TRIZETTO GROUP INC
PRES14A, 2000-08-07
COMPUTER PROCESSING & DATA PREPARATION
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<PAGE>
                            SCHEDULE 14A INFORMATION

                  Proxy Statement Pursuant to Section 14(a) of
                      the Securities Exchange Act of 1934

<TABLE>
      <S>        <C>
      Filed by the Registrant /X/
      Filed by a Party other than the Registrant / /

      Check the appropriate box:
      /X/        Preliminary Proxy Statement
      / /        Confidential, for use of the Commission only (as permitted
                 by Rule 14a-6(e)(2))
      / /        Definitive Proxy Statement
      / /        Definitive Additional Materials
      / /        Soliciting Material Pursuant to Section 240.14a-12

                   THE TRIZETTO GROUP, INC.
      -----------------------------------------------------------------------
                 (Name of Registrant as Specified In Its Charter)

      -----------------------------------------------------------------------
       (Name of Person(s) Filing Proxy Statement, if other than Registrant)
</TABLE>

Payment of Filing Fee (Check the appropriate box):

<TABLE>
<S>        <C>  <C>
/X/        No fee required.
/ /        Fee computed on table below per Exchange Act Rules 14a-6(i)(1)
           and 0-11.
           1)   Title of each class of securities to which transaction
                applies:
                ----------------------------------------------------------
           2)   Aggregate number of securities to which transaction
                applies:
                ----------------------------------------------------------
           3)   Per unit price or other underlying value of transaction
                computed pursuant to Exchange Act Rule 0-11. (Set forth
                the amount on which the filing fee is calculated and state
                how it was determined):
                ----------------------------------------------------------
           4)   Proposed maximum aggregate value of transaction:
                ----------------------------------------------------------
           5)   Total fee paid:
                ----------------------------------------------------------
/ /        Fee paid previously with preliminary materials.
/ /        Check box if any part of the fee is offset as provided by
           Exchange Act Rule 0-11(a)(2) and identify the filing for which
           the offsetting fee was paid previously. Identify the previous
           filing by registration statement number, or the Form or
           Schedule and the date of its filing.
           1)   Amount previously paid:
                ----------------------------------------------------------
           2)   Form, Schedule or Registration Statement No.:
                ----------------------------------------------------------
           3)   Filing Party:
                ----------------------------------------------------------
           4)   Date Filed:
                ----------------------------------------------------------
</TABLE>
<PAGE>
[LOGO]

                                                                 August   , 2000

Dear Fellow Stockholders:

    On behalf of the Board of Directors, it is my pleasure to invite you to
TriZetto's Special Meeting of Stockholders, which will be held on Monday,
           , 2000, at the Marriott Newport Beach Hotel, 900 Newport Center
Drive, Newport Beach, California.

    Attached is the Notice of Meeting and the Proxy Statement, which describes
in detail the matters on which you are being asked to vote. At the special
meeting, you will be asked to vote on a proposal to issue shares of TriZetto
stock to IMS Health Incorporated in connection with the merger of a wholly owned
subsidiary of TriZetto with and into ERISCO Managed Care Technologies, Inc., a
wholly owned subsidiary of IMS Health Incorporated. As a result of the merger,
Erisco will become a wholly owned subsidiary of TriZetto. You will also be asked
to approve an amendment to TriZetto's Amended and Restated Certificate of
Incorporation increasing the number of authorized shares of common stock of
TriZetto. I encourage you to read the proxy statement carefully.

    TriZetto's board of directors has carefully considered the terms and
conditions of the proposed merger and has determined that the merger is fair to
and in the best interest of TriZetto's stockholders. The board has unanimously
approved the merger and recommends a vote for the issuance of TriZetto shares
and a vote for the amendment to TriZetto's Amended and Restated Certificate of
Incorporation.

    Whether you plan to attend the meeting or not, I encourage you to promptly
complete and return the enclosed proxy card so that your shares will be
represented and properly voted at the meeting.

    I look forward to seeing you at the meeting.

                                          /s/ Jeffrey H. Margolis

                                          Jeffrey H. Margolis
                                          CHIEF EXECUTIVE OFFICER, PRESIDENT
                                          AND CHAIRMAN OF THE BOARD
<PAGE>
                            THE TRIZETTO GROUP, INC.
                        567 SAN NICOLAS DRIVE, SUITE 360
                        NEWPORT BEACH, CALIFORNIA 92660
                            ------------------------

                   NOTICE OF SPECIAL MEETING OF STOCKHOLDERS
                       TO BE HELD ON              , 2000
                            ------------------------

    Notice is hereby given that a special meeting of stockholders of The
TriZetto Group, Inc. will be held on         , 2000, at 10:00 a.m., Pacific
time, at the Marriott Newport Beach Hotel, 900 Newport Center Drive, Newport
Beach, California 92660 to consider and vote upon the following proposals:

    1.  To approve the issuance of shares of TriZetto common stock to IMS Health
       Incorporated in connection with the merger of Elbejay Acquisition Corp.,
       a wholly owned subsidiary of TriZetto, with and into ERISCO Managed Care
       Technologies, Inc., a wholly owned subsidiary of IMS Health Incorporated;

    2.  To approve an amendment to TriZetto's Amended and Restated Certificate
       of Incorporation to increase the number of shares of TriZetto's capital
       stock authorized for issuance from 45,000,000 to 100,000,000 consisting
       of 5,000,000 shares of undesignated preferred stock and 95,000,000 shares
       of common stock; and

    3.  To transact such other business as may properly come before the special
       meeting.

    Only stockholders of record at the close of business on August 31, 2000 are
entitled to notice of, and to vote at, the special meeting and any adjournments
or postponements thereof.

    In order to induce IMS HEALTH to enter into the merger, certain principal
stockholders of TriZetto who collectively own approximately 51% of TriZetto
common stock, have entered into voting agreements with IMS HEALTH and have
delivered to IMS HEALTH irrevocable proxies to vote their shares in favor of the
issuance of shares of TriZetto common stock to IMS HEALTH and against any
transaction that might interfere with the merger.

    THE MERGER CANNOT BE CONSUMMATED UNLESS THE ISSUANCE OF SHARES IN CONNECTION
WITH THE MERGER IS APPROVED BY THE TRIZETTO STOCKHOLDERS. THE APPROVAL OF THE
ISSUANCE OF SHARES TO IMS HEALTH IN CONNECTION WITH THE MERGER REQUIRES THE
AFFIRMATIVE VOTE OF A MAJORITY OF THE SHARES PRESENT AND ENTITLED TO VOTE. THE
APPROVAL OF THE AMENDMENT TO THE CERTIFICATE OF INCORPORATION REQUIRES THE
AFFIRMATIVE VOTE OF HOLDERS OF A MAJORITY OF THE SHARES OF TRIZETTO COMMON STOCK
OUTSTANDING.

                                          By Order of the Board of Directors

                                          /s/ Jeffrey H. Margolis

                                          Jeffrey H. Margolis
                                          CHIEF EXECUTIVE OFFICER, PRESIDENT AND
                                          CHAIRMAN OF THE BOARD

August   , 2000
Newport Beach, California
TO ASSURE YOUR SHARES ARE REPRESENTED AT THE SPECIAL MEETING, PLEASE COMPLETE,
DATE AND SIGN THE ENCLOSED PROXY AND MAIL IT PROMPTLY IN THE ENCLOSED
POSTAGE-PAID ENVELOPE, WHETHER OR NOT YOU PLAN TO ATTEND THE MEETING. YOU MAY
REVOKE YOUR PROXY AT ANY TIME BEFORE IT IS VOTED.
<PAGE>
                                PROXY STATEMENT
                               TABLE OF CONTENTS

<TABLE>
<S>                                                           <C>
QUESTIONS AND ANSWERS ABOUT THE MERGER......................      1

SUMMARY.....................................................      3
  THE COMPANIES.............................................      3
  THE TRIZETTO SPECIAL MEETING..............................      3
  THE MERGER................................................      4
  RELATED AGREEMENTS........................................      7
  PER SHARE MARKET PRICE INFORMATION........................      7

SELECTED CONSOLIDATED FINANCIAL DATA........................      8
  THE TRIZETTO GROUP, INC. AND SUBSIDIARIES.................      8
  ERISCO MANAGED CARE TECHNOLOGIES, INC.....................     10

UNAUDITED PRO FORMA COMBINED CONDENSED SELECTED CONSOLIDATED
FINANCIAL DATA OF TRIZETTO AND ERISCO.......................     11

MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION
AND RESULTS OF OPERATIONS OF TRIZETTO.......................     12
  OVERVIEW..................................................     12
  OPERATING DATA............................................     15
  RESULTS OF OPERATIONS.....................................     16
  SIX MONTHS ENDED JUNE 30, 2000 COMPARED TO SIX MONTHS
    ENDED JUNE 30, 1999.....................................     16
  YEAR ENDED DECEMBER 31, 1999 COMPARED TO THE YEAR ENDED
    DECEMBER 31, 1998.......................................     18
  YEAR ENDED DECEMBER 31, 1998 COMPARED TO THE COMBINED YEAR
    ENDED DECEMBER 31, 1997.................................     19
  LIQUIDITY AND CAPITAL RESOURCES...........................     20
  RECENT ACCOUNTING PRONOUNCEMENTS..........................     21
  QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET
    RISK....................................................     22

MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION
AND RESULTS OF OPERATIONS OF ERISCO.........................     23
  OVERVIEW..................................................     23
  RESULTS OF OPERATIONS.....................................     23
  SIX MONTHS ENDED JUNE 30, 2000 COMPARED TO SIX MONTHS
    ENDED JUNE 30, 1999.....................................     23
  YEAR ENDED DECEMBER 31, 1999 COMPARED TO THE YEAR ENDED
    DECEMBER 31, 1998.......................................     24
  YEAR ENDED DECEMBER 31, 1998 COMPARED TO THE YEAR ENDED
    DECEMBER 31, 1997.......................................     25
  LIQUIDITY AND CAPITAL RESOURCES...........................     26
  RECENT ACCOUNTING PRONOUNCEMENTS..........................     27

CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS...     27

UNAUDITED PRO FORMA COMBINED CONDENSED FINANCIAL
INFORMATION.................................................     30

THE TRIZETTO SPECIAL MEETING................................     36

THE MERGER..................................................     39
  BACKGROUND OF THE MERGER..................................     39
  TRIZETTO'S REASONS FOR THE MERGER; RECOMMENDATION OF
    TRIZETTO'S BOARD OF DIRECTORS...........................     41
  OPINION OF TRIZETTO'S FINANCIAL ADVISOR...................     42
  TAX OPINIONS..............................................     47
  CERTAIN U.S. FEDERAL INCOME TAX CONSEQUENCES OF THE
    MERGER..................................................     48
  REQUIRED REGULATORY FILINGS AND APPROVALS.................     48
</TABLE>

                                       i
<PAGE>
<TABLE>
<S>                                                           <C>
  RESTRICTED SHARES.........................................     49
  MANAGEMENT AND OPERATIONS FOLLOWING THE MERGER............     49
  INTERESTS OF CERTAIN PERSONS IN THE MERGER................     49
  OPTION GRANTS TO ERISCO EMPLOYEES.........................     50
  NO APPRAISAL RIGHTS.......................................     50
  ACCOUNTING TREATMENT......................................     50

THE MERGER AGREEMENT........................................     51
  STRUCTURE OF THE MERGER...................................     51
  MERGER CONSIDERATION......................................     51
  REPRESENTATIONS AND WARRANTIES............................     52
  CONDUCT OF BUSINESS PRIOR TO THE MERGER...................     53
  ADOPTION OF STOCKHOLDER PROTECTION RIGHTS AGREEMENT.......     54
  ADDITIONAL AGREEMENTS.....................................     54
  RESTRICTED SHARES OF TRIZETTO COMMON STOCK................     55
  CONDITIONS TO THE MERGER..................................     56
  TERMINATION RIGHTS........................................     57
  INDEMNIFICATION RIGHTS....................................     57
  AMENDMENT AND WAIVER......................................     57

RELATED AGREEMENTS..........................................     58
  VOTING AGREEMENTS.........................................     58
  REGISTRATION RIGHTS AGREEMENT.............................     58
  STOCKHOLDER AGREEMENT.....................................     59

MARKET PRICE AND DIVIDEND INFORMATION.......................     60

BUSINESS OF TRIZETTO........................................     61
  COMPANY OVERVIEW..........................................     61
  TRIZETTO'S SOLUTIONS......................................     62
  TRIZETTO'S PRODUCTS AND SERVICES..........................     62
  SALES AND MARKETING.......................................     67
  CUSTOMER SERVICE..........................................     67
  VENDOR PARTNER RELATIONSHIPS..............................     68
  COMPETITION...............................................     69
  INTELLECTUAL PROPERTY.....................................     70
  TECHNOLOGY................................................     70
  GOVERNMENT REGULATION.....................................     71
  PROPERTIES................................................     72
  LEGAL PROCEEDINGS.........................................     72

BUSINESS OF ERISCO..........................................     73

AMENDMENT TO TRIZETTO'S AMENDED AND RESTATED CERTIFICATE OF
INCORPORATION...............................................     74
  PROPOSED AMENDMENT........................................     74
  DESCRIPTION OF AMENDMENT..................................     74

SECURITY OWNERSHIP OF MANAGEMENT AND CERTAIN BENEFICIAL
OWNERS......................................................     76

LEGAL MATTERS...............................................     77

EXPERTS.....................................................     77

STOCKHOLDER PROPOSALS.......................................     77

WHERE YOU CAN FIND MORE INFORMATION.........................     78
</TABLE>

                                       ii
<PAGE>
<TABLE>
<S>                                                           <C>
INDEX TO FINANCIAL STATEMENTS...............................    F-1
</TABLE>

<TABLE>
<S>                    <C>
APPENDIX A             Agreement and Plan of Reorganization, dated as of May 16,
                       2000, among The TriZetto Group, Inc., Elbejay Acquisition
                       Corp., a wholly owned subsidiary of TriZetto, IMS Health
                       Incorporated, and ERISCO Managed Care Technologies, a wholly
                       owned subsidiary of IMS HEALTH
APPENDIX B             Opinion of UBS Warburg LLC, dated May 16, 2000
APPENDIX C-1           Form of Voting Agreement
APPENDIX C-2           Form of Voting Agreement
APPENDIX C-3           Form of Voting Agreement
APPENDIX D             Form of Registration Rights Agreement
APPENDIX E             Form of Stockholder Agreement
</TABLE>

                                      iii
<PAGE>
                     QUESTIONS AND ANSWERS ABOUT THE MERGER

Q:  WHAT IS THE MERGER?

A:  Elbejay Acquisition Corp., a wholly owned subsidiary of TriZetto, will merge
    with and into Erisco, a leading provider of application software and
    services to the healthcare industry and a wholly owned subsidiary of IMS
    Health Incorporated. As a result of the merger, Erisco will become a wholly
    owned subsidiary of TriZetto. In connection with the merger, shares of
    TriZetto common stock will be issued to IMS HEALTH, the sole stockholder of
    Erisco. For a more complete description of the merger, see the section of
    this proxy statement entitled "Structure of the Merger" on page 51.

Q:  WHY IS TRIZETTO PROPOSING THE MERGER?

A:  TriZetto believes that the software, financial resources and installed
    customer base held by Erisco will provide TriZetto with a competitive
    advantage. TriZetto also believes that the strategic acquisition of Erisco
    will substantially mitigate many of the significant challenges that TriZetto
    will continue to face as a provider of application services and business
    portals for the healthcare industry. For more information on the reasons
    TriZetto is proposing the merger, see the section of this proxy statement
    entitled "TriZetto's Reasons for the Merger; Recommendation of TriZetto's
    Board of Directors" on page 41.

Q:  WHAT WILL IMS HEALTH RECEIVE IN THE MERGER?

A:  All of the issued and outstanding shares of Erisco common stock are owned by
    IMS HEALTH. Upon the closing of the merger, the shares of Erisco's common
    stock that are issued and outstanding immediately prior to the merger will
    be automatically converted, in the aggregate, into the right to receive the
    number of shares of TriZetto common stock equal to the amount derived by
    dividing $255 million by the average per share closing price of TriZetto
    common stock as reported by the Nasdaq National Market System for the
    15 days ending on the third day prior to the closing date of the merger. The
    merger agreement provides, however, that if the average closing price is
    less than $21.00, IMS HEALTH will receive 12,142,857 shares of TriZetto
    common stock, and if the average closing price is greater than $29.00, IMS
    HEALTH will receive 8,793,103 shares of TriZetto common stock. No fractional
    shares will be issued. Based on the closing price of TriZetto common stock
    on August   , 2000 of $      per share, IMS HEALTH will own approximately
      % of TriZetto's outstanding common stock after the merger. For a more
    complete description of the merger consideration, see the section of this
    proxy statement entitled "Merger Consideration" on page 51.

Q:  WHAT AM I BEING ASKED TO VOTE ON?

A:  You are being asked to approve the issuance of shares of TriZetto common
    stock to IMS HEALTH in connection with the merger and also to approve an
    amendment to TriZetto's Amended and Restated Certificate of Incorporation to
    increase the number of shares of capital stock authorized for issuance from
    45,000,000 shares to 100,000,000 shares, consisting of 5,000,000 shares of
    undesignated preferred stock and 95,000,000 shares of common stock. The
    merger cannot be consummated unless the issuance of shares to IMS HEALTH in
    connection with the merger is approved by the TriZetto stockholders.

Q:  WHAT VOTE IS REQUIRED TO APPROVE THE TWO PROPOSALS?

A:  The approval of the issuance of shares of TriZetto common stock to IMS
    HEALTH requires the affirmative vote of a majority of the shares present and
    entitled to vote. The approval of the amendment to TriZetto's Amended and
    Restated Certificate of Incorporation requires the affirmative vote of
    holders of a majority of the shares of

                                       1
<PAGE>
    TriZetto common stock outstanding. In order to induce IMS HEALTH to enter
    into the merger, certain stockholders of TriZetto who collectively own
    approximately 51% of TriZetto common stock, have entered into voting
    agreements with IMS HEALTH and have delivered to IMS HEALTH irrevocable
    proxies to vote their shares in favor of the issuance of TriZetto common
    stock to IMS HEALTH and against any transaction that might interfere with
    the merger.

Q:  WHAT DO I NEED TO DO NOW IF I HAVE NOT DELIVERED AN IRREVOCABLE PROXY TO IMS
    HEALTH?

A:  Mail your signed proxy card in the enclosed return envelope as soon as
    possible so that your shares may be represented and voted at the special
    meeting. If you do not include instructions on how to vote your properly
    signed proxy, your shares will be voted "FOR" approval of the proposals to
    be voted on at the meeting.

Q:  WHAT DO I NEED TO DO NOW IF I HAVE ALREADY DELIVERED AN IRREVOCABLE PROXY TO
    IMS HEALTH?

A:  If you have previously executed an irrevocable proxy in favor of IMS HEALTH,
    you are receiving a proxy card with this proxy statement which only permits
    you to vote on the amendment to TriZetto's Amended and Restated Certificate
    of Incorporation. IMS HEALTH will separately vote your shares in favor of
    the issuance of shares of TriZetto common stock to IMS HEALTH. Mail your
    signed proxy card in the enclosed return envelope as soon as possible so
    that your shares may be represented and voted at the meeting. If you do not
    include instructions on how to vote your properly signed proxy, your shares
    will be voted "FOR" approval of the amendment to TriZetto's Amended and
    Restated Certificate of Incorporation.

Q:  IF MY SHARES ARE HELD IN "STREET NAME" BY MY BROKER, WILL MY BROKER VOTE MY
    SHARES FOR ME?

A:  Your broker will vote your shares only if you provide instructions on how to
    vote. You should follow the directions provided by your broker regarding how
    to instruct your broker to vote your shares. Without instructions, your
    shares will not be voted at the special meeting, which will have the same
    effect as voting against the amendment to TriZetto's Certificate of
    Incorporation, but which will have no effect on the issuance of shares of
    TriZetto common stock in connection with the merger.

Q:  CAN I CHANGE MY VOTE AFTER I HAVE MAILED MY SIGNED PROXY CARD?

A:  Yes. There are three ways in which you may revoke your proxy and change your
    vote. First, you may send a written notice to the party to whom you
    submitted your proxy stating that you would like to revoke your proxy.
    Second, you may complete and submit a new proxy card. Third, you may attend
    the special meeting and vote in person. Simply attending the stockholders
    meeting, however, will not revoke your proxy. If you have instructed a
    broker to vote your shares, you must follow directions received from your
    broker to change your vote.

Q:  WHEN DO YOU EXPECT THE MERGER TO BE COMPLETED?

A:  TriZetto is working towards completing the merger as quickly as possible.
    TriZetto hopes to complete the merger in the third quarter of 2000.

Q:  WHO SHOULD I CALL WITH MY QUESTIONS?

A:  If you would like additional copies of this document, or if you have more
    questions about the merger, including the procedures for voting your shares,
    please contact:

                             The TriZetto Group, Inc.
                              Attention: Harvey Garte
                           Phone number: (949) 719-2200

                                       2
<PAGE>
                                    SUMMARY

    This summary highlights information from this proxy statement. This summary
may not contain all of the information that is important to you. You should read
carefully the entire proxy statement and the other documents to which this
document refers to obtain a full understanding of the matters that you are being
requested to vote on at the special meeting.

THE COMPANIES

                              The TriZetto Group, Inc.
                        567 San Nicolas Drive, Suite 360
                        Newport Beach, California 92660
                                 (949) 719-2200

    TriZetto is the leading provider of vertical, Internet-enabled application
services and business portals for the healthcare industry. As an application
services provider (ASP), TriZetto hosts software for a predictable monthly fee,
saving customers significant time, money and frustration. HealthWeb(SM), its
Internet portal, assists healthcare administrators and professionals in
performing their routine tasks and facilitates information-exchange and
e-commerce among all key healthcare participants, providers, health plans,
employers and health plan members. TriZetto is a Delaware corporation with its
principal offices located at the above address.

                     ERISCO Managed Care Technologies, Inc.
                           1700 Broadway, 26th Floor
                            New York, New York 10019
                                 (212) 765-8500

    Erisco is a leading provider of application software and services for the
healthcare industry and a wholly owned subsidiary of IMS Health Incorporated.
Erisco's legacy system solutions, ClaimFacts-Registered Trademark- and
GroupFacts-Registered Trademark-, were designed to help indemnity insurance
carriers, third party administrators and self-administered corporations manage
the administration of group health and life insurance products. Erisco's primary
offering is Facets-Registered Trademark-, a client/server system which
integrates advanced technology with clinical information to help managed care
organizations provide high-quality, cost-effective solutions in their
marketplace. Erisco is a New York corporation with its principal offices located
at the above address.

THE TRIZETTO SPECIAL MEETING

    The TriZetto special meeting will be held on         , 2000 at 10:00 a.m.,
Pacific time, at the Marriott Newport Beach Hotel, 900 Newport Center Drive,
Newport Beach, California 92660. At the meeting, TriZetto stockholders will be
asked to approve the issuance of shares of TriZetto common stock to IMS HEALTH
in connection with the merger and to approve an amendment to TriZetto's Amended
and Restated Certificate of Incorporation to increase the number of shares of
capital stock authorized for issuance from 45,000,000 shares to 100,000,000
shares, consisting of 5,000,000 shares of undesignated preferred stock and
95,000,000 shares of common stock.

RECORD DATE; VOTE REQUIRED (PAGES 36 AND 37)

    You are entitled to vote at the stockholders meeting if you owned shares at
the close of business on August 31, 2000, which is the record date for the
stockholders meeting. On August 31, 2000, there were             shares of
TriZetto common stock outstanding. You can cast one vote for each share of
TriZetto common stock that you owned on the record date.

                                       3
<PAGE>
    Approval by TriZetto stockholders of the issuance of shares of TriZetto
common stock to IMS HEALTH in connection with the merger requires the favorable
vote of more than 50% of the total shares present and entitled to vote at the
special meeting. The approval of the amendment to the Amended and Restated
Certificate of Incorporation requires the favorable vote of more than 50% of the
shares of TriZetto common stock outstanding on the record date. In order to
induce IMS HEALTH to enter into the transaction, certain stockholders of
TriZetto, holding in the aggregate 10,909,694 shares of common stock,
representing approximately 51% of TriZetto's outstanding shares of common stock,
have agreed to vote in favor of the issuance of TriZetto common stock to IMS
HEALTH in connection with the merger and against any transaction that might
interfere with the merger.

RECOMMENDATIONS OF TRIZETTO'S BOARD OF DIRECTORS (PAGES 38 AND 41)

    TriZetto's board of directors believes that the issuance of shares of
TriZetto common stock to IMS HEALTH in connection with the merger is fair to
TriZetto and you, as a TriZetto stockholder, and is also in the best interests
of TriZetto and its stockholders. TriZetto's board of directors unanimously
recommends that you vote "FOR" the proposal to approve the issuance of shares of
TriZetto common stock to IMS HEALTH in connection with the merger, and that you
also vote "FOR" an amendment increasing the number of shares of capital stock of
TriZetto authorized from 45,000,000 shares to 100,000,000 shares, consisting of
5,000,000 shares of undesignated preferred stock and 95,000,000 shares of common
stock.

THE MERGER

    TriZetto has attached the merger agreement to this document as Appendix A.
Please read the merger agreement in its entirety. It is the legal document that
governs the merger.

GENERAL (PAGE 51)

    If all conditions to the merger are satisfied, a wholly owned subsidiary of
TriZetto will merge with and into Erisco, and Erisco will be the surviving
corporation. After the merger, Erisco will be a wholly owned subsidiary of
TriZetto. The merger agreement provides that Erisco's sole stockholder, IMS
HEALTH, will receive shares of TriZetto common stock equal to $255 million
divided by the average closing price of TriZetto common stock for the 15 trading
days ending on the third trading day prior to the closing date. The merger
agreement provides, however, that if the average closing price is less than
$21.00, IMS HEALTH will receive 12,142,857 shares of TriZetto common stock, and
if the average closing price is greater than $29.00, IMS HEALTH will receive
8,793,103 shares of TriZetto common stock. Based on the closing price of
TriZetto common stock on August   , 2000, the last trading day for which closing
prices were available at the time of printing this proxy statement, of $
per share, TriZetto will issue       shares of common stock to IMS HEALTH in
connection with the merger, representing approximately   % of TriZetto's
outstanding common stock after the merger.

    For you, as a TriZetto stockholder, each of your shares of TriZetto common
stock will remain issued and outstanding.

OPINION OF TRIZETTO'S FINANCIAL ADVISOR (PAGE 42)

    TriZetto's board of directors has received a written opinion from UBS
Warburg LLC as to the fairness, from a financial point of view, to TriZetto of
the merger consideration. The full text of UBS Warburg's written opinion dated
May 16, 2000 is attached to this document as Appendix B. TriZetto encourages you
to read this opinion carefully in its entirety for a description of the
assumptions made, procedures followed, matters considered and limitations on the
review undertaken. UBS WARBURG'S

                                       4
<PAGE>
OPINION IS ADDRESSED TO THE TRIZETTO BOARD AND DOES NOT CONSTITUTE A
RECOMMENDATION TO ANY STOCKHOLDER WITH RESPECT TO ANY MATTERS RELATING TO THE
MERGER.

CERTAIN U.S. FEDERAL INCOME TAX CONSEQUENCES OF THE MERGER (PAGE 48)

    Since the merger is expected to qualify as a reorganization under
Section 368(a) of the Internal Revenue Code of 1986, none of TriZetto, Erisco,
IMS HEALTH, as the sole stockholder of Erisco, or the stockholders of TriZetto,
will recognize any gain or loss as a result of the merger.

INTERESTS OF CERTAIN PERSONS IN THE MERGER (PAGE 49)

    TriZetto's directors and executive officers do not have interests in the
merger that are different from, or in addition to, the interests of TriZetto
stockholders generally.

REQUIRED REGULATORY FILINGS AND APPROVALS (PAGE 48)

    The Hart-Scott-Rodino Antitrust Improvements Act of 1976 requires TriZetto
and IMS HEALTH to furnish certain information and materials to the Antitrust
Division of the Department of Justice and the Federal Trade Commission and
requires a specified waiting period to expire or be terminated before the merger
can be completed. Even after the waiting period expires or terminates, the
Antitrust Division of the Department of Justice and the Federal Trade Commission
will have the authority to challenge the merger on antitrust grounds before or
after the merger is completed. TriZetto and IMS HEALTH filed the antitrust
notification and report forms on August 3, 2000 and received early termination
of the waiting period on August   , 2000.

SECURITY OWNERSHIP OF MANAGEMENT AND DIRECTORS (PAGE 76)

    On August 31, 2000, directors and executive officers of TriZetto and their
affiliates held and were entitled to vote       shares of TriZetto common stock,
or approximately   % of the shares of TriZetto common stock outstanding on the
record date for the special meeting. In order to induce IMS HEALTH to enter into
the transaction, certain directors and executive officers of TriZetto as well as
certain principal stockholders of TriZetto, representing, in the aggregate,
approximately 51% of TriZetto's outstanding shares of common stock, have entered
into voting agreements with IMS HEALTH and have delivered irrevocable proxies to
IMS HEALTH to vote their shares in favor of the issuance of TriZetto common
stock to IMS HEALTH and against any transaction that might interfere with the
merger.

NO APPRAISAL RIGHTS (PAGE 50)

    Under Delaware law, you are not entitled to appraisal rights with respect to
the share issuance in connection with the merger.

CONDITIONS TO COMPLETION OF THE MERGER (PAGE 56)

    The completion of the merger depends on a number of conditions being
satisfied, including the following:

    - approval of the issuance of shares of TriZetto common stock to IMS HEALTH
      in connection with the merger;

    - certain related agreements between IMS HEALTH and TriZetto being entered
      into;

    - the receipt of all necessary governmental consents, including expiration
      or termination of applicable waiting periods under U.S. antitrust laws;

                                       5
<PAGE>
    - the absence of any order, decree or ruling or any statute or regulation
      which would prohibit the merger or render the merger illegal; and

    - the absence of material adverse changes to the financial condition or
      results of operations of each of Erisco and TriZetto other than changes
      caused by changes in general economic conditions or conditions generally
      affecting the industries in which TriZetto and Erisco conduct their
      respective operations.

    Either TriZetto or IMS HEALTH may choose to waive a condition to its
obligation to complete the merger even though that condition has not been
satisfied. In the event that the parties do decide to waive any conditions, the
parties may recirculate this document to disclose the waiver of the condition
and all related disclosures, including the risks to TriZetto stockholders
resulting from the waiver, and may resolicit proxies from the stockholders of
TriZetto to approve the issuance of TriZetto shares.

ACCOUNTING TREATMENT (PAGE 50)

    The merger will be accounted for as a "purchase" in accordance with
generally accepted accounting principles, which means that the assets and
liabilities of Erisco will be recorded on the books of TriZetto at their fair
values, with the excess, if any, allocated to goodwill.

TERMINATION OF THE MERGER AGREEMENT (PAGE 56)

    TriZetto and IMS HEALTH, may agree in writing to terminate the merger
agreement at any time without completing the merger.

    In addition, the merger agreement may be terminated under the circumstances
summarized below:

    - by IMS HEALTH, if TriZetto has materially breached its representations and
      warranties or materially failed to perform its covenants or agreements and
      such breach or failure to perform has not been cured prior to the closing;

    - by TriZetto, if IMS HEALTH has materially breached its representations and
      warranties or materially failed to perform its covenants or agreements and
      such breach or failure to perform has not been cured prior to the closing;

    - by either IMS HEALTH or TriZetto, if the TriZetto special meeting shall
      have been held and the required approval of the stockholders of TriZetto
      shall not have been obtained;

    - by either IMS HEALTH or TriZetto, if all the conditions of the merger
      agreement have not be satisfied or waived on or before December 31, 2000,
      other than as a result of a breach by the terminating party; or

    - by either IMS HEALTH or TriZetto, if an order by a federal or state court
      that would make illegal or otherwise prohibit the consummation of the
      merger is issued and becomes final and nonappealable.

PROXIES

    You may use the accompanying proxy if you are unable to attend the TriZetto
special meeting in person or wish to have your shares voted by proxy even if you
do attend the TriZetto special meeting. All shares of TriZetto common stock
represented by valid proxies received pursuant to this solicitation, and not
revoked before they are exercised, will be voted in the manner specified
therein. Proxies received that do not contain voting instructions will be voted
"FOR" the issuance of shares of TriZetto common stock in the merger and "FOR"
the amendment to TriZetto's Amended and Restated Certificate of Incorporation.

                                       6
<PAGE>
RELATED AGREEMENTS

VOTING AGREEMENTS (PAGE 58)

    In order to induce IMS HEALTH to enter into the transaction, certain holders
of TriZetto common stock have entered into voting agreements with IMS HEALTH
which provide, among other things, that they will vote their shares, and any
additional shares they acquire, in favor of the issuance of shares of TriZetto
common stock to IMS HEALTH in connection with the merger and any related matters
and against any action or agreement that would interfere with the merger or the
issuance of shares of TriZetto common stock. Such stockholders have delivered
irrevocable proxies to IMS HEALTH to this effect. Therefore, these stockholders
will not receive a proxy with respect to the issuance of shares of TriZetto
common stock in connection with the merger. As of the record date, such
stockholders as a group beneficially owned TriZetto common stock constituting
approximately 51% of the shares of TriZetto common stock outstanding.

REGISTRATION RIGHTS AGREEMENT (PAGE 58)

    As a condition to the closing of the merger, TriZetto and IMS HEALTH, as the
sole stockholder of Erisco, will enter into a registration rights agreement, a
form of which is attached to this proxy statement as Appendix D. Under the
registration rights agreement, IMS HEALTH will have the right, on no more than
three occasions, to cause TriZetto to register its shares of TriZetto common
stock under the Securities Act at any time following the date two years after
the closing of the merger by providing a written demand to TriZetto for
registration of at least 20% of the shares then held by IMS HEALTH.
Additionally, the registration rights agreement provides that IMS HEALTH will
have the right to cause TriZetto, subject to certain limitations, to register
its shares under the Securities Act of 1933, as amended (referred to in this
proxy statement as the Securities Act), at any time following the date two years
after the closing of the merger by requesting the inclusion of shares then held
by IMS HEALTH in any registration statement filed by TriZetto.

STOCKHOLDER AGREEMENT (PAGE 59)

    As a condition to closing of the merger, TriZetto and IMS HEALTH will enter
into a stockholder agreement, a form of which is attached to this proxy
statement as Appendix E. The stockholder agreement restricts certain transfers
of shares of TriZetto common stock held by IMS HEALTH for a period of time after
the merger and also contains standstill provisions which, for a designated
period of time, restrict IMS HEALTH from acquiring additional shares of TriZetto
common stock or engaging in certain activities without the prior written consent
of TriZetto. Additionally, the stockholder agreement grants TriZetto a right of
first refusal prior to the disposition of beneficial ownership by IMS HEALTH of
a certain minimum percentage of TriZetto common stock and grants TriZetto a
right of first offer if IMS HEALTH proposes to dispose of beneficial ownership
of any shares of TriZetto common stock. The stockholder agreement also provides
that IMS HEALTH shall be entitled to designate one member of TriZetto's board of
directors, subject to certain conditions, and that TriZetto must obtain IMS
HEALTH's written consent prior to entering into certain transactions with
specified competitors or potential competitors of IMS HEALTH.

PER SHARE MARKET PRICE INFORMATION

    Shares of TriZetto common stock are listed on The Nasdaq National Market
System under the symbol "TZIX". The following table sets forth the closing price
per share of TriZetto common stock on The Nasdaq National Market on May 16,
2000, the last trading day before the public announcement of

                                       7
<PAGE>
the proposed merger, and August   , 2000, the last trading day for which closing
prices were available at the time of printing this proxy statement.

<TABLE>
<CAPTION>
                                                                   TRIZETTO
                                                                 COMMON STOCK
                                                              (DOLLARS PER SHARE)
                                                              -------------------
<S>                                                           <C>
May 16, 2000................................................        $24.00
August   , 2000.............................................        $
</TABLE>

    The market price of TriZetto common stock will fluctuate prior to the
merger. No assurance can be given as to the future prices or markets for
TriZetto common stock. You should obtain current stock price quotations for
TriZetto common stock. Additional market price information is contained on page
60 under the heading "Market Price and Dividend Information."

                      SELECTED CONSOLIDATED FINANCIAL DATA

THE TRIZETTO GROUP, INC. AND SUBSIDIARIES

    The following selected consolidated financial data of TriZetto should be
read in conjunction with "Management's Discussion and Analysis of Financial
Condition and Results of Operations" and the consolidated financial statements
and related notes included elsewhere in this proxy statement. The statements of
operations data of Croghan & Associates, Inc. for the year ended December 31,
1996 and the nine months ended September 30, 1997 are derived from the financial
statements of Croghan & Associates, Inc. included elsewhere in this proxy
statement which have been audited by PricewaterhouseCoopers LLP, independent
auditors. The consolidated statements of operations data of TriZetto for the
period from May 27, 1997 (date of inception) to December 31, 1997, for the years
ended December 31, 1998 and 1999 and for the six months ended June 30, 1999 and
the consolidated balance sheet data as of December 31, 1998 and 1999 and as of
June 30, 1999 are derived from TriZetto's consolidated financial statements
included elsewhere in this proxy statement which have been audited by
PricewaterhouseCoopers LLP, independent auditors. The consolidated balance sheet
data of TriZetto as of December 31, 1997 is derived from TriZetto's audited
consolidated financial statements not included in this proxy statement which
have been audited by PricewaterhouseCoopers LLP, independent auditors. The
balance sheet data of Croghan & Associates, Inc. as of December 31, 1996 is
derived from unaudited financial statements not included in the proxy statement.
The consolidated statement of operations data of TriZetto for the six months
ended June 30, 2000 and the consolidated balance sheet data as of June 30, 2000
are derived from unaudited consolidated financial statements included elsewhere
in this proxy statement. In the opinion of management, the unaudited
consolidated financial statements include all adjustments, consisting
principally of normal recurring adjustments, necessary for a fair presentation
of the results of operations for the period. Historical results are not
necessarily indicative of the results of operations to be expected for future
periods and the results of interim periods are not necessarily indicative of the
results for a full year.

                                       8
<PAGE>
                SELECTED CONSOLIDATED FINANCIAL DATA OF TRIZETTO
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)

<TABLE>
<CAPTION>
                                                                                                             CROGHAN AND
                                                                                   FOR THE PERIOD         ASSOCIATES, INC.
                              FOR THE SIX MONTHS                                    FROM MAY 27,    -----------------------------
                                    ENDED                FOR THE YEAR ENDED        1997 (DATE OF     NINE MONTHS
                            ----------------------   ---------------------------   INCEPTION) TO        ENDED         YEAR ENDED
                             JUNE 30,     JUNE 30,   DECEMBER 31,   DECEMBER 31,    DECEMBER 31,    SEPTEMBER 30,    DECEMBER 31,
                               2000         1999         1999           1998            1997             1997            1996
                            -----------   --------   ------------   ------------   --------------   --------------   ------------
                            (UNAUDITED)
<S>                         <C>           <C>        <C>            <C>            <C>              <C>              <C>
Revenues:
  Recurring revenue.......   $ 24,344     $ 6,201      $19,448        $ 5,300          $1,191          $ 3,881         $ 5,088
  Non-recurring revenue...     11,132       6,508       13,478          6,131           1,328               --              --
                             --------     -------      -------        -------          ------          -------         -------
Total revenues............     35,476      12,709       32,926         11,431           2,519            3,881           5,088
                             --------     -------      -------        -------          ------          -------         -------
Cost of revenues:
  Recurring revenue.......     22,656       5,038       17,057          3,967           1,250            3,609           4,068
  Non-recurring revenue...      7,756       4,109        9,751          3,490             422               --              --
                             --------     -------      -------        -------          ------          -------         -------
Total cost of revenues....     30,412       9,147       26,808          7,457           1,672            3,609           4,068
                             --------     -------      -------        -------          ------          -------         -------
Gross profit..............      5,064       3,562        6,118          3,974             847              272           1,020
                             --------     -------      -------        -------          ------          -------         -------
Operating expenses:
  Research and
    development...........      3,197         440        2,371          1,083              --               --              --
  Selling, general and
    administrative........     17,395       3,098        9,694          2,885             672            2,415           2,142
  Amortization of deferred
    stock compensation....        892         215        1,057             22              --               --              --
  Write-off of acquired
    in-process
    technology............        536         484        1,407             --              --               --              --
                             --------     -------      -------        -------          ------          -------         -------
  Total operating
    expenses..............     22,020       4,237       14,529          3,990             672            2,415           2,142
                             --------     -------      -------        -------          ------          -------         -------
Income (loss) from
  operations..............    (16,956)       (675)      (8,411)           (16)            175           (2,143)         (1,122)
Interest income...........        609          76          527            210              15               15              21
Interest expense..........       (183)       (100)        (256)           (52)            (13)             (84)         (1,341)
                             --------     -------      -------        -------          ------          -------         -------
  Income (loss) before
    provision for income
    taxes and
    extraordinary item....    (16,530)       (699)      (8,140)           142             177           (2,212)         (2,442)
Provision for (benefit of)
  income taxes............         --          28         (213)            82              74               --              --
                             --------     -------      -------        -------          ------          -------         -------
Income (loss) before
  extraordinary item......    (16,530)       (727)      (7,927)            60             103           (2,212)         (2,442)
Extraordinary item:
  Gain on forgiveness of
    debt..................         --          --           --             --              --            1,000              --
                             --------     -------      -------        -------          ------          -------         -------
  Net income (loss).......   $(16,530)    $  (727)     $(7,927)       $    60          $  103          $(1,212)        $(2,442)
                             ========     =======      =======        =======          ======          =======         =======
Net income (loss) per
  share:
  Basic...................   $  (0.85)    $ (0.12)     $ (0.85)       $  0.01          $ 0.05
                             ========     =======      =======        =======          ======
  Diluted.................   $  (0.85)    $ (0.12)     $ (0.85)       $  0.00          $ 0.03
                             ========     =======      =======        =======          ======
Shares used in computing
  net income (loss) per
  share:
  Basic...................     19,557       6,216        9,376          4,937           2,065
                             ========     =======      =======        =======          ======
  Diluted.................     19,557       6,216        9,376         12,783           4,074
                             ========     =======      =======        =======          ======
</TABLE>

<TABLE>
<CAPTION>
                                                                                                             CROGHAN &
                                                                                                           ASSOCIATES AS
                                                                                                            OF DECEMBER
                                                         JUNE 30,                DECEMBER 31,                   31,
                                                           2000         1999         1998         1997         1996
                                                        -----------   --------   ------------   --------   -------------
                                                        (UNAUDITED)
<S>                                                     <C>           <C>        <C>            <C>        <C>
Consolidated Balance Sheet Data:
Cash, cash equivalents, and short-term investments....    $ 8,433     $24,806       $3,681       $  773       $ 1,757
Total assets..........................................     58,839      68,418        8,720        2,634        11,174
Total long-term debt and capital lease obligations....      2,859       2,728          645          520         1,400
Mandatorily redeemable convertible preferred stock....         --          --        6,449           --            --
Total stockholders' equity (deficit)..................     39,842      51,296         (741)         563       $ 7,819
</TABLE>

                                       9
<PAGE>
ERISCO MANAGED CARE TECHNOLOGIES, INC.

    The following selected financial data of Erisco should be read in
conjunction with "Management's Discussion and Analysis of Financial Condition
and Results of Operations" and the financial statements and related notes
included elsewhere in this proxy statement. The statements of income data of
Erisco for the years ended December 31, 1999, 1998 and 1997 and the balance
sheet data as of December 31, 1999 and 1998 set forth below has been derived
from Erisco's financial statements included elsewhere in this proxy statement
which have been audited by PricewaterhouseCoopers LLP, independent auditors. The
financial data as of and for the six months ended June 30, 2000 and 1999, has
been derived from Erisco's unaudited financial statements included elsewhere in
this proxy statement. In the opinion of management, the unaudited financial
statements include all adjustments, consisting principally of normal recurring
adjustments, necessary for a fair presentation of the results of operations for
the period. Historical results are not necessarily indicative of the results of
operations to be expected for future periods and the results of interim periods
are not necessarily indicative of the results for a full year.

