiality of the Trade Secrets, the disclosure of which would have a 
material adverse impact on ActaMed.  These additional provisions are not 
intended to interfere with SBCL's ability to meet its disclosure obligations 
under the Integrity Agreement.  Each party shall promptly notify the other in 
the event it receives an inquiry, investigation or request for information 
from the OIG or other governmental agency into the matters relating to the 
proposed transactions.  The provisions of this Section 4.4 shall apply in 
addition to similar provisions in the Services Agreement.

     SECTION 4.5    EFFORTS TO SATISFY CONDITIONS.  SBCL and ActaMed each agree
to use their respective best efforts to cause the Transfer Dates to occur as
currently scheduled.  In 

[*] CONFIDENTIAL TREATMENT REQUESTED

                                    -30-

<PAGE>

addition, SBCL agrees to use its best efforts to satisfy the conditions set 
forth in Section 7.1 hereof, and ActaMed agrees to use its best efforts to 
satisfy the conditions set forth in Section 7.2 hereof. In furtherance of the 
foregoing, each party will use its best efforts to take all commercially 
reasonable steps necessary or desirable and proceed diligently and in good 
faith to satisfy each condition to the obligations of the other party 
contained in this Assets Purchase Agreement and will not take or fail to take 
any commercially reasonable action that could reasonably be expected to 
result in the nonfulfillment of any such condition.  Each of ActaMed and SBCL 
further agrees to use its best efforts to (i) satisfy any conditions to the 
transfer of a Region set forth in Section 2.3, and (ii) deliver any and all 
documents to be delivered upon the transfer of a Region, as set forth in 
Sections 2.5 and 2.6.

     SECTION 4.6    EXPENSES.  Except as otherwise provided herein, each of 
the parties to this Assets Purchase Agreement shall bear its respective 
expenses incurred in connection with the preparation, execution and 
performance of this Assets Purchase Agreement and the transactions 
contemplated hereby, including, without limitation, all fees and expenses of 
agents, representatives, counsel and accountants.

     SECTION 4.7    ANTITRUST NOTIFICATION.  The parties have filed with the 
United States Federal Trade Commission and the United States Department of 
Justice the notification and report form required for the transactions 
contemplated hereby and any supplemental or additional information which was 
requested in connection therewith pursuant to the HSR Act.  The filing fee 
relating to such notification and report form will be borne equally.


                                      ARTICLE 5   

                              ACTAMED COVENANTS TO SBCL

     SECTION 5.1    ADDITIONAL COVENANTS OF ACTAMED.  ActaMed covenants and 
agrees that:

                    5.1.1     SECURITIES LAW FILINGS.  From and after 
consummation of a Public Offering and for so long as a Permitted Owner holds 
any Conversion Shares, ActaMed will timely file the reports required to be 
filed by it under the Securities Act and the Exchange Act and the Regulations 
adopted by the SEC thereunder, to the extent required from time to time to 
enable the Permitted Owner to sell Conversion Shares without registration 
under the Securities Act within the limitation of the exemptions provided by 
(a) Rule 144 under the Securities Act, as such rule may be amended from time 
to time, or (b) any similar Regulation hereafter adopted by the SEC.  Upon 
the request of the Permitted Owner, ActaMed will deliver to the Permitted 
Owner a written statement as to whether it has complied with such 
requirements.

                    5.1.2     TRANSACTIONS WITH SUBSTANTIAL HOLDERS.  ActaMed 
shall not, directly or indirectly, knowingly enter into any material 
transaction or agreement with any of its Substantial Holders or any Affiliate 
or officer of ActaMed or a Substantial Holder, or a material 


                                     -31-
<PAGE>

transaction or agreement in which a Substantial Holder or Affiliate or 
officer of ActaMed or a Substantial Holder has a direct or indirect interest, 
unless such transaction or agreement is on terms and conditions no less 
favorable to ActaMed or any of its Subsidiaries than could be obtained at the 
time in an arm's length transaction with a third Person that is not such a 
Substantial Holder or Affiliate or officer of ActaMed or a Substantial 
Holder, and such transaction or agreement has been reviewed and approved by a 
majority of those members of ActaMed's Board of Directors who have no such 
interest in the transaction.  Except as provided in Section 11.1.4, this 
Section shall not be enforceable against ActaMed by (i) any Person other than 
a Permitted Owner or (ii) any Person not a party to this Assets Purchase 
Agreement.

                    5.1.3     BUSINESS AND FINANCIAL COVENANTS.  ActaMed 
covenants that:

                              (a)  Except for shares issued (i) upon exercise 
of options granted in accordance with the Stock Option Plans, the Articles 
and the Stockholders Agreement, (ii) upon conversion of shares of Preferred 
Stock, (iii) in connection with a Public Offering,  (iv) upon exercise of the 
Warrant, or (v) as permitted under the Articles and the Stockholders 
Agreement, ActaMed will not, and will not permit any of its Subsidiaries, to 
hereafter issue or sell any shares or any securities convertible into, or any 
warrants, rights, or options to purchase shares of, the capital stock of 
ActaMed or such Subsidiary to any Person other than ActaMed, and ActaMed will 
not pledge any of the capital stock of any Subsidiary to any Person.  ActaMed 
will not, in any event, issue or sell any shares of Series D Preferred Stock 
to any Person other than SBCL or its Affiliates.

                              (b)  Except as expressly permitted by the 
Articles or the Stockholders Agreement, ActaMed shall not (except for the 
advancement of money for expenses in the ordinary course of business) make, 
or permit any of its Subsidiaries to make, any loans or advances to any 
Person or have outstanding any investment in any Person, whether by way of 
loan or advance to, or by the acquisition of the capital stock, assets or 
obligations of,  or any other interest in, any Person.

                              (c)  Except as expressly permitted herein or by 
the Articles or the Stockholders Agreement, neither ActaMed nor any of its 
Subsidiaries shall declare or make (i) any payment or the incurrence of any 
Liability to make any payment in cash, property or other assets as a dividend 
or other distribution in respect of any shares of capital stock of ActaMed or 
any Subsidiary, excluding, however, any dividends payable to ActaMed by a 
Subsidiary or dividends which may be payable solely in ActaMed Common Stock 
or the common stock of  any Subsidiary and (ii) except as otherwise permitted 
by the Transaction Documents or a stock option agreement under the Stock 
Option Plans, any payment or the incurrence of any Liability to make any 
payment in cash, property or other assets for the purposes of purchasing, 
retiring or redeeming any shares of any class of capital stock of ActaMed or 
any Subsidiary or any warrants, options or other rights to purchase any such 
shares. 

                              (d)  Neither ActaMed nor any of its 
Subsidiaries will amend or change its articles of incorporation or bylaws, or 
violate or breach any of the provisions thereof.


                                     -32-
<PAGE>

                              (e)  Without the consent of a majority of the 
Board of Directors:

                                    (i)      Other than debt in an amount no 
greater than $2,000,000 incurred to fund the cash portion of the Purchase 
Price, ActaMed shall not create, incur or suffer to exist, or permit any 
Subsidiary to create, incur or suffer to exist, any debt other than: (a) debt 
existing on the date hereof and included in the ActaMed Financial Statements 
or incurred in the ordinary course of business between the date of the 
ActaMed Financial Statements and the date hereof, and any renewals or 
replacements of such debt not exceeding the principal amount of the debt 
being replaced or renewed; and (b) debt not in excess of $1,000,000 in the 
aggregate in any one calendar year.

                                    (ii)     ActaMed shall not create or 
suffer to exist, or permit any Subsidiary to create or suffer to exist, any 
obligations for the payment of rent for any property under leases or 
agreements to lease, other than obligations for (a) the payment of rent 
which, in the aggregate, do not exceed $1,000,000 annually and (b) payments 
under leases set forth on DISCLOSURE SCHEDULE 3.2.19.

                                    (iii)    ActaMed shall not acquire, or 
permit any Subsidiary to acquire, directly or indirectly, the assets of or 
equity interests in any other business or entity, whether by purchase, merger 
consolidation or otherwise in excess of $1,000,000.

                                    (iv)     ActaMed shall not effect an 
initial Public Offering of any equity securities, other than equity 
securities issued in a merger, totaling less than $15,000,000 (before 
discounts and commissions) in gross proceeds to ActaMed, and at a per share 
price of less than 2.5 times the then existing conversion price of the Series 
A Preferred Stock.

                    5.1.4     CORPORATE EXISTENCE, BUSINESS, MAINTENANCE, 
INSURANCE.

                              (a)  ActaMed will at all times preserve and 
keep in full force and effect its corporate existence and rights and 
franchises deemed material to its business and those of its Subsidiaries, 
except any Subsidiary of ActaMed may be merged into ActaMed or another 
Subsidiary.

                              (b)  ActaMed shall engage solely in the 
business of developing healthcare information networks (with a principle 
focus on the provision of lab order entry and results reporting services) and 
businesses closely related thereto.  ActaMed (and any Subsidiary) will not 
purchase or acquire any property other than property useful in and related to 
such business.

                              (c)  ActaMed will maintain or cause to be 
maintained in good repair, working order and condition all properties used or 
useful in the business of ActaMed and any Subsidiary and from time to time 
will make or cause to be made all appropriate repairs, 


                                     -33-
<PAGE>

renewals and replacements thereof.  ActaMed and any Subsidiary will at all 
times comply in all material respects with the provisions of all material 
leases to which it is a party or under which it occupies property so as to 
prevent any loss or forfeiture thereof or thereunder.

                              (d)  ActaMed will maintain or cause to be 
maintained, with financially sound and reputable insurers, appropriate 
insurance with respect to its properties and business and the properties and 
business of any Subsidiary against loss or damage.

                    5.1.5     REPURCHASE OF SHARES OF PREFERRED STOCK.  
Except as provided in Article Three, Section 5.1 of the Fourth Amended 
Articles, ActaMed shall not, and shall not permit any of its Subsidiaries or 
any Affiliate of ActaMed to, directly or indirectly, redeem or repurchase or 
make any offer to redeem or repurchase any shares of (i) Preferred Stock 
other than Series D Preferred Stock, unless ActaMed, such Subsidiary or such 
Affiliate has offered to repurchase shares of Preferred Stock PRO RATA, from 
all holders of outstanding shares of Preferred Stock, including without 
limitation the Series D Preferred Stock, upon the same terms, or (ii) Series 
D Preferred Stock unless ActaMed, such Subsidiary or such Affiliate has 
offered to repurchase shares of Series D Preferred Stock PRO RATA, from all 
holders of outstanding shares of Series D Preferred Stock upon the same terms.

                    5.1.6     COMPENSATION.  All awards of compensation, 
including, but not limited to, salary, bonus and awards of stock options made 
to executive officers and/or directors of ActaMed shall be determined by 
ActaMed in accordance with the terms of the Stockholders' Agreement and the 
Articles.

                    5.1.7     SFA AMENDMENT.  ActaMed shall deliver to SBCL, 
within five (5) business days of the Region One Transfer Date, a duly 
executed and delivered Amendment to that certain Amended and Restated 
Development Agreement, dated the 21st day of November, 1996, but effective as 
of the 3rd day of December, 1993, by and between ActaMed and The SFA Limited 
Partnership, which Amendment shall provide, on terms satisfactory to SBCL and 
its counsel, that the SBCL Software, the ActaLab Software and any 
Intellectual Property developed under the Development Agreement shall not 
constitute "ActaMed Technology," as defined in such Amended and Restated 
Development Agreement with The SFA Limited Partnership.

                    5.1.8     NEW BUSINESS PLAN.  Within thirty days after 
the Region One Transfer Date, the Board of Directors of ActaMed will approve 
and adopt a new business plan (the "NEW BUSINESS PLAN") for ActaMed covering 
the years 1998 and 1999, which shall include projected financial data, 
including statements of operations, and operational data, including number of 
sites and transactions per site.  The new business plan shall provide monthly 
data for 1998 and quarterly data for 1999. By June 30, 1999, the Board of 
Directors of ActaMed will approve and adopt an addendum to the plan, covering 
the same items of financial and operational data, for the year 2000, 
presented on a monthly basis.  The nominal values set forth in the New 
Business Plan shall not deviate from analogous figures presented in ActaMed's 
existing business plan, a copy of which was forwarded to SBCL prior to 
December 1, 1997, by more than seven percent (7%).


                                     -34-
<PAGE>

     Section 5.2    INFORMATIONAL COVENANTS OF ACTAMED.  ActaMed covenants 
and agrees that it shall deliver the following information to any Permitted 
Owner for so long as (except as set forth in Section 5.2.6)  such Permitted 
Owner shall hold [*] of the aggregate outstanding shares of Preferred 
Stock or Conversion Shares (considered as a single class) or until such time 
as ActaMed shall have consummated a Public Offering:

                    5.2.1     AUDITED ANNUAL FINANCIAL STATEMENTS.  As soon 
as practicable and, in any case, within one hundred and twenty (120) days 
after the end of each fiscal year, financial statements of ActaMed, 
consisting of the balance sheet of ActaMed as of the end of such fiscal year 
and the statements of operations, statements of stockholders equity and 
statements of cash flows of ActaMed for such fiscal year, setting forth in 
each case, in comparative form, the figures for the preceding fiscal year, 
all in reasonable detail and fairly presented in accordance with GAAP applied 
on a consistent basis throughout the periods reflected therein, except as 
stated therein, and accompanied by an opinion thereon of Ernst & Young, or 
other independent certified public accountants selected by ActaMed of good 
and recognized national standing in the United States.

                    5.2.2     QUARTERLY UNAUDITED FINANCIAL STATEMENTS.  As 
soon as practicable and, in any case, within forty-five (45) days after the 
end of each of the first three fiscal quarters in each fiscal year, unaudited 
financial statements of ActaMed setting forth the balance sheet of ActaMed at 
the end of each such fiscal quarter and the statements of operations and 
statements of cash flows of ActaMed for each such fiscal quarter and for the 
year to date, and setting forth in comparative form figures as of the 
corresponding date and for the corresponding periods of the preceding fiscal 
year, all in reasonable detail and certified by an accounting officer of 
ActaMed as complete and correct, as having been prepared in accordance with 
GAAP consistently applied (except as otherwise disclosed therein) and as 
presenting fairly, in all material respects, the financial position of 
ActaMed and any of its Subsidiaries and results of operations and cash flows 
thereof subject, in each case, to customary exceptions for interim unaudited 
financial statements.

                    5.2.3     MONTHLY UNAUDITED FINANCIAL STATEMENTS.  As 
soon as available, but in any event within thirty (30) days after the end of 
each calendar month, copies of the unaudited balance sheet of ActaMed as at 
the end of such calendar month and the related unaudited statements of 
operations and cash flows for such calendar month and the portion of the 
calendar year through such calendar month, in each case setting forth in 
comparative form the figures for the corresponding periods of (a) the 
previous calendar year and (b) the budget for the current year, prepared in 
reasonable detail and in accordance with GAAP applied consistently throughout 
the periods reflected therein (except as otherwise disclosed therein) and 
certified by the chief financial officer of ActaMed as presenting fairly the 
financial condition and results of operations of ActaMed and any of its 
Subsidiaries (subject to customary exceptions for interim unaudited financial 
statements).

[*] CONFIDENTIAL TREATMENT REQUESTED

                                     -35-
<PAGE>

                    5.2.4     MANAGEMENT'S ANALYSIS.  All the financial 
statements delivered pursuant to Sections 5.2.2 and Section 5.2.3 shall be 
accompanied by an informal narrative description of material business and 
financial trends and developments and significant transactions that have 
occurred in the appropriate period or periods covered thereby.

                    5.2.5     BUDGETS.  As soon as practicable, but in any 
event within thirty (30) days prior to the commencement of a fiscal year, an 
annual operating budget for such fiscal year, approved by the Board of 
Directors, including monthly income and cash flow projections and projected 
balance sheets as of the end of each quarter within such fiscal year.  
Extensions of such due date shall not be unreasonably withheld.

                    5.2.6     INSPECTION.  Upon reasonable notice, ActaMed 
shall, and shall cause any of its Subsidiaries to, permit any Permitted Owner 
(so long as it owns [*] or more of the outstanding capital stock of ActaMed) 
by its representatives, agents or attorneys:

                              (a)  to examine all books of account, records, 
reports and other papers of ActaMed or such Subsidiary except to the extent 
that such action would, in the reasonable opinion of counsel, constitute a 
waiver of the attorney/client privilege,

                              (b)  to make copies and take extracts from any 
thereof, except for information which is confidential or proprietary,

                              (c)  to discuss the affairs, finances and 
accounts of ActaMed or such Subsidiary with ActaMed's or such Subsidiary's 
officers and independent certified public accountants (and by this provision 
ActaMed hereby authorizes said accountants to discuss with the Permitted 
Owner and its representatives, agents or attorneys the finances and accounts 
of ActaMed or such Subsidiary), and

                              (d)  to visit and inspect, at reasonable times 
and on reasonable notice during normal business hours, the properties of 
ActaMed and such Subsidiary. 

Notwithstanding any provision herein to the contrary, the provisions of this 
Section 5.2.6 are in addition to any rights of a Permitted Owner under the 
Georgia Business Corporation Code and shall in no way limit such rights.

               The expenses of the Permitted Owner in connection with any 
such inspection shall be for the account of the Permitted Owner.  
Notwithstanding the foregoing sentence, it is understood and agreed by 
ActaMed that all reasonable expenses incurred by ActaMed or such Subsidiary, 
any officers, employees or agents thereof or the independent certified public 
accountants therefor, shall be expenses payable by ActaMed and shall not be 
expenses of the Permitted Owner making the inspection.

               Notwithstanding anything to the contrary, SBCL shall be 
permitted access to any information of, or related to, any customer of 
ActaMed that is a competitor of SBCL only to the 

[*] CONFIDENTIAL TREATMENT REQUESTED

                                     -36-
<PAGE>

extent ActaMed is not subject to confidentiality undertakings with respect to 
such information; PROVIDED that such limitation shall not prevent SBCL or 
auditors retained by SBCL, or if ActaMed so requires for reasons of 
confidentiality only auditors retained by SBCL, from confirming the amount of 
royalties payable to it under the License Agreement or Services Agreement by 
reason of connectivity between Providers and commercial laboratories other 
than SBCL Labs.

                    5.2.7     OTHER INFORMATION.  ActaMed shall deliver the 
following provided that in the reasonable opinion of counsel to ActaMed such 
disclosure will not constitute a waiver of the attorney/client privilege, the 
breach of any secrecy covenant or the release of information regarding 
competitors of the Permitted Owner:

                              (a)  promptly after the submission thereof to 
ActaMed, copies of any detailed reports (including the auditors' comment 
letter to management, if any such letter is prepared) submitted to ActaMed by 
its independent auditors in connection with each annual or interim audit of 
the accounts of ActaMed made by such accountants;

                              (b)  promptly, and in any event within ten (10) 
days after obtaining knowledge thereof, notice of the institution of any 
suit, action or proceeding (other than a proceeding of general application 
which is not directly against ActaMed or one or more of the Subsidiaries), 
the happening of any event or, to the best knowledge of ActaMed, the 
assertion or threat of any claim against ActaMed or any of the Subsidiaries 
which, either individually or in the aggregate, would have a Material Adverse 
Effect;

                              (c)  promptly upon, and in any event within 
thirty (30) days after obtaining knowledge thereof, notice of any breach of, 
Default under or failure to comply with any material term under this Article 
V or any material adverse change in ActaMed's relationship with its major 
customers, suppliers, employees or other entity with which ActaMed has a 
business relationship;

                              (d)  with reasonable promptness, a notice of 
any default by ActaMed or any of its Subsidiaries under any material 
agreement to which it is a party;

                              (e)  with reasonable promptness, copies of all 
written materials furnished to directors;

                              (f)  promptly (but in any event within ten (10) 
days) after the filing of any document or material with the SEC, a copy of 
such document or material;

                              (g)  promptly after the record date set by the 
Board of Directors to determine the stockholders entitled to vote at 
ActaMed's annual meeting of stockholders (but in any event ten (10) days 
prior to such meeting), a list of all stockholders of ActaMed and their 
respective holdings; and


                                     -37-
<PAGE>

                              (h)  promptly upon request therefor, such other 
data, filings and information as the Permitted Owner may from time to time 
reasonably request.


                                   ARTICLE 6   

                               EMPLOYEE MATTERS


     SECTION 6.1    TERMINATION OF EMPLOYMENT BY SBCL AND OFFER OF EMPLOYMENT 
BY ACTAMED.  Effective as of the close of business on January 1, 1998 or such 
later date as mutually agreed by SBCL and ActaMed, but not later than January 
29, 1998 (the "Termination Date"), SBCL will terminate the employment of the 
individuals listed on Schedule VI.  As soon as practicable following the 
Region One Transfer Date, ActaMed will offer employment to each of the 
individuals listed on Schedule VI, which employment shall become effective as 
of the day following the Termination Date (the "Hire Date").  Each individual 
listed on Schedule VI who accepts ActaMed's offer of employment shall be 
referred to herein as a "Transferred Employee."  In connection with the 
termination of employment of the individuals listed on Schedule VI, SBCL 
shall take such action with respect to compensation and benefits for such 
individuals as described in the SBCL undertakings section of Schedule VI.

     SECTION 6.2    TRANSITIONAL EMPLOYEE LEASING ARRANGEMENT.  For each 
Transferred Employee, the "Transitional Employee Leasing Arrangement" shall 
extend for the period from the Hire Date until the earlier of:

                    6.2.1     the Transfer Date for the Region to which a 
Transferred Employee is assigned; or

                    6.2.2     five business days after the date SBCL provides 
written notice to ActaMed with respect to such Transferred Employee, if SBCL 
determines that it no longer wishes to have a Transferred Employee assigned 
to provide leased services to SBCL pursuant to this Agreement.

During the Transitional Employee Leasing Arrangement period, ActaMed shall 
require, as a condition of the continued employment of each Transferred 
Employee, that each Transferred Employee report to SBCL, and continue to 
comply with SBCL's policies and procedures in the course of each such 
Transferred Employee's employment by ActaMed.  Notwithstanding the foregoing, 
Transferred Employees shall be under ActaMed's supervision, direction and 
control, subject to the general oversight and guidance of SBCL.  In 
performing services for SBCL pursuant to this Article VI, the Transferred 
Employees shall have the status of common law employees of ActaMed, and 
neither the Transferred Employees nor ActaMed shall act as or be employees or 
agents of SBCL.


                                     -38-
<PAGE>

     SECTION 6.3    ACTAMED COMPENSATION AND BENEFITS.  ActaMed shall, out of 
its own funds, provide each Transferred Employee with compensation and 
benefits as set forth on Schedule VI.

     SECTION 6.4    PAST SERVICE CREDIT.  The service of each Transferred 
Employee with SBCL or any of its Affiliates shall be counted for purposes of 
determining eligibility to participate or to vest in benefits under any 
compensation or benefit plan, program or arrangement now or hereafter 
maintained by ActaMed to the same extent that such service was credited or 
otherwise counted under any Benefit Plan in which such Transferred Employee 
was eligible to participate with SBCL immediately prior to the Region One 
Transfer Date.

     SECTION 6.5    TERMINATION OF EMPLOYMENT; NONSOLICITATION; TERMINATION 
OF AGREEMENT.

                    6.5.1     ActaMed will not terminate without cause the 
employment of any Transferred Employee before the date determined under 
Section 6.2.1 or 6.2.2, without the advance written consent of SBCL.

                    6.5.2     ActaMed shall be responsible for assigning 
Transferred Employees to principal work locations, which shall be the same as 
the locations to which such Transferred Employees were assigned as of 
December 31, 1997.  Except as may otherwise be agreed by SBCL and ActaMed in 
a writing signed by the parties, SBCL shall make the business facilities to 
which Transferred Employees are currently assigned available to ActaMed for 
the purpose of location assignments of Transferred Employees until not later 
than the [*] anniversary of the Transfer Date of the Region to which a 
Transferred Employee is assigned.

                    6.5.3     SBCL shall not solicit the employment of, hire 
or employ any Transferred Employee until after the earlier of (i) such 
Transferred Employee's termination of employment by ActaMed with cause, (ii) 
such Transferred Employee's voluntary resignation from ActaMed, [*] (iii) [*] 
or (iv) the termination of this Assets Purchase Agreement pursuant to Section 
10.1, in which event ActaMed shall, at SBCL's request, use its best efforts 
to cooperate with SBCL in facilitating SBCL's solicitation to re-hire such 
Transferred Employees.

     SECTION 6.6    PAYMENT OF WAGE AND BENEFIT COSTS.

                    6.6.1     PERIOD FROM JANUARY 1, 1998 THROUGH THE HIRE 
DATE. For the period beginning January 1, 1998 and extending through the Hire 
Date, with respect to each individual identified on SCHEDULE VI as a 
Transferred Employee, ActaMed shall reimburse SBCL for such individuals' base 
salary, paid time off, the employer-paid portion of employment and 
unemployment insurance or taxes, the employer-paid portion of premiums 
payable with respect to all insured benefits, with respect to medical and 
dental benefits for individuals who participate in the self-insured medical 
and dental program sponsored by SBCL, the pro rated portion of the excess, if 
any, of a reasonable premium cost for such coverage, as determined by 

[*] CONFIDENTIAL TREATMENT REQUESTED

                                     -39-
<PAGE>

SBCL, over the amount paid by such individual for such coverage, the present 
value of additional accruals under the SmithKline Beecham Pension Plan, as 
determined by the Plan's actuary and employer contributions payable under the 
SmithKline Beecham Retirement Savings Plan. SBCL will bill such employee 
costs to ActaMed by or before January 31, 1998, and ActaMed will remit 
payment to SBCL for such employee costs within 30 days of receipt of the bill 
for such costs.

                    6.6.2     DURING TRANSITION.  Except as otherwise 
provided in SCHEDULE VI, SBCL will reimburse ActaMed for certain direct 
compensation and benefit costs incurred by ActaMed with respect to each 
Transferred Employee during the Transitional Employee Leasing Arrangement 
period (as hereinafter defined, the "Employee Costs").  For purposes of this 
Article VI, Employee Costs will include base salary, paid time off pursuant 
to the paid time off policy described in SCHEDULE VI, the employer-paid 
portion of employment and unemployment insurance or taxes, the employer-paid 
portion of premiums payable with respect to the insured benefits set forth on 
SCHEDULE VI, employer contributions made under any ActaMed qualified defined 
contribution plan, and with respect to short term disability benefits for 
individuals who participate in the self-insured short term disability plan 
sponsored by ActaMed, the pro rated portion of the excess, if any, of a 
reasonable premium cost for such coverage, as determined by ActaMed, over the 
amount paid by such individual for such coverage. In addition, for each 
Transferred Employee, for each of 1998 and 1999, Employee Costs will include 
an amount equal to [*] of [*] to such Transferred Employee [*], the [*] is 
the [*] during which such Transferred Employee was [*], and the [*].  ActaMed 
will bill such Employee Costs to SBCL monthly, and SBCL will remit payment to 
ActaMed for such Employee Costs within 30 days of receipt of the bill for 
such costs.  

                    6.6.3     STAY BONUS AND BONUS.

                              (a)  Stay Bonus.  SBCL will reimburse ActaMed 
for [*] of the stay bonus payments described in SCHEDULE VI and actually made 
by ActaMed within thirty (30) days following SBCL's receipt of the bill for 
such costs.

                              (b)  Bonus.  ActaMed will pay, and SBCL will 
reimburse ActaMed for, bonus payments as described in the bonus provisions of 
SCHEDULE VI.

     SECTION 6.7    TAXES, UNEMPLOYMENT INSURANCE AND RELATED ITEMS.  ActaMed 
agrees to accept and hereby accepts full and exclusive responsibility for the 
payment of any and all contributions or taxes, or both, for any unemployment 
insurance or taxes, medical and old age retirement benefits, pensions or 
annuities now or hereafter imposed under any law of the United States or any 
State, which are measured by the wages, salaries or other remuneration paid 
to persons employed by ActaMed on the work covered by this Article VI or in 
any way connected 

[*] CONFIDENTIAL TREATMENT REQUESTED

                                     -40-
<PAGE>

therewith; and ActaMed shall reimburse SBCL for any of the contributions or 
taxes, or both, or any part thereof, if SBCL may be required by law to pay 
the same or any part thereof.

     SECTION 6.8    EXAMINATION AND AUDIT.  For the Transitional Employee
Leasing Arrangement period, and for three calendar years after final payment is
made to ActaMed by SBCL pursuant to Section 6.6, ActaMed shall establish and
maintain relevant books, records, payroll records, receipts, documents, papers
and any other data or information which support and substantiate the charges
made to and payments received from SBCL under Section 6.2.  During such time,
SBCL or its designated representative shall have access to and the right to
examine any relevant books, records, documents, papers, receipts and any other
data or information of ActaMed relating to ActaMed's obligations under this
Article VI.

                                      ARTICLE 7   

                    CONDITIONS PRECEDENT TO OBLIGATIONS OF ACTAMED

     SECTION 7.1    CONDITIONS PRECEDENT TO OBLIGATIONS OF ACTAMED.  The
obligations of ActaMed to consummate the transactions contemplated by this
Assets Purchase Agreement shall be subject to the satisfaction, on or before the
Applicable Transfer Date, of each and every one of the following conditions, all
or any of which may be waived, in whole or in part, by ActaMed for purposes of
consummating such transactions, but without prejudice to any other right or
remedy which ActaMed may have hereunder as a result of any misrepresentation by,
or breach of any agreement, covenant or warranty of SBCL contained in this
Assets Purchase Agreement or any Schedule, certificate or instrument furnished
or caused to be furnished by SBCL hereunder.

                    7.1.1     REPRESENTATIONS TRUE. The representations and 
warranties made by SBCL in this Assets Purchase Agreement, with any 
exceptions set forth in the Disclosure Schedules attached to the Compliance 
Certificate, shall be true and correct in all material respects on the 
Applicable Transfer Date, with the same force and effect as if such 
representations and warranties had been made on and as of such Applicable 
Transfer Date.  The Disclosure Schedules shall not identify any item 
indicating that the business or financial condition of SBCL or SBCL's 
provision of or ability to provide Lab EDI Services to SBCL Sites has been 
materially and adversely impacted, or which would impair SBCL's ability to 
perform its obligations hereunder, including its ability to deliver the SCAN 
Assets to ActaMed.

                    7.1.2     COVENANTS.  All of the terms, covenants and
conditions in this Assets Purchase Agreement and the other SBCL Documents to be
complied with or performed by SBCL on or prior to the Region One Transfer Date
shall have been complied with and performed in all material respects.

                    7.1.3     NO INJUNCTION, ETC.  No action, proceeding,
investigation or Regulation shall have been instituted, threatened or proposed
before any court, governmental 


                                      -41-
<PAGE>

agency or legislative body to enjoin, restrain, prohibit, or obtain 
substantial damages in respect of, or which is related to, or arises out of, 
this Assets Purchase Agreement or the consummation of the transactions 
contemplated hereby, or which is related to or arises out of the provision of 
Lab EDI Services, if such action, proceeding, investigation or Regulation, in 
the reasonable judgment of ActaMed, would make it inadvisable to consummate 
the transactions contemplated on such Transfer Date.

                    7.1.4     APPROVAL OF LEGAL MATTERS.  All actions,
proceedings, instruments and documents deemed necessary or appropriate by
ActaMed or their counsel to effectuate this Assets Purchase Agreement and the
consummation of the transactions contemplated hereby, or incidental thereto, and
all other related legal matters, shall have been approved by such counsel. 

                    7.1.5     GOVERNMENTAL APPROVALS.  All governmental and
other consents and approvals, if any, necessary to permit the consummation of
the transactions contemplated by this Assets Purchase Agreement on such Transfer
Date shall have been received by ActaMed.

     SECTION 7.2    CONDITIONS PRECEDENT TO THE OBLIGATIONS OF SBCL.  The
obligations of SBCL to consummate the transactions contemplated by this Assets
Purchase Agreement shall be subject to the satisfaction, on or before each
Transfer Date, of each and every one of the following conditions, all or any of
which may be waived, in whole or in part, by SBCL for purposes of consummating
such transactions, but without prejudice to any other right or remedy which SBCL
may have hereunder as a result of any misrepresentation by, or breach of any
agreement, covenant or warranty of ActaMed contained in this Assets Purchase
Agreement, or any certificate or instrument furnished by it hereunder.

                    7.2.1     REPRESENTATIONS TRUE.  The representations and
warranties made by ActaMed in this Assets Purchase Agreement, with any
exceptions set forth in the Disclosure Schedules attached to the Compliance
Certificate, shall be true and correct in all material respects on the
Applicable Transfer Date, with the same force and effect as if such
representations and warranties had been made on and as of such Applicable
Transfer Date.  The Disclosure Schedules shall not identify any item indicating
that the business or financial condition of ActaMed has been materially and
adversely impacted, or which would impair ActaMed's ability to perform its
obligations hereunder.

                    7.2.2     COVENANTS.  All of the terms, covenants and
conditions in the ActaMed Documents to be complied with or performed by ActaMed
on or prior to the Transfer Date shall have been complied with and performed in
all material respects.

                    7.2.3     NO INJUNCTION, ETC.  No action, proceeding,
investigation or Regulation shall have been instituted, threatened or proposed
before any court, governmental agency or legislative body to enjoin, restrain,
prohibit, or obtain substantial damages in respect of, or which is related to,
or arises out of, this Assets Purchase Agreement or the consummation of the
transactions contemplated hereby, or which is related to or arises out of the
business of ActaMed, if such action, proceeding, investigation or Regulation, in
the reasonable judgment of 


                                     -42-
<PAGE>

SBCL, would make it inadvisable to consummate the transactions contemplated 
on such Transfer Date.

                    7.2.4     APPROVAL OF LEGAL MATTERS.  All actions,
proceedings, instruments and documents deemed necessary or appropriate by SBCL
or its counsel to effectuate this Assets Purchase Agreement and the consummation
of the transactions contemplated hereby, or incidental hereto, and all other
related legal matters, shall have been approved by such counsel.

                    7.2.5     GOVERNMENTAL APPROVALS.  All governmental and
other consents and approvals, if any, necessary to permit the consummation of
the transactions contemplated by this Assets Purchase Agreement shall have been
received by SBCL.

                                      ARTICLE 8   

                SURVIVAL OF REPRESENTATIONS, WARRANTIES AND COVENANTS

                                 AND INDEMNIFICATION

     SECTION 8.1    SURVIVAL OF REPRESENTATIONS, WARRANTIES AND COVENANTS.

                    8.1.1     SURVIVAL OF SBCL REPRESENTATIONS, WARRANTIES 
AND COVENANTS. ActaMed and SBCL acknowledge and agree that, as contemplated 
by Section 4.3.1, prior to each of the Transfer Dates, ActaMed intends to 
perform such investigation of the SCAN Assets to be transferred on such 
Transfer Date and related Lab EDI Services provided by SBCL as ActaMed may 
deem appropriate; PROVIDED, HOWEVER, no investigation by ActaMed shall 
diminish or otherwise affect any of the representations, warranties, 
covenants or agreements made or to be performed by SBCL pursuant to this 
Assets Purchase Agreement or ActaMed's right to rely fully upon such 
representations, warranties, covenants and agreements.  All such 
representations, warranties, covenants and agreements made or to be performed 
by SBCL pursuant to this Assets Purchase Agreement shall survive the 
execution and delivery hereof and each of the Transfer Dates hereunder 
indefinitely except to the extent limited by this Section 8.1.1.  The 
representations and warranties shall terminate and expire, (a) with respect 
to any General Claim based on a breach thereof (other than one based on a 
breach of Section 3.1.3 hereof) with respect to which a Claims Notice has not 
been given, after [*] from the Transfer Date of the SCAN Assets as to which 
the representation and warranty was made, (b) with respect to any General 
Claim based upon a breach of Section 3.1.3 hereof, after the earlier of (i) 
[*] or (ii) [*] days after the Region Four Transfer Date, and (c) with 
respect to a Tax Claim, on the later of (i) the [*] after the date upon which 
the Liability to which any such Tax Claim may relate is barred by all 
applicable statutes of limitation and (ii) the [*] after the date upon which 
any claim for refund or credit related to such Tax Claim is barred by all 
applicable statutes of limitation.  A Claims Notice for a General Claim based 
on a breach of covenant may be given at any time up to the [*] of the date on 
which the breach of such covenant occurred.  With respect to any Ownership 
Claim, Undisclosed Liability Claim or any type of claim not specifically 
addressed

[*] CONFIDENTIAL TREATMENT REQUESTED

                                     -43-
<PAGE>

above, such representations, warranties, covenants and agreements shall 
survive without limit of time.

                    8.1.2     SURVIVAL OF ACTAMED REPRESENTATIONS, WARRANTIES 
AND COVENANTS. All the representations, warranties, covenants and agreements, 
made or to be performed by ActaMed  pursuant to this Assets Purchase 
Agreement shall survive the execution and delivery hereof indefinitely except 
to the extent limited by this Section 8.1.2.   No investigation by SBCL shall 
diminish or otherwise affect any of the representations, warranties, 
covenants or agreements made or to be performed by ActaMed pursuant to this 
Assets Purchase Agreement or SBCL's right to rely fully upon such 
representations, warranties, covenants and agreements.  All such 
representations, warranties, covenants and agreements shall be considered to 
have been relied upon by SBCL and shall survive the delivery to SBCL of the 
shares of Series D Preferred Stock (and the Conversion Shares).  The 
representations and warranties shall terminate and expire (a) with respect to 
a General Claim based on a breach thereof for which a Claims Notice has not 
been given, after [*] from the Transfer Date with respect to which such 
representation and warranty was made, (b) with respect to a Tax Claim, on the 
later of (i) the [*] after the date upon which the Liability to which any 
such Tax Claim may relate is barred by all applicable statutes of limitation 
and (ii) the [*] after the date upon which any claim for refund or credit 
related to such Tax Claim is barred by all applicable statutes of limitation 
and (c) with respect to the covenants of ActaMed set forth in Sections 5.1.3 
and 5.1.6 hereof, upon the closing of a Public Offering.  A Claims Notice for 
a General Claim based on a breach of covenant may be given at any time up to 
the [*] of the date on which the breach of such covenant occurred.  With 
respect to any Ownership Claim, Undisclosed Liability Claim or any type of 
claim not specifically addressed above, such representations, warranties, 
covenants and agreements shall survive without limit of time.

     SECTION 8.2    OBLIGATION TO INDEMNIFY.

                    8.2.1     OBLIGATIONS OF SBCL TO INDEMNIFY.  Subject to the
limitations of Sections 8.1.1, 8.2.6 and 8.2.9, SBCL agrees to indemnify and
hold harmless each ActaMed Indemnitee against and in respect of:

                              (a)  all Losses imposed upon or incurred by any
ActaMed Indemnitee by reason of or resulting from:

                                   (i)    a breach of any representation or
warranty of  SBCL contained in or made pursuant to this Assets Purchase
Agreement other than the representation contained in Section 3.1.3(a); or 

                                   (ii)   any nonfulfillment of any covenant or
agreement of SBCL contained in or made pursuant to this Assets Purchase
Agreement; or

                                   (iii)  any Liability of SBCL not assumed by
ActaMed hereunder, including without limitation any Liability for any Taxes
attributable to ownership of 

[*] CONFIDENTIAL TREATMENT REQUESTED

                                     -44-
<PAGE>

SCAN Assets or SBCL's provision of Lab EDI Services in a Region prior to its 
Transfer Date in accordance herewith. 

                              (b)  any and all actions, suits, claims,
proceedings, investigations, demands, assessments, audits, fines, judgments,
costs and other expenses (including, without limitation, reasonable legal fees
and expenses) incident to any Loss in connection with Section 8.2.1(a) or to the
enforcement of this Section 8.2.1; 

                              (c)  all Losses imposed upon or incurred by any
ActaMed Indemnitee by reason of or resulting from any Litigation pending or
threatened, arising out of or relating to the provision of Lab EDI Services at
an SBCL Site hereunder, regardless of whether it is disclosed in any Section of
the Disclosure Schedule called for by Section 3.1 or Section 2.5.2 hereof;
PROVIDED, HOWEVER that, to the extent that any such Loss arises out of the
actions of a Transferred Employee, SBCL shall only be obligated to indemnify and
hold harmless an ActaMed Indemnitee hereunder if such Transferred Employee was
acting subject to SBCL's general oversight and guidance pursuant to Section 6.2
hereof.

                    8.2.2     OBLIGATION OF ACTAMED TO INDEMNIFY.  Subject to
the limitations of Section 8.1.2 and Section 8.2.6, ActaMed agrees to indemnify
and hold harmless each SBCL Indemnitee against and in respect of:

                              (a)  all Losses imposed upon or incurred by any
SBCL Indemnitee by reason of or resulting from:

                                   (i)    a breach of any representation or
warranty of ActaMed contained in or made pursuant to this Assets Purchase
Agreement; or 

                                   (ii)   any nonfulfillment of any covenant or
agreement of ActaMed contained in or made pursuant to this Assets Purchase
Agreement; and

                                   (iii)  any Liability of ActaMed (other than
a Liability indemnified by SBCL pursuant to Section 8.2.1) attributable to
ownership of SCAN Assets or ActaMed's provision of Lab EDI Services in a Region
after its Transfer Date in accordance herewith; PROVIDED that if the Services
Agreement provides for indemnification for any such Liability, then no such
claim shall be brought hereunder. 

                              (b)  any and all actions, suits, claims,
proceedings, investigations, demands, assessments, audits, fines, judgments,
costs and other expenses (including, without limitation, reasonable legal fees
and expenses) incident to any Loss in connection with Section 8.2.2(a) or to the
enforcement of this Section 8.2.2.

                              (c)  all Losses imposed upon or incurred by any
SBCL Indemnitee by reason of or resulting from any Litigation pending or
threatened, arising out of or relating to use of SCAN Assets at an ActaMed Site


                                     -45-
<PAGE>

after such site became an ActaMed Site hereunder, regardless of whether it is 
disclosed in the Disclosure Schedule by reason of Section 3.2 or Section 
2.6.3 hereof.

                              (d)  all Losses imposed upon or incurred by SBCL
by reason of SBCL premises being used by Transferred Employees on or after the
Hire Date.

                    8.2.3     CLAIMS NOTICE.  A Claim shall be made by any
Indemnitee by delivery of a Claims Notice to the Indemnifying Party requesting
indemnification and specifying the basis on which indemnification is sought and
the amount of asserted Losses and, in the case of a Third Party Claim,
containing (by attachment or otherwise) such other information as such
Indemnitee shall have concerning such Third Party Claim.  

                    8.2.4     PROCEDURES INVOLVING NON-THIRD PARTY CLAIMS.  If
the Claim involves a matter other than a Third Party Claim, the Indemnifying
Party shall have forty-five (45) days to object to such Claim by delivery of a
written notice of such objection to such Indemnitee specifying in reasonable
detail the basis for such objection.  If an objection is timely made by the
Indemnifying Party, the Indemnifying Party and the Indemnitee shall cooperate in
the compromise of the Claim with ultimate resolution of the validity of such
Claim to be determined under Article IX.  Failure to object in a timely manner
shall constitute a final and binding acceptance of the Claim by the Indemnifying
Party on behalf of all Indemnitors, and the Claim shall be paid in accordance
with Section 8.2.8 hereof.