                           SELECTED FINANCIAL DATA OF
                    ERISCO MANAGED CARE TECHNOLOGIES, INC.,
              A WHOLLY OWNED SUBSIDIARY OF IMS HEALTH INCORPORATED
                         (DOLLAR AMOUNTS IN THOUSANDS)

<TABLE>
<CAPTION>
                                                                  FOR THE SIX
                                                                 MONTHS ENDED             FOR THE YEAR ENDED
                                                                   JUNE 30,                  DECEMBER 31,
                                                              -------------------   ------------------------------
                                                                2000       1999       1999       1998       1997
                                                              --------   --------   --------   --------   --------
                                                                  (UNAUDITED)
<S>                                                           <C>        <C>        <C>        <C>        <C>
Revenue
Software Licenses...........................................  $ 7,831    $ 6,999    $15,946    $12,539    $12,116
Software Maintenance........................................    9,207      9,536     19,357     14,784     12,895
Services....................................................    6,858      5,952     12,428      9,848      7,528
Other.......................................................      606      1,202      1,576      1,256      1,532
                                                              -------    -------    -------    -------    -------
  Total Revenue.............................................   24,502     23,689     49,307     38,427     34,071
  Cost of Revenue...........................................   14,978     14,276     29,068     25,760     21,514
                                                              -------    -------    -------    -------    -------
  Gross Profit..............................................    9,524      9,413     20,239     12,667     12,557
                                                              -------    -------    -------    -------    -------
Operating Expenses:
Research and Development....................................    1,923      1,305      2,496      1,514        888
Selling, General and Administrative.........................    5,073      4,062      7,481      6,567      5,267
Depreciation and Amortization...............................      581        635      1,239        912        769
                                                              -------    -------    -------    -------    -------
  Total Operating Expenses..................................    7,577      6,002     11,216      8,993      6,924
                                                              -------    -------    -------    -------    -------
  Operating Income..........................................    1,947      3,411      9,023      3,674      5,633
Related Party Interest Expense..............................   (1,712)    (1,329)    (2,875)    (2,761)    (2,044)
Other Income (Expense)......................................        0          0        125        (64)       (51)
                                                              -------    -------    -------    -------    -------
  Income before provision for Income taxes..................      235      2,082      6,273        849      3,538
Income tax provision........................................       99        897      2,704        389      1,507
                                                              -------    -------    -------    -------    -------
  Net Income................................................  $   136    $ 1,185    $ 3,569    $   460    $ 2,031
                                                              =======    =======    =======    =======    =======
</TABLE>

<TABLE>
<CAPTION>
                                                               JUNE 30,     DECEMBER 31,    DECEMBER 31,
                                                                 2000           1999            1998
                                                              -----------   -------------   -------------
                                                              (UNAUDITED)
<S>                                                           <C>           <C>             <C>
Cash and cash equivalents...................................    $     0       $      0        $      0
Total assets................................................     50,549         45,290          39,930
Long-term liabilities.......................................      3,103          2,897           3,230
Total shareholder's equity..................................     27,647        (27,523)        (31,092)
</TABLE>

                                       10
<PAGE>
                     UNAUDITED PRO FORMA COMBINED CONDENSED
          SELECTED CONSOLIDATED FINANCIAL DATA OF TRIZETTO AND ERISCO
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)

    The following pro forma selected consolidated financial data should be read
in conjunction with the "Unaudited Pro Forma Combined Condensed Financial
Information" included elsewhere in this proxy statement.

<TABLE>
<CAPTION>
                                                               SIX MONTHS       TWELVE MONTHS
                                                                  ENDED             ENDED
                                                              JUNE 30, 2000   DECEMBER 31, 1999
                                                              -------------   -----------------
<S>                                                           <C>             <C>
Revenues:
  Recurring revenue.........................................    $ 24,344          $ 19,448
  Non-recurring revenue.....................................      11,132            13,478
  Software license, maintenance, services and other
    revenue.................................................      24,502            49,307
                                                                --------          --------
Total revenues..............................................      59,978            82,233

Cost of Revenues:
  Recurring revenue.........................................      22,656            17,057
  Non-recurring revenue.....................................       7,756             9,751
  Software revenue..........................................      14,978            29,068
                                                                --------          --------
Total cost of revenues......................................      45,390            55,876
                                                                --------          --------

Gross profit................................................      14,588            26,357
                                                                --------          --------

Operating expenses:
  Research and development..................................       5,120             4,867
  Selling, general and administrative.......................      39,542            51,399
  Amortization of deferred stock compensation...............         892             1,057
  Write off of acquired in-process technology...............         536             4,477
                                                                --------          --------
Total operating expenses....................................      46,090            61,800
                                                                --------          --------

Loss from operations........................................     (31,502)          (35,443)

Interest income.............................................         609               527
Interest expense............................................        (183)             (256)
Other expense...............................................      (1,712)           (2,750)
                                                                --------          --------
Loss before provision for income taxes......................     (32,788)          (37,922)

Provision for income taxes..................................          99             2,491
                                                                --------          --------
Net loss....................................................    $(32,887)         $(40,413)
                                                                ========          ========
Net loss per share
  Basic.....................................................    $   1.04          $  (1.88)
                                                                ========          ========
  Diluted...................................................    $   1.04          $  (1.88)
                                                                ========          ========
  Basic.....................................................      31,700            21,519
                                                                ========          ========
  Diluted...................................................      31,700            21,519
                                                                ========          ========
</TABLE>

<TABLE>
<CAPTION>
                                                              JUNE 30, 2000
                                                              --------------
<S>                                                           <C>
Cash and cash equivalents...................................     $ 40,433
Total assets................................................      238,037
Long-term liabilities.......................................       36,578
Total shareholder's equity..................................      201,459
</TABLE>

                                       11
<PAGE>
          MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION
                     AND RESULTS OF OPERATIONS OF TRIZETTO

OVERVIEW

    TriZetto was incorporated in Delaware in May 1997. In October 1997, TriZetto
acquired all of the outstanding shares of common stock of Margolis Health
Enterprises, Inc., an entity under TriZetto's common control, in exchange for
3,716,667 shares of TriZetto common stock. In October 1997, TriZetto also
acquired all of the outstanding shares of common stock of Croghan &
Associates, Inc., an application services provider, in exchange for 5,800,895
shares of TriZetto common stock.

    In April 1998, TriZetto raised $6.0 million in gross proceeds by issuing
4,195,804 shares of TriZetto's mandatorily redeemable convertible preferred
stock to two venture capital firms. In October 1998, TriZetto raised an
additional $500,000 in gross proceeds by issuing another 349,650 shares of its
mandatorily redeemable convertible preferred stock.

    In February 1999, TriZetto simultaneously acquired Creative Business
Solutions, Inc., an Internet solutions development company, specializing in the
integration of healthcare information technology and contract programming
solutions and HealthWeb Systems, Ltd., an Internet software and portal
development company, specializing in customized healthcare applications, for a
total consideration of approximately $3.3 million, consisting of approximately
$1.4 million of cash, 655,000 shares of TriZetto common stock, a two year note
of $270,000 bearing interest at 8%, assumed liabilities of $527,000 and
acquisition costs of approximately $100,000.

    The acquisition of Creative Business Solutions and HealthWeb Systems was
accounted for using the purchase method of accounting. The excess of the
purchase price over the fair market value of the assets purchased and
liabilities assumed was $2.6 million, of which $484,000 was allocated to
acquired in-process technology, based upon an independent appraisal, and was
written-off in the year ended December 31, 1999, and $2.1 million was allocated
to goodwill and intangible assets consisting of assembled workforce and Creative
Business Solutions customer lists. The HealthWeb product is designed to solve
problems for hospitals, health plan administrators and insurance providers, such
as office administration activities, connectivity to health plans and
communications with patients. Payers will use HealthWeb for information exchange
with providers and members, such as eligibility, authorizations, referrals,
benefit verification, claims status and patient record information. At the date
of acquisition, TriZetto determined the technological feasibility of HealthWeb's
product was not established. Approximately $650,000 in research and development
had been spent up to the date of acquisition in an effort to develop the
technology to produce a commercially viable product. The future research and
development expense associated with the in-process product was estimated to be
approximately $975,000 between July 1999 and the first quarter of 2000. TriZetto
expected to introduce the final product by year-end 1999. As of December 31,
1999, the in-process product was completed and released during the fourth
quarter of 1999 at a cost of approximately $950,000. Risks which may affect the
commercialization of this product include new technologies or new products which
may make TriZetto's product obsolete. At the date of acquisition, the only
identifiable intangible assets acquired were the technology under development,
the acquired workforce and the customer lists.

    The valuation methodology used in the Creative Business Solutions and
HealthWeb Systems acquisitions included an analysis and estimation of the fair
market value and remaining economic life of both the core and in-process
technologies on a going concern basis. The valuation of the business enterprise
and the acquired in-process technology were developed by discounting projected
future net cash flows at a 35% discount rate; this reflects both the return
requirements of the market and risks inherent in the investment.

    In April 1999, TriZetto acquired certain assets and liabilities of
Management and Technology Solutions, Inc., a physician services organization, in
exchange for 60,000 shares of TriZetto common

                                       12
<PAGE>
stock. The assets acquired from Management and Technology Solutions included
property and equipment, intellectual property, consisting of patents, trademarks
and licenses, computer software and software licenses. The liabilities assumed
included lease obligations, a note payable for a software license and other
accrued liabilities.

    In April 1999, TriZetto raised $4.5 million in gross proceeds by issuing
1,730,770 shares of mandatorily redeemable convertible preferred stock to three
venture capital firms.

    In May 1999, TriZetto entered into an agreement with Caremark Rx, Inc.
(formerly known as MedPartners, Inc.) to provide hosted information technology
services to Caremark Rx with respect to approximately 1,800 physicians while
Caremark Rx terminates its relationships with these groups. In addition,
TriZetto purchased hardware, furniture and fixtures and a software license for
$2.4 million from Caremark Rx and paid a software license transfer fee of
$280,000. The initial term of the agreement expired on December 31, 1999.
However, Caremark Rx did not complete the disassociation process by
December 31, 1999 and subsequently the term of the agreement was extended
through, and expired on, June 30, 2000.

    As of June 30, 2000, 33% of the physicians TriZetto initially serviced under
the Caremark Rx agreement had chosen alternative providers of information
technology services. As of June 30, 2000, TriZetto had negotiated multi-year
contracts with 15 disassociated groups, representing approximately 1,216
physicians, or 67% of the total physicians available at the time the Caremark Rx
agreement was signed.

    In October 1999, TriZetto completed its initial public offering of 4,480,000
shares of common stock, including 630,000 shares in connection with the exercise
of underwriters' over-allotment option, at a price of $9.00 per share, that
raised approximately $36.0 million, net of underwriting discounts, commissions
and other offering costs. In addition, in connection with the offering, 350,000
shares of common stock were sold by a selling stockholder at $9.00 per share,
for which TriZetto received no proceeds. Upon the closing of the offering, all
of TriZetto's mandatorily redeemable convertible preferred stock converted into
approximately 6,276,000 shares of common stock.

    In November 1999, TriZetto acquired all the outstanding shares of Novalis
Corporation. The purchase price of approximately $18.7 million consisted of cash
in the amount of approximately $5.0 million, 549,786 shares of common stock with
a value of $16.37 per share, assumed liabilities of $1.9 million and acquisition
costs of approximately $2.8 million. Of the 549,786 shares of common stock
issued in connection with this acquisition, 366,524 shares are being held in
escrow until the resolution of certain pre-acquisition contingencies. Of the
total purchase price, $923,000 was allocated to in-process technology and the
remainder of the purchase price was allocated to assets acquired and liabilities
assumed.

    The acquisition of Novalis was accounted for using the purchase method of
accounting. The excess of the purchase price over the fair market value of the
assets purchased and liabilities assumed was $13.5 million, of which $923,000
was allocated to acquired in-process technology, based upon an independent
appraisal, and was written-off in the year ended December 31, 1999, and
$12.6 million was allocated to goodwill and intangible assets consisting of
assembled workforce, core technology and customer lists. As of the acquisition
date, Novalis was developing several enhancements to its proprietary software
products. Approximately $535,000 in research and development had been spent up
to the date of the acquisition in an effort to develop the next releases of the
in-process and core technology. The future research and development expense
associated with the in-process and core technology was estimated to be
approximately $490,000. The in-process and core technology was

                                       13
<PAGE>
scheduled to be released by June 30, 2000. The proprietary software products of
Novalis includes systems which manage the following:

    - claims processing--patient profiles, claims processing, provider contracts
      and other core data processing and storage functions

    - medical management--allows clients to track utilization management,
      patient referrals, authorizations and case management

    - provider credentialing management--allows clients to verify a physician's
      credentials

    - data warehousing--produces standardized ad hoc reports that allow in-depth
      analysis of a business

    In valuing Novalis' developed, in-process and core technologies, TriZetto
utilized the relief from royalty method. The relief from royalty method assumes
that the value of the intangible asset is estimated by quantifying the royalties
saved due to TriZetto's ownership of the software. A revenue stream for the
asset was estimated based on Novalis' total revenue projections over its
estimated life. An appropriate royalty rate is then applied to the forecasted
revenue to estimate the pre-tax income associated with the asset. This income
stream was tax effected and discounted to its present value to estimate the
value of the developed, in-process and core technologies. For purposes of this
analysis, TriZetto used 15%, 20% and 25% discount rates for the developed,
in-process and core technologies, respectively. These discount rates are
consistent with the risks inherent in achieving the projected cash flows.

    In December 1999, TriZetto acquired all of the outstanding shares of Finserv
Health Care Systems, Inc. Finserv is a billing and accounts receivable
management company focusing on the outpatient sector of the healthcare industry.
The purchase price of approximately $4.8 million consisted of cash in the amount
of approximately $1.8 million, 48,998 shares of common stock with a value of
$30.61 per share, assumed liabilities of $1.1 million, and acquisition costs of
approximately $0.4 million. Of the 48,998 shares of TriZetto common stock which
were issued in connection with this acquisition, 20,000 shares are being held in
escrow until the resolution of certain pre-acquisition contingencies.

    In January 2000, TriZetto acquired all of the outstanding shares of
Healthcare Media Enterprises, Inc. (HME). HME's primary business focus is on
software development, especially relating to the Internet, web design, and
business to business portals. The purchase price of approximately $5.4 million
consisted of cash in the amount of approximately $1.4 million, 87,359 shares of
common stock with a value of $40.06 per share, assumed liabilities of $191,000
and acquisition costs of approximately $316,000. Of the total purchase price,
$536,000 was allocated to in-process technology and the remainder of the
purchase price was allocated to assets acquired and liabilities assumed. Of the
87,359 shares of TriZetto common stock which were issued in connection with this
acquisition, 17,472 shares are being held in escrow until the resolution of
certain pre-acquisition contingencies. The acquisition of HME was accounted for
using the purchase method of accounting and accordingly, the purchase price was
allocated to the tangible and intangible assets acquired and liabilities assumed
on the basis of their fair market values on the acquisition date.

    TriZetto's revenues are classified into two categories: recurring or
multi-year contractually based revenue, and revenue generated via non-recurring
agreements. Since inception, the relative percentages of non-recurring revenue
and recurring revenue were 41% and 59%, respectively. For the six months ended
June 30, 2000, the relative percentages of recurring revenue and non-recurring
revenue were 68% and 32%, respectively. As TriZetto signs additional multi-year
application services contracts, TriZetto expect the relative percentage of
recurring revenue to continue to increase.

    Recurring revenue is subscription based and billed on a monthly basis over a
contract term of typically three to five years. The amount billed monthly is
based on units of volume, such as numbers

                                       14
<PAGE>
of physicians, members or desktops covered by each contract. Recurring revenue
is recognized ratably over the term of the contract, and cash received in excess
of revenue recognized is recorded as deferred revenue. Non-recurring revenue is
billed on either a time and materials or a fixed fee basis, and is recognized as
the non-recurring services are performed.

    Cost of revenues are those costs related to the products and services
TriZetto provides to its customers, and costs associated with the operation and
maintenance of the Customer Connectivity Centers. These costs include salaries
and related expenses for consulting personnel, Customer Connectivity Centers
personnel, customer support personnel, application software license fees,
telecommunications and maintenance costs.

    Research and development expenses are salaries and related expenses
associated with the development of technologies, applications and services and
include compensation paid to engineering personnel and fees to outside
contractors and consultants.

    Selling, general and administrative expenses consist primarily of salaries
and related expenses for sales, account management, marketing, administrative,
finance, legal, human resources and executive personnel, commissions, expenses
for marketing programs and trade shows and fees for professional services.
TriZetto anticipates that sales, general and administrative costs will continue
to increase in absolute dollars as it adds sales, marketing and administrative
personnel, increases its marketing and promotional activities and incurs costs
related to being a public company, such as directors' and officers' insurance
premiums and professional fees.

    As of June 30, 2000, TriZetto recorded deferred compensation related to
options granted to employees in the total amount of $6.9 million, representing
the difference between the deemed fair value of TriZetto common stock, as
determined for accounting purposes, and the exercise price of the options at the
date of grant. Of this amount, approximately $22,000 had been amortized in 1998,
approximately $1.1 million had been amortized in 1999 and approximately $892,000
had been amortized for the six months ended June 30, 2000. Future amortization
of expenses arising out of options granted through the date hereof is estimated
to be $1.7 million for the year ended December 31, 2000, $1.7 million for the
year ended December 31, 2001, $1.7 million for the year ended December 31, 2002,
and $672,000 for the year ended December 31, 2003. TriZetto amortizes the
deferred compensation charge over the vesting period of the underlying option.

OPERATING DATA

    The following table combines the operating data of Croghan &
Associates, Inc. (now known as TriZetto Application Services, Inc.) for the nine
months ended September 30, 1997 and TriZetto for the period from May 27, 1997
(date of inception) to December 31, 1997 in order to facilitate management's
discussion of financial results. Certain costs and expenses presented in the
statement of operations data of Croghan & Associates represents allocations and
management estimates. As a result, the statement of operations data presented
for Croghan & Associates is not strictly comparable to those of subsequent
periods and may not be indicative of the results of operations that would have

                                       15
<PAGE>
been achieved had the Croghan & Associates business operated as a non-affiliated
entity during such period.

                                 OPERATING DATA
                                 (IN THOUSANDS)

<TABLE>
<CAPTION>
                                                                           HISTORICAL
                                                        -------------------------------------------------
                                                                                           TRIZETTO
                                                        CROGHAN & ASSOCIATES, INC.       MAY 27, 1997
                                                            NINE MONTHS ENDED        (DATE OF INCEPTION)
                                                            SEPTEMBER 30, 1997       TO DECEMBER 31, 1997   COMBINED
                                                        --------------------------   --------------------   ---------
<S>                                                     <C>                          <C>                    <C>
Revenues:
  Recurring revenue...................................            $ 3,881                   $1,191           $ 5,072
  Non-recurring revenue...............................                 --                    1,328             1,328
                                                                  -------                   ------           -------
Total revenues........................................              3,881                    2,519             6,400
                                                                  -------                   ------           -------
Cost of revenues:
  Recurring revenue...................................              3,609                    1,250             4,859
  Non-recurring revenue...............................                 --                      422               422
                                                                  -------                   ------           -------
Total cost of revenues................................              3,609                    1,672             5,281
                                                                  -------                   ------           -------
Gross profit..........................................                272                      847             1,119
                                                                  -------                   ------           -------
Operating expenses:
  Selling, general and administrative.................              2,415                      672             3,087
                                                                  -------                   ------           -------
Income (loss) from operations.........................             (2,143)                     175            (1,968)
Interest income.......................................                 15                       15                30
Interest expense......................................                (84)                     (13)              (97)
                                                                  -------                   ------           -------
  Income (loss) before provision for income taxes and
    extraordinary item................................             (2,212)                     177            (2,035)
Provision for income taxes............................                 --                       74                74
                                                                  -------                   ------           -------
Income (loss) before extraordinary item...............             (2,212)                     103            (2,109)
Extraordinary item:
  Gain on forgiveness of debt.........................              1,000                       --             1,000
                                                                  -------                   ------           -------
Net income (loss).....................................            $(1,212)                  $  103           $(1,109)
                                                                  =======                   ======           =======
</TABLE>

RESULTS OF OPERATIONS

SIX MONTHS ENDED JUNE 30, 2000 COMPARED TO SIX MONTHS ENDED JUNE 30, 1999

    REVENUES.  Total revenues in the first six months of 2000 increased
$22.8 million, or 179%, to $35.5 million from $12.7 million in the first six
months of 1999. The majority of this increase was due to the overall growth in
both recurring revenue and consulting revenue throughout the six month period
ended June 30, 2000. Additionally, the acquisitions of Novalis in
November 1999, Finserv in December 1999, and HME in January 2000 generated
approximately $11.9 million in incremental revenue for the first six months of
2000.

    Recurring revenue in 2000 increased $18.1 million, or 293%, to
$24.3 million from $6.2 million for the same period in 1999. Of this increase,
$8.2 million was generated from the acquisitions of Novalis and Finserv. The
remaining $9.9 million increase was related to the overall increase in demand
for TriZetto's services due to expansion of its service offerings.

    Non-recurring revenue in the first six months of 2000 increased
$4.6 million, or 71%, to $11.1 million from $6.5 million for the same period in
1999. This increase was primarily due to the acquisition of Novalis, Finserv and
HME which resulted in incremental non-recurring revenue of $3.8 million for the
six months ended June 30, 2000.

                                       16
<PAGE>
    COST OF REVENUES.  Cost of revenues in the first six months of 2000
increased $21.3 million, or 233%, to $30.4 million from $9.1 million in the
first six months of 1999. This increase was due to the costs incurred to support
the overall expansion of TriZetto's business, including TriZetto's acquisitions
of Novalis in November 1999, Finserv in December 1999, and HME in January 2000.
As a percentage of total revenues, cost of revenues approximated 86% in the
first six months of 2000 and 72% in the first six months of 1999.

    Cost of recurring revenue in the first six months of 2000 increased
$17.6 million, or 350%, to $22.7 million from $5.0 million in the first six
months of 1999. This increase represented the incremental expenses for personnel
and facilities costs incurred to support the growing application services
provider business, including the incremental costs associated with the
acquisitions of Novalis and Finserv. As a percentage of recurring revenue, cost
of recurring revenue approximated 93% in the first six months of 2000, and 81%
in the first six months of 1999.

    Cost of non-recurring revenue in the first six months of 2000 increased
$3.6 million, or 89%, to $7.8 million from $4.1 million in the first six months
of 1999. This increase was due to incremental costs required to support
increasing demand for TriZetto's consulting services in the first six months of
2000. As a percentage of non-recurring revenue, cost of non-recurring revenue
approximated 70% for the first six months of 2000 and 63% for the same period in
1999.

    RESEARCH AND DEVELOPMENT EXPENSES.  Research and development expenses in the
first six months of 2000 increased $2.8 million, or 627%, to $3.2 million from
$440,000 for the same period in 1999. The increase was primarily due to a
significant increase in the amount of resources engaged in the development of
TriZetto's applications and services. Expenses relating to system enhancements
from which TriZetto derives revenue are not classified as research and
development and are included in cost of revenues. As a percentage of total
revenues, research and development expenses approximated 9% for the first six
months of 2000 and 4% for the same period in 1999.

    SELLING, GENERAL AND ADMINISTRATIVE EXPENSES.  Selling, general and
administrative expenses in the first six months of 2000 increased
$14.3 million, or 461%, to $17.4 million from $3.1 million for the same period
in 1999. This increase was due primarily to expansion of the sales force, staff
growth in management and administrative support areas, and expansion of related
office space. As a percentage of total revenues, selling, general and
administrative expenses approximated 49% for the first six months of 2000 and
24% for the same period in 1999.

    AMORTIZATION OF DEFERRED STOCK COMPENSATION.  Amortization of deferred stock
compensation increased $677,000 in the first six months of 2000 to $892,000 from
$215,000 for the same period in 1999. This amount represents the allocated
portion of the difference between the deemed fair value of TriZetto common stock
and the exercise price of stock options granted to TriZetto's employees.

    WRITE OFF OF ACQUIRED IN-PROCESS TECHNOLOGY.  Write off of Acquired
In-Process Technology increased $52,000 in the first six months of 2000 to
$536,000 from $484,000 for the same period in 1999. The expense related to the
write off of acquired in-process technology in the first six months of 2000 was
the result of TriZetto's acquisition of HME in January 2000, in which the excess
of the purchase price over the fair market value of the assets assumed was
$5.0 million. Of this amount, $536,000 was allocated to acquired in-process
technology, based upon an independent appraisal, and was expensed in the six
months ended June 30, 2000. TriZetto's acquisition of Creative Business
Solutions and HealthWeb Systems in February 1999 resulted in an excess of
purchase price over the fair market value of the assets purchased and
liabilities assumed of $2.5 million. Of this amount, $484,000 was allocated to
acquired in-process technology, based upon an independent appraisal, and was
written-off in the six months ended June 30, 1999.

                                       17
<PAGE>
    INTEREST INCOME.  Interest income in the first six months of 2000 increased
$533,000 or 701%, to $609,000 from $76,000 in the first six months of 1999. The
increase was due to the increase in cash available for investing due to proceeds
received from TriZetto's initial public offering.

    INTEREST EXPENSE.  Interest expense in the first six months of 2000
increased $83,000, or 83%, to $183,000 from $100,000 for the same period in
1999. The increase was due to additional borrowings on TriZetto's line of credit
and new capital lease obligations.

    PROVISION FOR (BENEFIT OF) INCOME TAXES.  Provision for income tax in the
first six months of 2000 was zero, a decrease of $28,000 from an income tax
provision of $28,000 for the same period in 1999. An income tax provision was
not recorded in the first six months of 2000 due to TriZetto's pre-tax loss.

YEAR ENDED DECEMBER 31, 1999 COMPARED TO THE YEAR ENDED DECEMBER 31, 1998.

    REVENUES.  Total revenues in 1999 increased $21.5 million, or 188%, to
$32.9 million from $11.4 million in 1998. The majority of this increase was due
to the overall growth in both recurring revenue and non-recurring revenue
throughout the year ended December 31, 1999. Additionally, the acquisitions of
Creative Business Solutions and HealthWeb in February 1999 and Novalis in
November 1999 generated approximately $3.5 million and $1.9 million,
respectively of incremental revenue in 1999.

    Recurring revenue in 1999 increased $14.1 million, or 267%, to
$19.4 million from $5.3 million in 1998. Incremental revenue generated as a
result of TriZetto's May 1999 agreement to provide hosted information technology
services to Caremark Rx with respect to approximately 1,800 physicians
represented $7.4 million of the increased revenue. Additionally, the acquisition
of Novalis in November 1999 generated approximately $1.2 million of recurring
revenue in 1999.

    Non-recurring revenue in 1999 increased $7.4 million, or 120%, to
$13.5 million from $6.1 million in 1998. This increase reflected an overall
increase in demand for TriZetto's non-recurring services throughout the year.
Additionally, the acquisition of Novalis in November 1999 generated
approximately $700,000 of the increased revenue.

    COST OF REVENUES.  Cost of revenues in 1999 increased $19.3 million, or
260%, to $26.8 million from $7.5 million in 1998. This increase was due to the
costs incurred to support the overall expansion of TriZetto's business. As a
percentage of total revenues, cost of revenues approximated 81% in 1999 and 65%
in 1998.

    Cost of recurring revenue in 1999 increased $13.1 million, or 330%, to
$17.1 million from $4.0 million in 1998. This increase represented the
incremental expenses for personnel and facilities costs incurred to support the
growing application services provider business, including the incremental costs
associated with the Caremark Rx contract signed in May 1999. Additionally,
incremental infrastructure costs were required in 1999 to support the transition
from TriZetto's former data center to the new Customer Connectivity Center in
Englewood, Colorado. As a percentage of recurring revenue, cost of recurring
revenue approximated 88% in 1999 and 75% in 1998.

    Cost of non-recurring revenue in 1999 increased $6.3 million, or 179%, to
$9.8 million from $3.5 million in 1998. This increase was due to incremental
costs required to support increasing demand for TriZetto's non-recurring
services in 1999. As a percentage of non-recurring revenue, cost of
non-recurring revenue approximated 72% in 1999 and 57% in 1998.

    RESEARCH AND DEVELOPMENT EXPENSES.  Research and development expenses
increased $1.3 million, or 119%, to $2.4 million from $1.1 million in 1998. The
majority of this increase relates to the development of TriZetto's HealthWeb
business to business portal and its e-applications. Expenses relating to system
enhancements from which TriZetto derives revenue are not classified as research
and

                                       18
<PAGE>
development and are included in cost of revenues. As a percentage of total
revenues, research and development expenses approximated 7% in 1999 and 9% in
1998.

    SELLING, GENERAL AND ADMINISTRATIVE EXPENSES.  Selling, general and
administrative expenses in 1999 increased $6.8 million, or 236%, to
$9.7 million from $2.9 million in 1998. This increase was due primarily to
expansion of the sales force, staff growth in management and administrative
support areas, and expansion of related office space. As a percentage of total
revenues, selling, general and administrative expenses approximated 29% in 1999
and 25% in 1998.

    AMORTIZATION OF DEFERRED STOCK COMPENSATION.  Amortization of deferred stock
compensation was $1.1 million in 1999 from $22,000 in 1998. Deferred stock
compensation represents the allocated portion of the difference between the
deemed fair value of TriZetto common stock and the exercise price of stock
options granted to TriZetto's employees.

    WRITE OFF OF ACQUIRED IN-PROCESS TECHNOLOGY.  TriZetto's acquisitions of
Creative Business Solutions and HealthWeb in February 1999 resulted in an excess
of purchase price over the fair market value of the assets purchased and
liabilities assumed of $2.5 million. Of this amount, $484,000 was allocated to
acquired in-process technology, based upon an independent appraisal, and was
written-off in 1999. In addition, TriZetto's acquisition of Novalis in
November 1999 resulted in an excess purchase price over the fair market value of
the assets purchased and liabilities assumed of $13.6 million. Of this amount,
$923,000 was allocated to acquired in process technology, based on an
independent appraisal and was written off in 1999.

    INTEREST INCOME.  Interest income in 1999 increased $317,000, or 151%, to
$527,000 from $210,000 in 1998. The increase was due to the incremental cash
invested in 1999 resulting from $4.5 million in gross proceeds TriZetto raised
in April 1999, and the full year impact of TriZetto's investing approximately
$6.0 million in gross proceeds it raised in April 1998. The increase is also a
result of the investment of the net proceeds of $36.0 million raised during the
initial public offering in October 1999.

    INTEREST EXPENSE.  Interest expense in 1999 increased $204,000, or 392%, to
$256,000 from $52,000 in 1998. The increase is due to interest paid on notes
payable issued in February 1999 in connection with the purchase of HealthWeb and
Creative Business Solutions, notes payable in connection with TriZetto's
purchase of software applications licenses, and capital lease obligations for
the purchase of computer and other office equipment.

    PROVISION FOR INCOME TAXES.  Provision for income tax in 1999 decreased
$295,000 to a tax benefit of $213,000 from a tax expense of $82,000 in 1998. The
benefit was primarily generated from the pre-tax loss, partially offset by the
recording of a valuation allowance on the deferred tax assets.

YEAR ENDED DECEMBER 31, 1998 COMPARED TO THE COMBINED YEAR ENDED DECEMBER 31,
  1997

    REVENUES.  Total revenues in 1998 increased $5.0 million, or 79%, to
$11.4 million from $6.4 million in 1997. This increase was primarily due to a
full year of non-recurring service revenue in 1998 as compared to seven months
of non-recurring service revenue in 1997.

    Recurring revenue in 1998 increased $200,000, or 4%, to $5.3 million from
$5.1 million in 1997. Non-recurring revenue in 1998 increased $4.8 million, or
362%, to $6.1 million from $1.3 million in 1997. This increase was primarily the
result of the recognition of a full year of non-recurring revenue in 1998, with
approximately seven months of non-recurring revenue recognized in 1997, 1998
non-recurring revenues also reflected the growth and demand for TriZetto's
non-recurring services from inception in May 1997 through the year ended
December 31, 1998.

    COST OF REVENUES.  Cost of revenues in 1998 increased $2.2 million, or 41%,
to $7.5 million from $5.3 million in 1997. As a percentage of total revenues,
cost of revenues approximated 65% in 1998 and 83% in 1997.

                                       19
<PAGE>
    Cost of recurring revenue in 1998 decreased $900,000, or 18%, to
$4.0 million from $4.9 million in 1997. This decrease was primarily the result
of the elimination of amortization of internally developed software as of the
date of the acquisition of Croghan & Associates on October 1, 1997. As a
percentage of recurring revenue, cost of recurring revenue approximated 75% in
1998 and 96% in 1997.

    Cost of non-recurring revenue in 1998 increased $3.1 million, or 727%, to
$3.5 million from $422,000 in 1997. This increase was primarily the result of a
full year of non-recurring operations occurring in 1998 with approximately seven
months of non-recurring operations occurring in 1997. The 1998 increase also
reflected the costs required to support the growing business demands for
TriZetto's non-recurring services during that period. As a percentage of
non-recurring revenue, cost of non-recurring revenue approximated 57% in 1998
and 32% in 1997.

    RESEARCH AND DEVELOPMENT EXPENSES.  Research and development expenses, which
excluded development expenses that were included in cost of revenues, in 1998
increased to $1.1 million from $0 in 1997. The increase was primarily due to
Year 2000 remediation of TriZetto's owned software that is used in the provision
of application services to TriZetto's customers. As a percentage of total
revenues, research and development expense approximated 9% in 1998.

    SELLING, GENERAL AND ADMINISTRATIVE EXPENSES.  Selling, general and
administrative expenses in 1998 decreased $202,000, or 7%, to $2.9 million from
$3.1 million in 1997. During 1997, Croghan & Associates had recognized
approximately $350,000 of amortization expense related to goodwill. This expense
was eliminated as of the acquisition of Croghan & Associates on October 1, 1997.
As a percentage of total revenues, selling, general and administrative expenses
approximated 25% in 1998 and 48% in 1997.

    AMORTIZATION OF DEFERRED STOCK COMPENSATION.  Amortization of deferred stock
compensation increased $22,000 in 1998 from $0 in 1997. This amount represents
the allocated portion of the difference between the deemed fair value of our
common stock and the exercise price of stock options granted to TriZetto's
employees.

    INTEREST INCOME.  Interest income in 1998 increased $180,000, to $210,000
from $30,000 in 1997. The increase was due to incremental cash available for
investments resulting from approximately $6,000,000 in gross proceeds raised in
the April 1998 private financing.

    INTEREST EXPENSE.  Interest expense in 1998 decreased $45,000, or 46%, to
$52,000 from $97,000 in 1997. The decrease was due to the forgiveness of
$1.0 million of debt in 1997.

    PROVISION FOR INCOME TAXES.  Provision for income tax in 1998 increased
$8,000, or 11%, to $82,000 from $74,000 in 1997. The increase was primarily due
to an increase in tax deductions for book purposes in 1998 not recognizable for
tax purposes.

LIQUIDITY AND CAPITAL RESOURCES

    Since inception TriZetto has financed the operations primarily through a
combination of cash from operations, private financings and an initial public
offering of TriZetto common stock. As of June 30, 2000, TriZetto had
approximately $11.9 million of cash, cash equivalents, short-term investments
and long-term investments.

    Cash used in operating activities in the six months ended June 30, 2000 was
$11.7 million. Cash used during this period was primarily attributable to net
losses of $16.5 million, which was offset by $4.8 million, consisting of
depreciation and amortization, amortization of deferred stock compensation,
write off of in-process technology and other changes in operating asset and
liability accounts. These losses were principally related to increased research
and development expenses and sales, general and

                                       20
<PAGE>
administrative expenses. In addition, the losses were generated by the expansion
of TriZetto's infrastructure to support growing demand of its recurring line of
business.

    Cash used in investing activities in the six months ended June 30, 2000 was
$1.9 million. Cash used during this period was primarily the result of
TriZetto's purchase of $3.0 million in property and equipment and software
licenses, the $1.5 million cash portion (net of cash acquired) of TriZetto's
acquisition of HME in January 2000, the $1.2 million cash payment of acquisition
costs related to Erisco, and TriZetto's purchase of $2.2 million of short-term
and long-term investments. These expenditures were partially offset by the
liquidation of $6.0 million of TriZetto's short-term and long-term investments.

    Cash provided in financing activities in the six months ended June 30, 2000
was $3.2 million. The cash provided during this period was primarily the result
of proceeds from line of credit of $2.8 million, proceeds from new capital lease
obligations of $1.2 million, and the issuance of common stock related to
employee exercise of stock options and employee purchase of common stock of
$687,000, offset by principal payments on notes payable and capital lease
obligations of $1.4 million.

    In March 1999, TriZetto entered into a revolving line of credit with a
financial institution. In October 1999, TriZetto entered into a subsequent
agreement which increased the amount available under the line of credit. The
total amount available for borrowings under the line of credit is $3.0 million
and expires in November 2000. In June 2000, TriZetto entered into a subsequent
agreement whereby the line of credit is collateralized by a secured interest of
$3.0 million. Borrowings under the line of credit bear interest at the bank's
LIBOR rate plus 2.25%. Interest is payable monthly as it accrues. The credit
agreement contains certain covenants that TriZetto must adhere to during the
term of the agreement, including restrictions on the payment of dividends. As of
June 30, 2000, TriZetto had outstanding borrowings on the line of credit of
$2.7 million and letters of credit approximating $319,000.

    In December 1999, TriZetto entered into a line of credit with a financial
institution. This line of credit was specifically established to finance
computer equipment purchases. The line of credit has a total capacity of
$2.0 million and expires in December 2000. Individual borrowings under the line
of credit have a fixed interest rate between 9% and 11% per year. Payments
including principal and interest are made monthly. Borrowings under the line of
credit at June 30, 2000 totaled approximately $1.9 million, and are
collateralized by substantially all of TriZetto's assets.

    TriZetto believes existing cash balances, cash generated from operations and
future borrowings will be sufficient to meet its working capital and capital
requirements for at least the next 12 months.

RECENT ACCOUNTING PRONOUNCEMENTS

    In June 1998, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards No. 133 ("SFAS 133"), "Accounting for Derivative
Instruments and Hedging Activities," which established accounting and reporting
standards for derivative instruments and hedging activities. SFAS 133 is
effective for fiscal years beginning after June 15, 2000. It requires that an
entity recognizes all derivatives as either assets or liabilities in the
statement of financial position and measure those instruments at fair value. To
date, TriZetto has not engaged in derivative and hedging activities.

    In December 1999, the Securities and Exchange Commission ("SEC") issued
Staff Accounting Bulletin No. 101 ("SAB 101"), Revenue Recognition, which
outlines the basic criteria that must be met to recognize revenue and provides
guidance for presentation of revenue and for disclosure related to revenue
recognition policies in financial statements filed with the SEC. TriZetto
believes that adopting SAB 101 will not have a material impact on its financial
position or results of operations.

                                       21
<PAGE>
    In March 2000, the FASB issued Interpretation No. 44, or FIN 44, "Accounting
for Certain Transactions Involving Stock Compensation," which is an
interpretation of Accounting Principal Board No. 25. This interpretation
clarifies:

    - the definition of employee for purposes of applying Opinion 25, which
      deals with stock compensation issues;

    - the criteria for determining whether a plan qualifies as a noncompensatory
      plan;

    - the accounting consequence of various modifications to the terms of a
      previously fixed stock option or award; and

    - the accounting for an exchange of stock compensation awards in a business
      combination.

    This interpretation is effective July 1, 2000, but certain conclusions in
this interpretation cover specific events that occur after either December 15,
1998, or January 12, 2000. To the extent that this interpretation covers events
occurring during the period after December 15, 1998, or January 12, 2000, but
before the effective date of July 1, 2000, the effects of applying this
interpretation are recognized on a prospective basis from July 1, 2000. The
adoption of FIN 44 does not have a material impact on TriZetto's financial
statements.

QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

    Market risk represents the risk of loss that may impact TriZetto's financial
position, operating results or cash flows due to adverse changes in financial
and commodity market prices and rates. TriZetto is exposed to market risk due to
changes in United States interest rates. This exposure is directly related to
TriZetto's normal operating and funding activities. Historically and as of
June 30, 2000, TriZetto has not used derivative instruments or engaged in
hedging activities.

    The interest payable on TriZetto's $3.0 million credit facility is variable,
based on the LIBOR rate, and, therefore, affected by changes in market interest
rates. As of June 30, 2000, the amount outstanding on TriZetto's credit facility
was $2.7 million and letters of credit approximating $300,000 had been written
against the credit facility. The line of credit expires in November 2000.
Changes in interest rates have no impact on TriZetto's other debt as all of its
other notes are at fixed interest rates between 8% and 10%. TriZetto manages
interest rate risk by investing excess funds in cash equivalents and short-term
investments bearing variable interest rates, which are tied to various market
indices. As a result, TriZetto does not believe that near-term changes in
interest rates will result in a material effect on its future earnings, fair
values or cash flows.

                                       22
<PAGE>
          MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION
      AND RESULTS OF OPERATIONS OF ERISCO MANAGED CARE TECHNOLOGIES, INC.

OVERVIEW

    On May 16, 2000, IMS HEALTH and TriZetto jointly announced a strategic
alliance under which TriZetto will acquire Erisco for TriZetto stock. Further,
IMS HEALTH and TriZetto will enter into technology and data agreements. The
transaction supercedes the merger of TriZetto and IMS HEALTH announced
March 29, 2000, which has been terminated by the consent of both Board of
Directors.

    Erisco has been a leading provider of application software and services to
the healthcare industry for over three decades. Erisco's legacy system
solutions, ClaimFacts and GroupFacts, were designed to help indemnity insurance
carriers, third party administrators and self-administered corporations manage
the administration of group health and life insurance products.

    Erisco's primary offering, Facets, is a client/server system which
integrates advanced technology with clinical information to help managed care
organizations ("MCOs") provide high-quality, cost-effective solutions in their
marketplace. Primary markets include health maintenance organizations,
managed-indemnity carriers and specialized MCO's.

    This discussion and analysis relates to ERISCO Managed Care
Technologies, Inc. and should be read in conjunction with the accompanying
financial statements and related notes. The financial statements have been
prepared using IMS HEALTH's historical basis in assets and liabilities and
historical results of operations related to Erisco's business. The financial
statements generally reflect the financial position, results of operations and
cash flows of Erisco as if it were a separate entity for all periods presented.
The financial statements include allocations of certain IMS HEALTH corporate and
other expenses (including cash management, legal, accounting, tax, employee
benefits, insurance services, data services and other corporate overhead)
relating to Erisco's business for the years ended December 31, 1999, 1998 and
1997 and the six months ended June 30, 2000 and 1999. Management believes these
allocation methods are reasonable. The financial information included herein may
not necessarily reflect the financial position, results of operations and cash
flows of Erisco in the future or what they would have been if Erisco had been a
separate entity during the periods presented.

RESULTS OF OPERATIONS

SIX MONTHS ENDED JUNE 30, 2000 COMPARED WITH SIX MONTHS ENDED JUNE 30, 1999

    REVENUES.  Software license revenue for the six months ended June 30, 2000
increased 11.9% to $7,831,000 compared with $6,999,000 for the same period in
1999. Revenue for the six months ended June 30, 2000 reflects the growing market
acceptance of the Facets product line and the benefits of an expanded sales and
marketing organization.

    Software maintenance revenue for the six months ended June 30, 2000
decreased 3.5% to $9,207,000 compared with $9,536,000 for the same period in
1999. Revenue for the six months ended June 30, 2000 reflects first quarter
attrition from the legacy product line, offset by growth in the Facets customer
base.

    Services revenue for the six months ended June 30, 2000 increased 15.2% to
$6,858,000 compared with $5,952,000 for the same period in 1999. Revenue for the
six months ended June 30, 2000 reflects the added professional services
delivered to a growing Facets customer base.

    Other revenue for the six months ended June 30, 2000 decreased 49.6% to
$606,000 compared with $1,202,000 for the same period in 1999. Revenue for the
six months ended June 30, 2000 reflects lower hardware/software value added
reseller (VAR) sales during the period.

                                       23
<PAGE>
    COSTS OF REVENUE.  Costs of revenue for the six months ended June 30, 2000
were $14,978,000 compared with $14,276,000 for the same period in 1999, an
increase of 4.9%. The increase is primarily due to higher support expenses
related to the growing Facets customer base.

    GROSS MARGIN.  Gross Margin for the six months ended June 30, 2000 was 38.9%
compared with 39.7% for the same period in 1999. The Gross Margin decrease was
related to lower software maintenance revenue.

    RESEARCH AND DEVELOPMENT EXPENSES.  Research and Development expenditures in
the six months ended June 30, 2000 were $1,923,000 compared with $1,305,000 for
the same period in 1999, an increase of 47.4%. The increase is primarily due to
added resources related to Facets development.

    SELLING, GENERAL AND ADMINISTRATIVE EXPENSES.  Selling, general and
administrative costs in the six months ended June 30, 2000 were $5,073,000
compared with $4,062,000 for the same period in 1999, an increase of 24.9%. This
increase relates to an expanded marketing and sales organization.

    DEPRECIATION AND AMORTIZATION.  Depreciation and amortization decreased to
$581,000, or 8.5%, in the six months ended June 30, 2000 compared with $635,000
in the comparable period of 1999, due primarily to leasehold improvements in the
New York office becoming fully amortized during 1999.

    OPERATING INCOME.  Operating income in the six months ended June 30, 2000
was $1,947,000 compared with $3,411,000 for the same period in 1999, a decrease
of 42.9%, due primarily to the higher operating costs and offset by the increase
in revenue, all as noted above.

    RELATED PARTY INTEREST EXPENSE.  Related party interest expense for the six
months ended June 30, 2000 was $1,712,000 compared with $1,329,000 for the same
period in 1999, an increase of 28.8%. These amounts reflect higher interest
expense under the Company's note payable to Spartan Leasing Corporation.

    INCOME TAX PROVISION.  Erisco's tax provision, calculated on a
separate-company basis, was $99,000 for the six months ended June 30, 2000,
compared with $897,000 for the comparable period in 1999, a decrease of 89%. The
effective tax rate of 42.1% is higher than the U.S. federal statutory tax rate,
principally due to state and local income taxes.

    NET INCOME.  Net income for the six months ended June 30, 2000 was $136,000,
compared with net income of $1,185,000 for the same period in 1999, a decrease
of 88.5% due primarily to the after-tax impact of the operating income discussed
above.

YEAR ENDED DECEMBER 31, 1999 COMPARED WITH THE YEAR ENDED DECEMBER 31, 1998

    REVENUES.  Software license revenue for the fiscal year ended December 31,
1999 increased 27.2% to $15,946,000 compared with $12,539,000 in fiscal year
1998. Revenue for the year ended December 31, 1999 reflects increased customer
sales of the Facets product line.

    Software maintenance revenue for the fiscal year ended December 31, 1999
increased 30.9% to $19,357,000 compared with $14,784,000 in fiscal year 1998.
Revenue for year ended December 31,1999 reflects the general overall growth in
the Facets customer base over the prior year.

    Services revenue for the fiscal year ended December 31, 1999 increased 26.2%
to $12,428,000 compared with $9,848,000 in fiscal year 1998. Revenue for the
year ended December 31,1999 reflect increased professional services for
(implementation and training) demand related to the general growth of the Facets
customer base.

    Other revenue for the fiscal year ended December 31, 1999 increased 25.5% to
$1,576,000 compared with $1,256,000 in fiscal year 1998. Revenue for the year
ended December 31, 1999 reflects increased third party hardware and software VAR
sales to Facets customers.

                                       24
<PAGE>
    COSTS OF REVENUE.  Costs of revenue for the twelve months of 1999 were
$29,068,000 compared with $25,760,000 in fiscal year 1998, an increase of 12.8%.
The increase is primarily due to expanded support resources related to the
growing Facets customer base.

    GROSS MARGIN.  Gross Margin for the twelve months of 1999 was 41.0% compared
with 33.0% for fiscal year 1998. The increase in Gross Margin is related to the
increase in software licensing revenue.

    RESEARCH AND DEVELOPMENT EXPENSES.  Research and Development expenditures
for the twelve months of 1999 were $2,496,000 compared with $1,514,000 in fiscal
year 1998, an increase of 64.9%. The increase is primarily due to added
resources related to Facets development.

    SELLING, GENERAL AND ADMINISTRATIVE EXPENSES.  Selling, general and
administrative costs for the twelve months of 1999 were $7,481,000 compared with
$6,567,000 in fiscal year 1998, an increase of 13.9%. This increase relates to
the expansion of the Marketing and Sales organization, as well as increased
advertising and promotion expenditures related to Facets.

    DEPRECIATION AND AMORTIZATION.  Depreciation and amortization increased to
$1,239,000 in the twelve months ended December 31, 1999 compared with $912,000
in the comparable period of 1998, an increase of 35.9%. This increase was due
primarily to capital expenditures for computer equipment and facilities
expansion in the New Jersey office.

    OPERATING INCOME.  Operating income for the twelve months of 1999 was
$9,023,000 compared with $3,674,000 in 1998, an increase of 145.6%. This
increase was due primarily to the increases in revenue and offset by the higher
operating costs, all as noted above.

    RELATED PARTY INTEREST EXPENSE.  Related party interest expense for the
fiscal year ended December 31, 1999 was $2,875,000 compared with $2,761,000 for
the same period in 1998, an increase of 4.1%. This amount consists mainly of
interest expense under Erisco's note payable to Spartan Leasing Corporation.

    OTHER INCOME (EXPENSE).  Other income for the fiscal year ended
December 31, 1999 was $125,000 compared with other expense of $64,000 for the
same period in 1998, a change of $189,000. This change is primarily a result of
accrued interest on a note receivable.

    INCOME TAX PROVISION.  Erisco's tax provision, calculated on a
separate-company basis, was $2,704,000 for the twelve months of 1999, compared
with $389,000 for the comparable period of 1998, an increase of 595.1%. The
effective tax rate of 43.1% is higher than the U.S. federal statutory tax rate,
principally due to the state and local income taxes.

    NET INCOME.  The net income for the twelve months of 1999 was $3,569,000,
compared with net income of $460,000 in 1998, due primarily to the after-tax
impact of the operating income discussed above.

YEAR ENDED DECEMBER 31, 1998 COMPARED WITH YEAR ENDED DECEMBER 31, 1997

    REVENUES.  Software license revenue for the fiscal year ended December 31,
1998 increased 3.5% to $12,539,000 compared with $12,116,000 in fiscal year
1997. Revenue for the year ended December 31, 1998 reflects customer growth
within the Facets product line.

    Software maintenance revenue for the fiscal year ended December 31, 1998
increased 14.6% to $14,784,000 compared with $12,895,000 in fiscal year 1997.
Revenue for year ended December 31,1998 reflects the addition of new sales in
1997 and 1998 going onto maintenance in the Facets customer base over the prior
year.

                                       25
<PAGE>
    Services revenue for the fiscal year ended December 31, 1998 increased 30.8%
to $9,848,000 compared with $7,528,000 in fiscal year 1997. Revenue for the year
ended December 31,1998 reflect increased professional services demand related to
the general growth of the Facets customer base.

    Other revenue for the fiscal year ended December 31, 1998 decreased 18.0% to
$1,256,000 compared with $1,532,000 in fiscal year 1997. Revenue for the year
ended December 31, 1998 reflects lower demand for hardware and software VAR
sales to Facets customers.

    COSTS OF REVENUE.  Costs of revenue for the twelve months of 1998 were
$25,760,000 compared with $21,514,000 in fiscal year 1997, an increase of 19.7%.
The increase is primarily due to expanded support resource expenses related to
the growing Facets customer base.

    GROSS MARGIN.  Gross Margin for the twelve months of 1998 was 33.0% compared
with 36.9% for fiscal year 1997. The decrease in Gross Margin was related to a
slower growth in software license revenue.

    RESEARCH AND DEVELOPMENT EXPENSES.  Research and Development expenditures
for the twelve months of 1998 were $1,514,000 compared with $888,000 in fiscal
year 1997, an increase of 70.5%. The increase is due to added resources related
to Facets development.

    SELLING, GENERAL AND ADMINISTRATIVE EXPENSES.  Selling, general and
administrative costs for the twelve months of 1998 were $6,567,000 compared with
$5,267,000 in fiscal year 1997, an increase of 24.7%. This increase relates to
an expanded marketing promotion campaign for Facets and increase in resources to
the organization.

    DEPRECIATION AND AMORTIZATION.  Depreciation and amortization increased to
$912,000 in the twelve months ended December 31, 1998 compared with $769,000 in
the comparable period of 1997, an increase of 18.6%. This increase was due
primarily to capital expenditures for computer equipment.

    OPERATING INCOME.  Operating income for the twelve months of 1998 was
$3,674,000 compared with $5,633,000 in 1997, a decrease of 34.8%. This increase
was due primarily to the higher operating costs, offset by the increase in
revenue, as noted above.

    RELATED PARTY INTEREST EXPENSE.  Related party interest expense for the
fiscal year ended December 31, 1998 was $2,761,000 compared with $2,044,000 for
the same period in 1997, an increase of 35.1%. This amount consists mainly of
interest expense under the Company's note payable to Spartan Leasing
Corporation.

    OTHER INCOME (EXPENSE).  Other expense for the fiscal year ended
December 31, 1998 was $64,000 compared to $51,000 for the same period in 1997.
This amount reflects a minor change in implied interest on a note payable.

    INCOME TAX PROVISION.  Erisco's tax provision, calculated on a
separate-company basis, was $389,000 for the twelve months of 1998, compared
with $1,507,000 for the comparable period of 1997. The effective tax rate of
45.8% is higher than the U.S. federal statutory tax rate, principally due to the
state and local income taxes.

    NET INCOME.  The net income for the twelve months of 1998 was $460,000,
compared with net income of $2,031,000 in 1997, a decrease of 77% due primarily
to the after-tax impact of the operating income discussed above.

LIQUIDITY AND CAPITAL RESOURCES

    Erisco has been operating as an entity wholly owned by IMS HEALTH and, as
such, has been dependent on IMS HEALTH for cash management, credit and financial
resources on an as needed

                                       26
<PAGE>
basis to fund operations and to fund seasonal cash needs. In the opinion of
management, Erisco's existing cash balances combined with cash generated from
operations are expected to be sufficient to meet Erisco's short-term annual
financing requirements.

    IMS HEALTH uses a centralized cash management system to finance its
operations. Cash deposits from Erisco are transferred to IMS HEALTH on a daily
basis, while IMS HEALTH funds Erisco's disbursement bank accounts as required.
No interest has been charged on these transactions. As a result, Erisco's cash
and cash equivalents in the accompanying financial statements are $0.

    Net cash provided by operating activities totaled $7,987,000 for the six
months ended June 30, 2000. This compares with $7,109,000 for the comparable
period in 1999. The increase in the six-month period ended June 30, 2000 is due
to improved accounts receivable collections.

    Net cash used in investing activities totaled $1,537,000 for the six months
ended June 30, 2000. This compares with cash used of $4,470,000 for the
comparable period in 1999. The decrease in cash usage was primarily due to
significant capital improvements to office facilities made in 1999.

    Net cash used in financing activities totaled $6,450,000 for the six months
ended June 30, 2000. This compares with cash used of $2,639,000 for the
comparable period in 1999. The increase in cash usage was primarily due to
increased net transfers to IMS HEALTH.

    Net cash provided by operating activities was $9,294,000 and $15,284,000 for
the years ended December 31, 1999 and 1998, respectively. The decrease of
$5,990,000 in 1999 was due to very high accounts receivable collections in 1998.

    Net cash used in investing activities was $6,870,000 and $4,006,000 for the
years ended December 31, 1999 and 1998, respectively. The increases are the
result of capital improvements to office facilities and expenditures for
computer equipment.

    Net cash used in financing activities was $2,424,000 and $11,278,000 for the
years ended December 31, 1999 and 1998, respectively. The variances are mainly
the result of changes in net transfers from IMS HEALTH.

RECENT ACCOUNTING PRONOUNCEMENTS

    In March 2000, the Financial Accounting Standards Board issued
Interpretation No. 44 "Accounting for Certain Transactions Involving Stock
Compensation, an interpretation of APB Opinion No. 25" ("FIN No. 44"). The
interpretation provides guidance for certain issues relating to stock
compensation, involving employees that arose in applying Opinion 25. The
provisions of FIN No. 44 are effective July 1, 2000. Adoption of FIN No. 44 will
have no impact on the Company's financial statements.

    In December 1999, the Securities and Exchange Commission ("SEC") issued
Staff Accounting Bulletin No. 101 Revenue Recognition in Financial Statements
("SAB No. 101"). SAB No. 101 summarizes certain of the SEC staff's views in
applying generally accepted accounting principles to revenue recognition in
financial statements. The Company believes its revenue recognition policies are
in compliance with the SEC staff's views.

                         CAUTIONARY STATEMENT REGARDING
                           FORWARD-LOOKING STATEMENTS

    This proxy statement contains certain "forward-looking statements" within
the meaning of the Private Securities Litigation Reform Act of 1995 with respect
to the financial condition, results of operations and business of TriZetto. You
can find many of these statements by looking for words such as "believes,"
"expects," "anticipates," "estimates" or similar expressions in this proxy
statement.

                                       27
<PAGE>
    These forward-looking statements are subject to numerous assumptions, risks
and uncertainties, and the Private Securities Litigation Reform Act provides a
"safe harbor" for these statements. These assumptions, risks and uncertainties
include, among others, the following:

    - TriZetto may not achieve the benefits it expects from the merger which may
      have a material adverse effect on TriZetto's business, financial condition
      and operating results and/or could result in loss of key personnel.

    - The merger could adversely affect TriZetto's financial results.

    - The market price of TriZetto's common stock may decline as a result of the
      merger.

    - Failure to complete the merger could negatively impact TriZetto's stock
      price, future business and operations.

    - TriZetto depends on the efficient operation of the Internet, other
      networks and systems of third parties; if they do not operate efficiently,
      TriZetto will not be able to effectively provide its products and
      services.

    - Security breaches could damage TriZetto's reputation and business.

    - TriZetto could be subject to potential liability claims related to use of
      its products and services.

    - The stock price of TriZetto may be extremely volatile.

    - Failure to attract and retain experienced personnel and senior management
      could harm TriZetto's ability to grow.

    - TriZetto's limited ability to protect its proprietary technology may
      adversely affect its ability to compete, and TriZetto may be found to
      infringe upon the proprietary rights of others, which could harm its
      business.

    - Future issuances of TriZetto shares could affect TriZetto's stock price.

    - Competitive pressures in the healthcare sectors served by TriZetto may
      increase significantly.

    - Unanticipated changes in operating expenses and capital expenditures may
      negatively affect operations.

    - Changing customer business conditions may negatively affect operations.

    - Financial or regulatory accounting principles or policies imposed by the
      Financial Accounting Standards Board, the SEC and similar agencies with
      regulatory oversight may negatively impact future results of operations.

    - Developments in third party technology could result in competitive
      disadvantages and potentially impair TriZetto's existing assets, products
      and services.

    - General economic or business conditions including inflation and capital
      market conditions, both domestic and foreign, may be less favorable than
      expected, resulting in, among other things, lower than expected revenues.

    - Legislative or regulatory changes may adversely affect the business in
      which TriZetto is engaged, including, without limitation, laws regulating
      the confidentiality of patient records, the healthcare industry and the
      Internet.

    - Adverse changes may occur in the securities markets.

    - Other risk factors as may be detailed from time to time in TriZetto's
      public announcements and filings with the SEC.

                                       28
<PAGE>
    - The decision by Sybase to stop offering its relational database system,
      which is used by Erisco's Facets product, may cause TriZetto to incur
      significant expenses to develop an alternative relational database system.

    Because such statements are subject to risks and uncertainties, actual
results may differ materially from those expressed or implied by such
forward-looking statements. Stockholders are cautioned not to place undue
reliance on such statements, which speak only as of the date of this proxy
statement.

    All subsequent written and oral forward-looking statements attributable to
TriZetto or any person acting on its behalf are expressly qualified in their
entirety by the cautionary statements contained or referred to in this section.
TriZetto does not undertake any obligation to release publicly any revisions to
such forward-looking statements to reflect events or circumstances after the
date of this proxy statement or to reflect the occurrence of unanticipated
events.

                                       29
<PAGE>
          UNAUDITED PRO FORMA COMBINED CONDENSED FINANCIAL INFORMATION

    The following unaudited pro forma condensed combined financial information
is based on the historical financial statements of TriZetto and Erisco and has
been prepared to illustrate the effect of the merger.

    The unaudited pro forma condensed combined balance sheet is as of June 30,
2000 and is presented as if the merger occurred as of June 30, 2000. The
unaudited pro forma condensed combined statements of income for the year ended
December 31, 1999 and for the six-month period ended June 30, 2000 assume that
the merger occurred as of January 1, 1999.

    The unaudited pro forma condensed combined financial information should be
read in conjunction with the historical financial statements and accompanying
disclosures contained in this proxy statement.

    The merger will be accounted for under the purchase method of accounting in
accordance with Financial Accounting Standards Board Opinion No. 16. Under the
purchase method of accounting, assets acquired and liabilities assumed are
recorded at their estimated fair values. Goodwill is created to the extent that
the merger consideration, including certain acquisition and closing costs,
exceeds the fair value of net assets acquired. Based on the information
currently available, the merger is expected to initially create approximately
$143.0 million in goodwill and other intangibles. It is estimated that this
goodwill and other intangibles will be amortized on a straight-line basis over
3-5 years. The actual goodwill arising from the merger will be based on the
merger consideration, including certain acquisition and closing costs, and fair
values of assets and liabilities on the date the merger is consummated. No
assurance can be given that the actual goodwill amount arising from the merger
or the goodwill amortization period will not be more or less than the amount or
period currently contemplated in the unaudited pro forma condensed combined
financial information.

    TriZetto expects that it will incur costs in connection with the merger
which will be capitalized. Certain post-combination integration expenses
resulting from combining the companies, which will be expensed, are not
reflected in the unaudited pro forma condensed combined financial information.
Additionally, the unaudited pro forma condensed combined financial information
is based on a number of assumptions, estimates and uncertainties including, but
not limited to, estimates of the fair values of assets acquired and liabilities
assumed and estimated acquisition and closing costs.

    The unaudited pro forma condensed combined financial information presented
below does not reflect future events that may occur after the merger. TriZetto
believes that operating expense synergies between TriZetto and Erisco will be
realized after the merger. However, for purposes of the unaudited pro forma
condensed combined financial information presented below, these synergies have
not been reflected because TriZetto cannot assure you that they will be
realized.

    The unaudited pro forma condensed combined financial information assumes the
issuance of approximately 12,142,857 shares of TriZetto's common stock to effect
the merger. However, the actual number of shares issued may be more or less than
this amount depending upon, among other things, the average closing price of
TriZetto's common stock for the 15 trading days ending on the third trading day
prior to the closing date of the merger.

    As a result of these assumptions, estimates and uncertainties, the
accompanying unaudited pro forma condensed combined financial information does
not purport to describe the actual financial condition or results of operations
that would have been achieved had the merger in fact occurred on the dates
indicated, nor does it purport to predict TriZetto's future financial condition
or results of operations.

                                       30
<PAGE>
                     UNAUDITED PRO FORMA COMBINED CONDENSED

                           CONSOLIDATED BALANCE SHEET

                              AS OF JUNE 30, 2000

                                 (IN THOUSANDS)

<TABLE>
<CAPTION>
                                                                  HISTORICAL
                                                              -------------------                 PRO FORMA
                                                              TRIZETTO    ERISCO    ADJUSTMENTS     TOTAL
                                                              --------   --------   -----------   ----------
<S>                                                           <C>        <C>        <C>           <C>
ASSETS

Current assets
  Cash and cash equivalents.................................  $  8,433   $     --    $ 32,000(A)   $ 40,433
  Accounts receivable, net..................................     9,269      2,518                    11,787
  Prepaid expenses and other current assets.................     2,716      1,611                     4,327
  Due from IMS HEALTH.......................................        --     34,921     (34,921)(A)        --
                                                              --------   --------    --------      --------
    Total current assets....................................    20,418     39,050      (2,921)       56,547
Property and equipment, net.................................    11,707      4,470                    16,177
Computer Software...........................................                7,029      (7,029)(B)        --
Long-term investments.......................................     3,434         --                     3,434
Other assets................................................     1,854         --                     1,854
Goodwill and other intangible assets, net...................    21,426         --     143,045(C)    164,471
                                                              --------   --------    --------      --------
    Total assets............................................  $ 58,839   $ 50,549    $133,095      $242,483
                                                              ========   ========    ========      ========
LIABILITIES AND STOCKHOLDERS' EQUITY

Current liabilities
  Accounts payable..........................................  $  2,289   $    272                  $  2,561
  Accrued expenses..........................................     9,062      4,706       9,500(D)     23,268
  Short term obligations....................................     4,487         --                     4,487
  Taxes payable.............................................        10         --                        10
  Deferred revenue..........................................       177     14,821     (10,375)(E)     4,623
                                                              --------   --------    --------      --------
    Total current liabilities...............................    16,025     19,799        (875)       34,949
Long term obligations.......................................     2,859        886                     3,745
Deferred income taxes.......................................        --      2,217                     2,217
Deferred revenue............................................       113         --                       113
                                                              --------   --------    --------      --------
    Total liabilities.......................................    18,997     22,902        (875)       41,024
                                                              --------   --------    --------      --------
Stockholders' equity
  Common stock..............................................        21         --          12(G)         33
  Paid-in capital...........................................    70,400     57,061     107,614(F,G)   235,075
  Deferred stock compensation...............................    (4,894)        --                    (4,894)
  Accumulated deficit.......................................   (25,642)   (29,414)     26,344(F,H)   (28,712)
  Other stockholders' equity................................       (43)        --                       (43)
                                                              --------   --------    --------      --------
    Total stockholders' equity..............................    39,842     27,647     133,970       201,459
                                                              --------   --------    --------      --------
    Total liabilities and stockholders' equity..............  $ 58,839   $ 50,549    $133,095      $242,483
                                                              ========   ========    ========      ========
</TABLE>

  The accompanying notes are an integral part of these consolidated financial
                                  statements.

                                       31
<PAGE>
                     UNAUDITED PRO FORMA COMBINED CONDENSED

                      CONSOLIDATED STATEMENT OF OPERATIONS

                     TWELVE MONTHS ENDED DECEMBER 31, 1999

                                 (IN THOUSANDS)

<TABLE>
<CAPTION>
                                                                  HISTORICAL
                                                              -------------------                 PRO FORMA
                                                              TRIZETTO    ERISCO    ADJUSTMENTS     TOTAL
                                                              --------   --------   -----------   ----------
<S>                                                           <C>        <C>        <C>           <C>
Revenues:
  Recurring revenue.........................................  $19,448    $    --                   $ 19,448
  Non-recurring revenue.....................................   13,478         --                     13,478
  Software license, maintence services and other revenue....       --     49,307                     49,307
                                                              -------    -------                   --------
Total revenues..............................................   32,926     49,307                     82,233
                                                              -------    -------                   --------
Cost of Revenues:
  Recurring revenue.........................................   17,057         --                     17,057
  Non-recurring revenue.....................................    9,751         --                      9,751
  Software revenue..........................................       --     29,068                     29,068
                                                              -------    -------                   --------
Total cost of revenues......................................   26,808     29,068                     55,876
                                                              -------    -------                   --------
Gross profit................................................    6,118     20,239                     26,357
                                                              -------    -------                   --------
Operating expenses:
  Research and development..................................    2,371      2,496                      4,867
  Selling, general and administrative.......................    9,694      8,720       32,985(I)     51,399
  Amortization of deferred stock compensation...............    1,057         --                      1,057
  Write off of acquired in-process technology...............    1,407         --        3,070(H)      4,477
                                                              -------    -------     --------      --------
Total operating expenses....................................   14,529     11,216       36,055        61,800
                                                              -------    -------     --------      --------
Income (loss) from operations...............................   (8,411)     9,023      (36,055)      (35,443)

Interest income.............................................      527                                   527
Interest expense............................................     (256)                                 (256)
Other expense...............................................       --     (2,750)                    (2,750)
                                                              -------    -------     --------      --------
Income (loss) before provision for (benefit of)
  Income taxes..............................................   (8,140)     6,273      (36,055)      (37,922)
Provision for (benefit of) income taxes.....................     (213)     2,704                      2,491
                                                              -------    -------     --------      --------
Net income (loss)...........................................  $(7,927)   $ 3,569     $(36,055)     $(40,413)
                                                              =======    =======     ========      ========
Net loss per share
Basic.......................................................  $ (0.85)                             $  (1.88)
                                                              =======                              ========
Diluted.....................................................  $ (0.85)                             $  (1.88)
                                                              =======                              ========
Shares used in computing net loss per share:
Basic.......................................................    9,376                                21,519
                                                              =======                              ========
Diluted.....................................................    9,376                                21,519
                                                              =======                              ========
</TABLE>

  The accompanying notes are an integral part of these consolidated financial
                                  statements.

                                       32
<PAGE>
                     UNAUDITED PRO FORMA COMBINED CONDENSED

                      CONSOLIDATED STATEMENT OF OPERATIONS

                         SIX MONTHS ENDED JUNE 30, 2000

                                 (IN THOUSANDS)

<TABLE>
<CAPTION>
                                                                  HISTORICAL
                                                              -------------------                 PRO FORMA
                                                              TRIZETTO    ERISCO    ADJUSTMENTS     TOTAL
                                                              --------   --------   -----------   ----------
<S>                                                           <C>        <C>        <C>           <C>
Revenues:
  Recurring revenue.........................................  $ 24,344   $    --                   $ 24,344
  Non-recurring revenue.....................................    11,132        --                     11,132
  Software license, maintenance, service and other
    revenue.................................................        --    24,502                     24,502
                                                              --------   -------                   --------
Total revenues..............................................    35,476    24,502                     59,978
                                                              --------   -------                   --------
Cost of Revenues:
  Recurring revenue.........................................    22,656        --                     22,656
  Non-recurring revenue.....................................     7,756        --                      7,756
  Software revenue..........................................        --    14,978                     14,978
                                                              --------   -------                   --------
Total cost of revenues......................................    30,412    14,978                     45,390
                                                              --------   -------                   --------
Gross profit................................................     5,064     9,524                     14,588
                                                              --------   -------                   --------
Operating expenses:
  Research and development..................................     3,197     1,923                      5,120
  Selling, general and administrative.......................    17,395     5,654       16,493(I)     39,542
  Amortization of deferred stock compensation...............       892        --                        892
  Write off of acquired in-process technology...............       536        --                        536
                                                              --------   -------     --------      --------
Total operating expenses....................................    22,020     7,577       16,493        46,090
                                                              --------   -------     --------      --------
Income (loss) from operations...............................   (16,956)    1,947      (16,493)      (31,502)
Interest income.............................................       609                                  609
Interest expense............................................      (183)                                (183)
Other expense...............................................        --    (1,712)            (J)     (1,712)
                                                              --------   -------     --------      --------
Income (loss) before provision for (benefit of)
  Income taxes..............................................   (16,530)      235      (16,493)      (32,788)
Provision for income taxes..................................        --        99                         99
                                                              --------   -------     --------      --------
Net income (loss)...........................................  $(16,530)  $   136     $(16,493)     $(32,887)
                                                              ========   =======     ========      ========
Net loss per share
Basic.......................................................  $  (0.85)                            $  (1.04)
                                                              ========                             ========
Diluted.....................................................  $  (0.85)                            $  (1.04)
                                                              ========                             ========
Shares used in computing net loss per share:
Basic.......................................................    19,557                               31,700
                                                              ========                             ========
Diluted.....................................................    19,557                               31,700
                                                              ========                             ========
</TABLE>

  The accompanying notes are an integral part of these consolidated financial
                                  statements.

                                       33
<PAGE>
                NOTES TO UNAUDITED PRO FORMA COMBINED CONDENSED

                       CONSOLIDATED FINANCIAL INFORMATION

                                 (IN THOUSANDS)

NOTE 1.  SUMMARY OF TRANSACTION

    In connection with TriZetto's acquisition of Erisco, TriZetto will exchange
12,143 shares of common stock, and assumed liabilities of approximately $8.1
million for all of the outstanding shares of Erisco and incurred or are
expecting to incur acquisition related costs of approximately $9.5 million.

    The allocation of the purchase price was as follows:

    Allocation of purchase price:

<TABLE>
<S>                                                           <C>
Total current assets........................................  $ 36,129
Property and equipment and other noncurrent assets..........     4,470
Goodwill(a).................................................    94,495
Acquired workforce(b).......................................     5,960
Core technology(c)..........................................    26,860
Trade Name(d)...............................................     3,100
Customer lists(e)...........................................    12,630
Acquired in-process technology(f)...........................     3,070
                                                              --------
                                                              $186,714
                                                              ========
</TABLE>

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

    (a) Goodwill represents the excess of the purchase price over the fair value
       of the net assets acquired and will be amortized over five years.

    (b) Acquired workforce was valued on a replacement cost basis and will be
       amortized on a straight line basis over a three-year period, the period
       of time TriZetto estimates it will benefit from the workforce.

    (c) Core technology is being amortized on a straightline basis over three
       years.

    (d) The intangible asset related to Erisco's trade name and is being
       amortized on a straight line basis over five years.

    (e) Customer lists are being amortized on a straightline basis over five
       years.

    (f) The valuation of the purchased in-process research development of $3,070
       was based on the result of an independent appraisal using the income
       approach. Under this method, value is dependent on the present value of
       future economic benefits to be derived from the ownership of an asset.
       Central to this method is an analysis of the earnings potential
       represented by the appraised asset and of the underlying risks associated
       by obtaining those earnings. Value indications are developed by
       discounting future net cash flows available for distribution to their
       present value at market-based rates of return.

NOTE 2.  UNAUDITED PRO FORMA COMBINED NET INCOME (LOSS) PER SHARE:

   Basic net income (loss) per share and shares used in computing the net income
(loss) per share for the year ended December 31, 1999 and the six months ended
June 30, 2000 are based upon the historical weighted average common shares
outstanding. Dilutive net income (loss) per share reflects the potenial dilution
that could occur from common shares issuable through stock options, warrants and
other convertible securities. Potential common stock has been excluded from the
computation of net loss per share as its effect would be anti-dilutive.

    The 12,143 shares of common stock issued in connection with the acquisition
has been included in the calculation of pro forma basic and diluted net loss per
share as follows:

<TABLE>
<CAPTION>
                                                                  YEAR ENDED            SIX MONTHS
                                                                 DECEMBER 31,              ENDED
                                                                     1999              JUNE 30, 2000
                                                              -------------------   -------------------
                                                               BASIC     DILUTED     BASIC     DILUTED
                                                              --------   --------   --------   --------
<S>                                                           <C>        <C>        <C>        <C>
Shares used in computing basic and diluted net loss per
  share.....................................................    9,376      9,376     19,557     19,557
Adjustment to reflect common stock issued in acquisition....   12,143     12,143     12,143     12,143
                                                               ------     ------     ------     ------
Shares used in computing pro forma basic and diluted net
  loss per share attributable to common stockholders........   21,519     21,519     31,700     31,700
                                                               ======     ======     ======     ======
</TABLE>

                                       34
<PAGE>
                NOTES TO UNAUDITED PRO FORMA COMBINED CONDENSED

                       CONSOLIDATED FINANCIAL INFORMATION

                                 (IN THOUSANDS)

NOTE 3.  PRO FORMA ADJUSTMENTS:

   The following pro forma adjustments are based upon management's preliminary
estimates of the value of the tangible and intangible assets acquired. These
estimates are subject to finalization.

    (A) Represents the guaranteed cash that TriZetto will receive from Erisco's
parent company upon the closing of the Erisco merger as stated in the Agreement
and Plan of Reorganization, this amount is reclassified from the "due from IMS
HEALTH" line on the balance sheet. The remaining intercompany receivable will
not be assumed by TriZetto.

    (B) Computer Software has been revalued by an independent appraisal and
reclassified as part of intangible assets--"Completed technology".

    (C) Represents $143,045 of goodwill and other intangible assets, summarized
as follows:

<TABLE>
<S>                                                           <C>
Goodwill....................................................  $ 94,495
Completed technology........................................    26,860
Trade name..................................................     3,100
Acquired workforce..........................................     5,960
Customer lists..............................................    12,630
                                                              --------
                                                              $143,045
                                                              ========
</TABLE>

    (D) Represents accrued transaction costs associated with the acquisition.

    (E) Represents Erisco's deferred revenue for which no future deliverable or
liability exists.

    (F) Represents the elimination of $57,061 from Erisco's paid-in-capital
account and $29,414 from its accumulated deficit account.

    (G) Represents the common stock issued in connection with the acquisition
(12,143 shares of $0.001 par value common stock at an estimated price of $13.56,
resulting in $12 of par value and $164,675 of paid-in-capital).

    (H) Represents $3,070 of acquired in-process technology. Management
concluded that technological feasibility of the acquired in-process technologies
was not established and that the acquired in-process technology had no
alternative future use. Such amounts are reflected as a charge to accumulated
deficit in the unaudited proforma balance sheet at June 30, 2000. Such
in-process technology was valued in the manner stated in Note 1(f) and is
expensed in accordance with Financial Accounting Standard No. 2 "Accounting for
Research and Development Costs".

    (I) Represents amortization of goodwill and other intangible assets over
three to five years.

    (J) Other expenses for the six months ended June 30, 2000 and the year ended
December 31, 1999 included $1,712 and $2,875 of related party interest expense,
respectively. Such expense will not recur.

                                       35
<PAGE>
                          THE TRIZETTO SPECIAL MEETING

DATE, TIME AND PLACE OF SPECIAL MEETING

    This proxy statement is being mailed to the holders of TriZetto common stock
for use at the TriZetto special meeting to be held on         , 2000 at
10:00 a.m., Pacific time, at the Marriott Newport Beach Hotel, 900 Newport
Center Drive, Newport Beach, California 92660, and at any adjournments or
postponements thereof.

MATTERS TO BE CONSIDERED AT SPECIAL MEETING

    At the TriZetto special meeting, TriZetto stockholders will be asked to
consider and vote upon proposals to approve the issuance of shares of TriZetto
common stock to IMS HEALTH, as the sole stockholder of Erisco, in connection
with the merger of a wholly owned subsidiary of TriZetto with and into Erisco,
resulting in Erisco becoming a wholly owned subsidiary of TriZetto, and to
approve an amendment to TriZetto's Amended and Restated Certificate of
Incorporation to increase the authorized number of shares of TriZetto capital
stock from 45,000,000 to 100,000,000 consisting of 5,000,000 shares of
undesignated preferred stock and 95,000,000 shares of undesignated series common
stock.

PROXIES

    As a TriZetto stockholder, you are encouraged to use the accompanying proxy
if you are unable to attend the TriZetto special meeting in person or wish to
have your shares voted by proxy even if you do attend the TriZetto special
meeting. All proxies that are properly executed and returned, and that are not
revoked, will be voted in the manner specified therein. Proxies received that do
not contain voting instructions will be voted "FOR" approval of the issuance of
shares of TriZetto common stock in the merger and "FOR" the amendment to the
Amended and Restated Certificate of Incorporation of TriZetto. TriZetto's board
of directors does not presently intend to bring any business before the special
meeting other than the specific proposals referred to in this proxy statement
and the Notice of Special Meeting. TriZetto's board of directors is unaware of
any other matters to be brought before the special meeting. As to any business
that may properly come before the special meeting, however, it is intended that
proxies will be voted in respect thereof in accordance with the judgment of the
persons voting such shares.

REVOCATION OF PROXIES

    A TriZetto stockholder who signs and mails the enclosed proxy may revoke it
at any time before it is voted by giving written notice of revocation to
TriZetto, by mailing a later dated proxy which is received by TriZetto prior to
the TriZetto special meeting, or by voting in person at the TriZetto special
meeting. All written notices of revocation and other communications with respect
to revocation of TriZetto proxies should be addressed to The TriZetto
Group, Inc., 567 San Nicolas Drive, Suite 360, Newport Beach, California 92660,
Attention: Secretary. If you have instructed your broker to vote your shares,
you must follow the directions received from your broker to change your vote.

RECORD DATE

    Only holders of record of shares of TriZetto common stock at the close of
business on August 31, 2000 are entitled to notice of and to vote at the
TriZetto special meeting, with each share entitled to one vote.

                                       36
<PAGE>
NO APPRAISAL RIGHTS

    TriZetto stockholders have no appraisal rights in connection with the
issuance of shares in connection with the merger.

VOTE REQUIRED

    Approval of the issuance of shares of TriZetto common stock in the merger
requires the favorable vote of the holders of at least a majority of the shares
present and entitled to vote at the special meeting. Approval of the amendment
to TriZetto's Amended and Restated Certificate of Incorporation that increases
the authorized number of shares of TriZetto capital stock requires the favorable
vote of the holders of at least a majority of the shares of TriZetto common
stock outstanding as of the record date. Abstentions will be treated as shares
present and entitled to vote for purposes of any matter requiring the
affirmative vote of a majority or other proportion of the shares present and
entitled to vote. Shares relating to any proxy as to which a broker non-vote is
indicated on a proposal will not be considered present and entitled to vote with
respect to any such proposal. An abstention or a broker non-vote with respect to
the proposal to amend TriZetto's Amended and Restated Certificate of
Incorporation will have the effect of a vote against that proposal. With respect
to the proposal for the issuance of shares of TriZetto common stock, an
abstention will have the same effect as a "NO" vote and a broker non-vote will
have no effect. TRIZETTO'S BOARD OF DIRECTORS URGES THE TRIZETTO STOCKHOLDERS TO
COMPLETE, DATE AND SIGN THE ACCOMPANYING PROXY AND RETURN IT PROMPTLY IN THE
ENCLOSED, POSTAGE-PAID ENVELOPE.

    In order to induce IMS HEALTH to enter into the transaction, certain
stockholders of TriZetto have entered into voting agreements with IMS HEALTH
obligating them to vote their shares, and any additional shares they acquire, in
favor of the issuance of shares to IMS HEALTH in connection with the merger and
against any action that would interfere with the merger or the issuance of the
shares in connection with merger. As of the record date, such stockholders as a
group beneficially owned 10,909,694 shares (exclusive of any shares issuable
upon the exercise of options) of TriZetto common stock, representing
approximately 51% of the shares of TriZetto common stock outstanding as of the
record date.

QUORUM

    Holders of a majority of the outstanding shares of TriZetto common stock
entitled to vote must be present, either in person or by proxy, at the TriZetto
special meeting to constitute a quorum. In general, abstentions and broker
non-votes will be counted as present or represented for the purposes of
determining a quorum for the TriZetto special meeting. As discussed above,
holders of approximately 51% of the shares of TriZetto common stock outstanding
as of the record date have given IMS HEALTH irrevocable proxies to vote their
shares at the special meeting.

EXPENSES OF SOLICITATION

    It is contemplated that this solicitation of proxies will be made primarily
by mail; however, if it should appear desirable to do so in order to ensure
adequate representation at the meeting, TriZetto's directors, officers and
employees may communicate with stockholders, brokerage houses and others by
telephone, telegraph or in person to request that proxies be furnished. TriZetto
may reimburse banks, brokerage houses, custodians, nominees and fiduciaries for
their reasonable expenses in forwarding proxy materials to the beneficial owners
of the shares held by them. All expenses incurred in connection with this
solicitation shall be borne by TriZetto.

                                       37
<PAGE>
RECOMMENDATION OF TRIZETTO'S BOARD OF DIRECTORS

    TRIZETTO'S BOARD OF DIRECTORS HAS UNANIMOUSLY APPROVED THE MERGER AGREEMENT
AND THE MERGER, DECLARED THAT THE MERGER AGREEMENT AND THE MERGER ARE ADVISABLE
AND DETERMINED THAT THE MERGER IS FAIR TO, AND IN THE BEST INTERESTS OF,
TRIZETTO AND THE TRIZETTO STOCKHOLDERS. ACCORDINGLY, TRIZETTO'S BOARD OF
DIRECTORS UNANIMOUSLY RECOMMENDS THAT THE TRIZETTO STOCKHOLDERS VOTE "FOR"
APPROVAL OF THE ISSUANCE OF SHARES OF TRIZETTO COMMON STOCK PURSUANT TO THE
MERGER AND "FOR" APPROVAL OF THE AMENDMENT TO TRIZETTO'S AMENDED AND RESTATED
CERTIFICATE OF INCORPORATION THAT WILL INCREASE THE AUTHORIZED SHARES OF
TRIZETTO TO 100,000,000 SHARES, CONSISTING OF 5,000,000 SHARES OF UNDESIGNATED
PREFERRED STOCK AND 95,000,000 SHARES OF COMMON STOCK. See "The Merger--TriZetto
Reasons for the Merger; Recommendation of TriZetto's Board of Directors."

OTHER MATTERS

    It is not expected that any other matters will be brought before the
TriZetto special meeting. If any other matters are properly brought before the
TriZetto special meeting, including a motion to adjourn or postpone the TriZetto
special meeting to another time and/or place for the purpose of, among other
things, permitting dissemination of information regarding material developments
relating to the merger agreement and the merger, or soliciting additional
proxies in favor of the approval of the issuance of shares of TriZetto common
stock in connection with the merger, the persons named on the accompanying proxy
card will vote the shares represented by the proxy upon such matters in their
discretion. However, if TriZetto proposes to adjourn or postpone its special
meeting for the purpose of soliciting additional votes in favor of the issuance
of shares of TriZetto stock in connection with the merger, and seeks a vote of
TriZetto stockholders on such proposal, proxies that have been voted against the
issuance of shares (or on which a TriZetto stockholder has elected to abstain)
will not be voted in favor of any adjournment or postponement for the purpose of
soliciting additional proxies. Any other proxy will be deemed to have voted
"FOR" any such adjournment or postponement proposal. Should the TriZetto special
meeting be reconvened, all proxies will be voted in the same manner as such
proxies would have been voted when the TriZetto special meeting was originally
convened, except for proxies effectively revoked or withdrawn prior to the time
proxies are voted at the reconvened TriZetto special meeting.

STOCK CERTIFICATES

    TRIZETTO STOCKHOLDERS SHOULD NOT SEND IN ANY STOCK CERTIFICATES WITH THEIR
PROXY CARDS. TRIZETTO STOCKHOLDERS WILL NOT EXCHANGE THEIR STOCK CERTIFICATES IN
CONNECTION WITH THE MERGER.

                                       38
<PAGE>
                                   THE MERGER

    THE FOLLOWING DESCRIBES CERTAIN ASPECTS OF THE PROPOSED MERGER. THIS SUMMARY
MAY NOT CONTAIN ALL OF THE INFORMATION THAT IS IMPORTANT TO YOU. TO UNDERSTAND
THE MERGER FULLY, AND FOR A MORE COMPLETE DESCRIPTION OF THE LEGAL TERMS OF THE
MERGER, YOU ARE URGED TO READ THE MERGER AGREEMENT CAREFULLY. A COPY OF THE
MERGER AGREEMENT IS ATTACHED AS APPENDIX A TO THIS DOCUMENT AND IS INCORPORATED
IN THIS DOCUMENT BY REFERENCE.

BACKGROUND OF THE MERGER

    During the summer of 1999, TriZetto determined that obtaining the rights to
license Erisco's software with TriZetto's ASP offerings would be desirable in
order to most effectively penetrate the healthcare payor market. Throughout the
summer and fall of 1999, executive officers of both companies participated in
informal discussions regarding an ASP arrangement between the parties.

    In February 2000, Jeffrey A. Margolis, TriZetto's Chief Executive Officer,
and Tony Bellomo, Erisco's President, had several additional discussions
regarding TriZetto's desire to enter into an ASP agreement with Erisco.
Mr. Bellomo outlined his concerns regarding the effectiveness of an ASP
relationship, and Mr. Margolis and Mr. Bellomo initially discussed the
possibility of an equity transaction. On February 23, 2000, TriZetto and IMS
HEALTH signed a Mutual Non-Disclosure Agreement. Also on February 23, 2000,
Mr. Margolis, Mr. Bellomo, Victoria R. Fash, IMS HEALTH's President and Chief
Executive Officer, and Robert E. Weissman, IMS HEALTH's Chairman, met to discuss
TriZetto's and Erisco's strategic objectives. The parties also discussed
TriZetto's possible acquisition of Erisco. Mr. Margolis outlined his strategic
vision of a combination of TriZetto and Erisco, operating philosophies and
objectives and the potential strategic benefit of a combination.

    On March 2, 2000, senior executives of TriZetto, IMS HEALTH and Erisco as
well as TriZetto's legal advisors attended an organizational meeting in Newport
Beach, California to discuss due diligence, the potential terms of a deal and
the timing of a possible acquisition. These discussions continued for several
days. On March 2, 2000, TriZetto held a telephonic board meeting to discuss the
status of the potential acquisition of Erisco. On March 7, 2000, TriZetto's
legal counsel distributed a draft of a merger agreement contemplating the
acquisition of Erisco by TriZetto.

    From March 3, 2000 through March 9, 2000, senior executives of TriZetto, IMS
HEALTH and Erisco continued to discuss other possible strategic relationships
and potential synergies among the three companies. During this period, the
parties continued to negotiate TriZetto's acquisition of Erisco in person and
via telephonic meetings. Principal business terms were discussed at these
meetings, but no definitive agreements were made between the parties. On
March 9, 2000, senior executives of IMS HEALTH and TriZetto discussed
restructuring the proposed Erisco transaction into a full business combination
of TriZetto and IMS HEALTH. From March 12, 2000 through March 17, 2000, senior
executives of TriZetto, IMS HEALTH and Erisco met and discussed a variety of
business combination scenarios. At the conclusion of those meetings, it was
determined that a business combination would be structured under which IMS
HEALTH would merge into TriZetto, with the stockholders of IMS HEALTH owning
approximately 85% of the resulting entity.

    On March 19, 2000, TriZetto's executives flew to Westport, Connecticut to
continue negotiations, due diligence, and to prepare to announce the
transaction. The meetings between the parties occurred in Westport, Connecticut
and New York, New York through March 28, 2000. During that period, TriZetto
engaged UBS Warburg to provide financial advisory services to TriZetto in
connection with the IMS HEALTH merger, and TriZetto, IMS HEALTH and their legal
and financial advisors discussed transaction terms. These transaction terms
included valuation, management of the surviving corporation, name of the
surviving corporation, headquarters location and transaction structure, among
other things. The parties also discussed the merger agreement and other
documents evidencing the various agreements including voting agreements and
related documents.

                                       39
<PAGE>
    From March 25, 2000 to March 27, 2000, TriZetto's board held daily
telephonic board meetings, together with TriZetto's legal and financial
advisors, to discuss the progress of the negotiations of the definitive
agreement, the potential synergies between the companies, and other related
issues. On March 27, 2000, TriZetto's board held a meeting in New York, New York
regarding the transaction.

    During the evening of March 27, 2000 and continuing through the early
morning of March 28, 2000, the parties completed the negotiations of the merger
agreement.

    On March 27, 2000, separate meetings of the boards of directors of TriZetto
and IMS HEALTH were held at which the proposed merger transaction was approved.
The merger agreement and related agreements were executed and the transaction
was announced on March 28, 2000. From March 28, 2000 to April 3, 2000,
executives of TriZetto and IMS HEALTH met with investors, analysts and
stockholders to discuss the transaction.

    The proposed TriZetto-IMS HEALTH merger was subject to the approval of both
IMS HEALTH's and TriZetto's stockholders. On April 4, 2000, TriZetto executives
met to discuss the fact that the proposed transaction was not well received by
the investment community, the likelihood that IMS HEALTH's stockholders would
not approve the transaction, and strategic alternatives going forward. On
April 5, 2000 and April 10, 2000, TriZetto's board held telephonic board
meetings to discuss TriZetto's alternatives.

    On April 11, 2000, Mr. Margolis and Harvey Garte, TriZetto's Vice President
of Corporate Development, met with Ms. Fash and Mr. Weissman in Westport,
Connecticut to discuss alternative transactions, including the possibility of
TriZetto acquiring Erisco. On April 17, 2000, the parties suggested that in
light of the stockholder reaction to the proposed transaction an alternative
transaction should be pursued. On April 17, 2000, the TriZetto board met
telephonically and agreed to pursue the acquisition of Erisco if acceptable
terms could be agreed upon.

    On April 18, 2000, TriZetto and IMS HEALTH announced their joint decision to
evaluate potential alternatives to the proposed TriZetto-IMS HEALTH merger.

    From April 19, 2000 to May 15, 2000, TriZetto and IMS HEALTH negotiated the
terms of TriZetto's proposed acquisition of Erisco. During this period, the
parties drafted, reviewed and revised the terms of the merger agreement, voting
agreements, stockholder agreement and registration rights agreement.

    On April 27, 2000, the TriZetto board met telephonically to discuss the
progress of the negotiations, including acquisition price, deal structure and
the valuation of Erisco. On April 27, 2000, TriZetto executives discussed the
deal terms with TriZetto's legal and financial advisors and updated each other
as to the status of negotiations.

    On April 28, 2000, Mr. Margolis and Ms. Fash continued to discuss the terms
of the alternative transaction. From April 28, 2000 through May 7, 2000, the
parties continued to revise the merger documents, discuss open items and
complete due diligence efforts.