                    8.2.5     PROCEDURES INVOLVING THIRD PARTY CLAIMS.  The
obligations and liabilities of the parties hereunder with respect to a Third
Party Claim shall be subject to the following terms and conditions:

                              (a)  The Indemnitee shall give the Indemnifying
Party written notice of a Third Party Claim promptly after receipt by the
Indemnitee of notice thereof, and the Indemnifying Party may undertake the
defense, compromise and settlement thereof by representatives of its own
choosing reasonably acceptable to the Indemnitee.  The failure of the Indemnitee
to notify the Indemnifying Party of such claim shall not relieve the
Indemnifying Party of any liability that it may have with respect to such claim
except to the extent the Indemnifying Party demonstrates that the defense of
such claim is prejudiced by such failure.  The assumption of the defense,
compromise and settlement of any such Third Party Claim by the Indemnifying
Party shall be an acknowledgment of the obligation of the Indemnifying Party to
indemnify the Indemnitee with respect to such claim hereunder.  If the
Indemnitee desires to participate in, but not control, any such defense,
compromise and settlement, it may do so at its sole cost and expense.  If,
however, the Indemnifying Party fails or refuses to undertake the defense of
such Third Party Claim within ten (10) days after written notice of such claim
has been given to the Indemnifying Party by the Indemnitee, the Indemnitee shall
have the right to undertake the defense, compromise and settlement of such claim
with counsel of its own choosing. In the circumstances described in the
preceding sentence, the Indemnitee shall, promptly upon its assumption of the
defense of such claim, make a Claim as specified in 


                                      -46-
<PAGE>

Section 8.2.1(b) or 8.2.2(b) which shall be deemed a Claim that is not a 
Third Party Claim for the purposes of the procedures set forth herein.

                              (b)  If, in the reasonable opinion of the
Indemnitee, any Third Party Claim or the litigation or resolution thereof
involves an issue or matter which could have a material adverse effect on the
business, operations, assets, properties or prospects of the Indemnitee
(including, without limitation, the administration of the tax returns and
responsibilities under the tax laws of the Indemnitee), the Indemnitee shall
have the right to control the defense, compromise and settlement of such Third
Party Claim undertaken by the Indemnifying Party, and the reasonable costs and
expenses of the Indemnitee in connection therewith shall be included as part of
the indemnification obligations of the Indemnifying Party hereunder.  If the
Indemnitee shall elect to exercise such right, the Indemnifying Party shall have
the right to participate in, but not control, the defense, compromise and
settlement of such Third Party Claim at its sole cost and expense.

                              (c)  No settlement of a Third Party Claim
involving the asserted liability of the Indemnifying Party under this Article
shall be made without the prior written consent by or on behalf of the
Indemnifying Party, which consent shall not be unreasonably withheld or delayed.
If the Indemnifying Party assumes the defense of such a Third Party Claim, (1)
no compromise or settlement thereof may be effected by the Indemnifying Party
without the Indemnitee's consent unless (a) there is no finding or admission of
any violation of law or any violation of the rights of any Person and no effect
on any other claim that may be made against the Indemnitee (b) the sole relief
provided is monetary damages that are paid in full by the Indemnifying Party and
(c) the compromise or settlement includes, as an unconditional term thereof, the
giving by the claimant or the plaintiff to the Indemnitee of a release, in form
and substance reasonably satisfactory to the Indemnitee, from all liability in
respect of such Third Party Claim, and (2) the Indemnitee shall have no
liability with respect to any compromise or settlement thereof effected without
its consent.

                    8.2.6     LIMITATIONS ON INDEMNIFICATION.

                              (a)  No Party to this Assets Purchase Agreement
shall be entitled to indemnification under this Assets Purchase Agreement to the
extent that such Party's Losses are increased or extended by the willful
misconduct, violation of law or bad faith of such Party.

                              (b)  No Indemnifying Party shall be required to 
indemnify an Indemnitee with respect to any Loss arising out of or with 
respect to a Claim unless the amount of such Loss, when aggregated with all 
other such Losses, shall (i) exceed [*], at which time Claims may be asserted 
to the extent that all Losses or Asserted Liabilities are in excess of such 
threshold amount; PROVIDED, however, that such threshold amount shall not 
apply to any (a) Loss which results from or arises out of an Ownership Claim, 
a Tax Claim or Undisclosed Liability Claim, (b) Loss which results from or 
arises out of fraud or intentional misrepresentation or an intentional breach 
of a representation, 

[*] CONFIDENTIAL TREATMENT REQUESTED

                                     -47-
<PAGE>

warranty, covenant or agreement in this Assets Purchase Agreement; (c) Claim 
which is based upon Section 8.2.1(a)(iii) or 8.2.2(a)(iii) or (d) Loss which 
results from or arises out of any Litigation incident to any of the matters 
referred to in the foregoing clauses (a) and (b); and (ii) be less than [*], 
PROVIDED that such cap shall not apply to (a) a General Claim which is based 
upon a breach by SBCL of its representations and warranties set forth in 
Sections 3.1.7(a) or (b) hereof or a breach of its covenant set forth in 
Section 4.4 hereof, (b) a General Claim which is based upon a breach by 
ActaMed of its representation and warranty set forth in Section 3.2.14 or a 
breach of its covenant set forth in Section 4.4 hereof, or (c) a Claim which 
is based upon Section 8.2.1(a)(iii) or 8.2.2(a)(iii).  Notwithstanding the 
foregoing, for any breach of Section 3.1.6(a)-(c), SBCL shall indemnify each 
ActaMed Indemnitee for any individual Loss in excess of [*] per item of 
tangible personal property and any aggregate Loss exceeding [*] for items of 
tangible personal property. 

                    8.2.7     NO RELEASE FOR FRAUD.  Nothing contained in this
Assets Purchase Agreement shall relieve or limit the liability of any Party or
any officer or director of such Party from any Liability arising out of or
resulting from common law fraud or intentional misrepresentation in connection
with the transactions contemplated by this Assets Purchase Agreement or in
connection with the delivery of any of the Transaction Documents.  Each Party
shall have a right to indemnification for any Loss incurred as the result of any
common law fraud or intentional misrepresentation by any other Party or any
officer or director of such other Party without regard to the Threshold Amount,
the maximum liability or any period of limitation.

                    8.2.8     PAYMENT.

                              (a)  If any Party is required to make any payment
under this Article, such Party shall promptly pay the Indemnified Party the
amount so determined.  If there is a dispute as to the amount or manner of
determination of any indemnity obligation owed under this Article, the
Indemnifying Party shall nevertheless pay when due such portion, if any, of the
obligation as shall not be subject to dispute.  The difference, if any, between
the amount of the obligation ultimately determined as properly payable under
this Article and the portion, if any, theretofore paid shall bear interest as
provided in Section 8.2.8(c).

                              (b)  Any items as to which an Indemnified Party is
entitled to payment under this Article may be paid by set-off against amounts
payable to the Indemnifying Party to the extent that such amounts are sufficient
to pay such items.

                              (c)  If all or part of any indemnification
obligation under this Assets Purchase Agreement is not paid when due, then the
Indemnifying Party shall pay the Indemnified Party interest on the unpaid
principal amount of the obligation from the date the amount became due until
payment in full, at the per annum rate of interest announced from time to time
by NationsBank South, N.A., to be its "prime rate."

[*] CONFIDENTIAL TREATMENT REQUESTED

                                     -48-
<PAGE>

                    8.2.9   SPECIAL INDEMNITY AS TO PROJECTIONS. 
Notwithstanding Section 8.2.6(b), SBCL shall pay to ActaMed any amount by 
which (x) the aggregate general expenses incurred by ActaMed for goods and 
services reflected on SCHEDULE 3.1.3 under the Subtotals [*] in connection 
with ActaMed's provision of Lab EDI Services to the Fixed Fee Sites (as 
defined in the Services Agreement), taking into account that the Projections 
are based on [*] SCAN Sites, the number of SCAN Sites actually transferred to 
ActaMed and the staging of their transfer, excluding one-time or 
transactional expenses (which amount shall include any expenses incurred with 
respect to this transaction), and less any increased expenses incurred as a 
result of providing the Agreed Services (as defined in the Services 
Agreement) in a different manner than SBCL did prior to the transfer of such 
SCAN Sites exceeds (y) [*] of the Projections.

                    8.2.10  EXCLUSIVE REMEDY.  Except for equitable remedies 
and any action for common law fraud, the remedies provided in this Article 
constitute the sole and exclusive remedies for recovery against the 
Indemnifying Party based upon this Assets Purchase Agreement.

                                  ARTICLE 9

                              DISPUTE RESOLUTION

     SECTION 9.1  INFORMAL DISPUTE RESOLUTION.  Any dispute between the 
parties arising out of or with respect to this Assets Purchase Agreement, 
either with respect to the interpretation of any provision of this Assets 
Purchase Agreement or with respect to the performance by ActaMed or SBCL, 
shall be resolved as provided in this Article.

                    9.1.1   INFORMAL DISPUTE RESOLUTION.  Prior to the 
initiation of formal dispute resolution procedures, the parties shall first 
attempt to resolve their dispute informally, as follows:

                             (a)  The Relationship Managers for each Party 
shall meet for the purpose of endeavoring to resolve such dispute.  They 
shall meet as often as the parties reasonably deem necessary in order to 
gather and furnish to the other all information with respect to the matter in 
issue which the parties believe to be appropriate and germane in connection 
with its resolution.  The Relationship Managers shall discuss the problem and 
negotiate in good faith in an effort to resolve the dispute without the 
necessity of any formal proceeding.  During the course of negotiations, all 
reasonable requests made by one Party to another for nonprivileged 
information, reasonably related to this Assets Purchase Agreement, shall be 
honored in order that each of the parties may be fully advised of the other's 
position.

                             (b)  If, within fifteen (15) days after a matter 
has been identified for resolution pursuant to this Article, either of the 
Relationship Managers concludes in good faith that amicable resolution 
through continued negotiation in this forum does not appear likely, 

[*] CONFIDENTIAL TREATMENT REQUESTED

                                     -49-
<PAGE>

the matter will be escalated by formal written notification to the SBCL 
President and the ActaMed President.  The Parties will use their respective 
best efforts to cause the SBCL President and the ActaMed President to meet to 
attempt to resolve the dispute.

                             (c)  Formal proceedings for the resolution of a 
dispute may not be commenced until the earlier of: (i) the date on which the 
SBCL President and the ActaMed President conclude in good faith that amicable 
resolution through continued negotiation of the matter does not appear 
likely; or (ii) thirty (30) days after the dispute has been referred to the 
SBCL President and the ActaMed President.

                    9.1.2  FORMAL PROCEEDINGS PERMITTED.  The provisions of 
this Section 9.1 shall not be construed to prevent a party from instituting, 
and a party being authorized to institute, formal proceedings earlier to 
avoid the expiration of any applicable limitations period or any period 
provided for in Section 8.1.

     SECTION 9.2  ARBITRATION.  If the parties are unable to resolve any 
controversy arising under this Assets Purchase Agreement as contemplated by 
Section 9.1 and if such controversy is not subject to Article VIII or Section 
9.3, then such controversy shall be submitted to mandatory and binding 
arbitration at the election of either party (the "Disputing Party") pursuant 
to the following conditions:

                    9.2.1  SELECTION AND REPLACEMENT OF ARBITRATORS.  The 
Disputing Party shall notify the AAA and the other party in writing 
describing in reasonable detail the nature of the dispute (the "DISPUTE 
NOTICE").  Each of the parties shall select a neutral arbitrator in 
accordance with the rules of AAA, and the two arbitrators so selected shall 
select a third neutral arbitrator (the three arbitrators referred to in this 
Section being hereinafter referred to as the "PANEL").

                    9.2.2  CONDUCT OF ARBITRATION.  The Panel shall allow 
reasonable discovery as permitted by the Federal Rules of Civil Procedure, to 
the extent consistent with the purpose of the arbitration.  The panel shall 
have no power or authority to amend or disregard any provision of this 
Section.  The arbitration hearing shall be commenced promptly and conducted 
expeditiously, with each of ActaMed and SBCL being allocated one-half of the 
time for the presentation of its case.  Unless otherwise agreed to by the 
parties, an arbitration hearing shall be conducted on consecutive days.

                    9.2.3  REPLACEMENT OF ARBITRATOR.  Should an arbitrator 
refuse or be unable to proceed with arbitration proceedings as called for by 
this Section, such arbitrator shall be replaced by an arbitrator selected in 
accordance with the rules of the AAA.

                    9.2.4  FINDINGS AND CONCLUSIONS.  The Panel rendering 
judgment upon disputes between parties as provided in this Section shall, 
after reaching judgment and award, prepare and distribute to the parties a 
writing describing the findings of fact and conclusions of law relevant to 
such judgment and award and containing an opinion setting forth the reasons 
for 

                                     -50-
<PAGE>

the giving or denial of any award.  The award of the Panel shall be final and 
binding on the parties, and judgment thereon may be entered in a court of 
competent jurisdiction.

                    9.2.5  PLACE OF ARBITRATION HEARINGS.  Arbitration 
hearings hereunder shall be held in Washington, D.C.

                    9.2.6  TIME OF THE ESSENCE.  The Panel is instructed that 
time is of the essence in the arbitration proceeding.  The Panel shall render 
its judgment or award within fifteen (15) days following the conclusion of 
the hearing.  Recognizing the express desire of the parties for an 
expeditious means of dispute resolution, the Panel shall limit or allow the 
parties to expand the scope of discovery as may be reasonable under the 
circumstances.

     SECTION 9.3  LITIGATION.

                    9.3.1  IMMEDIATE INJUNCTIVE RELIEF.  In the event of a 
breach of the confidentiality obligations set forth in this Assets Purchase 
Agreement, or in the event a party makes a good faith determination that a 
breach of the terms of this Assets Purchase Agreement by the other party is 
such that the damages to such party resulting from the breach will be so 
immediate, so large or severe, and so incapable of adequate redress after the 
fact that a temporary restraining order or other immediate injunctive relief 
is a necessary remedy, then such party may file a pleading with a court 
seeking immediate injunctive relief.  If a party files a pleading with a 
court seeking immediate injunctive relief and this pleading is challenged by 
the other party and the injunctive relief sought is not awarded in 
substantial part (or in the event of a temporary restraining order is vacated 
upon challenge by the other party), the party filing the pleading seeking 
immediate injunctive relief shall pay all of the costs and attorneys' fees of 
the party successfully challenging the pleading.

                    9.3.2  JURISDICTION.  ActaMed and SBCL each consent to 
venue in Philadelphia, Pennsylvania and to the nonexclusive jurisdiction of 
competent Pennsylvania state courts or federal courts located in Philadelphia 
for all litigation which may be brought, subject to the requirement for 
arbitration hereunder, with respect to the terms of, and the transactions and 
relationships contemplated by, this Assets Purchase Agreement. 

                                  ARTICLE 10

                                 TERMINATION

     SECTION 10.1  TERMINATION.

                    10.1.1  METHOD OF TERMINATION.  This Assets Purchase 
Agreement and the transactions contemplated hereby may be terminated at any 
time prior to a Transfer Date:

                            (a)  by the mutual consent of SBCL and ActaMed;

                                     -51-
<PAGE>

                            (b)  by SBCL by written notice of termination to 
ActaMed given after ActaMed shall have failed to meet the Transfer Benchmarks 
with respect to a Region by any applicable Measurement Date;

                            (c)  by ActaMed, if SBCL shall (1) fail to 
perform in any material respect its agreements contained herein required to 
be performed by it on or prior to such Transfer Date, or (2) materially 
breach any of its representations, warranties or covenants contained herein;

                            (d)  by SBCL, if ActaMed shall (1) fail to 
perform in any material respect its agreements contained herein required to 
be performed by it on or prior to such Transfer Date, or (2) materially 
breach any of its representations, warranties or covenants contained herein; 

                            (e)  by either SBCL or ActaMed if there shall be 
any order, writ, injunction or decree of any court or governmental or 
regulatory agency binding on ActaMed or SBCL which prohibits or restrains 
ActaMed or SBCL from consummating the transactions contemplated by this 
Assets Purchase Agreement, provided that ActaMed and SBCL shall have used 
their best efforts to have any such order, writ, injunction or decree lifted 
and the same shall not have been lifted within thirty (30) days after entry;

                            (f)  by SBCL if SBCL terminates the Services 
Agreement; or

                            (g)  by ActaMed if ActaMed terminates the 
Services Agreement.

                    10.1.2  NOTICE OF TERMINATION.  Notice of termination of 
this Assets Purchase Agreement, as provided for in this Article, shall be 
given by the party so terminating to the other party in accordance with 
Section 11.1.1 of this Assets Purchase Agreement.  Any such termination shall 
be effective as of the date of such notice, unless otherwise provided in such 
notice.

                    10.1.3  EFFECT OF TERMINATION.  If this Assets Purchase 
Agreement is terminated pursuant to Section 10.1 then, with respect to all 
transactions contemplated by this Assets Purchase Agreement as to which no 
Transfer Date has occurred (the "Future Transfers"), the obligations of the 
parties as to such Future Transfers shall become void and of no further force 
and effect, and each party shall pay the costs and expenses incurred by it in 
connection with this Assets Purchase Agreement as set forth herein and no 
party (nor any of its officers, directors, employees, agents, representatives 
or stockholders) shall be liable to any other party for any costs, expenses, 
damages (direct or indirect) or loss of anticipated profits for Future 
Transfers.

     SECTION 10.2  RISK OF LOSS.  SBCL assumes all risk of destruction, loss 
or damage due to fire or other casualty to the SCAN Assets located at SBCL 
Sites. SBCL shall remit all insurance proceeds relating to SCAN Assets not 
transferred by reason of such destruction, loss or 

                                     -52-
<PAGE>

damage to ActaMed.  If ActaMed and SBCL are unable to agree upon the amount 
of such insurance proceeds applicable to the affected SCAN Assets, the 
dispute shall be resolved jointly by the independent accounting firms then 
employed by ActaMed and SBCL, and if said accounting firms do not agree, they 
shall appoint a nationally recognized accounting firm, whose determination of 
the dispute shall be final and binding.

                                  ARTICLE 11  

                                 MISCELLANEOUS

     SECTION 11.1  GENERAL PROVISIONS.


                    11.1.1  NOTICES.  All notices, requests, demands and 
other communications hereunder shall be in writing and shall be deemed to 
have been given if (1) delivered by hand or if mailed by United States 
registered or certified mail, return receipt requested, first class postage 
prepaid, (2) sent by Federal Express or similar overnight courier service to 
the parties or their assignees, or (3) sent by telecopy to the number set 
forth below and promptly followed by a written copy sent by any other means 
specified herein, addressed as follows:

                    If to SBCL:


                              SmithKline Beecham Clinical Laboratories, Inc.
                              1201 South Collegeville Road
                              Collegeville, PA 19426
                              Attention: John B. Okkerse, Jr., PhD, President
                              Telephone: [*]
                              Telecopy:  [*]

                    with a copy to:

                              SmithKline Beecham Corporation 
                              One Franklin Plaza
                              16th and Race Streets
                              Philadelphia, PA 19103
                              Attention: General Counsel-U.S.
                              Telephone: [*]
                              Telecopy:  [*]

[*] CONFIDENTIAL TREATMENT REQUESTED


                                     -53-
<PAGE>

                              If to ActaMed:

                              ActaMed Corporation
                              Suite 600
                              7000 Central Parkway
                              Atlanta, Georgia  30328
                              Attention:  Chief Financial Officer
                              Telephone: (770) 352-1600
                              Telecopy:  (770) 352-1815

                    with a copy to:

                              Alston & Bird
                              One Atlantic Center
                              1201 West Peachtree Street
                              Atlanta, Georgia  30309-3424
                              Attention:  John C. Weitnauer, Esq.
                              Telephone:  (404) 881-7780
                              Telecopy Number:  (404) 881-7777

                              (a)  If delivered personally, the date on which 
a notice, request, instruction or document is delivered shall be the date on 
which such delivery is made and, if delivered by mail, telecopy, Federal 
Express or other overnight courier, the date on which such notice, request, 
instruction or document is first received shall be the date of delivery.

                              (b)  Any party hereto may change its address 
specified for notices herein by designating a new address by notice in 
accordance with this Section 11.1.

                              (c)  Failure of any party to send a copy of any 
notice to counsel for the other Party shall not affect in any way the 
validity of such notice to other party.

                    11.1.2  FURTHER ASSURANCES.  Each party covenants that at 
any time, and from time to time, after any Transfer Date, it will execute 
such additional instruments and take such actions as may be reasonably 
requested by the other party to confirm or perfect or otherwise to carry out 
the intent and purposes of this Assets Purchase Agreement.

                    11.1.3  WAIVER.  Any failure on the part of any party 
hereto to comply with any of its obligations, agreements or conditions 
hereunder may be waived by any other party to whom such compliance is owed.  
No waiver of any provision of this Assets Purchase Agreement shall be deemed, 
or shall constitute, a waiver of any other provision, whether or not similar, 
nor shall any waiver constitute a continuing waiver.

                    11.1.4  ASSIGNMENT.  This Assets Purchase Agreement shall 
not be assignable by any of the parties hereto without the written consent of 
the other party hereto, and 

                                     -54-
<PAGE>

no rights under this Assets Purchase Agreement may be transferred without the 
consent of the non-transferring party, except that:

                              (a)  the rights of ActaMed under this Assets 
Purchase Agreement may be transferred to any Person that acquires all or 
substantially all of the business or assets of ActaMed related to the ActaLab 
Software and the Network (whether by purchase of assets, merger or other 
corporate reorganization), [*];

                              (b)  the rights of SBCL under this Assets 
Purchase Agreement may be transferred before or after the last Transfer Date 
in connection with a transfer of shares of Series D Preferred Stock made in 
accordance with the provisions of the Stockholders' Agreement; and

                              (c)  all the rights of SBCL may be transferred 
to an Affiliate of SBCL or an acquiror of substantially all of its assets 
(whether by purchase of assets, merger or other corporate reorganization).

Any attempted assignment without such consent shall be void.  If the parties 
cannot agree upon whether a company competes with SBCL, the parties shall 
resolve the dispute pursuant to Article IX. Any assignment with consent does 
not release the assigning party from any of its obligations under this Assets 
Purchase Agreement unless the consent so states.  Any transferee of SBCL 
permitted pursuant to clause (b) above shall execute and deliver to ActaMed 
an instrument satisfactory to it agreeing to be bound by the provisions 
hereof and of the Stockholders' Agreement and the Registration Rights 
Agreement.

                    11.1.5  BINDING EFFECT.  Subject to the limitations on 
transfer set forth in Section 11.1.4, this Assets Purchase Agreement shall be 
binding upon and inure to the benefit of the parties hereto and their 
respective heirs, legal representatives, executors, administrators, 
successors and assigns.

                    11.1.6  KNOWLEDGE.  The use of the terms "to ActaMed's 
knowledge" or words of similar import shall refer to the facts known to [*] 
Michael K. Hoover and [*] after reasonable inquiry.  The use of the 
terms "to SBCL's knowledge" or words of similar import shall refer to the 
facts known to [*] after reasonable inquiry.

                    11.1.7  HEADINGS.  The section and other headings in this 
Assets Purchase Agreement are inserted solely as a matter of convenience and 
for reference, and are not a part of this Assets Purchase Agreement.

                    11.1.8  ENTIRE AGREEMENT.  This Assets Purchase Agreement 
and the Exhibits, Schedules, certificates and other documents delivered 
pursuant hereto or incorporated 

[*] CONFIDENTIAL TREATMENT REQUESTED


                                     -55-
<PAGE>

herein by reference, contain and constitute the entire agreement among the 
parties hereto and supersede and cancel any prior agreements, 
representations, warranties, or communications, whether oral or written, 
among the parties hereto relating to the transactions contemplated hereby or 
the subject matter herein.  This Assets Purchase Agreement may be changed, 
waived, discharged or terminated only by an agreement in writing signed by 
(a) ActaMed and (b) SBCL or, after the last of the Transfer Dates, the 
holder(s) of a majority of the Shares of Series D Preferred Stock and any 
Conversion Shares considered as a single class.

                    11.1.9  GOVERNING LAW.  Except for the matters referred 
to by Section 9.3, this Assets Purchase Agreement shall be governed by and 
construed in accordance with the laws of the State of Georgia.

                    11.1.10  COUNTERPARTS.  This Assets Purchase Agreement 
may be executed in one or more counterparts, each of which shall be deemed an 
original, but all of which together shall constitute one and the same 
instrument.

                    11.1.11  PRONOUNS.  All pronouns used herein shall be 
deemed to refer to the masculine, feminine or neutral gender as the context 
requires.

                    11.1.12  TIME OF ESSENCE.  Time is of the essence in this 
Assets Purchase Agreement.

                    11.1.13  SCHEDULES AND EXHIBITS.  All Schedules and 
Exhibits attached to this Assets Purchase Agreement are by this reference 
made a part hereof.




                          [SPACE INTENTIONALLY LEFT BLANK]





                                     -56-
<PAGE>

IN WITNESS WHEREOF, the parties hereto have executed this Assets Purchase 
Agreement under seal as of the day and year first above written.


                                       ActaMed Corporation


                                       /s/
                                       -----------------------------------
                                       By:  Michael K. Hoover
                                       Its: President



                                       SmithKline Beecham Clinical 
                                        Laboratories, Inc. 


                                       /s/  
                                       -----------------------------------
                                       By:  John B. Okkerse Jr.
                                       Its: President

                                     -57-
<PAGE>

                                      EXHIBIT A

                                     DEFINITIONS

          "AAA" means the American Arbitration Association.

          "ActaLab Software" means the ActaLab Software, as defined under the 
License Agreement.

          "ActaMed" means ActaMed Corporation, a Georgia corporation.

          "ActaMed Business" means the business of developing and selling 
information systems and related technology for the healthcare industry.

          "ActaMed Common Stock" means the $.01 par value common stock of 
ActaMed.

          "ActaMed Documents" has the meaning given in Section 3.2.1 of the 
Assets Purchase Agreement.

          "ActaMed Financial Statements" has the meaning given in Section 
3.2.3(a) of the Assets Purchase Agreement.

          "ActaMed Indemnitee" means ActaMed and its directors, officers, 
employees,  affiliates and permitted assigns.

          "ActaMed Network" means the EDI system and network operated by 
ActaMed for electronic laboratory test order entry and/or results reporting, 
which includes the Network Software and ActaMed's gateway and hardware and 
computer systems needed to operate that software.

          "ActaMed President" means the President of ActaMed, presently 
Michael Hoover, or should ActaMed be restructured in any manner, the officer 
of ActaMed having top authority over ActaMed's operations.

          "ActaMed Site" means a Provider [*] utilizing the Network for 
Lab EDI Services that was an SBCL Site on the Transfer Date of the Region in 
which such Provider [*] is located.

          "ActaMed Unaudited Statements" has the meaning given in Section 
3.2.3(a) of the Assets Purchase Agreement.

          "Affiliate" means, with respect to any Person, any other Person 
controlling, controlled by or under common control with such Person.

[*] CONFIDENTIAL TREATMENT REQUESTED


                                      A-1
<PAGE>

          "Applicable Transfer Date" means, with respect to an SBCL Site, the 
Transfer Date of the Region in which the SBCL Site is located.

          "Articles" means the Fourth Amended and Restated Articles of 
Incorporation of ActaMed, as the same may be hereafter amended from time to 
time.

          "Assumption Agreement" the agreement attached as EXHIBIT 2.6.2 to 
the Assets Purchase Agreement.

          "Automated Provider" means a Provider [*] who or which, on  the 
Transfer Date of the Region in which the Provider [*] is located, uses the 
SCAN Network to send clinical laboratory test orders to an SBCL Lab or to 
receive test result reports from an SBCL Lab.

          "Claim" means any claim for indemnification under Article VIII of 
the Assets Purchase Agreement, including but not limited to a General Claim, 
a Tax Claim or an Ownership Claim.

          "Claims Notice" means a written notice of an indemnification claim 
delivered pursuant to Section 8.2.3 of the Assets Purchase Agreement.

          "Code" means the Internal Revenue Code of 1986, as amended.

          "Communication Plan" shall have the meaning assigned in Section 
4.3.4.

          "Contract" means any written contract, agreement, lease, plan, 
instrument or other document, commitment, arrangement, undertaking, practice 
or authorization that is or may be binding on any Person or its property 
under applicable law.

          "Conversion Shares" means the shares of ActaMed Common Stock issued 
or issuable upon the conversion of, unless specified otherwise, all of the 
Preferred Shares.

          "Court Order" means any judgment, decree, writ, injunction, order 
or ruling of any federal, state or local court or governmental or regulatory 
body or authority that is binding on any Person or its property under 
applicable law.

          "Default" means (a) a breach of or default under any Contract or 
License, (b) the occurrence of an event that with the passage of time or the 
giving of notice or both would constitute a breach of or default under any 
Contract or License or (c) the occurrence of an event that with or without 
the passage of time or the giving of notice or both would give rise to a 
right of termination, renegotiation or acceleration under any Contract or 
License.

          "Development Agreement" means the Development Agreement between 
SBCL and ActaMed dated October 31, 1997 for the initial development of the 
ActaLab Software.

[*] CONFIDENTIAL TREATMENT REQUESTED

                                      A-2
<PAGE>

          "Dispute Notice" has the meaning given in Section 9.2.1 of the 
Assets Purchase Agreement.

          "Disputing Party" has the meaning given in Section 9.2 of the 
Assets Purchase Agreement.

          "EDI" means electronic data interchange.

          "Employee Benefit Plan" means any pension, retirement 
profit-sharing, deferred compensation, bonus, incentive, performance, stock 
option, phantom stock, stock purchase, restricted stock, medical, 
hospitalization, vision, dental or other health, life, disability, severance, 
termination or other employee benefit plan, program, arrangement, agreement 
or policy, whether written or unwritten, to which ActaMed contributes or is 
obligated to contribute, is a party to or is otherwise bound, or with respect 
to which ActaMed may have any Liability.  

          "Employee Computer" shall have the meaning assigned in Section 
1.2.1 of this Assets Purchase Agreement.

          "ERISA" means the Employee Retirement Income Security Act of 1974,  
as amended.

          "ERISA Affiliate" means (i) a member of any "controlled group," as 
defined in Section 414(b) of the Code, of which ActaMed is a member, (ii) a 
trade or business, whether or not incorporated, under common control (within 
the meaning of Section 414(c) of the Code) with ActaMed, or (iii) a member of 
any affiliated service groups (within the meaning of Section 414(m) of the 
Code) of which ActaMed is a member.  

          "Exchange Act" means the Securities Exchange Act of 1934, as 
amended.

          "FASB 5" means Statement of Financing Accounting Standards No. 5 
issued by the Financial Accounting Standards Board in March 1975.

          "Fourth Amended Articles" means the Fourth Amended and Restated 
Articles of Incorporation of ActaMed.

          "GAAP" means generally accepted accounting principles.

          "General Claim" means any claim other than a Tax Claim, Ownership 
Claim or Undisclosed Liability Claim based upon, arising out of or otherwise 
in respect of  any inaccuracy in any representation or warranty or any breach 
of any covenant or agreement made or to be performed by a Party pursuant to 
this Assets Purchase Agreement.

          "HSR Act"  means Section 7A of the Clayton Act, as added by Title 
II of the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, 
and the Regulations promulgated thereunder.

                                      A-3
<PAGE>

          "Implementation Committee" has the meaning given in Section 4.2.2 
of the Assets Purchase Agreement.

          "Implementation Plan" has the meaning given in Section 4.2.1 of  
the Assets Purchase Agreement.

          "Indemnifying Party" means the Party obligated to provide 
indemnification pursuant to Sections 8.2.1 or 8.2.2 of the Assets Purchase 
Agreement.

          "Indemnitee" means a Party seeking indemnification under Sections 
8.2.1 or 8.2.2 of the Assets Purchase Agreement.

          "Integrity Agreement" shall have the meaning given in the Services 
Agreement.

          "Intellectual Property" means copyrights, trademarks, service 
marks, trade names, patents, applications therefor, technology rights and 
licenses, computer software (including, without limitation, any source or 
object codes therefor or documentation relating thereto), computer software 
licenses, trade secrets, franchises, know-how, inventions and intellectual 
property rights.

          "Lab EDI Services" means electronic connectivity services enabling 
an Automated Provider to send Transmittal Information electronically to an 
SBCL Lab and/or to receive electronically Transmittal Information from an 
SBCL Lab utilizing the Network.

          "Liability" means any direct or indirect liability, indebtedness, 
obligation, expense, claim, deficiency, guaranty or endorsement of or by any 
Person (other than endorsements of notes, bills and checks presented to banks 
for collection or deposit in the ordinary course of business) of any type, 
whether accrued, absolute, contingent, matured, unmatured or other.

          "License Agreement" means the License Agreement between SBCL and 
ActaMed dated the date of the Assets Purchase Agreement and described in the 
preamble to the Assets Purchase Agreement.

          "License" means any license, franchise, notice, permit, easement, 
right, authorization or filing.

          "Lien" means any mortgage, lien, security interest, pledge, 
encumbrance, restriction on transferability, defect of title, charge or claim 
of any nature whatsoever on any property or property interest.

          "Litigation" means any lawsuit, action, claim, arbitration, 
administrative or other proceeding, criminal prosecution or governmental 
investigation or inquiry involving or affecting a Party or its business, 
assets or Contracts to which it is a party or by which it or its business, 
assets or Contracts may be bound or affected.

                                      A-4
<PAGE>

          "Losses" means any and all demands, claims, actions or causes of 
action, assessments, losses, diminution in value, damages (including special 
and consequential damages), liabilities, costs, and expenses, including 
without limitation, interest, penalties, cost of investigation and defense, 
and reasonable attorneys' and other professional fees and expenses.

          "Material Adverse Effect" means a material adverse effect on the 
business or financial condition of ActaMed or on the ability of ActaMed to 
conduct the ActaMed Business or the impairment of ActaMed's ability to 
perform its obligations under the ActaMed Documents.

          "Network" means the SCAN Network and/or the ActaMed Network.

          "Network Software" means ActaMed's personal computer version of the 
ProviderLink and ActaLink presentation and network software programs, under 
whatever name marketed, and the SBCL Software and the ActaLab Software, and 
all Changes to them, which are licensed to Automated Providers and which 
allow access to the Network for the transmission of laboratory test order 
entries and reception of test result information.

          "New Business Plan" means the New Business Plan for ActaMed 
prepared in accordance with Section 5.1.8 of this Assets Purchase Agreement.

          "OIG" shall have the meaning assigned in Section 4.4 of this Assets 
Purchase Agreement.

          "Ownership Claim" means any claim arising out of or otherwise in 
respect of any inaccuracy in the representations and warranties set forth in 
Sections 3.1.1, 3.1.2, 3.1.6 or 3.1.13, or 3.2.1, 3.2.2, 3.2.11, or 3.2.12 of 
the Assets Purchase Agreement.

          "Panel" has the meaning set forth in Section 9.2.1.

          "PC Systems" means the assets described in Section 1.1.1 of the 
Assets Purchase Agreement.

          "Performance Standards" has the meaning given such term in the 
Services Agreement.

          "Permitted Owner" means SBCL or a successor owner of SBCL's Series 
D Preferred Stock or Conversion Shares permitted under the Stockholders 
Agreement among ActaMed and its stockholders, as amended from time to time.

          "Person" means any individual, corporation, trust, estate, business 
trust, general or limited partnership, limited liability company, limited 
liability partnership, unincorporated association or other legal entity.

          "Phone Lines" means SBCL's contractual right to use certain phone 
lines, as more fully described in Section 1.1.2 of this Assets Purchase 
Agreement.

                                      A-5
<PAGE>

          "Preferred Stock" means the Series A Preferred Stock, the Series B 
Preferred Stock, the Series C Preferred Stock and the Series D Preferred 
Stock.

          [*] means an [*].

          "Projections" shall have the meaning assigned in Section 3.1.3 of 
this Assets Purchase Agreement.

          "Provider" means a physician, clinic, hospital, patient service 
center (other than [*]) or other provider of clinical health care services.

          "Provider Agreements" means the contracts described in Section 
1.1.3 of this Assets Purchase Agreement.

          "Public Offering" means a bona fide firm commitment underwritten 
offering of ActaMed Common Stock pursuant to a registration statement filed 
with and declared effective by the Securities and Exchange Commission 
pursuant to the Securities Act.

          "Region" means any one of Region One, Region Two, Region Three, or 
Region Four.

          "Region Four" means the Region described on SCHEDULE 2.2(d)

          "Region Four Sites" are the SCAN Sites located in Region Four.

          "Region Four Transfer Date" has the meaning given in Section 2.3.4 
of the Assets Purchase Agreement.

          "Region One" means the Region described on SCHEDULE 2.2(a)

          "Region One Sites" are the SCAN Sites located in Region One.

          "Region One Transfer Date" means December 31, 1997.

          "Region Three" means the Region described on SCHEDULE 2.2(c).

          "Region Three Sites" are the SCAN Sites located in Region Three.

          "Region Three Transfer Date" has the meaning given in Section 2.3.3 
of the Assets Purchase Agreement.

          "Region Two" means the Region described on SCHEDULE 2.2(b).

          "Region Two Sites" are the SCAN Sites located in Region Two.

[*] CONFIDENTIAL TREATMENT REQUESTED


                                      A-6
<PAGE>

          "Region Two Transfer Date" has the meaning given in Section 2.3.2 
of the Assets Purchase Agreement.

          "Registration Rights Agreement" means the Registration Rights 
Agreement dated May 3, 1994, as amended as of the date hereof and as the same 
may be amended from time to time, by and among ActaMed and the stockholders 
of ActaMed signatory thereto.

          "Regulation" means any statute, law, ordinance, regulation, 
requirement, order or rule of any federal, state, or local government or 
other governmental agency or body or of any other type of regulatory body, or 
any governmental or administrative interpretation of any thereof, including, 
without limitation, (i) those covering health, safety, environmental, energy, 
transportation, bribery, record keeping, zoning, antidiscrimination, 
antitrust, wage and hour, and price and wage control matters, (ii) 
requirements imposed by any governmental or regulatory body which must be 
satisfied to qualify for Medicare reimbursements, and (iii) any and all 
federal, state and local health care laws relating to or covering the methods 
and ways in which Lab EDI Services and other related or incidental services 
or benefits, if any, are provided to the Automated Providers, including, but 
not limited to, 42 U.S.C. Section 1395nn and the Clinical Laboratory 
Improvements Act of 1988, as amended.

          "Relationship Manager" has the meaning given in Section 4.2.2 of 
the Assets Purchase Agreement.

          "Required Consents" means any and all licenses, waivers, consents 
or approvals from other parties to Contracts necessary to consummate the 
transactions contemplated hereby and by any Exhibit hereto.

          "SBCL" means SmithKline Beecham Clinical Laboratories, Inc., a 
Delaware corporation.

          "SBCL Documents"  has the meaning given in Section 3.1.1 of the 
Assets Purchase Agreement.

          "SBCL Lab" means any location at which SBCL or its Affiliates 
provide, or may in the future provide, clinical laboratory testing services, 
regardless of the computer systems or software, if any, used by such lab for 
lab order entry and results reporting.

          "SBCL President" shall mean the President of SBCL, presently John 
B. Okkerse, Jr., Ph.D., or should SBCL be restructured in any manner, the 
officer of SBCL having top authority over SBCL's operations.

          "SBCL Site" means an Automated Provider utilizing the SCAN Network 
for Lab EDI Services on the Transfer Date of the Region in which such 
Automated Provider is located.

          "SBCL Software" means SBCL Software, as defined in the License 
Agreement.

                                      A-7
<PAGE>

          "SCAN Assets" means the assets described in subsections 1.1.1 
through 1.1.6 of the Assets Purchase Agreement.

          "SCAN Network" means the SBCL Software and SBCL's hardware and 
computer systems needed to operate the SBCL Software which enables Automated 
Providers to place laboratory test orders electronically to an SBCL Lab 
and/or to receive test result reports electronically from an SBCL Lab.

          "SCAN Site" means either an SBCL Site or an ActaMed Site.

          "SCAN Software" means the SBCL SCAN-TM- software licensed to 
ActaMed pursuant to the License Agreement.

          "Schedule" means any of the lists or disclosure schedules referred 
to herein.

          "SEC" means the Securities and Exchange Commission.

          "Securities Act" means the Securities Act of 1933, as amended.

          "Series A Preferred Stock" means the Series A Convertible Preferred 
Stock of ActaMed.

          "Series B Preferred Stock" means the Series B Convertible Preferred 
Stock of ActaMed.

          "Series C Preferred Stock" means the Series C Convertible Preferred 
Stock of ActaMed.

          "Series D Preferred Stock" means the Series D Convertible Preferred 
Stock of ActaMed.

          "Services Agreement" means the Services Agreement, made and entered 
into as of the date hereof, between ActaMed and SBCL.

          "Standstill Agreement" means the Standstill Agreement, dated the 
date hereof between SBCL and ActaMed.

          "Stockholders Agreement" means the Stockholders Agreement, dated as 
of May 3, 1994, as amended as of the date hereof and as the same may be 
amended from time to time, between ActaMed and the stockholders of ActaMed 
who are signatories thereto.

          "Stock Option Plans" means ActaMed's 1997 Stock Option Plan, 1996 
Directors Stock Option Plan, 1995 Stock Option Plan, 1994 Stock Option Plan, 
1993 Stock Option Plan and 1992 Stock Option Plan.

                                      A-8
<PAGE>

          "Subsidiary" means a corporation, limited liability company, 
partnership, association, trust, joint venture or other entity in which 
ActaMed or SBCL, as the case may be, has, directly or indirectly, an equity, 
ownership or proprietary interest of greater than ten percent (10%).

          "Substantial Holder" means an officer or employee of ActaMed who is 
the beneficial owner of one percent (1%) or more of the outstanding voting 
power or the outstanding equity (on a fully diluted basis) of ActaMed.

          "Tax Claim" means any claim based upon, arising out of or otherwise 
in respect of any inaccuracy in any representation or warranty or breach of 
any covenant or agreement made or to be performed by a Party pursuant to this 
Assets Purchase Agreement related to any Taxes.

          "Taxes" means any federal, state, county, local and other taxes, 
including without limitation, income taxes, estimated taxes, excise taxes, 
sales taxes, use taxes, gross receipts taxes, franchise taxes, taxes on 
earnings and profits, employment and payroll related taxes, property taxes, 
real property transfer taxes, Federal Insurance Contributions Act taxes, 
taxes on value added and import duties, whether or not measured in whole or 
in part by net income, imposed by the United States or any political 
subdivision thereof or by any Jurisdiction other than the United States or 
any political subdivision thereof.

          "Third Party Claim" means any claim, suit or proceeding (including, 
without limitation, a binding arbitration or an audit by any taxing 
authority) that is instituted against an Indemnitee by a Person other than an 
Indemnitor and which, if prosecuted successful, would result in a Loss for 
which such Indemnitee is entitled to indemnification hereunder.

          "Third Party Software" means software that SBCL licensed from third 
parties for use in delivery of Lab EDI Services, including without limitation 
software known as pkZip and pkUnzip, ProCom, and Reach Out.

          "Trade Secrets" means information related to a Party (1) which 
derives economic value, actual or potential, from not being generally known 
to or readily ascertainable by other Persons who can obtain economic value 
from its disclosure or use, and (2) which is the subject of efforts by said 
Person that are reasonable under the circumstances to maintain its secrecy.  
Without limitation, for ActaMed, ProviderLink and the ActaLab Software are 
Trade Secrets, and for SBCL, the SBCL Software is a Trade Secret.

          "Transaction Documents" means the Assets Purchase Agreement, the 
Development Agreement, the License Agreement, the Services Agreement and all 
documents executed or delivered in connection with the foregoing.

          "Transfer Benchmarks" means the criteria set forth on EXHIBIT 
2.3.1, timely achievement of which shall determine whether the SCAN Assets 
relating to SCAN Sites in the 

                                      A-9
<PAGE>

next Region to be transferred shall be transferred by SBCL to ActaMed 
pursuant to the Assets Purchase Agreement.