    On May 7, 2000, TriZetto discussed the open deal points with its legal and
financial advisors. On May 7, 2000, Mr. Margolis, Mr. Garte and Christine
Miller, TriZetto's Vice President of Legal Affairs, discussed unresolved issues
with Ms. Fash, including acquisition price, valuation and the necessity to enter
into an alternative arrangement. Discussions among the parties took place
throughout the day of May 7, 2000.

    On May 10, 2000, TriZetto's board held a telephonic conference to discuss
valuation and other deal points. From May 10, 2000 through May 16, 2000,
TriZetto's and IMS HEALTH's management teams and legal and financial advisors
continued to negotiate the terms of the transaction and reviewed and revised the
proposed transaction documents. As part of the negotiations, IMS HEALTH insisted

                                       40
<PAGE>
that certain stockholders of TriZetto sign voting agreements in favor of the
proposed acquisition of Erisco.

    On May 11, 2000 and again on May 13, 2000, TriZetto's board held telephonic
meetings at which meetings, the board reviewed and discussed with TriZetto's
senior management and legal and financial advisors the proposed deal terms.

    On May 13, 2000, TriZetto and IMS HEALTH executives discussed the remaining
open deal terms and agreed to have further discussions on May 14, 2000. On
May 14, 2000, TriZetto and IMS HEALTH resolved additional open deal terms,
subject to review of definitive agreements.

    On May 14 and May 15, 2000, TriZetto's board held telephonic meetings that
also were attended by TriZetto's senior management and legal and financial
advisors. At these meetings, the board discussed the open issues relating to the
data rights agreement, consent rights of IMS HEALTH relating to the conduct of
TriZetto's business after consummation of the merger, and TriZetto's financial
projections.

    On May 16, 2000, the TriZetto board held another telephonic meeting that was
also attended by TriZetto's senior management and legal and financial advisors.
With the assistance of TriZetto's legal counsel, TriZetto's board reviewed the
final terms of the proposed merger. UBS Warburg then reviewed with the TriZetto
board its financial analysis of the merger consideration provided for in the
proposed transaction and rendered its oral opinion as to the fairness, from a
financial point of view, to TriZetto of the merger consideration. Based upon its
review, the TriZetto board unanimously approved and authorized the execution of
the merger agreement and ancillary documents.

    Later that day, TriZetto's and IMS HEALTH's executives approved and executed
the transaction documents. The parties announced the proposed merger on the
evening of May 16, 2000.

TRIZETTO'S REASONS FOR THE MERGER; RECOMMENDATION OF TRIZETTO'S BOARD OF
  DIRECTORS

    TriZetto believes that the software, financial resources and installed
customer base held by Erisco will provide TriZetto with a competitive advantage.
TriZetto also believes that the strategic acquisition of Erisco will
substantially mitigate many of the significant challenges that TriZetto will
continue to face as a provider of application services and business portals for
the healthcare industry. Some of TriZetto's competitors may have significantly
greater financial, technical, product development, marketing and other resources
than TriZetto. Competitors may also develop or acquire substantial installed
customer bases in the healthcare industry.

    In reaching its determination to recommend approval and adoption of the
merger agreement and the merger, the TriZetto board considered a number of
factors, including the following material factors:

    - the terms and conditions of the proposed merger Agreement, including the
      amount and form of consideration being paid by TriZetto to IMS HEALTH and
      the fact that the number of shares to be issued to IMS HEALTH is fixed if
      the average trading price of TriZetto falls below $21.00;

    - the increased ability of TriZetto to provide the widest selection of
      applications to TriZetto's customers on a pre-integrated basis;

    - the strategic alliance created between TriZetto and IMS HEALTH, including,
      without limitation, a license agreement with IMS HEALTH for TriZetto's
      HealthWeb Internet portal and TriZetto becoming the preferred application
      services provider and transformation services provider to IMS HEALTH for
      five years following the consummation of the merger;

    - the ability of TriZetto to extend its ASP offerings by offering Erisco
      software on an ASP basis;

    - Erisco's historical strong positive cash flow;

                                       41
<PAGE>
    - Erisco's access to technology solutions that currently support
      approximately 70 million managed care lives worldwide;

    - information relating to the business, assets, management, competitive
      position, operating performance and prospects of each of TriZetto and
      Erisco, including their competitive positions if they were to continue as
      independent companies;

    - current industry, market and economic conditions;

    - the possibility of other strategic alternatives to the merger for
      enhancing stockholder value; and

    - the financial presentation, including the written opinion dated May 16,
      2000, of UBS Warburg to the TriZetto board as to the fairness, from a
      financial point of view, and as of the date of the opinion, to TriZetto of
      the merger consideration, as described below under the caption "Opinion of
      TriZetto's Financial Advisor."

    The TriZetto board also identified and considered certain negative factors,
including the risks that the operations of TriZetto and Erisco might not be
successfully integrated, that the number of shares of TriZetto common stock to
be issued to IMS HEALTH in the merger is fixed if the average trading price of
TriZetto exceeds $29.00 and that the potential benefits of the merger may not be
fully realized.

    The discussion above addresses the material factors considered by TriZetto's
board of directors in its consideration of the merger. In view of the variety of
factors and the amount of information considered, TriZetto's board of directors
did not find it practicable to, and did not, make specific assessments of,
quantify or otherwise assign relative weights to the specific factors considered
in reaching its determination. The determination was made after consideration of
all of the factors as a whole. In addition, individual members of TriZetto's
board of directors may have given different weights to different factors.

    The TriZetto board has approved the merger agreement and the merger,
declared that the merger agreement and the merger are advisable and determined
that the merger is fair to, and in the best interests of, TriZetto and the
TriZetto stockholders. Accordingly, the TriZetto board recommends that the
TriZetto stockholders vote "FOR" the approval of the issuance of shares of
TriZetto's common stock to IMS HEALTH in connection with the merger.

OPINION OF TRIZETTO'S FINANCIAL ADVISOR

    On May 16, 2000, at a meeting of the TriZetto board held to evaluate the
proposed merger, UBS Warburg delivered to TriZetto's board of directors an oral
opinion, which opinion was confirmed by delivery of a written opinion dated the
same date, to the effect that, as of that date and based on and subject to
various assumptions, matters considered and limitations described in the
opinion, the merger consideration was fair, from a financial point of view, to
TriZetto.

    The full text of UBS Warburg's opinion describes, among other things, the
assumptions made, procedures followed, matters considered and limitations on the
review undertaken by UBS Warburg. This opinion is attached as Appendix B and is
incorporated into this document by reference. UBS WARBURG'S OPINION IS DIRECTED
ONLY TO THE FAIRNESS, FROM A FINANCIAL POINT OF VIEW, TO TRIZETTO OF THE MERGER
CONSIDERATION. THE OPINION DOES NOT ADDRESS TRIZETTO'S UNDERLYING BUSINESS
DECISION TO EFFECT THE MERGER OR CONSTITUTE A RECOMMENDATION TO ANY HOLDER OF
TRIZETTO COMMON STOCK AS TO HOW TO VOTE WITH RESPECT TO ANY MATTERS RELATING TO
THE PROPOSED MERGER. HOLDERS OF TRIZETTO COMMON STOCK ARE ENCOURAGED TO READ
THIS OPINION CAREFULLY IN ITS ENTIRETY. The summary of UBS Warburg's opinion
described below is qualified in its entirety by reference to the full text of
its opinion.

    In arriving at its opinion, UBS Warburg, among other things:

    - reviewed publicly available business and historical financial information
      relating to TriZetto and Erisco;

                                       42
<PAGE>
    - reviewed internal financial information and other data relating to
      TriZetto's and Erisco's businesses and financial prospects and the
      potential incremental revenue, cost savings and other synergies
      anticipated to result from the merger, including estimates and financial
      forecasts prepared by the managements of TriZetto, IMS HEALTH and Erisco,
      that were provided to UBS Warburg by TriZetto, IMS HEALTH and Erisco and
      not publicly available;

    - conducted discussions with members of the senior managements of TriZetto,
      IMS HEALTH and Erisco;

    - reviewed publicly available financial and stock market data with respect
      to other companies in lines of business that UBS Warburg believed to be
      generally comparable to those of TriZetto and Erisco;

    - reviewed a draft dated May 15, 2000 of the merger agreement; and

    - conducted other financial studies, analyses and investigations, and
      considered other information, as UBS Warburg deemed necessary or
      appropriate.

    In connection with its review, with TriZetto's consent, UBS Warburg did not
assume any responsibility for independent verification of any of the information
that UBS Warburg was provided or reviewed for the purpose of its opinion and,
with TriZetto's consent, UBS Warburg relied on that information being complete
and accurate in all material respects. In addition, at TriZetto's direction, UBS
Warburg did not make any independent evaluation or appraisal of any of the
assets or liabilities, contingent or otherwise, of TriZetto or Erisco, and was
not furnished with any evaluation or appraisal.

    With respect to the financial forecasts and estimates that it reviewed, UBS
Warburg assumed, at TriZetto's direction, that they were reasonably prepared on
a basis reflecting the best currently available estimates and judgments of the
managements of TriZetto, IMS HEALTH and Erisco as to TriZetto's and Erisco's
future financial performance and the potential incremental revenue, cost savings
and other synergies anticipated to result from the merger, including the amount,
timing and achievability of those synergies. UBS Warburg also assumed, with
TriZetto's consent, that the merger would be treated as a tax-free
reorganization for federal income tax purposes and would be accounted for as a
purchase for financial accounting purposes. In addition, representatives of
TriZetto advised UBS Warburg, and UBS Warburg therefore assumed, that the final
terms of the merger agreement would not vary materially from those reviewed by
UBS Warburg. UBS Warburg's opinion is necessarily based on economic, monetary,
market and other conditions existing, and information available to UBS Warburg,
on the date of its opinion.

    At TriZetto's direction, UBS Warburg was not asked to, and did not, offer
any opinion as to the material terms or obligations of the merger agreement or
any related documents, or the form of the merger. UBS Warburg expressed no
opinion as to the value of TriZetto common stock when issued in the merger or
the prices at which TriZetto common stock will trade or otherwise be
transferable after announcement or consummation of the merger. In rendering its
opinion, UBS Warburg assumed, with TriZetto's consent, that each of TriZetto,
IMS HEALTH and Erisco would comply with all material covenants and agreements
in, and other material terms of, the merger agreement and that the merger would
be validly consummated in accordance with its terms. TriZetto imposed no other
instructions or limitations upon UBS Warburg with respect to the investigations
made or the procedures followed by UBS Warburg in rendering its opinion.

    In connection with rendering its opinion to TriZetto's board of directors,
UBS Warburg performed a variety of financial analyses which are summarized
below. The following summary is not a complete description of all of the
analyses performed and factors considered by UBS Warburg in connection with its
opinion. The preparation of a fairness opinion is a complex process involving
subjective judgments and is not necessarily susceptible to partial analysis or
summary description. With respect to the analysis of selected publicly traded
companies summarized below, no company used as a comparison is

                                       43
<PAGE>
either identical or directly comparable to TriZetto or Erisco. These analyses
necessarily involve complex considerations and judgments concerning financial
and operating characteristics and other factors that could affect the public
trading values of the companies concerned.

    UBS Warburg believes that its analyses and the summary below must be
considered as a whole and that selecting portions of its analyses and factors or
focusing on information presented in tabular format, without considering all
analyses and factors or the narrative description of the analyses, could create
a misleading or incomplete view of the processes underlying UBS Warburg's
analyses and opinion. None of the analyses performed by UBS Warburg was assigned
greater significance by UBS Warburg than any other. UBS Warburg arrived at its
ultimate opinion based on the results of all the analyses undertaken by it and
assessed as a whole. UBS Warburg did not draw, in isolation, conclusions from or
with regard to any one factor or method of analysis.

    The estimates of future performance of TriZetto and Erisco provided by the
managements of TriZetto, IMS HEALTH and Erisco in or underlying UBS Warburg's
analyses are not necessarily indicative of future results of values, which may
be significantly more or less favorable than those estimates. In performing its
analyses, UBS Warburg considered industry performance, general business and
economic conditions and other matters, many of which are beyond the control of
TriZetto, IMS HEALTH and Erisco. Estimates of the financial value of companies
do not purport to be appraisals or necessarily reflect the prices at which
companies actually may be sold.

    The merger consideration was determined through negotiation between TriZetto
and IMS HEALTH and the decision to enter into the merger was solely that of
TriZetto's board of directors. UBS Warburg's opinion and financial analyses were
only one of many factors considered by TriZetto's board of directors in its
evaluation of the merger and should not be viewed as determinative of the views
of TriZetto's board of directors or management with respect to the merger or the
merger consideration.

    The following is a brief summary of the material financial analyses
performed by UBS Warburg and reviewed with TriZetto's board of directors in
connection with its opinion dated May 16, 2000. THE FINANCIAL ANALYSES
SUMMARIZED BELOW INCLUDE INFORMATION PRESENTED IN TABULAR FORMAT. IN ORDER TO
FULLY UNDERSTAND UBS WARBURG'S FINANCIAL ANALYSES, THE TABLES MUST BE READ
TOGETHER WITH THE TEXT OF EACH SUMMARY. THE TABLES ALONE DO NOT CONSTITUTE A
COMPLETE DESCRIPTION OF THE FINANCIAL ANALYSES. CONSIDERING THE DATA BELOW
WITHOUT CONSIDERING THE FULL NARRATIVE DESCRIPTION OF THE FINANCIAL ANALYSES,
INCLUDING THE METHODOLOGIES AND ASSUMPTIONS UNDERLYING THE ANALYSES, COULD
CREATE A MISLEADING OR INCOMPLETE VIEW OF UBS WARBURG'S FINANCIAL ANALYSES.

ANALYSIS OF SELECTED PUBLIC COMPANIES

    ERISCO.  UBS Warburg compared selected financial information and operating
statistics for Erisco to corresponding financial information and operating
statistics of the following 15 selected publicly held companies in the
healthcare information system and connectivity and e-business sectors of the
healthcare industry:

<TABLE>
<CAPTION>
        HEALTHCARE INFORMATION SYSTEM SECTOR                   CONNECTIVITY AND E-BUSINESS SECTOR
----------------------------------------------------  ----------------------------------------------------
<S>                                                   <C>
- Dendrite International, Inc.                        - Allscripts, Inc.
- Infocure Corporation                                - CareInsite, Inc.
- Medical Manager Corporation                         - Cybear, Inc.
- ProxyMed, Inc.                                      - eBenX, Inc.
- QuadraMed Corporation                               - MedicalLogic, Inc.
- The Reynolds and Reynolds Company                   - Xcare.net, Inc.
- Cerner Corporation
- Eclipsys Corporation
- IDX Systems Corporation
</TABLE>

                                       44
<PAGE>
    UBS Warburg reviewed enterprise values, calculated as equity value, plus
debt, less cash, as multiples of latest 12 months revenue, earnings before
interest, taxes, depreciation and amortization, commonly known as EBITDA, and
earnings before interest and taxes, commonly known as EBIT, and equity values as
a multiple of latest 12 months and estimated calendar years 2000 and 2001 net
income for the selected companies in the healthcare information system sector.
UBS Warburg also reviewed enterprise values as a multiple of calendar year 1999
and estimated calendar years 2000 and 2001 revenue for the selected companies in
the connectivity and e-business sector. UBS Warburg then compared the implied
multiples derived for the selected companies with the multiples implied for
Erisco based on the merger consideration and the closing price of TriZetto
common stock on May 15, 2000. Multiples for the selected companies also were
based on closing stock prices on May 15, 2000. Estimated financial data for the
selected companies were based on publicly available research analysts' estimates
and public filings and estimated financial data for Erisco were based on
internal estimates of the managements of IMS HEALTH and Erisco. This analysis
indicated the following implied low, mean, median and high enterprise and equity
value multiples for the selected companies, as compared to the multiples for
Erisco implied in the merger based on the merger consideration and the closing
price of TriZetto common stock on May 15, 2000:

<TABLE>
<CAPTION>
                                                IMPLIED MULTIPLES OF SELECTED
                                                   COMPANIES IN HEALTHCARE            IMPLIED MULTIPLES OF ERISCO BASED
                                                  INFORMATION SYSTEM SECTOR                ON MERGER CONSIDERATION
                                          -----------------------------------------   ---------------------------------
                                            LOW        MEAN      MEDIAN      HIGH
                                          --------   --------   --------   --------
<S>                                       <C>        <C>        <C>        <C>        <C>
ENTERPRISE VALUES:
Latest 12 months revenue................    0.7x       2.4x       1.6x        6.0x                   4.8x
Latest 12 months EBITDA.................    4.0x      24.6x      15.3x       66.9x                  17.8x
Latest 12 months EBIT...................    6.0x      24.4x      13.6x       60.8x                  28.4x

EQUITY VALUES:
Latest 12 months net income.............    7.1x      46.9x      35.2x      125.8x                  43.2x
Estimated calendar year 2000 net
  income................................   13.8x      30.8x      25.2x       59.8x                  40.5x
Estimated calendar year 2001 net
  income................................   12.4x      25.3x      22.7x       42.3x                  37.5x
</TABLE>

<TABLE>
<CAPTION>
                                                 IMPLIED MULTIPLES OF SELECTED
                                                 COMPANIES IN CONNECTIVITY AND         IMPLIED MULTIPLES OF ERISCO BASED
                                                       E BUSINESS SECTOR                    ON MERGER CONSIDERATION
                                           -----------------------------------------   ---------------------------------
                                             LOW        MEAN      MEDIAN      HIGH
                                           --------   --------   --------   --------
<S>                                        <C>        <C>        <C>        <C>        <C>
ENTERPRISE VALUES:
Calendar year 1999 revenue...............    0.3x      84.0x      22.5x      317.9x                   4.8x
Estimated calendar year 2000 revenue.....    0.1x       9.8x       6.6x       21.9x                   4.0x
Estimated calendar year 2001 revenue.....    0.0x       4.0x       3.1x        9.4x                   3.5x
</TABLE>

    TRIZETTO.  UBS Warburg also compared selected financial information and
operating statistics for TriZetto with corresponding financial information and
operating statistics of the following six selected publicly held companies in
the application service provider sector of the healthcare industry:

    - Breakaway Solutions, Inc.

    - MedicaLogic, Inc.

    - Critical Path, Inc.

    - FutureLink Corp.

    - Interliant, Inc.

    - USinternetworking, Inc.

    UBS Warburg reviewed enterprise values as a multiple of calendar year 1999
and estimated calendar years 2000 and 2001 revenue. UBS Warburg then compared
the implied multiples derived for the selected companies with the multiples
implied for TriZetto based on the closing price of TriZetto

                                       45
<PAGE>
common stock on May 15, 2000. Multiples for the selected companies also were
based on closing stock prices on May 15, 2000. Estimated financial data for the
selected companies were based on publicly available research analysts' estimates
and public filings and estimated financial data for TriZetto were based on
internal estimates of TriZetto's management. This analysis indicated the
following implied low, mean, median and high enterprise value multiples for the
selected companies, as compared to the multiples implied for TriZetto based on
the closing stock price of TriZetto common stock on May 15, 2000:

<TABLE>
<CAPTION>
                                              IMPLIED MULTIPLES OF SELECTED         IMPLIED MULTIPLES OF TRIZETTO BASED
                                            COMPANIES IN APPLICATION SERVICE           ON CLOSING PRICE OF TRIZETTO
                                                     PROVIDER SECTOR                   COMMON STOCK ON MAY 15, 2000
                                        -----------------------------------------   -----------------------------------
                                          LOW        MEAN      MEDIAN      HIGH
                                        --------   --------   --------   --------
<S>                                     <C>        <C>        <C>        <C>        <C>
ENTERPRISE VALUES:
Calendar year 1999 revenue............   11.2x      51.7x      35.4x      140.9x                   16.8x
Estimated calendar year 2000
  revenue.............................    6.4x      13.4x      12.2x       22.3x                    7.3x
Estimated calendar year 2001
  revenue.............................    2.2x       5.7x       5.0x        9.6x                    4.9x
</TABLE>

DISCOUNTED CASH FLOW ANALYSIS

    UBS Warburg performed an analysis of the present value of the unlevered,
after-tax free cash flows that Erisco could generate over estimated calendar
years 2000 through 2004 based on internal estimates of the managements of IMS
HEALTH and Erisco, both before and after giving effect to the potential
incremental revenue, cost savings and other synergies anticipated by TriZetto's
management to result from the merger in estimated calendar years 2000 through
2003. UBS Warburg applied multiples of 17.5x, 20.0x and 22.5x to Erisco's
estimated calendar year 2004 net income using discount rates of 12%, 13%, 14%,
15% and 16%. This analysis indicated an implied equity reference range for
Erisco of approximately $178 million to $234 million, including $25 million in
excess cash, before giving effect to incremental revenue, cost savings and other
synergies and approximately $276 million to $374 million, including $25 million
in excess cash, after giving effect to incremental revenue, cost savings and
other synergies, as compared to the equity value for Erisco implied in the
merger of $255 million based on the merger consideration and the closing price
of TriZetto common stock on May 15, 2000.

CONTRIBUTION ANALYSIS

    UBS Warburg analyzed TriZetto's and Erisco's contributions to the combined
company's revenue, EBITDA, EBIT and net income for estimated calendar years 2000
through 2004 based on internal estimates of the managements of TriZetto, IMS
HEALTH and Erisco. Financial statistics that were not meaningful due to
operating losses have been reflected as "nm." This analysis indicated the
following relative contributions of TriZetto and Erisco:

<TABLE>
<CAPTION>
                                                                2000       2001       2002       2003       2004
                                                              --------   --------   --------   --------   --------
<S>                                                           <C>        <C>        <C>        <C>        <C>
REVENUE
  TriZetto..................................................    57.1%      63.1%      67.3%      70.7%      73.9%
  Erisco....................................................    42.9%      36.9%      32.7%      29.3%      26.1%
EBITDA
  TriZetto..................................................      nm       40.7%      64.3%      70.4%      73.6%
  Erisco....................................................      nm       59.3%      35.7%      29.6%      26.4%
EBIT
  TriZetto..................................................      nm         nm       58.0%      68.5%      72.9%
  Erisco....................................................      nm         nm       42.0%      31.5%      27.1%
</TABLE>

    Based on the merger consideration of $255 million, the closing price of
TriZetto common stock on May 15, 2000 and the net debt contributed by TriZetto
and Erisco, upon consummation of the merger, TriZetto would represent
approximately 70.6%, and Erisco would represent approximately 29.4%, of

                                       46
<PAGE>
the enterprise value of the combined company. Based on the merger consideration
of $255 million and the closing price of TriZetto common stock on May 15, 2000,
upon consummation of the merger, current stockholders of TriZetto would own
approximately 69.2%, and current stockholders of IMS HEALTH would own
approximately 30.8%, of the combined company.

OTHER FACTORS

    In rendering its opinion, UBS Warburg also reviewed and considered other
factors, including:

    - historical market prices and volume for TriZetto common stock and the
      relationship between movements in TriZetto common stock, movements in IMS
      HEALTH common stock, movements in a healthcare business-to-business index,
      movements in a healthcare information technology index, movements in an
      application service provider index and movements in the NASDAQ index;

    - the present value of the potential incremental revenue, cost savings and
      other synergies anticipated by TriZetto's management to result from the
      merger; and

    - the potential pro forma financial effect of the merger on TriZetto's
      estimated earnings per share and cash earnings per share in estimated
      calendar years 2000 through 2003 after giving effect to potential
      incremental revenue, cost savings and other synergies anticipated by
      TriZetto's management to result from the merger.

MISCELLANEOUS

    TriZetto has agreed to pay UBS Warburg for its financial advisory services
upon completion of the merger an aggregate fee of $4.0 million. In addition,
TriZetto has agreed to reimburse UBS Warburg for its reasonable expenses,
including fees and reasonable disbursements of its legal counsel, and to
indemnify UBS Warburg and related parties against certain liabilities, including
liabilities under federal securities laws, relating to, or arising out of, its
engagement.

    TriZetto selected UBS Warburg as its financial advisor in connection with
the merger because UBS Warburg is an internationally recognized investment
banking firm with substantial experience in similar transactions. UBS Warburg is
continually engaged in the valuation of businesses and their securities in
connection with mergers and acquisitions, leveraged buyouts, negotiated
underwritings, competitive bids, secondary distributions of listed and unlisted
securities and private placements.

    In the ordinary course of business, UBS Warburg, its successors and
affiliates may actively trade the securities of TriZetto and IMS HEALTH for
their own accounts and the accounts of their customers and, accordingly, may at
any time hold a long or short position in those securities.

TAX OPINIONS

    The parties have not requested and will not request a ruling from the
Internal Revenue Service regarding the tax consequences of the merger. The
merger agreement provides that the merger is conditioned upon the receipt as of
the closing date by IMS HEALTH of an opinion of Sullivan & Cromwell, legal
counsel to IMS HEALTH, and the receipt as of the closing date by TriZetto of an
opinion of Stradling Yocca Carlson & Rauth, legal counsel to TriZetto, in each
case subject to the qualifications discussed below, to the effect that, on the
basis of facts, representations and reasonable assumptions set forth in those
opinions, for United States federal income tax purposes, the merger will be
treated as a "reorganization" within the meaning of Section 368 of the Internal
Revenue Code.

    In rendering the tax opinions with respect to the matters described above
and as to the accuracy of the discussion herein of certain United States federal
income tax consequences of the merger, counsel will rely upon, and will assume
as accurate and correct (without any independent investigation) certain

                                       47
<PAGE>
representations as to factual matters contained in certificates delivered by IMS
HEALTH, TriZetto and others. If such representations as to factual matters are
inaccurate, the opinions could be adversely affected.

    The tax opinions will represent tax counsels' best judgment as to the tax
treatment of the merger, but will not be binding on the IRS, and TriZetto cannot
assure you that the IRS will not contest the conclusions expressed therein. The
balance of the discussion regarding the tax consequences of the merger is based
on the conclusions set forth in the opinions of tax counsel that the merger will
be treated as a reorganization under Section 368 of the Internal Revenue Code.

CERTAIN U.S. FEDERAL INCOME TAX CONSEQUENCES OF THE MERGER

    The merger is intended to constitute a reorganization within the meaning of
the Internal Revenue Code. Subject to the limitations and qualifications set
forth below, the merger will generally result in the following U.S. federal
income tax consequences:

    - The merger will qualify as a reorganization within the meaning of
      Section 368(a) of the Internal Revenue Code and Erisco, Elbejay
      Acquisition Corp. and TriZetto will each be a party to the reorganization
      within the meaning of Section 368(b) of the Internal Revenue Code;

    - None of Erisco, TriZetto or the TriZetto stockholders will recognize
      income, gain or loss as a result of the consummation of the merger;

    - No gain or loss will be recognized by IMS HEALTH, as the owner of Erisco
      common stock, solely upon its receipt of TriZetto common stock in exchange
      for Erisco common stock in the merger;

    - The aggregate tax basis of the TriZetto common stock received by IMS
      HEALTH in the merger will be the same as the aggregate tax basis of the
      Erisco common stock surrendered in exchange therefor; and

    - The holding period of the TriZetto common stock received by IMS HEALTH in
      the merger will include the period for which the Erisco common stock
      surrendered in exchange therefor was considered to be held, provided that
      the Erisco common stock so surrendered is held as a capital asset at the
      time of the merger.

REQUIRED REGULATORY FILINGS AND APPROVALS

    Under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, and the
rules promulgated under the Hart-Scott-Rodino Act, TriZetto and IMS HEALTH
cannot complete the merger until they notify and furnish information regarding
the acquisition of Erisco by TriZetto and the acquisition of shares of TriZetto
common stock by IMS HEALTH to the Federal Trade Commission and the Antitrust
Division of the U.S. Department of Justice and satisfy specified waiting period
requirements. TriZetto and IMS HEALTH filed notification and report forms under
the Hart-Scott-Rodino Act with the FTC and the Antitrust Division on August 3,
2000 and received early termination of the waiting period on August   , 2000.

    At any time before or after completion of the merger, the Antitrust Division
or the FTC could take such action under the antitrust laws as it deems necessary
or desirable in the public interest, including seeking to enjoin the
consummation of the merger or seeking divestiture of substantial assets of
TriZetto, IMS HEALTH or Erisco. Private parties may also bring actions under the
antitrust laws under certain circumstances. Although TriZetto and IMS HEALTH
believe that the merger is legal under the antitrust laws, there can be no
assurance that a challenge to the merger on antitrust grounds will not be made
or, if such a challenge is made, that it would not be successful.

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    Neither IMS HEALTH nor TriZetto is aware of any other material governmental
or regulatory approval required for completion of the merger.

RESTRICTED SHARES

    All shares of TriZetto common stock issued to IMS HEALTH in connection with
the merger will be restricted shares and will not be available for public resale
unless such shares are registered under the Securities Act or sold pursuant to
Rule 144 promulgated under the Securities Act. In addition, pursuant to a
stockholder agreement to be entered into by and between TriZetto and IMS HEALTH
prior to the closing, IMS HEALTH may not transfer any shares of TriZetto common
stock received in the merger for two years following the merger, subject to
limited exceptions.

    In general, under Rule 144, any person who has beneficially owned restricted
shares for at least one year is entitled to sell, within any three-month period,
a number of shares that does not exceed the greater of 1% of the then
outstanding shares of TriZetto common stock, approximately             shares
immediately following the merger, or the average weekly trading volume during
the four calendar weeks preceding such sale. Sales under Rule 144 are also
subject to requirements as to the manner of sale, notice and availability of
current public information about TriZetto. In addition, restricted shares that
have been beneficially owned for at least two years and that are held by
non-affiliates may be sold free of any restrictions under Rule 144.

    Pursuant to a registration rights agreement to be executed by and between
TriZetto and IMS HEALTH prior to or concurrently with the consummation of the
merger, IMS HEALTH will have the right, beginning two years following
consummation of the merger, to cause TriZetto, on no more than three occasions,
to register its shares under the Securities Act by providing TriZetto with a
written demand for the registration of at least 20% of the shares of TriZetto
common stock then held by IMS HEALTH. IMS HEALTH may also require TriZetto to
include the shares of TriZetto common stock then held by IMS HEALTH in any
registration statement proposed to be filed by TriZetto with respect to TriZetto
common stock commencing two years after consummation of the merger, subject to
limitations on the number of shares that may be included.

MANAGEMENT AND OPERATIONS FOLLOWING THE MERGER

    Following the merger, TriZetto will continue the operations of Erisco and
TriZetto's board of directors will include one member to be designated by IMS
HEALTH, for so long as IMS HEALTH owns 10% of the outstanding shares of TriZetto
as of the date of the closing. IMS HEALTH will become a significant stockholder
of TriZetto, owning approximately   % of TriZetto's outstanding shares of common
stock and its rights as a stockholder will be governed by TriZetto's Amended and
Restated Certificate of Incorporation and Bylaws and the stockholder agreement
to be entered into between TriZetto and IMS HEALTH. See "Stockholder Agreement."
According to the stockholder agreement, for so long as IMS HEALTH owns at least
10% of the outstanding shares of common stock as of the date of the closing,
TriZetto may not enter into or approve any merger, consolidation, purchase or
sale of assets or equity interests, business combination or similar transaction
or any equity based joint venture or similar transaction with specified
competitors or potential competitors of IMS HEALTH without the consent of IMS
HEALTH. This consent, however, shall not be required if it is determined that
the fiduciary duties of TriZetto's board of directors require TriZetto to enter
into or consummate any such transaction.

INTERESTS OF CERTAIN PERSONS IN THE MERGER

    TriZetto's directors and executive officers do not have interests in the
merger that are in addition to their interests as TriZetto stockholders
generally.

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OPTION GRANTS TO ERISCO EMPLOYEES

    Pursuant to the Merger Agreement, TriZetto has agreed that it will grant
options to purchase an aggregate of 1,200,000 shares of TriZetto common stock to
Erisco employees as soon as practicable after consummation of the merger. The
determination of the number of shares purchasable under options to be granted to
each Erisco employee will be at the discretion of TriZetto's board of directors.

NO APPRAISAL RIGHTS

    Under Delaware General Corporation Law, stockholders of TriZetto are not
entitled to appraisal rights with respect to the issuance of shares of TriZetto
in connection with the merger or any other matters addressed herein.

ACCOUNTING TREATMENT

    The merger will be accounted for using the "purchase" method in accordance
with Accounting Principles Board Opinion No. 16. Accordingly, the assets and
liabilities of Erisco will be recorded on the books of TriZetto at their
respective fair values at the effective time of the merger, with the excess
allocated to goodwill.

                                       50
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                              THE MERGER AGREEMENT

    THE FOLLOWING SUMMARY DESCRIBES CERTAIN ASPECTS OF THE PROPOSED MERGER,
INCLUDING MATERIAL PROVISIONS OF THE MERGER AGREEMENT. THIS SUMMARY MAY NOT
CONTAIN ALL OF THE INFORMATION THAT IS IMPORTANT TO YOU. TO UNDERSTAND THE
MERGER FULLY, AND FOR A MORE COMPLETE DESCRIPTION OF THE LEGAL TERMS OF THE
MERGER, YOU ARE URGED TO READ THE MERGER AGREEMENT CAREFULLY. A COPY OF THE
MERGER AGREEMENT IS ATTACHED AS APPENDIX A.

STRUCTURE OF THE MERGER

    The merger agreement provides for the merger of Elbejay Acquisition Corp., a
Delaware corporation and a wholly owned subsidiary of TriZetto, with and into
Erisco, with Erisco surviving the merger as a wholly owned subsidiary of
TriZetto. The merger will become effective upon the filing of a certificate of
merger with the Secretary of State of the State of Delaware and the filing of a
certificate of merger with the Secretary of State of the State of New York. It
is anticipated that these filings will be made as soon as practicable after the
last of the conditions to the merger, as set forth in the merger agreement, has
been satisfied or waived.

    When the merger is completed:

    - the separate corporate existence of Elbejay Acquisition Corp. will
      terminate;

    - the surviving company will be a New York corporation named ERISCO Managed
      Care Technologies, Inc.;

    - Erisco will be a wholly owned subsidiary of TriZetto;

    - the Certificate of Incorporation and Bylaws of Erisco existing immediately
      prior to the merger will be the certificate of incorporation and bylaws of
      the surviving company;

    - IMS HEALTH will receive TriZetto common stock in the merger representing
      approximately     % of TriZetto's outstanding common stock after the
      merger (based on the closing price per share of TriZetto common stock on
      August   , 2000, which was the last closing price available at the time of
      printing this proxy statement); and

    - IMS HEALTH shall be entitled to designate one person to be appointed to
      TriZetto's board of directors.

    TriZetto hopes to complete the merger in the third quarter of 2000.

    Pursuant to the merger agreement, TriZetto and IMS HEALTH agreed to
terminate the Agreement and Plan of Reorganization, dated as of March 28, 2000,
entered into between TriZetto and IMS HEALTH in connection with the proposed
TriZetto-IMS HEALTH merger, without liability to either party.

MERGER CONSIDERATION

    In the merger, the shares of Erisco common stock issued and outstanding
immediately prior to the effective time of the merger will be converted, in the
aggregate, into the right to receive the number of shares of TriZetto common
stock equal to $255 million divided by the average closing price of TriZetto
common stock during the 15 trading days ending on the third trading day prior to
the closing date. However, if the average closing price is less than $21.00,
then the number of shares that will be issued to IMS HEALTH will be 12,142,857,
and if the average closing price is greater $29.00, the number of shares that
will be issued to IMS HEALTH will be 8,793,103. No fractional shares of TriZetto
common stock will be issued in the merger.

    The total number of shares of TriZetto common stock to be issued in the
merger will not be determined until the time of the merger. Because stock prices
fluctuate, the market value of the shares

                                       51
<PAGE>
of TriZetto common stock that IMS HEALTH receives in the merger may increase or
decrease following the merger.

    Erisco does not have any stock option or other stock purchase plans.
Therefore, no options to purchase shares of TriZetto common stock will be issued
to assume existing stock options or other stock purchase rights.

REPRESENTATIONS AND WARRANTIES

    IMS HEALTH, Erisco and TriZetto each made a number of representations and
warranties in the merger agreement regarding each party's authority to enter
into the merger agreement and to consummate the transactions contemplated
thereby, and with regard to aspects of their businesses, financial condition,
structure and other aspects pertinent to the merger. All representations and
warranties of the parties to the merger agreement will survive consummation of
the merger until June 30, 2001.

    The representations given by IMS HEALTH and Erisco, jointly and severally,
cover the following topics as they relate to Erisco:

    - due organization and good standing;

    - corporate authority to enter into the merger agreement and related
      matters;

    - capital structure of Erisco;

    - absence of conflicts with organizational documents and material agreements
      of Erisco;

    - necessary regulatory approvals;

    - reports filed by IMS HEALTH with the SEC;

    - Erisco's compliance with laws;

    - litigation involving Erisco;

    - employee benefit matters for Erisco employees;

    - absence of undisclosed liabilities since the date of Erisco's most recent
      balance sheet;

    - absence of certain changes since the date of Erisco's most recent balance
      sheet;

    - Erisco's taxes;

    - intellectual property rights of Erisco;

    - Erisco's compliance with environmental laws;

    - finders or brokers engaged in connection with the merger;

    - transactions between Erisco and its officers, directors or other
      affiliated persons;

    - authorization and recommendation by the Erisco board of directors;

    - the vote required to approve the merger;

    - absence of restrictions on the ability of Erisco to conduct its business;

    - the inapplicability of state anti-takeover statutes to the merger;

    - financial statements of Erisco;

    - deferred revenue and accounts receivable;

    - warranty claims and product returns;

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<PAGE>
    - Erisco's leasehold interests in real property;

    - Erisco's ownership interests in personal property

    - Erisco's insurance policies; and

    - Erisco's customers.

    The representations given by TriZetto, cover the following topics as they
relate to TriZetto:

    - due organization and good standing;

    - corporate authority to enter into the merger agreement and related
      matters;

    - capital structure of TriZetto;

    - absence of conflicts with organizational documents and material agreements
      of TriZetto;

    - necessary regulatory approvals;

    - reports filed by TriZetto with the SEC;

    - TriZetto's compliance with laws;

    - litigation involving TriZetto;

    - employee benefit matters for TriZetto employees;

    - absence of undisclosed liabilities since the date of TriZetto's most
      recent balance sheet;

    - absence of certain changes since the date of TriZetto's most recent
      balance sheet;

    - TriZetto's taxes;

    - intellectual property rights of TriZetto;

    - TriZetto's compliance with environmental laws;

    - finders or brokers engaged in connection with the merger;

    - transactions between TriZetto and its officers, directors or other
      affiliated persons;

    - authorization and recommendation by TriZetto's board of directors;

    - the vote required to approve the issuance of shares contemplated by the
      merger;

    - absence of restrictions on the ability of TriZetto to conduct its
      business;

    - the inapplicability of state anti-takeover statutes to the merger;

    The representations and warranties in the merger agreement are complicated
and not easily summarized. You are urged to carefully read the representations
and warranties of TriZetto, IMS HEALTH and Erisco in the merger agreement.

CONDUCT OF BUSINESS PRIOR TO THE MERGER

    ERISCO.  Erisco has agreed, and IMS HEALTH will cause Erisco, to continue to
conduct its business and maintain its business relationships in a manner that is
consistent with the ordinary and usual course of business of Erisco and not to
take certain specified actions that might materially affect Erisco without
TriZetto's written consent. Consistent with this covenant, Erisco has agreed to
carry on and to preserve its business and its relationships with customers,
suppliers, employees and others in substantially the same manner as it has prior
to the date of the merger agreement.

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<PAGE>
    TRIZETTO.  TriZetto has agreed to continue to conduct its business and
maintain its business relationships in a manner that is consistent with the
ordinary and usual course of business of TriZetto. In addition, TriZetto has
agreed not, without the prior written consent of IMS HEALTH, to sell or dispose
of 25% or more of the assets of TriZetto, enter into a merger in which TriZetto
would not be the surviving corporation, issue shares that would have the power
to vote 25% or more of the votes entitled to vote for the election of directors
or enter into certain strategic relationships or joint ventures.

ADOPTION OF STOCKHOLDER PROTECTION RIGHTS AGREEMENT

    Prior to the closing of the merger, TriZetto has agreed to adopt a
stockholder protection rights agreement or "poison pill" in a form reasonably
acceptable to IMS HEALTH. The stockholder protection rights agreement will
provide for the distribution of rights to existing stockholders that will enable
stockholders to buy newly issued shares of TriZetto at a substantial discount in
the event that an acquiror acquires 15% or more of the common stock of TriZetto
and the acquisition is not approved by TriZetto's board of directors. The rights
will also enable stockholders to buy shares of the acquiror at a substantial
discount in the event either TriZetto is acquired in a merger or other business
combination by the acquiror or 50% or more of the assets or earning power of
TriZetto is sold or transferred to the acquiror and the occurrence of one of the
above triggering events is not approved by TriZetto's board of directors. IMS
HEALTH, its affiliates and transferees of the TriZetto common stock issued to
IMS HEALTH in connection with the merger will be excluded from the term
"acquiror" as defined in the stockholder rights agreement. The purpose of the
stockholder protection rights agreement is to encourage potential acquirors to
negotiate with the board of directors of TriZetto, to enable the board to seek
competing bids and to give the board the ability to resist offers that are, in
its judgment, inadequate or coercive.

    Adoption of a stockholder protection rights agreement may have an
anti-takeover effect and may delay, defer or prevent a tender offer or takeover
attempt that a stockholder might consider in its best interest, including those
attempts that might result in a premium over the market price for the shares
held by TriZetto stockholders.

ADDITIONAL AGREEMENTS

    TRANSITIONAL SERVICES AGREEMENT.  Prior to or concurrently with the closing
of the merger, IMS HEALTH, Erisco and TriZetto will enter into a transitional
services agreement pursuant to which IMS HEALTH will continue to provide certain
administrative services, such as payroll processing, to Erisco for a period of
time following the merger. TriZetto will pay IMS HEALTH service fees for the
services provided based on the fair market value of such services.

    DATA RIGHTS AGREEMENT.  Prior to or concurrently with the closing of the
merger, IMS HEALTH and TriZetto will enter into a data rights agreement. This
agreement will grant IMS HEALTH an exclusive, worldwide, royalty-free, perpetual
license to all data rights currently held or acquired in the future by TriZetto
and its subsidiaries that arise from or relate to the business of Erisco. The
data rights agreement will also grant IMS HEALTH a worldwide license to all
other data rights currently held or acquired in the future by TriZetto and its
subsidiaries subject to mutually agreed upon terms and conditions which shall be
at least as favorable to IMS HEALTH in every material respect as other data
rights or similar agreements entered into by TriZetto and third parties.

    HEALTHWEB LICENSE AGREEMENT.  Prior to or concurrently with the closing of
the merger, IMS HEALTH and TriZetto will enter into a non-exclusive, three year
license agreement for IMS HEALTH to use TriZetto's HealthWeb technology. The
agreement calls for the payment of a $1 million per year licensing fee to
TriZetto. TriZetto will provide IMS HEALTH with such implementation and support
services as are customary with similar licenses granted by TriZetto.

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<PAGE>
    PREFERRED VENDOR STATUS.  The merger agreement provides that TriZetto shall
be the preferred applications services provider and transformation services
provider to IMS HEALTH for the five years following the closing. As the
preferred provider, to the extent TriZetto offers application services and
transformation services that IMS HEALTH seeks to obtain from a third party, at
levels of price, quality and service that are competitive with the levels
obtainable by IMS HEALTH in an arm's length transaction with a third party,
TriZetto will be given the first opportunity to submit bids to provide such
services. TriZetto and IMS HEALTH have agreed to cooperate in good faith and use
their respective reasonable best efforts to enter into an agreement with respect
to such preferred vendor status.

    APPLICATIONS SERVICES PROVIDER AGREEMENT.  Erisco and TriZetto have entered
into an agreement whereby TriZetto has been authorized to host Erisco's software
for TriZetto's customers on an application services provider basis on terms and
conditions that are no less favorable to application service provider agreements
entered into between TriZetto and other parties.

    REGISTRATION RIGHTS AGREEMENT.  Prior to or concurrently with the closing of
the merger, IMS HEALTH and TriZetto will enter into a registration rights
agreement, pursuant to which IMS HEALTH will receive certain demand and
piggyback registration rights. See "Related Agreements--Registration Rights
Agreement."

    STOCKHOLDER AGREEMENT.  Prior to or concurrently with the closing of the
merger, IMS HEALTH and TriZetto will enter into a stockholder agreement,
pursuant to which, among other things, IMS HEALTH will agree to certain
restrictions on the transferability of its shares of TriZetto common stock and
will agree not to acquire additional shares of TriZetto common stock or solicit
proxies for a period of four years, and TriZetto will agree to nominate an
individual designated by IMS HEALTH to TriZetto's board of directors, to obtain
the consent of IMS HEALTH before entering into certain specified transactions,
and not to adopt or amend any stockholder rights agreement in a manner that
adversely affects IMS HEALTH or its permitted transferees. See "Related
Agreements--Stockholder Agreement."

    ERISCO EMPLOYEE OPTIONS.  TriZetto has agreed that it will issue options to
purchase an aggregate of 1,200,000 shares of TriZetto common stock to Erisco
employees as soon as practicable following the closing of the merger. Options
granted to Erisco employees will be granted pursuant to TriZetto's 1998 Stock
Option Plan on such terms and conditions that are consistent with options
granted to TriZetto employees under the Plan.

    WORKING CAPITAL.  IMS HEALTH has agreed that immediately prior to the
closing of the merger, it will repay in cash to Erisco any indebtedness owed by
IMS HEALTH to Erisco plus an amount of cash such that IMS HEALTH contributes not
less than $32 million to Erisco. In addition, the amount of working capital,
defined for this purpose as accounts receivable plus prepaid expenses of Erisco,
minus accounts payable and accrued liabilities of Erisco, at the time of the
closing will be no less than negative $2 million and no more than $2 million. If
the amount of working capital is less than negative $2 million, IMS HEALTH will
pay TriZetto the amount of the difference, and if the working capital is more
than $2 million, TriZetto will pay IMS HEALTH the difference.

RESTRICTED SHARES OF TRIZETTO COMMON STOCK

    All shares of TriZetto common stock issued in the merger will be restricted
shares and will not be available for public resale unless such shares are
registered under the Securities Act or sold pursuant to Rule 144 promulgated
under the Securities Act. In addition, pursuant to a stockholder agreement to be
entered into between TriZetto and IMS HEALTH concurrently with the consummation
of the merger, IMS HEALTH may not transfer any shares of TriZetto common stock
received in the merger for two years following the merger, subject to limited
exceptions. See "The Merger--Restricted Shares" and "Registration Rights
Agreement."

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<PAGE>
CONDITIONS TO THE MERGER

    The obligations of IMS HEALTH and Erisco and of TriZetto under the merger
agreement are subject to the satisfaction or waiver of certain conditions
described in the merger agreement. These conditions include, but are not limited
to, conditions relating to:

    - the accuracy of representations and warranties in all material respects;

    - the performance of and compliance with covenants in all material respects;

    - the absence of material adverse changes to the financial condition,
      properties, assets, liabilities, businesses or results of operation of
      each of Erisco and TriZetto other than changes resulting from general
      economic conditions or conditions generally affecting the industries in
      which Erisco and TriZetto conduct their respective operations;

    - the absence of any order, decree or ruling or any statute or regulation
      which would prohibit the merger or render the merger illegal;

    - the receipt of all necessary governmental consents, including expiration
      or termination of the applicable waiting periods under U.S. antitrust
      laws;

    - the receipt of all consents or assignments required under material
      contracts of TriZetto and Erisco;

    - approval by the stockholders of TriZetto of the issuance of shares of
      TriZetto common stock to IMS HEALTH in connection with the merger;

    - the appointment of an IMS HEALTH designee to TriZetto's board of directors
      as a Class II director;

    - the receipt by each of IMS HEALTH and TriZetto of opinions of their
      respective tax counsel to the effect that the merger will qualify as a
      reorganization within the meaning of Section 368 of the Code;

    - the shares of TriZetto common stock to be issued in the merger shall have
      been approved for quotation on the Nasdaq National Market System;

    - IMS HEALTH and TriZetto shall have entered into the registration rights
      and stockholder agreements contemplated by the merger agreement; and

    - IMS HEALTH and TriZetto shall have entered into the transitional services,
      HealthWeb license and data rights agreements contemplated by the merger
      agreement.

TERMINATION RIGHTS

    The merger agreement may be terminated by mutual consent of IMS HEALTH and
TriZetto, or under certain circumstances, at any time prior to the merger,
whether before or after approval of the merger agreement by the TriZetto
stockholders, as summarized below:

    - by IMS HEALTH, if TriZetto has materially breached its representations and
      warranties or materially failed to perform its covenants and such breach
      or failure to perform has not been cured prior to the closing;

    - by TriZetto, if IMS HEALTH has materially breached its representations and
      warranties or materially failed to perform its covenants and such breach
      or failure to perform has not been cured prior to the closing;

                                       56
<PAGE>
    - by either IMS HEALTH or TriZetto, if the TriZetto special meeting shall
      have been held and the approval of the stockholders of TriZetto of the
      issuance of shares of TriZetto common stock to IMS HEALTH in connection
      with the merger shall not have been obtained;

    - by either IMS HEALTH or TriZetto, if all the conditions of the merger
      agreement have not be satisfied or waived on or before December 31, 2000,
      other than as a result of a breach by the terminating party; or

    - by either IMS HEALTH or TriZetto, if an order by a federal or state court
      that would make illegal or otherwise prohibit the consummation of the
      merger is issued and becomes final and nonappealable.

INDEMNIFICATION RIGHTS

    IMS HEALTH has agreed to indemnify TriZetto and its officers, directors,
stockholders, employees and agents for all losses and expenses incurred by them
that arise out of a breach of any representation or warranty of IMS HEALTH or
Erisco in the merger agreement or the failure by IMS HEALTH or Erisco to perform
any covenants made by IMS HEALTH or Erisco in the merger agreement. Similarly,
TriZetto has agreed to indemnify IMS HEALTH and its officers, directors,
stockholders, employees and agents for all losses and expenses incurred by them
that arise out of a breach of any representation or warranty of TriZetto or in
the merger agreement or the failure by TriZetto to perform any covenants made by
TriZetto in the merger agreement. Any claim for indemnification must be made
prior to June 30, 2001, at which time the representations, warranties and
covenants of each party will expire, except for covenants that specifically
continue for a longer period of time.

    TriZetto, IMS HEALTH and Erisco have each agreed to certain limitations on
the amount of losses that will be subject to an indemnification claim. No claim
for indemnification may be made unless the aggregate amount of all losses
incurred by the party entitled to indemnification exceeds $4 million, in which
event such party shall be entitled only for the amount of losses that exceed
$4 million. In addition, no party will be able to recover losses from the other
party in excess of $100 million, unless the breach or failure to perform is
intentional. The amount that the party entitled to indemnification may receive
will be further reduced by any insurance proceeds received by such party.

AMENDMENT AND WAIVER

    The merger agreement may be amended by the parties at any time before or
after the special meeting of the TriZetto stockholders, provided that any
amendment made after the special meeting that would otherwise require
stockholder approval under applicable law must be submitted to the stockholders.
All amendments to the merger agreement must be in writing signed by each party.
Any provision of the merger agreement may be waived in writing by the party
against whom the waiver is to be effective.

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                               RELATED AGREEMENTS

    THE FOLLOWING IS A BRIEF SUMMARY OF CERTAIN ASPECTS OF THE VOTING AGREEMENTS
ENTERED INTO BY CERTAIN STOCKHOLDERS OF TRIZETTO WITH IMS HEALTH AND THE
REGISTRATION RIGHTS AGREEMENT AND STOCKHOLDER AGREEMENT TO BE ENTERED INTO BY
TRIZETTO AND IMS HEALTH PRIOR TO OR CONCURRENTLY WITH THE CONSUMMATION OF THE
MERGER. THIS SUMMARY DOES NOT PURPORT TO BE COMPETE AND IS QUALIFIED IN ITS
ENTIRETY BY THE COMPLETE AGREEMENTS THAT ARE ATTACHED HERETO IN APPENDICES C-1,
C-2, C-3, D AND E.

VOTING AGREEMENTS.

    Certain holders of TriZetto common stock have entered into voting agreements
with IMS HEALTH, dated as of May 16, 2000, which provide that, until the earlier
of the closing of the merger or the termination of the merger agreement, such
stockholders will vote their shares (i) in favor of the issuance of shares of
TriZetto common stock to IMS HEALTH in connection with the merger and any
related matters, (ii) against any action or agreement that would compete with,
impede, interfere with or tend to discourage the merger or the issuance of
TriZetto's common stock to IMS HEALTH and (iii) against any action or agreement
that would result in any material breach of any obligation of TriZetto or
Elbejay under the merger agreement. In accordance with the voting agreements,
each such stockholder delivered an irrevocable proxy to IMS HEALTH to this
effect. Such stockholders have also agreed not to transfer or dispose of in any
manner any of their shares, except in accordance with the voting agreements. As
of the record date, such stockholders as a group beneficially owned 10,909,694
shares (exclusive of any shares issuable upon the exercise of options) of
TriZetto common stock, representing approximately 51% of the shares of TriZetto
common stock outstanding as of the record date. The forms of voting agreements
are attached to this proxy statement as Appendices C-1, C-2 and C-3 and should
be read carefully and in their entirety.

REGISTRATION RIGHTS AGREEMENT

    As a condition to the closing of the merger, TriZetto and IMS HEALTH, as the
sole stockholder of Erisco, shall enter into a registration rights agreement, a
form of which is attached to this proxy statement as Appendix D and should be
read carefully in its entirety. Under the registration rights agreement, IMS
HEALTH will have the right to cause TriZetto to register its shares under the
Securities Act as follows:

    - DEMAND REGISTRATION RIGHTS:  At any time following the date two years
      after the closing of the merger, IMS HEALTH may, on no more than three
      occasions, require TriZetto to prepare and file a registration statement
      to register shares of TriZetto common stock held by IMS HEALTH by
      providing a written demand to TriZetto for the registration of at least
      20% of the shares then held by IMS HEALTH. TriZetto will use its
      reasonable best efforts to effect such registration as soon as possible
      after receipt of notice.

    - PIGGYBACK REGISTRATION RIGHTS:  At any time following the date two years
      after the closing of the merger, IMS HEALTH may request to have its shares
      included in any registration statement filed by TriZetto under the
      Securities Act with respect to any proposed public offering by TriZetto or
      any holders of TriZetto common stock. Such registration opportunities are
      unlimited but the number of shares that can be registered may be
      eliminated entirely or reduced in certain situations at the request of the
      underwriters managing the offering of shares being registered.

    The registration rights will terminate on the earlier of ten years following
the closing of the merger or at such time as all of the shares received by IMS
HEALTH in the merger may be sold under Rule 144 promulgated under the Securities
Act without restriction.

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<PAGE>
STOCKHOLDER AGREEMENT

    As a condition to the closing of the merger, TriZetto and IMS HEALTH shall
enter into a stockholder agreement, a copy of which is attached to this proxy
statement as Appendix E and should be read carefully in its entirety. The
stockholder agreement provides for the following, among other things:

    - STANDSTILL PROVISIONS.  For a period of four years after the closing of
      the merger, or until a transaction that results in, or until an
      announcement by TriZetto of its willingness to enter into a transaction
      that would result in, a change in control of TriZetto, whichever is
      earlier, IMS HEALTH shall not engage in certain activities without the
      prior written consent of TriZetto. These activities include:
      (i) participating in one or more stockholder proposals relating to
      TriZetto; (ii) seeking to remove any directors or alter the size or
      composition of TriZetto's board of directors; (iii) forming or
      participating in a group, as defined in Rule 13d-5 of the Securities
      Exchange Act of 1934, as amended (referred to in this proxy statement as
      the Exchange Act); (iv) depositing any shares of TriZetto common stock
      into a voting trust or entering into any arrangement or agreement with
      respect to the voting or transfer of such shares; (v) acquiring or
      offering or agreeing to acquire beneficial ownership of any shares of
      TriZetto (except for the shares issued in connection with the merger);
      (vi) making or participating in any solicitation of proxies to vote or
      seek to influence any person with respect to the voting of any securities
      of TriZetto entitled to vote in the election of TriZetto's directors; and
      (vii) various other activities set forth in the stockholder agreement.

    - SHARE TRANSFER.  For a period of two years after the closing of the merger
      or until IMS HEALTH no longer beneficially owns at least 10% of the
      outstanding shares of TriZetto common stock, measured as of the closing of
      the merger, or a transaction shall have occurred that results in a change
      in control of TriZetto, whichever is earlier, IMS HEALTH shall not sell,
      transfer, assign or otherwise dispose of or encumber any shares of
      TriZetto common stock received in the merger, without the prior written
      consent of TriZetto, subject to limited exceptions.

    - RIGHT OF FIRST REFUSAL.  For a period of time commencing on the date that
      the share transfer restrictions lapse and continuing until such time as
      IMS HEALTH no longer beneficially owns at least 10% of the outstanding
      shares of TriZetto common stock, measured as of the closing of the merger
      (unless at any time after the date of the stockholder agreement a
      transaction shall have occurred that results in a change in control of
      TriZetto), prior to the transfer, sale, assignment or other disposition of
      the beneficial ownership of a certain minimum percentage of TriZetto
      common stock, IMS HEALTH must first offer such shares to TriZetto. The
      provisions require that IMS HEALTH give prior written notice of such a
      transfer of shares to TriZetto, which notice shall constitute an
      irrevocable offer by IMS HEALTH to sell to TriZetto such shares on the
      proposed terms. TriZetto will then have the right to purchase all but not
      less than all of the shares.

    - RIGHT OF FIRST OFFER.  For a period of time commencing on the date that
      the share transfer restrictions lapse and continuing until such time as
      IMS HEALTH no longer beneficially owns at least 10% of the outstanding
      shares of TriZetto common stock, measured as of the closing of the merger
      (unless at any time after the date of the stockholder agreement a
      transaction shall have occurred that results in a change of control of
      TriZetto), prior to proposing a transfer, sale, assignment or other
      disposition of the beneficial ownership of any shares of TriZetto common
      stock, IMS HEALTH shall give TriZetto written notice of such transfer. For
      a period of time after such notice, IMS HEALTH and TriZetto shall discuss
      in good faith the possibility of effectuating a sale of such shares to
      TriZetto. If an agreement cannot be reached, IMS HEALTH may negotiate a
      transfer of shares to a third party at a price at least equal to the price
      offered by TriZetto

                                       59
<PAGE>
    - BOARD REPRESENTATION.  For so long as IMS HEALTH beneficially owns at
      least 10% of the outstanding shares of TriZetto, measured as of the
      closing of the merger, IMS HEALTH shall be entitled to designate one
      individual to be a Class II member of TriZetto's board of directors.
      TriZetto has agreed to use its best efforts to cause the election of the
      IMS HEALTH designated person to TriZetto's board of directors. IMS
      HEALTH's right to designate such an individual member to the board shall
      terminate and the current IMS HEALTH director shall resign in the event a
      transaction or a tender or exchange offer is consummated which involves
      any of the entities specified in the stockholder agreement and which
      results in the change of control of IMS HEALTH or the acquisition by IMS
      HEALTH of a majority interest in any of those designated entities.

    - MATTERS REQUIRING CONSENT OF IMS HEALTH.  TriZetto must obtain IMS
      HEALTH's prior written consent in connection with any merger,
      consolidation, purchase or sale of assets or equity interest, business
      combination or similar transaction, or any equity-based joint venture or
      similar transaction with specified competitors or potential competitors of
      IMS HEALTH. This consent, however, shall not be required if it is
      determined that the fiduciary duties of TriZetto's board of directors
      require TriZetto to enter into or consummate any such transaction.

    - STOCKHOLDER PROTECTION RIGHTS AGREEMENT.  TriZetto shall not (i) amend or
      supplement its stockholder protection rights agreement in any way which
      would adversely affect the rights of IMS HEALTH and the other entities
      specified in the merger agreement or (ii) adopt or implement any other
      stockholder protection rights agreement or any similar plan or arrangement
      unless such agreement, plan or arrangement is in no way less favorable to
      those specified entities than TriZetto's stockholder protection rights
      agreement.

                     MARKET PRICE AND DIVIDEND INFORMATION

HISTORICAL MARKET PRICE DATA

    TriZetto's common stock is listed on The Nasdaq Stock Market under the
symbol "TZIX." As of August 31, 2000, there were approximately       holders of
record of TriZetto common stock. The table below sets forth the high and low
sales prices per share of TriZetto common stock, as reported on The Nasdaq
National Market from October 9, 1999, the date of TriZetto's initial public
offering through August   , 2000, the last practicable trading day for which
information was available prior to the date of this proxy statement. All prices
are adjusted for applicable stock splits. There is no established public trading
market for Erisco's common stock.

<TABLE>
<CAPTION>
                                                                   TRIZETTO
                                                                 COMMON STOCK
                                                              -------------------
FISCAL QUARTER ENDED                                            HIGH       LOW
--------------------                                          --------   --------
<S>                                                           <C>        <C>
December 31, 1999...........................................   $48.25     $ 7.00
March 31, 2000..............................................   $91.25     $27.00
June 30, 2000...............................................   $35.75     $10.06
August   , 2000.............................................
</TABLE>

DIVIDEND INFORMATION

    Following the merger, the holders of TriZetto common stock will be entitled
to receive such dividends as may be declared by the board of directors of
TriZetto, if any. TriZetto has never paid cash dividends on its common stock.
TriZetto currently anticipates that it will retain earnings, if any, to support
operations and to finance the growth and development of its business and does
not anticipate paying cash dividends in the foreseeable future. The payment of
cash dividends by TriZetto is restricted by its current bank credit facilities,
which contain restrictions prohibiting TriZetto from paying any cash dividends
without the bank's prior approval.

                                       60
<PAGE>
                              BUSINESS OF TRIZETTO

COMPANY OVERVIEW

    TriZetto enables electronic business for the healthcare industry as a
software application services provider and with its healthcare Internet portal,
supported by its transformation services unit, which provides professional
consulting services. By combining hosted software applications with the
Internet, TriZetto provides a complete technology solution for its customers in
the healthcare industry. Customers primarily include healthcare provider groups,
physician practice management companies and managed care organizations such as
health maintenance organizations, preferred provider organizations and third
party administrators. By offering its software and services on a hosted basis,
TriZetto is able to provide its customers with comprehensive and cost
predictable services with guaranteed service quality, typically through
multi-year contracts. By supplying and managing the customers' information
technology environments, TriZetto eliminates their need to manage and support
their own computer systems, networks and software, thus allowing them to
concentrate on their primary business.

    TriZetto is a leading provider of remotely hosted third party packaged and
proprietary software applications and related services for use in the healthcare
industry. Through its Customer Connectivity Centers, TriZetto remotely operates
and maintains applications for its customers on most of the widely used
computing, networking and operating platforms. TriZetto provides access to its
hosted applications either across the Internet or across traditional networks.
TriZetto's proprietary solutions and methods enable its customers to access its
hosted applications using leading Internet browsers. TriZetto has acquired
rights to license and/or deploy numerous commercially available software
applications from a variety of healthcare software vendors, including, but not
limited to, Epic Systems, Inc., ERISCO Managed Care Technologies, Inc., Medic
Computer Systems, Inc., Medical Manager Corporation, Raintree Systems, Inc.,
InfoMedtrics, Inc., CTR Business Systems, Inc., McKesson HBOC, Inc., Penchart,
and QCSI.

    HealthWeb, TriZetto's branded healthcare business to business Internet
portal and its e-applications, is currently being used by providers and a number
of payors, and is designed to facilitate the exchange of information and to
enable e-commerce among all constituents of the healthcare industry. HealthWeb
is also designed to integrate and deliver the software applications that
TriZetto hosts for its customers though an easy-to-use common Internet browser
interface. TriZetto is promoting its HealthWeb brand in order to establish its
reputation as a leading healthcare e-commerce portal.

    HealthWeb is architected to specifically address the requirements of
individual users that TriZetto expects will include most types of healthcare
professionals and administrative staff. Currently, providers use HealthWeb for
day to day office administration activities, access to health plans and
communications with patients. Currently, payors use HealthWeb for information
exchange with providers and members. TriZetto is working on the development of
additional features and functionality that will be offered and deployed as
developed.

    TriZetto's Transformation Services Group helps TriZetto's customers become
more efficient in applying and using their information technology. TriZetto uses
its proprietary methodologies to identify information technology solutions that
are suitable for TriZetto's customers. In many cases, these solutions include
software applications hosted in TriZetto's Customer Connectivity Centers as well
as its HealthWeb portal and e-applications. The Transformation Services Group
implements selected solutions for which TriZetto provides ongoing application
services and support.

    TriZetto's senior management team averages approximately 14 years of
healthcare industry experience. In addition, many members of TriZetto's board of
directors and management team have been responsible for comprehensive execution
of information technology functions at leading healthcare entities representing
millions of covered-lives and thousands of physicians. TriZetto's comprehensive
understanding of healthcare business processes, and its experience in the use
and delivery of

                                       61
<PAGE>
information technologies, enables it to deliver reliable complex hosted software
applications and information technology services while maintaining customer
satisfaction.

    As of June 30, 2000, TriZetto served approximately 152 customers in over 360
sites located throughout the United States. These customers represent over 2,077
healthcare providers and make their services available to over 9.4 million
individuals.

TRIZETTO'S SOLUTIONS

    TriZetto's solutions are capable of providing its customers with a complete,
professionally managed information technology system that includes end-to-end
desktop and network connections, primary software applications that help run
their day-to-day business, and information access and reporting capabilities to
aid in data analysis and decision support. TriZetto's solutions allow its
customers to integrate different applications and technologies, manage risk and
control costs. TriZetto's solutions further enable its customers to take
advantage of the high speed, universal access and ease of use of the Internet.
TriZetto's products and services provide its customers with the following
benefits:

    - Rapid deployment and flexibility.

    - Reasonable, predictable costs.

    - Reliability and scalability.

    - Lower implementation risk.

    - Ease of communication and connectivity.

    - Internet access.

    - Preservation of existing investment in legacy systems.

    - Healthcare and managed care industry expertise.

TRIZETTO'S PRODUCTS AND SERVICES

APPLICATION SERVICES PROVIDER

    TriZetto's application services represent a subscription-based method for
customers to access all or any of the three required information technology
components (primary software applications, information access and reporting and
electronic communications infrastructure), along with supporting business
services. TriZetto's customers choose a combination of its product and service
offerings that best meet their business requirements, technical needs and
pricing requirements, and pay for the delivery of those services on a
subscription basis. TriZetto's software applications and information technology
services provide its customers with a simpler alternative as compared to the
creation and on-going operation of an in-house information technology function.
Customers may use TriZetto's applications and services for all or a portion of
their information technology and related business service needs.

    TriZetto expects to expand its product and service offerings as it continues
to develop relationships with additional software application vendors and
information technology service partners. The following chart depicts a sampling
of TriZetto's current software applications and services offered on an
application services basis, or in some cases pursuant to a license agreement,
classified by the primary information technology component that is being
delivered.

                                       62
<PAGE>
                               CURRENT OFFERINGS

<TABLE>
<CAPTION>
PRODUCT/VENDOR                                           KEY FUNCTIONS DELIVERED
--------------                         ------------------------------------------------------------
<S>                                    <C>
ELECTRONIC COMMUNICATIONS INFRASTRUCTURE
Access Manager.......................  A combination of hardware and software that allows the
                                       customer to access and use numerous software applications.

Internet Exchange....................  Provides an interface that effectively translates data from
                                       different software applications and enables them to
                                       communicate electronically.

HealthWeb Enablement.................  Provides the customer with an Internet browser-based overlay
                                       on software applications which gives the customer ease of
                                       use through point and click capabilities.
PRIMARY APPLICATIONS AND SERVICES
PROVIDER APPLICATIONS
Enterprise Manager...................  Software application that facilitates appointment
                                       scheduling, patient registration, visitation tracking,
                                       insurance processing, patient bill processing and includes a
                                       financial accounting module.

Epic (various).......................  Multiple software applications related to physician practice
                                       management and financial control, including scheduling,
                                       collection of co-payments, tracking of referrals and
                                       eligibility, billing and collections, medical records,
                                       claims adjudication, accounting and others.

+ Medic-TM-..........................  A practice management system that provides a solution for
                                       physicians and group practices. It includes software
                                       applications that automate and integrate financial,
                                       administrative, claims processing and electronic medical
                                       records functions.

Medical Manager......................  Fully integrated physician practice management solution
                                       which offers support for financial, administrative and
                                       clinical needs of physician groups and other providers.

Millbrook Paradigm-TM-...............  A practice management application used by both small and
                                       large physician practices for patient registration,
                                       scheduling, claims processing, billing, electronic claims
                                       filing, and utilization review.

The PenChart                           Application suite that provides medium and large ambulatory
System(-Registered Trademark-).......  care facilities with an electronic patient record, enabling
                                       rapid data entry by clinicians on hand-held wireless tablet
                                       computers, with documentation of all aspects of patient
                                       encounters, including patient visits, lab results, X-rays,
                                       consult notes and prescriptions.

Raintree Systems.....................  Software application that provides practice management
                                       solutions including appointment scheduling, registration,
                                       accounts receivable, management and reporting. Application
                                       is customizable according to provider's specialty.

StolaSystem(-Registered Trademark-)... A fully-integrated practice management application focusing
                                       on occupational medicine, featuring statistical tracking and
                                       integrating patient records, including specialist referral
                                       tracking, patient work status, state injury reports and
                                       tracking of patient visits.
PROVIDER BUSINESS SERVICES
Billing & Collections................  Through personnel located in its facilities, TriZetto
                                       performs billing and collection functions on an outsourced
                                       basis.

Claims Review........................  Through personnel located in its facilities, TriZetto
                                       reconciles capitation payments from insurance companies to
                                       medical groups and review claims paid for appropriateness
                                       and contract terms on an outsourced basis.
PAYOR APPLICATIONS
aQDEN-TM-............................  Software application that facilitates relationship
                                       management between the dental plan, its members, and the
                                       dental providers which manages every line of business in
                                       dental care. Features include member management, claims
                                       processing, referrals and more.

Epic                                   Software application that automates the fundamental
Tapestry(-Registered Trademark-).....  operations of managed care by providing the following
                                       capabilities: enrollment, eligibility, membership
                                       management, benefits tracking and inquiry, customer service,
                                       referral authorization, provider credentialing, case
                                       management and others.
</TABLE>

                                       63
<PAGE>

<TABLE>
<CAPTION>
PRODUCT/VENDOR                                           KEY FUNCTIONS DELIVERED
--------------                         ------------------------------------------------------------
<S>                                    <C>
ePlan(SM)............................  A web-enabling application for healthcare legacy systems. It
                                       streamlines and automates communications and transactions
                                       among health plans, participating providers and plan
                                       members, and facilitates e-commerce activities.

ERISCO                                 A comprehensive client/server solution for payor managed
Facets(-Registered Trademark-).......  care administration. It is comprised of modular applications
                                       designed to accommodate the key information and
                                       administration needs of managed care organizations including
                                       member and provider information management, claims
                                       management and data reporting.

HBOC Amisys(-Registered Trademark-)    A solution that addresses the information management needs
3000.................................  of payor- and provider-based organizations that have assumed
                                       the financial risk for delivery of healthcare services. This
                                       application automates the critical business functions
                                       necessary to operate or administer a variety of managed care
                                       products.

HBOC                                   A comprehensive auditing software system that automatically
ClaimCheck(-Registered Trademark-)...  edits and corrects billing errors to ensure claims are paid
                                       appropriately.

HBOC Code Review.....................  An auditing tool which detects, corrects and documents
                                       improper coding of claims by applying the American Medical
                                       Association's code criteria to all physician services.

Health Claims Processing System......  Software application that includes benefit plan
                                       administration, enrollment and eligibility, provider
                                       contracting, utilization/case management, claims processing,
                                       billing and accounts receivable, and customer service.

MedEVENT(-Registered Trademark-).....  System that supports provider or payor initiated medical
                                       management activities including: referral, utilization and
                                       case management, health management program tracking, health
                                       risk assessment, cost savings analysis, time tracking,
                                       quality improvement process, medical review tracking and
                                       production data aggregation and reporting.

MedMeasures..........................  Suite of applications that produce reports for all
                                       administrative measures included in the 2000 HEDIS
                                       specifications. Includes plan-specific setup, import and
                                       translation and data analysis support. Streamlines reporting
                                       and provides support for successful audit completion.

NCMS(-Registered Trademark-).........  A software application that manages the development,
                                       credentialing and ongoing maintenance of provider networks.
                                       Features automated credentialing processes, maintenance of
                                       expired documents, verification coding, provider templates,
                                       scoring, facility credentialing, provider profiles,
                                       delegated audit tracking and committee attendance and
                                       activity.

Plan Manager.........................  Software application that includes benefit plan
                                       administration, enrollment and eligibility, provider
                                       contracting, utilization/case management, claims processing,
                                       billing and accounts receivable, customer service,
                                       accounting and finance functions.

QMACS(-Registered Trademark-)........  Software application designed to administer all lines of
                                       medical business-Indemnity, PPO and HMO. It facilitates
                                       relationship management between the plan, its members, and
                                       the medical providers. This includes, but is not limited to,
                                       managing complex benefit plans and provider contracts,
                                       referrals, utilization management, claims adjudication and
                                       payment, call tracking and financial reporting.
ADMINISTRATIVE APPLICATIONS
CIO Workbench........................  A suite of applications that helps manage and prioritize
                                       information services projects.

Great Plains                           General accounting and financial package designed for small
eEnterprise(-Registered Trademark-)... to medium size businesses.

SAP..................................  General accounting and financial package designed for medium
                                       to large size businesses.
INFORMATION ACCESS & REPORTING
Data Manager.........................  A data warehousing program that collects and manages data
                                       from different sources.

InfoMedrics Healthcare Information
Center-TM-...........................  A data repository which merges all financial, clinical and
                                       administrative data across lines of insurance and risk.
                                       Facilitates the control of healthcare and disability costs,
                                       risks, contract agreements and potential liabilities.

MedSTOR(-Registered Trademark-)......  A data warehouse application which produces standardized and
                                       ad hoc reports that allow for in depth analysis of a
                                       client's business.
</TABLE>

                                       64
<PAGE>
HEALTHWEB INTERNET PORTAL

    HealthWeb, TriZetto's healthcare Internet portal and its e-applications, is
currently being used by providers and a number of payors. HealthWeb serves as a
gateway for the exchange of healthcare information and services across the
Internet. HealthWeb is designed to enhance single-point desktop access to a
variety of application and information resources required to run a healthcare
entity. HealthWeb is architecturally designed primarily for use by
administrative support personnel who conduct the day-to-day business and
clinical operations of healthcare entities. These personnel represent the vast
majority of employees in healthcare entities.

    After contracting with a new customer, members of TriZetto's Transformation
Services Group install HealthWeb on the user's computer desktop and customize it
per the user's specific requests. The user can choose to have HealthWeb as its
default screen that appears when the computer is turned on or if the user
continues using its own default screen, HealthWeb appears as an icon that will
be activated when the icon is pointed and clicked. Once activated, HealthWeb
provides the user with a single screen view of the software applications and
information needed to perform daily tasks.

    When using HealthWeb, the user sees various "point and click" choices on the
screen grouped under specific categories. For example, providers see categories
such as "Services," "Resources," "Facilities" and "Payors." Under "Services,"
the provider can click a button labeled "Practice Management System" which opens
software applications such as Epic or Medic, and allows the user to make
appointments, process claims or review other administrative data. Under
"Resources," the provider can click a button labeled "Medical Journals" which
would take the user to an Internet site containing medical information. Under
"Facilities," the provider can click a button labeled "Hospitals" which would
produce a list of the hospitals, including phone numbers or directions, which
can be distributed to a patient. Under "Payors," the user can click a button
that contains the names of insurance carriers. This would link the provider to
the insurance carrier's systems over the Internet, which would allow the
provider to verify eligibility, benefits, referrals, claim status and other
information, as well as messaging with the health plan.

    HealthWeb is designed to work with legacy healthcare applications which do
not have "point and click" view screens. TriZetto provides its users "point and
click" connection to software applications, whether they operate on new or
legacy platforms, using any standard Internet browser. TriZetto believes that
the abandonment of legacy systems will generally not serve the best interests of
its customers, especially in light of significant capital outlays customers have
recently made in addressing the Year 2000 issues. HealthWeb's proprietary
enabling technology to access and connect to these legacy systems allows
TriZetto to maximize value to its customers while minimizing risks of business
interruption.

    HealthWeb also allows customers unlimited Internet access to other
healthcare trading partners such as pharmacy and supply companies, to other
healthcare entities, to online healthcare data and information content services,
to healthcare organizations and associations, to education and training
resources and to individuals.

    For those customers who utilize TriZetto's software applications and
information technology services, HealthWeb is designed to be the primary access
method to receive those services. For customers who do not utilize TriZetto's
applications and services, HealthWeb is designed to co-exist with their existing
software applications and technology environments.

    TriZetto plans that the number of offerings available through its HealthWeb
healthcare Internet portal will grow, as it continues to develop relationships
with additional Internet-capable service and content partners.

                                       65
<PAGE>
TRANSFORMATION SERVICES GROUP

    TriZetto's Transformation Services Group consists of approximately 90
individuals who are available to communicate with TriZetto's customers on a
daily basis to ensure that its customers' information technology systems
correspond with their strategic business objectives. TriZetto's professional
services personnel consult with customers from TriZetto's office or work
directly with them at their own facilities. TriZetto's non-recurring engagements
may range from several days to many months. TriZetto's services are either
billed on a time and materials basis or upon a fixed rate negotiated for a
specific project.

    TriZetto hires and develops professional services personnel from across the
nation to provide non-recurring services to its customers in the major
population centers of the United States, as well as to ensure that TriZetto has
expertise in each of the major segments of the healthcare industry. TriZetto
anticipates that the number of professional services personnel that its employs,
and the number of geographic office locations that it maintains will continue to
grow as it expands its Transformation Services Group.

    Since TriZetto actively recruits qualified information technology
professionals from the healthcare industry, its professional services personnel
provide a depth of knowledge and experience specifically focused to address its
customers' business and technology needs. The following chart describes the
types of professional services TriZetto provides.

                            TRANSFORMATION SERVICES

<TABLE>
<CAPTION>
TYPE                                                           DESCRIPTION
----                                   ------------------------------------------------------------
<S>                                    <C>
INFORMATION TECHNOLOGY ASSESSMENT AND
STRATEGY SERVICES....................  TriZetto helps customers effectively use information
                                       technology by analyzing their business strategies, technical
                                       competence, business management processes and abilities to
                                       support existing information technology. Based upon the
                                       results of its analysis, TriZetto helps its clients
                                       understand their existing level of information technology
                                       capability and provide direction to help them achieve
                                       competitive advantage by managing their information and data
                                       electronically.

VIO(SM)--VIRTUAL INFORMATION OFFICER
SERVICES.............................  TriZetto provides executive-level information technology
                                       professionals for its customers who either do not employ
                                       their own information technology management or wish to
                                       supplement it. Drawing upon its consultants' considerable
                                       experience and depth of knowledge, TriZetto provides
                                       information technology management services with a greater
                                       breadth of expertise than its customers can achieve using
                                       their own management resources. These services include the
                                       use of TriZetto's CIO Workbench(SM) products, a collection
                                       of its proven information technology management tools and
                                       techniques.

INTEGRATION CONSULTING SERVICES......  TriZetto helps its customers install and implement software
                                       applications and technology products. Based upon years of
                                       project experience, TriZetto provides integration
                                       non-recurring services that include systems planning,
                                       analysis, selection, design, construction, implementation,
                                       data conversion, testing, business process development,
                                       training development and delivery and systems support. This
                                       helps TriZetto's customers succeed in implementing difficult
                                       systems projects.

STAFFING SERVICES....................  TriZetto provides temporary staffing for customers who lack
                                       qualified information technology personnel. By utilizing
                                       both TriZetto's own professional services personnel and a
                                       national network of contracted, technical specialists,
                                       TriZetto provides access to specialized technical personnel
                                       on both short-term and long-term basis. Personnel placement
                                       services are also available through a variety of fee
                                       arrangements.

E-COMMERCE SOLUTIONS SERVICES........  TriZetto assists its customers in developing, deploying and
                                       maintaining customized e-commerce applications. Services
                                       include systems planning, analysis, design, construction,
                                       implementation, data conversion, testing, business process
                                       development, training development and delivery and systems
                                       support.
</TABLE>

                                       66
<PAGE>
SALES AND MARKETING

    TriZetto takes a consultative approach to selling its services. TriZetto's
Transformation Services Group, consisting of approximately 90 members, is
trained in a proprietary assessment methodology that allows them to quickly and
comprehensively analyze the customers' information technology capabilities and
requirements. In conjunction with their consulting responsibilities, TriZetto's
Transformation Services Group identifies opportunities to introduce its
customers to the broad range of applications and technology solutions available
to them. In many cases, these will include applications hosted in TriZetto's
Customer Connectivity Centers as well as HealthWeb and Internet Exchange.

    TriZetto's 17 person professional sales force, which is led by a veteran
healthcare executive, uses traditional marketing, lead generation and customer
qualification techniques to directly sell its hosted products and services to
prospective and existing customers. This sales force concentrates specifically
on solutions for provider and payor organizations. TriZetto's marketing and
business development organization focuses on building its corporate brands,
including its software applications and information technology services and its
healthcare Internet portal. This organization is also responsible for developing
and refining TriZetto's business strategies. In addition, TriZetto's marketing
and business development organization is responsible for the following programs:

    - LEAD GENERATION PROGRAM. This program identifies and qualifies prospective
      customers through seminars, telemarketing, audio and web casting, direct
      mail and annual conferences.

    - INDUSTRY MARKETING AND BRAND DEVELOPMENT PROGRAM. This program includes
      participation in and sponsorship of industry tradeshows and trade media
      advertising.

    - STRATEGIC BUSINESS ALLIANCES PROGRAM. This program initiates and develops
      strategic partnerships to implement co-branding, cooperative marketing and
      distribution relationships.

CUSTOMER SERVICE

    TriZetto believes that a high level of support is necessary to maintain
long-term relationships with its customers. TriZetto's service desk staff
provides a wide range of customer support functions. TriZetto's customers may
contact the service desk via a toll-free number 24 hours a day, seven days a
week. The account manager assigned to each of TriZetto's customers is
responsible for proactively monitoring customer satisfaction, exposing customers
to additional training and process-improvement opportunities and coordinating
issue resolution. TriZetto employs functional and technical support personnel
who work directly with its account management team and customers to resolve
technical, operational and application problems or questions.

    Because TriZetto supports multiple applications and technology solutions,
its functional and technical support staff are grouped and trained by specific
application and by application type. These focused staff groups have
concentrated expertise that TriZetto can deploy as needed to address customer
needs. TriZetto cross-trains employees to support multiple application solutions
to create economies-of-scale in its support staff. TriZetto further leverages
the capabilities of its support staff through the use of sophisticated computer
software that keeps track of solutions to common computer and software-related
problems. This allows TriZetto's support staff to learn from the experience of
other people within the organization and it reduces the time it takes to solve
problems. TriZetto has implemented Remedy, a third party software application
for tracking the status, and subsequent resolution, of problems that have been
reported to its help desk. This allows TriZetto to cost-effectively distribute
its knowledge base of application problem resolutions to employees and
customers. All changes to computer software are coordinated centrally and new
versions of software, containing updates and enhancements are released on a
regular basis with strict testing and controls. This ensures that the new
software functions correctly in the customer's environment. As of June 30, 2000,
TriZetto

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<PAGE>
had approximately 225 employees and independent contractors providing technical
support functions for its customers.

    In addition, TriZetto provides business services support for its customers
in the areas of claims processing, billing and enrollment, membership services,
provider contracting and provider credential verification services. As of
June 30, 2000, TriZetto had approximately 180 employees and independent
contractors providing such support services.

VENDOR PARTNER RELATIONSHIPS

    TriZetto maintains relationships with a large and increasing number of
software vendors in the healthcare information technology market. These
relationships range from perpetual, reusable software licenses and contracts to
preferred installer agreements to informal co-marketing arrangements. TriZetto
entered into relationships with software vendors in order to be able to offer
its customers the widest possible variety of solutions tailored to their unique
information technology needs. TriZetto's relationships with its vendor partners
are designed to provide both parties with numerous mutual benefits.

    The benefits for TriZetto's vendor partners include:

    - web-enablement of their products;

    - professional installation and operation of their products;

    - ease of integration with other third party products and services;

    - easier software version control;

    - easier add-on product capability;

    - lower implementation risk;

    - enhanced distribution channels;

    - shorter sales cycle;

    - lower maintenance and support costs; and

    - potentially higher margins.

    The benefits for TriZetto include:

    - access to market leading products and technology solutions;

    - ability to focus on service delivery rather than software development;

    - co-marketing with industry leading brands;

    - enhanced distribution channels; and

    - competitive pricing.

    TriZetto is committed to delivering cost-predictable proven solutions to its
customers. TriZetto evaluates and recommends applications or technologies that
most closely match the business requirements, technical needs and price
requirements of its customers. TriZetto is capable of hosting the leading
commercially available healthcare applications on a broad range of operating
platforms, and is able to deploy these applications as required by its
customers. Some of TriZetto's healthcare vendor partners include:

    - ERISCO Managed Care Technologies, Inc.

    - Epic Systems, Inc.;

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<PAGE>
    - Medic Computer Systems, Inc.;

    - Quality Care Solutions, Inc.;

    - Raintree Systems, Inc.;

    - CTR Business Systems, Inc.;

    - InfoMedtrics, Inc.; and

    - McKesson HBOC, Inc.

COMPETITION

    The market for healthcare information services is intensely competitive,
rapidly evolving, highly fragmented and subject to rapid technological change.
By using proprietary technologies and methodologies, TriZetto integrates and
delivers packaged software applications, Internet connections, electronic
communication infrastructure and information technology consulting services.
TriZetto's competitors provide some or all of the services that it provides. The
competitors can be categorized as follows:

    - application services providers, such as USinternetworking, Inc. and Exodus
      Communications, Inc.;

    - healthcare e-commerce and portal companies, such as Healtheon/WebMD
      Corporation and CareInsite, Inc.;

    - information technology outsourcing companies, such as Perot Systems
      Corporation, Computer Sciences Corporation and Electronic Data Systems
      Corporation;

    - information technology consulting firms, such as Superior Consultant
      Holdings Corporation, First Consulting Group, Inc. and the consulting
      divisions of the major accounting firms; and

    - healthcare information software vendors selling products, such as IDX
      Systems Corporation, McKesson HBOC, Inc., and Cerner Corporation.

    Each of these types of companies can be expected to compete with TriZetto
within various segments of the healthcare information technology market.
Furthermore, major software information systems companies and other entities,
including those specializing in the healthcare industry that are not presently
offering applications that compete with TriZetto's products and services, may
enter TriZetto's markets. In addition, some of TriZetto's third party software
vendors with whom it has licensing agreements may compete with it from time to
time by selling software on a stand-alone basis.

    TriZetto believes companies in its industry primarily compete based on
performance, price, software functionality, customer awareness, ease of
implementation and level of service. Although TriZetto's position in the market
as compared to its competitors is difficult to characterize due principally to
the variety of current and potential competitors and the evolving nature of its
market, TriZetto believes that it presently competes favorably with respect to
all of these factors. While its competition comes from many industry segments,
TriZetto believes no single segment offers the integrated, single-source
solution that TriZetto provides to its customers.

    To be competitive, TriZetto must continue to enhance its products and
services, as well as TriZetto's sales, marketing and distribution channels to
respond promptly and effectively to:

    - changes in the healthcare industry;

    - constantly evolving standards affecting healthcare transactions;

    - the challenges of technological innovation and adoption;

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<PAGE>
    - evolving business practices of TriZetto's customers;

    - TriZetto's competitors' new products and services;

    - new products and services developed by TriZetto's vendor partners and
      suppliers; and

    - challenges in hiring and retaining information technology professionals.

INTELLECTUAL PROPERTY

    TriZetto's intellectual property is important to its business. TriZetto
relies on certain developed software assets and internal methodologies for
performing customer services. TriZetto's Transformation Services Group develops
and utilizes information technology life-cycle methodology and related paper-
based and software-based toolsets to perform customer assessments, planning,
design, development, implementation and support services. TriZetto relies on a
combination of copyright, trademark and trade secret laws, confidentiality
procedures and contractual provisions to protect its intellectual property.
TriZetto has no patented technology.

    TriZetto's efforts to protect its intellectual property may not be adequate.
TriZetto's competitors may independently develop similar technology or duplicate
its products or services. Unauthorized parties may infringe upon or
misappropriate TriZetto's products, services or proprietary information. In
addition, the laws of some foreign countries do not protect proprietary rights
as well as the laws of the United States. In the future, litigation may be
necessary to enforce TriZetto's intellectual property rights or to determine the
validity and scope of the proprietary rights of others. Any such litigation
could be time-consuming and costly.

    TriZetto could be subject to intellectual property infringement claims as it
expands its product and service offerings and the number of TriZetto's
competitors increases. Defending against these claims, even if not meritorious,
could be expensive and divert TriZetto's attention from operating its company.
If TriZetto becomes liable to third parties for infringing upon their
intellectual property rights, TriZetto could be required to pay a substantial
damage award and be forced to develop noninfringing technology, obtain a license
or cease using the applications that contain the infringing technology or
content. TriZetto may be unable to develop noninfringing technology or content
or obtain a license on commercially reasonable terms, or at all.

    TriZetto also relies on a variety of technologies that are licensed from
third parties to perform key functions. These third party licenses are an
essential element of TriZetto's business as an application services provider.
These third party licenses may not be available to TriZetto on commercially
reasonable terms in the future. The loss of or inability to maintain any of
these licenses could delay the introduction of software enhancements and other
features until equivalent technology can be licensed or developed. Any such
delay could materially adversely affect TriZetto's ability to attract and retain
customers.

TECHNOLOGY

    TriZetto operates Customer Connectivity Centers in Englewood, Colorado,
Birmingham, Alabama, and Albany, New York. Each center operates with
state-of-the-art environmental protection systems to maintain high availability
to host systems and wide area network access. Connection to TriZetto's host
application servers and services is provided using the industry-standard TCP/IP
protocol. TriZetto believes this provides the most efficient and cost-effective
transport for information systems services, as well as simplified support and
management. TriZetto's network connectivity infrastructure eliminates its
customers' need to manage and support their own computer systems, network and
software. TriZetto provides active management for all infrastructure components
and server platforms from its Customer Connectivity Center in Englewood,
Colorado.

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<PAGE>
GOVERNMENT REGULATION

    INTERNET REGULATION.  There are increasing numbers of laws and regulations
pertaining to the Internet. In addition, a number of legislative and regulatory
proposals are under consideration by federal, state, local and foreign
governments and agencies. Laws or regulations may be adopted with respect to the
Internet relating to liability for information retrieved from or transmitted
over the Internet, on-line content regulation, user privacy, taxation and
quality of products and services. Moreover, it may take years to determine
whether and how existing laws such as those governing issues such as
intellectual property ownership and infringement, privacy, libel, copyright,
trademark, trade secret, obscenity, personal privacy, taxation, regulation of
professional services, regulation of medical devices and the regulation of the
sale of other specified goods and services apply to the Internet and Internet
advertising. The requirement that TriZetto comply with any new legislation or
regulation, or any unanticipated application or interpretation of existing laws,
may decrease the growth in the use of the Internet, which could in turn decrease
the demand for TriZetto's service, increase its cost of doing business or
otherwise have a material adverse effect on its business, results of operations
and financial condition.