          "Transferred Employees" means the employees listed on SCHEDULE VI 
hereto.

          "Transfer Date" shall mean any one of and "Transfer Dates" shall 
mean more than one of the Region One Transfer Date, the Region Two Transfer 
Date, the Region Three Transfer Date, and the Region Four Transfer Date.

          "Transmittal Information" means information which an Automated 
Provider gives ActaMed for communication to SBCL over the Network, or which 
SBCL gives ActaMed for communication to an Automated Provider over the 
Network, including all copies of same, and including without limitation, data 
relating to laboratory records, clinical data, encounter data, test 
information, test codes and provider identification numbers (other than UPINs)

          "Undisclosed Liability Claim" means any claim arising out of or 
otherwise in respect of any inaccuracy in the representations and warranties 
set forth in Sections 3.2.3 or 3.2.8 of the Assets Purchase Agreement.

          "Vendor Contracts" means the Contracts described in Section 1.1.4 
of the Assets Purchase Agreement.

          "Warrant" means the Warrant to purchase 450,450 shares of ActaMed 
Common Stock at an exercise price of $5.00 issued by ActaMed to International 
Business Machines Corporation in December 1996.




                                      A-10

<PAGE>

                                    Exhibit 2.3.1

                                 TRANSFER BENCHMARKS

CLIENT SATISFACTION MEASUREMENTS

     ActaMed will provide such level of satisfactory Agreed Services (as 
defined in the Services Agreement) measured as set forth below.  The 
following "Transfer Benchmarks" will be used as the measurement for 
proceeding to the transfer of Region Two Sites, Region Three Sites and Region 
Four Sites.

REQUISITION VOLUME

     The first Transfer Benchmark shall be sustaining the monthly average 
number of Requisitions on a per-Site basis.  More specifically, ActaMed shall 
measure each month the volume of Requisitions for the ActaMed Sites in each 
Transferred Region.  It shall then calculate the average monthly per-Site 
Requisition volume.  This calculated average shall then be compared (i) to 
the mean of the average monthly per-Site Requisition volumes for the same 
Region for the twelve months immediately preceding the month for which the 
measurement was made and (ii) to the mean of the average monthly per-Site 
Requisition volumes for all non-Transferred Regions during the same time 
period.  If ActaMed's average monthly per-Site Requisition volume for the 
measured period, as adjusted for seasonality, is within 90% of each of (i) 
and (ii), above, then ActaMed will have met this benchmark.

     For Region One, SBCL shall provide within thirty (30) days after the 
Region One Transfer Date the monthly Requisitions and Sites for 
January-December 1997. For all other Regions, the monthly Requisitions and 
Sites for the twelve months prior to the Applicable Transfer Date shall be 
provided on the Applicable Transfer Date.

CUSTOMER SURVEYS

     The second Transfer Benchmark shall be sustaining levels of support and 
client acceptance satisfactory to SBCL, in its reasonable discretion, 
determined by comparing Transfer Surveys of the Automated Providers in each 
Transferred Region to a corresponding Initial Survey for such Automated 
Providers.

     The Initial Survey shall be a survey, in a format and with content 
approved by SBCL in advance, which shall be performed by ActaMed within 
thirty (30) days after each Transfer Date.  Such survey shall solicity 
performance and service-related comments from the Automated Providers about 
SBCL's provision of Lab EDI Services for that Region.  The initial survey 
shall be sent to ten percent (10%) of the Sites in each Region, selected at 
random by ActaMed.

     The Transfer Surveys for each Region shall be identical to the Initial 
Survey for such Region and shall be sent to the same Automated Providers, to 
the greatest extent possible, as the Initial

<PAGE>

Survey (and to replacement Automated Providers where not possible).  The 
Transfer Surveys shall solicit performance and service-related comments from 
the Automated Providers about ActaMed's provision of Lab EDI Services for 
each Region.  The Transfer Surveys shall be performed for each applicable 
Region within thirty (30) days prior to the each scheduled Transfer Date; 
provided, that a Transfer Survey for a given Region shall only solicit 
information pertaining to the period between the last Transfer Date and the 
next scheduled Transfer Date.

CUSTOMER COMPLAINTS

     The third and final Transfer Benchmark will be the absence of a material 
number (materiality to be determined by SBCL in its reasonable discretion 
relative to the frequency and severity of complaints) of documented problems 
and Automated Providers ceasing to do business with SBCL Labs citing issues 
related to Lab EDI Services provided by ActaMed.  SBCL will provide ActaMed 
with copies of any such documented problems within fifteen (15) days of their 
receipt.

                                       -2-

<PAGE>


                                    Exhibit 2.5.1

                             BILL OF SALE AND ASSIGNMENT

     This is a Bill of Sale and Assignment from SmithKline Beecham Clinical 
Laboratories, Inc., a Delaware corporation ("SBCL"), to ActaMed Corporation, 
a Georgia corporation ("ActaMed"), pursuant to a certain Assets Purchase 
Agreement dated as of December ___, 1997 between SBCL and ActaMed (the 
"Assets Purchase Agreement").  Capitalized terms used and not defined herein 
shall have the meanings set forth in the Assets Purchase Agreement.

     1.   For good and valuable consideration, the receipt and sufficiency of 
which are hereby acknowledged, SBCL hereby sells, assigns, transfers, conveys 
and delivers to ActaMed, its successors and assigns, to have and to hold 
forever:

          (a)  all of its right, title and interest in and to the SCAN Assets 
located at SCAN Sites in Region ___, listed on Exhibit A attached hereto, 
free and clear of all mortgages, liens, pledges, security interests, charges, 
claims and other encumbrances of any nature whatsoever other than those 
disclosed in the Assets Purchase Agreement or any Schedule thereto; and

          (b)  all of its rights in the single-copy licenses granting the 
right to use the Third Party Software (i) installed by, or in accordance with 
the instructions of, SBCL and (ii) resident on a PC System conveyed to 
ActaMed in accordance with the preceding subparagraph (a), which rights are 
in accordance with the provisions of Section 1.2.1 of the Assets Purchase 
Agreement; and

          (c)  all of its rights in the single-site licenses for Microsoft 
Windows to the extent contemplated by Section 1.2.2 of the Assets Purchase 
Agreement.

The assets described in the foregoing subparagraphs (a) -- (c) are 
hereinafter referred to as the "Transferred Assets."

     2.   From and after the Region ___ Transfer Date, upon request of 
ActaMed, SBCL shall duly execute, acknowledge and deliver all such further 
assignments, documents of transfer or conveyance, powers of attorney and 
assurances and do such further acts as may be reasonably required to convey 
to and vest in ActaMed and protect its rights, title and interest in 
enjoyment of all the Transferred Assets and as may be appropriate otherwise 
to carry out the transactions contemplated by the Assets Purchase Agreement 
and this Bill of Sale and Assignment.

     3.   In the event of a conflict between the terms and conditions of this 
Bill of Sale and Assignment and the terms and conditions of the Assets 
Purchase Agreement, the terms of the Assets Purchase Agreement shall govern, 
supersede and prevail.

     4.   Notwithstanding anything herein to the contrary, the terms and 
conditions of the Assets Purchase Agreement shall survive the execution and 
delivery of this Bill of Sale and Assignment.

<PAGE>


     5.   This instrument shall be governed by and construed in accordance 
with the laws of the State of Georgia.

     6.   This instrument shall be binding upon and shall inure to the 
benefit of the parties hereto and their respective successors and assigns.

     IN WITNESS WHEREOF, and intending to be legally bound, the undersigned 
have duly executed and delivered this Bill of Sale and Assignment as of this 
___ day of _______________, 199_.

                                   SMITHKLINE BEECHAM CLINICAL
                                   LABORATORIES, INC.


                                   By:_____________________________________
                                   Title:



Acknowledged and agreed:

ACTAMED CORPORATION


By: _____________________________
Title: 

                                       -2-

<PAGE>

                                    Exhibit 2.5.2

                    SMITHKLINE BEECHAM CLINICAL LABORATORIES, INC.

                                COMPLIANCE CERTIFICATE


     The undersigned certifies that he is a __________________________ of 
SmithKline Beecham Clinical Laboratories, Inc., a Delaware corporation 
("SBCL"), and that as such he is authorized to execute this certificate by 
and on behalf of the SBCL and, pursuant to Section 2.5.2 of the Assets 
Purchase Agreement, dated as of December __, 1997 (the "Asset Purchase 
Agreement"), between SBCL and ActaMed Corporation, a Georgia corporation 
("ActaMed"), and further certifies that:

          a.   The representations and warranties of SBCL, [other than the
representations and warranties contained in Sections 3.1.3, 3.1.4(a) - (e),
3.1.6(d) and 3.1.7(b),] contained in the Assets Purchase Agreement, as
supplemented by the Disclosure Schedule attached hereto, are true and correct
in all material respects at and as of the date hereof as though such
representation and warranties were made at and as of the date hereof.

          b.   SBCL has duly performed and complied with each covenant and 
condition required by the Assets Purchase Agreement to be performed or 
complied with before or on the date hereof.

     IN WITNESS WHEREOF, I have hereunto set my hand as of this ___ day of 
____________, 199_.

                                   By: ____________________________________
                                   Name:
                                   Title:



**   Bracketed text to be included on Region Two Transfer Date, Region Three
     Transfer Date, and Region Four Transfer Date only.

<PAGE>

                                    Exhibit 2.5.3

                    SMITHKLINE BEECHAM CLINICAL LABORATORIES, INC.

                        CERTIFICATE OF THE ASSISTANT SECRETARY

     The undersigned certifies that he is the Secretary of SmithKline Beecham 
Clinical Laboratories, Inc., a Delaware corporation (the "Company"), and that 
as such he is authorized to execute and deliver this certificate by and on 
behalf of the Company, and further certifies that:

          a.   Attached hereto as Exhibit "A" is a true, correct and complete 
copy of the Company's Certificate of Incorporation, as certified by the 
Secretary of State of the State of Delaware; said Certificate of 
Incorporation is in full force and effect as of the date hereof; since the 
date of certification by the Secretary of State of the State of Delaware 
there have been no amendments, alterations or modifications of such 
Certificate of Incorporation; and no action has been taken by the Company in 
contemplation of any such amendment or the dissolution, merger or 
consolidation of the Company.

          b.   Attached hereto as Exhibit "B" is a true, correct and complete 
copy of the Bylaws of the Company as in effect on the date hereof, and there 
have been no additional amendments authorized with respect thereto.

          c.   Attached hereto as Exhibit "C" is a copy of the resolutions 
duly adopted by the Board of Directors of the Company on December 29, 1997, 
with respect to the Asset Purchase Agreement and the transactions 
contemplated hereby, and such resolutions have not been rescinded or amended 
in any respect and are in full force and effect on the date hereof.

          d.   Each of the following persons now is, and at all times 
including and since ___________________, 199_, has been a duly elected 
officer or employee of the Company, holding the office or position in the 
Company set forth opposite his name below, and the signature of each such 
person appearing opposite his name below is his genuine signature:

               [Name and title]     _______________________________________

               [Name and title]     _______________________________________


     IN WITNESS WHEREOF, I have hereunto set my hand this ___ day of
____________, 199_.


                                   By: _________________________________
                                       Assistant Secretary

<PAGE>


     I, __________________________, ________________________ of SmithKline 
Beecham Clinical Laboratories, Inc., a Delaware corporation, do hereby 
certify that ____________________ is the duly elected Assistant Secretary of 
the Company, and that the signature appearing above is his genuine signature.

     IN WITNESS WHEREOF, I have herewith set my hand this ___ day of 
_____________, 199_.




                                   __________________________________________
                                   [Title]


                                       -2-

<PAGE>


                                    Exhibit 2.6.2

                                 ASSUMPTION AGREEMENT

     This is an Assumption Agreement by ActaMed Corporation, a Georgia 
Corporation ("ActaMed"), in favor of SmithKline Beecham Clinical 
Laboratories, Inc., a Delaware corporation ("SBCL"), pursuant to and in 
accordance with Section 2.6.2 of the Assets Purchase Agreement, dated as of 
December ___, 199_ (the "Assets Purchase Agreement") between SBCL and 
ActaMed.  Capitalized terms used and not defined herein shall have the 
meanings set forth in the Assets Purchase Agreement.

     1.   For good and valuable consideration, the receipt and sufficiency of 
which are hereby acknowledged, and intending to be legally bound, ActaMed 
hereby assumes:

          (a)  all of SBCL's contractual liabilities arising on or after the 
date hereof with respect to the Phone Lines installed at SCAN Sites in Region 
___;

          (b)  all of SBCL's duties and obligations arising on or after the 
date hereof under such Provider Agreements as relate to Automated Providers 
located in Region ___; and

          (c)  all of SBCL's duties and obligations arising on or after the 
date hereof pursuant to the Vendor Contracts relating to the provision of 
products or services in connection with SBCL's provision of Lab EDI Services 
in Region ________.

ActaMed undertakes to perform the liabilities set forth in the preceding 
subparagraphs (the "Liabilities") in accordance with their respective terms, 
effective as of the date hereof.

     2.   From and after the Region ___ Transfer Date, ActaMed will, from 
time to time, at the reasonable request of SBCL, duly execute, acknowledge 
and deliver all such additional instruments, notices, releases, certificates, 
powers of attorney, assurances and other documents and do all such further 
acts as SBCL may reasonably require in order to effectively assume the 
Liabilities and as may be appropriate otherwise to carry out the transactions 
contemplated by the Assets Purchase Agreement and this Assumption Agreement.

     3.   In the event of any conflict between the terms and conditions of 
this Assumption Agreement and the terms of the Assets Purchase Agreement, the 
terms of the Assets Purchase Agreement shall govern, supersede and prevail.

     4.   If the assumption by ActaMed of any Liability is invalid or 
unenforceable in any jurisdiction, it shall be ineffective to the extent of 
such invalidity or unenforceability without invalidating or rendering 
unenforceable the assumption by Purchaser of the remaining Liabilities.

<PAGE>

     5.   Notwithstanding anything herein to the contrary, the terms and 
conditions of the Assets Purchase Agreement shall survive the execution and 
delivery of this Assumption of Liabilities.

     6.   This instrument shall be governed by and construed in accordance 
with the laws of the State of Georgia.

     7.   This instrument shall be binding upon and shall inure to the 
benefit of the parties hereto and their respective successors and assigns.

     IN WITNESS WHEREOF, the undersigned have caused this Assumption 
Agreement to be executed this ___ day of ________________, ______.


                                   ACTAMED CORPORATION


                                   By: _________________________________
                                   Name:  
                                   Title:  

Acknowledged and agreed:

SMITHKLINE BEECHAM CLINICAL
LABORATORIES, INC.


By: ____________________________
Name: 
Title: 

                                       -2-

<PAGE>


                                    Exhibit 2.6.3

                                 ACTAMED CORPORATION

                                COMPLIANCE CERTIFICATE


     The undersigned certifies that he or she is a 
_______________________________ of ActaMed Corporation, a Georgia corporation 
("ActaMed"), and that as such he or she is authorized to execute this 
certificate by and on behalf of ActaMed and, pursuant to Section 2.6.3 of the 
Assets Purchase Agreement, dated as of December ___, 1997 (the "Asset 
Purchase Agreement"), between SmithKline Beecham Clinical Laboratories, Inc. 
("SBCL") and ActaMed, and further certifies that:

          a.   The representations and warranties of ActaMed contained in the 
Assets Purchase Agreement, as supplemented by the Disclosure Schedule 
attached hereto are true and correct in all material respects at and as of 
the date hereof as though such representation and warranties were made at and 
as of the date hereof.

          b.   ActaMed has duly performed and complied with each covenant and 
condition required by the Assets Purchase Agreement to be performed or 
complied with before or on the date hereof.

     IN WITNESS WHEREOF, I have hereunto set my hand as of this ___ day of 
____________, 199_.

                                        By:  ______________________________
                                        Name:
                                        Title:

<PAGE>

                                    Exhibit 2.6.4

                                 ACTAMED CORPORATION

                             CERTIFICATE OF THE SECRETARY

     The undersigned certifies that he is the Secretary of ActaMed 
Corporation, a Georgia corporation (the "Company"), and that as such he is 
authorized to execute and deliver this certificate by and on behalf of the 
Company, and further certifies that:

          a.   Attached hereto as Exhibit "A" is a true, correct and complete 
copy of the Company's Articles of Incorporation, as certified by the 
Secretary of State of the State of Georgia; said Articles of Incorporation 
are in full force and effect as of the date hereof; since the date of 
certification by the Secretary of State of the State of Georgia there have 
been no amendments, alterations or modifications of such Articles of 
Incorporation; and no action has been taken by the Company in contemplation 
of any such amendment or the dissolution, merger or consolidation of the 
Company.

          b.   Attached hereto as Exhibit "B" is a true, correct and complete 
copy of the Bylaws of the Company as in effect on the date hereof, and there 
have been no additional amendments authorized with respect thereto.

          c.   Attached hereto as Exhibit "C" is a copy of the resolutions 
duly adopted by the Board of Directors of the Company on December __, 1997, 
with respect to the Assets Purchase Agreement and the transactions 
contemplated hereby, and such resolutions have not been rescinded or amended 
in any respect and are in full force and effect on the date hereof.

          d.   Each of the following persons now is, and at all times 
including and since ___________________, 199_, has been a duly elected 
officer or employee of the Company, holding the office or position in the 
Company set forth opposite his or her name below, and the signature of each 
such person appearing opposite his or her name below is his or her genuine 
signature:

               [Name and title]     _______________________________________

               [Name and title]     _______________________________________


     IN WITNESS WHEREOF, I have hereunto set my hand this ___ day of 
________________, 199_.

                                   By:  ________________________________
                                        Secretary

<PAGE>


     I, _________________________, _________________________ of ActaMed 
Corporation, a Georgia corporation, do hereby certify that _________________  
is the duly elected Secretary of the Company, and that the signature 
appearing above is his genuine signature.

     IN WITNESS WHEREOF, I have herewith set my hand this ___ day of 
_______________, 199_.

                                   _______________________________________
                                   [Title]

                                       -2-

<PAGE>

                                 ACTAMED CORPORATION

                             CERTIFICATE OF THE SECRETARY

     The undersigned certifies that he is the Secretary of ActaMed 
Corporation, a Georgia corporation (the "Company"), and that as such he is 
authorized to execute and deliver this certificate by and on behalf of the 
Company, and further certifies that:

          a.   Attached hereto as Exhibit "A" is a true, correct and complete 
copy of the Company's Articles of Incorporation, as certified by the 
Secretary of State of the State of Georgia; said Articles of Incorporation 
are in full force and effect as of the date hereof; since the date of 
certification by the Secretary of State of the State of Georgia there have 
been no amendments, alterations or modifications of such Articles of 
Incorporation; and no action has been taken by the Company in contemplation 
of any such amendment or the dissolution, merger or consolidation of the 
Company.

          b.   Attached hereto as Exhibit "B" is a true, correct and complete 
copy of the Bylaws of the Company as in effect on the date hereof, and there 
have been no additional amendments authorized with respect thereto.

          c.   Attached hereto as Exhibit "C" is a copy of the resolutions 
duly adopted by the Board of Directors of the Company on December 19, 1997, 
with respect to the Assets Purchase Agreement and the transactions 
contemplated hereby, and such resolutions have not been rescinded or amended 
in any respect and are in full force and effect on the date hereof.

          d.   Each of the following persons now is, and at all times 
including and since January 1, 1997, has been a duly elected officer or 
employee of the Company, holding the office or position in the Company set 
forth opposite his or her name below, and the signature of each such person 
appearing opposite his or her name below is his or her genuine signature:

Michael K. Hoover, President and CEO      /s/    
                                      _________________________________________


Nancy J. Ham, Sr. Vice President          /s/    
                                      _________________________________________


     IN WITNESS WHEREOF, I have hereunto set my hand this 31st day of 
December, 1997.

                                   By:    /s/    
                                      _________________________________________
                                      Lewis R. Belote
                                      Secretary

<PAGE>

     I, Nancy J. Ham, Senior Vice President of ActaMed Corporation, a Georgia 
corporation, do hereby certify that Lewis R. Belote is the duly elected 
Secretary of the Company, and that the signature appearing above is his 
genuine signature.

     IN WITNESS WHEREOF, I have herewith set my hand this 31st day of 
December, 1997.

                                           /s/    
                                   _________________________________________
                                   Nancy J. Ham
                                   Senior Vice President

                                       -2-

<PAGE>

                               AMENDMENT NO. 1 TO
                           ASSETS PURCHASE AGREEMENT


          This AMENDMENT NO. 1 TO ASSETS PURCHASE AGREEMENT ("Amendment No. 1")
is made and entered into this 18th day of May, 1998 by and between HEALTHEON
CORPORATION, a Delaware corporation ("Healtheon"), ACTAMED CORPORATION, a
Georgia corporation ("ActaMed") and SMITHKLINE BEECHAM CLINICAL LABORATORIES,
INC., a Delaware corporation ("SBCL").

          WHEREAS, ActaMed and SBCL entered into an Assets Purchase Agreement on
December 31, 1997 ("Purchase Agreement"); and

          WHEREAS, ActaMed has entered into that certain "Agreement and Plan of
Reorganization by and among Healtheon Corporation, MedNet Acquisition Corp. and
ActaMed Corporation dated as of February 24, 1998, (the "Healtheon Merger
Agreement"), and, in order to permit the closing of the Healtheon Merger
Agreement, the parties wish to amend the Purchase Agreement as set forth below.

          NOW THEREFORE, in consideration of the premises and the mutual
promises contained herein, the parties, intending to be legally bound, agree as
follows:

1.   DEFINITIONS.

     Capitalized terms used in this Amendment No.1 and not otherwise defined
herein have the meanings set forth in the Purchase Agreement.

2.   AMENDMENTS. 

     2.1    ACTAMED REFERENCES. Except as the context may require otherwise or
this Amendment specifies otherwise, the term "ActaMed" shall be deemed to refer
to Healtheon wherever it appears in the Purchase Agreement. 

     2.2    PURCHASE PRICE.  Sections 1.5.4. and 1.5.5 are each amended by
substituting the phrase "Common Stock of Healtheon" for the phrase "ActaMed's
Series D Preferred" and by substituting the term "Healtheon Stock Price" for the
term "Series D Price."

     2.3    HEALTHEON STOCK PRICE.  Section 1.6 is amended as follows:

            2.3.1  The caption shall be changed to "HEALTHEON STOCK PRICE" and
the term "Series D Price" in the lead-in clause shall be replaced with the term
"Healtheon Stock Price".

                                     -1-
<PAGE>

            2.3.2  Section 1.6.1 (a) is amended by inserting the phrase
"divided by the Exchange Ratio" after "[*]" and "[*]".

            2.3.3  Section 1.6.1 (c) is amended by inserting the phrase
"divided by the Exchange Ratio on the Region Three Transfer Date or the Region
Four Transfer Date, as applicable" after "[*]".

            2.3.4  Section 1.6.3 is replaced in its entirety as follows:

            "1.6.3  For purposes of Section 1.6, "Qualified Preferred
            Stock" shall mean shares of Healtheon's preferred stock issued
            in an arm's length transaction to one or more purchasers who
            are not ActaMed or Healtheon's stockholders as of the Merger
            Effective Date for an aggregate purchase price of not less
            than $7,000,000; and the "Per Share Issue Price" of such
            Qualified Preferred Stock shall be the consideration per
            equivalent share of Common Stock received by Healtheon for the
            Qualified Preferred Stock multiplied by the Exchange Ratio,
            adjusted backwards to the Merger Effective Date for any
            subdivision or combination of shares of Healtheon capital
            stock or similar change in Healtheon's capital structure
            (whether by stock split, stock dividend, merger, share
            exchange, consolidation or otherwise) since the Merger
            Effective Date."

     2.4    DELIVERIES AT EACH OF THE TRANSFER DATES.  Section 2.6 is replaced
in its entirety as follows:

            "SECTION 2.6.  DELIVERIES AT EACH OF THE TRANSFER
            DATES.  At each of the Transfer Dates, the following
            documents shall be executed and delivered to SBCL to
            the extent relating to the region transferred:

                           2.6.1.  by Healtheon, the applicable
            number of shares of Common Stock of Healtheon, as
            determined in accordance with Sections 1.5, 1.6 and 1.8
            of this Assets Purchase Agreement;

                           2.6.2.   by either Healtheon or ActaMed,
            an Assumption Agreement (in the form attached hereto as
            EXHIBIT 2.6.2) covering, for the Region transferred,
            (i) the Vendor Contracts for the Region transferred,
            (ii) the Phone Lines and (iii) the Provider Agreements
            for the Region transferred;

                           2.6.3    by Healtheon and ActaMed, a
            Compliance Certificate (in the form attached hereto as
            EXHIBIT 2.6.3), pursuant to which Healtheon and ActaMed
            will jointly and severally make the representations and
            warranties contained in Section 3.2 hereof, which
            certificate shall attach revised Disclosure Schedules
            to the 

[*] CONFIDENTIAL TREATMENT REQUESTED


                                     -2-
<PAGE>

            extent necessary to make the representations and warranties 
            made on such Transfer Date true and correct in all material 
            respects;

                           2.6.4    by Healtheon, a Secretary's Certificate 
            (in the form attached hereto as EXHIBIT 2.6.4); and

                           2.6.5    by either Healtheon or ActaMed, such 
            other documents or certificates as may be reasonably requested by 
            SBCL."

     2.5    REPRESENTATIONS AND WARRANTIES.

            2.5.1  INVESTMENT REPRESENTATIONS OF SBCL.  Section 3.1.12 is
amended by deleting the parentheticals referencing the "Conversion Shares" in
each of subsections (a) and (b), and by adding the words "or Common Stock of
Healtheon" after the term "Series D Preferred Stock" in each of subsections (a)
and (b).

            2.5.2  BY ACTAMED AND HEALTHEON.  The lead-in paragraph of Section
3.2 is replaced in its entirety as follows:

            "SECTION 3.2. BY ACTAMED AND HEALTHEON.  Except as set
            forth on a Disclosure Schedule hereto, for
            representations to be made on any Transfer Date after
            the Merger Effective Date, ActaMed and Healtheon hereby
            jointly and severally represent and warrant to SBCL,
            and will jointly and severally represent and warrant to
            SBCL on each such Transfer Date, as follows:"

Other than as specifically set forth in Sections 2.5.3 through 2.5.9 of this
Amendment No. 1, each of the representations and warranties set forth in
Sections 3.2.1 through 3.2.25 of the Purchase Agreement are amended as necessary
to the effect that such representations and warranties shall be made on any
Transfer Date after the Merger Effective Date by both ActaMed and Healtheon.

            2.5.3 FINANCIAL STATEMENTS.  Section 3.2.3 is amended as follows:

                    2.5.3.1  Subsection (a) is amended by adding the following
text at the end of such subsection:

            "DISCLOSURE SCHEDULE 3.2.3 hereto also contains a true
            and correct copy of (i) the balance sheets of Healtheon
            at December 31, 1996 and December 31, 1997 and the
            statements of operations, statements of stockholders
            equity and statements of cash flows of Healtheon for
            the years ended December 31, 1996 and December 31,
            1997, which have been audited by Ernst & Young,
            independent accountants (the "HEALTHEON FINANCIAL
            STATEMENTS"),  and (ii) the 

                                     -3-
<PAGE>

            unaudited balance sheets of Healtheon at March 31, 
            1998 and the statements of operations, statements of 
            stockholders equity and statements of cash flows of 
            Healtheon for quarter ended March 31, 1998 (the 
            "HEALTHEON UNAUDITED STATEMENTS")."

                    2.5.3.2  Subsection (b) is amended by adding the phrase "and
the Healtheon Financial Statements" after the term "ActaMed Financial
Statements" wherever such term appears in such subsection, by inserting the word
"respective" prior to the phrase "financial position", by inserting the phrase
"and Healtheon" after the term "ActaMed" wherever such term appears in such
subsection, and by replacing the introduction to the final sentence, "ActaMed
has" with the introduction "ActaMed and Healtheon have".

                    2.5.3.3  Subsection (c) is amended by adding the phrase "and
the Healtheon Unaudited Statements after the term "ActaMed Unaudited
Statements", by inserting the word "respective" prior to the term "chief
financial officer", by inserting the phrase "and Healtheon" after the phase
"chief financial officer of ActaMed" and by inserting the phrase "and Healtheon
and its Subsidiaries" after the phrase "ActaMed and its Subsidiaries".

            2.5.4   CONSENTS.  Section 3.2.4 is amended by inserting the words
"or Healtheon" after the word "ActaMed" in the third line thereof, by
substituting the term "Common Stock of Healtheon" for the term "Series D
Preferred Stock" in item (b), and by deleting the parenthetical in item (b) and
the remainder of the Section following such parenthetical.

            2.5.5   CAPITALIZATION.  Section 3.2.5 is amended by substituting
the term "Common Stock of Healtheon" for the term "Series D Preferred Stock"
throughout the Section. Section 3.2.5 shall be further amended by deleting the
phrase "will have the designations, preferences, limitations and relative rights
set forth in the Articles" from subsection (b) and by deleting the final
sentence of subsection (b).

            2.5.6   REGISTRATION RIGHTS.  Section 3.2.6 is amended by
substituting the term "Investors' Rights Agreement" for "Registration Rights
Agreement," and by adding the clause "except for such securities which may be
granted registration rights pursuant to the terms of the Investors' Rights
Agreement" at the end of such Section.

            2.5.7   OFFERING.  Section 3.2.7 is amended by substituting the term
"Common Stock of Healtheon" for "Series D Preferred Stock" and by deleting the
parenthetical.

            2.5.8   CHANGES.  Section 3.2.8 is amended by adding the subsection
designation "(a)" at the beginning of such Section and by adding a new
subsection (b) as follows:

            "Since the date of the latest Healtheon Unaudited
            Statements, there has not been (i) any adverse change
            in the assets, liabilities, financial condition or
            operations of Healtheon from that reflected in the
            Healtheon Financial Statements, other than changes in
            the ordinary course of business, none of which
            individually or in the 

                                     -4-
<PAGE>

            aggregate has had a Material Adverse Effect or (ii) 
            any adverse change in the prospects of the business 
            of Healtheon or any other event or condition (or 
            events or conditions) of any character which, 
            either individually or cumulatively, has had a 
            Material Adverse Effect."

            2.5.9   FULL DISCLOSURE.  Section 3.2.25 is amended by inserting the
words "and Common Stock of Healtheon" after the term "Series D Preferred Stock."

     2.6    AUDIT.  Section 4.1.2 is amended by replacing the term "ActaMed
Common Stock" with "Common Stock of Healtheon" and by deleting the clause "on or
prior to April 30, 1998" and replacing it with the clause "in an expedient
fashion as required."

     2.7    STANDSTILL. Section 4.3.5 is replaced in its entirety by the
following:

            "4.3.5.  STANDSTILL.  At all times prior to the last
            Transfer Date, neither Healtheon nor ActaMed shall
            consummate, or enter into any agreement with respect
            to, any merger, share exchange or consolidation or sale
            of substantially all of its assets, nor shall Healtheon
            dispose of the capital stock of ActaMed, without the
            prior written consent of SBCL."

     2.8    COVENANTS TO SBCL.  Article V is replaced in its entirety by the
following:

                                     "ARTICLE V
                                          
                                 COVENANTS TO SBCL

            SECTION 5.1  ADDITIONAL COVENANTS.  ActaMed and
            Healtheon, as applicable, covenant and agree as
            follows:

                    5.1.1  TRANSACTIONS WITH AFFILIATES. For so
            long as either (i) SBCL is a stockholder of Healtheon
            or any successor to this agreement or (ii) the Services
            Agreement (or any successor agreement for Lab EDI
            Services), including all extensions and renewals
            thereof, remains in effect, Healtheon shall not,
            directly or indirectly, knowingly enter into any
            material transaction or agreement with any of its
            Affiliates, or a material transaction or agreement in
            which an Affiliate of Healtheon has a direct or
            indirect interest, unless such transaction or agreement
            is on terms and conditions no less favorable to
            Healtheon or any of its Subsidiaries than could be
            obtained at the time in an arm's length transaction
            with a third Person that is not such an Affiliate, or
            unless such transaction or agreement has been reviewed
            and approved by either a majority of those members of
            Healtheon's 

                                     -5-
<PAGE>

            Board of Directors who have no such interest in the 
            transaction or a majority of the shareholders, 
            voting in good faith.  This Section is in 
            furtherance and not in limitation of Healtheon's 
            obligations under Section 144 of the Delaware 
            Corporation Law.

                    5.1.2  CORPORATE EXISTENCE, BUSINESS,
            MAINTENANCE, INSURANCE.  For so long as the Services
            Agreement (or any successor agreement for Lab EDI
            Services), including all extensions and renewals
            thereof, remains in effect:

                           (a)  Neither Healtheon nor ActaMed will
            enter into any agreement for the disposition of all or
            substantially all of the assets used in the provision
            of Lab EDI Services, including by way of a merger,
            consolidation, share exchange, or, in the case of
            Healtheon, sale of the capital stock of ActaMed, if
            such a sale will have a material impact on the
            provision of Lab EDI Services.

                           (b)  Healtheon, either independently or
            through ActaMed, shall continue to engage in the
            business of developing information networks (with a
            meaningful focus on the provision of lab order entry
            and results reporting services as one of Healtheon's
            core businesses) and businesses related thereto.

                           (c)  ActaMed and Healtheon will maintain
            or cause to be maintained in good repair, working order
            and condition all properties used in the business of
            Healtheon and any Subsidiary related to the provision
            of Lab EDI Services and from time to time will make or
            cause to be made all appropriate repairs, renewals and
            replacements thereof.  Healtheon and any such
            Subsidiary will at all times comply in all material
            respects with the provisions of all material leases to
            which it is a party or under which it occupies property
            related to the provision of Lab EDI Services so as to
            prevent any loss or forfeiture thereof or thereunder.

                           (d)  Healtheon will maintain or cause to
            be maintained, with financially sound and reputable
            insurers, insurance in amounts approved by Healtheon's
            Board of Directors with respect to its properties and
            business and the properties and business of any
            Subsidiary against loss or damage.

            SECTION 5.2.  INFORMATIONAL COVENANTS OF HEALTHEON. 
            Healtheon covenants and agrees that it shall deliver
            the following information to SBCL so long as the
            Services Agreement remains in effect (including any
            extensions or renewal thereof) or until such time as
            Healtheon shall have consummated a Public Offering.

                                     -6-
<PAGE>

                    5.2.1.  MANAGEMENT'S ANALYSIS.  All the
            financial statements delivered pursuant to the Investor
            Rights Agreement shall be accompanied by an informal
            narrative description of material business and
            financial trends and developments and significant
            transactions that have occurred in the appropriate
            period or periods covered thereby.

                    5.2.2.  BUDGETS.  As soon as practicable, but
            in any event within thirty (30) days prior to the
            commencement of a fiscal year, an annual operating
            budget for such fiscal year, approved by the Board of
            Directors, including monthly income and cash flow
            projections and projected balance sheets as of the end
            of each quarter within such fiscal year.  Extensions of
            such due date shall not be unreasonably withheld.

                    5.2.3.  INSPECTION.  Except as provided in
            Section 5.2.5, below, upon reasonable notice, and no
            more frequently than two (2) times per year, Healtheon
            shall, and shall cause its Subsidiaries to, permit SBCL
            by its representatives, agents or attorneys:

                           (a)  to examine all books of account,
            records, reports and other papers of Healtheon or such
            Subsidiary,

                           (b)  to make copies and take extracts
            from any thereof, 

                           (c)  to discuss the affairs, finances
            and accounts of Healtheon or such Subsidiary with
            Healtheon's or such Subsidiary's officers and
            independent certified public accountants (and by this
            provision Healtheon hereby authorizes said accountants
            to discuss with SBCL and its representatives, agents or
            attorneys the finances and accounts of Healtheon or
            such Subsidiary), and

                           (d)  to visit and inspect, at reasonable
            times and on reasonable notice during normal business
            hours, the properties of Healtheon and any Subsidiary.  

            Notwithstanding any provision herein to the contrary,
            the provisions of this Section 5.2.3 are in addition to
            any rights which SBCL may have as a Healtheon
            stockholder under the Delaware Corporation Law and
            shall in no way limit such rights.

            The expenses of SBCL in connection with any such
            inspection shall be for the account of SBCL. 
            Notwithstanding the foregoing 

                                     -7-
<PAGE>

            sentence, it is understood and agreed by Healtheon 
            that all reasonable expenses incurred by Healtheon 
            or such Subsidiary, any officers, employees or 
            agents thereof or the independent certified public 
            accountants therefor, shall be expenses payable by 
            Healtheon and shall not be expenses of SBCL.

                    5.2.4  OTHER INFORMATION  Except as provided in
            Section 5.2.5 below,  for so long as SBCL continues to
            own at least [*] of the aggregate number of shares of 
            Healtheon Common Stock now or hereafter acquired by it 
            as a direct result of the Region transfers completed under 
            this Agreement, Healtheon shall deliver courtesy copies of 
            the following information, as requested by and furnished to
            the SBCL-nominated board member, or, if there is no
            such SBCL-nominated board member, as requested by the
            President of SBCL, to up to three employees of, or in-house 
            counsel to, SBCL designated by SBCL in writing
            (and who initially shall be [*]):

                           (a)  promptly after the submission
            thereof to Healtheon, copies of any detailed reports
            (including the auditors' comment letter to management,
            if any such letter is prepared) submitted to Healtheon
            by its independent auditors in connection with each
            annual or interim audit of the accounts of Healtheon
            made by such accountants;

                           (b)  promptly, and in any event within
            ten (10) days after obtaining knowledge thereof, notice
            of the institution of any suit, action or proceeding
            (other than a proceeding of general application which
            is not directly against Healtheon or one or more of its
            Subsidiaries), the happening of any event or, to the
            best knowledge of Healtheon, the assertion or threat of
            any claim against Healtheon or any of its Subsidiaries
            which, either individually or in the aggregate, would
            have a Material Adverse Effect;

                           (c)  promptly upon, and in any event
            within thirty (30) days after, obtaining knowledge
            thereof, notice of any material breach of, Default
            under or failure to comply with any material term under
            this Article V of this Agreement or any change in
            Healtheon's relationship with its major customers,
            suppliers, employees or other entity with which
            Healtheon has a business relationship if such breach
            would have a Material Adverse Effect;

[*] CONFIDENTIAL TREATMENT REQUESTED


                                     -8-
<PAGE>

                           (d)  with reasonable promptness, a
            notice of any material default by Healtheon or any of
            its Subsidiaries under any  agreement to which it is a
            party if such breach would have a Material Adverse
            Effect;

                           (e)  with reasonable promptness, copies
            of all written materials furnished to directors;

                           (f)  promptly (but in any event within
            ten (10) days) after the filing of any document or
            material with the SEC, a copy of such document or
            material;

                           (g)  promptly after the record date set
            by the Board of Directors to determine the stockholders
            entitled to vote at Healtheon's annual meeting of
            stockholders (but in any event ten (10) days prior to
            such meeting), a list of all stockholders of Healtheon
            and their respective holdings; and

                           (h)  promptly upon request therefor,
            such other data, filings and information as the 
            SBCL-nominated Healtheon Board representative may from time
            to time reasonably request, or, if there is no such
            SBCL-nominated board member, as the President of SBCL
            may from time to time reasonably request, in either
            case to the extent consistent with Section 220 of the
            Delaware Corporation Law.

                    5.2.5  EXCLUDED INFORMATION.  Notwithstanding
            the provisions of Sections 5.2.3 and 5.2.4, SBCL shall
            not have the right to inspect, receive, review or
            otherwise have access to any information or documents
            which, in the reasonable opinion of Healtheon's counsel
            would constitute any of the following: (i) a waiver of
            the attorney-client privilege; (ii) the disclosure of
            any third-party confidential or proprietary
            information, disclosure of which is restricted by a
            written non-disclosure agreement or applicable law; or
            (iii) the disclosure of any confidential or proprietary
            information of Healtheon or any of its affiliated
            entities which relates to any areas of Healtheon's
            business, with which, in the reasonable  opinion of the
            Board of Directors of Healtheon, SBCL or its affiliates
            compete (collectively, the "Excluded Information").  

            Notwithstanding Section 5.2.4 above, in the event of a
            Change of Control of Healtheon by an Acquirer that has
            a class of securities registered under the Exchange Act
            (a "Public Company"), SBCL shall no longer have the
            information rights set forth in this Section 

                                     -9-
<PAGE>

            5.25.  In the event of a Change in Control of 
            Healtheon by an Acquirer (other than a Public 
            Company) that is a direct competitor of SBCL, SBCL 
            shall continue to have the information rights set 
            forth in Section 5.2.4, but only insofar as the 
            information to be obtained upon the exercise of 
            such rights relates to Lab EDI Services provided, 
            to be provided, or alleged by SBCL to have been 
            required to be provided, by ActaMed or Healtheon. 
            For purposes of this Section 5.2.5, a "Change of 
            Control" shall mean the sale or other transfer in a 
            single transaction or series of related 
            transactions to a person or group of affiliated 
            persons (the "Acquiror") of shares of Healtheon 
            Common Stock representing more than 50% of the 
            voting power of all Healtheon Common Stock then 
            outstanding.

            Notwithstanding the foregoing limitations of this
            Section 5.2.5, independent auditors retained by SBCL
            shall have the right to review any Excluded Information
            which, in their reasonable opinion, is necessary to
            determine or confirm (i) the amount of royalties
            payable to SBCL under the License Agreement by reason
            of connectivity between Providers and commercial
            laboratories other than SBCL Labs or (ii) the revenues
            of ActaMed for purposes of Section 1.6 hereof.

                    5.2.6  CONFIDENTIALITY OBLIGATIONS.  Subject to
            Section 4.4, all information disclosed to or obtained
            by SBCL pursuant to this Section 5.2 (including any
            Excluded Information which may be inadvertently
            disclosed to or obtained by SBCL hereunder) shall be
            deemed to be the confidential information of Healtheon
            and SBCL agrees that it shall treat such information
            with the same degree of care that it uses to protect
            its own confidential information of a similar nature
            and shall only disclose such information to those
            employees of SBCL who have a need to know such
            information in order to enforce SBCL's rights under
            this Agreement and the License Agreement.  In the event
            that SBCL obtains any copies of any Excluded
            Information, SBCL shall promptly return all copies of
            such information to Healtheon upon request or promptly
            after the SBCL employees in possession of Excluded
            Information gain actual knowledge that it is Excluded
            Information."

     2.9    SURVIVAL OF REPRESENTATIONS AND WARRANTIES.  Section 8.1.2 is
amended by deleting the word "ActaMed" from the caption, by replacing the word
"ActaMed" with the words "ActaMed or Healtheon" throughout the Section and by
replacing the term "Series D Preferred Stock" with the term "Common Stock of
Healtheon."

                                     -10-
<PAGE>

     2.10   INDEMNITY OF SBCL.  Section 8.2.1 is amended by adding the clause
"including, without limitation, Section 5.2.6 hereof" at the end of subsection
(a)(ii).

     2.11   INDEMNITY OF ACTAMED AND HEALTHEON.  Section 8.2.2 is amended by
(i) deleting the word "ActaMed" in the caption and replacing it with the words
"ActaMed and Healtheon", (ii) by replacing the words "ActaMed agrees" in the
lead-in paragraph with the words "ActaMed and Healtheon, jointly and severally
agree," (iii) by replacing the word "ActaMed" in subsections (a)(i), (ii) and
(iii) with the words "ActaMed or Healtheon", and (iv) by adding the clause
"including, without limitation, representations and warranties made by ActaMed
prior to the Merger Effective Date" at the end of subsection (a)(i).