    INTERNET TAXATION.  A number of legislative proposals have been made at the
federal, state and local level, and by foreign governments, that would impose
additional taxes on the sale of goods and services over the Internet and certain
states have taken measures to tax Internet-related activities. Although in
October 1998 Congress placed a three-year moratorium on state and local taxes on
Internet access or on discriminatory taxes on electronic commerce, existing
state or local laws were expressly excepted from this moratorium. Once this
moratorium is lifted, some type of federal and/or state taxes may be imposed
upon Internet commerce. Such legislation or other attempts at regulating
commerce over the Internet may substantially impair the growth of commerce on
the Internet and, as a result, adversely affect TriZetto's opportunity to derive
financial benefit from such activities.

    PRIVACY CONCERNS.  The confidentiality of patient records and the
circumstances under which records may be released for inclusion in the databases
TriZetto hosts are subject to substantial regulation by state governments. These
state laws and regulations govern both the disclosure and the use of
confidential patient medical record information. Although compliance with these
laws and regulations is at present principally the responsibility of the
hospital, physician or other healthcare provider, regulations governing patient
confidentiality rights are evolving rapidly. Additional legislation governing
the dissemination of medical record information has been proposed at both the
state and federal level. This legislation may require holders of this
information to implement security measures that may require substantial
expenditures by TriZetto. For example, the proposed Health Information
Modernization and Security Act would establish standards and requirements for
the electronic transmission of health information. There can be no assurance
that changes to state or federal laws will not materially restrict the ability
of healthcare providers to submit information from patient records using
TriZetto's applications.

    FEDERAL AND STATE HEALTHCARE REGULATION.  TriZetto's software applications,
information technology services and healthcare Internet portal are designed to
function within the current healthcare financing and reimbursement system.
During the past several years, the healthcare industry has been subject to
increasing levels of government regulation of, among other things, reimbursement
rates and certain capital expenditures. In addition, proposals to reform the
healthcare system have been considered by Congress. These proposals, if enacted,
may further increase government involvement in healthcare, lower reimbursement
rates and otherwise change the operating environment for TriZetto's customers.
As in the past, healthcare organizations may react to these proposals and the
uncertainty surrounding such proposals in ways that could result in a reduction
or deferral in the use of TriZetto's technologies and services. TriZetto cannot
predict with any certainty what impact, if any, such proposals or healthcare
reforms might have on its business, financial condition or results of
operations.

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<PAGE>
    TriZetto performs billing and claims services that are governed by numerous
federal and state civil and criminal laws. The federal government in recent
years has placed increased scrutiny on billing and collection practices of
healthcare providers and related entities and particularly on potential
fraudulent billing practices such as submissions of inflated claims for payment
and upcoding. Violations of the laws regarding billing and coding may lead to
civil monetary penalties, criminal fines, imprisonment or exclusion from
participation in Medicare, Medicaid and other federally funded healthcare
programs for TriZetto and its customers. Any of these results could have a
material adverse impact on TriZetto's business, financial condition or results
of operations.

    Legislation currently being considered at the federal level could impact the
manner in which TriZetto conducts its business. The Health Insurance
Portability & Accountability Act (HIPAA) of 1996 mandates the use of standard
transaction formats, codes sets, identifiers and privacy and security
requirements. Publication of transaction standards were scheduled for June 2000
and compliance will be required by August 2002. Other regulations will be
published in stages after June 2000.

    TriZetto must deliver HIPAA-compliant systems and its clients must be
responsible for their overall HIPAA compliance. TriZetto's ability to provide
HIPAA-compliant applications to its customers through the ASP model could
relieve customers of significant application remediation requirements. This
potentially represents a significant competitive advantage. Conversely, any
failure to become HIPAA-compliant could negatively impact TriZetto's competitive
advantage and involve financial and/or criminal penalties.

    CONSUMER PROTECTION LAWS.  In addition, federal and state consumer
protection laws may apply to TriZetto when it bills patients directly for the
cost of physician services provided. Failure to comply with any of these laws or
regulations could result in a loss of licensure, or other fines and penalties.
Any of these results could have a material adverse impact on TriZetto's
business, financial condition or results of operations.

PROPERTIES

    As of June 30, 2000, TriZetto leased 15 facilities, all located within the
United States. TriZetto's principal executive and corporate offices are located
in Newport Beach, California. TriZetto's Customer Connectivity Centers are
located in Englewood, Colorado, Birmingham, Alabama and Albany, New York and
TriZetto's billing service centers are located in Shelton, Nebraska, Louisville,
Kentucky and Cohoes, New York. TriZetto also has offices for support staff,
development and network operations in Englewood, Colorado, Provo, Utah,
Moorestown, New Jersey, Glastonbury, Connecticut, Irving, Texas, Elmwood, New
Jersey, Costa Mesa, California, Baltimore, Maryland and Albany, New York.
TriZetto also maintains sales offices in New York, New York, and Atlanta,
Georgia. TriZetto's leases have expiration dates ranging from 2000 to 2006.
TriZetto believes that its facilities are adequate for its current operations
and that additional leased space can be obtained if needed.

LEGAL PROCEEDINGS

    From time to time, TriZetto may be involved in litigation relating to claims
arising out of its operations in the normal course of business. As of the date
of this proxy statement, TriZetto is not a party to any legal proceedings, the
adverse outcome of which, in management's opinion, individually or in the
aggregate, would have a material adverse effect on TriZetto's results of
operations or financial position.

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<PAGE>
                               BUSINESS OF ERISCO

    ERISCO Managed Care Technologies, Inc. has been a leading provider of
information technology solutions for healthcare payor organizations for more
than 20 years. Today, Erisco systems are used by over 125 payor organizations
serving over 70 million lives. Erisco continues to enhance its market position
by integrating advanced technology and clinical information with enterprise-wide
business applications and the Internet.

    Erisco was founded in 1968 as a data processing company, and evolved into an
applications software vendor focused on group healthcare applications. During
the 1970s and 1980s, Erisco became the leading provider of indemnity group
health/claims management software systems. In the mid-to-late 1980s, Erisco
migrated with indemnity carriers to managed care functionality. In 1984, Erisco
was acquired by The Dun & Bradstreet Corporation. In the 1990s, Erisco
reorganized to focus exclusively on healthcare payor organizations and invested
heavily in managed care application and client/server technology. In 1993,
Erisco launched Facets-Registered Trademark-, the industry's first true
client/server system. In the mid 1990s, Dun & Bradstreet was separated into
three distinct companies and Erisco was placed under the Cognizant Corporation.
In 1996, Cognizant was spun off into two companies. As a result of the spin-off,
Erisco became part of IMS HEALTH, the world's leading provider of information
solutions to the pharmaceutical and healthcare industries.

    Erisco is headquartered in New York City and has a staff of over 300
employees located in its New York City and Union, New Jersey offices. These
employees consist of professionals who possess systems, operations and
healthcare experience. Erisco has a reputation for strength and stability.
Erisco's management team has an average of 14 years experience in healthcare and
its employee turnover rate is currently less than five percent.

    Erisco's legacy-based managed indemnity product line, which consists of
GroupFacts-TM- and ClaimFacts-TM-, provides high-volume, reliable and
cost-effective claims processing and group life/health administration for
indemnity insurance carriers, third party administrators, and self-administered
corporations. GroupFacts and ClaimFacts systems are used today by more than 80
companies serving over 40 million lives.

    GroupFacts is a comprehensive on-line system that administers all functions
of the traditional group indemnity business as well as supporting the managed
care options of HMOs and PPOs. It handles enrollments, calculates premiums,
performs billing, handles remittances, computes commissions, and supports
re-insurance and carrier reporting. Special on-line features include automatic
transaction processing, copying records to speed mass transactions and easy
inquiry capabilities with generic search. GroupFacts supports the
administration, marketing, actuarial requirements, underwriting and accounting
of group life and health insurance through an integrated database and management
reporting system. The GroupFacts system handles all types of businesses,
including true group, multiple employee trust, administrative services
organizations (ASO), group association, alternate funding plans,
self-administration, individual and ASO/combined billing.

    ClaimFacts is an on-line health claims management system for medical,
dental, disability and triple option plans. System features include: eligibility
verification, duplicate search, claims benefit determination, coordination of
benefits checking, payment computation, automatic claims adjudication,
single-screen processing, on-line file maintenance and automated correspondence.
Additional modules handle electronic claim submission, referral processing and
provide links to review vendor records.

    In 1993, Erisco introduced Facets, a contemporary, fully integrated managed
care system solution. Today, Facets is the industry's most production-proven,
scalable client/server solution for payer managed care administration. Facets
has a customer base of more than 45 managed care organizations serving over
30 million lives.

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<PAGE>
    Facets is an integrated healthcare management system designed to handle the
complex requirements of managed care programs. The modular design of Facets
allows managed care organizations to select from a variety of components to meet
specific business requirements--including claims processing, claims pre-pricing,
capitation/risk fund accounting, premium billing, provider network management,
group/membership administration, referral management, hospital and medical
pre-authorization, case management, customer service and electronic commerce.

    Erisco's Managed Care Enterprise Strategy-TM- offers a comprehensive
solution to the managed care marketplace. Erisco has extended its Facets core
administrative system with companion solutions for physician credentialing,
document imaging, workflow management, data warehousing, decision support,
provider profiling, and Healthplan Employer Data Information Set reporting. This
strategy demonstrates Erisco's ability to leverage the open client/server
platform of Facets through business alliance relationships and system
interoperability with critical complimentary applications required by managed
care organizations.

    Erisco also extends its Facets business solution through a service bureau
offering for low-volume customers and through alliances with strategic business
partners for systems integration and implementation consulting.

    The next-generation Facets solution leverages Internet technologies and
thin-client, n-tiered architecture to continue to deliver the industry's most
advanced solution for HMOs, PPOs, Blue Cross Blue Shield organizations, and
specialty managed care organizations.

    With over 125 customers and 70 million covered lives, Erisco attributes its
success in the marketplace to both the quality of its systems and the level of
customer support provided at each phase of the implementation process.

    Erisco's success in the marketplace is a reflection of both the quality of
its systems and the level of customer support it provides at each phase of
implementation and on an on-going basis for plan processing. Over the next three
to five years, the corporate commitment is to focus on the managed health care
industry and the information processing needs of managed care payor
organizations.

    It is expected that Erisco's strategic growth will come from Facets sales to
the managed care marketplace. Ongoing change in healthcare has had a significant
impact on this market segment, resulting in the migration of plan members from
indemnity-oriented plans to managed care. Federal regulations from the Health
Insurance Portability and Accountability Act and rapid implementation of
strategic e-business initiatives utilizing the Internet are heightening the
demand for new administrative systems built on contemporary client/server
architecture. It is expected that these market factors combined with the
limitation of aging information systems will continue to increase the demand for
sophisticated managed care applications.

   AMENDMENT TO TRIZETTO'S AMENDED AND RESTATED CERTIFICATE OF INCORPORATION

PROPOSED AMENDMENT

    TriZetto's board of directors has adopted, subject to stockholder approval,
an amendment to TriZetto's Amended and Restated Certificate of Incorporation to
increase the number of authorized shares of TriZetto common stock from
45,000,000 shares to 100,000,000 shares, consisting of 5,000,000 shares of
undesignated preferred stock and 95,000,000 shares of common stock.

DESCRIPTION OF AMENDMENT

    TriZetto's reserve of authorized but unissued shares of common stock has
been reduced in the last two fiscal years as a result of a number of business
combinations in which TriZetto issued shares of

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common stock as consideration, and grants of stock options under TriZetto's 1998
Stock Option Plan. As of the close of business on the record date,
shares of TriZetto common stock were issued and outstanding,             shares
of common stock were reserved for issuance under the TriZetto 1998 Stock Option
Plan and no shares of Preferred Stock were outstanding. As of the date of this
proxy statement, TriZetto estimates that it will issue between 8,793,103 and
12,142,857 shares of common stock to IMS HEALTH, as sole stockholder of Erisco,
pursuant to the merger. Although there are a sufficient number of shares of
TriZetto common stock available to complete the merger prior to the proposed
amendment, the issuance of shares of TriZetto common stock to IMS HEALTH in
connection with the merger would reduce TriZetto's reserve of authorized but
unissued shares of common stock.

    If this amendment proposal is approved by the TriZetto stockholders at the
special meeting, TriZetto will have additional shares of common stock available
for issuance from time to time for such purposes and consideration as TriZetto's
board of directors may approve. Such purposes may include additional public or
private sales of common stock in financing transactions, acquisitions of other
businesses or other corporate purposes, as well as stock dividends, stock option
plans and other stock-based incentive or compensation programs. No further vote
of stockholders of TriZetto will be required to issue such shares of common
stock, except as required by law or stock exchange regulations. Accordingly, the
availability of additional shares of common stock for issuance, without the
delay and expense of obtaining stockholder approval, will afford TriZetto
greater flexibility in acting upon opportunities and transactions, if any, which
may arise in the future. Except for the merger and the other transactions
contemplated by the merger agreement, TriZetto has no immediate agreements,
commitments or understandings with respect to the issuance of any of the
additional shares of common stock which would be authorized by the proposed
amendment to the TriZetto Amended and Restated Certificate of Incorporation.

    At the present time, TriZetto is not aware of any pending or threatened
efforts by any third party to obtain control of TriZetto, and this amendment
proposal is not being made in response to any such efforts. However, the
availability for issuance of additional shares of common stock could enable
TriZetto's board of directors to make more difficult or discourage an attempt to
obtain control of TriZetto. For example, the issuance of shares of common stock
in a public or private sale, merger or similar transaction would increase the
number of outstanding shares, thereby diluting the interest of a party
attempting to obtain control of TriZetto.

    If the issuance of shares to IMS HEALTH is approved, but the amendment to
TriZetto's Amended and Restated Certificate of Incorporation is not approved by
TriZetto's stockholders, TriZetto would be able to issue a sufficient number of
shares of TriZetto common stock to consummate the merger of its wholly owned
subsidiary with Erisco.

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<PAGE>
         SECURITY OWNERSHIP OF MANAGEMENT AND CERTAIN BENEFICIAL OWNERS

    Set forth below is certain information as of June 30, 2000 regarding the
beneficial ownership of TriZetto common stock by (i) any person who was known by
TriZetto to own more than five percent of TriZetto voting securities, (ii) all
directors, (iii) each of the Named Executive Officers identified in the Summary
Compensation Table or TriZetto's Form 10-K dated March 30, 2000, and (iv) all
current directors and executive officers as a group. Also set forth below is the
percentage of outstanding shares beneficially owned after consummation of the
merger, assuming             shares of TriZetto common stock are issued in
connection with the merger.

<TABLE>
<CAPTION>
                                                               AMOUNT AND NATURE OF                     % OF CLASS
NAME AND ADDRESS OF BENEFICIAL OWNERS(1)                      BENEFICIAL OWNERSHIP(2)   % OF CLASS   AFTER THE MERGER
----------------------------------------                      -----------------------   ----------   ----------------
<S>                                                           <C>                       <C>          <C>
Raymond D. Croghan(3) ......................................         3,042,681                 14%
  275 South Main St., Ste. 105
  Longmont, CO 80501........................................
Delphi Ventures IV, L.P.....................................         2,736,014                 13%
Delphi BioInvestments IV, L.P. .............................
  3000 Sand Hill Road
  Building One, Suite 135
  Menlo Park, CA 94025
Fidelity Ventures Limited ..................................         1,289,336                  6%
  82 Devonshire St., R25C
  Boston, MA 02109-3614
Fidelity Investors Limited Partnership......................         1,289,336                  6%
Fidelity Investors II Limited Partnership ..................
  82 Devonshire St., R25C
  Boston, MA 02109-3614
Jeffrey H. Margolis(4)......................................         2,732,000                 13%
Donald J. Lothrop(5)........................................         2,736,014                 13%
Peter D. Mann(6)............................................                 0                  0%
William E. Fisher(7)........................................           422,595                  2%
Paul F. LeFort(8)...........................................            60,000                < 1%
Daniel J. Spirek(9).........................................           330,000                  2%
Michael J. Sunderland.......................................            38,036                < 1%
Kerry M. Kearns(10).........................................            42,500                < 1%
Shawn Bowen(11).............................................           253,375                  1%
All executive officers and directors as a group (17                  7,282,799                 34%
  persons)(12)..............................................
</TABLE>

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

(1) Unless otherwise indicated, the business address of such stockholder is c/o
    The TriZetto Group, Inc., 567 San Nicolas Drive, Suite 360, Newport Beach,
    California 92660.

(2) Beneficial ownership is determined in accordance with the rules of the
    Securities and Exchange Commission and generally includes voting or
    investment power with respect to securities. Shares of common stock subject
    to options, warrants and convertible notes currently exercisable or
    convertible, or exercisable or convertible within 60 days of June 30, 2000,
    are deemed outstanding for computing the percentage of the person holding
    such options but are not deemed outstanding for computing the percentage of
    any other person. Except as indicated by footnote, and subject to community
    property laws where applicable, the persons named in the table have sole
    voting and investment power with respect to all shares of common stock shown
    as beneficially owned by them.

(3) 550,000 of these shares are subject to an option granted by Mr. Croghan to
    Mr. Margolis, with a term of five years and an exercise price of $6.50 per
    share.

(4) 1,757,000 shares are held by Jeffrey H. Margolis and his wife, in their
    capacities as trustees of the Margolis Family Trust, over which the trustees
    have shared voting power. 300,000 shares are held in two additional trusts
    over which Mr. Margolis has sole voting power and Mr. Margolis disclaims
    beneficial ownership in 150,000 of such shares. Includes options for 550,000
    shares of common stock granted by Mr. Croghan to Mr. Margolis, which are
    immediately exercisable. Also includes Mr. Margolis' options for 100,000
    shares of common stock, which are exercisable within 60 days of April 30,
    2000.

(5) Consists of 2,736,014 shares held by Delphi Ventures IV, L.P. and Delphi
    BioInvestments IV, L.P. Mr. Lothrop is a Managing Member of Delphi
    Management Partners IV, LLC, the general partner of Delphi Ventures IV, L.P.
    and Delphi

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<PAGE>
    BioInvestments IV, L.P., and disclaims beneficial ownership of the 2,736,014
    shares except to the extent of his pecuniary interest. Mr. Lothrop's
    business address is the same as that of Delphi.

(6) Mr. Mann has previously reported and disclaimed beneficial ownership of
    1,289,336 shares held by Fidelity Ventures Limited in connection with his
    position as Vice President of the general partner of Fidelity Ventures. As
    of April 2000, Mr. Mann no longer holds any position with any Fidelity
    entity and is no longer required to report such shares.

(7) Includes options for 10,000 shares of common stock which are exercisable
    within 60 days of June 30, 2000. Also includes 162,595 shares of common
    stock held by KFS Management, Inc. Mr. Fisher owns 50% of the issued and
    outstanding stock of KFS and is an officer and director of KFS.

(8) Includes options for 10,000 shares of common stock, which are exercisable
    within 60 days of June 30, 2000.

(9) Includes options for 5,000 shares of common stock, which are exercisable
    within 60 days of June 30, 2000.

(10) Includes options for 7,500 shares of common stock, which are exercisable
    within 60 days of June 30, 2000.

(11) Includes options for 9,375 shares of common stock, which are exercisable
    within 60 days of June 30, 2000.

(12) Includes options for 233,375 shares of common stock, which are exercisable
    within 60 days of June 30, 2000.

                                 LEGAL MATTERS

    The validity of the shares of TriZetto common stock to be issued to IMS
HEALTH, as the sole stockholder of Erisco, pursuant to the merger will be passed
upon by Stradling Yocca Carlson & Rauth, a Professional Corporation, Newport
Beach, California. Stradling Yocca Carlson & Rauth and Sullivan & Cromwell will
deliver opinions concerning certain federal income tax consequences of the
merger.

                                    EXPERTS

    The financial statements of The TriZetto Group, Inc. as of December 31, 1999
and 1998 and for each of the three years in the period ended December 31, 1999
included in this proxy statement have been so included in reliance on the report
of PricewaterhouseCoopers LLP, independent accountants, given on the authority
of said firm as experts in auditing and accounting.

    The financial statements of ERISCO Managed Care Technologies, Inc. as of
December 31, 1999 and 1998 and for each of the three years in the period ended
December 31, 1999 included in this proxy statement have been so included in
reliance on the report of PricewaterhouseCoopers LLP, independent accountants,
given on the authority of said firm as experts in auditing and accounting.

    Representatives of PricewaterhouseCoopers LLP are expected to be present at
the TriZetto special meeting. The representatives will have the opportunity to
make a statement if they so desire and will be available to respond to
appropriate questions.

                             STOCKHOLDER PROPOSALS

    TriZetto expects to hold its 2001 Annual Meeting of the Stockholders on
May 16, 2001. Any stockholder desiring to submit a proposal for action at the
2001 Annual Meeting of Stockholders and presentation in TriZetto's proxy
statement for such meeting should deliver the proposal to TriZetto's principal
place of business no later than January 17, 2001 in order to be considered for
inclusion in the proxy statement relating to that meeting. Matters pertaining to
proposals, including the number and length thereof, eligibility of persons
entitled to have such proposals included and other aspects are regulated by the
Securities Exchange Act of 1934, Rules and Regulations of the Securities and
Exchange Commission and other laws and regulations to which interested persons
should refer.

    On May 21, 1998 the Securities and Exchange Commission adopted an amendment
to Rule 14a-4, as promulgated under the Securities and Exchange Act of 1934, as
amended. The amendment governs TriZetto's use of its discretionary proxy voting
authority with respect to a stockholder proposal, which is not addressed in the
proxy statement. The new amendment provides that if a proponent of a proposal

                                       77
<PAGE>
fails to notify TriZetto at least 45 days prior to the current year's
anniversary of the date of mailing of the prior year's proxy statement, then
TriZetto will be allowed to use its discretionary voting authority when the
proposal is raised at the meeting, without any discussion of the matter in the
proxy statement.

    If TriZetto does not receive any stockholder proposals for the 2001 Annual
Meeting before April 1, 2001, TriZetto will be able to use its voting authority
as outlined above.

                      WHERE YOU CAN FIND MORE INFORMATION

    TriZetto files reports, proxy statements and other information with the SEC.
You may read and copy any reports, proxy statements and other information that
TriZetto files at the following locations of the SEC:

<TABLE>
<S>                          <C>                          <C>
Public Reference Room        7 World Trade Center         Citicorp Center
450 Fifth Street, N.W.       Suite 1300                   Suite 1400
Room 1024                    New York, New York 10048     500 W. Madison Street
                                                          Chicago, Illinois
Washington, D.C. 20549                                    60661-2511
</TABLE>

    You may also obtain copies of this information by mail from the Public
Reference Section of the SEC, 450 Fifth Street, N.W., Room 1024, Washington,
D.C. 20549, at prescribed rates. Further information on the operation of the
SEC's Public Reference Room in Washington, D.C. can be obtained by calling the
SEC at 1-800-SEC-0330. The SEC also maintains an internet world wide web site
that contains reports, proxy statements and other information about issuers,
such as TriZetto and IMS HEALTH, who file electronically with the SEC. The
address of that site is http://www.sec.gov.

    You can also inspect reports, proxy statements and other information about
TriZetto at:

           The National Association of
           Securities Dealers
           1735 K Street, N.W.
           Washington, D.C. 20006

    This is a proxy statement of TriZetto. TriZetto has supplied all information
contained in this document relating to TriZetto, and IMS HEALTH and Erisco have
supplied all such information relating to Erisco.

    You can obtain copies of TriZetto's documents filed under the Securities
Exchange Act of 1934 from the SEC, through the SEC's Web site at the address
described above, or from TriZetto by requesting them in writing or by telephone
at the following addresses:

           The TriZetto Group, Inc.
           567 San Nicolas Drive, Suite 360
           Newport Beach, California 92660
           Attention: Secretary

    If you would like to request documents from us, please do so at least
fourteen days prior to the special meeting in order to receive them before the
TriZetto special meeting.

    YOU SHOULD RELY ONLY ON THE INFORMATION CONTAINED OR THE APPENDICES
INCORPORATED BY REFERENCE IN THIS PROXY STATEMENT TO VOTE ON THE MERGER.
TRIZETTO HAS NOT AUTHORIZED ANYONE TO PROVIDE YOU WITH INFORMATION THAT IS
DIFFERENT FROM WHAT IS CONTAINED IN THIS PROXY STATEMENT. THIS PROXY STATEMENT
IS DATED AUGUST   , 2000. YOU SHOULD NOT ASSUME THAT THE INFORMATION CONTAINED
IN THE PROXY STATEMENT IS ACCURATE AS OF ANY DATE OTHER THAN SUCH DATE, AND
NEITHER THE MAILING OF THE PROXY STATEMENT TO STOCKHOLDERS NOR THE ISSUANCE OF
TRIZETTO COMMON STOCK IN THE MERGER SHALL CREATE ANY IMPLICATION TO THE
CONTRARY.

                                       78
<PAGE>
                         INDEX TO FINANCIAL STATEMENTS

<TABLE>
<S>                                                           <C>
THE TRIZETTO GROUP, INC. AND SUBSIDIARIES

Report of Independent Accountants...........................      F-2

Consolidated Balance Sheets--June 30, 2000 (unaudited),
December 1999 and 1998......................................      F-3

Consolidated Statements of Operations*......................      F-4

Consolidated Statements of Stockholders' Equity
(Deficit)*..................................................      F-5

Consolidated Statements of Cash Flows*......................      F-6

Notes to Consolidated Financial Statements..................   F-7-24

ERISCO MANAGED CARE TECHNOLOGIES, INC.

Report of Independent Accountants...........................     F-25

Statements of Income**......................................     F-26

Statements of Financial Position--June 30, 2000 (unaudited),
December 1999 and 1998......................................     F-27

Statements of Cash Flows**..................................     F-28

Statements of Shareholder's Equity**........................     F-29

Notes to Financial Statements...............................  F-30-40

CROGHAN & ASSOCIATES, INC.

Report of Independent Accountants...........................     F-41

Statements of Operations....................................     F-42

Statements of Stockholders Equity...........................     F-43

Statements of Cash Flows....................................     F-44

Notes to Financial Statements...............................  F-45-47

------------------------
* For the six months ended June 30, 2000 (unaudited), the years ended
  December 31, 1999 and 1998 and the period from May 27, 1997 (date of
  inception) to December 31, 1997.
** For the six months ended June 30, 2000 (unaudited) and the years
ended December 31, 1999, 1998 and 1997.
</TABLE>

                                      F-1
<PAGE>
                       REPORT OF INDEPENDENT ACCOUNTANTS

To the Board of Directors and Stockholders
  of The TriZetto Group, Inc.

    In our opinion, the accompanying consolidated balance sheets and the related
consolidated statements of operations, stockholders' equity (deficit) and cash
flows present fairly, in all material respects, the financial position of The
TriZetto Group, Inc. and its subsidiaries at December 31, 1999 and 1998 and the
results of their operations and their cash flows for the years ended
December 31, 1999 and 1998 and for the period from May 27, 1997 (date of
inception) to December 31, 1997, in conformity with accounting principles
generally accepted in the United States. These financial statements are the
responsibility of the Company's management; our responsibility is to express an
opinion on these financial statements based on our audits. We conducted our
audits of these statements in accordance with auditing standards generally
accepted in the United States which require that we plan and perform the audit
to obtain reasonable assurance about whether the financial statements are free
of material misstatement. An audit includes examining, on a test basis, evidence
supporting the amounts and disclosures in the financial statements, assessing
the accounting principles used and significant estimates made by management, and
evaluating the overall financial statement presentation. We believe that our
audits provide a reasonable basis for the opinion expressed above.

                                          PRICEWATERHOUSECOOPERS LLP

San Jose, California
February 16, 2000

                                      F-2
<PAGE>
                   THE TRIZETTO GROUP, INC. AND SUBSIDIARIES

                          CONSOLIDATED BALANCE SHEETS

                                 (IN THOUSANDS)

<TABLE>
<CAPTION>
                                                                               DECEMBER 31,
                                                               JUNE 30,     -------------------
                                                                 2000         1999       1998
                                                              -----------   --------   --------
                                                              (UNAUDITED)
<S>                                                           <C>           <C>        <C>
ASSETS:
Current assets:
  Cash and cash equivalents.................................   $  8,433     $18,849     $3,681
  Short-term investments....................................         --       5,957         --
  Accounts receivable, less allowance for doubtful accounts
    of $948, $597 and $204, respectively....................      9,269       8,228      3,083
  Note receivable from related party........................         25          25         25
  Prepaid expenses and other current assets.................      2,237       1,776        194
  Income tax receivable.....................................        454         440        406
  Deferred taxes............................................         --          --        191
                                                               --------     -------     ------
    Total current assets....................................     20,418      35,275      7,580
  Property and equipment, net...............................     11,707      10,797        989
  Long-term investments.....................................      3,434       1,230         --
  Other assets..............................................      1,590         265         40
  Note receivable from related party........................        264         525         75
  Goodwill and other intangible assets, net.................     21,426      20,326         36
                                                               --------     -------     ------
    Total assets............................................   $ 58,839     $68,418     $8,720
                                                               ========     =======     ======
LIABILITIES, MANDATORILY REDEEMABLE CONVERTIBLE PREFERRED
  STOCK AND STOCKHOLDERS' EQUITY (DEFICIT)
Current liabilities:
  Short-term note payable...................................   $  2,929     $   623     $   52
  Capital lease obligations, current........................      1,558       1,234         28
  Accounts payable..........................................      2,289       3,102         95
  Accrued liabilities.......................................      9,062       9,172      1,815
  Income taxes payable......................................         10          22         --
  Deferred revenue..........................................        177         241         --
                                                               --------     -------     ------
    Total current liabilities...............................     16,025      14,394      1,990
  Long-term notes payable...................................        324         504         --
  Capital lease obligations.................................      2,535       2,224        125
  Note payable to related party.............................         --          --        520
  Deferred revenue..........................................        113          --        377
                                                               --------     -------     ------
    Total liabilities.......................................     18,997      17,122      3,012
                                                               ========     =======     ======
Commitments (Note 6) Mandatorily redeemable convertible
  preferred stock: $0.001 par value; Shares authorized:
  10,392 Shares issued and outstanding: none in 2000 and
  1999 and 4,545 in 1998....................................         --          --      6,449
                                                               --------     -------     ------
Stockholders' equity (deficit):
  Common stock: $0.001 par value; Shares authorized: 40,000
    Shares issued and outstanding: 21,393 in 2000, 20,923 in
    1999 and 9,217 in 1998..................................         21          20          9
  Additional paid-in capital................................     70,400      66,215        940
  Notes receivable from stockholders........................        (41)        (41)      (741)
  Deferred stock compensation...............................     (4,894)     (5,786)      (460)
  Other comprehensive loss..................................         (2)         --         --
  Accumulated deficit.......................................    (25,642)     (9,112)      (489)
                                                               --------     -------     ------
    Total stockholders' equity (deficit)....................     39,842      51,296       (741)
                                                               --------     -------     ------
      Total liabilities, mandatorily redeemable convertible
       preferred stock and stockholders' equity (deficit)...   $ 58,839     $68,418     $8,720
                                                               ========     =======     ======
</TABLE>

  The accompanying notes are an integral part of these consolidated financial
                                  statements.

                                      F-3
<PAGE>
                   THE TRIZETTO GROUP, INC. AND SUBSIDIARIES

                     CONSOLIDATED STATEMENTS OF OPERATIONS

                     (IN THOUSANDS, EXCEPT PER SHARE DATA)

<TABLE>
<CAPTION>
                                              FOR THE SIX MONTHS                                     FOR THE PERIOD
                                                    ENDED                FOR THE YEAR ENDED         FROM MAY 27, 1997
                                            ----------------------   ---------------------------   (DATE OF INCEPTION)
                                             JUNE 30,     JUNE 30,   DECEMBER 31,   DECEMBER 31,     TO DECEMBER 31,
                                               2000         1999         1999           1998              1997
                                            -----------   --------   ------------   ------------   -------------------
                                            (UNAUDITED)
<S>                                         <C>           <C>        <C>            <C>            <C>
Revenues:
  Recurring revenue.......................   $ 24,344      $6,201      $19,448        $ 5,300             $1,191
  Non-recurring revenue...................     11,132       6,508       13,478          6,131              1,328
                                             --------      ------      -------        -------             ------
Total revenues............................     35,476      12,709       32,926         11,431              2,519
                                             --------      ------      -------        -------             ------
Cost of revenues:
  Recurring revenue.......................     22,656       5,038       17,057          3,967              1,250
  Non-recurring revenue...................      7,756       4,109        9,751          3,490                422
                                             --------      ------      -------        -------             ------
  Total cost of revenues..................     30,412       9,147       26,808          7,457              1,672
                                             --------      ------      -------        -------             ------
Gross profit..............................      5,064       3,562        6,118          3,974                847
                                             --------      ------      -------        -------             ------
Operating expenses:
  Research and development................      3,197         440        2,371          1,083                 --
  Selling, general and administrative.....     17,395       3,098        9,694          2,885                672
  Amortization of deferred stock
    compensation..........................        892         215        1,057             22                 --
  Write-off of acquired in-process
    technology............................        536         484        1,407             --                 --
                                             --------      ------      -------        -------             ------
Total operating expenses..................     22,020       4,237       14,529          3,990                672
                                             --------      ------      -------        -------             ------
Income (loss) from operations.............    (16,956)       (675)      (8,411)           (16)               175
Interest income...........................        609          76          527            210                 15
Interest expense..........................       (183)       (100)        (256)           (52)               (13)
                                             --------      ------      -------        -------             ------
Income (loss) before provision for income
  taxes...................................    (16,530)       (699)      (8,140)           142                177
Provision for (benefit of) income taxes...         --          28         (213)            82                 74
                                             --------      ------      -------        -------             ------
Net income (loss).........................   $(16,530)     $ (727)     $(7,927)       $    60             $  103
                                             ========      ======      =======        =======             ======
Net income (loss) per share:
  Basic...................................   $  (0.85)     $(0.12)     $ (0.85)       $  0.01             $ 0.05
                                             ========      ======      =======        =======             ======
  Diluted.................................   $  (0.85)     $(0.12)     $ (0.85)       $  0.00             $ 0.03
                                             ========      ======      =======        =======             ======
Shares used in computing net income (loss)
  per share:
  Basic...................................     19,557       6,216        9,376          4,937              2,065
                                             ========      ======      =======        =======             ======
  Diluted.................................     19,557       6,216        9,376         12,783              4,074
                                             ========      ======      =======        =======             ======
</TABLE>

  The accompanying notes are an integral part of these consolidated financial
                                  statements.

                                      F-4
<PAGE>
                   THE TRIZETTO GROUP, INC. AND SUBSIDIARIES
           CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT)
   FOR THE PERIOD FROM MAY 27, 1997 (DATE OF INCEPTION) TO DECEMBER 31, 1999
                                 (IN THOUSANDS)
<TABLE>
<CAPTION>
                                                                           NOTES
                                        COMMON STOCK       ADDITIONAL    RECEIVABLE      DEFERRED          OTHER
                                     -------------------    PAID-IN         FROM           STOCK       COMPREHENSIVE
                                      SHARES     AMOUNT     CAPITAL     STOCKHOLDERS   COMPENSATION         LOSS
                                     --------   --------   ----------   ------------   -------------   --------------
<S>                                  <C>        <C>        <C>          <C>            <C>             <C>
Issuance of common stock...........    2,500      $ 3       $    13         $ --          $    --           $--
Issuance of common stock for
  services rendered................    1,217        1             7           --               --            --
Issuance of common stock for
  purchase of Croghan & Associates,
  Inc..............................    5,801        6           430           --               --            --
Issuance of common stock for note
  receivable.......................      175       --            13          (13)              --            --
Net income.........................       --       --            --           --               --            --
                                      ------      ---       -------         ----          -------           ---
Balance, December 31, 1997.........    9,693       10           463          (13)              --            --
Issuance of common stock...........       75       --             9           --               --            --
Issuance of common stock for note
  receivable.......................      390       --            53          (53)              --            --
Repurchase of common stock.........     (941)      (1)          (67)          --               --            --
Payments on notes receivable.......       --       --            --           25               --            --
Notes issued to stockholders.......       --       --            --         (700)              --            --
Deferred stock compensation........       --       --           482           --             (482)           --
Amortization of deferred stock
  compensation.....................       --       --            --           --               22            --
Net income.........................       --       --            --           --               --            --
                                      ------      ---       -------         ----          -------           ---
Balance, December 31, 1998.........    9,217        9           940         (741)            (460)           --
Issuance of common stock to
  purchase Creative Business
  Solutions, Inc. and HealthWeb
  Systems, Ltd.....................      655        1         1,145           --               --            --
Issuance of common stock to
  purchase assets of Management &
  Technology Solutions, Inc........       60       --           140           --               --            --
Issuance of common stock for
  purchase of Novalis
  Corporation......................      549        1         8,999           --               --            --
Issuance of common stock for
  purchase of Finserv Health Care
  Systems, Inc.....................       49       --         1,499           --               --            --
Repurchase of common stock in
  exchange of notes receivable from
  stockholders.....................     (563)      (1)           (3)         700               --            --
Deferred stock compensation........       --       --         6,383           --           (6,383)           --
Amortization of deferred stock
  compensation.....................       --       --            --           --            1,057            --
Stock compensation.................       --       --            53           --               --            --
Repurchase common stock............       (6)      --            --           --               --            --
Exercise of common stock options
  and warrants.....................      206       --           141           --               --            --
Issuance of common stock related to
  initial public offering, net.....    4,480        4        35,992           --               --            --
Conversion of preferred stock to
  common stock.....................    6,276        6        10,926           --               --            --
Net loss...........................       --       --            --           --               --            --
                                      ------      ---       -------         ----          -------           ---
Balance, December 31, 1999.........   20,923       20        66,215          (41)          (5,786)           --
Issuance of common stock for
  purchase of Healthcare Media
  Enterprises, Inc. (unaudited)....       87       --         3,500           --               --            --
Issuance of common stock for
  employee stock purchase
  (unaudited)......................       37       --           514           --               --            --
Exercise of common stock options
  (unaudited)......................      346        1           171           --               --            --
Amortization of deferred stock
  (unaudited)......................       --       --            --           --              892            --
Translation loss (unaudited).......       --       --            --           --               --            (2)
Net loss (unaudited)...............       --       --            --           --               --            --
                                      ------      ---       -------         ----          -------           ---
Balance, June 30, 2000
  (unaudited)......................   21,393      $21       $70,400         $(41)         $(4,894)          $(2)
                                      ======      ===       =======         ====          =======           ===

<CAPTION>
                                       RETAINED         TOTAL
                                       EARNINGS     STOCKHOLDERS'
                                     (ACCUMULATED      EQUITY
                                       DEFICIT)       (DEFICIT)
                                     ------------   -------------
<S>                                  <C>            <C>
Issuance of common stock...........    $     --        $    16
Issuance of common stock for
  services rendered................          --              8
Issuance of common stock for
  purchase of Croghan & Associates,
  Inc..............................          --            436
Issuance of common stock for note
  receivable.......................          --             --
Net income.........................         103            103
                                       --------        -------
Balance, December 31, 1997.........         103            563
Issuance of common stock...........          --              9
Issuance of common stock for note
  receivable.......................          --             --
Repurchase of common stock.........        (652)          (720)
Payments on notes receivable.......          --             25
Notes issued to stockholders.......          --           (700)
Deferred stock compensation........          --             --
Amortization of deferred stock
  compensation.....................          --             22
Net income.........................          60             60
                                       --------        -------
Balance, December 31, 1998.........        (489)          (741)
Issuance of common stock to
  purchase Creative Business
  Solutions, Inc. and HealthWeb
  Systems, Ltd.....................          --          1,146
Issuance of common stock to
  purchase assets of Management &
  Technology Solutions, Inc........          --            140
Issuance of common stock for
  purchase of Novalis
  Corporation......................          --          9,000
Issuance of common stock for
  purchase of Finserv Health Care
  Systems, Inc.....................          --          1,499
Repurchase of common stock in
  exchange of notes receivable from
  stockholders.....................        (696)            --
Deferred stock compensation........          --             --
Amortization of deferred stock
  compensation.....................          --          1,057
Stock compensation.................          --             53
Repurchase common stock............          --             --
Exercise of common stock options
  and warrants.....................          --            141
Issuance of common stock related to
  initial public offering, net.....          --         35,996
Conversion of preferred stock to
  common stock.....................          --         10,932
Net loss...........................      (7,927)        (7,927)
                                       --------        -------
Balance, December 31, 1999.........      (9,112)        51,296
Issuance of common stock for
  purchase of Healthcare Media
  Enterprises, Inc. (unaudited)....          --          3,500
Issuance of common stock for
  employee stock purchase
  (unaudited)......................          --            514
Exercise of common stock options
  (unaudited)......................          --            172
Amortization of deferred stock
  (unaudited)......................          --            892
Translation loss (unaudited).......          --             (2)
Net loss (unaudited)...............     (16,530)       (16,530)
                                       --------        -------
Balance, June 30, 2000
  (unaudited)......................    $(25,642)       $39,842
                                       ========        =======
</TABLE>

  The accompanying notes are an integral part of these consolidated financial
                                  statements.

                                      F-5
<PAGE>
                   THE TRIZETTO GROUP, INC. AND SUBSIDIARIES

                     CONSOLIDATED STATEMENTS OF CASH FLOWS

                                 (IN THOUSANDS)

<TABLE>
<CAPTION>
                                                                                                             FOR THE PERIOD
                                                                                                              FROM MAY 27,
                                                         SIX MONTHS ENDED          FOR THE YEAR ENDED        1997 (DATE OF
                                                      ----------------------   ---------------------------   INCEPTION) TO
                                                       JUNE 30,     JUNE 30,   DECEMBER 31,   DECEMBER 31,    DECEMBER 31,
                                                         2000         1999         1999           1998            1997
                                                      -----------   --------   ------------   ------------   --------------
                                                      (UNAUDITED)
<S>                                                   <C>           <C>        <C>            <C>            <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
  Net income (loss).................................   $(16,530)     $ (727)     $(7,927)        $   60           $103
  Adjustments to reconcile net income (loss) to net
    cash provided by (used in) operating activities:
    Provision for doubtful accounts.................        351         135          505            203            204
    Common stock issued for services rendered.......         --          --           --             --              8
    Amortization of deferred stock compensation.....        892         215        1,057             22             --
    Write-off of acquired in-process technology.....        536         484        1,407             --             --
    Forgiveness of note receivable..................         --          32           32             --             --
    Stock compensation..............................         --          53           53             --             --
    Deferred taxes..................................         --        (709)        (186)           (83)          (105)
    Loss on disposal of property and equipment......        151          --           --            187            130
    Depreciation and amortization...................      5,496         648        2,415            161             24
  Changes in assets and liabilities:
    Accounts receivable.............................     (1,187)     (1,654)      (3,080)        (2,127)          (762)
    Prepaid expenses and other current assets.......         90          72       (1,271)           (75)           (99)
    Income tax receivable...........................        (14)        406          (34)          (406)            --
    Notes receivable................................       (226)         --           --             --             --
    Accounts payable................................       (842)        967        1,364             32           (128)
    Accrued liabilities.............................       (303)      1,870        2,604            976            614
    Deferred revenue................................         38          --          241           (248)           247
    Other long-term assets..........................       (162)        (53)        (181)           (16)            --
                                                       --------      ------      -------         ------           ----
    Net cash provided by (used in) operating
      activities....................................    (11,710)      1,739       (3,001)        (1,314)           236
                                                       --------      ------      -------         ------           ----
CASH FLOWS FROM INVESTING ACTIVITIES:
  Proceeds (purchase) of short-term and long-term
    investments, net................................      3,753          --       (7,187)            --             --
  Purchase of property and equipment and software
    licenses........................................     (3,015)     (1,334)      (3,208)          (750)          (121)
  Purchase of MedPartners' assets...................                 (2,630)      (2,630)            --             --
  Acquisitions and related costs, net of cash
    acquired........................................     (2,670)     (1,238)      (7,338)            --            614
                                                       --------      ------      -------         ------           ----
  Net cash provided by (used in) investing
    activities......................................     (1,932)     (5,202)     (20,363)          (750)           493
                                                       --------      ------      -------         ------           ----
CASH FLOW FROM FINANCING ACTIVITIES:
  Proceeds from issuance of common stock, net.......        515          --       35,996              9             16
  Proceeds from issuance of mandatorily redeemable
    convertible preferred stock, net................                  4,483        4,483          6,449             --
  Repurchases of common stock.......................         --          --           --           (720)            --
  Proceeds from issuance of notes payable...........         --          --           --             56             86
  Payments of notes payable, net....................       (675)       (267)      (1,275)           (32)           (58)
  Proceeds (payment) on line of credit, net.........      2,756        (265)        (265)            --             --
  Principal payments on capital leases..............       (704)       (166)        (448)           (15)            --
  Proceeds from equipment line of credit............      1,164          --           --             --             --
  Issuance of notes receivable......................         --          --           --           (800)            --
  Repayment of notes receivable.....................         --          30           30             25             --
  Employee exercise of stock options................        172          --           11             --             --
                                                       --------      ------      -------         ------           ----
    Net cash provided by financing activities.......      3,228       3,815       38,532          4,972             44
                                                       --------      ------      -------         ------           ----
  Net increase (decrease) in cash and cash
    equivalents.....................................    (10,414)        352       15,168          2,908            773
  Effect of exchange rate changes on cash and cash
    equivalents.....................................         (2)         --           --             --             --
  Cash and cash equivalents at beginning of
    period..........................................     18,849       3,681        3,681            773             --
                                                       --------      ------      -------         ------           ----
  Cash and cash equivalents at end of period........   $  8,433      $4,033      $18,849         $3,681           $773
                                                       ========      ======      =======         ======           ====
</TABLE>

  The accompanying notes are an integral part of these consolidated financial
                                  statements.

                                      F-6
<PAGE>
                   THE TRIZETTO GROUP, INC. AND SUBSIDIARIES

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1.  FORMATION AND BUSINESS OF THE COMPANY

    The TriZetto Group, Inc. (the "Company"), was incorporated in the state of
Delaware on May 27, 1997. The Company is a provider of remotely hosted software
applications, both third party packaged and proprietary software, and related
services used in the healthcare industry. The Company also offers an Internet
browser application that serves as a portal for the exchange of healthcare
information and services over the Internet. The Company provides access to its
hosted applications either through the Internet or through traditional networks.

2.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

UNAUDITED INTERIM FINANCIAL INFORMATION

    The accompanying consolidated financial statements at June 30, 2000 and for
the six months ended June 30, 2000, together with the related notes, are
unaudited but include all adjustments (consisting only of normal recurring
adjustments) which, in the opinion of management, are necessary for a fair
presentation, in all material respects, of the financial position and the
operating results and cash flows for the interim date and period presented.
Results for the interim period ended June 30, 2000 are not necessarily
indicative of results for the entire fiscal year or future periods.

BASIS OF CONSOLIDATION

    The consolidated financial statements include the accounts of the Company
and its wholly owned subsidiaries. All intercompany transactions have been
eliminated in consolidation.

USE OF ESTIMATES

    The preparation of consolidated financial statements in conformity with
generally accepted accounting principles requires management to make estimates
and assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and reported amounts of revenues and expenses during the reporting
period. Actual results could differ from those estimates.

CONCENTRATION OF CREDIT RISK

    Financial instruments that potentially subject the Company to a
concentration of credit risk consist of cash and cash equivalents and accounts
receivable. Cash and cash equivalents are deposited in demand and money market
accounts in three financial institutions. Deposits held with banks may exceed
the amount of insurance provided on such deposits. The Company has not
experienced any losses on its deposits of cash and cash equivalents. The
Company's accounts receivable are derived from revenue earned from customers
located in the United States. The Company performs ongoing credit evaluations of
its customers' financial condition and, generally, requires no collateral from
its customers. The Company maintains an allowance for doubtful accounts
receivable based upon the expected collectibility of individual accounts.

                                      F-7
<PAGE>
                   THE TRIZETTO GROUP, INC. AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

2.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
    The following tables summarize the revenues and accounts receivable balances
from customers in excess of 10% of total revenues and total accounts receivable
balances, respectively:

<TABLE>
<CAPTION>
                                                                                            FOR THE PERIOD
                                                                    YEAR ENDED             FROM MAY 27, 1997
                                                                   DECEMBER 31,           (DATE OF INCEPTION)
                                                              ----------------------        TO DECEMBER 31,
                                                                1999          1998               1997
                                                              --------      --------      -------------------
<S>                                                           <C>           <C>           <C>
REVENUES:
  Company A.................................................    16%           42%                 40%
  Company B.................................................     0%           11%                 16%
  Company C.................................................    19%            0%                  0%
</TABLE>

<TABLE>
<CAPTION>
                                                                          DECEMBER 31,
                                                              ------------------------------------
                                                                1999          1998          1997
                                                              --------      --------      --------
<S>                                                           <C>           <C>           <C>
ACCOUNTS RECEIVABLE:
  Company A.................................................     0%           56%           40%
  Company B.................................................     0%            0%           20%
  Company C.................................................     0%            0%           13%
  Company D.................................................    13%            0%            0%
</TABLE>

FAIR VALUE OF FINANCIAL INSTRUMENTS

    Carrying amounts of certain of the Company's financial instruments including
cash and cash equivalents, accounts receivable and accounts payable approximate
fair value due to their short maturities. Based on borrowing rates currently
available to the Company for loans with similar terms, the carrying value of its
debt obligations approximates fair value.

CASH AND CASH EQUIVALENTS

    The Company considers all highly liquid investments purchased with an
original maturity of three months or less to be cash equivalents. Cash and cash
equivalents include money market funds and various deposit accounts.

INVESTMENTS

    At December 31, 1999, short-term investments consisted of debt securities
with original maturities between three months and one year when purchased.
Investments with original maturities greater then one year from the date of
purchase have been classified as long-term investments. The Company has
determined that all of its debt securities should be classified as
available-for-sale. The difference between the cost basis and the market value
of the Company's investments was not material at December 31, 1999. The
Company's investments at December 31, 1999 primarily consisted of corporate
bonds and debt. Long-term investments of $1.2 million mature during 2001.

PROPERTY AND EQUIPMENT

    Property and equipment are stated at cost and are depreciated on a
straight-line basis over their estimated useful lives of five to seven years.
Leasehold improvements are amortized over their estimated useful lives, or the
lease term if shorter. Upon retirement or sale, the cost and related

                                      F-8
<PAGE>
                   THE TRIZETTO GROUP, INC. AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

2.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
accumulated depreciation are removed from the balance sheet and the resulting
gain or loss is reflected in operations. Maintenance and repairs are charged to
operations as incurred.

GOODWILL AND OTHER INTANGIBLE ASSETS

    Intangible assets arose from the Company's acquisitions. Goodwill is being
amortized on a straight-line basis over five to seven years. Other intangible
assets consist of acquired work force, customer lists and core technology which
are being amortized on a straight-line basis over their estimated useful lives
of two to four, five and three years, respectively. Software technology rights
are amortized on a straight-line basis over the lesser of the contract term or
five years.

LONG-LIVED ASSETS

    Long-lived assets and certain intangible assets are reviewed for impairment
when events or changes in circumstances indicate the carrying amount of an asset
may not be recoverable. Recoverability is measured by comparison of the asset's
carrying amount to future net undiscounted cash flows the assets are expected to
generate. If such assets are considered to be impaired, the impairment to be
recognized is measured by the amount by which the carrying amount of the assets
exceeds the projected discounted future net cash flows arising from the asset.

REVENUE RECOGNITION

    Recurring revenue, or multi-year contractually based revenue, is recognized
monthly based upon volume of service transactions. Non-recurring revenue is
generally billed on a time and materials basis, and is recognized as the
non-recurring services are performed. Provisions for estimated losses on fixed
fee contracts are recorded when identified.

RESEARCH AND DEVELOPMENT

    Research and development costs are charged to operations as incurred.

INCOME TAXES

    The Company accounts for income taxes under the liability method. Under this
method, deferred tax assets and liabilities are determined based on the
difference between the financial statement and tax bases of assets and
liabilities using enacted tax rates in effect for the year in which the
differences are expected to affect taxable income. A valuation allowance is
established when necessary to reduce deferred tax assets to the amounts expected
to be realized.

                                      F-9
<PAGE>
                   THE TRIZETTO GROUP, INC. AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

2.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)

COMPUTATION OF INCOME (LOSS) PER SHARE

    Basic earnings per share ("EPS") is computed by dividing net income (loss)
by the weighted average number of common shares outstanding for the period.
Diluted EPS reflects the potential dilution that could occur from common shares
issuable through stock options, warrants and other convertible securities. The
following is a reconciliation of the numerator (net income (loss)) and the
denominator (number of shares) used in the basic and diluted EPS calculations
(in thousands, except per share data):

<TABLE>
<CAPTION>
                                                                                                        FOR THE PERIOD
                                                          SIX MONTHS ENDED          YEAR ENDED         FROM MAY 27, 1997
                                                              JUNE 30,             DECEMBER 31,       (DATE OF INCEPTION)
                                                       ----------------------   -------------------     TO DECEMBER 31,
                                                          2000         1999       1999       1998            1997
                                                       -----------   --------   --------   --------   -------------------
                                                       (UNAUDITED)
<S>                                                    <C>           <C>        <C>        <C>        <C>
BASIC:
  Net income (loss)..................................   $(16,530)    $  (727)   $(7,927)   $    60           $  103
                                                        --------     -------    -------    -------           ------
  Weighted average common shares outstanding.........     19,557       6,216      9,376      4,937            2,065
                                                        --------     -------    -------    -------           ------
  Net income (loss) per share........................   $  (0.85)    $ (0.12)   $ (0.85)   $  0.01           $ 0.05
                                                        ========     =======    =======    =======           ======
DILUTED:
  Net income (loss)..................................   $(16,530)    $  (727)   $(7,927)   $    60           $  103
                                                        --------     -------    -------    -------           ------
  Weighted average common shares outstanding.........     19,557       6,216      9,376      4,937            2,065
  Preferred stock....................................         --          --         --      2,888               --
  Options to purchase common stock...................         --          --         --        305               --
  Common stock subject to repurchase.................         --          --         --      4,640            2,009
  Warrants...........................................         --          --         --         13               --
                                                        --------     -------    -------    -------           ------
  Total weighted common stock and common stock
    equivalents......................................     19,557       6,216      9,376     12,783            4,074
                                                        --------     -------    -------    -------           ------
  Net income (loss) per share........................   $  (0.85)    $ (0.12)   $ (0.85)   $  0.00           $ 0.03
                                                        ========     =======    =======    =======           ======
ANTIDILUTIVE POTENTIAL COMMON SHARES:
  Preferred stock....................................         --       6,276         --         --               --
  Contingently issuable shares.......................        535          --        518         --               --
  Options to purchase common stock...................      3,495       2,801      2,207         --               --
  Common stock subject to repurchase.................         --       1,705      1,698         --               --
  Warrants...........................................         --         163         --         --              163
                                                        --------     -------    -------    -------           ------
                                                           4,030      10,945      4,423         --              163
                                                        ========     =======    =======    =======           ======
</TABLE>

COMPREHENSIVE INCOME

    The Company has adopted the provisions of Statement of Financial Accounting
Standards ("SFAS") No. 130, "Comprehensive Income." SFAS 130 establishes
standards for reporting and display of comprehensive income and its components
for general-purpose financial statements. Comprehensive income is defined as net
income plus all revenues, expenses, gains and losses from non-owner sources that
are excluded from net income in accordance with generally accepted accounting
principles. For the six months ended June 30, 2000, the only item of other
comprehensive income was $2,000 of translation loss, resulting in comprehensive
net loss of $16,532,000. There were no differences between comprehensive and net
income in any other period presented.

                                      F-10
<PAGE>
                   THE TRIZETTO GROUP, INC. AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

2.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
RECENT ACCOUNTING PRONOUNCEMENTS

    In June 1998, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards No. 133, ("SFAS 133"), Accounting for Derivative
Instruments and Hedging activities. SFAS 133 establishes methods of accounting
and reporting for derivative instruments and hedging activities related to those
instruments as well as other hedging activities, and is effective for all fiscal
quarters for all fiscal years beginning after June 15, 2000, as amended by
SFAS 137. It requires that an entity recognize all derivatives as either assets
or liabilities in the statement of financial position and measure those
instruments at fair value. To date, we have not engaged in derivative and
hedging activities.

    In December 1999, the Securities and Exchange Commission ("SEC") issued
Staff Accounting Bulletin No. 101 ("SAB 101"), Revenue Recognition, which
outlines the basic criteria that must be met to recognize revenue and provides
guidance for presentation of revenue and for disclosure related to revenue
recognition policies in financial statements filed with the SEC. We believe that
adopting SAB 101 will not have a material impact on our financial position or
results of operations.

3.  BALANCE SHEET ACCOUNTS

<TABLE>
<CAPTION>
                                                                 DECEMBER 31,
                                                              -------------------
                                                                1999       1998
                                                              --------   --------
<S>                                                           <C>        <C>
PROPERTY AND EQUIPMENT
  Computer equipment........................................  $ 7,166     $  633
  Furniture and fixtures....................................    1,607        138
  Equipment.................................................      841        191
  Software..................................................    2,401        142
  Leasehold improvements....................................      187         24
                                                              -------     ------
                                                               12,202      1,128
Less: Accumulated depreciation and amortization.............   (1,405)      (139)
                                                              -------     ------
                                                              $10,797     $  989
                                                              =======     ======
</TABLE>

                                      F-11
<PAGE>
                   THE TRIZETTO GROUP, INC. AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

3.  BALANCE SHEET ACCOUNTS (CONTINUED)
    Included in property and equipment at December 31, 1999 and December 31,
1998 is equipment acquired under capital leases totaling approximately
$4,100,000 and $167,000, respectively, and related accumulated amortization of
$538,000 and $17,000, respectively.

<TABLE>
<CAPTION>
                                                                 DECEMBER 31,
                                                              -------------------
                                                                1999       1998
                                                              --------   --------
                                                                (IN THOUSANDS)
<S>                                                           <C>        <C>
INTANGIBLE ASSETS
  Software licenses.........................................  $ 2,707      $ 54
  Goodwill..................................................    8,272        --
  Acquired workforce........................................    1,687        --
  Customer lists............................................    4,184        --
  Core technology...........................................    4,527        --
                                                              -------      ----
                                                               21,377        54
Less: Accumulated amortization..............................   (1,051)      (18)
                                                              -------      ----
                                                              $20,326      $ 36
                                                              =======      ====
</TABLE>

<TABLE>
<CAPTION>
                                                                 DECEMBER 31,
                                                              -------------------
                                                                1999       1998
                                                              --------   --------
                                                                (IN THOUSANDS)
<S>                                                           <C>        <C>
ACCRUED LIABILITIES
  Accrued payroll and benefits..............................   $4,080     $1,285
  Accrued professional fees.................................      477        234
  Accrued acquisition expenses..............................    2,445         --
  Other.....................................................    2,170        296
                                                               ------     ------
                                                               $9,172     $1,815
                                                               ======     ======
</TABLE>

4.  NOTES PAYABLE AND LINE OF CREDIT

   In December 1998, the Company entered into a financing agreement for
approximately $56,000 relating to premiums for business insurance. The amount is
due in nine monthly installments and bears interest at 9.75% per annum. The
financing company collateralized the loan by potential proceeds obtained from a
claim on the insurance (unearned insurance provisions, loss payments that reduce
the unearned premiums and any related interests arising from a state guarantee
fund). At December 31, 1999, there was no outstanding balance under this credit
facility.

    In January 1999, the Company entered into a financing agreement for $675,000
in order to acquire a software license. The non-interest bearing note (imputed
interest rate of 7.80%) is due in sixty equal monthly installments. Borrowings
under the financing agreement are collateralized by the software that the
Company purchased with the note proceeds. At December 31, 1999, there was
approximately $471,000 principal balance remaining on the note.

    In connection with the acquisition of Creative Business Solutions, Inc. and
HealthWeb Systems, Ltd. in February 1999 (Note 10), the Company issued notes of
$270,000. The notes bear interest at 8.00% per annum and the interest is payable
annually in arrears. Fifty percent of the principal balance is payable on the
first anniversary and fifty percent is payable on the second anniversary of the
issue date. At December 31, 1999, there was $270,000 principal balance remaining
on the notes.

                                      F-12
<PAGE>
                   THE TRIZETTO GROUP, INC. AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

4.  NOTES PAYABLE AND LINE OF CREDIT (CONTINUED)
    In March 1999, the Company entered into a revolving line of credit agreement
with a financial institution. In October 1999, we entered into a subsequent
agreement which increased the amount available under the line of credit. The
line of credit has a total capacity of $3.0 million and expires in
November 2000. Borrowings under the line of credit bear interest at prime plus
0.50% (9.0% at December 31, 1999) and are collateralized by substantially all of
the assets of the Company. Interest is payable monthly as it accrues. The line
of credit agreement contains certain covenants that the Company must adhere to
during the term of the agreement including restrictions on the payment of
dividends. As of December 31, 1999, there were no outstanding borrowings on the
line of credit. The Company has outstanding four standby letters of credit in
the aggregate amount of $319,000 which serve as security deposits for four of
the Company's capital leases.

    In May 1999, the Company entered into a financing agreement for
approximately $1,131,000. The amount is due in twelve equal monthly installments
and bears interest at 10% per annum. Borrowings under the financing agreement
are collateralized by the license that the Company purchased from the lender. At
December 31, 1999, there was approximately $386,000 principal balance remaining
on the note.

    In December 1999, the Company entered into a lease line of credit with a
financial institution. The line of credit has a total capacity of $2.0 million
and expires in December 2000. Borrowings under the line of credit at
December 31, 1999 were approximately $973,000, and are collateralized by
substantially all of the assets of the Company.

    Future principal payments of notes payable at December 31, 1999 are as
follows:

<TABLE>
<CAPTION>
FOR THE PERIODS ENDING DECEMBER 31,
-----------------------------------
<S>                                                           <C>
  2000......................................................   $  623
  2001......................................................      245
  2002......................................................      119
  2003......................................................      129
  2004......................................................       11
                                                               ------
                                                                1,127
Less: Current portion.......................................     (623)
                                                               ------
                                                               $  504
                                                               ======
</TABLE>

5.  RELATED PARTY TRANSACTIONS

   In September 1997, the Company entered into a $520,000 financing agreement,
bearing interest at 9% and payable quarterly beginning January 1, 1998. The
principal amount is due October 1, 2002. In connection with the financing
agreement, the Company issued to the financing company warrants to purchase
162,595 shares of common stock with an exercise price of $0.80 per share
(Note 7). A member of the Company's Board of Directors owns 50% of the financing
company. In August 1999, the warrant to purchase 162,595 shares of common stock
was exercised, reducing the principal amount by $130,000. In October 1999, the
Company paid off the remaining principal balance of $390,000.

    The Company has a note receivable for $100,000 from an officer of the
Company. The note accrues interest at 6.5% per annum. The principal and accrued
interest will be forgiven annually over a four year period beginning April 30,
1999 provided the officer is an employee of the Company. In the event of
termination of the officer's employment with the Company the note and accrued
interest

                                      F-13
<PAGE>
                   THE TRIZETTO GROUP, INC. AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

5.  RELATED PARTY TRANSACTIONS (CONTINUED)
become due and payable immediately. At December 31, 1999, the note receivable
from related party was $75,000.

    In June 1998 and October 1998, the Company issued full recourse promissory
notes to certain officers for $200,000 and $500,000, respectively. The
promissory notes are collateralized by 200,000 and 362,319 shares of common
stock, bear annual interest at 8% and are payable in 1999, or earlier upon
employee termination. In May and June 1999, the Company repurchased the common
stock in exchange for the notes.

    In June 1999, the Company entered into an agreement with Garte &
Associates, Inc. pursuant to which the Company would pay Garte &
Associates, Inc. an investment banking fee for certain acquisitions. In 1999,
the Company paid a total of $256,000 to Garte & Associates, Inc. in connection
with the Company's acquisitions of Novalis Corporation and Finserv Health Care
Systems, Inc. in late 1999. Harvey Garte, the Company's Vice President of
Corporate Development and Investor Relations, is the sole stockholder of
Garte & Associates, Inc.

    In November 1999, in connection with the acquisition of Novalis, the Company
received notes receivable in the aggregate amount of $475,000 from eight former
stockholders of Novalis. The notes represent the former stockholders' agreement
to repay all legal, financial and accounting fees and expenses incurred in
connection with the acquisition. The note accrues interest at 8.0% per annum,
and is payable one year from the date of acquisition. At December 31, 1999, the
note receivable from related parties was $475,000.

6.  COMMITMENTS

    The Company leases office space and equipment under noncancelable operating
and capital leases with various expiration dates through 2006. Capital lease
obligations are collateralized by the equipment subject to the leases. The
Company is responsible for maintenance costs and property taxes on certain of
the operating leases. Rent expense for the years ended December 31, 1999 and
1998 and for the period from May 27, 1997 (date of inception) to December 31,
1997 was $1.2 million, $192,000 and $71,000, respectively. These amounts are net
of sublease income of $25,000, $48,000 and $36,000, respectively.

    Future minimum lease payments (exclusive of interest) under noncancelable
operating and capital leases at December 31, 1999 are as follows:

<TABLE>
<CAPTION>
FOR THE PERIODS ENDING DECEMBER 31,                           CAPITAL LEASES   OPERATING LEASES
-----------------------------------                           --------------   ----------------
                                                                       (IN THOUSANDS)
<S>                                                           <C>              <C>
  2000......................................................      $1,234           $ 2,729
  2001......................................................       1,172             2,735
  2002......................................................         676             2,452
  2003......................................................         212             1,822
  2004......................................................         164             1,410
Thereafter..................................................          --             1,391
                                                                  ------           -------
Total minimum lease payments................................       3,458           $12,539
                                                                                   =======
Less: Current portion.......................................       1,234
                                                                  ------
                                                                  $2,224
                                                                  ======
</TABLE>

                                      F-14
<PAGE>
                   THE TRIZETTO GROUP, INC. AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

7.  STOCKHOLDERS' EQUITY

COMMON STOCK

    In October 1999, the Company completed its initial public offering of
4,480,000 shares of common stock, including 630,000 shares in connection with
the exercise of underwriters' over-allotment option, at a price of $9.00 per
share, that raised approximately $36.0 million, net of underwriting discounts,
commissions and other offering costs. In addition, in connection with the
offering, 350,000 shares of common stock of the Company were sold by a selling
stockholder at $9.00 per share, for which the Company received no proceeds. Upon
the closing of the offering, all of the Company's mandatorily redeemable
convertible preferred stock converted into approximately 6,276,000 shares of
common stock.

    At December 31, 1999, the Company had reserved sufficient shares of common
stock for issuance upon conversion of preferred stock and exercise of stock
options. Common stockholders are entitled to dividends as and when declared by
the Board of Directors subject to the prior rights of the preferred
stockholders. The holders of each share of common stock are entitled to one
vote. The Company issued shares of its common stock to certain employees under
restricted stock agreements. These restricted stock agreements grant the Company
repurchase rights which lapse upon attainment of full vesting by all
stockholders. Full vesting is scheduled to occur on or before April 20, 2000. At
December 31, 1999 and 1998, 1,698,441 and 4,405,602 shares of common stock are
subject to repurchase by the Company, respectively.

MANDATORILY REDEEMABLE CONVERTIBLE PREFERRED STOCK

    In April and October 1998, the Company issued an aggregate of 4,545,454
shares of Series A mandatorily redeemable convertible preferred stock
("convertible preferred stock") at $1.43 per share for gross proceeds of
$6.5 million. In April 1999, the Company issued 1,730,770 shares of Series B
convertible preferred stock at $2.60 per share for gross proceeds of
$4.5 million. Upon the closing of the Company's initial public offering, all of
the Company's mandatorily redeemable convertible preferred stock converted into
approximately 6,276,000 shares of common stock.

STOCK OPTION PLAN

    In May 1998, the Company adopted the 1998 Stock Option Plan (the "Plan")
under which the Board of Directors may issue incentive and non-qualified stock
options to employees, directors and consultants. The Board of Directors has the
authority to determine to whom options will be granted, the number of shares,
the term and exercise price. Options are to be granted at an exercise price not
less than fair market value for incentive stock options or 85% of fair market
value for non-qualified stock options. For individuals holding more than 10% of
the voting rights of all classes of stock, the exercise price of incentive stock
options will not be less than 110% of fair market value. The options generally
vest and become exercisable annually at a rate of 25% of the option grant over a
four year period. The term of the options is no longer than five years for
incentive stock options for which the grantee owns greater than 10% of the
voting power of all classes of stock and no longer than ten years for all other
options.

                                      F-15
<PAGE>
                   THE TRIZETTO GROUP, INC. AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

7.  STOCKHOLDERS' EQUITY (CONTINUED)
    Activity under the Plan is as follows (in thousands, except per share data):

<TABLE>
<CAPTION>
                                                        SHARES                        OUTSTANDING OPTIONS
                                                       AVAILABLE                --------------------------------      WEIGHTED
                                                          FOR      NUMBER OF                           AGGREGATE      AVERAGE
                                                         GRANT       SHARES        EXERCISE PRICE        PRICE     EXERCISE PRICE
                                                       ---------   ----------   --------------------   ---------   --------------
<S>                                                    <C>         <C>          <C>                    <C>         <C>
Options reserved at Plan inception...................    1,600          --                       --          --           --
Granted..............................................   (1,159)      1,159      $     0.25 - $ 0.28     $   297        $0.26
Cancelled............................................       10         (10)     $              0.25          (2)        0.25
                                                        ------       -----                              -------
Balances, December 31, 1998..........................      451       1,149      $     0.25 - $ 0.28         295         0.26
Additional options reserved..........................    2,400
Granted..............................................   (2,620)      2,620      $     0.25 - $29.75      16,312         6.23
Exercised............................................       --         (60)     $              0.25         (15)        0.25
Cancelled............................................      204        (204)     $     0.25 - $ 1.00        (117)        0.57
                                                        ------       -----                              -------
Balances, December 31, 1999..........................      435       3,505      $      0.25--$29.75     $16,475        $4.70
                                                        ======       =====                              =======
</TABLE>

    The options outstanding and currently exercisable by exercise price at
December 31, 1999 are as follows (in thousands, except per share data):

<TABLE>
<CAPTION>
                                             OPTIONS OUTSTANDING AT DECEMBER 31, 1999              OPTIONS EXERCISABLE AT
                                      ------------------------------------------------------         DECEMBER 31, 1999
                                                      WEIGHTED AVERAGE          WEIGHTED       ------------------------------
RANGE OF                                NUMBER      REMAINING CONTRACTUAL   AVERAGE EXERCISE     NUMBER      WEIGHTED AVERAGE
EXERCISE PRICE                        OUTSTANDING       LIFE (YEARS)             PRICE         EXERCISABLE    EXERCISE PRICE
--------------                        -----------   ---------------------   ----------------   -----------   ----------------
<S>                                   <C>           <C>                     <C>                <C>           <C>
$0.25 - $2.60.......................     2,597               9.02                $ 0.79            239            $ 0.28
$6.50...............................       311               9.61                $ 6.50              2            $ 6.50
$14.50..............................       155               9.85                $14.50              1            $14.50
$20.25 - $29.75.....................       442               9.93                $23.01             --                --
                                         -----                                                    ----
                                         3,505               9.22                $ 4.70            242            $ 0.40
                                         =====                                                    ====
</TABLE>

STOCK-BASED COMPENSATION

    The Company has adopted the disclosure-only provisions of Statement of
Financial Accounting Standards No. 123 ("SFAS No. 123"), "Accounting for
Stock-Based Compensation." Had compensation cost for the Incentive Stock Plan
been determined based on the fair value at the grant date for awards during 1998
and the year ended December 31, 1999, consistent with the provisions of SFAS
No. 123, the Company's net income would have been as follows (in thousands,
except per share amounts):

<TABLE>
<CAPTION>
                                                                  YEAR ENDED
                                                                 DECEMBER 31,
                                                              -------------------
                                                                1999       1998
                                                              --------   --------
<S>                                                           <C>        <C>
Net income (loss), as reported..............................  $(7,927)    $  60
Net income (loss), pro forma................................  $(8,695)    $  54
Net income (loss) per share, as reported:
  Basic.....................................................  ($ 0.85)    $0.01
  Diluted...................................................  ($ 0.85)    $0.00
Net income (loss) per share, pro forma:
  Basic.....................................................  ($ 0.93)    $0.01
  Diluted...................................................  ($ 0.93)    $0.00
</TABLE>

                                      F-16
<PAGE>
                   THE TRIZETTO GROUP, INC. AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

7.  STOCKHOLDERS' EQUITY (CONTINUED)
    Such pro forma disclosures may not be representative of future compensation
cost because options vest over several years and additional grants are
anticipated to be made each year.

    At December 31, 1999 and December 31, 1998, options exercisable under the
Plan were 241,921 and none, respectively. The weighted average fair values of
options granted during 1999 and the year ended December 31, 1998 were $29.86 and
$0.05, respectively.

    The fair value of each option grant is estimated on the date of grant in
accordance with SFAS No. 123 with the following weighted average assumptions:

<TABLE>
<CAPTION>
                                                              DECEMBER 31,   DECEMBER 31,
                                                                  1999           1998
                                                              ------------   ------------
<S>                                                           <C>            <C>
Risk-free interest rate.....................................       6.34%          5.18%
Expected life...............................................    4 years        4 years
Expected dividends..........................................         --             --
Volatility..................................................       2.21           2.21
</TABLE>

EMPLOYEE STOCK PURCHASE PLAN

    In July 1999, the board of directors adopted the Employee Stock Purchase
Plan ("Stock Purchase Plan"). A total of 600,000 shares of common stock have
been reserved for issuance under the Stock Purchase Plan. Employees are eligible
to participate if they are employed for at least 20 hours per week and for more
than five months in any calendar year. Employees who own more than 5% of the
Company's outstanding stock may not participate. The Stock Purchase Plan permits
eligible employees to purchase common stock through payroll deductions, which
may not exceed the lesser of 15% of an employee's compensation or $25,000.

    The Stock Purchase Plan will be implemented by 12 month offerings with
purchases occurring at six month intervals commencing January 1, 2000. The
purchase price of the common stock under the Stock Purchase Plan will be equal
to 85% of the fair market value per share of common stock on either the start
date of the offering period or on the purchase date, whichever is less. In the
event of a proposed dissolution or liquidation of the Company, the offering
periods terminate immediately prior to the consummation of the proposed action,
unless otherwise provided by the Company's board of directors. The Employee
Stock Purchase Plan will terminate in 2009, unless terminated sooner by the
board of directors.

                                      F-17
<PAGE>
                   THE TRIZETTO GROUP, INC. AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

7.  STOCKHOLDERS' EQUITY (CONTINUED)

DEFERRED STOCK COMPENSATION

    As of December 31, 1999, the Company recorded deferred compensation related
to options granted to employees in the total amount of $6.9 million,
representing the difference between the deemed fair value of the common stock,
as determined for accounting purposes, and the exercise price of the options at
the date of grant. Of this amount, $1.1 million had been amortized in 1999, and
approximately $22,000 had been amortized in 1998. The Company amortizes deferred
compensation over the vesting period of the underlying option.

WARRANTS

    In connection with the acquisition of Croghan & Associates (Note 10), the
Company issued a warrant to purchase 162,595 shares of the Company's common
stock an exercise price of $0.80 per share to replace an existing warrant to
purchase Croghan & Associates stock. The value of the warrant determined using
the Black Scholes model was not material. In August 1999, the warrant to
purchase 162,595 shares of common stock was exercised.

8.  INCOME TAXES

    The provision for income taxes consists of the following (in thousands):

<TABLE>
<CAPTION>
                                                                                         FOR THE PERIOD
                                                                                          FROM MAY 27,
                                                                    YEAR ENDED                1997
                                                                   DECEMBER 31,        (DATE OF INCEPTION)
                                                              ----------------------     TO DECEMBER 31,
                                                                1999          1998            1997
                                                              --------      --------   -------------------
<S>                                                           <C>           <C>        <C>
Current
  Federal...................................................   $ (48)         $143             $156
  State.....................................................      22            22               23
                                                               -----          ----             ----
Net income (loss) per share.................................     (26)          165              179
                                                               -----          ----             ----
Deferred
  Federal...................................................    (164)          (71)             (91)
  State.....................................................     (23)          (12)             (14)
                                                               -----          ----             ----
                                                                (187)          (83)            (105)
                                                               -----          ----             ----
Total income tax provision (benefit)........................   $(213)         $ 82             $ 74
                                                               =====          ====             ====
</TABLE>

                                      F-18
<PAGE>
                   THE TRIZETTO GROUP, INC. AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

8.  INCOME TAXES (CONTINUED)
    The Company's effective tax rate differs from the statutory rate as shown in
the following schedule (in thousands):

<TABLE>
<CAPTION>
                                                                                      FOR THE PERIOD
                                                                  YEAR ENDED         FROM MAY 27, 1997
                                                                 DECEMBER 31,       (DATE OF INCEPTION)
                                                              -------------------     TO DECEMBER 31,
                                                                1999       1998            1997
                                                              --------   --------   -------------------
<S>                                                           <C>        <C>        <C>
Tax provision at federal statutory rate.....................  $(2,768)     $48              $60
State income taxes, net of federal benefit..................     (385)       7               10
Increase in valuation allowance.............................    1,355       --               --
Goodwill amortization.......................................      699       --               --
Deferred stock amortization.................................      412       --               --
Nondeductible items and other...............................      474       23                3
Other.......................................................       --        4                1
                                                              -------      ---              ---
Tax provision (benefit).....................................  $  (213)     $82              $74
                                                              =======      ===              ===
</TABLE>

    Temporary differences which gave rise to significant portions of deferred
tax assets and liabilities are as follows (in thousands):

<TABLE>
<CAPTION>
                                                                 DECEMBER 31,
                                                              -------------------
                                                                1999       1998
                                                              --------   --------
<S>                                                           <C>        <C>
Deferred tax assets:
  Net operating loss carryforwards..........................  $ 1,433     $  --
  Reserves and accruals.....................................      425       191
  Fixed assets..............................................       --        --
  Research credits..........................................       36        --
                                                              -------     -----
Deferred tax assets.........................................    1,894       191
                                                              -------     -----
Deferred tax liabilities:
  Deferred revenue..........................................       --      (374)
  Fixed assets..............................................     (446)       (3)
  Other.....................................................      (93)       --
                                                              -------     -----
Deferred tax liabilities....................................  $  (539)    $(377)
Valuation allowance.........................................   (1,355)       --
                                                              -------     -----
Net deferred taxes..........................................  $    --     $(186)
                                                              =======     =====
</TABLE>

    Tax loss carryforwards at December 31, 1999 are approximately $3.5 million
for federal purposes. The federal loss carryforward will expire in the fiscal
year ended 2019. Availability of the net operating loss carryforward may
potentially be reduced in the event of certain substantial changes in equity
ownership.

9.  EMPLOYEE BENEFIT PLAN

    In January 1998, the Company adopted a plan (the "Plan") which qualifies
under Section 401(k) of the Internal Revenue Code of 1986. Eligible employees
may make voluntary contributions to the Plan of up to 20% of their annual
compensation, not to exceed the statutory amount, and the Company may make
matching contributions. The Company has made no contributions since the Plan's
inception.

                                      F-19
<PAGE>
                   THE TRIZETTO GROUP, INC. AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

10.  ACQUISITIONS

    On October 1, 1997, the Company acquired all of the outstanding common stock
of Croghan & Associates, Inc. ("Croghan & Associates"). The total purchase price
was approximately $436,000, which consisted of 5,800,895 shares of the Company's
common stock. The acquisition has been accounted for as a purchase and results
of its operations have been included in the consolidated financial statements
from the date of acquisition.

    In February 1999, the Company acquired all of the outstanding shares of
Creative Business Solutions, Inc. ("Creative Business Solutions"), an Internet
solutions development company specializing in the integration of healthcare
information technology and contract programming solutions, and its majority
owned subsidiary, HealthWeb Systems, Ltd. ("HealthWeb"), an Internet software
and portal development company specializing in customized healthcare
applications. The Company also acquired the remaining minority interest in
HealthWeb. The acquisitions were accounted for using the purchase method of
accounting and accordingly, the purchase price was allocated to the tangible and
intangible assets acquired and liabilities assumed on the basis of their fair
market values on the acquisition date.

    The purchase price of approximately $3.3 million consisted of approximately
$1.4 million in cash, 655,000 shares of common stock, notes payable of $270,000,
assumed liabilities of $527,000 and acquisition costs of approximately $100,000.
Included in the 655,000 shares of common stock issued in the acquisition were
131,000 shares held in escrow to secure indemnification obligations of the
Creative Business Solutions and HealthWeb shareholders. Such shares, which will
be held in escrow for a two-year period, have been included in the purchase
price allocation. Based upon an appraisal by an independent valuation firm, the
value of the 655,000 shares of common stock issued in the acquisition was
determined to be $1.1 million. The excess of the purchase price over the fair
market value of the net tangible assets acquired aggregated approximately
$2.5 million, of which $484,000 was allocated to acquired in-process technology
and $2.1 million was allocated to goodwill and other intangible assets. An
independent appraisal was performed to determine the fair value of the
identifiable assets, including the portion of the purchase price attributed to
the acquired in-process technology. The income approach was used to value
acquired in-process technology, which includes an analysis of the completion
costs, cash flows, other required assets and risks associated with achieving
such cash flows. At the date of acquisition, the Company determined the
technological feasibility of HealthWeb's product was not established, and
accordingly, wrote-off the corresponding amount to acquired in-process
technology. HealthWeb is expected to introduce the final product by the end of
1999. Approximately $650,000 in research and development had been spent up to
the date of the acquisition in an effort to develop the technology to produce a
commercially viable product. The future research and development expense
associated with the acquired in-process product was estimated to be
approximately $975,000 between July 1999 and the first quarter of 2000.
Currently, the Company knows of no developments that would lead it to change its
original assessment of the expected completion and commercial viability of this
project. At the date of acquisition, the only identifiable intangible assets
acquired were the technology under development, the acquired workforce and
customer list.

    In April 1999, the Company acquired certain assets and liabilities from
Management and Technology Solutions, Inc. ("MTS") in exchange for 60,000 shares
of common stock. The assets included property and equipment, intellectual
property, trademarks and licenses, and computer software and software licenses.
As part of this transaction, the Company assumed liabilities consisting of lease
obligations, a note payable and certain other accrued liabilities.

                                      F-20
<PAGE>
                   THE TRIZETTO GROUP, INC. AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

10.  ACQUISITIONS (CONTINUED)
    In November 1999, the Company acquired all the outstanding shares of the
Novalis Corporation ("Novalis"). The purchase price of approximately
$18.7 million consisted of cash in the amount of approximately $5.0 million,
549,786 shares of common stock with a value of $16.37 per share, assumed
liabilities of $1.9 million and acquisition costs of approximately
$2.8 million. Of the total purchase price, $923,000 was allocated to in-process
technology and the remainder of the purchase price was allocated to assets
acquired and liabilities assumed. Of the 549,786 shares of common stock which
have been issued in connection with this acquisition, 366,524 shares of the
common stock have been held in escrow until the resolution of certain
pre-acquisition contingencies.

    The acquisition of Novalis was accounted for using the purchase method of
accounting. The excess of the purchase price over the fair market value of the
assets purchased and liabilities assumed was $13.5 million, of which $923,000
was allocated to acquired in-process technology, based upon an independent
appraisal, and was written-off in the year ended December 31, 1999, and
$12.6 million was allocated to goodwill and intangible assets consisting of
assembled workforce, core technology and customer lists. As of the acquisition
date, Novalis was developing several enhancements to its proprietary software
products. Approximately $535,000 in research and development had been spent up
to the date of the acquisition in an effort to develop the next releases of the
in-process and core technology. The future research and development expense
associated with the in-process and core technology was estimated to be
approximately $490,000. The in-process and core technology was scheduled to be
released by June 30, 2000.

    In valuing Novalis' developed, in-process and core technologies, the Company
utilized the relief from royalty method. The relief from royalty method assumes
that the value of the intangible asset is estimated by quantifying the royalties
saved due to our ownership of the software. A revenue stream for the asset was
estimated based on Novalis' total revenue projections over its estimated life.
An appropriate royalty rate is then applied to the forecasted revenue to
estimate the pre-tax income associated with the asset. This income stream was
tax effected and discounted to its present value to estimate the value of the
developed, in-process and core technologies. For purposes of this analysis, the
Company used 15%, 20% and 25% discount rates for the developed, in-process and
core technologies, respectively. These discount rates are consistent with the
risks inherent in achieving the projected cash flows.

    In December 1999, the Company acquired all of the outstanding shares of
Finserv HealthCare Systems, Inc. ("Finserv"). The acquisition was accounted for
using the purchase method of accounting and accordingly, the purchase price was
allocated to the tangible and intangible assets acquired and liabilities assumed
on the basis of their fair market values on the acquisition date. The purchase
price of approximately $4.8 million consisted of cash in the amount of
approximately $1.8 million, 48,998 shares of common stock with a value of $30.61
per share, assumed liabilities of $1.1 million, and acquisition costs of
approximately $0.4 million. The agreement also provides that an additional
amount of shares, up to $750,000 in shares (the "earnout consideration"), may be
issued to the Finserv Securityholders if certain milestones are achieved for the
fiscal years ending December 31, 2000 and 2001. Of the 48,998 shares of common
stock which have been issued in connection with this acquisition, 20,000 shares
of common stock have been held in escrow until the resolution of certain
pre-acquisition contingencies. The purchase price has been allocated to the
assets acquired and liabilities assumed and the remainder has been allocated to
unidentifiable goodwill.

                                      F-21
<PAGE>
                   THE TRIZETTO GROUP, INC. AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

10.  ACQUISITIONS (CONTINUED)
    The purchase price allocations were based on the estimated fair value of the
assets, less liabilities, on the date of purchases as follows (in thousands):

<TABLE>
<CAPTION>
                                                           CROGHAN     CREATIVE
                                                              &        BUSINESS
                                                          ASSOCIATES   SOLUTIONS   NOVALIS    FINSERV
                                                          ----------   ---------   --------   --------
<S>                                                       <C>          <C>         <C>        <C>
Total current assets....................................    $1,236      $  596     $ 2,251     $  827
Property, plant, equipment and other noncurrent
  assets................................................       511         175       2,795        276
Goodwill................................................        --       1,338       3,277      3,656
Other intangible assets.................................        --         726       9,427         --
Acquired in-process technology..........................        --         484         923         --
Total liabilities.......................................    (1,311)         --          --         --
                                                            ------      ------     -------     ------
  Total purchase price..................................    $  436      $3,319     $18,673     $4,759
                                                            ======      ======     =======     ======
</TABLE>

    The following unaudited pro forma summary presents the consolidated results
of operations of the Company as if the acquisition of Croghan & Associates had
occurred on May 27, 1997, the date of inception for the Company (in thousands,
except per share data):

<TABLE>
<CAPTION>
                                                                FOR THE PERIOD
                                                                 FROM MAY 27,
                                                                     1997
                                                              (DATE OF INCEPTION)
                                                                TO DECEMBER 31,
                                                                     1997
                                                              -------------------
<S>                                                           <C>
Net revenue.................................................         $4,244
Net loss before extraordinary item..........................         $ (880)
Net income..................................................         $  120
Pro forma earnings per share:
  Basic.....................................................         $ 0.06
  Diluted...................................................         $ 0.03
</TABLE>

    The following unaudited pro forma summary presents the consolidated results
of operations of the Company as if the acquisition of Creative Business
Solutions, Novalis Corporation and Finserv occurred on January 1, 1998, giving
effect to an acquisition adjustment for amortization of goodwill and other
intangibles and the write-off of acquired in-process technology (in thousands,
except per share data):

<TABLE>
<CAPTION>
                                                                 YEAR ENDED
                                                              DECEMBER 31, 1998
                                                              -----------------
<S>                                                           <C>
Net revenue.................................................      $ 39,312
Net loss....................................................      $(10,510)
Pro forma earnings per share, basic and diluted.............      $  (1.70)
</TABLE>

<TABLE>
<CAPTION>
                                                                 YEAR ENDED
                                                              DECEMBER 31, 1999
                                                              -----------------
<S>                                                           <C>
Net Revenue.................................................      $ 58,706
Net loss....................................................      $(15,177)
Pro forma earnings per share, basic and diluted.............      $  (1.43)
</TABLE>

    The pro forma results are not necessarily indicative of what actually would
have occurred if the acquisitions had been in effect for the entire period
presented. In addition, they are not intended to be a projection of future
results.

                                      F-22
<PAGE>
                   THE TRIZETTO GROUP, INC. AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

11.  SUPPLEMENTAL CASH FLOW DISCLOSURES

<TABLE>
<CAPTION>
                                                                                                                FOR THE PERIOD
                                                                 FOR THE SIX              FOR THE YEAR           FROM MAY 27,
                                                                 MONTHS ENDED                ENDED                   1997
                                                                   JUNE 30,               DECEMBER 31,        (DATE OF INCEPTION)
                                                            ----------------------   ----------------------     TO DECEMBER 31,
                                                              2000          1999       1999          1998            1997
                                                            --------      --------   --------      --------   -------------------
<S>                                                         <C>           <C>        <C>           <C>        <C>
SUPPLEMENTAL DISCLOSURES FOR CASH FLOW INFORMATION
Cash paid for interest....................................   $  220        $   99     $  120         $ 59             $  2
Cash paid for income taxes................................       --            33         42          705               43
NONCASH INVESTING AND FINANCING ACTIVITIES
Common stock issued for notes receivable..................       --            --         --           --               13
Common stock issued for Croghan & Associates..............       --            --         --           --              436
Assets acquired through capital lease.....................      175         1,484      3,550          167               --
Deferred stock compensation...............................      892         5,817      6,383          482               --
Common stock issued for notes receivable..................       --            --         --           53               --
Issuance of notes payable to acquire software and software
  license.................................................       --         1,690      1,690           --               --
Common stock issued for Creative Business Solutions.......       --            --      1,146           --               --
Notes payable issued for Creative Business Solutions......       --           270        270           --               --
Repurchase of shares in exchange for stockholder notes
  receivable..............................................       --           700        700           --               --
Common stock issued to purchase assets of Management and
  Technology Solutions, Inc...............................       --           140        140           --               --
Exercise of common stock warrants.........................       --            --        130           --               --
Common stock issued to purchase assets of Novalis
  Corporation.............................................       --            --      8,999           --               --
Common stock issued to purchase assets of Finserv
  Healthcare Systems, Inc.................................       --            --      1,499           --               --
Common stock issed to purchase assets of Healthcare Media
  Enterprises.............................................    3,500            --         --           --               --
</TABLE>

12.  SEGMENT INFORMATION

   The Company has adopted SFAS No. 131, "Disclosures about Segments of an
Enterprise and Related Information." SFAS 131 requires enterprises to report
information about operating segments in annual financial statements and selected
information about reportable segments in interim financial reports issued to
shareholders. It also establishes standards for related disclosures about
products and services, geographic areas and major customers.

    The Company operates in two business segments: recurring or multi-year
contractually based revenue, and revenue generated via non-recurring agreements.
The recurring business is subscription based and provides customers with a
portion, or all, of their information technology and related business service
needs. The consulting business provides customers with solutions to their
connectivity and integration needs as well as technical support on an as needed
basis.

    The Company evaluates performance and allocates resources based on gross
margin. The accounting policies of the reportable segments are the same as those
described in the summary of significant accounting policies.