     2.12   SPECIAL INDEMNITY AS TO PROJECTIONS.  Section 8.2.9 is amended by
inserting the clause "as such Lab EDI Services are presently provided, without
regard to any additional expenses incurred as a result of the acquisition of
ActaMed by Healtheon" after the parenthetical "(as defined in the Services
Agreement)".

     2.13   NOTICES.  Section 11.1.1 is amended by adding the following:

               "If to Healtheon:

                    Healtheon Corp.
                    4600 Patrick Henry Drive
                    Santa Clara, CA 95054
                    Attention:  General Counsel
                    Telephone:  (408) 876-5000
                    Telecopy:   (408) 876-5175"

     2.14   ASSIGNMENT.  Section 11.1.4(b) is amended by replacing the term
"Series D Preferred Stock" with the term "Common Stock of Healtheon" and by
replacing the term "Stockholders' Agreement" with the term "Affiliate Agreement
prior to a Public Offering."

     2.15   ENTIRE AGREEMENT.  Section 11.1.8 is amended by deleting the text
after the term "SBCL."

     2.16   ADDED DEFINITIONS.  The following definitions are added to Exhibit
A to the Purchase Agreement.  If such terms are defined in said Exhibit A, the
existing definitions shall be deleted in their entirety and the following shall
replace the existing definitions:

            "Affiliate Agreement" means the ActaMed Corporation
            Affiliate Agreement, dated as of May   , 1998, between
            Healtheon and SBCL.

            "Common Stock of Healtheon" means the common stock,
            $.0001 par value, of Healtheon.

                                     -11-
<PAGE>

            "Exchange Ratio" shall have the meaning given to such
            term in the Healtheon Merger Agreement.

            "Healtheon Merger Agreement" means the Agreement and
            Plan of Reorganization, dated February 24, 1998, by and
            among Healtheon Corporation, MedNet Acquisition Corp.
            and ActaMed Corporation.

            "Investors' Rights Agreement" means the Amended and
            Restated Investors' Rights Agreement, dated as of May
            __, 1998, between Healtheon and the persons and
            entities listed on Schedules A and B thereto.

            "Material Adverse Effect" means a material adverse
            effect on the business or financial condition of either
            Healtheon or ActaMed or on the ability of either
            Healtheon or ActaMed to conduct the ActaMed Business,
            including to provide Lab EDI Services, or the
            impairment of the ability of either Healtheon or
            ActaMed to perform its respective obligations under the
            ActaMed Documents.

            "Merger Effective Date" means the date on which the
            transactions contemplated by the Healtheon Merger
            Agreement become effective.

            "New Business Plan" means for the business plan of
            ActaMed presented to SBCL on April 29, 1998, approved
            by the ActaMed board of directors on May 5, 1998 and in
            the form approved by the Healtheon board of directors
            on May 14, 1998, covering (i) for the years 1998 and
            1999, projected financial data, including statements of
            operations, and operational data, including number of
            sites and transactions per site and (ii) for the year
            2000, number of sites.

            "Public Offering" means a bona fide firm commitment
            underwritten offering of the Common Stock of Healtheon
            or the ActaMed Common Stock, as the case may be,
            pursuant to a registration statement filed with and
            declared effective by the Securities and Exchange
            Commission pursuant to the Securities Act.

     2.17   DELETED DEFINITIONS.  The definitions for the following terms set
forth in Exhibit A to the Purchase Agreement are deleted in their entirety:

            "Conversion Shares"

            "Permitted Owner"

                                     -12-
<PAGE>

            "Preferred Stock" and "Series A Preferred Stock," "Series B
            Preferred Stock" and "Series C Preferred Stock" 

            "Stock Option Plans"

3.   MISCELLANEOUS.

     3.1    ENTIRE AGREEMENT.  This Amendment No.1 constitutes the entire
understanding between the parties with respect to amendment of the Purchase
Agreement and supersedes all proposals, communications and agreements between
the parties relating to such subject matter.  No amendment, change, or waiver of
any provision of this Amendment No.1 will be binding unless in writing and
signed by all parties.

     3.2    GOVERNING LAW.  This Amendment No.1 will be governed by and
construed in accordance with the laws of the State of Georgia applicable to
contracts made and performed therein.

     3.3    PURCHASE AGREEMENT PROVISIONS.  Except as otherwise provided, all
provisions of the Purchase Agreement not modified by this Amendment No. 1 shall
remain in full force and effect.

     3.4    COUNTERPARTS.  This Amendment No. 1 may be executed in one or more
counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument.



                             [INTENTIONALLY LEFT BLANK]




                                     -13-
<PAGE>

            IN WITNESS WHEREOF, the parties have executed this Amendment No. 1
to the Purchase Agreement as of the date set forth above.


                                     HEALTHEON CORPORATION

                                     By:  /s/ W. Michael Long
                                        -------------------------------------
                                     Its: CEO
                                         ------------------------------------

                                     ACTAMED CORPORATION

                                     By:  /s/ Michael K. Hoover
                                        -------------------------------------
                                     Its: President & CEO
                                         ------------------------------------

                                     SMITHKLINE BEECHAM CLINICAL
                                     LABORATORIES, INC. 

                                     By:  /s/ John B. Okkersee Jr.
                                        -------------------------------------
                                     Its: President
                                         ------------------------------------



                                     -14-



<PAGE>

                                                                      EXECUTION



                                          
                                 LICENSE AGREEMENT
                                          
                                      between 
                                          
                   SMITHKLINE BEECHAM CLINICAL LABORATORIES, INC.
                                          
                                        and 
                                          
                                ACTAMED CORPORATION




                                  December 31, 1997



<PAGE>

                                 TABLE OF CONTENTS

<TABLE>
<CAPTION>

                                                                           PAGE
                                                                           ----
<S>                                                                        <C>
ARTICLE 1 - DEFINITIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . 1

    1.1     ActaLab Software . . . . . . . . . . . . . . . . . . . . . . . . 1
    1.2     Affiliate. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
    1.3     Confidential Information . . . . . . . . . . . . . . . . . . . . 2
    1.4     Derivative Work. . . . . . . . . . . . . . . . . . . . . . . . . 2
    1.5     Documentation. . . . . . . . . . . . . . . . . . . . . . . . . . 2
    1.6     Exclusive Developments . . . . . . . . . . . . . . . . . . . . . 2
    1.7     Health Care Field. . . . . . . . . . . . . . . . . . . . . . . . 2
    1.8     Information Services . . . . . . . . . . . . . . . . . . . . . . 3
    1.9     Object Code. . . . . . . . . . . . . . . . . . . . . . . . . . . 3
    1.10    Other Lab. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
    1.11    ProviderLink . . . . . . . . . . . . . . . . . . . . . . . . . . 3
    1.12    [*]. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
    1.13    Providers. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
    1.14    Related Entity . . . . . . . . . . . . . . . . . . . . . . . . . 3
    1.15    SBCL Software. . . . . . . . . . . . . . . . . . . . . . . . . . 3
    1.16    SBCL Trademark . . . . . . . . . . . . . . . . . . . . . . . . . 3
    1.17    SCAN Agreements. . . . . . . . . . . . . . . . . . . . . . . . . 3
    1.18    SCAN Developments. . . . . . . . . . . . . . . . . . . . . . . . 4
    1.19    Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
    1.20    Source Code. . . . . . . . . . . . . . . . . . . . . . . . . . . 4
    1.21    Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 4
    1.22    Territory. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
    1.23    Third Party Software . . . . . . . . . . . . . . . . . . . . . . 4
    1.24    Trigger Date . . . . . . . . . . . . . . . . . . . . . . . . . . 4

ARTICLE 2 - LICENSE GRANTS; RELATED PROVISIONS . . . . . . . . . . . . . . . 4

    2.1     SCAN Development License . . . . . . . . . . . . . . . . . . . . 4
    2.2     ActaLab Development License. . . . . . . . . . . . . . . . . . . 5
    2.3     Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
    2.4     Technology Transfer. . . . . . . . . . . . . . . . . . . . . . . 6
    2.5     Royalties. . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

ARTICLE 3 - SCAN DEVELOPMENTS OWNERSHIP; RELATED PROVISIONS. . . . . . . . . 6

    3.1     Ownership. . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
    3.2     Limitations. . . . . . . . . . . . . . . . . . . . . . . . . . . 7

ARTICLE 4 - LICENSE BACK . . . . . . . . . . . . . . . . . . . . . . . . . . 8

    4.1     License Grant. . . . . . . . . . . . . . . . . . . . . . . . . . 8
    4.2     Term of License. . . . . . . . . . . . . . . . . . . . . . . . . 8


[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -i-
<PAGE>

<S>                                                                         <C>
    4.3     Sublicenses. . . . . . . . . . . . . . . . . . . . . . . . . . . 8
    4.4     Usage Fees . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
    4.5     ActaLab Software Escrow. . . . . . . . . . . . . . . . . . . . . 9

ARTICLE 5 - MARKINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

    5.1     By ActaMed . . . . . . . . . . . . . . . . . . . . . . . . . . .10
    5.2     By SBCL. . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

ARTICLE 6 - DEVELOPMENT AGREEMENT AMENDMENTS . . . . . . . . . . . . . . . .11

ARTICLE 7 - WARRANTIES . . . . . . . . . . . . . . . . . . . . . . . . . . .11

    7.1     Warranty of Title and Noninfringement. . . . . . . . . . . . . .11
    7.2     Authorization. . . . . . . . . . . . . . . . . . . . . . . . . .12
    7.3     Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . .12

ARTICLE 8 - INDEMNITY. . . . . . . . . . . . . . . . . . . . . . . . . . . .12

    8.1     General. . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
    8.2     Services . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
    8.3     Infringement . . . . . . . . . . . . . . . . . . . . . . . . . .13
    8.4     Claims Notice. . . . . . . . . . . . . . . . . . . . . . . . . .13
    8.5     Procedures Involving Non-Third Party Claims. . . . . . . . . . .13
    8.6     Procedures Involving Third Party Claims. . . . . . . . . . . . .14
    8.7     No Release for Fraud . . . . . . . . . . . . . . . . . . . . . .15
    8.8     Payment. . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
    8.9     Survival . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

ARTICLE 9 - LIMITATION OF LIABILITY. . . . . . . . . . . . . . . . . . . . .16

ARTICLE 10 - CONFIDENTIALITY . . . . . . . . . . . . . . . . . . . . . . . .16

ARTICLE 11 - ASSIGNMENT. . . . . . . . . . . . . . . . . . . . . . . . . . .16

    11.1    By SBCL. . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
    11.2    By ActaMed . . . . . . . . . . . . . . . . . . . . . . . . . . .17
    11.3    Other. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

ARTICLE 12 - DISPUTE RESOLUTION. . . . . . . . . . . . . . . . . . . . . . .17

    12.1    Informal Dispute Resolution. . . . . . . . . . . . . . . . . . .17
    12.2    Arbitration. . . . . . . . . . . . . . . . . . . . . . . . . . .18
    12.3    Immediate Injunctive Relief. . . . . . . . . . . . . . . . . . .19
    12.4    Jurisdiction . . . . . . . . . . . . . . . . . . . . . . . . . .19
    12.5    Continued Performance; Continuation of Licenses. . . . . . . . .19

ARTICLE 13 - MISCELLANEOUS . . . . . . . . . . . . . . . . . . . . . . . . .20

    13.1    Further Assurances . . . . . . . . . . . . . . . . . . . . . . .20
    13.2    Integration. . . . . . . . . . . . . . . . . . . . . . . . . . .20

                                       -ii-
<PAGE>

<S>                                                                         <C>
    13.3    Force Majeure. . . . . . . . . . . . . . . . . . . . . . . . . .20
    13.4    No Agency. . . . . . . . . . . . . . . . . . . . . . . . . . . .20
    13.5    No Waiver. . . . . . . . . . . . . . . . . . . . . . . . . . . .20
    13.6    Severability . . . . . . . . . . . . . . . . . . . . . . . . . .21
    13.7    Notices. . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
    13.8    Governing Law; Interpretation. . . . . . . . . . . . . . . . . .21

</TABLE>

                                          
                                     SCHEDULES

               Schedule A          SBCL Software

               Schedule B          Amendments to Development Agreement










                                       -iii-
<PAGE>
                          CONFIDENTIAL TREATMENT REQUESTED


                                  LICENSE AGREEMENT

          THIS LICENSE AGREEMENT ("License Agreement") dated December 31, 1997
(the "Effective Date") is by and between SMITHKLINE BEECHAM CLINICAL
LABORATORIES, INC., a Delaware corporation ("SBCL") and ACTAMED CORPORATION, a
Georgia corporation ("ActaMed").

          WHEREAS, SBCL and ActaMed have entered into an Assets Purchase
Agreement dated of even date herewith (the "Purchase Agreement") pursuant to
which ActaMed has agreed to purchase certain assets owned by SBCL and used to
provide certain services to health care service providers;

          WHEREAS, the Purchase Agreement contemplates that the parties will
enter into a license agreement substantially on the terms set forth herein, as
well as a Services Agreement (the "Services Agreement") pursuant to which
ActaMed shall provide certain services to SBCL and to health care service
providers;

          WHEREAS, SBCL and ActaMed have previously entered into a Development
Agreement dated October 31, 1997 (the "Development Agreement") pursuant to which
ActaMed agreed to perform certain development services; and

          WHEREAS, the parties desire to amend the provisions of the Development
Agreement pursuant to which SBCL authorized ActaMed to use SBCL software and
related materials in the performance of work under the Development Agreement,
and pursuant to which the parties allocated ownership of deliverables created
under the Development Agreement and intellectual property rights therein;

          NOW THEREFORE, in consideration of the foregoing premises and other
good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, and intending to be legally bound, SBCL and ActaMed agree as
follows:

                             ARTICLE 1  - DEFINITIONS

1.1    "ACTALAB SOFTWARE" means (i) any updated, upgraded, corrected, modified,
       or enhanced version of ProviderLink created by or for ActaMed, and any
       Derivative Works made from ProviderLink by or for ActaMed, and any other
       Software owned and employed by ActaMed in providing Information Services
       or related services in accordance with the terms of the Services
       Agreement, in each case embodying, incorporating or practicing the SBCL
       Software or any portion thereof, (ii) any compiler or other program
       reasonably required to create Object Code from the Source Code of the
       foregoing or use any of the foregoing in the provision of Information 
       Services, and (iii) any Documentation relating to any of the 

<PAGE>

       foregoing created by or for ActaMed.  Without limiting the foregoing, 
       "ActaLab Software" shall include [*] (as the term is defined in the 
       Services Agreement).

1.2    "AFFILIATE" of an entity means a company or other person controlling,
       controlled by or under common control with such entity.

1.3    "CONFIDENTIAL INFORMATION" means any and all proprietary information
       disclosed or made available by a party hereto to the other party
       pursuant to this License Agreement, whether in written, oral, magnetic,
       photographic, optical or other form and whether now existing or
       hereafter created, including, without limitation, all trade secrets,
       know-how, information systems, technology, data, computer programs,
       processes, methods, operational procedures, plans, strategies or
       results, and other information of a similar nature that is not generally
       disclosed by such party to the public.  Without limiting the foregoing,
       ActaMed's Confidential Information shall include the Source Code and
       Documentation for the ProviderLink Software and ActaLab Software, and
       SBCL's Confidential Information shall include the Source Code and
       Documentation for the SBCL Software and the SCAN Developments. 
       Confidential Information shall not include any information which (a) is
       proven by written evidence to have been in the receiving party's
       possession prior to disclosure by the other party; (b) is received from
       a third party having the right to disclose such information; (c) is or
       hereafter becomes public knowledge through no act or fault of the
       receiving party; or (d) is proven by written evidence to have been
       independently developed by the receiving party without access to the
       Confidential Information of the other party.

1.4    "DERIVATIVE WORK" means a work that is based upon one or more
       preexisting works, such as a revision, modification, translation,
       abridgment, condensation, expansion, or any other form in which such
       preexisting works may be recast, transformed, translated or adapted, and
       that, if prepared without authorization of the owner of the copyright in
       such preexisting work, would constitute a copyright infringement.  

1.5    "DOCUMENTATION" means manuals (e.g., user, utility reference and
       language reference) and other written materials that relate to
       particular Software, including materials useful for the operation of the
       Software by a user (collectively, "USER DOCUMENTATION"), and information
       (e.g., data flows, data structures, control logic, flow diagrams, and
       principles of operation) useful for design, modification and maintenance
       of the Source Code by a programmer (collectively, "PROGRAMMER
       DOCUMENTATION").

1.6    "EXCLUSIVE DEVELOPMENTS" shall have the meaning ascribed to it by
       Section V.E of the Services Agreement.

1.7    "HEALTH CARE FIELD" means the provision of electronic data interchange
       technology relating to patients, patient-related services or the
       practice of medicine, to Providers, Healthcare Payors and Healthcare
       Administrators.  "Healthcare Payor," for the purposes of this
       definition, means any person or entity that pays for the provision of
       healthcare services, 


[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -2-
<PAGE>

       including without limitation employers, insurance companies, 
       regional healthcare alliances, and federal, state and local 
       governmental agencies.  "Healthcare Administrator" means those 
       entities engaged in the administration of healthcare services, 
       including without limitation managed care companies, utilization 
       review companies and third party administrators. Notwithstanding 
       the foregoing, "Health Care Field" shall exclude services relating 
       to or provided to [*].

1.8    "INFORMATION SERVICES" means the transmission of orders for laboratory
       tests and/or laboratory test results and reports.

1.9    "OBJECT CODE" means the form of Software resulting from the translation
       or processing of the Source Code by a computer into machine language or
       intermediate code in a form that is not convenient to human
       understanding but which is appropriate for execution or interpretation
       by a computer, together with related User Documentation.

1.10   "OTHER LAB" shall have the meaning ascribed to it by the Services
       Agreement.

1.11   "PROVIDERLINK" means the ActaMed proprietary Software known as
       ProviderLink as it exists on the Effective Date, together with any
       updates, upgrades, enhancements, modifications or Derivative Works made
       thereto or therefrom by or for ActaMed other than under the licenses
       granted by this License Agreement, and the Specifications and
       Documentation relating to and of the foregoing prepared by or for
       ActaMed.

1.12   [*].

1.13   "PROVIDERS" means physicians, clinics, hospitals and other providers of
       clinical health care services other than [*].

1.14   "RELATED ENTITY" means an entity that is engaged in the laboratory
       testing business and in which SBCL or an SBCL affiliate has a legal or
       beneficial ownership of ten percent (10%) or more.

1.15   "SBCL SOFTWARE" means the Software described in Schedule A hereto. 
       "SBCL Software" shall in no event be construed to include [*] or Third 
       Party Software.

1.16   "SBCL TRADEMARK" means SBCL's trade names, logos, trademarks, trade
       devices, product names and/or service marks.

1.17   "SCAN AGREEMENTS" means the Development Agreement, Purchase Agreement,
       Services Agreement and this License Agreement.


[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -3-
<PAGE>

1.18   "SCAN DEVELOPMENTS" means (i) any updated, upgraded, corrected,
       modified, or enhanced version of the SBCL Software created by or for
       ActaMed under the rights granted by this License Agreement, and (ii) any
       Documentation relating to any of the foregoing created by or for
       ActaMed, provided, that SCAN Developments shall in no event be construed
       to include the ActaLab Software.  

1.19   "SOFTWARE" means computer programming code consisting of Object Code
       and/or Source Code and/or associated procedural code, as applicable,
       including updates and revisions thereto.

1.20   "SOURCE CODE" means program instructions and codes written by humans
       with the intention that the instructions and codes be compiled and
       interpreted by a computer, including all existing commentary,
       explanations, control procedures, record layouts for all files and
       program listings-source codes, design documentation, user manuals,
       programmers' guides, system guides, current compilation instructions,
       and all other User Documentation and Programmer Documentation.

1.21   "SPECIFICATIONS" means a description of the design, operating
       procedures, performance, functions and other requirements for Software.

1.22   "TERRITORY" means the United States of America, including all
       territories and possessions thereof.

1.23   "THIRD PARTY SOFTWARE" means Software that SBCL prior to the Effective
       Date licensed from third parties for use in delivery of automated order
       entry and results reporting services, including without limitation
       Software known as [*] and [*].

1.24   "TRIGGER DATE" shall have the meaning ascribed to it by Section 4.4.1
       hereof.

                  ARTICLE 2 - LICENSE GRANTS; RELATED PROVISIONS

2.1    SCAN DEVELOPMENT LICENSE.  Subject to the terms and conditions of this
       License Agreement, SBCL hereby grants ActaMed a perpetual, irrevocable,
       nonexclusive, non-transferable (except as otherwise expressly set forth
       herein) right and license in the Health Care Field in the Territory to:

       2.1.1   possess and use the SBCL Software to update, upgrade, enhance,
               modify and create Derivative Works from the SBCL Software and
               otherwise create SCAN Developments; and 

       2.1.2   possess and use, update, upgrade, enhance, modify and create
               Derivative Works from the SBCL Software, SCAN Developments and
               ActaLab Software; 


[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -4-
<PAGE>

       2.1.3   possess and use the SBCL Software and SCAN Developments for the
               purposes of performing ActaMed's obligations under the SCAN
               Agreements; and

       2.1.4   possess and use the SCAN Developments for the purpose of
               providing Information Services in support of the laboratory
               testing services offered by Other Labs only to the extent such
               SCAN Developments do not constitute Exclusive Developments under
               the Service Agreement.

       The foregoing license shall include the right to (i) sublicense the SBCL
       Software and/or SCAN Developments to one or more contractors performing
       the activities described in Sections 2.1.1 or 2.1.2 hereof for ActaMed's
       benefit and for ActaMed's account, and (ii) sublicense Providers, [*]
       and Other Labs to use the Object Code version of the SBCL Software
       and/or the SCAN Developments as ActaMed reasonably determines necessary
       or appropriate in connection with its provision of the services
       contemplated by Section 2.1.3, in each case provided that each
       sublicensee executes a written agreement (x) prohibiting such
       sublicensee from disclosing SBCL Confidential Information or using the
       same other than as contemplated by this Section 2.1, and (y) precluding
       the sublicensee or any of its employees or agents from gaining or
       holding any right or interest in the SBCL Software. 

2.2    ACTALAB DEVELOPMENT LICENSE

       2.2.1   GRANT.  Subject to the terms and conditions of this License
               Agreement, SBCL hereby grants ActaMed a perpetual, irrevocable,
               nonexclusive, non-transferable (except as otherwise expressly set
               forth herein) right and license to possess and use the SBCL
               Software to update, upgrade, enhance, modify and create
               Derivative Works from ProviderLink and otherwise create ActaLab
               Software pursuant to the Development Agreement and otherwise. 
               The license granted by this Section 2.2.1 shall survive the
               termination of this License Agreement.

       2.2.2   OWNERSHIP.  Ownership of Deliverables (as defined by the
               Development Agreement) relative to the ActaLab Software shall be
               governed by Section 5 of the Development Agreement, as amended. 
               Ownership of all other ActaLab Software and all intellectual
               property rights therein (including but not limited to copyrights
               and all renewals and extensions thereof) shall vest in ActaMed,
               except that nothing in this Agreement shall be construed to
               transfer to ActaMed, or otherwise divest SBCL of SBCL's ownership
               of, the SBCL Software or SCAN Developments or the patents,
               copyrights, trade secrets and other intellectual property rights
               therein.  ActaMed shall own the ActaLab Software Exclusive
               Developments.

2.3    CONDITIONS.  

       2.3.1   As a material inducement for SBCL's grant of the licenses
               contemplated by this Agreement and the amendments to the 
               Development Agreement contemplated by 


[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -5-
<PAGE>

               Article 6 of this Agreement, ActaMed hereby covenants and 
               agrees that, except as SBCL may authorize in writing, ActaMed 
               (and any sublicensee of ActaMed) shall use the ActaLab 
               Software solely within the Territory and solely in the Health 
               Care Field. 

       2.3.2   ActaMed further covenants and agrees that, except as SBCL may
               otherwise agree in writing, ActaMed shall not use or license the
               use of the ActaLab Software Exclusive Developments for the
               benefit of any party other than in support of SBCL's laboratory
               testing services.

2.4    TECHNOLOGY TRANSFER.  SBCL, within thirty (30) days following the
       Effective Date, shall provide ActaMed with one copy of all currently
       existing SBCL Software not previously provided in connection with the
       Development Agreement or otherwise.  Thereafter, during the term of the
       Services Agreement, SBCL shall promptly provide ActaMed with such
       updates, upgrades and enhancements to the SBCL Software as SBCL, in its
       sole discretion, may make or have made during the term of the Services
       Agreement.

2.5    ROYALTIES.  

       2.5.1   If ActaMed uses the SBCL Software, SCAN Developments or ActaLab
               Software in the provision of Information Services to [*] ActaMed
               shall agree to pay SBCL a royalty equal to [*] of Royalty 
               Revenues for the Royalty Period applicable to such [*].  "Royalty
               Revenues," for these purposes, means the [*] ActaMed collects for
               such Information Services.  The "Royalty Period," with respect to
               Software or services provided in support of a given [*] means 
               the [*] period commencing on the date [*].

       2.5.2   The royalties accruing pursuant to this Section 2.4 shall be
               payable on a [*] basis, and shall be due within [*] days 
               following the end of the [*] in which they accrue.  Each such 
               royalty payment shall be accompanied by a report showing, by each
               [*] the total Royalty Revenue collected during the applicable 
               [*] and the royalty amount due in respect of such Royalty 
               Revenue.

            ARTICLE 3 - SCAN DEVELOPMENTS OWNERSHIP; RELATED PROVISIONS

3.1    OWNERSHIP.  

       3.1.1   Subject to the provisions of Section 3.2 hereof, SBCL, as between
               ActaMed and SBCL, shall have sole and exclusive ownership in and
               title to the SBCL Software and SCAN Developments, including all
               intellectual property rights therein.  Without limiting the
               foregoing, the SCAN Developments shall be "works made for hire"
               for 


[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -6-
<PAGE>

               the benefit of SBCL.  To the extent that any of the SCAN
               Developments, by operation of law, may not be works made for
               hire, or to the extent ActaMed otherwise would retain any rights
               in the SCAN Developments, ActaMed, subject to the provisions of
               Section 3.2.2 hereof, hereby assigns to SBCL the ownership of any
               patent or copyright in the SCAN Developments and SBCL shall have
               the right to obtain and hold in its own name copyrights, patents,
               registrations and similar protections which may be available with
               respect to the SCAN Developments. 

       3.1.2   Nothing in this Agreement shall be construed to transfer to SBCL,
               or otherwise divest ActaMed of ActaMed's ownership of,
               ProviderLink, the ActaLab Software or the patents, copyrights,
               trade secrets and other intellectual property rights therein,
               provided, that, subject to the provisions of Section 3.2.1
               hereof, ActaMed hereby grants SBCL a perpetual, nonexclusive,
               royalty-free license (with right of sublicense) under such
               intellectual property rights to use, possess, update, upgrade,
               enhance, modify, reproduce, market, distribute and sell the SCAN
               Developments.

       3.1.3   ActaMed shall provide SBCL with the Source Code for the SCAN
               Developments on or before the first release of the same to a
               commercial customer or the use of the same in providing a
               commercial service (the "Release Date") and, thereafter, on or
               before the Release Date of any updates, upgrades, enhancements or
               modifications thereto and, in any event, [*] during the term of 
               the Services Agreement (including any renewal terms thereof).

3.2    LIMITATIONS.  

       3.2.1   SBCL covenants and agrees that, prior to the expiration or
               termination of the Services Agreement, it shall not use, or
               sublicense any other party to use, the SCAN Developments except
               (i) in the Territory solely for the purpose of performing
               Information Services in support of the laboratory testing
               services offered [*] that has not been transferred to ActaMed
               pursuant to the Purchase Agreement, and (ii) outside of the
               Territory.  In the event SBCL uses the SCAN Developments to
               provide Information Services in support of [*] within the
               Territory, SBCL shall pay ActaMed a usage fee to be negotiated by
               the parties, such usage fee to be determined in accordance with
               the provisions, and during the term, of the Services Agreement.

       3.2.2   Except to the extent such SCAN Developments constitute Exclusive
               Developments, nothing in this Agreement shall be construed to (i)
               grant SBCL or any other party ownership of such portions of the
               SCAN Developments as are devoted solely to the process of
               checking patient eligibility for third party payor benefits or
               reimbursement, or claim status checking (collectively,
               "Eligibility Services"), or (ii) grant SBCL any right or license
               to use the SCAN Developments for the purposes of performing or
               providing Eligibility Services, except that SBCL shall not be
               required to delete or 


[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -7-

<PAGE>

               remove the Eligibility Code from the SCAN Developments prior 
               to exercising the rights and licenses granted by this Article 
               3.

                               ARTICLE 4 - LICENSE BACK

4.1    LICENSE GRANT.  Subject to the provisions of this Article 4, ActaMed
       hereby grants SBCL an irrevocable, nonexclusive, non-transferable
       (except as expressly set forth herein) right and license in the
       Territory in the Health Care Field to:

       4.1.1   possess and use the ActaLab Software to create [*] and update,
               upgrade, modify, enhance and create Derivative Works from [*] 
               (such Derivative Works being referred to herein as the [*]) as 
               SBCL reasonably determines necessary to perform Information 
               Services in support of laboratory test services offered by SBCL
               and/or Related Entities, including without limitation to ensure
               compliance with laws and regulations applicable to the business
               of SBCL and Related Entities, PROVIDED, that SBCL covenants and
               agrees that it shall not exercise the licenses granted by this 
               Section 4.1.1 prior to the earlier of [*] (the "Trigger Date");
               and

       4.1.2   possess and use [*] and [*] for internal business purposes of 
               SBCL and Related Entities, including without limitation the 
               provision of Information Services to Providers in support of 
               their respective laboratory testing services, PROVIDED, that 
               SBCL covenants and agrees that it shall not exercise the licenses
               granted by this Section 4.1.2 prior to the date on which the 
               Services Agreement expires as a result of ActaMed's notice of 
               nonrenewal or the date on which the Services Agreement terminates
               for ActaMed's breach, as applicable.

4.2    TERM OF LICENSE.  The licenses granted by this Article 4 shall expire on
       [*] on which SBCL first uses ActaLabSB on a commercial basis in support 
       of SBCLs laboratory testing services.

4.3    SUBLICENSES.  The licenses granted by Section 4.1 shall include the
       right to (a) sublicense the ActaLab Software, and [*] to one or more 
       contractors performing any of the foregoing for the benefit and account
       of SBCL or a Related Entity, and (b) sublicense Providers to use the 
       Object Code version of [*] as reasonably may be required to provide the
       services contemplated by Section 4.1.2, in each case provided that each 
       sublicensee executes a written agreement (x) prohibiting such sublicensee
       from disclosing ActaMed Confidential Information or using the same other
       than as contemplated 


[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -8-
<PAGE>

       by this Article 4, and (y) precluding the sublicensee or any of 
       its employees or agents from gaining or holding any right or 
       interest in the ActaLab Software.

4.4    USAGE FEES.

       4.4.1   SBCL, in addition to the other consideration contemplated by the
               SCAN Agreements, agrees to pay, as a royalty, a Usage Fee on each
               Royalty Transaction.  For the purposes of this Section 4.4.1:

                 (i)  "Royalty Transaction" means a Requisition (as defined in
                      the Services Agreement) entered [*] (pursuant to Sections
                      XII.E.1.b or XII.E.3.c. of the Services Agreement) to or 
                      for a site other than one of the Permitted Number of 
                      sites.

                (ii)  "Usage Fee" means the lesser of (i) [*] per Requisition 
                      and [*] of the Transaction Fee then prevailing under 
                      Article IV of the Services Agreement or (ii) [*] of an 
                      amount competitive with the market for Information
                      Services, such amount [*] to be calculated in accordance
                      with the principles established by Section IV of the
                      Services Agreement. 

               (iii)  "Permitted Number" means [*] the number of sites [*] the
                      largest number of sites with respect to which [*].

       4.4.2   The royalties accruing pursuant to this Section 4.4 shall be
               payable on a [*] and shall be due within [*] days following the
               end of the [*] in which they accrue.  Each such royalty payment
               shall be accompanied by a report showing the manner in which the
               payment amount was calculated.

4.5    ACTALAB SOFTWARE ESCROW.  

       4.5.1   Promptly upon the execution of this License Agreement, ActaMed
               shall give written notice to Fort Knox Escrow Services, Inc.
               ("Fort Knox") instructing Fort Knox to add SBCL to the list of
               Licensees maintained pursuant to that certain Master Escrow
               Agreement dated February 20, 1995 (the "Escrow Agreement"). 
               ActaMed shall deposit the Source Code for all ActaLab Software in
               accordance with the terms of the Escrow Agreement on or before
               the first release of the same to a commercial customer or the use
               of the same in providing a commercial service (the "Release
               Date") and, thereafter, on or before the Release Date of any
               updates, upgrades, 


[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -9-
<PAGE>

               enhancements or modifications thereto and, in any event, no 
               less often than once [*] during the term of the Services 
               Agreement (including any renewal terms thereof).  
               
       4.5.2   ActaMed, within thirty (30) days of the date of this Agreement
               shall enter into an amendment to the Escrow Agreement with Fort
               Knox, reasonably acceptable to SBCL in form and substance, to the
               effect that Fort Knox, at SBCL's request and expense, agrees to
               inspect the deposit materials supplied by ActaMed for the purpose
               of confirming their identity and completeness. 

       4.5.3   ActaMed, promptly upon SBCL's demand made at any time following
               the Trigger Date, shall notify Fort Knox in accordance with
               Section 4.1(a) of the Escrow Agreement to deliver the Source Code
               for the ActaLab Software to SBCL, which notice shall be
               accompanied by the fees specified in such Section 4.1(a).  

       4.5.4   ActaMed covenants and agrees to maintain the Escrow Agreement in
               full force and effect during the term of the Services Agreement,
               and acknowledges that its failure to do so will constitute a
               material breach of this License Agreement and the Services
               Agreement.

       4.5.5   ActaLab hereby appoints SBCL as its attorney in fact for the
               limited purpose of providing to Fort Knox the notices
               contemplated by this Section 4.4.1 and 4.4.3.

                                 ARTICLE 5 - MARKINGS

5.1    BY ACTAMED.  ActaMed shall reproduce SBCLs copyright notice on all SBCL
       Software and SCAN Developments in accordance with the practice
       prevailing in the software industry.  Subject to the foregoing sentence:

       5.1.1   ActaMed, on or before the date on which ActaMed switches any site
               from the SBCL gateway to the ActaMed gateway (as described in
               Section II.B of the Services Agreement), shall remove SBCL
               Trademarks from the sign-on screen for the ActaLab Software and
               SCAN Developments resident on the computer at such site, and from
               any other screens that might reasonably suggest that SBCL, rather
               than ActaMed, is the source of the Information Services provided
               using such Software; and 

       5.1.2   ActaMed, with the reasonable assistance of SBCL's Distribution
               Service Representatives in accordance with Section II.B.4 of the
               Services Agreement, shall remove SBCL Trademarks from any
               equipment owned or controlled by ActaMed and located at a given
               site within three (3) months of the Transfer Date for such site,
               but in any event prior to the date on which ActaMed transfers
               ownership of such equipment to any other party. 


[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -10-
<PAGE>

5.2    BY SBCL.  SBCL shall reproduce ActaMeds copyright notice on all copies
       of the ActaLab Software in accordance with the practice prevailing in
       the software industry.

                     ARTICLE 6 - DEVELOPMENT AGREEMENT AMENDMENTS

The parties hereby agree to amend the Development Agreement as set forth in
Schedule B hereto. 

                        ARTICLE 7 - WARRANTIES

7.1    WARRANTY OF TITLE AND NONINFRINGEMENT.

       7.1.1   ActaMed represents and warrants to SBCL that:

                 (i)  Unless ActaMed provides SBCL with advance written notice
                      to the contrary in accordance with Section 5.2(b) of the
                      Development Agreement, ActaMed is and will be the sole
                      author of all works used by ActaMed in preparing the
                      ActaLab Software and SCAN Developments;

                (ii)  ActaMed shall require all officers, employees,
                      contractors, representatives and agents who provide
                      services with respect to the ActaLab Software, SBCL
                      Software or SCAN Developments under the SCAN Agreements
                      to assign to ActaMed all intellectual property rights
                      created or arising therein;

               (iii)  Subject to the provisions of Section 7.1.2 hereof,
                      ActaMed has and will have full and sufficient right in
                      the ActaLab Software to grant the licenses and rights
                      contemplated by Article 4 of this License Agreement, free
                      and clear of any liens, claims or encumbrances; 

                (iv)  Subject to the provisions of Section 7.1.2 hereof, the
                      terms and conditions set forth in Article 3 hereof are
                      sufficient to convey to SBCL all right, title and
                      interest in and to the SCAN Developments, and following
                      such conveyance neither ActaMed nor any third party shall
                      retain any right, title or interest in the SCAN
                      Developments other than the licenses expressly set forth
                      herein; and

                 (v)  Subject to the provisions of Section 7.1.2 hereof, none
                      of the ActaLab Software or SCAN Developments infringes
                      any patents, copyrights, trademarks, or other
                      intellectual property rights (including trade secrets),
                      privacy or similar rights of any third party, nor has any
                      claim of such infringement been threatened or asserted.

                                       -11-
<PAGE>

       7.1.2   SBCL represents and warrants to ActaMed that:

                 (i)  SBCL is the sole author of the SBCL Software;

                (ii)  SBCL has required all officers, employees, contractors,
                      representatives and agents who prior to the date of this
                      Agreement provided services with respect to the Software
                      to assign to SBCL all intellectual property rights
                      created or arising therein;

               (iii)  SBCL has and will have full and sufficient right in the
                      SBCL Software to grant the licenses and rights
                      contemplated by Article 2 of this License Agreement, free
                      and clear of any liens, claims or encumbrances; and

                (iv)  none of the SBCL Software provided to ActaMed by SBCL
                      hereunder infringes any patents, copyrights, trademarks,
                      or other intellectual property rights (including trade
                      secrets), privacy or similar rights of any third party,
                      nor has any claim of such infringement been threatened or
                      asserted.

7.2    AUTHORIZATION.  Each of ActaMed and SBCL represents and warrants that,
       as of the Effective Date of this License Agreement (i) it is duly
       authorized to enter into this License Agreement, and (ii) it is free of
       any obligation or restriction that would prevent it either from entering
       into or performing this License Agreement.

7.3    DISCLAIMERS.  THE FOREGOING WARRANTY IS IN LIEU OF ANY OTHER WARRANTY,
       EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES
       OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE WHICH ARE HEREBY
       SPECIFICALLY EXCLUDED AND DISCLAIMED.  WITHOUT LIMITING THE FOREGOING,
       (i) NOTHING IN THIS LICENSE AGREEMENT SHALL BE CONSTRUED TO EXPAND OR
       EXTEND THE WARRANTIES ACTAMED GRANTS IN THE OTHER SCAN AGREEMENTS WITH
       RESPECT TO THE ACTALAB SOFTWARE OR SCAN DEVELOPMENTS, AND (ii) SUBJECT
       TO SUCH WARRANTIES AND REPRESENTATIONS AS ARE CONTAINED IN THE OTHER
       SCAN AGREEMENTS, ACTAMED ACKNOWLEDGES THAT SBCL IS LICENSING THE SBCL
       SOFTWARE TO ACTAMED ON AN AS IS BASIS, AND HEREBY DISCLAIMS ANY
       WARRANTIES WITH RESPECT TO THE OPERATION THEREOF.

                                ARTICLE 8 - INDEMNITY

8.1    GENERAL. Each party hereto shall indemnify, defend and hold harmless the
       other party and its officers, employees, representatives and agents
       against any and all damages, losses, or expenses suffered or paid as a
       result of any claims, demands, suits, causes of action, 

                                       -12-
<PAGE>

       proceedings, awards, judgments, and liabilities (including 
       reasonable attorneys fees) incurred in litigation, arbitration 
       or otherwise, assessed, incurred, or sustained (each, a Claim) 
       with respect to or arising out of the breach by the 
       Indemnifying Party of any representation, warranty, covenant 
       or agreement made herein. 

8.2    SERVICES.  ActaMed shall indemnify, defend and hold harmless SBCL and
       its officers, employees, representatives and agents against any Claim
       arising from or relating to ActaMeds provision of the ActaLab Software,
       SCAN Developments or any services, in each case in support of any Other
       Lab pursuant to this License Agreement.  SBCL shall indemnify, defend
       and hold harmless ActaMed and its officers, employees, representatives
       and agents against any Claim arising from or relating to SBCLs provision
       of the SCAN Developments or any services outside the Territory or to [*]
       as contemplated by Section 3.2 hereof.

8.3    INFRINGEMENT.  

       8.3.1   ActaMed, subject to the provisions of Section 8.3.2 hereof, shall
               indemnify, defend and hold harmless SBCL and the Related Entities
               and their respective officers, employees, representatives and
               agents against any Claim alleging the ActaLab Software or any
               SCAN Development infringes or constitutes misappropriation of any
               U.S. or foreign patent or any other U.S. or foreign proprietary
               right of a third party. 

       8.3.2   SBCL shall indemnify, defend and hold harmless ActaMed and its
               Affiliates and their respective officers, employees,
               representatives and agents against any Claim alleging the SBCL
               Software infringes or constitutes misappropriation of any U.S. or
               foreign patent or any other U.S. or foreign proprietary right of
               a third party. 

8.4    CLAIMS NOTICE.  A Claim shall be made by any entity or individual
       eligible for indemnification pursuant to this Article 8 (an Indemnitee)
       by delivery of a Claims Notice to the party owing a duty of
       indemnification under this Article 8 (the Indemnifying Party) requesting
       indemnification and specifying the basis on which indemnification is
       sought and the amount of asserted Losses (as defined in the Services
       Agreement) and, in the case of a Third Party Claim (as defined in the
       Services Agreement), containing (by attachment or otherwise) such other
       information as such Indemnitee shall have concerning such Third Party
       Claim.  

8.5    PROCEDURES INVOLVING NON-THIRD PARTY CLAIMS.  If the Claim involves a
       matter other than a Third Party Claim, the Indemnifying Party shall
       raise any objection to such Claim within a reasonable period of time by
       delivery of a written notice of such objection to such Indemnitee
       specifying in reasonable detail the basis for such objection.  If an
       objection is timely interposed by the Indemnifying Party, the
       Indemnifying Party and the Indemnitee shall cooperate in the compromise
       of the Claim or resolve any disagreement in accordance with Article 12
       hereof.


[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -13-
<PAGE>

8.6    PROCEDURES INVOLVING THIRD PARTY CLAIMS.  The obligations and
       liabilities of the parties hereunder with respect to a Third Party Claim
       shall be subject to the following terms and conditions:

       8.6.1   The Indemnitee shall give the Indemnifying Party written notice
               of a Third Party Claim promptly after receipt by the Indemnitee
               of notice thereof, and the Indemnifying Party may undertake the
               defense, compromise and settlement thereof by representatives of
               its own choosing reasonably acceptable to the Indemnitee.  The
               failure of the Indemnitee to notify the Indemnifying Party of
               such claim shall not relieve the Indemnifying Party of any
               liability that they may have with respect to such claim except to
               the extent the Indemnifying Party demonstrates that the defense
               of such claim is prejudiced by such failure.  The assumption of
               the defense, compromise and settlement of any such Third Party
               Claim by the Indemnifying Party shall be an acknowledgment of the
               obligation of the Indemnifying Party to indemnify the Indemnitee
               with respect to such claim hereunder.  If the Indemnitee desires
               to participate in, but not control, any such defense, compromise
               and settlement, it may do so at its sole cost and expense.  If,
               however, the Indemnifying Party fails or refuses to undertake the
               defense of such Third Party Claim within ten (10) days after
               written notice of such claim has been given to the Indemnifying
               Party by the Indemnitee, the Indemnitee shall have the right to
               undertake the defense, compromise and settlement of such claim
               with counsel of its own choosing.  In the circumstances described
               in the preceding sentence, the Indemnitee shall, promptly upon
               its assumption of the defense of such claim, make a Claim as
               specified in Section 8.3 which shall be deemed a Claim that is
               not a Third Party Claim for the purposes of the procedures set
               forth herein.

       8.6.2   If, in the reasonable opinion of the Indemnitee, any Third Party
               Claim or the litigation or resolution thereof involves an issue
               or matter which could have a material adverse effect on the
               business, operations, assets, properties or prospects of the
               Indemnitee, the Indemnitee shall have the right to control the
               defense, compromise and settlement of such Third Party Claim
               undertaken by the Indemnifying Party, and the reasonable costs
               and expenses of the Indemnitee in connection therewith shall be
               included as part of the indemnification obligations of the
               Indemnifying Party hereunder.  If the Indemnitee shall elect to
               exercise such right, the Indemnifying Party shall have the right
               to participate in, but not control, the defense, compromise and
               settlement of such Third Party Claim at its sole cost and
               expense.

       8.6.3   No settlement of a Third Party Claim involving the asserted
               liability of the Indemnifying Party under this Article shall be
               made without the prior written consent by or on behalf of the
               Indemnifying Party, which consent shall not be unreasonably
               withheld or delayed.  If the Indemnifying Party assumes the
               defense of such a Third Party Claim, (1) no compromise or
               settlement thereof may be effected by the Indemnifying Party
               without the Indemnitee's consent unless (a) there is no finding
               or 

                                       -14-
<PAGE>

               admission of any violation of law or any violation of the
               rights of any person and no effect on any other claim that may be
               made against the Indemnitee (b) the sole relief provided is
               monetary damages that are paid in full by the Indemnifying Party
               and (c) the compromise or settlement includes, as an
               unconditional term thereof, the giving by the claimant or the
               plaintiff to the Indemnitee of a release, in form and substance
               satisfactory to the Indemnitee, from all liability in respect of
               such Third Party Claim, and (2) the Indemnitee shall have no
               liability with respect to any compromise or settlement thereof
               effected without its consent.

8.7    NO RELEASE FOR FRAUD.  Nothing contained in this Agreement shall relieve
       or limit the liability of a party or any officer or director of such
       party from any Liability arising out of or resulting from common law
       fraud or intentional misrepresentation in connection with the
       transactions contemplated by this Agreement or in connection with the
       delivery of this Agreement.  Each ActaMed Indemnitee or SBCL Indemnitee,
       as the case may be, shall have a right to indemnification for any Loss
       incurred as the result of any common law fraud or intentional
       misrepresentation by SBCL or ActaMed, respectively, or any officer or
       director thereof.

8.8    PAYMENT.  

       8.8.1   If any party is required to make any payment under this Article
               8, such party shall promptly pay the Indemnified Party the amount
               so determined.  If there is a dispute as to the amount or manner
               of determination of any indemnity obligation owed under this
               Article 8, the Indemnifying Party shall nevertheless pay when due
               such portion, if any, of the obligation as shall not be subject
               to dispute.  The difference, if any, between the amount of the
               obligation ultimately determined as properly payable under this
               Article 8 and the portion, if any, theretofore paid shall bear
               interest as set forth in Section 8.8.3 hereof.

       8.8.2   Any items as to which an Indemnified Party is entitled to payment
               under this Article may be paid by set off against amounts payable
               to the Indemnifying Party to the extent that such amounts are
               sufficient to pay such items.

       8.8.3   If all or part of any indemnification obligation under this
               Agreement is not paid when due, then the Indemnifying Party shall
               pay the Indemnified Party interest on the unpaid principal amount
               of the obligation from the date the amount became due until
               payment in full, at the per annum rate of interest announced from
               time to time by NationsBank South, N.A., to be its "prime rate."

8.9    SURVIVAL.  The provisions of this Article 8 shall survive the
       termination of this License Agreement.

                                       -15-
<PAGE>

                         ARTICLE 9 - LIMITATION OF LIABILITY

NEITHER PARTY SHALL BE LIABLE TO THE OTHER PARTY IN TORT, CONTRACT OR OTHERWISE
FOR ANY LOST PROFITS, SPECIAL, INDIRECT, INCIDENTAL, PUNITIVE OR CONSEQUENTIAL
DAMAGES ARISING OUT OF, OR IN CONNECTION WITH THIS LICENSE AGREEMENT THAT THE
OTHER PARTY, OR ANY THIRD PARTY, MAY INCUR, EXPERIENCE OR CLAIM, EVEN IF THE
PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH CLAIM.

                             ARTICLE 10 - CONFIDENTIALITY

In the course of exercising this License Agreement each party will likely obtain
Confidential Information of the other party.  The parties agree to safeguard
against the unauthorized use and disclosure of any Confidential Information and
to use the same degree of care that each uses to protect its own information of
a similar nature, but in no event less than a reasonable degree of care under
the circumstances.  Neither party to this License Agreement will disclose the
other party's Confidential Information to any third person, except (i) with the
prior written consent of the other party; (ii) to the extent necessary to comply
with law or legal process, in which event the party making the disclosure will,
subject to applicable law, notify the other party as promptly as practicable
prior to making any disclosure and seek confidential treatment of the
information; (iii) to the extent necessary, as a part of its normal reporting or
review procedure to its parent company, or its auditors and attorneys on a
confidential basis; or (iv) in connection with the enforcement of the party's
rights hereunder or under any related agreements.  The parties hereto agree to
restrict disclosure of the Confidential Information solely to its employees or
others under its control who have a need to know the same in furtherance of the
purposes of this License Agreement and who have been directed and contractually
or legally restricted from disclosing the Confidential Information at least to
the degree required under this License Agreement.  Each party shall be liable to
the other for any breach of the covenants of confidentiality contained herein by
its agents or employees.  The provisions of this section shall survive the
expiration or termination of this License Agreement.

                               ARTICLE 11 - ASSIGNMENT

11.1   BY SBCL.  SBCL may assign all of its rights and obligations under this
       License Agreement or any license granted hereunder to any Affiliate, or
       to any corporation or other entity pursuant to a merger, consolidation,
       or other reorganization.  SBCL agrees to notify ActaMed of any such
       assignment, in writing, specifying the name and address of the other
       entity.  

                                       -16-
<PAGE>

11.2   BY ACTAMED.  ActaMed may assign all of its rights and obligations under
       this License Agreement or any license granted hereunder to any Affiliate
       or to any other corporation or other entity pursuant to a merger,
       consolidation, or other reorganization.  ActaMed agrees to notify SBCL
       at least thirty (30) days prior to the date of any such assignment, in
       writing, specifying the name and address of the assignee. 
       Notwithstanding the foregoing:

                 (i)  Nothing in this License Agreement shall be construed to
                      authorize ActaMed to assign this License Agreement to any
                      assignee if such assignee or any Affiliate of the
                      assignee is engaged in the business of performing
                      laboratory services similar to those performed by SBCL as
                      of the date of the assignment, and

                (ii)  SBCL shall have the right to require ActaMed to void the
                      assignment if the assignee or any Affiliate of the
                      assignee enters the business of performing laboratory
                      services similar to those performed by SBCL as of the
                      date of this Agreement or the date of the assignment.

11.3   OTHER.  Except as expressly set forth in this Article 11 and except as
       the other party may consent in writing, neither party may assign or
       transfer this License Agreement or any right or obligation hereunder to
       any third party, and any attempt to do so in contravention of this
       Article 11 shall be void and shall have no force or effect.  

                          ARTICLE 12 - DISPUTE RESOLUTION

12.1   INFORMAL DISPUTE RESOLUTION. Any dispute between the parties arising out
       of or with respect to this License Agreement, either with respect to the
       interpretation of any provision of this Agreement or with respect to the
       performance by ActaMed or SBCL, shall be resolved as provided in this
       Article.

       12.1.1  Prior to the initiation of formal dispute resolution procedures,
               the parties shall first attempt to resolve their dispute
               informally, as follows:

                 (i)  The Representatives (as defined in the Services
                      Agreement) for each party shall meet for the purpose of
                      endeavoring to resolve such dispute.  They shall meet as
                      often as the parties reasonably deem necessary in order
                      to gather and furnish to the other all information with
                      respect to the matter in issue which the parties believe
                      to be appropriate and germane in connection with its
                      resolution.  The Representatives shall discuss the
                      problem and negotiate in good faith in an effort to
                      resolve the dispute without the necessity of any formal
                      proceeding.  During the course of negotiations, all
                      reasonable requests made by one party to another for
                      nonprivileged information, reasonably 

                                       -17-

<PAGE>

                      related to this Agreement, shall be honored in order that 
                      each of the parties may be fully advised of the other's 
                      position.
                      
                (ii)  If, within fifteen (15) days after a matter has been
                      identified for resolution pursuant to this Article,
                      either of the Representatives concludes in good faith
                      that amicable resolution through continued negotiation in
                      this forum does not appear likely, the matter will be
                      escalated by formal written notification to the SBCL
                      President and the ActaMed President (both as defined in
                      the Services Agreement).  The parties will use their
                      respective best efforts to cause the SBCL President and
                      the ActaMed President to meet to attempt to resolve the
                      dispute.

               (iii)  Formal proceedings for the resolution of a dispute may
                      not be commenced until the earlier of:  (i) the date on
                      which the SBCL President and the ActaMed President
                      conclude in good faith that amicable resolution through
                      continued negotiation of the matter does not appear
                      likely; or (ii) thirty (30) days after the dispute has
                      been referred to the SBCL President and the ActaMed
                      President.

       12.1.2  The provisions of this Article 12 shall not be construed to
               prevent a party from instituting, and a party is authorized to
               institute, formal proceedings earlier to avoid the expiration of
               any applicable limitations period.

12.2   ARBITRATION.  If the parties are unable to resolve any controversy
       arising under this Agreement as contemplated by Section 12.1 and if such
       controversy is not subject to Section 12.3 or Section 12.4, then such
       controversy shall be submitted to mandatory and binding arbitration at
       the election of either Party (the Disputing Party) pursuant to the
       following conditions:

       12.2.1  The Disputing Party shall notify the AAA and the other Party in
               writing describing in reasonable detail the nature of the dispute
               (the "DISPUTE NOTICE").  The parties shall each select a neutral
               arbitrator in accordance with the rules of AAA and the two (2)
               arbitrators selected shall select a third neutral arbitrator. 
               The three (3) arbitrators so selected are herein referred to as
               the "PANEL."

       12.2.2  The Panel shall allow reasonable discovery as permitted by the
               Federal Rules of Civil Procedure, to the extent consistent with
               the purpose of the arbitration.  The Panel shall have no power or
               authority to amend or disregard any provision of this Article 12.
               The arbitration hearing shall be commenced promptly and conducted
               expeditiously, with each of ActaMed and SBCL being allocated 
               one-half of the time for the presentation of its case.  Unless
               otherwise agreed to by the parties, an arbitration hearing shall
               be conducted on consecutive days.

                                       -18-
<PAGE>

       12.2.3  Should any arbitrator refuse or be unable to proceed with
               arbitration proceedings as called for by this Section, such
               arbitrator shall be replaced by an arbitrator selected in
               accordance with the rules of the AAA and consistent with this
               Article 12.

       12.2.4  The Panel rendering judgment upon disputes between parties as
               provided in this Article 12 shall, after reaching judgment and
               award, prepare and distribute to the parties a writing describing
               the findings of fact and conclusions of law relevant to such
               judgment and award and containing an opinion setting forth the
               reasons for the giving or denial of any award.  The award of the
               arbitrator shall be final and binding on the parties, and
               judgment thereon may be entered in a court of competent
               jurisdiction.

       12.2.5  Arbitration hearings hereunder shall be held in Washington D.C.
               or another mutually agreeable location.

       12.2.6  The Panel shall be instructed that time is of the essence in the
               arbitration proceeding.  The Panel shall render its judgment or
               award within fifteen (15) days following the conclusion of the
               hearing.  Recognizing the express desire of the parties for an
               expeditious means of dispute resolution, the arbitrator shall
               limit or allow the parties to expand the scope of discovery as
               may be reasonable under the circumstances.

12.3   IMMEDIATE INJUNCTIVE RELIEF.  The nonbreaching party may file a pleading
       with a court seeking immediate injunctive relief in the event the other
       party commits a breach of the confidentiality obligations set forth in
       this Agreement, SBCL violates the limitations imposed by Section 3.2
       hereof, ActaMed violates the limitations imposed by Section 2.2 or 2.3
       hereof, or in the event a party makes a good faith determination that a
       breach of the terms of this Agreement by the other party is such that
       the damages to such party resulting from the breach will be so
       immediate, so large or severe, and so incapable of adequate redress
       after the fact that a temporary restraining order or other immediate
       injunctive relief is a necessary remedy.  If a party files a pleading
       with a court seeking immediate injunctive relief and this pleading is
       challenged by the other party and the injunctive relief sought is not
       awarded in substantial part (or in the event of a temporary restraining
       order is vacated upon challenge by the other party), the party filing
       the pleading seeking immediate injunctive relief shall pay all of the
       costs and attorneys fees of the party successfully challenging the
       pleading.

12.4   JURISDICTION.  ActaMed and SBCL each consent to venue in Philadelphia,
       Pennsylvania and to the nonexclusive jurisdiction of competent
       Pennsylvania state courts or federal courts located in Philadelphia for
       all litigation which may be brought, subject to the requirement for
       arbitration hereunder, with respect to the terms of, and the
       transactions and relationships contemplated by, this Agreement. 

12.5   CONTINUED PERFORMANCE; CONTINUATION OF LICENSES.  Each party agrees to
       continue performing its obligations under this Agreement while any
       dispute is being resolved unless 

                                       -19-
<PAGE>

       and until such obligations are terminated or expire in accordance with 
       the provisions by the termination or expiration of this Agreement not 
       in dispute.  Nothing in this Agreement shall be construed as altering 
       the perpetual and irrevocable nature of the licenses granted by this 
       Agreement or as authorizing any arbitrator or court in any way to 
       enjoin or otherwise interfere with the proper exercise of such 
       licenses by either party hereto.

                              ARTICLE 13 - MISCELLANEOUS

13.1   FURTHER ASSURANCES.  From time to time SBCL and ActaMed and their
       respective officers, employees, contractors, representatives and agents,
       shall confirm the provisions of this Agreement by execution and delivery
       of such assignments, confirmations or other written instruments as may
       be reasonably requested by the other party in order to vest each party
       with the rights mentioned in this Agreement.  ActaMed and SBCL shall
       obtain appropriate assignments, covenants and obligations from its
       officers, employees, representatives, agents and any contractors hired
       to carry out its obligations under the SCAN Agreements prior to their
       performance thereof to ensure SBCL or ActaMed, as the case may be, may
       own the rights specified in this Agreement.

13.2   INTEGRATION.  This License Agreement (including all of the Schedules
       hereto) supersedes all prior agreements and understandings between the
       parties with respect to the subject matter of this License Agreement,
       and is intended by the parties as the complete and exclusive statement
       of their agreement, and supersedes all prior understandings and
       agreements, whether oral or written, between the parties with respect to
       the same subject matter.

13.3   FORCE MAJEURE.  Each party shall be excused from delays in performing or
       from its failure to perform hereunder to the extent that such delays or
       failures result from causes beyond the reasonable control of such party;
       PROVIDED that, in order to be excused from delay or failure to perform,
       such party must act diligently to remedy the cause of such delay or
       failure.

13.4   NO AGENCY.  Each party hereto, is acting solely as an independent
       contractor.  In no way is either party to be construed as the agent or
       to be acting as the agent of the other party in any respect.  Each party
       has the sole obligation to supervise, manage, contract, direct, procure,
       perform, or cause to be performed all work to be carried out by such
       party under any SCAN Agreement.

13.5   NO WAIVER.  No delay or omission by either party to exercise any right 
       arising upon any noncompliance with, or breach of, any covenant, 
       condition or agreement to be performed by the other party shall impair 
       any such right or be construed to be a waiver thereof.  A waiver by 
       either of the parties hereto of any noncompliance with, or breach of, 
       any covenant, condition or agreement to be performed by the other 
       party must be in writing and signed by both parties. No waiver of any 
       right upon any one occurrence of noncompliance or breach

                                -20-

<PAGE>

       shall be construed to be a waiver of any succeeding noncompliance or 
       breach.  Unless stated otherwise, all remedies provided for in this 
       License Agreement shall be cumulative and in addition to and not in 
       lieu of any other remedies available to either party at law, in 
       equity, or otherwise.

13.6   SEVERABILITY.  If any term, covenant, condition or provision of this
       License Agreement or the application thereof to any circumstance shall
       be invalid or unenforceable to any extent, the remaining terms,
       covenants, conditions and provisions of this License Agreement shall not
       be affected thereby and each remaining term, covenant, condition and
       provision of this License Agreement shall be valid and enforceable to
       the fullest extent permitted by law.  If any provision of this License
       Agreement is so broad as to be unenforceable, such provision shall be
       interpreted to be only as broad as is enforceable.

13.7   NOTICES.  If one party is required or desires to give notice to the
       other, such notice shall be deemed given if mailed by U.S. mail, first
       class, postage prepaid, or via a nationally recognized overnight
       carrier, with all freight charges prepaid, and addressed as follows (or
       as subsequently noticed to the other party):

       If to SBCL:            SmithKline Beecham Clinical Laboratories, Inc.
                              1201 S. Collegeville Road 
                              Collegeville, PA 19426 
                              ATTN: [*]

       If to ActaMed:         ActaMed Corporation 
                              7000 Central Parkway Suite 600
                              Atlanta, GA 30328 
                              ATTN: MIKE HOOVER

13.8   GOVERNING LAW; INTERPRETATION.  This License Agreement shall be
       construed, interpreted and enforced under the laws of the Commonwealth
       of Pennsylvania, excluding its provisions regarding conflicts of law. 
       The section and subsection headings used herein are for reference and
       convenience only, and shall not enter into the interpretation hereof.


[*] CONFIDENTIAL TREATMENT REQUESTED

                                       -21-
<PAGE>


       IN WITNESS WHEREOF, the parties have caused this License Agreement to be
executed on the date set forth below.


SMITHKLINE BEECHAM CLINICAL          ACTAMED CORPORATION

LABORATORIES, INC.                                  

BY:  /s/ John B. Okkerse, Jr.          BY:  /s/ Michael K. Hoover
   ---------------------------            -------------------------
NAME:  John B. Okkerse, Jr.            NAME:  Michael K. Hoover
   ---------------------------            -------------------------
TITLE:  President                      TITLE:  President
   ---------------------------            -------------------------
DATE:  12-31-97                        DATE:  12-31-97
   ---------------------------            -------------------------










<PAGE>

                                     SCHEDULE A

                                   SBCL SOFTWARE

- -      SBCL proprietary Software known as [*] (including without limitation
       the [*]) and [*].

- -      Download programs and routines and other SBCL proprietary Software
       reasonably required to perform Information Services as SBCL is
       performing them as of the date of the License Agreement.

- -      Documentation owned by SBCL and related to any of the foregoing.

- -      Specifications owned and possessed by SBCL with respect to the
       foregoing.

- -      Such Specifications for the Software known as [*] and [*] as SBCL
       determines reasonably necessary for the SBCL Software, SCAN Developments
       and ActaLab Software [*] and [*].

- -      Such updates, upgrades, corrections, modifications, and enhancements to
       any of the foregoing created during the term of the Services Agreement.

- -      All patents, patent applications, copyrights, trade secrets, know-how,
       information and other intellectual property rights that are currently
       owned or controlled by SBCL and that are embodied or practiced in the
       foregoing.


[*] CONFIDENTIAL TREATMENT REQUESTED

<PAGE>

 
                                 SCHEDULE B

                     AMENDMENTS TO DEVELOPMENT AGREEMENT
                                          
SBCL and ActaMed hereby agree this    day of December, 1997, to amend their
Development Agreement October 31, 1997, as set forth herein as of the effective
dates set forth herein.

       1.      Effective as of the date of the Development Agreement, Article I
of the Development Agreement is hereby amended to include the following
additional or revised definitions:

               "ActaLab Software" has the meaning ascribed to it by the License
       Agreement.

               "Deliverable" means all Software, Documentation and other
       materials developed by ActaMed under this Agreement and described in a
       Statement of Work.

               "License Agreement" means that certain License Agreement between
       SBCL and ActaMed dated December 22, 1997.

               "SBCL Software" has the meaning ascribed to it by the License
       Agreement.

               "SOW No. 1" shall mean the Statement of Work dated October 31,
       1997.

       2.      The second "Whereas" clause is hereby deleted.

       3.      The fourth "Whereas" clause is hereby revised to delete the words
"to SBCL."

       4.      Section 5.1(a) of the Development Agreement is hereby revised as
of the date of the Development Agreement to read as follows:

                      (a)     The parties hereby acknowledge and agree that:

                              (i)    The Deliverables under SOW No. 1 do not 
       [*] the SBCL Software, but instead [*] which will be used in conjunction
       with and/or will be integrated into ActaMed's ProviderLink software.  
       All Deliverables (including but not limited to, the ActaLab Software) 
       under SOW No. 1, and all intellectual property rights (including but not
       limited to copyrights and all renewals and extensions thereof) in such 
       Deliverables, shall be [*].  Subject to the provisions of Section 
       5(a)(iv) hereof, SBCL hereby grants, transfers and assigns all of its 
       right, title and interest in such Deliverables, including patents, 
       copyrights, trade secrets and other intellectual property developed or 
       acquired in the course of creating such Deliverables, to ActaMed and 
       ActaMed shall have the right to obtain and hold in its own name 
       copyrights, 


[*] CONFIDENTIAL TREATMENT REQUESTED

<PAGE>

       patents, registrations and similar protections which may be available
       with respect to such Deliverables.
       
                              (ii)   The parties contemplate that additional
       SOWs may be entered into from time to time for the purpose of enhancing,
       modifying or upgrading the ActaLab Software (an "ActaLab SOW").  All
       Deliverables under an ActaLab SOW and all intellectual property rights
       (including but not limited to copyrights and all renewals and extensions
       thereof) in such Deliverables, shall be [*].  Subject to the provisions
       of Section 5(a)(iv) hereof, SBCL hereby grants, transfers and assigns all
       of its right, title and interest in such Deliverables, including patents,
       copyrights, trade secrets and other intellectual property developed or 
       acquired in the course of creating such Deliverables, to ActaMed and 
       ActaMed shall have the right to obtain and hold in its own name 
       copyrights, patents, registrations and similar protections which may be
       available with respect to such Deliverables.

                              (iii)  The parties contemplate that additional
       SOWs may be entered into from time to time for the purpose of enhancing,
       modifying or upgrading the SBCL Software (a "SCAN Development SOW"). 
       Ownership of any Deliverables under a SCAN Development SOW, and
       ownership of any intellectual property rights therein (including but not
       limited to copyrights and all renewals and extensions thereof), shall be
       governed in all respects by Article 3 of the License Agreement.  Subject
       to the provisions of Section 5(a)(iv) hereof, ActaMed hereby grants,
       transfers and assigns all of its right, title and interest in such
       Deliverables, including patents, copyrights, trade secrets and other
       intellectual property developed or acquired in the course of creating
       such Deliverables, to SBCL.

                              (iv)   Nothing in this Section 5(a) shall be
       construed to transfer to ActaMed, or otherwise divest SBCL of SBCL's
       ownership of, the SBCL Software and, subject to the licenses granted by
       the License Agreement, SBCL (as between SBCL and ActaMed) shall be the
       sole owner of the patents, copyrights, trade secrets and other
       intellectual property rights therein.  Nothing in this Section 5(a)
       shall be construed to transfer to SBCL, or otherwise divest ActaMed of
       ActaMed's ownership of, any software or work of authorship owned by
       ActaMed as of the effective date of the Development Agreement and,
       subject to the licenses granted by the License Agreement, ActaMed (as
       between SBCL and ActaMed) shall be the sole owner of  any patent,
       copyright, trade secret right or other intellectual property right
       therein.  

                              (v)    Any Statement of Work, by mutual agreement
of the parties, may include limitations and restrictions on ActaMed's use of the
applicable Deliverables in support of laboratory testing services of commercial
laboratories other than SBCL.

       6.      Sections 5.1(d) and (e) and Section 5.2(a) as of the date of this
Amendment are hereby deleted from the Development Agreement.


[*] CONFIDENTIAL TREATMENT REQUESTED

<PAGE>

       7.      In the event of conflict between the Development Agreement and
the License Agreement, the License Agreement shall control.

       9.      Except as expressly set forth herein, the Development Agreement
shall continue in full force and effect as originally executed by the parties.

       10.     Nothing in this Agreement shall be construed to modify or change
in any respect the ownership and use rights with respect to Exclusive
Developments (as defined in the Services Agreement between SBCL and ActaMed
dated the date hereof) pursuant to the License Agreement and Section V of said
Services Agreement.

               In witness whereof, the parties have caused this Amendment to be
signed this        day of December, 1997.


SMITHKLINE BEECHAM CLINICAL          ACTAMED CORPORATION

LABORATORIES, INC.

BY:   /s/                            BY: /s/                          
   ----------------------------         ---------------------------

NAME: John B. Okkersee Jr.           NAME: Michael K. Hoover
     --------------------------           -------------------------


TITLE: President                     TITLE: President
      -------------------------            ------------------------


DATE:                                DATE:                               
     --------------------------           -------------------------


<PAGE>
                          CONFIDENTIAL TREATMENT REQUESTED


                                DEVELOPMENT AGREEMENT


     THIS AGREEMENT is made as of this 31 day of October, 1997, by
and between SmithKline Beecham Clinical Laboratories, Inc., a Delaware
corporation with offices located at 1201 S. Collegeville Road, Collegeville, PA
19426 ("SBCL"), and ActaMed Corporation, a Georgia corporation with offices
located at 7000 Central Parkway, Suite 600, Atlanta, GA  30328 ("ACTAMED").

     WHEREAS, ACTAMED has expertise in software development, installation and
implementation, systems analysis and design, data processing and computer
programming;

     WHEREAS, ACTAMED employs a staff of qualified technical personnel whose
services ACTAMED is willing to provide to SBCL on a temporary or project basis;

     WHEREAS, SBCL desires to have ACTAMED provide certain services and
personnel to SBCL for the project described in the attached Statement of Work;
and

     WHEREAS, the parties desire to agree upon the terms and conditions under
which ACTAMED may provide such services and personnel to SBCL.

     NOW, THEREFORE, in consideration of the foregoing premises and the mutual
covenants and agreements contained herein, the parties hereto agree as follows:

                                      ARTICLE I
                                     DEFINITIONS

     For purposes of this Agreement, the following terms shall have the
following meanings and shall include the plural as well as the singular:

     "Affiliate" means any corporation or other entity which controls, is
controlled by, or is under common control with SBCL, and any joint venture or
partnership in which SBCL is a partner or joint venturer, or any other entity in
which SBCL has an interest and to which it supplies or receives information
processing services.  A corporation or other entity shall be deemed to control
another corporation or entity if it owns, directly or indirectly, more than
fifty percent (50%) of the voting shares or other interest, or has the power to
elect more than half the directors, of such other corporation or entity.

     "Confidential Information" means any and all proprietary information
disclosed or made available by a party hereto to the other party in the course
of performing hereunder, whether in written, oral, magnetic, photographic,
optical or other form and whether now existing or hereafter created, including,
without limitation, all trade secrets, know-how, information systems,
technology, data, computer programs, processes, methods, operational procedures,
plans, strategies or results, and other information of a similar nature that is
not generally disclosed by such party to the public.

<PAGE>

Confidential Information shall not include any information which (a) is proven
by written evidence to have been in a receiving party's possession prior to
disclosure by the other party; (b) is received from a third party having the
right to disclose such information; (c) is or hereafter becomes public knowledge
through no act or fault of a receiving party; or (d) is proven by written
evidence to have been independently developed by a receiving party without
access to the Confidential Information of the other party.

     "Deliverables" means all Software, Documentation and other materials
developed for or delivered to SBCL by ACTAMED under this Agreement and described
in a Statement of Work.

     "Derivative Work" means a work that is based upon one or more preexisting
works, such as a revision, modification, translation, abridgment, condensation,
expansion, or any other form in which such preexisting works may be recast,
transformed, translated or adapted, and that, if prepared without authorization
of the owner of the copyright in such preexisting work, would constitute a
copyright infringement.

     "Documentation" means manuals (e.g., user, utility reference and language
reference) and other written materials that relate to particular Software,
including materials useful for the operation of the Software by a user, and
information (e.g., data flows, data structures, control logic, flow diagrams,
and principles of operation) useful for design, modification and maintenance of
the source code by a programmer.  Documentation also shall include any
Maintenance Modifications or Enhancements thereto created by ACTAMED from time
to time, and such additional materials as may be described in a Statement of
Work.

     "Enhancements" means changes or additions, other than Maintenance
Modifications, to Software and related Documentation, including all new
releases, that improve functions, add new functions, or significantly improve
performance by changes in system design or coding.

     "Error" means any error, problem, or defect resulting from (a) an incorrect
functioning of Software, or (b) an incorrect or incomplete statement of diagram
in Documentation, if such an error, problem or defect renders the Software
inoperable, causes the Software to fail to meet the Specifications thereof,
causes the Documentation to be inaccurate or incomplete in any material respect,
causes incorrect results or causes incorrect functions to occur when any such
materials are used.

     "Maintenance Modifications" means any modifications or revisions, other
than Enhancements, to Software or Documentation that correct Errors, support new
releases of the operating systems with which the Software is designed to
operate, support new input/output devices or provide other incidental updates
and corrections.

     "Services" means the software development, design, analysis, data
processing, computer programming, consulting, training and/or such other
services and duties to be provided to SBCL under this Agreement and described in
a Statement of Work.


                                         -2-
<PAGE>

     "Software" means computer programming code, including updates and revisions
thereto, which conform to the Specifications and includes both object code
(i.e., machine-readable) and source code (i.e., human-readable), and associated
procedural code, all as more fully described in a Statement of Work.  Software
also shall include any Maintenance Modifications and Enhancements thereto
created by ACTAMED from time to time.

     "Specifications" means the description of the design, operating procedures,
performance, functions and other requirements for the Software set forth in a
Statement of Work.

     "Statement of Work" or "SOW" means a written instrument in substantially
the form of Exhibit A attached hereto which is signed on behalf of both parties
by their authorized representatives.

                                      ARTICLE II
                                       SERVICES

     2.1   SERVICES.  SBCL hereby retains ACTAMED to provide the Services and
Deliverables, and ACTAMED hereby agrees to provide the Services and
Deliverables, in the manner described in this Agreement and in Statements of
Work issued from time to time hereunder.  The Services and Deliverables shall
conform to the Specifications set forth in the applicable SOW.

     2.2   SCHEDULE; LOCATION.  SBCL, at its own expense, shall furnish to
ACTAMED access to appropriate computer personnel, as well as all relevant
Documentation, Specifications and source code in its possession and necessary
for ACTAMED to provide the Services and Deliverables.  ACTAMED will provide the
Services and deliver the Deliverables on or before the dates (the "Schedule")
and at the location(s) set forth in a SOW.  Delivery of any intermediate
Deliverables, or status reports thereon, also shall be on the dates specified in
the Schedule.  No variation or modification shall be made to the Schedule
without the prior written consent of SBCL and ACTAMED.

     2.3   Personnel.

           (a)   ACTAMED shall provide fully trained, competent and skilled
personnel for performance of the Services.

           (b)   Promptly upon execution of this Agreement, each party shall
notify the other party of the name, business address and telephone number of its
Contract Administrator.  The Contract Administrators of each party shall be
responsible for arranging all meetings, visits and consultations between the
parties that are of a nontechnical nature.  The Contract Administrator also
shall be responsible for receiving all notices under this Agreement and for all
administrative matters such as invoices, payments and amendments.

           (c)   Each SOW shall state the name, business address and telephone
number of the Project Managers for each party.  The Project Managers of each
party designated for a particular


                                         -3-
<PAGE>

SOW shall, with respect to such SOW, be responsible for technical and
performance matters, and the delivery, receipt and acceptance of the
Deliverables and technical information.

     2.4   PROGRESS REPORTS AND MEETINGS.  At either party's reasonable written
request from time to time during the performance of this Agreement, but at least
once each month, and at no additional cost, the Project Managers and any other
personnel either party may designate shall meet to review the progress of the
project described in a particular SOW.  At each such meeting, ACTAMED shall
provide SBCL with a written status report, which shall include but not be
limited to, any problem that, in ACTAMED's reasonable judgment, might cause any
increase in the budgeted costs for such project or adversely affect ACTAMED's
ability to meet the Schedule or the Specifications.

     2.5   Change Order Procedures.

           (a)   REQUIREMENT OF CHANGE ORDERS.  All changes, modifications and
additions to the obligations of either party under this Agreement or any SOW
requires a written change order (a "Change Order").  Either party may initiate a
Change Order by submitting a written request for a Change Order to the other
party along with an explanation of reasons as to why such a modification is
desirable or necessary.

           (b)   CHANGE ORDER CONTENTS.  All Change Orders must contain:

                 (i)     a description of any additional work to be performed
and/or changes to the performance required of either party, including the
estimated number and skill level of personnel necessary to make such changes
and/or additions and the availability of such personnel over the ensuing period;

                 (ii)    a statement of the impact of the work or changes on the
Services, Deliverables, Schedule, costs or other requirements of this Agreement
or a SOW;

                 (iii)   acceptance test procedures for such work, if
applicable; and

                 (iv)    signatures of duly authorized individuals of each
party.

           (c)   ACCEPTANCE OF CHANGE ORDER.  Within ten (10) days of the
submission of a Change Order request from one party to the other, the receiving
party shall notify the other party of its acceptance or rejection.  SBCL may, in
its sole discretion, reject any Change Order requested by ACTAMED.  ACTAMED may
not decline to accept any Change Order requested by SBCL that, together with any
prior accepted Change Orders, do not substantially affect the nature of the
Deliverables, their performance or functionality, and does not change the
Schedule by more than two man day or dollar amounts by more than 2%.

     2.6   CONTROLLING DOCUMENT.  In the event any provision contained in this
Agreement conflicts with any part of a SOW, the provision set forth in the SOW
shall take precedence.


                                         -4-
<PAGE>

                                     ARTICLE III
                          COMPENSATION; PAYMENT AND EXPENSES

     3.1   COMPENSATION.  Amounts and method of payment for all Services and
Deliverables to be provided under this Agreement shall be set forth in each SOW.

     3.2   PAYMENT.  Unless otherwise specified in the applicable SOW, (a)
ACTAMED shall submit invoices to SBCL for payment for Services and Deliverables
within thirty (30) calendar days after the close of each month during which
Services were rendered and/or Deliverables were delivered to SBCL; and (b) all
undisputed invoices shall be due and payable within [*] days of SBCL's
receipt of such invoice and acceptance of the Services and/or Deliverables.  All
invoices shall specifically refer to the applicable SOW, indicate the period of
performance and provide reasonable detail with respect to the Services and
Deliverables to which they relate, including, if applicable, time and labor
spent in providing the Services, cost of materials and travel and living
expenses.  Supporting documentation called for by SBCL's standard reimbursement
policies shall accompany any such invoice.  Payment in accordance with these
terms shall represent full and complete compensation for all Services and
Deliverables provided pursuant hereto, and for any inventions, improvements,
copyrights, patent rights and other intellectual property rights assigned, as
more fully set forth below.

     3.3   RECORDS AND AUDITS.  ACTAMED shall maintain complete and accurate 
accounting records in accordance with sound accounting practices to 
substantiate ACTAMED's charges and shall preserve such records for a period 
of at least [*] after completion of the pertinent work.  SBCL shall have 
access to such records for purposes of audit, either through its own 
representatives or through an accounting firm selected and paid by SBCL.  Any 
such review of ACTAMED's records shall be conducted at reasonable times 
during business hours, and no more than twice annually.

     3.4   TAXES.  ACTAMED assumes all responsibility and liability for the
payment of any federal, state, or local income taxes due on money received from
SBCL hereunder, and shall be responsible for all employment taxes and
withholding with respect to its employees and contractors.

     3.5   EXPENSES.  Except as otherwise agreed by SBCL in writing, ACTAMED
shall bear all of its own expenses arising from performance of its obligations
under this Agreement and each SOW, including, without limitation, expenses for
transportation, living facilities, work spaces, utilities, management, clerical
and reproduction services, supplies, and the like.

                                      ARTICLE IV
                         DELIVERY; ACCEPTANCE AND MAINTENANCE

     4.1   DELIVERY.  ACTAMED shall deliver all Deliverables for testing and
acceptance in the manner set forth in the applicable SOW.


[*] Confidential Treatment Requested

                                         -5-
<PAGE>

     4.2   TESTING.

           (a)   Upon receipt of the Deliverables, SBCL shall test the
Deliverables to determine whether they meet the Specifications and any other
requirements set forth in the SOW.

           (b)   Unless otherwise specified in the applicable SOW, such testing
shall be conducted in accordance with the following testing procedures and
criteria:

                 (i)     SBCL will notify ACTAMED, in writing, that it is
accepting or rejecting the Deliverables within thirty (30) days after receipt.
Any notice of rejection shall set forth the grounds for rejection.  ACTAMED
shall use its best efforts to remedy any failures of the Deliverables to meet
the Specifications, and shall deliver corrected Deliverables to SBCL as soon as
possible.

                 (ii)    Upon receipt of corrected Deliverables, SBCL shall 
have [*] within which to test them and inform ACTAMED of its acceptance or 
rejection.

     This procedure may be repeated any number of times; PROVIDED, HOWEVER, that
if SBCL detects errors in the Deliverables or the Deliverables fail to meet the
Specifications, SBCL may withhold payment under the applicable SOW until the
errors in the Deliverables are corrected or the Deliverables meet the
Specifications.

           (c)   If SBCL detects errors in the Deliverables or the Deliverables
fail to meet the Specifications after it has tested them twice, SBCL shall
thereafter have, until it accepts the Deliverables, the right to terminate this
Agreement or the applicable SOW upon written notice to ACTAMED.  Upon such
termination, ACTAMED shall retain all payments SBCL has made to it up to the
date of termination, SBCL shall retain all Deliverables received by such date,
and SBCL shall have no further obligations to pay any amounts to ACTAMED under
this Agreement.

     4.3   ACCEPTANCE.  If SBCL does not detect any Errors or any failure of
the Deliverables to meet the Specifications after a performance of the tests
described in Section 4.2, SBCL shall accept the Deliverables by issuing a
written confirmation of acceptance to ACTAMED, which shall be effective as of
the date of successful completion of the tests.

                                      ARTICLE V
                            OWNERSHIP AND CONFIDENTIALITY

     5.1   OWNERSHIP OF WORK PRODUCT BY SBCL.

           (a)   SBCL and ACTAMED agree that any Deliverables prepared under 
this Agreement, including modifications to software owned by ACTAMED, and 
ownership of all intellectual property rights, including but not limited to 
copyrights and all renewals and extensions thereof, in such works shall [*].  
SBCL and ACTAMED agree to and hereby grant, transfer and assign such right, 
title and interest in the Deliverables, including patents, copyrights and 
trade secrets for purposes of, and to the extent necessary and


[*] Confidential Treatment Requested

                                         -6-
<PAGE>

consistent with this Section 5.1(a).  From time to time SBCL and ACTAMED, and
their respective officers, employees, contractors, representatives and agents,
shall confirm the foregoing assignment by execution and delivery of such
assignments, confirmations or other written instruments as may be reasonably
requested by the other party in order to vest each party with the rights
mentioned in this Section 5.1(a).  ACTAMED shall obtain appropriate assignments,
covenants and obligations from its officers, employees, representatives, agents
and any contractors hired to carry out its obligations under this Agreement
prior to their performance under any SOW to ensure SBCL and ACTAMED may own the
rights specified in this Section 5.1(a).

           (b)   ACTAMED agrees that it shall not, directly or indirectly,
produce, develop or participate in the production or development of any work,
materials documentation or software similar to any Deliverable or Specification,
or utilize any techniques, methods or know-how relating to the aforementioned
items, for the period beginning as of the date hereof and ending on the date on
which the last phase any Deliverable was scheduled under an SOW to be delivered
to SBCL for testing and acceptance, or the date the last phase any such
Deliverable was actually delivered to SBCL for testing and acceptance, whichever
is later; PROVIDED, HOWEVER, nothing contained in this Section 5.1(b) shall
prohibit ACTAMED from purchasing any work, documentation or software similar in
function or purpose to any of the Deliverables or Specifications that is
produced or developed independently by a third party without access, reference
or knowledge of the Deliverables, Specifications or any other SBCL Confidential
Information.  SBCL reserves the right to audit and inspect any work, materials,
documentation or software developed or purchased by ACTAMED at any time that is
similar to any Deliverable or Specification for purposes of ensuring compliance
with the confidentiality provisions of this Agreement.

           (c)   ACTAMED agrees that if, during [*] beginning with the date on 
which the last phase of any Deliverable was scheduled under SOW No. 1 to be 
delivered to SBCL for testing and acceptance, or the date the last phase of 
any such Deliverable was actually delivered to SBCL for testing and 
acceptance, whichever is later, ACTAMED, directly or indirectly, produces, 
develops or participates in the production or development of any laboratory 
test ordering and result reporting software, ACTAMED will not permit any 
software engineer, designer or similar person (whether an employee or 
independent contractor) that participated in the production or development of 
the Services or Deliverables or who otherwise had access to SBCL Confidential 
Information to participate, directly or indirectly, in such production or 
development.

           (d)   Notwithstanding anything to the contrary in this Agreement,
both SBCL and ACTAMED agree not to exercise or to authorize any other party to
exercise any of SBCL's or ACTAMED's ownership rights or privileges with respect
to any of the Deliverables, including without limitation, the right to use,
license, sell, deliver, transfer or incorporate such Deliverables into any other
product for any reason without the prior written consent of the other party.
Neither party shall have any obligation to give their consent for purposes of
this Section 5.1(d).

           (e)   SBCL and ACTAMED agree not to reveal any Deliverable, in whole
or in part, to anyone outside of ACTAMED or SBCL without the prior written
consent of the other party, or to any officer, employee, contractor,
representative or agent of ACTAMED or SBCL who is not


[*] Confidential Treatment Requested

                                         -7-
<PAGE>

covered by the restrictions on confidentiality and use contained herein.
ACTAMED further agrees not to use, sell, deliver, transfer or reveal any
Specification, in whole or in part, to anyone outside of ACTAMED without SBCL's
prior written consent, or to any officer, employee, contractor, representative
or agent of ACTAMED who is not covered by the restrictions on confidentiality
and use contained herein.

     5.2   PREEXISTING WORKS.

           (a)   In the event that any Deliverable or part thereof constitutes
a Derivative Work of any preexisting works owned by either party, or in the
event either party requires the other party's preexisting works in order to
perform under this Agreement, each party hereby grants to the other party and
its Affiliates a non-exclusive, worldwide, royalty-free right and license to
use, execute, reproduce, display, perform and distribute internally such
preexisting works for the sole and limited purpose of developing the
Deliverables and performing the Services in accordance with this Agreement.  All
rights not granted herein are specifically reserved.  For purposes of this
Section 5.2, "preexisting works" shall include, but not be limited to, the
Specifications (including the specifications for the [*] and [*] 
systems) and "SBCL SCAN" software, in the case of SBCL, and the "Provider Link"
software, in the case of ACTAMED.

           (b)   In the event that any Deliverable or part thereof constitutes
a Derivative Work of preexisting works not owned by SBCL or ACTAMED, SBCL or
ACTAMED, as the case may be, shall ensure that the other party and its
Affiliates have a non-exclusive, worldwide, royalty-free right and license to
use, execute, reproduce, display, perform and distribute internally such
preexisting works for the sole and limited purpose of developing the
Deliverables and performing the Services in accordance with this Agreement.
SBCL and ACTAMED each agree to notify the other party in writing of any
pre-existing work, or portion thereof, which either or them does not own prior
to the incorporation of such pre-existing work in the Deliverables.  Such notice
shall identify: (i) the pre-existing work which is not owned, (ii) the owner of
such pre-existing work, (iii) SBCL's or ACTAMED's, as the case may be, right to
use such pre-existing work, (iv) the nature of SBCL's or ACTAMED's right to
grant to the other party the license contemplated herein, and (v) it shall grant
the other party the aforesaid rights and license.

     5.3   OBLIGATION OF CONFIDENTIALITY.

           (a)   SBCL and ACTAMED each acknowledge and agree that during the
term of this Agreement, they shall have access to certain Confidential
Information of the other party.  SBCL and ACTAMED each agree to keep such
Confidential Information in strict confidence and shall not disclose it to any
person, firm, partnership or corporation other than to its officers, employees,
contractors, representatives and agents who have a need to know such information
in order to perform hereunder or under a SOW, nor use the same for any purpose
other than performance hereunder or under a SOW.  SBCL and ACTAMED,
respectively, shall advise all officers, employees, contractors, representatives
and agents with access to the other party's Confidential Information of the
confidentiality obligations with respect thereto under this Agreement.
Notwithstanding the foregoing, SBCL and ACTAMED shall be and remain liable and
responsible


[*] Confidential Treatment Requested

                                         -8-
<PAGE>

for the confidentiality obligations of their respective officers, employees,
contractors, representatives and agents.  In addition to the foregoing, SBCL and
ACTAMED shall protect and safeguard the other party's Confidential Information
by using the same degree of care, but no less than a reasonable degree of care
to prevent the unauthorized use, dissemination or publication of such
Confidential Information as they each use to protect their own confidential or
proprietary information of a like nature.  Upon request by the other party, SBCL
and ACTAMED shall require any or all of its officers, employees, contractors,
representatives and agents to sign a confidentiality agreement prepared by the
other party and approved by SBCL or ACTAMED, as the case may be, which affirms
such officers, employees, contractors, representatives or agents obligations in
regards to the Confidential Information.

           (b)   SBCL and ACTAMED each acknowledge and agree that the terms and
conditions with respect to confidentiality are reasonable and necessary for the
protection of each of the party's Confidential Information and to prevent damage
or loss to the other party.  SBCL and ACTAMED further agree that any breach or
threatened breach of such provisions will cause the other party irreparable harm
for which there is no adequate remedy at law.  Therefore, SBCL and ACTAMED each
agree that the nondisclosing party shall be entitled, in addition to any other
remedies available, to injunctive or other equitable relief to require specific
performance or to prevent a breach of the foregoing confidentiality provisions.

           (c)   Upon the breach of any provision, early termination or
completion of this Agreement or any SOW, SBCL and ACTAMED each agree to cease
all use and make no further use of the Confidential Information disclosed to it
by the other party and shall, upon the written request of the other party,
promptly return all such Confidential Information, including any copies used or
distributed to any of its officers, employees, contractors, representatives and
agents, and retain no copies.

           (d)   The confidentiality obligations of this Section 5.3 shall
survive termination of this Agreement.

                                      ARTICLE VI
                            REPRESENTATIONS AND WARRANTIES

     6.1   WARRANTY OF TITLE AND NONINFRINGEMENT.

           (a)   ACTAMED represents and warrants to SBCL that:

                 (i)     unless ACTAMED provides SBCL with advance written
notice to the contrary in accordance with Section 5.2(b), ACTAMED is and will be
the sole author of all works used by ACTAMED in preparing any and all
Deliverables;

                 (ii)    ACTAMED shall require all officers, employees,
contractors, representatives and agents who provide Services or Deliverables
hereunder to assign to ACTAMED all intellectual property rights created or
arising in the performance of the Services and Deliverables for purposes
consistent with Article V;


                                         -9-
<PAGE>

                 (iii)   ACTAMED has and will have full and sufficient right to
assign or grant the rights granted pursuant to this Agreement, free and clear of
any liens, claims or encumbrances; and

                 (iv)    none of the Deliverables infringe any patents,
copyrights, trademarks, or other intellectual property rights (including trade
secrets), privacy or similar rights of any third party, nor has any claim of
such infringement been threatened or asserted.

           (b)   SBCL represents and warrants to ACTAMED that:

                 (i)     SBCL has and will have full and sufficient right to
assign or grant the rights granted pursuant to this Agreement, free and clear of
any liens, claims or encumbrances; and

                 (ii)    none of the Specifications, software and any other
materials provided to ActaMed by SBCL hereunder infringe any patents,
copyrights, trademarks, or other intellectual property rights (including trade
secrets), privacy or similar rights of any third party, nor has any claim of
such infringement been threatened or asserted.

     6.2   WARRANTIES OF CONFORMITY, PERFORMANCE AND COMPLIANCE.  ACTAMED
represents and warrants to SBCL that:

           (a)   all Services and Deliverables shall be performed or provided
in a workmanlike manner and with professional diligence and skill;

           (b)   no portion of the Software contains any unauthorized code such
as a virus, Trojan horse, worm or other software routine or hardware component
designed to permit unauthorized access to disable, erase or otherwise harm the
Software, hardware, or data automatically, with the passage of time or under the
control of a person other than SBCL; and

           (c)   the Software includes acceptable Specifications so that any or
all such Software and any related hardware will not abruptly end or provide
invalid or incorrect results during the operation of SBCL's business due to
issues related to Year 2000 compliance.  "Year 2000 compliance" requires that
the Specifications of the Software and related hardware include, but not be
limited to: date data century recognition, calculations that accommodate same
century and multi-century formulas and date values, and date data interface
values that reflect the century.  The Software and related hardware shall be
used by SBCL prior to, during and after the calendar year 2000.  The
Specifications of the Software and related hardware to ensure Year 2000
compliance shall be supplied by ACTAMED at no additional cost to SBCL.

     6.3   AVOIDANCE OF INFRINGEMENT.  In performing Services under this
Agreement, ACTAMED agrees to avoid designing or developing any items that
infringe any patents, copyrights or other intellectual property rights of any
third party.  If SBCL or ACTAMED becomes aware of any such possible infringement
in the course of performing work under any SOW issued hereunder, SBCL or
ACTAMED, as the case may be, shall immediately so notify the other party in
writing.


                                         -10-
<PAGE>

     6.4   INDEMNIFICATION.

           (a)   SBCL and ACTAMED, respectively, shall indemnify and hold the
other party harmless from and against all loss, liability, costs, charges,
claims or damages to any persons or property, arising out of this Agreement, a
SOW or the provision of the Services or Deliverables where caused by its own
fault or negligence, or the fault or negligence of its officers, employees,
contractors, representatives or agents.  SBCL and ACTAMED also shall indemnify
and hold the other party harmless from and against all loss, liability, costs,
charges, claims or damages which may arise as a consequence of or grow out of
any injury, illness or death of its officers, employees, contractors,
representatives or agents who are engaged in the performance of the Services
under this Agreement or a SOW.

           (b)   ACTAMED shall defend or settle, at its own expense, any and
all suits, actions, proceedings or claims against SBCL charging that any part of
the Services infringes any patent, trademark, trade secret, copyright or other
intellectual property right of any person or entity.  SBCL and ACTAMED shall
defend or settle, each at its own expense, any and all suits, actions,
proceedings or claims against the other party charging that the use, copying,
modification, disclosure or distribution of any part of the Deliverables or
Documentation provided by SBCL or ACTAMED, as the case may be, infringes any
patent, trademark, trade secret, copyright or other intellectual property right
of any person or entity not a party hereto.  Each party will pay actual costs of
the other party, including all legal fees and any damages awarded in any such
suit or proceeding, and will indemnify and hold that other party harmless from
all other liability incurred in connection with such action.

           (c)   SBCL and ACTAMED each agree to (i) promptly notify the other
party in writing of any claim for which it is seeking indemnification; (ii) at
the other party's request and expense, give assistance reasonably required for
the defense of any such claim; and (iii) give the other party control of the
defense and/or settlement of such claim; PROVIDED, HOWEVER, that the other party
may participate in such defense and/or settlement at its option and expense.

           (d)   If any part of the Services or Deliverables is or is likely to
become the subject of such a suit, action or claim, at no expense to the other
party, SBCL or ACTAMED may: (i) obtain sufficient rights to allow the other
party to use the Services or Deliverables as contemplated hereunder; or (ii)
substitute non-infringing services or deliverables acceptable to the other party
and substantially similar to the Services and Deliverables described in the SOW.
Any such replacement services and deliverables shall be subject to all of the
terms and conditions of this Agreement, including without limitation, the
foregoing indemnification provisions.

     6.5   SURVIVAL.  The provisions of this Section shall survive the
termination of this Agreement.


                                         -11-
<PAGE>

                                     ARTICLE VII
                                 TERM AND TERMINATION

     7.1   TERM.  This Agreement shall commence on the date hereof and shall 
remain in force for a period of [*] unless sooner terminated as provided 
herein; PROVIDED, HOWEVER, this Agreement shall remain in effect with respect 
to any Statements of Work already issued hereunder at the time of such 
termination until such Statements of Work are themselves terminated and/or 
performance thereunder is completed.

     7.2   TERMINATION OF SOWS.  SBCL may terminate any or all SOWs
outstanding, or any portion thereof, upon fifteen (15) business days' written
notice in the event that SBCL reasonably determines that ActaMed has failed to
meet any of the milestone dates for completing a phase of work, as set forth in
the project plan for the applicable SOW; provided however, that SBCL
acknowledges that ActaMed's timely performance may be dependent upon SBCL's
timely performance, and therefore SBCL may not so terminate if ActaMed's failure
to meet a milestone date is (i) the result of SBCL's failure to timely perform,
or (ii) because the parties are still engaged in the testing and acceptance
process for that milestone.  Upon receipt of notice of such termination, ACTAMED
shall inform SBCL of the extent to which performance has been completed through
such date, and collect and deliver to SBCL whatever work product then exists in
the manner prescribed by SBCL.  Subject to Section 4.2(c), ACTAMED shall be paid
for all work performed and accepted through the date of termination, provided
that such payment shall not be greater than the payment that would have become
due if the work had been completed.  ACTAMED may not terminate any SOW once
ACTAMED has entered into such SOW.

     7.3   TERMINATION OF AGREEMENT.  SBCL or ACTAMED may terminate this 
Agreement for cause, as provided below, upon [*] prior written notice.  SBCL 
and ACTAMED may terminate this Agreement or any SOW at any time upon mutually 
written agreement.  This Agreement shall continue to remain in effect with 
respect to any SOW already issued hereunder until such SOW is itself 
terminated and/or performance thereunder is completed.

     7.4   TERMINATION IN THE EVENT OF BREACH.  In the event of any material 
breach of this Agreement or a SOW by either party, the other party may 
terminate this Agreement or the applicable SOW without waiving any remedies 
or rights available to such other party at law or in equity.  Such 
termination shall be in writing upon at least [*] prior written notice to the 
party in breach specifying the nature of the breach.  The party in breach 
shall have the opportunity to cure such breach during such [*] period.  If 
the breach has been cured by the end of such period, this Agreement and the 
applicable SOW will not terminate.

     7.5   INSOLVENCY.  Either party may immediately terminate this Agreement
if the other party is declared insolvent or bankrupt; the property of the other
party  is assigned for the benefit of creditors, levied upon under execution, or
seized by virtue of any writ of any court of law; a petition for declaration of
bankruptcy or reorganization is filed against the other party in any court and
not dismissed in ninety (90) days; or a trustee or receiver is appointed for the
other party.  In the event of any such insolvency or bankruptcy, all licenses
granted hereunder shall be considered licenses to


[*] Confidential Treatment Requested

                                         -12-
<PAGE>

intellectual property, and SBCL shall be entitled to retain the licenses granted
herein, subject to ACTAMED's right to terminate this Agreement for reasons other
than bankruptcy or insolvency as expressly provided in this Agreement.  In the
event that a court or other legal or administrative tribunal, directly or
through an appointed master, trustee or receiver, assumes partial or complete
control over the assets of a party to this Agreement based on the insolvency or
bankruptcy of such party, the bankrupt or insolvent party shall promptly notify
the court or other tribunal of the confidentiality obligations under this
Agreement, and that Confidential Information received from the other party under
this Agreement remains the property of the other party.  In addition, the
bankrupt or insolvent party shall, to the extent permitted by law, take all
steps necessary or desirable to maintain the confidentiality of the other
party's Confidential Information and to insure that the court, other tribunal or
appointee maintains such information in confidence in accordance with the terms
of this Agreement.

     7.6   CONSEQUENCES OF TERMINATION.  Upon termination of this Agreement,
ACTAMED shall:

           (a)   immediately cease work as provided in the notice of
termination, and shall cease to represent itself as providing services to SBCL;
and

           (b)   deliver to SBCL (i) a report describing the current state of
the Services and Deliverables to be provided by ACTAMED under this Agreement and
any applicable SOWs at the date of termination; (ii) all SBCL Confidential
Information in its possession; and (iii) all work product, Software, materials
and Documentation related to the Services and Deliverables in whatever state of
development they may exist on the date of termination.

                                     ARTICLE VIII
                                    MISCELLANEOUS

     8.1   FORCE MAJEURE.  Each party shall be excused from delays in
performing or from its failure to perform hereunder to the extent that such
delays or failures result from causes beyond the reasonable control of such
party; PROVIDED that, in order to be excused from delay or failure to perform,
such party must act diligently to remedy the cause of such delay or failure.

     8.2   NO AGENCY.  ACTAMED, in rendering performance under this Agreement
and any SOW, is acting solely as an independent contractor.  SBCL does not
undertake by this Agreement or otherwise to perform any obligation of ACTAMED,
whether by regulation or contract.  In no way is ACTAMED to be construed as the
agent or to be acting as the agent of SBCL in any respect.  ACTAMED has the sole
obligation to supervise, manage, contract, direct, procure, perform, or cause to
be performed all work to be carried out by ACTAMED hereunder.

     8.3   NO WAIVER.  No delay or omission by either party to exercise any
right arising upon any noncompliance with, or breach of, any covenant, condition
or agreement to be performed by the other party shall impair any such right or
be construed to be a waiver thereof.  A waiver by either of the parties hereto
of any noncompliance with, or breach of, any covenant, condition or agreement to
be performed by the other party must be in writing and signed by both parties.
No waiver of any


                                         -13-
<PAGE>

right upon any one occurrence of noncompliance or breach shall be construed to
be a waiver of any succeeding noncompliance or breach.  Unless stated otherwise,
all remedies provided for in this Agreement shall be cumulative and in addition
to and not in lieu of any other remedies available to either party at law, in
equity, or otherwise.

     8.4   SEVERABILITY.  If any term, covenant, condition or provision of this
Agreement or the application thereof to any circumstance shall be invalid or
unenforceable to any extent, the remaining terms, covenants, conditions and
provisions of this Agreement shall not be affected thereby and each remaining
term, covenant, condition and provision of this Agreement shall be valid and
enforceable to the fullest extent permitted by law.  If any provision of this
Agreement is so broad as to be unenforceable, such provision shall be
interpreted to be only as broad as is enforceable.

     8.5   NOTICES.  If one party is required or desires to give notice to the
other, such notice shall be deemed given if mailed by U.S.  mail, first class,
postage prepaid, or via a nationally recognized overnight carrier, with all
freight charges prepaid, and addressed as follows (or as subsequently noticed to
the other party):

If to SBCL:

SmithKline Beecham Clinical Laboratories, Inc.
1201 S. Collegeville Road
Collegeville, PA  19426
ATTN: [*]
      ----------------------------

If to ACTAMED:

ActaMed Corporation
7000 Central Parkway
Suite 600
Atlanta, GA  30328
ATTN: Mike Hoover
      ----------------------------

     8.6   ASSIGNMENT.  SBCL may assign all of its rights and obligations under
this Agreement, SOWs or any license granted hereunder to any Affiliate, or to
any corporation or other entity pursuant to a merger, consolidation, or other
reorganization.  SBCL agrees to notify ACTAMED of any such assignment, in
writing, specifying the name and address of the other entity.  ACTAMED may not,
without the prior written consent of SBCL, assign or transfer this Agreement or
any right or obligation hereunder, and any attempt to do so in contravention of
this Section 8.6 shall be void and of no force and effect.

     8.7   GOVERNING LAW; INTERPRETATION.  This Agreement and all SOWs shall be
construed, interpreted and enforced under the laws of the Commonwealth of
Pennsylvania, excluding its provisions regarding conflicts of law.  The section
and subsection headings used herein are for reference and convenience only, and
shall not enter into the interpretation hereof.


[*] Confidential Treatment Requested

                                         -14-
<PAGE>

     8.8   ENTIRE AGREEMENT.  This Agreement, the SOWs issued from time to time
hereunder and the schedules and exhibits attached hereto or thereto, constitute
the entire agreement concerning the subject matter covered herein and supersede
all prior oral or written agreements, understandings and promises relating
thereto.  This Agreement may not be modified or amended except by an instrument
in writing declared to be an amendment hereto and executed by both parties.
This Agreement may be executed in several counterparts, all of which taken
together shall constitute one single agreement between the parties.

     IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed in the manner appropriate to each as of the day and year first above
written.

ACTAMED CORPORATION                SMITHKLINE BEECHAM CLINICAL
                                   LABORATORIES, INC.


By: /s/                            By: /s/
    ------------------------           --------------------------------
      Mike Hoover                        Rich Davis
      President                          Vice President
                                         Information Resources


Dated:   10/31/97                  Dated:   10/30/97
       ---------------------              -----------------------------




                                         -15-
<PAGE>

                                      EXHIBIT A

                                  STATEMENT OF WORK

     This is a Statement of Work entered into on this 31st day of October, 1997,
between SmithKline Beecham Clinical Laboratories, Inc., a Delaware corporation
with offices located at 1201 S. Collegeville Road, Collegeville, PA  19426
("SBCL"), and ActaMed Corporation, a Georgia corporation with offices located at
7000 Central Parkway, Suite 600, Atlanta, GA  30328 ("ACTAMED"), under the
Development Agreement, dated as of October 31, 1997.

1.   PROJECT MANAGERS:

     for SB:             [*]
                         1201 So. Collegeville Rd.
                         Collegeville, PA 19426
                         VOICE:  [*]
                         FAX:    [*]
                         E-MAIL:  [*]

     for ACTAMED:        [*]
                         7000 Central Parkway
                         Suite 600
                         Atlanta, Georgia 30328
                         VOICE:  [*]
                         FAX:    [*]
                         E-MAIL:  [*]

2.   GENERAL DESCRIPTION OF PROJECT:

     ACTAMED will "port" the SBCL Scan system to its ActaLink architecture,
     substantially re-engineering the system by re-writing most if not all of
     the source code, thereby creating a new product, "ACTALAB," which
     incorporates all of the requirements and functionality [*] of SBCL SCAN as
     depicted by the actual SBCL SCAN system and its associated documentation.

     This re-engineering will also incorporate ActaLink architecture,
     functionality and components as appropriate to create a fully integrated
     product that benefits from the functionality of the ActaLink product.  This
     will include functionality to perform an eligibility check at the time of
     order entry and to associate the resulting billing and eligibility
     information with each order for all payers available to ACTAMED.

     A complete description and overview of the project is provided as
     Attachment 1 to this Statement of Work, which includes:


[*] Confidential Treatment Requested

                                         -16-
<PAGE>

     -     Description of Specifications
     -     Description of Deliverables
     -     Description and Location of Services
     -     Project Schedule and Resources
     -     Testing procedures and Acceptance Criteria

3.   PAYMENT SCHEDULE

     For the Services and Deliverables to be provided hereunder, SBCL will pay
     ACTAMED the aggregate sum of [*] in accordance with the following schedule.
     The payment for each Deliverable shown below is due within [*] of receipt
     of the corresponding sign-off from SBCL, as set forth in more detail in 
     Attachment 1, Section 5.  The amount payable to ACTAMED by SBCL under this
     SOW is based on the estimates outlined in Attachment 2.

<TABLE>
<CAPTION>
     % OF TOTAL          AMOUNT           DELIVERABLE/MILESTONE
     ----------          ------           ---------------------
     <C>                 <C>              <C>
      [*]                [*]              [*]

      [*]                [*]              [*]

      [*]                [*]              [*]

      [*]                [*]              [*]

      [*]                [*]              [*]
</TABLE>


ACTAMED CORPORATION                SMITHKLINE BEECHAM CLINICAL
                                   LABORATORIES, INC.


By:   /s/                          By:   /s/
    ------------------------           --------------------------------
      Mike Hoover                        Rich Davis
      President                          Vice President
                                         Information Resources

Dated:   10/31/97                  Dated:   10/30/97
       ---------------------              -----------------------------




[*] Confidential Treatment Requested

                                         -17-
<PAGE>

                           AMENDMENT TO DEVELOPMENT AGREEMENT

SBCL and ActaMed hereby agree this 31st day of December, 1997, to amend their 
Development Agreement October 31, 1997, as set forth herein as of the 
effective dates set forth herein.

     1.   Effective as of the date of the Development Agreement, Article I of 
the Development Agreement is hereby amended to include the following 
additional or revised definitions:

          "ActaLab Software" has the meaning ascribed to it by the License 
     Agreement.

          "Deliverable" means all Software, Documentation and other materials 
     developed by ActaMed under this Agreement and described in a Statement of 
     Work.
  
          "License Agreement" means that certain License Agreement between 
     SBCL and ActaMed dated December 31, 1997.

          "SBCL Software" has the meaning ascribed to it by the License 
     Agreement.

          "SOW No. 1" shall mean the Statement of Work dated October 31, 1997.

     2.   The second "Whereas" clause is hereby deleted.

     3.   The fourth "Whereas" clause is hereby revised to delete the words 
"to SBCL."

     4.    Section 5.1(a) of the Development Agreement is hereby revised as 
of the date of the Development Agreement to read as follows:

                  (a)     the parties hereby acknowledge and agree that:

                          (i)   The Deliverables under SOW No. 1 do not 
     constitute modifications or enhancements to the SBCL Software, but 
     instead constitute a new Windows- and JAVA-based product which will be
     used in conjunction with and/or will be integrated into ActaMed's 
     ProviderLink software. All Deliverables (including but not limited to,
     the ActaLab Software) under SOW No. 1, and all intellectual property 
     rights (including but not limited to copyrights and all renewals and 
     extensions thereof) in such Deliverables, shall be owned solely and 
     exclusively by ActaMed. Subject to the provisions of Section 5(a)(iv) 
     hereof, SBCL hereby grants, transfers and assigns all of its right, title
     and interest in such Deliverables, including patents, copyrights, trade
     secrets and other

<PAGE>

     intellectual property developed or acquired in the course of creating 
     such Deliverables, to ActaMed and ActaMed shall have the right to obtain 
     and hold in its own name copyrights, patents, registrations and similar 
     protections which may be available with respect to such Deliverables.

                          (ii)   The parties contemplate that additional SOWs 
     may be entered into from time to time for the purpose of enhancing, 
     modifying or upgrading the ActaLab Software (an "ActaLab SOW"). All
     Deliverables under an ActaLab SOW and all intellectual property rights 
     (including but not limited to copyrights and all renewals and extensions
     thereof) in such Deliverables, shall be owned solely and exclusively by 
     ActaMed. Subject to the provisions of Section 5(a)(iv) hereof, SBCL hereby
     grants, transfers and assigns all of its right, title and interest in such 
     Deliverables, including patents, copyrights, trade secrets and other 
     intellectual property developed or acquired in the course of creating such
     Deliverables, to ActaMed and ActaMed shall have the right to obtain and
     hold in its own name copyrights, patents, registrations and similar 
     protections which may be available with respect to such Deliverables.

                          (iii)  The parties contemplate that additional SOWs 
     may be entered into from time to time for the purpose of enhancing, 
     modifying or upgrading the SBCL Software (a "SCAN Development SOW").
     Ownership of any Deliverables under a SCAN Development SOW, and ownership
     of any intellectual property rights therein (including but not limited to
     copyrights and all renewals and extensions thereof). shall be governed in
     all respects by Article 3 of the License Agreement. Subject to the 
     provisions of Section 5(a)(iv) hereof, ActaMed hereby grants, transfers
     and assigns all of its right, title and interest in such Deliverables, 
     including patents, copyrights, trade secrets and other intellectual 
     property developed or acquired in the course of creating such 
     Deliverables, to SBCL.

                          (iv)   Nothing in this Section 5(a) shall be 
     construed to transfer to ActaMed, or otherwise divest SBCL of SBCL's 
     ownership of, the SBCL Software and, subject to the licenses granted by the
     License Agreement, SBCL (as between SBCL and actaMed) shall be the sole 
     owner of the patents, copyrights, trade secrets and other intellectual 
     property rights therein. Nothing in this Section 5(a) shall be construed
     to transfer to SBCL, or otherwise divest ActaMed of ActaMed's ownership of,
     any software or work of authorship owned by ActaMed as of the effective 
     date of the Development Agreement and, subject to the licenses granted by
     the License Agreement, ActaMed (as between SBCL and ActaMed) shall be the
     sole owner of any patent, copyright, trade secret right or other 
     intellectual property right therein.

                          (v)    Any Statement of Work, by mutual agreement 
     of the parties, may include limitations and restrictions on ActaMed's use 
     of the applicable

                                     2

<PAGE>

Deliverables in support of laboratory testing services of commercial 
laboratories other than SBCL.

     6.   Sections 5.1(d) and (e) and Section 5.2(a) as of the date of this 
Amendment are hereby deleted from the Development Agreement.

     7.   In the event of conflict between the Development Agreement and the 
License Agreement, the License Agreement shall control.

     9.   Except as expressly set forth herein, the Development Agreement 
shall continue in full force and effect as originally executed by the parties.

     10.  Nothing in this Agreement shall be construed to modify or change in 
any respect the ownership and use rights with respect to Exclusive 
Developments (as defined in the Services Agreement between SBCL and ActaMed 
dated the date hereof) pursuant to the License Agreement and Section V of 
said Services Agreement.

          In witness whereof, the parties have caused this Amendment to be 
signed this 31st day of December, 1997.


SMITHKLINE BEECHAM CLINICAL                     ACTAMED CORPORATION
LABORATORIES, INC.

BY: /s/ John B. Okkenele Jr.                    BY: /s/ Michael K. Hoover
   ----------------------------                    ---------------------------
NAME: John B. Okkenele Jr.                      NAME: Michael K. Hoover
      -------------------------                       ------------------------
TITLE:      President                           TITLE:    President
       ------------------------                        -----------------------
DATE:       12-31-97                            DATE:     12-31-97
       ------------------------                        -----------------------

                                     3


<PAGE>
                        CONFIDENTIAL TREATMENT REQUESTED 

                    SERVICES, DEVELOPMENT AND LICENSE AGREEMENT


       This Agreement made this 15th day of December, 1997 (the "Effective
Date"), is by and between Healtheon Corporation, a Delaware corporation with
offices at 87 Encina Ave., Palo Alto, CA 94301 ("Healtheon") and Beech Street
Corporation, a Georgia Corporation with offices at 173 Technology, Irvine,
California 92618 ("BSC").

       WHEREAS, the parties have agreed to form an alliance to address the
information technology needs of BSC, develop new applications designed to
address the information service needs of companies providing managed care and
other administrative services and pursue other ventures which may be of mutual
interest to the parties. The parties hereby agree as follows:

1.     DEFINITIONS.

       1.1     "ADDITIONAL APPLICATIONS" shall mean those applications which are
developed by Healtheon, but excluding the Developed Applications and the
Healtheon Platform Software, which are designed to run on the Healtheon
Platform.

       1.2     "BSH DIVISION" shall mean the division of Healtheon which shall
be organized to perform the Services hereunder.

       1.3     "BSC CLIENT" shall mean those clients of BSC including but not
limited to, health care medical providers (E.G., physicians, hospitals, other
care facilities, and ancillary providers), third party administrators, preferred
provider organizations, health maintenance organizations, employers, unions,
governmental entities, credit card companies, reinsurance companies, health
benefit or workers' compensation software vendors, and medical management
vendors, which use BSC Managed Care Services or as to which BSC has incorporated
such entities' services into BSC Managed Care Services.

       1.4     "BSC MANAGED CARE SERVICES" shall mean the following types of
services provided by BSC to BSC Clients: personal health management (demand
management), workers' compensation medical bill review, case management,
pre-admission review, concurrent review, discharge planning, hospital bill
audit, retrospective non-network bill review and fee negotiation, health care
provider contracting and management, data reporting, computer operations,
service bureau services, consulting and other support services and such other
related new products/services that BSC shall develop subsequent to the execution
of this Agreement.  Notwithstanding the foregoing, Managed Care Services shall
not include any service where the primary service provided by BSC is either (i)
access to and/or use of  the BSC On-Line Service to obtain repricing services or
(ii) other repricing services offered by BSC to BSC Clients which use all or a
portion of the repricing functionality of the Developed Applications  The
Management Committee shall determine whether services based upon other
functionality of the Developed Applications shall be excluded from the
definition of "BSC Managed Care Services" at the time that the relevant
specifications for such Developed Applications are being developed.
Notwithstanding the foregoing, workers' compensation medical bill review
services shall be included as part of the BSC Managed Care Services regardless
of whether such services are offered alone or in conjunction with other BSC
Managed Care Services.


<PAGE>

       1.5     "BSC ON-LINE SERVICE" shall mean the on-line service provided by
BSC to BSC Clients which incorporates all or a portion of the Developed
Applications and any derivative works thereof.

       1.6     "DEVELOPED APPLICATIONS" shall mean those applications and any
improvements thereto which are developed by Healtheon hereunder and which are
designed to run on the Healtheon Platform, as more fully described on Exhibit B.

       1.7     "DEVELOPMENT WORK"  shall mean the work to be performed hereunder
by Healtheon to develop the Developed Applications.

       1.8      "END USER" shall mean any employee, partner, agent or other
representative of (i) BSC,  or (ii)  a BSC Client; who is authorized to access
the BSC On-Line Service in conjunction with obtaining BSC Managed Care Services.

       1.9     "HEALTHEON PLATFORM" shall mean the Healtheon Platform Software,
as well as certain industry standard software applications, tools, and processes
which provide the operating environment which enables the use of Healtheon
developed applications as part of an on-line service which is accessible through
the Internet by using industry standard web browsers.

       1.10    "HEALTHEON PLATFORM SOFTWARE" shall mean the proprietary
operating system and other software which has been developed by Healtheon (but
excluding the Developed Applications and the Additional Applications) which is
part of the operating system of the Healtheon Platform.

       1.11    "SERVICES" shall mean those information technology services
described on Exhibit A.

2.     PERFORMANCE OF THE SERVICES AND THE DEVELOPMENT WORK


       2.1     PERFORMANCE OF THE SERVICES.  Healtheon, through personnel
assigned to its BSH Division, shall perform the Services at certain sites
controlled by BSC and/or Healtheon.  The initial scope of the Services is set
forth as Exhibit A.  Exhibit A may be amended with the written consent of the
parties.

       2.2     PERFORMANCE OF THE DEVELOPMENT WORK. Healtheon shall design,
develop, test, and complete the Developed Applications. The specifications for
each Developed Application shall be developed jointly and mutually approved by
the parties.  In conjunction with the development of each set of specifications,
the parties shall jointly develop a mutually agreeable detailed project plan,
which shall be attached hereto as Exhibit B.  Such project plan shall describe,
in a degree of detail reasonably satisfactory to the parties, all tasks and
responsibilities required for the successful and timely completion of the
development and delivery of the applicable Developed Applications, including the
projected costs.

3.     PROJECT MANAGEMENT

       3.1     PERSONNEL RESOURCES. Healtheon and BSC shall each commit the
number of qualified and experienced personnel which are reasonably necessary to
perform their respective obligations under this Agreement and as further
outlined in the project plan(s).  Healtheon shall have the sole right and
obligation to hire, supervise, manage, contract, direct, procure, perform or
cause to be performed all work to be performed by Healtheon and its personnel
hereunder. Healtheon, at its option, may engage third parties to render services
in connection with the performance of the Services and/or Development Work
contemplated hereunder, which may include engaging the services of certain BSC
employees to


                                          2
<PAGE>

provide certain information technology services. All Healtheon employees
utilized to provide the Services shall have entered into Healtheon's standard
form of employee nondisclosure agreement.

       3.2     PROJECT MANAGEMENT. Each party shall designate a project manager
(the "Project Managers") and appropriate technical resource persons to
coordinate the development and implementation of the project plan(s). The
Project Managers shall be responsible for resolving any matters arising under
this Agreement and the Services and Development Work contemplated hereunder.  In
the event that the Project Managers are not able to resolve a dispute, such
dispute shall be resolved by the Management Committee, as described in Section
3.3.

       3.3     MANAGEMENT COMMITTEE.   The parties shall each designate an equal
number of management-level personnel to serve on the Management Committee.  The
Management Committee shall conduct status meetings on a monthly basis detailing
the performance of the Services and Development Work during the prior four (4)
week period and the work planned to be performed during the upcoming four (4)
week period.  The Management Committee shall be responsible for resolving any
disputes which have not been resolved by the Project Managers.  The Management
Committee shall be responsible for determining whether services based upon the
Developed Applications shall be included or excluded from the definition of "BSC
Managed Care Services" for the purposes of this Agreement.  If such services are
not excluded, then the Management Committee shall be responsible for
establishing the applicable financial arrangements, if any, pursuant to which
such services may be offered by BSC.

       3.4     CHANGES TO SERVICES, DEVELOPMENT WORK AND PROJECT PLAN. The scope
of the Services, the Development Work and the project plans shall not be changed
in any material respect without the prior written agreement of the parties,
which agreement shall not be unreasonably withheld.

4.     OWNERSHIP AND LICENSE RIGHTS.

       4.1     OWNERSHIP. BSC acknowledges and agrees that all of the work
product produced or developed by Healtheon in connection with Healtheon's
performance of the Services and/or Development Work  to be provided hereunder,
including, but not limited to, all technology of any nature whatsoever, all
notes, records, drawings, designs, inventions, improvements, developments,
discoveries, trade secrets and any copyrightable material, including but not
limited, to the Developed Applications, and all patentable inventions,
conceived, made or discovered by Healtheon, solely or in collaboration with
others, during the period of this Agreement and which relate in any manner to
the Services and/or Development Work to be performed hereunder or which
Healtheon may be directed to undertake or investigate in performing the Services
and/or the Development Work, including any derivative works of any of the
foregoing (collectively the "Work Product"), is the sole property of Healtheon,
but excluding BSC's contracts and contracted rates with BSC's providers, which
may be incorporated into the Work Product.  Subject only to the license rights
to be granted by Healtheon to BSC in Section 5.1, below, BSC acknowledges and
agrees that Healtheon shall have all proprietary rights in and to the Work
Product, including, without limitation, all copyrights, patents and trade secret
rights, all moral rights, all contract and licensing rights, and all claims and
causes of action of any kind with respect to any of the foregoing, whether now
known or hereafter to become known, and that Healtheon shall have the sole and
exclusive right to use, modify and exploit the Work Product in any manner that
Healtheon may choose.

       4.2     PROPRIETARY NOTICES. BSC shall not remove or alter any trademark,
trade name, copyright, or other proprietary notices, legends, symbols, or labels
appearing on or in materials pertaining to the Work Product.  Each portion of
the Healtheon documentation reproduced by BSC shall include the


                                          3
<PAGE>

intellectual property notice or notices appearing in or on the corresponding
portion of such materials as delivered by Healtheon hereunder.


5.     LICENSE AND SERVICE RIGHTS.

       5.1     LICENSE RIGHTS. In consideration for the development fees paid to
Healtheon pursuant to Section 7.1, Healtheon hereby grants to BSC a nonexclusive
and nontransferable, fully-paid, perpetual right and license, exercisable at
BSC's primary operations site, to: (i) install, use, copy, modify, create
derivative works and maintain the Developed Applications, in object code and
source code form, solely as (a) part of the BSC On-Line Services which are
offered to BSC Clients in conjunction with the BSC Managed Care Services
obtained by such BSC Clients and to enable world-wide remote access by End Users
in conjunction with the BSC On-Line Service and (b) for BSC's internal use in
providing BSC Managed Care Services to BSC Clients, and (ii) use the Work
Product (excluding the Developed Applications and any derivative works thereof)
delivered to BSC by Healtheon hereunder in conjunction with the operations of
BSC's  Managed Care Services.  BSC shall not use, sublicense or otherwise
distribute the Healtheon Platform Software or the Work Product, including the
Developed Applications and any derivative works thereof, in any other manner
except as expressly stated herein.  The BSC's primary operations site is
anticipated to be in Irvine, California.  BSC may from time to time designate
another site to be its primary operations site by providing Healtheon with
thirty (30) days' prior written notice of such redesignation. Notwithstanding
the foregoing, BSC shall make no more than two (2) copies of the source code
relating to the Developed Applications (the "Source Code") and shall restrict
access to such Source Code to only those employees who require such access to
enable BSC to use the Source Code as in the manner contemplated herein and
otherwise secure and protect such Source Code consistent with its own practices
regarding its most highly confidential information.

       5.2     OPTION TO LICENSE ADDITIONAL APPLICATIONS. Healtheon hereby
agrees to grant to BSC a nonexclusive and nontransferable, right and license, to
use the Additional Applications as may be licensed at the option of BSC, as part
of the services to be offered to BSC Clients in conjunction with the BSC Managed
Care Services, and to enable worldwide access to End Users in conjunction with
the BSC On-Line Service. The fee for such license shall be [     *     ] each
such Additional Application as may be licensed by BSC, net of any third-party
royalty obligations.  Each such license agreement for Additional Applications
shall be on commercially reasonable terms and conditions.  BSC shall not use,
sublicense or otherwise distribute the Additional Applications in any other
manner except as expressly stated herein.

       5.3     OPTION TO LICENSE HEALTHEON PLATFORM SOFTWARE.  Subject to the 
payment of the license fee set forth below, Healtheon hereby grants to BSC a 
nonexclusive and nontransferable, right and license, exercisable at BSC's 
primary operational site, to use the Healtheon Platform Software as part of 
the Healtheon Platform to be deployed at BSC's primary operational site to 
run the Developed Applications and such Additional Applications which may be 
licensed from Healtheon, as part of the BSC On-Line service or other BSC 
Managed Care Service to be offered to BSC Clients in conjunction with the BSC 
Managed Care Services obtained by such BSC Client, and to enable world-wide 
access and use by End Users at remote locations in conjunction with the use 
of the BSC On-Line Service and to make a single back-up copy.  The applicable 
one-time, up front fee for such license shall be [     *     ] payable upon 
such commercially reasonable terms as the parties may agree to at the time of 
BSC's exercise of its rights hereunder.  BSC shall not have the right to use, 
sublicense or otherwise distribute the Healtheon Platform Software in any 
other manner except as

[ * ] CONFIDENTIAL TREATMENT REQUESTED

                                          4

<PAGE>

expressly stated herein. BSC shall be solely responsible for the costs
associated with acquiring all third-party hardware and software and
implementation services necessary to deploy the Healtheon Platform at BSC's
site.  In the event the BSC exercises its rights hereunder, Healtheon shall make
available to BSC maintenance services on such commercially reasonable terms and
conditions as may be agreed to by the parties.

       5.4     OPTION TO USE HEALTHEON SERVICE.  If, following the completion 
of the Developed Applications, BSC declines to use its licensed rights under 
Section 5.1, Healtheon hereby agrees to enter into a Healtheon Service 
Agreement with BSC containing Healtheon's standard terms and conditions 
whereby Healtheon shall provide BSC and BSC Clients with access to an on-line 
service which includes the Developed Applications. Healtheon shall offer such 
service to BSC and the BSC Clients at a rate [     *     ] as may be mutually 
agreed to by the parties, based upon the actual margins of the on-line 
service.

6.     THIRD-PARTY TECHNOLOGY AND LICENSE RIGHTS

       6.1     THIRD-PARTY TECHNOLOGY AND LICENSE RIGHTS.  In order to perform
the Services contemplated hereunder (but excluding Services relating solely to
the Developed Applications), BSC represents that Healtheon will need to have
access only to the third-party technology and software listed on Exhibit C which
is licensed and/or deployed by BSC (the "Third-Party Technology and Software").
BSC hereby agrees to use commercially reasonable efforts to obtain, at its own
expense, all necessary consents, licenses and/or assignments which may be
necessary in order for Healtheon to perform the such Services.  Healtheon shall
use commercially reasonable efforts to cooperate with BSC to assist BSC in
obtaining any necessary consents, licenses and/or assignments to Third-Party
Technology and Software.  In the event that any Development Work requires access
to or use of any other third-party technology or software, the Management
Committee shall be responsible for  obtaining any necessary rights.


       6.2     BSC TECHNOLOGY AND LICENSE RIGHTS.  During the term of this
Agreement, BSC hereby grants to Healtheon a nonexclusive and nontransferable
right and license to use, modify and copy all technology and software owned by
BSC which is necessary for Healtheon to perform the Services and Development
Work.

7.     FEES AND PAYMENT; GAIN SHARING

       7.1     FEES AND EXPENSES, PAYMENT. BSC shall pay Healtheon the Fees and
Expenses, as set forth in Exhibit D for the Services and the Development Work to
be performed hereunder (the "Fees").  Healtheon shall submit invoices to BSC on
a bi-weekly  basis for the Fees when due, corresponding to applicable payroll
cycles. Invoices shall be due and payable within ten (10) days after receipt.

       7.2     OTHER EXPENSES. Healtheon shall have sole responsibility for
payment of compensation to its personnel and shall pay and report, for all
personnel assigned to perform services hereunder, federal and state income tax
withholding, social security taxes, and unemployment insurance applicable to
such personnel. Healtheon shall bear sole responsibility for any health or
disability insurance, retirement benefits, or other welfare or pension benefits
(if any) to which its own personnel may be entitled.

       7.3     REVENUE SHARING. In the event that BSC declines to use its
licensed rights under Section 5.1 and Healtheon provides services in accordance
with Section 5.4 for any current or future BSC Client

[ * ] CONFIDENTIAL TREATMENT REQUESTED


                                          5

<PAGE>

which (i) utilizes any of the  Developed Applications and (ii) such BSC 
Client has entered into a written contract for one or more of BSC's Managed 
Care Services (a "Qualified BSC Client"), then BSC shall pay to Healtheon the 
Applicable Percentage (as defined below) of Net Revenues (as defined below 
with respect to repricing services) with respect to each such Qualified BSC 
Client. "Net Revenues" shall mean the revenues received by BSC from a 
Qualified BSC Client for BSC Managed Care Services less any fees paid by BSC 
to any third party which facilitates the sale or delivery of BSC's Managed 
Care Services, including but not limited to leased network fees, broker fees, 
commissions paid to outside third parties, fees payable to Healtheon pursuant 
to Section 5.4, subcontractor vendor fees and other such reasonable and 
customary fees as may apply from time to time.  The "Applicable Percentage" 
with respect to BSC's repricing services shall be as follows: [     *     ]  
The revenue sharing described above will be reviewed by the Management 
Committee periodically, and at least on an annual basis, to determine that 
the cost savings objectives are being achieved and to determine the 
appropriate applicable percentage for other BSC Managed Care Services which 
are performed through the Healtheon service as the applicable Developed 
Applications are deployed as part of the Healtheon service.  Additionally if 
other significant cost savings are identified they will be reviewed by the 
Management Committee to determine appropriate sharing.

       7.4     THIRD-PARTY HARDWARE AND SOFTWARE.  In the event that it is
reasonably necessary for Healtheon to purchase or license any third-party
hardware and/or software in order to perform the Services and/or the Development
Work, the Project Managers shall determine whether such third-party hardware
and/or software should be purchased and/or licensed by BSC or Healtheon and how
the costs and ownership shall be allocated between the parties.

       7.5     TAXES.  All Fees and payments are exclusive of all taxes, duties
or levies, however designated or computed.  BSC shall be responsible for and pay
all taxes upon payments due under this Agreement including, but not limited to,
sales, use, or value-added taxes, duties, withholding taxes and other
assessments now or hereafter imposed on or in connection with this Agreement,
exclusive of taxes based upon Healtheon's net income.

       7.6     AUDIT RIGHTS.  Each of the parties shall have the right,
exercisable no more frequently than once per calendar quarter and exercisable
upon thirty (30) days prior written notice, to audit the appropriate books and
records of the other party during regular business hours to review the
calculations of the amounts payable pursuant to Section 7.  The costs of such
audit shall be borne by the auditing party, unless the results of such audit
reveal an underpayment (or overpayment) of more than ten percent (10%) for a
twelve month period, in which case the reasonable expenses of the auditing party
shall be reimbursed by the other party.  The parties shall promptly pay (or
refund) to the other, the amounts of any underpayments (or overpayments).

8.     CONFIDENTIALITY

       8.1     CONFIDENTIAL INFORMATION.  The parties acknowledge that in the
course of performing under this Agreement, each party may be exposed to or
acquire information which is proprietary to or confidential to the other party,
its suppliers or customers ("Confidential Information"). Any and all such
Confidential Information of one party in any form obtained by the other party or
its employees, agents,

[ * ] CONFIDENTIAL TREATMENT REQUESTED


                                          6

<PAGE>


or representatives in the performance of this Agreement shall be deemed to be
confidential and proprietary information of such party. The parties agree to
hold such Confidential Information in strict confidence, to only permit use of
such Confidential Information by its employees and agents having a need to know
in connection with performance under this Agreement, and not to copy, reproduce,
sell, assign, license, market, transfer, give or otherwise disclose the
Confidential Information of the other party to third parties or to use such
Confidential Information for any purposes whatsoever, except as expressly
contemplated by this Agreement, without the express written permission of the
other party and to advise each of their employees, agents, and representatives
of their obligations to keep such information confidential. Work Product shall
be deemed to be the Confidential Information of Healtheon.

       8.2     EXCEPTIONS TO CONFIDENTIAL INFORMATION. Confidential Information
shall not include information that (i) was, as of the time of its disclosure, or
thereafter becomes part of the public domain through a source other than the
receiving party; (ii) the receiving party can demonstrate was known to the
receiving party as of the time of its disclosure; (iii) the receiving party can
demonstrate was independently developed by the receiving party without use of
the Confidential Information; or (iv) the receiving party can demonstrate was
subsequently learned from a third party not under a confidentiality obligation
to the providing party.  In the event that a receiving party is required to
disclose certain Confidential Information of a disclosing party pursuant to
applicable law, court order or government authority, the receiving party shall
provide reasonable notice to the disclosing party prior to such disclosure and
shall cooperate with the disclosing party to obtain protection from such
disclosure.

9.     REPRESENTATIONS AND WARRANTIES

       9.1     WARRANTIES FOR SERVICES AND THE DEVELOPMENT WORK. Healtheon
hereby represents and warrants that (i) each person assigned to perform the
Services and/or the Development Work shall have the proper skill, training and
background so as to be able to perform the such Services and/or Development
Work in a competent and professional manner and (ii) all Services and/or
Development Work and any Work Product and other materials or documentation
delivered under this Agreement shall have been completed in a thorough and
professional manner.  In the event of a breach of Healtheon's representations
and warranties under this Section 9.1, Healtheon's sole obligation shall be to
promptly correct any defects identified by BSC, provided that BSC provides
Healtheon with written notice within thirty (30) days of becoming aware of the
defective work.

       9.2     THIRD-PARTY TECHNOLOGY.  BSC hereby represents and warrants that
it has obtained all necessary consents, licenses and/or assignments with respect
to the Third-Party Technology and Software which is licensed and/or deployed by
BSC and which are necessary in order for Healtheon to perform the Services and
Development Work to be performed hereunder.

       9.3     AUTHORITY.  Healtheon and BSC each hereby represents and warrants
to the other that it is duly organized and validly existing under the laws of
the jurisdiction in which it is organized, in good standing therein, and has the
power to enter into this Agreement and to perform its obligations hereunder and,
furthermore, that the performance by it of its obligations under this Agreement
has been duly authorized by all necessary corporate or other action and will not
violate any provision of law or regulation or of any corporate charter or
bylaws.

       9.4     INFRINGEMENT.  Healtheon and BSC each hereby represents and
warrants to the other that any information or technology provided by it to the
other party in order to define the specifications or to accomplish the
development objectives of this Agreement does not infringe, violate,
misappropriate, or


                                          7
<PAGE>

in any manner contravene or breach any U.S. patent or any trademark, copyright,
trade secret right, license or other property, or proprietary right of any third
party.

       9.5     NO IMPLIED WARRANTIES.  THE WARRANTIES STATED ABOVE IN THIS
SECTION 9 ARE THE ONLY WARRANTIES MADE BY EITHER PARTY. THE PARTIES DO NOT MAKE
AND HEREBY DISCLAIM ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT
LIMITED TO, WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
THE PARTIES ACKNOWLEDGES THAT COMPLEX COMPUTER SOFTWARE AND SERVICES, SUCH AS
THE DEVELOPED APPLICATIONS AND THE SERVICES, ARE RARELY FREE OF DEFECTS OR
ERRORS AND HEALTHEON DOES NOT WARRANT THE SAME.

10.    LIMITATION OF LIABILITY

       EXCLUSION OF CERTAIN DAMAGES. [     *     ] UNDER NO CIRCUMSTANCES AND 
UNDER NO LEGAL THEORY SHALL EITHER PARTY HAVE ANY LIABILITY FOR LOSS OF 
PROFITS, CONSEQUENTIAL, EXEMPLARY, INCIDENTAL OR PUNITIVE DAMAGES, EVEN IF 
SUCH PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

       10.2    LIMITATION OF LIABILITY.  [     *     ] IN NO EVENT SHALL 
EITHER PARTY'S AGGREGATE LIABILITY FOR ALL MATTERS ARISING OUT OF THE SUBJECT 
MATTER OF THIS AGREEMENT, WHETHER IN CONTRACT, TORT OR OTHERWISE [    *    ].
The remedies provided herein are the parties' sole and exclusive remedies.

11.    INDEMNIFICATION

       11.1    INDEMNIFICATION.  Healtheon agrees to hold harmless and defend
BSC from and against any and all claims, demands, suits, actions, or
proceedings, arising out of any actual or alleged infringement by Healtheon of
any copyright or any U.S. patent, trademark, or trade secret right or other
proprietary right, with respect to the Work Product and Healtheon Platform
Software, as delivered by Healtheon hereunder and used by BSC in accordance with
the terms of this Agreement.  BSC agrees to hold harmless and defend Healtheon
from and against any and all claims, demands, suits, actions, or proceedings,
arising out of any actual or alleged infringement by Healtheon of any copyright
or any U.S. patent, trademark, or trade secret right or other proprietary right
which arises out of BSC's failure to obtain any necessary consents, licenses, or
assignments with respect to any Third-Party Technology or Software which has
been licensed and/or deployed by BSC and which is necessary in order for
Healtheon to perform the Services (but excluding Services relating solely to the
Developed Applications).

       11.2    LIMITATIONS.  Healtheon shall have no indemnity obligation for
claims resulting from or alleged to result from (i) development work performed
by Healtheon in compliance with BSC's specifications where Healtheon's method of
compliance has been specifically compelled by the terms of BSC's specifications;
or (ii) BSC's use of the Work Product in combination with any hardware or
software not furnished by or authorized by Healtheon hereunder, if such
combination is the cause of such claim and the Work Product is not material to
the claim, or any modifications which have been made by BSC if such modification
is the cause of the claim.  In addition, Healtheon shall have no indemnity

[ * ] CONFIDENTIAL TREATMENT REQUESTED


                                          8

<PAGE>

obligation for claims of infringement resulting or alleged to result from BSC's
failure within a reasonable time frame to implement any replacement or
modification which conforms to the requirements of Section 11.4 herein. BSC
shall have no indemnity obligations for claims resulting from or alleged to
result from Healtheon's breach of any Third-Party Technology or Software rights
where appropriate consents, licenses and/or assignments were obtained and
provided to Healtheon and Healtheon failed to adhere to the terms of applicable
consents, licenses and/or assignments.

       11.3    PAYMENT AND COOPERATION. Subject to the limitations set forth in
Section 11.2 above, the indemnifying party shall pay all losses, damages,
damages, settlements, expenses, costs and reasonable attorney's fees, incurred
by the indemnified party arising out of the matters set forth in Section 11.1
provided that such payment shall be contingent on: (i) cooperation by the
indemnified party with the indemnifying party in the defense and or settlement
thereof, at the indemnifying party's  expense; and (ii) allowing the
Indemnifying Party to control the defense and all related settlement
negotiations.  The indemnified party shall give the indemnifying party prompt
written notice of any such claim to enable the indemnifying party to defend or
mitigate the claim.

       11.4    REMEDY.  If, in the event of an infringement action pertaining to
the Work Product, including the Developed Applications, and/or Healtheon
Platform Software and BSC's use of the such Work Product and/or Healtheon
Platform Software is disrupted, Healtheon shall, at its option, (i) provide BSC
with access to software which is functionally equivalent to the infringing
elements of the Work Product and/or Healtheon Platform Software as applicable,
without additional charge; (ii) modify the infringing portions of the Work
Product and/or Healtheon Platform Software, as applicable, to avoid the
infringement; or (iii) obtain a license for BSC to continue use of such Work
Product and/or Healtheon Platform Software, as applicable, for the term of the
applicable license and pay, on an annual basis, if Healtheon elects not to
acquire a perpetual license, the additional fee required for such license(s).

       11.5    LIMITATIONS.  SECTION 11 SETS FORTH THE PARTIES' SOLE OBLIGATION,
AND THE SOLE RECOURSE AGAINST THE OTHER PARTY IN THE EVENT OF ANY CLAIM OF
INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY RIGHTS.

12.    TERM AND TERMINATION

       12.1.   TERM.  This Agreement shall continue for a fixed term of five 
(5) years from the date hereof (the "Term") unless terminated earlier under 
the provisions of this Section 12 or by the mutual agreement of the parties. 
Notwithstanding the foregoing, (i) the license granted in Section 5.1 shall 
have a perpetual term unless terminated earlier pursuant to Section 12.3 or 
12.4, or by the mutual consent of the parties; and (ii) the license granted 
in Section 5.3, if exercised, shall continue for a term of [     *     ] from 
the Effective Date and shall renew automatically for successive additional 
[     *     ] terms unless terminated earlier pursuant to Section 12.3 or 
12.4, or by the mutual consent of the parties.

       12.2    TERMINATION FOR CONVENIENCE. Either party may terminate this
Agreement upon one hundred-eighty (180) days prior written notice to the other
for any reason.   Promptly following the notice of termination the parties shall
use good faith efforts to agree to a commercially reasonable transition plan
which will enable the parties' to mitigate to on-going expenses during the
notice period.

       12.3    TERMINATION BY EITHER PARTY FOR DEFAULT.  If either party
defaults in the performance of any material provision of this Agreement, then
the non-defaulting party may give written notice to the defaulting party that if
the default is not cured within thirty (30) days of such notice the Agreement
will be terminated.  If the non-defaulting party gives such notice and the
default is not cured during the thirty

[ * ] CONFIDENTIAL TREATMENT REQUESTED


                                          9

<PAGE>

(30) day period, then the Agreement shall automatically terminate at the end of
that thirty (30) day period.

       12.4    INSOLVENCY.  Either party may terminate this Agreement by written
notice to the other, and may regard the defaulting party as in default of this
Agreement, if the defaulting party becomes insolvent, makes a general assignment
for the benefit of creditors, suffers or permits the appointment of a receiver
for its business or assets, becomes subject to any proceeding under any
bankruptcy or insolvency law whether domestic or foreign, or has wound up or
liquidated, voluntarily or otherwise.

       12.5    EFFECT OF TERMINATION. The provisions of Sections 7 (solely with
respect to Fees and other payments which were due and payable as of the date of
termination), 4, 8, 10, 11, and 13 (to the extent applicable) shall survive the
termination of this Agreement for any reason.  All other rights and obligations
of the parties shall cease upon termination of this Agreement.  In the event of
a termination, neither party shall be entitled to any refund of the fees paid or
cost incurred for the development performed hereunder. Provided that this
Agreement is not terminated by Healtheon pursuant to either Section 12.3 or 12.4
or by BSC pursuant to Section 12.2, upon termination, Healtheon shall deliver to
BSC a copy of each Developed Application which has been completed as of the date
of termination, in source and object code form, and the related user
documentation, and, in the event of the exercise of BSC's option pursuant to
Section 5.3, Healtheon shall deliver to BSC a copy of Healtheon Platform
Software in object code form.

       12.6    RETURN OF MATERIALS. Within thirty (30) days after the
termination of this Agreement, each party shall return to the other, all
Confidential Information, and other material of any kind which is the property
of the other party.

13.        GENERAL

       13.1    NO EXCLUSIVITY OR RESTRICTION ON OTHER ACTIVITY.  Except as
expressly set forth in this Agreement, nothing herein shall preclude either
party from entering into agreements to obtain similar services or development
work from third parties or from providing similar services or development work
to third parties.

       13.2    RELATIONSHIP OF PARTIES.  The relationship of the parties shall
be that of independent contractors. Neither party will represent that it has any
authority to assume or create any obligation, express or implied, on behalf of
the other party, or to represent the other party as agent, employee, or in any
other capacity, except as specifically provided herein.

       13.3    BINDING EFFECT; ASSIGNMENT.  This Agreement shall be binding on
and inure to the benefit of the respective parties and their permitted
successors and assigns. Neither party shall not transfer, assign, sublicense or
subcontract any right or obligation hereunder, except as expressly provided
herein. In the event of a change in control of BSC, BSC shall be permitted to
assign this Agreement to the surviving or new corporation acquiring all or
substantially all of the business and assets of BSC by merger, acquisition,
consolidation or otherwise, with the prior written consent of Healtheon, which
consent shall not be unreasonably withheld.  BSC may assign its rights under
this Agreement to an entity which is controlled by BSC with the prior written
consent of Healtheon, which consent shall not be unreasonably withheld.  It
shall not be unreasonable for Healtheon to withhold its consent if any proposed
assignment would materially increase Healtheon's obligations under this
Agreement or materially increase the scope of BSC's rights (including but not
limited to the grant of rights contained in Section 5) or if such proposed
assignee is a competitor of Healtheon.


                                          10
<PAGE>

       13.4    NO WAIVER.  Either party's failure to exercise any right under
this Agreement shall not constitute a waiver of any other terms or conditions of
this Agreement with respect to any other or subsequent breach, nor a waiver by
such party of its right at any time thereafter to require exact and strict
compliance with the terms of this Agreement.

       13.5    NOTICES.  All notices or other communications which are required
or permitted to be given hereunder shall be in writing and shall be sent to the
address of the recipient set forth below or such other address as the recipient
may designate by notice given in accordance with the provisions of this Section
with copies to:


In the case of Healtheon:            In the case of BSC:

    Healtheon Corporation                Beech Street Corporation
    87 Encina Avenue                     173 Technology
    Palo Alto, California 94301          Irvine, California 92618
    Attn:  President                     Attn:  President and COO
    Copy to:  General Counsel            Copy to:  Chief Financial Officer

Any such notice shall be delivered by either (i) first class registered or
certified airmail, postage prepaid, and shall be deemed to have been served
forty-eight (48) hours after posting; or (ii) express courier service, service
fee prepaid, and shall be effective upon delivery.

       13.6    APPLICABLE LAW.  This Agreement shall be governed by and
construed in accordance with the laws of the State of California.

       13.7    SEVERABILITY.  The invalidity of one or more phrases, sentences,
clauses or articles contained in this Agreement shall not affect the remaining
portions of this Agreement or any part thereof; and in the event that one or
more phrases, sentences, clauses or articles shall be declared void or
unenforceable this Agreement shall be amended to include only such portions of
such phrases, sentences, clauses or articles that are not invalid, void or
unenforceable.

       13.8    ENTIRE AGREEMENT; AMENDMENTS.  This Agreement, along with the
Exhibits attached hereto, sets forth the entire agreement between the parties
and supersedes any other prior proposals, agreements and representations between
them related to its subject matter, whether written or oral, including but not
limited to the Letter of Intent between the parties.  No modifications or
amendments to this Agreement shall be binding upon the parties unless made in
writing and duly executed by authorized officials of both parties.

       13.9    ATTORNEYS FEES.  The prevailing party in any dispute shall be
entitled to collect from the other party the prevailing party's reasonable
attorneys' fees and costs in connection with the enforcement of this Agreement.

       13.10   NON-SOLICITATION OF EMPLOYEES.  Neither party shall solicit the
services or employment of any employee or agent of the other party for a period
beginning at the Effective Date and ending on the termination date of this
Agreement, without the prior written consent of the other party.  The soliciting
party, who violates this Section 13.10, shall pay to the other party an amount
equal to one (1) year's salary for any solicited employee of the other party, as
liquidated damages and not as a penalty.  The amount of annual salary shall be
the annual salary in effect at the date the employee was solicited.  For



                                          11
<PAGE>

purposes of this Section, the term "employee" means current or former 
employees of the other party who were employed by the other party at any time 
during the period beginning on the Effective Date and ending on the date on 
which the nonsolicitation period above terminates.  Initiation by an 
individual of contact regarding employment or response by an individual to an 
advertisement or other generally available notice, shall not constitute 
solicitation.

       13.11   BANKRUPTCY.  The parties agree that the Agreement and any related
agreements are contracts under which Healtheon is a licensor of rights to
intellectual property within the scope of Section 101 of the United States
Bankruptcy Code and that BSC shall have all the rights of a licensee set forth
in Section 365(n) of the Bankruptcy Code.  Upon the commencement of a bankruptcy
petition involving either party, the other party shall be entitled to retain and
may fully exercise all rights and licenses available under the Bankruptcy Code.

       13.12   USE OF NAME. Neither party shall use the name of the other party,
or refer to the other party, directly or indirectly, in any advertising, sales
presentation, news release, information provided to any profession or trade
publication, or any other promotional or informational material, for any purpose
whatsoever, or in any manner indicate any endorsement or support of any product,
without such party's prior written approval.

       13.13   RESIDUAL INFORMATION.  Without prejudice to either party's
proprietary rights, neither party shall be liable for using general ideas,
concepts and know-how that may be gained as a result of exposure to or contact
with the other party or its materials.

       13.14   ESCROW.  Healtheon agrees that it will put the Healtheon Platform
Software and the Developed Applications, as they are developed, in escrow with
an independent escrow agent.  The escrow agreement will be on terms and
conditions which are mutually agreeable to parties.

IN WITNESS WHEREOF, the parties have caused this Agreement to be duly executed
as of the day and year first written above.


          Healtheon Corporation             Beech Street Corporation



By:   /s/                            By:  /s/
   --------------------------------     --------------------------------

Title: President & CEO               Title:  President & CEO
      -----------------------------        -----------------------------

Date:  12/15/97                      Date:   12/15/97
   --------------------------------     --------------------------------


                                          12

<PAGE>

                                     EXHIBIT A

                                      SERVICES


Healtheon will operate and maintain BSC's information technology infrastructure
and data processing functionality and related services, including the following
types of services, as necessary and agreed to by the parties:
     -    maintain hardware operations
     -    maintain software infrastructure
     -    maintain data network(s)
     -    desktop computing
     -    provide internal and external technical support
     -    provide project planning and management
     -    software installation
     -    hardware installation
     -    provide user technical support
     -    provide user training
     -    provide IT personnel management services
     -    provide IT consulting services
     -    provide custom software solution design and development services


                                          13
<PAGE>

                                     EXHIBIT B

                             DEVELOPMENT WORK OVERVIEW

Healtheon shall provide an engineering team staffed with up to forty engineers
by December 31, 1998 to perform the general development tasks set forth below (
the "Development Team").  The Development Team will begin staffing during
January, 1998 and is anticipated to be fully staffed by December 31, 1998.
Unless otherwise agreed to by the parties, the Development Team will remain
fully staffed during calendar years 1999, 2000 and 2001 and will reduce its
staffing during calendar year 2002, depending upon the resources need to fulfill
the Development Work in accordance with the project plans which are developed by
the parties pursuant to Section 2.2.  In the event that the applicable project
plans, as they are agreed to by the parties pursuant to Section 2.2, require
additional personnel resources, the parties will revise the Development Team
staffing commitments hereunder.  The Development Team will develop the following
types of internet-based solutions, but not limited to, with the objective of
creating a Network Computing PPO/Managed Care capability:

- -    Claims Repricing
- -    Integrated Provider Management System
- -    Demand Management(Personal Health Management)
- -    Interfaces to internal and external systems (which are not "custom
     development")


Phase 1 of the Development Work will consist of developing appropriate Project
Plans and related design specifications and cost estimates to be approved by
Management Committee.  The work products of this phase will consist of:
          1.   An overall Project Plan;
          2.   Specific Project Plans and general specifications for Claims
               Repricing and Integrated Provider Management; and
          3.   General specifications for the Demand Management service and
               internet integration of the Demand Management service.

Phase 1 is anticipated to take approximately sixty work days to complete with
interim deliverables as tasks are completed and submitted to the Management
Committee for approval.


                                          14

<PAGE>

                                       XHIBIT C

                         THIRD-PARTY TECHNOLOGY AND SOFTWARE


                                          15
<PAGE>

                                      EXHIBIT D

                                  FEES AND EXPENSES

1.   FEES AND EXPENSE FOR SERVICES AND "CUSTOM DEVELOPMENT" WORK.

     [     *     ] of the "costs" incurred by Healtheon which are associated 
with performing the Services and any "custom" development work performed on 
behalf of BSC.

     For the purposes of this Agreement, "Custom" development work shall mean
any development work performed to meet BSC's own specifications which is not
anticipated to be reusable for other Healtheon clients.

2.   FEES AND EXPENSE FOR DEVELOPMENT WORK FOR THE DEVELOPED APPLICATIONS

     [     *     ] of the "costs" incurred by Healtheon which are associated 
with developing the Developed Applications.

3.   DEFINITION OF "COST."

For the purposes of this Agreement "cost" shall be defined as follows:

     A.   For employees/contractors assigned to perform the Services and/or 
Development Work on a full-time basis, "cost" will include direct expenses 
(such as salary, benefits, recruiting, consulting, travel, etc.), support 
expenses (rent, phone, computing, office expenses) and allocated expenses 
(such as management, administration, other overhead cost, etc.).   The 
average hourly loaded cost per employee is currently approximately 
[     *     ] per hour.

     B.   For Healtheon's employees that are not assigned to perform the
Services and/or Development Work on a full-time basis, they will charge their
time performing or supporting the Services and/or Development Work based on a
set rate, which is subject to change based on the cost structure of Healtheon.
The initial rates are :-

     Level 1   [     *     ] per hour
     Level 2   [     *     ] per hour
     Level 3   [     *     ] per hour

     C.   For Healtheon's employees that are not generally assigned to perform
the Services and/or Development Work on a regular basis, they will charge their
time providing short term consulting services to this project based on a reduced
standard consulting rate.  The current rates, [     *     ] are :-

     Level 1   [     *     ] per hour
     Level 2   [     *     ] per hour
     Level 3   [     *     ] per hour

Cost for additional capital equipment or computer processing needed to perform
the Services or Development Work will be invoiced separately.

[ * ] CONFIDENTIAL TREATMENT REQUESTED


                                          16


<PAGE>

                          CONFIDENTIAL TREATMENT REQUESTED

                    SERVICES, DEVELOPMENT AND LICENSE AGREEMENT


     This Agreement made this 30th day of September, 1997 (the "Effective 
Date"), is by and between Healtheon Corporation, a Delaware corporation with 
offices at 87 Encina Ave., Palo Alto, CA 94301 ("Healtheon") and Brown & 
Toland Physician Services Organization, with offices at 1388 Sutter Street, 
Suite 400, San Francisco, CA 94109 ("B&T").

     WHEREAS, the parties have agreed to form an alliance to address the 
information technology needs of B&T, develop new applications designed to 
address the needs of physician practice groups, and pursue other ventures 
which may be of mutual interest to the parties. The parties hereby agree as 
follows:

1.   DEFINITIONS.

     1.1    "ADDITIONAL APPLICATIONS" shall mean those applications which are 
developed by Healtheon, but excluding the Developed Applications, which are 
designed to run on the Healtheon Platform.

     1.2    "BTH DIVISION" shall mean the division of Healtheon which shall 
be organized to perform the Services hereunder.

     1.3    "B&T SERVICE" shall mean B&T's physician practice management 
services, including the practice management services listed on Exhibit A.

     1.4    "DEVELOPED APPLICATIONS" shall mean those applications and any 
improvements thereto which are developed by Healtheon hereunder and which are 
designed to run on the Healtheon Platform.

     1.5    "DEVELOPMENT WORK"  shall mean the work to be performed hereunder 
by Healtheon to develop the Developed Applications.

     1.6     "END USER" shall mean any employee, partner, agent or other 
representative of a Physician Group who is authorized to access and use the 
B&T Service.

     1.7    "HEALTHEON PLATFORM" shall mean the Healtheon Platform Software, 
as well as certain industry standard software applications, tools, and 
processes which provides the operating environment which enables the use of 
Healtheon developed applications as part of an on-line service which is 
accessible through the Internet by using industry standard web browsers.

     1.8    "HEALTHEON PLATFORM SOFTWARE" shall mean the proprietary 
operating system and other software which has been developed by Healtheon 
which is part of the operating system of the Healtheon Platform.

     1.9    "PHYSICIAN GROUPS" shall mean those physician practice groups for 
which B&T provides the B&T Service.

     1.10   "SERVICES" shall mean those information technology services 
described on Exhibit B.

                                         -1-
<PAGE>

2.   PERFORMANCE OF THE SERVICES AND THE DEVELOPMENT WORK

     2.1    PERFORMANCE OF THE SERVICES.  Healtheon, through personnel assigned
to its BTH Division, shall perform the Services at certain sites controlled by
B&T and/or Healtheon.  The initial scope of the Services is set forth as Exhibit
B.  Exhibit B may be amended with the written consent of the parties.  Healtheon
shall perform the Services in accordance with the guidelines set forth in
Exhibit B.

     2.2    PERFORMANCE OF THE DEVELOPMENT WORK. Healtheon shall design,
develop and complete the Developed Applications. The specifications for each
Developed Application shall be developed jointly and mutually approved by the
parties.  In conjunction with the development of each set of specifications, the
parties shall jointly develop a mutually agreeable detailed project plan.  Such
project plan shall describe, in a degree of detail reasonably satisfactory to
the parties, all tasks and responsibilities required for the successful and
timely completion of the development and delivery of the applicable Developed
Applications.

3.   PROJECT MANAGEMENT

     3.1    PERSONNEL RESOURCES. Healtheon shall commit the number of qualified
and experienced personnel which are necessary to perform its obligations under
this Agreement and as further outlined in the project plan(s).  Healtheon shall
have the sole right and obligation to hire, supervise, manage, contract, direct,
procure, perform or cause to be performed all work to be performed by Healtheon
and its personnel hereunder. Healtheon may engage third parties to render
services in connection with the performance of the Services and/or Development
Work contemplated hereunder.

     3.2    MANAGEMENT BOARD.   The parties shall establish a project executive
committee consisting of three (3) senior level employees from each party (the
"Management Board").  The Management Board shall have overall project oversight
responsibility and management, shall establish appropriate project leadership,
and shall be responsible for resolving any matters arising under this Agreement
and the Services and Development Work contemplated hereunder.

     3.3    STATUS MEETINGS. The parties shall conduct status meetings on a
monthly basis detailing the performance of the Services and Development Work
during the period and the work planned to be performed during the upcoming four
(4) week period.

     3.4    CHANGES TO SERVICES, DEVELOPMENT WORK AND PROJECT PLAN. The scope
of the Services, the Development Work and the project plans shall not be changed
in any material respect without the mutual written agreement of the parties,
which agreement shall not be unreasonably withheld.

4.   OWNERSHIP AND LICENSE RIGHTS.

     4.1    OWNERSHIP. B&T acknowledges and agrees that all of the work product
produced or developed by Healtheon in connection with Healtheon's performance of
the Services and/or Development Work  to be provided hereunder, including, but
not limited to, all technology of any nature whatsoever, all notes, records,
drawings, designs, inventions, improvements, developments, discoveries, trade
secrets and any copyrightable material, including but not limited, to the
Developed Applications, and all patentable inventions, conceived, made or
discovered by Healtheon, solely or in collaboration with others, during the
period of this Agreement and which relate in any manner to the Services and/or
Development Work to be performed hereunder or which Healtheon may be directed to
undertake or investigate, or which Healtheon may become associated with in
performing the Services and/or the

                                         -2-
<PAGE>

Development Work, including any derivative works of any of the foregoing
(collectively the "Work Product"), is the sole property of Healtheon.  Subject
only to the license rights to be granted by Healtheon to B&T in Section 5.1,
below, B&T acknowledges and agrees that Healtheon shall have all proprietary
rights in and to the Work Product, including, without limitation, all
copyrights, patents and trade secret rights, all moral rights, all contract and
licensing rights, and all claims and causes of action of any kind with respect
to any of the foregoing, whether now known or hereafter to become known, and
that Healtheon shall have the sole and exclusive right to use, modify and
exploit the Work Product in any manner that Healtheon may choose.

     4.2    PROPRIETARY NOTICES. B&T shall not remove or alter any trademark,
trade name, copyright, or other proprietary notices, legends, symbols, or labels
appearing on or in materials pertaining to the Work Product.  Each portion of
the Healtheon documentation reproduced by B&T shall include the intellectual
property notice or notices appearing in or on the corresponding portion of such
materials as delivered by Healtheon hereunder.

5.   LICENSE AND SERVICE RIGHTS.

     5.1    LICENSE RIGHTS. Healtheon grants to B&T a nonexclusive and
nontransferable, fully-paid, right and license, exercisable at B&T's operational
site(s), to: (i) use the Developed Applications, in object code form, as part of
B&T's physician practice management services which are offered to the Physician
Groups; and (ii) use the Work Product (excluding the Developed Applications)
delivered to B&T hereunder in conjunction with the operations of B&T's physician
practice management services.  B&T shall not use, sublicense or otherwise
distribute the Work Product, including the Developed Applications, in any other
manner except as expressly stated herein. Notwithstanding the foregoing, nothing
herein shall be construed so as to limit or interfere with B&T's ability to use
the Developed Applications as part of the B&T Service to be offered to Physician
Groups, and to enable access and use by End Users in conjunction with the B&T
Service.

     5.2    OPTION TO LICENSE HEALTHEON PLATFORM SOFTWARE. Healtheon hereby 
agrees to grant to B&T a nonexclusive and nontransferable, right and license, 
exercisable at B&T's operational site(s), to use the Healtheon Platform 
Software as part of the Healtheon Platform to be deployed at B&T's primary 
operational site(s) to run the Developed Applications (and any Additional 
Applications which may be licensed from Healtheon), as part of the B&T 
Service to be offered to Physician Groups, and to enable access and use by 
End Users in conjunction with the B&T Service. The applicable one-time, 
up-front fees for such license(s) shall be [*] net of any third-party royalty 
obligations.  B&T shall not have the right to use, sublicense or otherwise 
distribute the Healtheon Platform Software in any other manner except as 
expressly stated herein. Notwithstanding the foregoing, nothing herein shall 
be construed so as to limit or interfere with B&T's ability to use the 
Developed Applications (and any Additional Applications which may be licensed 
from Healtheon) as part of the B&T Service to be offered to Physician Groups, 
and to enable access and use by End Users in conjunction with the B&T 
Service.  B&T shall be solely responsible for the costs associated with 
acquiring all third-party hardware and software and implementation services 
necessary to deploy the Healtheon Platform at B&T's sites.

     5.3    OPTION TO LICENSE ADDITIONAL APPLICATIONS. Healtheon hereby agrees
to grant to B&T a nonexclusive and nontransferable, right and license,
exercisable at B&T's primary operational site(s), to use the Additional
Applications as may be licensed at the option of B&T, as part of the B&T Service
to be offered to Physician Groups, and to enable access to End Users in
conjunction with the B&T Service.

[*] CONFIDENTIAL TREATMENT REQUESTED

                                         -3-
<PAGE>

The one-time up-front fee(s) for such license(s) shall be [*] to each such 
Additional Application as may be licensed by B&T, net of any third-party 
royalty obligations.  B&T shall not use, sublicense or otherwise distribute 
the Additional Applications in any other manner except as expressly stated 
herein. Notwithstanding the foregoing, nothing herein shall be construed so 
as to limit or interfere with B&T's ability to use the Additional 
Applications which may be licensed from Healtheon as part of the B&T Service 
to be offered to Physician Groups, and to enable access and use by End Users 
in conjunction with the B&T Service.

     5.4    OPTION TO USE HEALTHEON SERVICE.  If, following the completion of
the Developed Applications, B&T does not elect to exercise its license rights
under Section 5.1, Healtheon hereby agrees to enter into a Healtheon Service
Agreement with B&T whereby Healtheon shall provide B&T and its Physician Groups
with access to an on-line service which includes the Developed Applications.
Healtheon shall offer such service to B&T and its Physician Groups at [*].

6.   THIRD-PARTY TECHNOLOGY AND LICENSE RIGHTS

     6.1    THIRD-PARTY TECHNOLOGY AND LICENSE RIGHTS.  In order to perform the
Services and/or Development Work contemplated hereunder, Healtheon may need to
have access to the third-party technology and software listed on Exhibit C (the
"Third-Party Technology and Software") which is licensed and/or deployed by B&T.
B&T hereby agrees to use its best efforts to obtain, at its own expense, all
necessary consents, licenses and/or assignment which may be necessary in order
for Healtheon to perform the Services and/or Development Work, as contemplated
hereunder.  In the event that B&T fails to obtain any such necessary consent,
license or assignment, B&T shall promptly notify Healtheon in writing and the
parties will work together to attempt to find a reasonable accommodation to
allow Healtheon to proceed with the work contemplated hereunder without
violating any third party rights.  In the event that the parties cannot find a
reasonable accommodation, neither party shall have any obligation to proceed
with any work which would infringe any third-party proprietary rights.
Healtheon shall use reasonable efforts to cooperate with B&T to assist B&T in
obtain any necessary consents, licenses and/or assignments.

     6.2    B&T TECHNOLOGY AND LICENSE RIGHTS.  B&T hereby grants to Healtheon
a right and license to use, modify and copy all technology and software owned by
B&T which is necessary for Healtheon to perform its obligations hereunder.

7.   FEES AND PAYMENT

     7.1    FEES AND EXPENSES, PAYMENT. B&T shall pay Healtheon the Fees and
Expenses, as set forth in Exhibit D for the Services and the Development Work to
be performed hereunder (the "Fees").  Healtheon shall submit invoices to B&T on
a monthly basis for the Fees when due. Invoices shall be due and payable within
ten (10) days after receipt.  The Fees may be changed with the written consent
of the parties.

     7.2    OTHER EXPENSES. Healtheon shall have sole responsibility for
payment of compensation to its personnel and shall pay and report, for all
personnel assigned to perform services hereunder, federal and state income tax
withholding, social security taxes, and unemployment insurance applicable to
such personnel. Healtheon shall bear sole responsibility for any health or
disability insurance, retirement benefits, or other welfare or pension benefits
(if any) to which its own personnel may be entitled.

[*] CONFIDENTIAL TREATMENT REQUESTED

                                         -4-
<PAGE>

     7.3    THIRD-PARTY HARDWARE AND SOFTWARE.  In the event that it is
reasonably necessary for Healtheon to purchase or license any third-party
hardware and/or software in order to perform the Services and/or the Development
Work, the Management Board shall determine whether such third-party hardware
and/or software should be purchased and/or licensed by B&T or Healtheon and how
the cost shall be allocated between the parties.

     7.4    TAXES.  All Fees and payments are exclusive of all taxes, duties or
levies, however designated or computed.  B&T shall be responsible for and pay
all taxes upon payments due under this Agreement including, but not limited to,
sales, use, or value-added taxes, duties, withholding taxes and other
assessments now or hereafter imposed on or in connection with this Agreement,
exclusive of taxes based upon Healtheon's net income, except as noted in Section
7.2.

8.   CONFIDENTIALITY

     8.1    CONFIDENTIAL INFORMATION.  The parties acknowledge that in the
course of performing under this Agreement, each party may be exposed to or
acquire information which is proprietary to or confidential to the other party,
its suppliers or customers. Any and all such information of one party in any
form obtained by the other party or its employees, agents, or representatives in
the performance of this Agreement shall be deemed to be confidential and
proprietary information of such party. The parties agree to hold such
information in strict confidence, to only permit use of such information by its
employees and agents having a need to know in connection with performance under
this Agreement, and not to copy, reproduce, sell, assign, license, market,
transfer, give or otherwise disclose the confidential information of the other
party to third parties or to use such information for any purposes whatsoever,
without the express written permission of the other party and to advise each of
their employees, agents, and representatives of their obligations to keep such
information confidential. All such confidential and proprietary information
described herein in whatever form, including but not limited to the Work
Product, is hereinafter collectively referred to as "Confidential Information."
Work Product shall be deemed to be the Confidential Information of Healtheon.
B&T hereby agrees that it will not disclose any Confidential Information of
Healtheon to any person or entity who is not an employee of B&T, without
Healtheon's prior written consent and subject to such third party entering into
a confidentiality agreement with Healtheon in a form acceptable to Healtheon.

     8.2    EXCEPTIONS TO CONFIDENTIAL INFORMATION.  Notwithstanding the
obligations set forth in Section 8.1 above, the confidentiality obligations of
Healtheon and B&T shall not extend to information that (i) was, as of the time
of its disclosure, or thereafter becomes part of the public domain through a
source other than receiving party; (ii) the receiving party can demonstrate was
known to the receiving party as of the time of its disclosure; (iii) the
receiving party can demonstrate was independently developed by the receiving
party without use of the Confidential Information; or (iv) the receiving party
can demonstrate was subsequently learned from a third party not under a
confidentiality obligation to the providing party.  In the event that a
receiving party is required to disclose certain Confidential Information of a
disclosing party pursuant to court order or government authority, the receiving
party shall provide reasonable notice to the disclosing party prior to such
disclosure and shall cooperate with the disclosing party to obtain protection
from such disclosure.

9.   REPRESENTATIONS AND WARRANTIES

     9.1    WARRANTIES FOR SERVICES AND THE DEVELOPMENT WORK. Healtheon hereby
represents and warrants that (i) each person assigned to perform the Services
and/or the Development Work shall have

                                         -5-
<PAGE>

the proper skill, training and background so as to be able to perform the such
Services and/or  Development Work in a competent and professional manner and
(ii) all Services and/or Development Work and any work product and other
materials or documentation delivered under this Agreement shall have been
completed in a thorough and professional manner.  In the event of a breach of
Healtheon's representations and warranties under this Section 9.1, Healtheon's
sole obligation shall be to promptly correct any defects identified by B&T,
provided that B&T provides Healtheon with written notice within thirty (30) days
of becoming aware of the defective work.

     9.2    THIRD-PARTY TECHNOLOGY.  B&T hereby represents and warrants that it
will use its best effort to obtain all necessary consents, licenses and/or
assignments with respect to the third-party technology software which is
licensed and/or deployed by B&T and which are necessary in order for Healtheon
to perform the Services and Development Work to be performed hereunder.  In the
event that B&T has failed to obtain any necessary consent, license or
assignment, B&T shall have notified Healtheon in writing.

     9.3    AUTHORITY.  Healtheon and B&T each hereby represents and warrants
to the other that it is duly organized and validly existing under the laws of
the jurisdiction in which it is organized, in good standing therein, and has the
power to enter into this Agreement and to perform its obligations hereunder and,
furthermore, that the performance by it of its obligations under this Agreement
has been duly authorized by all necessary corporate or other action and will not
violate any provision of law or regulation or of any corporate charter or
bylaws.

     9.4    NO IMPLIED WARRANTIES.  THE WARRANTIES STATED ABOVE IN THIS SECTION
9 ARE THE ONLY WARRANTIES MADE BY EITHER PARTY. HEALTHEON DOES NOT MAKE AND
HEREBY DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT
LIMITED TO, WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
B&T ACKNOWLEDGES THAT COMPLEX COMPUTER SOFTWARE AND SERVICES, SUCH AS THE
DEVELOPED APPLICATIONS AND THE SERVICES, ARE RARELY FREE OF DEFECTS OR ERRORS
AND HEALTHEON DOES NOT WARRANT THE SAME.

10.  LIMITATION OF LIABILITY

     10.1   EXCLUSION OF CERTAIN DAMAGES. [*] UNDER NO CIRCUMSTANCES AND 
UNDER NO LEGAL THEORY SHALL EITHER PARTY HAVE ANY LIABILITY FOR LOSS OF 
PROFITS, CONSEQUENTIAL, EXEMPLARY, INCIDENTAL OR PUNITIVE DAMAGES, EVEN IF 
SUCH PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

     10.2   LIMITATION OF LIABILITY.  [*] IN NO EVENT SHALL EITHER PARTY'S 
AGGREGATE LIABILITY FOR ANY MATTER ARISING OUT OF THE SUBJECT MATTER OF THIS 
AGREEMENT, WHETHER IN CONTRACT, TORT OR OTHERWISE, EXCEED THE AMOUNT OF THE 
FEES PAID FOR THE PARTICULAR SERVICES OR DEVELOPMENT WORK WHICH GAVE RISE TO 
SUCH CLAIM UNDER THIS AGREEMENT. The remedies provided herein are the 
parties' sole and exclusive remedies.

[*] CONFIDENTIAL TREATMENT REQUESTED

                                         -6-
<PAGE>

11.  INDEMNIFICATION

     11.1   INDEMNIFICATION.  Healtheon agrees to hold harmless and defend B&T
from and against any and all claims, actions, or proceedings, arising out of any
actual or alleged infringement by Healtheon of any copyright or any U.S. patent,
trademark, or trade secret right or other proprietary right, with respect to the
Work Product, as delivered by Healtheon hereunder and used by B&T in accordance
with the terms of this Agreement.  B&T agrees to hold harmless and defend
Healtheon from and against any and all claims, actions, or proceedings, arising
out of any actual or alleged infringement by Healtheon of any copyright or any
U.S. patent, trademark, or trade secret right or other proprietary right which
arises out of B&T's failure to obtain any necessary consents, licenses, or
assignments with respect to any third-party technology or software which has
been licensed and/or deployed by B&T and which is necessary in order for
Healtheon to perform its obligations hereunder ("B&T Third-Party Technology
Rights").

     11.2   LIMITATIONS.  Healtheon shall have no indemnity obligation for
claims resulting from or alleged to result from (i) development work performed
by Healtheon in compliance with B&T's specifications where Healtheon's method of
compliance has been compelled by the terms of B&T's specifications; or (ii)
B&T's use of the Work Product in combination with any hardware or software not
furnished by or authorized by Healtheon hereunder, if such combination is the
cause of such claim, or any modifications which have been made by B&T.  In
addition, Healtheon shall have no indemnity obligation for claims of
infringement resulting or alleged to result from B&T's failure within a
reasonable time frame to implement any replacement or modification which
conforms to the requirements of Section 11.4 herein. B&T shall have no indemnity
obligations for claims resulting from or alleged to result from Healtheon's
breach of any B&T Third-Party Technology Rights where appropriate consents,
licenses and/or assignments were obtained and Healtheon failed to adhere to the
terms of applicable consents, licenses and/or assignments.

     11.3   PAYMENT AND COOPERATION. Subject to the limitations set forth in
Section 11.2 above, the Indemnifying Party shall pay all damages settlements,
expenses, costs and reasonable attorney's fees, incurred by the Indemnified
Party arising out of the matters set forth in Section 11.1 provided that such
payment shall be contingent on: (i) prompt notice to the Indemnifying Party in
writing of such claim to enable it to defend or mitigate the same; (ii)
cooperation by the Indemnified Party with the Indemnifying Party in the defense
and or settlement thereof, at the Indemnifying Party's  expense; and (iii)
allowing the Indemnifying Party to control the defense and all related
settlement negotiations.

     11.4   REMEDY.  If, in the event of an infringement action pertaining to
the Work Product and B&T's use of the Work Product is disrupted, Healtheon
shall, at its option, (i) provide B&T with access to software which is
functionally equivalent to the infringing elements of the Work Product, without
additional charge; (ii) modify the infringing portions of the Work Product to
avoid the infringement; or (iii) obtain a license for B&T to continue use of the
Work Product for the term of this Agreement and pay for any additional fee
required for such license, subject to B&T's approval, which shall not be
unreasonably withheld.

     11.5   LIMITATIONS.  SECTION 11 SETS FORTH THE PARTIES' SOLE OBLIGATION,
AND THE SOLE RECOURSE AGAINST THE OTHER PARTY IN THE EVENT OF ANY CLAIM OF
INFRINGEMENT OF THIRD PARTY  INTELLECTUAL PROPERTY RIGHTS.

                                         -7-
<PAGE>

12.  TERM AND TERMINATION

     12.1.  TERM.  This Agreement shall continue for a fixed term of three (3)
years from the date hereof unless terminated earlier under the provisions of
this Section 12 or by the mutual written agreement of the parties.
Notwithstanding the foregoing, the licenses granted in Section 5.1 shall
continue for a term of [*] from the Effective Date and shall renew
automatically for successive additional [*] terms unless terminated earlier
pursuant to Section 12.3 or 12.4, or by the mutual written consent of the
parties.

     12.2   TERMINATION FOR CONVENIENCE. Either party may terminate this
Agreement upon one hundred twenty days (120) prior written notice to the other
for any reason.

     12.3   TERMINATION BY EITHER PARTY FOR DEFAULT.  If either party defaults
in the performance of any material provision of this Agreement, then the
non-defaulting party may give written notice to the defaulting party that if the
default is not cured within thirty (30) days of such notice the Agreement will
be terminated.  If the non-defaulting party gives such notice and the default is
not cured during the thirty (30) day period, then the Agreement shall
automatically terminate at the end of that period.

     12.4   INSOLVENCY.  Either party may terminate this Agreement by written
notice to the other, and may regard the defaulting party as in default of this
Agreement, if the defaulting party becomes insolvent, makes a general assignment
for the benefit of creditors, suffers or permits the appointment of a receiver
for its business or assets, becomes subject to any proceeding under any
bankruptcy or insolvency law whether domestic or foreign, or has wound up or
liquidated, voluntarily or otherwise.

     12.5   EFFECT OF TERMINATION. The provisions of Sections 7(with respect to
Fees and other payments which were due and payable as of the date of
termination), 4, 8, 10, 11, and 13 (to the extent applicable) shall survive the
termination of this Agreement for any reason.  All other rights and obligations
of the parties shall cease upon termination of this Agreement.  In the event of
a termination, neither party shall be entitled to any refund of the fees paid or
cost incurred for the development performed hereunder. Provided that this
Agreement is not terminated pursuant to Section 12.4 pursuant to B&T's
insolvency, upon termination, Healtheon shall deliver to B&T a copy of (i) each
Developed Application which has been completed as of the date of termination, in
object code form, and the related user documentation, and (ii) all portions of
Developed Applications which were under development but not yet completed as of
the date of termination, in object code form, and the related user
documentation, if any.  Materials delivered pursuant to Section 12.5(ii) shall
be delivered on an "as-is" basis.

     12.6   RETURN OF MATERIALS. Within thirty (30) days after the termination
of this Agreement, each party shall return to the other, all Confidential
Information, and other material of any kind which is the property of the other
party.

13.  GENERAL

     13.1   NO EXCLUSIVITY OR RESTRICTION ON OTHER ACTIVITY.  Except as
expressly set forth in this Agreement, nothing herein shall preclude either
party from entering into agreements to obtain similar services or development
work from third parties or from providing similar services or development work
to third parties.

[*] CONFIDENTIAL TREATMENT REQUESTED


                                         -8-
<PAGE>

     13.2   RELATIONSHIP OF PARTIES.  The relationship of the parties shall be
that of independent contractors. Neither party will represent that it has any
authority to assume or create any obligation, express or implied, on behalf of
the other party, or to represent the other party as agent, employee, or in any
other capacity, except as specifically provided herein.

     13.3   BINDING EFFECT; ASSIGNMENT.  This Agreement shall be binding on and
inure to the benefit of the respective parties and their permitted successors
and assigns. Neither party shall not transfer, assign, sublicense or subcontract
any right or obligation hereunder, except as expressly provided herein.

     13.4   NO WAIVER.  Either party's failure to exercise any right under this
Agreement shall not constitute a waiver of any other terms or conditions of this
Agreement with respect to any other or subsequent breach, nor a waiver by such
party of its right at any time thereafter to require exact and strict compliance
with the terms of this Agreement.

     13.5   NOTICES.  All notices or other communications which are required or
permitted to be given hereunder shall be in writing and shall be sent to the
address of the recipient set forth below or such other address as the recipient
may designate by notice given in accordance with the provisions of this Section
with copies to:

In the case of Healtheon:               In the case of B&T:

     Healtheon Corporation              Brown & Toland
     87 Encina Avenue                   1388 Sutter Street, Suite 400
     Palo Alto, California 94302        San Francisco, CA 94109
     Attn: President                    Attn: President
     Copy to: General Counsel           Copy to: General Counsel

Any such notice shall be delivered by either (i) first class registered or
certified airmail, postage prepaid, and shall be deemed to have been served
forty-eight (48) hours after posting; or (ii) express courier service, service
fee prepaid, and shall be effective upon delivery.

     13.6   APPLICABLE LAW.  This Agreement shall be governed by and construed
in accordance with the laws of the State of California.

     13.7   SEVERABILITY.  The invalidity of one or more phrases, sentences,
clauses or articles contained in this Agreement shall not affect the remaining
portions of this Agreement or any part thereof; and in the event that one or
more phrases, sentences, clauses or articles shall be declared void or
unenforceable this Agreement shall be amended to include only such portions of
such phrases, sentences, clauses or articles that are not invalid, void or
unenforceable.

     13.8   ENTIRE AGREEMENT; AMENDMENTS.  This Agreement, along with the
Exhibits attached hereto, sets forth the entire agreement between the parties
and supersedes any other prior proposals, agreements and representations between
them related to its subject matter, whether written or oral.  No modifications
or amendments to this Agreement shall be binding upon the parties unless made in
writing and duly executed by authorized officials of both parties.


                                         -9-
<PAGE>


IN WITNESS WHEREOF, the parties have caused this Agreement to be duly executed
as of the day and year first written above.


       Healtheon Corporation                 Brown & Toland Physician
                                             Services Organization



By: /s/                                    By: /s/
   ---------------------------------          -------------------------------

Title: President and CEO                   Title: President
      ------------------------------             ----------------------------

Date:                                      Date:
      ------------------------------             ----------------------------


                                         -10-
<PAGE>


                                     EXHIBIT A

                                    B&T SERVICE

"B & T Services" shall mean B & T's physician practice, physician group
practice, and IPA management services which include, but not be limited to, the
following services:

- -    Claims processing, adjudication, eligibility, and encounter data
- -    Risk pool management
- -    Utilization management
- -    Authorization and referral management
- -    Care management including inpatient and outpatient case management
- -    Inpatient physician program management
- -    Disease management and wellness programs
- -    Provider credentialling
- -    Health plan member marketing
- -    Provider relations
- -    Health plan and provider contracting
- -    Quality management
- -    Practice management including office management, billing and collections
- -    Financial services including accounting, audit, budget, financial
     reporting, and taxes
- -    Medical group and IPA administration
- -    Capitation management
- -    Health Plan Member services

which are offered to "Physician Groups.


                                         -11-
<PAGE>


                                     EXHIBIT B

                                      SERVICES


- -    Operate, maintain and enhance B&T applications
- -    Operate and maintain B&T hardware and software infrastructure, network and
     desktop environment
- -    Provide technical support to internal and external B&T users
- -    Provide support for B&T new site implementations
       -    project planning and management
       -    solution design
       -    installation of hardware and software
       -    user technical support and training


                                         -12-
<PAGE>

                                      EXHIBIT C

                         Third-Party Technology and Software


                                         -13-
<PAGE>


                                     EXHIBIT D

                                 FEES AND EXPENSES


1.   Fee and Expenses for Services

B&T will pay [*] of all "cost" (as defined below) incurred by Healtheon in
performing the Services.

2.   Fee and Expenses for Development Work

B&T will pay [*] of all "cost" (as defined below) incurred by Healtheon in
performing the Development Work.


DEFINITION OF COST

Cost will include Healtheon's "fully loaded" cost (which include payroll,
benefit, support services, corporate overhead and other appropriate expenses)
for all full time employees assigned to the BTH Division, and all direct
expenses (consultants, contractors, recruiting expenses and fees, outside
services, travel, etc.).  For Healtheon's employees that are not assigned full
time to the Division, they will charged their time performing or supporting the
Services based on a set rate, which is subject to change based on the cost
structure of Healtheon.  The initial rates are:-

Level 1   [*] per hour
Level 2   [*] per hour
Level 3   [*] per hour

For Healtheon's employees that are not involved in this project, they will
charge their time providing short term consulting services to this project or
B&T based on [*].  The current rates are :-

Level 1   [*] per hour
Level 2   [*] per hour
Level 3   [*] per hour

Cost for additional capital equipment or computer processing needed to perform
the Services or Development Work will be paid by B&T.

[*] CONFIDENTIAL TREATMENT REQUESTED

                                         -14-


<PAGE>

                                                      EXHIBIT 10.27

July 2, 1997



PERSONAL AND CONFIDENTIAL
- -------------------------

Mike Long
3 Stegner Lane
Austin, Texas 78746

Dear Mike:

     The Board of Directors of the Company has approved an agreement for your 
services upon the terms set forth in this offer.  On behalf of the Board of 
Directors, I am pleased to submit to you the following offer:

     1.    TITLE AND POSITION.  You will have the position of President and 
Chief Executive Officer and you will report to the Board of Directors.  We 
will elect you to the Board of Directors promptly upon your acceptance of 
this offer; and, upon your request, you will be elected as Chairman of the 
Board.  The position shall be located at the offices of the Company, except 
as travel to other locations may be necessary to fulfill your 
responsibilities.

     2.    DUTIES AND OBLIGATIONS.  During your employment, you shall devote 
your full time, interest and effort to the performance of the duties of the 
position.

     3.    COMMENCEMENT.  It is anticipated that you will commence employment 
no later than July __, 1997.

     4.    COMPENSATION AND BENEFITS.

           (a)   SALARY.  The Company shall pay you for all services to be 
performed by you at a monthly salary of $ 41,667, adjusted as provided in 
Section 4(g) below, payable in periodic semi-monthly installments according 
to the Company's practice, subject to any applicable withholding taxes. Your 
base salary will be reviewed on an annual basis by the Board of Directors or 
its Compensation Committee.  The first such review will occur no later than 
February, 1999.

           (b)   STOCK PURCHASE RIGHT.  At the Company's Board of Directors 
meeting following the start of your employment, the Board will grant you a 
stock award to purchase two million five hundred thousand (2,500,000) shares 
of the Company Common Stock under the Company's 1996 Stock Plan (the 
"Shares").  The purchase and/or exercise price for this right will be the 
then-current fair market value of the Company Common Stock at the date of 
grant or such other price as is consistent

<PAGE>

with the terms of the Company's 1996 Stock Plan. The vesting of the options 
to purchase Shares (and the lapsing of the Company's repurchase right, in the 
case of Shares purchased pursuant to a "restricted stock purchase agreement) 
will commence on the date of your full time employment with the Company.  In 
the case of an option(s), twenty-five percent (25%) of the options to 
purchase Shares will be fully vested upon the date of grant, Shares issued 
pursuant to any options will not be subject to any right of repurchase, other 
than the right of first refusal as provided under the terms of the 1996 Stock 
Plan and/or the agreements issued thereunder. In the case of Shares purchased 
pursuant to a restricted stock agreement, 625,000 Shares will not be subject 
to any right of repurchase (other than the right of first refusal, as 
provided under the terms of the 1996 Stock Plan and/or the agreements issued 
thereunder).  The balance of the options to purchase Shares will begin 
vesting and/or the repurchase right will lapse, in the case of a restricted 
stock purchase agreement, one (1) year after your start date at the rate of 
1/36th of the aggregate number of options to purchase Shares (or Shares in 
the case of a restricted stock purchase) per month at the close of each month 
while you remain employed with the Company, over the remainder of the four 
(4) year vesting term.  Upon the fourth anniversary of your start date, all 
of the options to purchase Shares shall be fully vested and, in the case of a 
restricted stock purchase, the Company's repurchase right will have lapsed in 
its entirety.

     The Board will respect your decision as to what portion of the Shares you
wish to obtain in the form of: (i) an immediate purchase, subject to the 
Company's right of repurchase which lapses over time, with the right to make 
an election under Section 83 (b) of the Internal Revenue Code; (ii) an 
Incentive Stock Option, subject to the applicable rules and limitations under 
the Internal Revenue Code; and (iii) a Non-Qualified Option. An attorney from 
the Company's outside law firm of Wilson, Sonsini will be available to assist 
you in evaluating the tax benefits of these different stock and option 
programs.  You have indicated that you want the above option in the form of 
an Incentive Stock Option to the extent of the annual limitation contained in 
section 422(d) of the Code, and to the extent the options exceed such limit 
in a calendar year the excess will be a Non-Qualified Option and subject to 
all terms of Non-Qualified Options, including price and time of exercise.  
The Company will cooperate with you in this allocation.  Your stock award 
will be evidenced by Stock Option Agreement(s) (and/or a Restricted Stock 
Purchase Agreement, in the event that you decide to have a portion of your 
stock grant pursuant to a restricted stock purchase arrangement) subject to 
the terms of the Company's 1996 Stock Plan and consistent with the forms of 
agreements issued under the Company's 1996 Stock Plan. The terms of the Stock 
Option agreements shall be amended by the Board at such meeting to provide 
that Stock Option Agreements issued under the 1996 Stock Plan shall be 
exercisable for a period of ninety (90) days following the date of 
termination of employment rather than the Company's current thirty (30) day 
period.   The terms of these agreements permit you to transfer the Shares 
which are not subject to a repurchase right or for which such right has 
lapsed, to a trust for the benefit of your immediate family or to a member of 
your immediate family.  You shall have the right to exercise your options for 
any consideration which is permissible under the terms of the 1996 Stock 
Plan, including for shares of the Company's stock.

           (c)   ADDITIONAL STOCK PURCHASE RIGHT.  The Company has granted you 
the right to purchase up to one million (1,000,000) shares of the Company's 
Series B Preferred Stock (the "Series B Shares") and upon such purchase you 
shall become a party to the Company's Investors' Rights Agreement which shall 
grant you registration rights with respect to your Series B Shares.  The

                                       2
<PAGE>

purchase price for such shares will be two dollars ($2.00) per share.  The 
Company shall allow you to purchase two hundred and fifty thousand (250,000) 
of the Series B Shares, on the same terms and conditions as the Company's 
Series B investors, in exchange for a non-interest bearing promissory note 
payable in twelve (12) equal monthly installments.  The Company shall apply 
the net amount of your compensation pursuant to Section 4(a) above to the 
payment of this Note and you shall pay the balance of any monthly 
installments to the Company.  The Note shall be in a form and on terms which 
are acceptable to the Company and to you. The Company shall allow you to 
purchase seven hundred and fifty thousand (750,000) shares of the Series B 
Shares (the "Restricted Series B Shares") pursuant to, at your option: (i) 
a restricted stock purchase agreement in consideration for a full recourse 
note which is adequately secured by the collateral of your choice, which may 
include the Series B Shares; or (ii) a warrant with an exercise price of two 
dollars ($2.00) per share and a term of three (3) years.  At your option, 
following the first anniversary of your employment with the Company, the 
second note can be repaid or the warrant can be exercised in periodic 
installments by applying your net compensation to make periodic payments to 
such Note or exercises of the Warrant, in accordance with terms and 
conditions which are acceptable to you and the Company.  The Restricted 
Series B Shares will be subject to the Company's assignable repurchase right 
which shall lapse with respect to 1/24th of the Restricted Series B Shares 
per month during the period in which you continue to be employed by the 
Company, commencing upon the start date of your employment.  In the event 
that that your employment is terminated for any reason, the note shall become 
due and payable. The Company's outside counsel shall be made available to 
discuss with you the legal and tax issues with respect to these options in 
order to assist you in deciding which option to select.

           (d)   BENEFITS.  Commencing with full time employment, you will be 
entitled to all medical, life insurance, disability insurance and other 
benefits as are provided to the Company's employees.  Medical benefits will 
provide coverage with health care providers located in Austin, Texas.  In 
your position, we would expect you to review and design the Company's 
benefits packages.

           (e)   BUSINESS EXPENSES.  The Company will reimburse you for all 
reasonable business expenses incurred on behalf of the Company upon 
submission of appropriate documentation in accordance with the Company's 
general policies, as they may be amended from time to time during the course 
of your employment.

           (f)   MOVING EXPENSES.  The Company acknowledges that neither you 
nor your family will be able to move to the San Francisco Bay area at any 
time prior to June 1998.  Notwithstanding the foregoing, the Company will 
reimburse you for your reasonable and customary moving expenses incurred with 
respect to your move to the San Francisco bay area whether prior to June 1998 
or otherwise.  You agree that you will repay such reimbursed expenses in the 
event that you voluntarily terminate your employment prior to the one (1) 
year anniversary date of your family's move to California.

           (g)   LIVING AND COMMUTING EXPENSES.  The Company will pay all of 
the reasonable and customary living expenses incurred with respect to your 
living accommodations in the San Francisco bay area, including housing, meals 
and automobile expenses. The Company will also pay all commuting expenses for 
weekend trips to visit your family in Austin, Texas.  In the event any of the 

                                       3

<PAGE>

expenses advanced under this provision result in additional taxable income to 
you, the Company will "gross up" your salary to compensate you for additional 
state and Federal taxes and taxes on the increased salary.

           (h)   83(b) ELECTION.  With respect to any Shares issued pursuant 
to this letter, to the extent allowable by law, upon your request, the 
Company will assist you in preparing an election under section 83(b) of the 
Internal Revenue Code of 1986.

     5.    CHANGE OF CONTROL.  In the event that the Company is acquired by 
or merged into another company, if you are not offered a position with 
similar responsibility in the surviving company and if you decide to 
voluntarily terminate your employment with Healtheon at any time prior to the 
effective time of any such merger or acquisition, options to purchase 625,000 
Shares shall immediately vest or in the case of Shares subject to repurchase, 
the Company will waive the Company's right of repurchase with respect to an 
aggregate of 625,000 of the Shares, and 500,000 of the Restricted Series B 
Shares. This provision shall not be applicable in the event of your 
termination for any reason other than in connection with a change of control 
and this waiver and/or vesting shall be in addition to any Shares or options 
to purchase Shares which have already vested and/or the Company's repurchase 
right has lapsed.

     6.    EMPLOYMENT RELATIONSHIP.  Should you decide to accept our offer, 
you will be an at-will employee of the Company, which means the employment 
relationship can be terminated by either of us for any reason at any time.  
Further, your participation in any stock incentive or benefit program is not 
to be regarded as assuring you of continuing employment for any particular 
period of time.  However, in the event of the Company's termination of your 
employment without cause, you would receive six (6) months base salary, 
payable in semi-monthly installments and options to purchase 625,000 Shares
would immediately vest and the Company would waive the Company's right of 
repurchase with respect to 625,000 of the Shares (if Shares are issued 
subject to a repurchase right) and 500,000 of the Restricted Series B Shares. 
 This vesting and waiver shall be in addition to any options and/or Shares 
which have already vested and/or the Company's repurchase right has lapsed. 
Any assignment of the Company's Repurchase rights shall be subject to the 
waivers of such rights described in Sections 5 and 6 so that all assignees 
shall be bound by such waivers.  For purposes of this Agreement, the term 
"cause" shall mean (i) willful and repeated failure to comply with the 
lawful directions of the Board of Directors, (ii) gross negligence or willful 
misconduct in the performance of duties to the Company, (iii) commission of 
any act of fraud with respect to the Company, or (iv) conviction of a felony 
or a crime causing material harm to the standing and reputation of the 
Company, in each case as determined in good faith by the Board of Directors. 
The number of Shares and Restricted Shares shall be subject to adjustment, in 
accordance with the terms of the Company's 1996 Stock Plan and/or Certificate 
of Incorporation, as applicable, in the event of certain "dilutive" 
issuances of stock and the Share and Restricted Share numbers set forth 
herein and in Sections 4 and 5, above shall be adjusted accordingly in the 
event of any such "dilutive" stock issuance.

     7.    PROPRIETARY INFORMATION.  As an employee of the Company, you will 
have access to Company confidential information and you may during the course 
of your employment develop certain information or inventions which will be 
the Company's property.  As a condition of your employment,

                                       4

<PAGE>

you will be required to enter into the Company's Employee Inventions and 
Confidentiality Agreement. This agreement exists to assure the Company and 
its investors that the Company's valuable intellectual property is protected. 
 We wish to impress upon you that we do not want you to bring with you any 
confidential or proprietary material of any former employer or third party or 
to violate any other obligation which you may have to any of your former 
employers or any third parties.

     8.    ENTIRE AGREEMENT.  This Letter Agreement sets forth the entire 
understanding of the parties and supersedes all prior agreements, 
arrangements, and communications, whether oral or written, between the 
parties, including all prior employment agreements.  No amendment to this 
Letter Agreement may be made except by a writing signed by the Company and 
you.

If you find this offer acceptable, please sign the enclosed copy of this 
letter in the space indicated and return it to us.


                                            Very truly yours,

                                            __________________________________ 
                                                        John Doerr
                                            On behalf of the Board of Directors 
                                                    Healtheon Corporation

Accepted and Agreed:

______________________________

Dated: _______________________

                                       5


<PAGE>

                            EMPLOYMENT AGREEMENT


     THE AGREEMENT, entered into as of this 23rd day of September, 1992, by 
and between ACTAMED CORP., a Georgia corporation (the "Company") and 
MICHAEL K. HOOVER ("Employee").


                             W I T N E S S E T H :

     WHEREAS, the Company and Employee desire to enter into an employment 
agreement on the terms stated herein;

     NOW, THEREFORE, in consideration of the mutual promises contained 
herein, the parties hereto agree as follows:

     1.  DEFINITIONS.  For purposes of this Agreement the following 
capitalized terms shall have the definition set forth below.

         (a)  "CAUSE" means:

                (i)  conviction of Employee of a felony; or

               (ii)  Employee's use of alcohol or drugs to an extent that 
     materially interferes with Employee's performance of his duties or 
     employment; or

              (iii)  Employee has engaged in fraud, misappropriation, 
     embezzlement, or other acts involving moral turpitude; or

               (iv)  Employee has committed a willful act of dishonesty in 
     the course of his duties which injures the Company; or

                (v)  Employee has repeatedly disregarded policy directives 
     from the Company's Chief Executive Officer, President or Board of 
     Directors; or

               (vi)  Employee violates his covenants under paragraph 7(a) or 
     breaches the nondisclosure agreement executed pursuant to paragraph 6.

         (b)  "DISABILITY" means incapacity due to physical or mental illness 
or injury that is permanent in nature and prevents Employee from performing 
the substantial and material duties of his employment hereunder. Any such 
disability shall be deemed to be permanent in nature if any physician 
designated by the Company certifies in writing to the Company that such 
disability can be expected to last for a period of at least six (6) 
continuous months.

    2.   EMPLOYMENT AND DUTIES.  Employee shall perform such duties and 
responsibilities as are assigned to him from time to time by the Chairman of 
the Board of the Company. Employee agrees that during the term of his 
employment, he will devote his full


<PAGE>

productive time to the Company, not work for anyone else, or engage in any 
activity in competition with or detrimental to the Company; provided, 
however, that Employee at the direction of the Chairman of the Board of the 
Company shall perform duties and services for Actamed Development Corp.

     3.  BASE COMPENSATION.

         (a)  In consideration of the services rendered by Employee, the 
Company will pay Employee during the term of this Agreement an annual base 
salary of $85,000.00 or such other amount as determined from time to time by 
the Board of Directors of the Company ("Base Compensation"). Such Base 
Compensation shall be payable in accordance with the regular payroll 
practices of the Company.

         (b)  The Company's Board of Directors may review the then-current 
level of Employee's annual base salary for potential adjustment and shall 
advise Employee, in writing, of such adjustment, if any, or may state, in 
writing, that no adjustment will be made.

     4.  STOCK OPTIONS.  Simultaneously with the execution of this Agreement, 
Employee will be granted an option to purchase 10,000 shares of Company 
common stock pursuant to that certain Nonstatutory Stock Option Agreement of 
even date herewith between the Company and Employee (the "Option Agreement").

     5.  TERM AND SEVERANCE PAY.

         (a)  Employee's employment hereunder shall be effective as of the 
date of this Agreement and shall continue in force until terminated as set 
forth in paragraph 5(b) below.

         (b)  Employee's employment hereunder may be terminated only:

                (i)  by mutual agreement of the Company and Employee;

               (ii)  by the Company immediately for Cause;

              (iii)  by Employee, upon not less than ninety (90) days prior 
     written notice to the Company;

               (iv)  by the Company without Cause or without any reason upon 
     not less than ninety (90) days prior written notice; provided, however, 
     that the Company may, at its option, terminate Employee prior to the 
     expiration of such ninety (90) day period subject to the obligation of 
     paying Employee for the remainder of such period;

                (v)  by the Company upon the Disability of Employee; or

               (vi)  Upon the death of Employee.


                                       2
<PAGE>

          (c)  In the event of Employee's termination of employment with the 
Company in accordance with subparagraphs 5(b)(i), 5(b)(ii) or 5(b)(iii) 
above, then:

                (i) Employee's right to exercise any outstanding options 
     pursuant to the Option Agreement shall terminate immediately upon such 
     event; and

               (ii) If the common stock of the Company is not publicly traded 
     (as described in Section 6(a) or 6(b) of the 1992 Stock Option Plan of 
     the Company) ("Publicly Traded"), then, for a period of ninety (90) days 
     following the occurrence of any event described in 5(b)(i), 5(b)(ii) or 
     5(b)(iii), the Company shall have an option to purchase any or all of 
     the Option Shares acquired by Employee pursuant to the Option Agreement. 
     The terms and conditions of such option to purchase shall be as provided 
     in subparagraph 9(a)(i) of the Option Agreement.

          (d)  If at a time when the common stock of the Company is not 
Publicly Traded, Employee's employment with the Company is terminated in 
accordance with subparagraphs 5(b)(iv), 5(b)(v) or 5(b)(vi) herein:

                (i) then Employee or his personal representative shall elect 
     (hereinafter referred to as the "Severance Election") to:

                    (A)  Retain all of his Option Shares (as defined in the 
          Option Agreement) subject to the terms and conditions of the 
          Option Agreement, and to retain the option to purchase any 
          remaining vested Option Shares pursuant to the terms of the Option 
          Agreement (hereinafter the rights under this subparagraph 
          5(d)(i)(A) may be referred to as the "Option Feature"); or

                    (B)  Receive severance pay equal to the aggregate Base 
          Compensation which Employee had received from the Company in the 
          three (3) years (or such lesser period which Employee was employed 
          by the Company) immediately prior to the event occurring which 
          entitled Employee to elect such severance pay (hereinafter referred 
          to as the "Severance Pay Feature"). If Employee or his personal 
          representative elects to receive such Severance Pay Feature, such 
          amount shall be paid to Employee or his personal representative in 
          the same method as Employee was receiving Base Compensation while 
          employed by the Company. By way of example, if Employee was paid 
          Base Compensation in the amount of $30,000 in his first year of 
          employment with the Company (paid in weekly installments), and was 
          paid $20,000 over the following six (6) month period (in weekly 
          installments) before being terminated by the Company without Cause; 
          then, upon Employee or his personal representative electing to 
          receive the Severance Pay Feature, Employee or his personal 
          representative would be entitled to receive $30,000 paid over a one 
          (1) year period in weekly installments, followed by $20,000 to be 
          paid over the following six (6) month period in weekly installments.

                                      3
<PAGE>

               The Severance Election must be exercised in writing by 
Employee or his personal representative within ten (10) days of Employee or 
his personal representative receiving written notification from the Company 
of such right to make such Severance Election. If Employee or his personal 
representative does not make such Severance Election in accordance with such 
requirements, the Company, and not Employee, shall have the right to make 
such Severance Election. In the event Employee or his personal representative 
makes the severance Election (or the Company elects, in the event Employee 
fails to elect as provided herein) to receive the Severance Pay Feature, all 
of Employee's option privileges under the Option Agreement shall expire 
as of the date of the event occurring which entitled Employee to make the 
Severance Election. Thereafter, neither Employee or his personal 
representative shall have the right to purchase any Option Shares and 
Employee or his personal representative shall promptly endorse in blank and 
deliver to the Company all Option Shares then owned by Employee. All such 
Option Shares shall be deemed canceled as of the date of such election. 
Neither Employee nor his personal representative shall be entitled to receive 
any consideration for the return of such Option Shares or the termination of 
the right to purchase any additional Option Shares under the Option Agreement.

               (ii) For a period of one hundred eighty (180) days following 
     the date of exercise of the Severance Election by Employee to retain the 
     Option Feature, the Company shall have an option to terminate all of 
     Employee's option privileges under the Option Agreement and to purchase 
     all of the Option Shares acquired by Employee pursuant to the Option 
     Agreement. The terms and conditions of such option shall be as provided 
     in subparagraph 9(a)(ii) of the Option Agreement.

          (e)  If at a time when the Common Stock of the Company is 
Publicly Traded, Employee's employment with the Company is terminated in 
accordance with subparagraphs 5(b)(iv), 5(b)(v) or 5(b)(vi), then:

                (i) Employee shall not have any right to make the Severance 
     Election;

               (ii) Employee's right to exercise any options for unvested 
     Option Shares pursuant to the Option Agreement shall terminate 
     immediately upon such event;

              (iii) Employee may retain all of his Option Shares subject to 
     the terms and conditions of the Option Agreement; and

               (iv) Employee's right to exercise any options for Option 
     Shares which are vested in accordance with paragraph 1(b) of the Option 
     Agreement at the time of Employee's termination of employment shall 
     continue to be effective until the termination of the options in 
     accordance with the terms of the Option Agreement.

                                      4
<PAGE>

          (f)   Employee shall be entitled to be reimbursed in accordance 
with the policies of the Company, as adopted from time to time, for all 
reasonable and necessary expenses incurred by Employee in connection with the 
performance of Employee's duties of employment hereunder.

          (g)   The obligations of the parties under subparagraphs 5(c), 5(d) 
and 5(e) shall survive the termination of Employee's employment hereunder and 
shall not be extinguished thereby.

     6.   CONFIDENTIAL RELATIONSHIP AND PROTECTION OF TRADE SECRETS AND 
CONFIDENTIAL INFORMATION.  At the time of execution hereof, Employee shall 
execute a nondisclosure agreement in the form which is executed by other 
employees of the Company.

     7.   COVENANT NOT-TO-COMPETE.

          (a)   During the term of his employment with the Company, Employee 
owes a duty of good faith and loyalty to the Company.

          (b)   Employee agrees that, in the event of a termination of 
Employee's employment. Employee will not, for a period of one (1) year after 
such termination, without the prior written consent of the Company, (i) 
either directly or indirectly, on his own behalf or on the service of on 
behalf of others, solicit, divert or appropriate, or attempt to solicit, 
divert or appropriate, to any Competing Business, as hereinafter defined, any 
customer or prospective customer of the Company or Actamed Development Corp. 
with whom Employee had contact on behalf of the Company or Actamed 
Development Corp. within one (1) year prior to such termination of employment 
or (ii) perform similar services for a Competing Business as those which he 
performed for the Company or Actamed Development Corp. during the one (1) 
year period prior to such termination of employment.

          (c)   Employee agrees that, in the event of a termination of 
Employee's employment hereunder, Employee will not, for a period of one year 
after such termination, without the prior written consent of the Company, 
either directly or indirectly, on his own behalf or on the service of or on 
behalf of others, solicit, divert or hire away, or attempt to solicit, divert 
or hire away, to any Competing Business, as hereinafter defined, any person 
employed by the Company or Actamed Development Corp., whether or not such 
person is a full-time employee or a temporary employee of the Company or 
Actamed Development Corp. and whether or not such employment is pursuant to a 
written agreement and whether or not such employment is for a determined 
period or is at will.

          (d)   As used in this Agreement, "Competing Business" means any 
person or entity that is principally engaged in a business substantially the 
same as the business of the Company or Actamed Development Corp.

                                       5
<PAGE>

          (e)   Each of the covenants and agreements of Employee set forth 
in this paragraph 7 hereof shall be deemed separate and severable, each from 
the other, and should any such separate and severable covenant or agreement, 
or any part thereof, be declared invalid or unenforceable by a court of 
competent jurisdiction from which no appeal is timely taken, such declaration 
of invalidity or enforceability shall not in any way affect or limit the 
validity or enforceability of any other covenant or agreement, or part 
thereof, not also declared invalid or unenforceable, each of which shall 
remain binding on Employee in accordance with its respective terms. Further, 
if any such covenant or agreement is so declared to be invalid or 
unenforceable, Employee shall, as soon as possible, execute a supplemental 
agreement with the Company granting to the Company, to the extent legally 
permissible, the protection intended to be afforded to the Company and 
Actamed Development Corp. by the covenant or agreement so declared invalid 
or unenforceable.

     8.   SPECIFIC ENFORCEMENT.  The Company and Employee agree a violation 
of paragraph 7 of this Agreement will cause irreparable injury to the Company 
and its affiliates and that, accordingly, the Company will be entitled, in 
addition to any other rights and remedies it may have at law or in equity, to
seek an injunction enjoining and restraining Employee from doing or planning 
to do any such act and any other violation or threatened violation of 
paragraph 7.

     9.   GOVERNING LAW.  This Agreement shall be governed by and construed 
in accordance with the laws of the State of Georgia. Any action in law or 
equity regarding this Agreement or Employee's rights hereunder may only be 
brought in the State of Georgia.

    10.   SEVERABILITY.  In the event that any provision or portion of this 
Agreement shall be determined to be valid or unenforceable for any reason by 
final judgment of a court of competent jurisdiction, the remaining provisions 
or portions of this Agreement shall be unaffected thereby and shall remain in 
full force and effect to the fullest extent permitted by law. Failure to 
insist upon strict compliance with any provision of this Agreement shall not 
be deemed a waiver of such provision or any other provision of this Agreement.

    11.   NO SET-OFF.  The existence of any claim, demand, action or cause of 
action of Employee against the Company, whether or not based upon this 
Agreement, will not constitute a defense to the enforcement by the Company of 
any covenant or agreement of Employee contained herein.

    12.   NO ATTACHMENT.  Except as required by law, no right to receive 
payments under this Agreement shall be subject to anticipation, commutation, 
alienation, sale, assignment, encumbrance, charge, pledge or hypothecation, 
or to execution, attachment, levy or similar process or assignment by 
operation of law, and any attempt, voluntary or involuntary, to effect any 
such action shall be null, void and of no effect; provided, however, that 
this provision shall not prevent Employee from designating one or more 
beneficiaries to receive any amount after his death and shall not preclude 
his executor or administrator from assigning any right hereunder.

                                       6
<PAGE>

to the person or persons entitled thereto, and in the event of Employee's 
death or a judicial determination of Employee's incompetence, Employee's 
rights under this Agreement shall survive and shall inure to the benefit of 
Employee's heirs, beneficiaries and legal representatives.

     13.  SOURCE OF PAYMENTS.  All payments provided under this Agreement 
shall be paid in cash from the general funds of the Company, and no special 
or separate fund shall be established and no other segregation of assets 
shall be made to assure payment.

     14.  TAX WITHHOLDING.  The Company may withhold from any benefits 
payable under this Agreement all federal, state, city or other taxes as shall 
be required pursuant to any law or governmental regulation or ruling.

     15.  NOTICES.  Any notice or communication between the Company and 
Employee with respect to his Agreement or events covered thereby shall be 
performed or confirmed in writing and be deemed given when personally 
delivered or mailed by registered or certified mail, return receipt 
requested, postage prepaid or dispatched by any overnight delivery service as 
follows:

          If to the Company:

          Actamed Corp.
          5 Concourse Parkway
          Suite 250
          Atlanta, Georgia  30328

          If to Employee:

          5010 McPherson Drive
          Roswell, Georgia  30075

or at such other address as either party may have furnished to the other in 
accordance herewith except that notices of change of address shall be 
effective only upon receipt.

     16.  AMENDMENT, TERMINATION, WAIVER.  No provision of this Agreement may 
be amended, modified or waived unless in writing executed by the Company and 
Employee. No waiver by either party hereto of any breach by the other party 
hereto of any condition or any provisions of this Agreement to be performed 
by such other party shall be deemed a waiver of a subsequent breach of such 
condition or provision or waiver of a similar or dissimilar condition or 
provision at the same time or any subsequent time.

     17.  SUCCESSORS.

          (a)   This Agreement may not be assigned, transferred or conveyed 
by the Company except to a person or entity that acquires all or 
substantially all of the business of the

                                      7
<PAGE>

Company (whether such acquisition is by way of acquisition or assets, 
acquisition of stock, merger, consolidation or otherwise).

          (b)  Employee may not assign, transfer or convey this Agreement.

     18.  COUNTERPARTS.  This Agreement may be executed in one or more 
counterparts, each of which will constitute an original but all of which 
together will constitute but a single document.

     19.  PRIOR AGREEMENTS.  Except for the nondisclosure agreement executed 
pursuant to paragraph 6, this Agreement supersedes all previous agreements 
between the Company and Employee concerning terms and conditions of the 
employment of Employer by the Company, and all such previous agreements are 
hereby canceled by mutual consent.

     20.  BINDING EFFECT.  This Agreement shall be binding on the parties to 
this Agreement and on their respective heirs, administrators, executors, 
successors and assigns.

     IN WITNESS WHEREOF, Employee has hereunder set his hand and seal, and the 
Company has caused this Agreement to be executed by its duly authorized 
officer as of the day and year first above written.


                                       EMPLOYEE:

                                       /s/ Michael K. Hoover
                                       ------------------------------------
                                       Michael K. Hoover


Witness:


- -------------------------------------


                                       ACTAMED CORP.

                                       By:  /s/ P.E. Sadler
                                            -------------------------------
                                            P.E. Sadler, Chairman of Board


                                      8
<PAGE>

                             FIRST AMENDMENT TO
                            EMPLOYMENT AGREEMENT


     THIS AMENDMENT, entered into as of this 3rd day of December, 1993, by
and between ACTAMED CORP., a Georgia corporation (the "Company") and MICHAEL
K. HOOVER ("Employee") hereby amends that certain Employment Agreement, dated 
as of September 23, 1992, by and between the Company and Employee (the 
"Employment Agreement").

                           W I T N E S S E T H:

     WHEREAS, the Company and Employee entered into Nonstatutory Stock Option 
Agreements, dated September 23, 1992 (as amended March 23, 1993), March 23, 
1993 and December 1, 1993, respectively (collectively the "Original Option 
Agreements"); and

     WHEREAS, the Company and Employee on the date hereof have amended and 
restated the Original Option Agreements and have entered into Amended and 
Restated Nonstatutory Stock Option Agreements of even date hereof (the 
"Restated Agreements"), which Restated Agreements replace and supersede the 
Original Option Agreements; and

     WHEREAS, the Company and Employee desire to amend the terms of the 
Employment Agreement on the terms stated herein, to conform with replacement 
of the Original Option Agreements with the Restated Agreements;

     NOW, THEREFORE, in consideration of the mutual promises contained 
herein, the parties hereto agree as follows:

    1. Section 4 of the Employment Agreement is deleted in its entirety and 
replaced with the following new Section 4:

    "4. STOCK OPTIONS. Simultaneously with the execution of that certain 
Amendment to this Agreement, dated December 3, 1993, by and between the 
Company and Employee (the "Amendment"), the Company and Employee have 
terminated the Original Option Agreements (as defined in the Amendment) and 
have entered into the Restated Agreements (as defined in the Amendment)."

    2. Paragraph (d) of Section 5 is deleted in its entirety and replaced 
with the following paragraph (d):

    "(d) Intentionally Deleted."

    3. Paragraph (e) of Section 5 is deleted in its entirety and replaced 
with the following paragraph (e):

    "(e) Intentionally Deleted."


<PAGE>

     4.   Paragraph (g) of Section 5 is deleted in its entirety and replaced 
with the following paragraph (g):

     "(g) The obligations of the parties under paragraph 5(c) shall survive 
the termination of Employee's employment hereunder and shall not be 
extinguished thereby."

     5.   Section 15 is changed by indicating the address of the Company as:
  
                   ActaMed Corp.
                   7000 Central Parkway, Suite 620
                   Atlanta, Georgia 30328

     6.   this Amendment shall be governed by and construed in accordance 
with the laws of the State of Georgia. Any action in law or equity regarding 
this Amendment or Employee's rights hereunder may only be brought in the 
State of Georgia.

     7.   No provision of this Amendment may be amended, modified or waived 
unless in writing executed by the Company and Employee.

     8.   This Amendment may not be assigned, transferred or conveyed by the 
Company except to a person or entity that acquires all or substantially all 
of the business of the Company (whether such acquisition is by way of 
acquisition of assets, acquisition of stock, merger, consolidation or 
otherwise). Employee may not assign, transfer or convey this Amendment.
 
     9.   This Amendment may be executed in one or more counterparts, each 
of which will constitute an original but all of which together will 
constitute but a single document.

     10.  This Amendment shall be binding on the parties to this Amendment 
and on their respective heirs, administrators, executors, successors and 
assigns.

     11.  Except as specifically amended hereby, the Employment Agreement 
shall remain in full force and effect as in force and effect on the date 
hereof.

<PAGE>

     IN WITNESS WHEREOF, Employee has hereunder set his hand and seal, and 
the Company has caused this Agreement to be executed by its duly authorized 
officer as of the day and year first above written.


                                       EMPLOYEE:

                                       /s/ Michael K. Hoover
                                       ------------------------------------
                                       Michael K. Hoover


Witness:

/s/ Nancy J. Ham
- ------------------------------------


                                       ACTAMED CORP.

                                       By: /s/ PE Sadler
                                          ---------------------------------
                                          P. E. Sadler, Chairman of Board




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