    The Company's reportable segments are business units that are organized
primarily by the nature of services provided. The reportable segments are
managed separately because of the difference in marketing strategies, customer
base, and client approach. Financial information about segments is reported in
the consolidated statements of operations.

                                      F-23
<PAGE>
                   THE TRIZETTO GROUP, INC. AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

12.  SEGMENT INFORMATION (CONTINUED)
    The Company's assets are all located in the United States, and all sales
were to customers located in the United States.

13.  SUBSEQUENT EVENTS

RECENT DEVELOPMENTS

    On March 28, 2000, the Company entered into an Agreement and Plan of
Reorganization with IMS Health Incorporated, a Delaware corporation, under which
IMS HEALTH will merge with and into the Company. At the closing, we will issue
 .4655 shares of the Company's Common Stock for each share of outstanding common
stock of IMS HEALTH. On the date of signing, the transaction was valued at
approximately $8.6 billion. Consummation of the merger is subject to the
approval of each company's stockholders as well as various third parties and
federal agencies.

    In January 2000, the Company acquired all of the outstanding shares of
Healthcare Media Enterprises, Inc. Healthcare Media Enterprises' primary
business focus is on software development, especially relating to the Internet,
web design, and business to business portals. The acquisition was accounted for
using the purchase method of accounting and accordingly, the purchase price was
allocated to the tangible and intangible assets acquired and liabilities assumed
on the basis of their fair market values on the acquisition date. The purchase
price of approximately $5.8 million consisted of cash in the amount of
approximately $1.6 million, 87,359 shares of common stock with a value of $40.06
per share, assumed liabilities of $625,000 and acquisition costs of
approximately $100,000.

14.  SUBSEQUENT EVENTS (UNAUDITED)

    On May 16, 2000, we entered into an Agreement and Plan of Reorganization
with Elbejay Acquisition Corp. ("Elbejay") a wholly-owned subsidiary of
TriZetto, IMS Health Incorporated, and ERISCO Managed Care Technologies, Inc.
("ERISCO") pursuant to which ERISCO will merge with and into Elbejay resulting
in ERISCO becoming a wholly-owned subsidiary of TriZetto. TriZetto will issue
shares of common stock of TriZetto, par value $0.001 per share (the "TriZetto
Common Stock"), having a value of $255 million to IMS. The final exchange ratio
will be determined based upon the average daily price of TriZetto Common Stock
for the 15 trading days ending on the third day prior to the Closing Date,
except that TriZetto will not issue less than 8.8 million shares nor more than
12.1 million shares of TriZetto Common Stock. By execution of the Merger
Agreement, IMS and TriZetto agreed to terminate the Agreement and Plan of
Reorganization, dated as of March 28, 2000, between IMS and TriZetto that
provided for the merger of IMS with and into TriZetto.

    On June 29, 2000, TriZetto's stockholders approved an amendment to
TriZetto's 1998 Stock Option Plan which increased the authorized number of
shares of common stock issuable thereunder by 3,200,000 shares and reserved the
additional shares for issuance under the 1998 Plan, bringing the total number of
shares of common stock subject to the 1998 Plan to 7,200,000.

                                      F-24
<PAGE>
                       REPORT OF INDEPENDENT ACCOUNTANTS

To the Shareholder of ERISCO Managed Care Technologies, Inc.:

    In our opinion, the accompanying statements of financial position and the
related statements of income, Shareholder's equity and cash flows present
fairly, in all material respects, the financial position of ERISCO Managed Care
Technologies, Inc., a wholly owned subsidiary of IMS Health Incorporated, at
December 31, 1999 and 1998, and the results of its operations and its cash flows
for each of the three years in the period ended December 31, 1999, in conformity
with accounting principles generally accepted in the United States. These
financial statements are the responsibility of the Company's management; our
responsibility is to express an opinion on these financial statements based on
our audits. We conducted our audits of these financial statements in accordance
with auditing standards generally accepted in the United States which require
that we plan and perform the audit to obtain reasonable assurance about whether
the financial statements are free of material misstatement. An audit includes
examining, on a test basis, evidence supporting the amounts and disclosures in
the financial statements, assessing the accounting principles used and
significant estimates made by management, and evaluating the overall financial
statement presentation. We believe that our audits provide a reasonable basis
for the opinion expressed above.

                                          PRICEWATERHOUSECOOPERS LLP

New York, New York
June 30, 2000

                                      F-25
<PAGE>
                    ERISCO MANAGED CARE TECHNOLOGIES, INC.,

              A WHOLLY OWNED SUBSIDIARY OF IMS HEALTH INCORPORATED

                              STATEMENTS OF INCOME

                         (DOLLAR AMOUNTS IN THOUSANDS)

<TABLE>
<CAPTION>
                                                                  SIX MONTHS
                                                                ENDED JUNE 30,         YEARS ENDED DECEMBER 31,
                                                              -------------------   ------------------------------
                                                                2000       1999       1999       1997       1998
                                                              --------   --------   --------   --------   --------
                                                                  (UNAUDITED)
<S>                                                           <C>        <C>        <C>        <C>        <C>
Revenue
Software Licenses...........................................   $7,831     $6,999    $15,946    $12,539    $12,116
Software Maintenance........................................    9,207      9,536     19,357     14,784     12,895
Services....................................................    6,858      5,952     12,428      9,848      7,528
Other.......................................................      606      1,202      1,576      1,256      1,532
                                                               ------     ------    -------    -------    -------
  Total Revenue.............................................   24,502     23,689     49,307     38,427     34,071
  Cost of Revenue...........................................   14,978     14,276     29,068     25,760     21,514
                                                               ------     ------    -------    -------    -------
  Gross Profit..............................................    9,524      9,413     20,239     12,667     12,557
                                                               ------     ------    -------    -------    -------
Operating Expenses:
Research and Development....................................    1,923      1,305      2,496      1,514        888
Selling, General and Administrative.........................    5,073      4,062      7,481      6,567      5,267
Depreciation and Amortization...............................      581        635      1,239        912        769
                                                               ------     ------    -------    -------    -------
  Total Operating Expenses..................................    7,577      6,002     11,216      8,993      6,924
                                                               ------     ------    -------    -------    -------
  Operating Income..........................................    1,947      3,411      9,023      3,674      5,633
Related Party Interest Expense..............................   (1,712)    (1,329)    (2,875)    (2,761)    (2,044)
Other Income (Expense)......................................        0          0        125        (64)       (51)
                                                               ------     ------    -------    -------    -------
  Income before provision for Income taxes..................      235      2,082      6,273        849      3,538
Income tax provision........................................       99        897      2,704        389      1,507
                                                               ------     ------    -------    -------    -------
  Net Income................................................   $  136     $1,185    $ 3,569    $   460    $ 2,031
                                                               ======     ======    =======    =======    =======
</TABLE>

    The accompanying notes are an integral part of the financial statements.

                                      F-26
<PAGE>
                    ERISCO MANAGED CARE TECHNOLOGIES, INC.,

              A WHOLLY OWNED SUBSIDIARY OF IMS HEALTH INCORPORATED

                        STATEMENTS OF FINANCIAL POSITION

                         (DOLLAR AMOUNTS IN THOUSANDS)

<TABLE>
<CAPTION>
                                                                AS OF               AS OF               AS OF
                                                            JUNE 30, 2000     DECEMBER 31, 1999   DECEMBER 31, 1998
                                                          -----------------   -----------------   -----------------
                                                             (UNAUDITED)
<S>                                                       <C>                 <C>                 <C>
ASSETS
Current assets
Cash and Cash Equivalents...............................       $     0             $     0            $      0
Accounts Receivable--Net................................         2,518               2,924               2,322
Deferred Income Tax.....................................           125                 213                 231
Prepaid Expenses and Other Current Assets...............         1,486               2,002               2,830
Due From Parent.........................................        34,921              28,471              25,941
                                                               -------             -------            --------
    Total Current Assets................................        39,050              33,610              31,324
                                                               -------             -------            --------
Computer Software.......................................         7,029               7,267               7,176
Property and Equipment--Net.............................         4,470               4,413               1,430
                                                               -------             -------            --------
Total assets............................................       $50,549             $45,290            $ 39,930
                                                               =======             =======            ========
LIABILITIES AND SHAREHOLDER'S EQUITY
Current Liabilities
Deferred Revenues.......................................       $14,821             $11,658            $ 12,984
Accrued and Other Current Liabilities...................         4,706               4,602               3,960
Accounts Payable........................................           272                 337                 404
Note Payable and Accrued Interest Related Party.........             0              53,319              50,444
                                                               -------             -------            --------
    Total Current Liabilities...........................        19,799              69,916              67,792
                                                               -------             -------            --------
Deferred Income Taxes...................................         2,217               2,197               2,472
Other Non-current Liabilities...........................           886                 700                 758
                                                               -------             -------            --------
Total Liabilities.......................................        22,902              72,813              71,022
                                                               -------             -------            --------
  Commitments and Contingencies (notes 8, 9 and 10)
Shareholder's Equity:
  Common stock, No Par Value; Authorized 200 shares;
    issued 10 shares in all periods.....................        57,061               2,027               2,027
  Retained Earnings.....................................       (29,414)            (29,550)            (33,119)
                                                               -------             -------            --------
Total Shareholder's Equity..............................        27,647             (27,523)            (31,092)
                                                               -------             -------            --------
Total Liabilities and Shareholder's Equity..............       $50,549             $45,290            $ 39,930
                                                               =======             =======            ========
</TABLE>

    The accompanying notes are an integral part of the financial statements.

                                      F-27
<PAGE>
                    ERISCO MANAGED CARE TECHNOLOGIES, INC.,
              A WHOLLY OWNED SUBSIDIARY OF IMS HEALTH INCORPORATED

                            STATEMENTS OF CASH FLOWS
                         (DOLLAR AMOUNTS IN THOUSANDS)

<TABLE>
<CAPTION>
                                                               SIX MONTHS ENDED              YEARS ENDED
                                                                   JUNE 30,                  DECEMBER 31,
                                                              -------------------   ------------------------------
                                                                2000       1999       1999       1998       1997
                                                              --------   --------   --------   --------   --------
                                                                  (UNAUDITED)
<S>                                                           <C>        <C>        <C>        <C>        <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income..................................................  $    136   $ 1,185    $ 3,569    $    460   $ 2,031
Adjustments to reconcile net income to cash provided by
  operating activities:
  Depreciation and Amortization.............................     1,721     1,888      3,796       3,741     3,465
  Changes in Working Capital:
  Accrued and Other Liabilities.............................       290       204        584       1,272      (116)
  Deferred Revenues.........................................     3,163     7,031     (1,326)      4,812      (549)
  Accounts Receivable.......................................       406    (4,566)      (602)      1,548     3,169
  Accounts Payable..........................................       (65)      (35)       (67)        185        95
  Accrued Interest, Related Party...........................     1,712     1,329      2,875       2,761     2,044
  Deferred Income Taxes.....................................       108      (200)      (257)        415       170
  Other Current Assets......................................       516       273        828          90    (2,571)
                                                              --------   -------    -------    --------   -------
Net Cash Provided By (Used In) Operating Activities.........     7,987     7,109      9,400      15,284     7,738
                                                              --------   -------    -------    --------   -------
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital Expenditures........................................      (637)   (3,270)    (4,225)     (1,018)     (489)
Additions To Computer Software..............................      (900)   (1,200)    (2,645)     (2,988)   (2,764)
                                                              --------   -------    -------    --------   -------
Net Cash Used In Investing Activities.......................    (1,537)   (4,470)    (6,870)     (4,006)   (3,253)
                                                              --------   -------    -------    --------   -------
NET CASH FLOWS FROM FINANCING ACTIVITIES:
Net Transfers (To) IMS HEALTH...............................    (6,450)   (2,639)    (2,530)     (9,556)   (6,207)
Capital Contribution from Parent............................    55,034         0          0           0         0
Repayment of Note Payable, Related Party....................   (55,034)        0          0           0         0
Short-Term Borrowings.......................................         0         0          0           0     2,232
Short-Term Debt Repayments..................................         0         0          0      (1,722)     (510)
                                                              --------   -------    -------    --------   -------
Net Cash Provided By (Used In) Financing Activities.........    (6,450)   (2,639)    (2,530)    (11,278)   (4,485)
                                                              --------   -------    -------    --------   -------
Increase/(Decrease) In Cash.................................         0         0          0           0         0
Cash, Beginning Of Period...................................         0         0          0           0         0
                                                              --------   -------    -------    --------   -------
Cash, End Of Period.........................................  $      0   $     0    $     0    $      0   $     0
                                                              ========   =======    =======    ========   =======
</TABLE>

    The accompanying notes are an integral part of the financial statements.

                                      F-28
<PAGE>
                    ERISCO MANAGED CARE TECHNOLOGIES, INC.,
              A WHOLLY OWNED SUBSIDIARY OF IMS HEALTH INCORPORATED

                       STATEMENTS OF SHAREHOLDER'S EQUITY
                  (DOLLAR AMOUNTS IN THOUSANDS, EXCEPT SHARES)

<TABLE>
<CAPTION>
                                                         SHARES        COMMON     CAPITAL IN     RETAINED
                                                      COMMON STOCK     STOCK     EXCESS OF PAR   EARNINGS    TOTAL
                                                     --------------   --------   -------------   --------   --------
<S>                                                  <C>              <C>        <C>             <C>        <C>
January 1, 1997....................................        10            $0         $ 2,027      $(35,610)  $(33,583)
Net Income.........................................                                                2,031       2,031
                                                           --            --         -------      --------   --------
December 31, 1997..................................        10             0         $ 2,027      $(33,579)  $(31,552)
Net Income.........................................                                                  460         460
                                                           --            --         -------      --------   --------
December 31, 1998..................................        10             0         $ 2,027      $(33,119)  $(31,092)
Net Income.........................................                                                3,569       3,569
                                                           --            --         -------      --------   --------
December 31, 1999..................................        10             0         $ 2,027      $(29,550)  $(27,523)
Capital Contribution from Parent...................                                  55,034                   55,034
Net Income.........................................                                                  136         136
                                                           --            --         -------      --------   --------
June 30, 2000 (Unaudited)..........................        10            $0         $57,061      $(29,414)  $ 27,647
                                                           ==            ==         =======      ========   ========
</TABLE>

    The accompanying notes are an integral part of the financial statements.

                                      F-29
<PAGE>
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

                     ERISCO MANAGED CARE TECHNOLOGIES, INC.

                  (DOLLAR AMOUNTS IN THOUSANDS, EXCEPT SHARES)

NOTE 1.  ORGANIZATION AND BASIS OF PRESENTATION

    ERISCO Managed Care Technologies, Inc. ("Erisco" or the "Company") is a
wholly owned subsidiary of IMS HEALTH Inc. ("IMS HEALTH" or the "Parent").
Acquired in 1984 by The Dun & Bradstreet Corporation ("D&B"), Erisco has been
providing software-based application business solutions and services for over
thirty years. Erisco markets its applications to the healthcare insurance
industry, including managed care organizations (MCO's), preferred provider
organizations, Blue Cross/ Blue Shield organizations, managed-indemnity carriers
and specialized MCO's.

    IMS HEALTH became a separate public company through a series of
transactions, as discussed below.

    On November 1, 1996, D&B distributed to its shareholders all of the
outstanding shares of common stock of Cognizant Corporation ("Cognizant"), then
a wholly-owned subsidiary of D&B (the "D&B Distribution"). In the D&B
Distribution, holders of D&B common stock received one share of Cognizant common
stock for every share of D&B common stock held.

    In July 1998, Cognizant separated into two independent, publicly traded
companies--Nielsen Media Research, Inc. ("NMR"), and IMS HEALTH (the "Cognizant
Distribution"). The transaction was structured as a tax-free dividend of one
share of IMS HEALTH common stock for each share of Cognizant common stock.
Concurrent with the transaction, Cognizant changed its name to Nielsen Media
Research, Inc. The Cognizant Distribution created IMS HEALTH, a premier global
provider of information solutions to the pharmaceutical and healthcare
industries, and NMR, a leader in television audience measurement services.

    The financial statements have been prepared using IMS's historical basis in
the assets and liabilities and historical results of operations related to the
Company's business. The financial statements generally reflect the financial
position, results of operations, and cash flows of the Company as if it were a
separate entity for all periods presented. The financial statements include
allocations of certain IMS Corporate and other expenses (including cash
management, legal, accounting, tax, employee benefits, insurance services, data
services and other corporate overhead) relating to the Company's business for
the years ended December 31, 1999, 1998, and 1997 (the "Respective Periods") and
the (unaudited) three and six months ended June 30, 2000 and 1999 period.
Management believes these allocation methods are reasonable. The financial
information included herein may not necessarily reflect the financial position,
results of operations, and cash flows of the Company in the future or what they
would have been if they Company had been a separate entity during the periods
presented.

    The financial statements are presented immediately prior to the divestiture
Agreement discussed in Note 13 and do not reflect any decisions that may be made
by the buyer.

NOTE 2.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

    UNAUDITED INTERIM FINANCIAL INFORMATION: The accompanying interim statement
of financial position as of June 30, 2000 and the statements of income and cash
flows for the six months ended June 30, 2000 and 1999, together with the related
disclosures and amounts set forth in the notes are unaudited. In management's
opinion all adjustments of normal recurring nature, which the Company considers
necessary to present fairly, in all material respects, its financial position,
results of income and cash flows for the periods have been included. Unaudited
results for the six months ended June 30, 2000 and 1999 are not necessarily
indicative of results for the entire year.

                                      F-30
<PAGE>
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

                     ERISCO MANAGED CARE TECHNOLOGIES, INC.

                  (DOLLAR AMOUNTS IN THOUSANDS, EXCEPT SHARES)

NOTE 2.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
    CASH AND CASH EQUIVALENTS: The Company participates in IMS HEALTH's cash
management program and as such, all cash is swept to IMS HEALTH daily. In
addition, IMS funds the Company's disbursement bank accounts as required. This
activity is included in Due from Parent.

    PROPERTY AND EQUIPMENT: Machinery and Equipment are depreciated over their
estimated useful lives of 3 to 5 years, using the straight-line method.
Furniture and fixtures are depreciated on a straight-line basis over their
estimated useful life of 10 years. Leasehold improvements are amortized on a
straight-line basis over the shorter of the term of the lease or the estimated
useful life of the improvement. Maintenance and repairs are charged to expense
as incurred. Upon retirement or sale, the costs of the assets disposed and the
related accumulated depreciation are removed from the accounts and any resulting
gain or loss is included in the determination of operating results.

    COMPUTER SOFTWARE: Direct costs incurred in the development of computer
software are capitalized in accordance with Statement of Financial Accounting
Standards ("SFAS") No. 86, "Accounting for the Costs of Computer Software to be
Sold, Leased or Otherwise Marketed". Research and development costs incurred to
establish technological feasibility of a computer software product are expensed
in the periods in which they are incurred and are included in cost of research
and development in the Statement of Income. Capitalization ceases and
amortization starts when the product is available for general release to
customers. Computer Software is being amortized, on a product by product basis,
over five years. At each balance sheet date the Company reviews the
recoverability of the unamortized capitalized costs of computer software by
comparing the carrying value of computer software with its estimated net
realizable value. Accumulated amortization of computer software was $7,455 and
$8,304 at December 31, 1999 and 1998, respectively.

    COMPUTER SOFTWARE PURCHASED FOR INTERNAL USE: The Company follows SOP-98-1,
"Accounting for the Costs of Computer Software Developed or Obtained for
Internal Use" to account for purchased computer software used in its operations.

    REVENUE RECOGNITION: The Company generates revenue from several sources,
including the licensing of its software products, maintenance, performing
services related to the implementation, training and support and minor
modifications to these products, and other revenues principally from commissions
related to the reselling of hardware and third party software products. The
Company follows the provisions of AICPA Statements of Position ("SOP") 97-2
"Software Revenue Recognition," SOP 98-4 "Deferral of the Effective Date of
Certain Provisions of SOP 97-2", and SOP 98-9 "Modification of SOP 97-2,
Software Revenue Recognition, With Respect to Certain Transactions".

    Software license revenue is recognized upon the execution of a license
agreement, when the licensed product has been delivered, fees are fixed and
determinable, collectibility is reasonably assured and when all other
significant obligations have been fulfilled. For software license agreements in
which customer acceptance is a condition of earning the license fees, revenue is
not recognized until acceptance occurs. For arrangements containing multiple
elements, such as software license fees, consulting services and maintenance,
and where vendor-specific objective evidence ("VSOE") of fair value exists for
all undelivered elements, the Company accounts for the delivered elements in
accordance with the "residual method" prescribed by SOP 98-9. For arrangements
in which VSOE does not exist for each element, including specified upgrades,
revenue is deferred and not recognized until delivery of the element without
VSOE has occurred.

                                      F-31
<PAGE>
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

                     ERISCO MANAGED CARE TECHNOLOGIES, INC.

                  (DOLLAR AMOUNTS IN THOUSANDS, EXCEPT SHARES)

NOTE 2.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
    Software maintenance and support revenues are deferred and recognized
ratably over the contract period.

    Service revenue includes consulting fees for implementation, installation,
data conversion, and training related to the use of the Company's licensed
products. The Company recognizes revenues for these services as they are
performed, as they are principally contracted for on a time and material basis.
Also included in services is revenue generated through the Company's service
bureau operation and through the development of modifications for clients.
Service bureau revenue is earned and recognized based on actual usage, as the
service is performed. Revenue from minor modifications is recognized upon
delivery.

    Other revenue consists primarily of commissions earned from the reselling of
hardware and third party software products.

    DEFERRED REVENUES: Deferred revenues arise primarily as a result of annual
billings of software maintenance fees at the beginning of maintenance terms and
billings of software license fees in accordance with contractual terms that may
not directly correlate with the delivery of the product or services. In
addition, upfront and other annual fees are deferred and recognized over the
service period. The amount of deferred revenue will change based on the timing
of actual billings and related recognition of software license and maintenance
revenues.

    Unbilled accounts receivable arise as a result of revenue earned under
contractual arrangements for products delivered or services rendered prior to
the related billings to customers. The Company generally bills the customer
within a quarter.

    INCOME TAXES: The results of the Company have been included in the Federal
and certain state tax returns of IMS and Cognizant for the Respective Periods.
The provision for income taxes in the Company's financial statements has been
calculated on a separate-company basis. Income taxes deemed paid on behalf of
the Company by IMS HEALTH for the Respective Periods are included in Due from
Parent.

    Income taxes are provided using the asset and liability method in accordance
with SFAS No. 109. Deferred tax assets and liabilities are recognized based on
the estimated realizable differences between the book and tax bases of assets
and liabilities using presently enacted tax rates. The provision for income
taxes is the sum of the amount of income tax paid or payable for the year, as
determined by applying the provisions of enacted tax laws to taxable income for
that year and the net changes during the year in the Company's deferred tax
assets and liabilities.

    ESTIMATES: The preparation of financial statements in conformity with
generally accepted accounting principles requires management to make estimates
and assumptions that affect the reported amounts of assets, liabilities,
revenues and expenses and the disclosure of contingent assets and liabilities.
Actual results could differ from those estimates. Estimates are used for, but
not limited to, the accounting for: allowance for uncollectible accounts
receivable, depreciation and amortization periods, capitalized software, income
taxes, and allocations of IMS Corporate and other costs.

                                      F-32
<PAGE>
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

                     ERISCO MANAGED CARE TECHNOLOGIES, INC.

NOTE 2.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)

    COMPREHENSIVE INCOME (LOSS): The Company adopted SFAS No. 130, REPORTING
COMPREHENSIVE INCOME effective January 1, 1998. SFAS No. 130 establishes
standards for the reporting and disclosure of comprehensive income (loss) and
its components. Comprehensive income (loss) includes all changes in equity
during a period except those resulting from investments by or distributions to
owners.

    For the years ended December 31, 1999, 1998, and 1997, the Company had no
other significant components of other comprehensive income (loss). Accordingly,
comprehensive income and net income were the same for these periods.

    RECENTLY ISSUED ACCOUNTING STANDARDS: In March 2000, the Financial
Accounting Standards Board issued Interpretation No. 44 "Accounting for Certain
Transactions Involving Stock Compensation, an interpretation of APB Opinion
No. 25" ("FIN No. 44"). The interpretation provides guidance for certain issues
relating to stock compensation, involving employees that arose in applying
Opinion 25. The provisions of FIN No. 44 are effective July 1, 2000. The
adoption of FIN No. 44 will have no effect on the Company's financial
statements.

    In December 1999, the Securities and Exchange Commission ("SEC") issued
Staff Accounting Bulletin No. 101 "Revenue Recognition in Financial Statements"
("SAB No. 101"). SAB No. 101 summarizes certain of the SEC staff's views in
applying generally accepted accounting principles to revenue recognition in
financial statements. On June 26, 2000, the SEC staff issued SAB 101B to provide
registrants with additional time to implement guidance contained in SAB 101. SAB
101B delays the implementation date of SAB No. 101 until no later than the
fourth fiscal quarter of fiscal years beginning after December 15, 1999. The
Company believes its revenue recognition policies are compliant with the SEC
staff's views.

NOTE 3.  FINANCIAL INSTRUMENTS

FAIR VALUE OF FINANCIAL INSTRUMENTS

    At December 31, 1999, the Company's financial instruments included
receivables, accounts payable and related party notes and accounts. At
December 31, 1999, the fair values of these instruments approximated carrying
values due to their short-term nature.

CREDIT CONCENTRATIONS

    The Company generates all its revenues and maintains accounts receivable
balances principally from customers in the healthcare insurance industry. The
Company's trade receivables do not represent significant concentrations of
credit risk at December 31, 1999 due to the high quality of its customers. These
receivable balances are unsecured. The Company believes its allowances for
doubtful accounts is sufficient to provide for any risk of credit losses.

NOTE 4.  PENSION AND POSTRETIREMENT BENEFITS

    Certain eligible employees of the company participate in IMS HEALTH's
defined benefit pension plan. The plan is a cash balance pension plan under
which 6% of creditable compensation plus interest is credited to eligible
employee's retirement accounts on a monthly basis. At the time of retirement,
the vested employee's account balance is actuarially converted into an annuity.
The Company accounts for

                                      F-33
<PAGE>
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

                     ERISCO MANAGED CARE TECHNOLOGIES, INC.

NOTE 4.  PENSION AND POSTRETIREMENT BENEFITS (CONTINUED)
the plan as a multi-employer plan. Accordingly, the Company has recorded pension
expense related to its employees participation in the IMS HEALTH plan, as
allocated, totaling $258, $225, and $212 for the years 1999, 1998, and 1997,
respectively.

    All company employees are eligible to participate in IMS HEALTH-sponsored
defined contribution plans. In the plan, the sponsoring employer makes a
matching contribution equal to 50% of the employee's contribution up to
specified limits of the employee's salary. The Company's expense related to
these plans was $477, $414, and $356 for the years 1999, 1998 and 1997,
respectively.

    Since 1999, certain Erisco employees have been eligible to participate in
IMS HEALTH's various healthcare and life insurance plans for retired employees.
Eligibility is measured based on service after January 1, 1996. Employees become
eligible for benefits or participation under these plans if they work 10 years
with the Company after attaining age 45. The Company accounts for its
participation in IMS HEALTH's plan as a multi-employer plan. The cost of
postretirement benefit plans in 1999 as allocated by IMS HEALTH, was $100. There
was no previously sponsered Erisco postretirement benefit plan.

NOTE 5.  EMPLOYEE STOCK PLANS

    IMS HEALTH has an Employee Stock Incentive Plan, which provides for the
grant of stock options, restricted stock and restricted stock units to eligible
Erisco employees. In addition, it provides an opportunity for the purchase of
stock options with a prepayment equal to ten percent of the exercise price, with
the remaining payment due when the options are exercised. Options have a life of
ten years, vest proportionally over three to four years and have an exercise
price equal to the fair market value of the common stock on the grant date.

    Pursuant to restricted stock units granted to Erisco employees, the Company
recognized compensation expense of $12, $12 and $4 for years 1999, 1998, and
1997, respectively.

    IMS HEALTH adopted an Employee Stock Purchase Plan in 1998 which allows
eligible Erisco employees to purchase a limited amount of common stock at the
end of each quarter at a price equal to the lesser of 90% of fair market value
on (a) the first trading day of the quarter, or (b) the last trading day of the
quarter. Fair market value is defined as the average of the high and low prices
of the shares on the relevant day. There is no compensation cost associated with
this program.

    SFAS No. 123, "Accounting for Stock-Based Compensation" requires that
companies with stock-based compensation plans either recognize compensation
expense based on the fair value of options granted or continue to apply the
existing accounting rules and disclose pro forma net income and earnings per
share assuming the fair value method had been applied. IMS HEALTH continues to
apply Accounting Principles Board Opinion No. 25 and related interpretations in
accounting for its plans. Accordingly, no compensation cost has been recognized
for the fixed stock option plans in the Respective Periods. Had the Company's
compensation cost for the employees participation in IMS HEALTH's stock-based
compensation plans been determined based on the fair value at the grant dates

                                      F-34
<PAGE>
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

                     ERISCO MANAGED CARE TECHNOLOGIES, INC.

NOTE 5.  EMPLOYEE STOCK PLANS (CONTINUED)
for awards under those plans, consistent with the method of SFAS No. 123, the
Company's net income would have been reduced to the pro forma amounts indicated
below:

<TABLE>
<CAPTION>
                                                                   YEARS ENDED DECEMBER
                                                                           31,
                                                              ------------------------------
                                                                1999       1998       1997
                                                              --------   --------   --------
<S>                                                           <C>        <C>        <C>
Net Income (loss)
As reported.................................................   $3,569     $ 460      $2,031
Pro forma...................................................   $1,964     $(129)     $1,532
</TABLE>

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

NOTE: THE PRO FORMA DISCLOSURES ABOVE MAY NOT BE REPRESENTATIVE OF THE EFFECTS
ON NET INCOME.

    On January 3, 2000, IMS HEALTH reduced the vesting period on substantially
all options previously granted with a six-year vesting period to four years. As
a result, 529,039 previously unvested options became exercisable at January 3,
2000. The impact of the change in vesting will accelerate the pro forma fair
value charge for previously vested options reflected in the pro forma
disclosures required by SFAS No. 123, thereby significantly increasing the 2000
pro forma SFAS No. 123 earnings charge when compared to the actual reported
amount in prior periods. Under APB No. 25, there will be no charge to the
Statement of Income for this change.

    The fair value of IMS HEALTH's stock options used to compute pro forma net
income, as disclosed above, is the estimated present value at grant date using
the Black-Scholes option-pricing model. The following weighted-average
assumptions were used by IMS HEALTH for 1999: dividend yield of 0.3%; expected
volatility of 35%; a risk-free interest rate of 4.8%; and an expected term of
3 years. The following weighted average assumptions were used for 1998: dividend
yield of 0.3%; expected volatility of 25%; a risk-free interest rate of 5.5%;
and an expected term of 3 years. The following weighted average assumptions were
used for 1997: dividend yield of 0.3%; expected volatility of 25%; a risk-free
interest rate of 6.1%; and an expected term of 4.5 years. The weighted average
fair value (per stock option) of the IMS HEALTH's stock options granted in the
Respective Periods are $9.85, $7.14 and $6.62, respectively. These assumptions
are based on circumstances and factors associated with IMS HEALTH, particularly
expected volatility. They may not be indicative of those that Erisco would have
had if it was a separate company.

    Immediately following the spin-off of IMS HEALTH by Cognizant in July of
1998, outstanding awards under Cognizant's Key Employees Stock Incentive Plan
and other option plans were adjusted to maintain their then intrinsic value of
the existing awards. In addition, as a result of the Gartner spin-off by IMS
HEALTH in 1999, outstanding awards under the IMS HEALTH's Employee Stock
Incentive Plan and other option and equity plans were adjusted to maintain their
then intrinsic value of the existing awards.

    At December 31, 1999, outstanding options for IMS HEALTH common stock held
by Company employees, including the substitute awards mentioned above, totaled
2,751,332, of which 912,149 had vested and were exercisable. The option prices
range from $14.15 to $31.15 per IMS HEALTH share and are exercisable over
periods ending no later than 2009. At December 31, 1998, outstanding options for
IMS HEALTH common stock (pre-Gartner conversion) held by Company employees
totaled 2,167,292, of which 511,232 had vested and were exercisable. The option
prices ranged from $12.15 to $30.17 per IMS HEALTH share.

                                      F-35
<PAGE>
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

                     ERISCO MANAGED CARE TECHNOLOGIES, INC.

NOTE 5.  EMPLOYEE STOCK PLANS (CONTINUED)
    IMS HEALTH option activity for stock options granted to Company employees is
as follows:

<TABLE>
<CAPTION>
                                                                 IMS          WEIGHTED
                                                                HEALTH        AVERAGE
                                                                SHARES     EXERCISE PRICE
                                                              ----------   --------------
<S>                                                           <C>          <C>
IMS HEALTH Options Outstanding, January 1, 1997.............   1,887,584       $16.54
Granted.....................................................     548,500       $21.35
Exercised...................................................     (33,952)      $13.56
Expired.....................................................      (5,000)      $16.69
                                                              ----------
IMS HEALTH Options Outstanding, December 31, 1997...........   2,397,132       $17.68
NMR Conversion Adjustment...................................    (130,060)          --
Granted.....................................................     189,950       $29.43
Exercised...................................................    (283,730)      $17.30
Expired/Terminated..........................................      (6,000)      $24.64
                                                              ----------
IMS HEALTH Options Outstanding, December 31, 1998...........   2,167,292       $19.80
Gartner Conversion Adjustment...............................     296,496           --
Granted.....................................................     430,437       $34.09
Exercised...................................................     (99,193)      $17.76
Expired.....................................................     (43,700)      $22.79
                                                              ----------
IMS HEALTH Options Outstanding, December 31, 1999...........   2,751,332       $19.95
                                                              ----------
</TABLE>

<TABLE>
<CAPTION>
                      DECEMBER 31, 1999
                  -------------------------                     WEIGHTED-AVERAGE
   RANGE OF                                    REMAINING     OPTION EXERCISE PRICES
   EXERCISE         NUMBER        NUMBER      CONTRACTUAL   -------------------------
    PRICES        OUTSTANDING   EXERCISABLE      LIFE       OUTSTANDING   EXERCISABLE
---------------   -----------   -----------   -----------   -----------   -----------
<C>               <C>           <C>           <S>           <C>           <C>
$       14.15 -
$15.79.........    1,542,433      687,738     6.9 years       $15.78        $15.77
$       16.70 -
$18.39.........      148,991       68,652     7.1 years       $17.57        $17.27
$       20.07 -
$21.03.........      388,345       97,876     7.9 years       $20.87        $21.03
$       23.50 -
$26.99.........      209,767       57,883     8.6 years       $26.68        $26.88
$       27.40 -
$31.15.........      461,796            0     9.1 years       $30.81            --
                   ---------      -------
                  2,751,332..     912,149
</TABLE>

NOTE 6.  SHAREHOLDER'S EQUITY

COMMON STOCK

    The Company has authorized for issuance 200 shares of common stock with no
par value. At December 31, 1999 and 1998 the Company had 10 shares outstanding
and held by IMS HEALTH.

NOTE 7.  INCOME TAXES

    The provision for U.S. Federal, State and Local income taxes consisted of:

<TABLE>
<CAPTION>
                                                                1999       1998       1997
                                                              --------   --------   --------
<S>                                                           <C>        <C>        <C>
Current.....................................................   $3,067     $ (26)     $1,337
Deferred....................................................   $ (363)    $ 415      $  170
                                                               ------     -----      ------
Total.......................................................   $2,704     $ 389      $1,507
                                                               ======     =====      ======
</TABLE>

                                      F-36
<PAGE>
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

                     ERISCO MANAGED CARE TECHNOLOGIES, INC.

NOTE 7.  INCOME TAXES (CONTINUED)
    The following table summarizes the significant differences between applying
the U.S. Federal statutory income tax rate to the Company's income before
provision for income taxes, and the Company's reported provision for income
taxes.

<TABLE>
<CAPTION>
                                                                1999       1998       1997
                                                              --------   --------   --------
<S>                                                           <C>        <C>        <C>
Tax Expense at Statutory Rate...............................   $2,196      $297      $1,238
State and Local Income Taxes, net of federal tax benefit....      455        29         238
Other; Net..................................................       53        63          31
                                                               ------      ----      ------
Total Taxes.................................................   $2,704      $389      $1,507
                                                               ======      ====      ======
</TABLE>

    The Company's deferred tax assets (liabilities) as of December 31, are
comprised of the following:

<TABLE>
<CAPTION>
                                                                1999       1998
                                                              --------   --------
<S>                                                           <C>        <C>
Deferred Tax Assets:
  Depreciation..............................................  $   811    $   681
  Bad Debt Reserve..........................................      213        143
  Accrued Liabilities.......................................        0         87
                                                              -------    -------
                                                                1,024        911
Deferred Tax Liabilities:
  Computer Software.........................................   (3,008)    (2,968)
  Other Current Assets......................................        0       (184)
                                                              -------    -------
    Sub-Total...............................................   (3,008)    (3,152)
                                                              -------    -------
  Net Deferred Tax Liability................................  ($1,984)   ($2,241)
                                                              =======    =======
</TABLE>

    The Company has established a full valuation allowance attributable to
deferred tax assets, primarily net operating losses, in certain U.S. state and
local tax jurisdictions where, based on available evidence, it is more likely
than not that such assets will not be realized. Such amounts are not material.

NOTE 8.  LEASE COMMITMENTS

    Certain of the Company's operations are conducted from leased facilities
under operating leases. Rental expense under real estate operating leases for
the years 1999, 1998 and 1997 was $2,019, $2,074, and $1,953, respectively.
Included in the Company's operating leases of certain facilities are escalating
rent payments and construction credits, which are amortized over the life of the
lease. The approximate minimum annual rental expense for real estate operating
leases that have remaining noncancelable lease terms in excess of one year, at
December 31, 1999 was: 2000--$1,722; 2001--$1,748; 2002--$1,766; 2003--$1,792;
2004--$1,845; thereafter- $6,575.

    The Company also leases or participates in leases of certain computer and
other equipment under operating leases, principally on a short-term basis.
Rental expense under computer and other equipment leases was $260, $159, and $97
for 1999, 1998 and 1997, respectively.

NOTE 9.  RELATIONSHIPS WITH IMS HEALTH AND AFFILIATES

    IMS HEALTH uses a centralized cash management system to finance their
operations. Cash deposits from most of the Company's businesses are transferred
to IMS HEALTH on a daily basis.

                                      F-37
<PAGE>
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

                     ERISCO MANAGED CARE TECHNOLOGIES, INC.

NOTE 9.  RELATIONSHIPS WITH IMS HEALTH AND AFFILIATES (CONTINUED)
IMS funds the Company's disbursement bank accounts as required. No interest has
been charged on these transactions.

    In addition to the retirement benefit programs discussed in Note 4, IMS
HEALTH provides certain centralized services (see Note 1) to the Company.
Expenses related to these services were allocated to the Company based on
utilization of centralized services or, where not estimable, based on revenue of
the Company in proportion to IMS HEALTH's consolidated revenue. Management
believes these allocation methods are reasonable. Allocations based on
utilization of centralized services were $1,239, $334, and $348 in 1999, 1998,
and 1997, respectively. Erisco entered the IMS HEALTH healthcare plan in 1999
and received an allocation for the first time. Allocations based on revenue of
the Company in proportion to the consolidated IMS HEALTH revenue were $219,
$254, and $257 in 1999, 1998, and 1997 respectively. All allocations were
included in the operating expenses of the Company. Allocations are not
necessarily representative of the costs the Company would incur as a stand-alone
entity. Amounts due to IMS HEALTH for these allocated expenses are included in
Due from Parent.

    In 1997, the Company entered into a demand promissory note payable to
Spartan Leasing Corporation, a controlled subsidiary of IMS. Interest is
compounded quarterly. Through 1999, no interest payments have been made. The
interest rate is reset every 90 days, based on the higher of either the
commercial paper rate one business day prior to 1st day of the interest period,
or the LIBOR rate three business days prior to first day of the interest period,
plus .05%. As of December 31, 1999 principal and accrued interest of $45,639 and
$7,680, respectively and included in Note Payable, Related Party in the
Statement of Financial Position. This note has been guaranteed by IMS HEALTH.
See footnote 12 to these financial statements regarding the subsequent repayment
of this note.

    In 1999, the Company entered into an agreement with Cognizant Technology
Solutions (CTS), whose majority shareholder is IMS HEALTH. The agreement sets
forth a cross-marketing relationship between the two entities. Erisco generates
commissions for revenue earned by CTS as a result of the agreement. No
commissions were accrued to Erisco as a result of this agreement in 1999. As a
result, in the opinion of management it is remote that a loss may occur in
conjuction with these matters.

    IMS HEALTH has agreed to indemnify ERISCO for certain contingencies where
joint and several liability exist that may arise under the agreements entered
into in connection with the 1996 spin-off of Cognizant Corporation from The
Dun & Bradstreet Corporation and the 1998 spin-off with Nielsen Media
Research Inc.

NOTE 10.  CONTINGENCIES

    The Company has from time to time been involved in legal proceedings and
litigation arising in the ordinary course of business, however, no such
proceedings or litigation are currently pending.

                                      F-38
<PAGE>
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

                     ERISCO MANAGED CARE TECHNOLOGIES, INC.

NOTE 11.  SUPPLEMENTAL FINANCIAL DATA

    ACCOUNTS RECEIVABLE--NET:

<TABLE>
<CAPTION>
                                                                1999       1998
                                                              --------   --------
<S>                                                           <C>        <C>
Trade.......................................................  $ 3,020    $ 2,113
Unbilled Revenue............................................      428        540
Other.......................................................       19         20
Less: Allowance for Doubtful Accounts.......................     (543)      (351)
                                                              -------    -------
                                                              $ 2,924    $ 2,322
                                                              =======    =======
</TABLE>

    PROPERTY AND EQUIPMENT:

<TABLE>
<CAPTION>
                                                                1999       1998
                                                              --------   --------
<S>                                                           <C>        <C>
Furniture and Fixtures......................................  $ 1,343    $   395
Machinery and Equipment.....................................    5,275      3,994
Less: Accumulated Depreciation..............................   (4,201)    (3,389)
Leasehold Improvements, less: Accumulated Amortization of
  $1,673 and $1,368.........................................    1,782        246
Internal Use Software, less: Accumulated Amortization of
  $662 and $540.............................................      214        184
                                                              -------    -------
                                                              $ 4,413    $ 1,430
                                                              =======    =======
</TABLE>

    ACCRUED AND OTHER CURRENT LIABILITIES:

<TABLE>
<CAPTION>
                                                                1999       1998
                                                              --------   --------
<S>                                                           <C>        <C>
Salaries, Wages, Bonuses and Other Compensation.............   $1,917     $2,010
Other.......................................................    2,685      1,950
                                                               ------     ------
                                                               $4,602     $3,960
                                                               ======     ======
</TABLE>

NOTE 12.  INFORMATION ON PRODUCTS AND SERVICES

   In June 1997, the FASB issued SFAS No. 131, DISCLOSURES ABOUT SEGMENTS OF AN
ENTERPRISE AND RELATED INFORMATION. SFAS No. 131 establishes standards for the
way that companies report information about operating segments in annual
financial statements. It also establishes standards for related disclosures
about products and services, geographic areas, and major customers. The adoption
of SFAS 131 did not have a material effect on the Company's financial
statements.

    The Company generates substantially all of its revenues through software
sales and services under a common management team, and therefore the Company has
only one reportable segment. All revenues are generated from domestic sources.
All of the Company's long-lived assets are physically located within the United
States.

    Total operating expenses are controlled centrally based on established
budgets by operating department. Operating departments include product
development, sales and marketing, account management and customer service, and
finance and administration. Assets, technology, and personnel resources of the
Company are shared and utilized for all of the Company's service offering. These
resources are allocated based on contractual requirements, the identification of
enhancements to the

                                      F-39
<PAGE>
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

                     ERISCO MANAGED CARE TECHNOLOGIES, INC.

NOTE 12.  INFORMATION ON PRODUCTS AND SERVICES (CONTINUED)
current service offerings, and other non-financial criteria. The Company does
not prepare operating statements by revenue source. The Company does not account
for, and does not report to management, its assets or capital expenditures by
revenue source.

NOTE 13.  SUBSEQUENT EVENTS (UNAUDITED)

    DIVESTITURE AGREEMENT

    On May 16, 2000, IMS HEALTH and The TriZetto Group, Inc. ("TriZetto")
jointly announced a strategic alliance under which TriZetto will acquire Erisco
for TriZetto stock. Further, IMS HEALTH and TriZetto will enter into a
technology and data partnership. The alliance supercedes the merger of the two
companies previously announced March 29, 2000, which has been terminated by the
consent of both Board of Directors.

    The new agreement calls for issuance of TriZetto stock in exchange for all
outstanding Erisco common stock. Based on TriZetto's closing price on May 16,
2000, of $24.00, IMS HEALTH would receive approximately 10.63 million TriZetto
shares, valuing Erisco at $255 million. The transaction is structured with a
collar between $21 TriZetto stock price, below which IMS HEALTH receives
12.1 million TriZetto shares, and a $29 TriZetto stock price, above which IMS
HEALTH receives 8.8 million shares. The final exchange ratio will be determined
by TriZetto's average daily price for the 15 trading days ending on the third
day prior to the closing date, which is currently expected late in the third
quarter of 2000.

    Pursuant to the agreement, IMS HEALTH has indemnified TriZetto of all taxes,
including sales taxes, and other contingencies that may exist prior to the
closing of the transaction. IMS HEALTH has also agreed to indemnify TriZetto for
breaches of representation and warranties made in the agreement.

    For purposes of governing certain of the ongoing relationships between the
Company and IMS HEALTH after the closing and to provide for an orderly
transition, the Company and IMS HEALTH may enter into various business service
arrangements, including, providing Accounting operations, providing other
Corporate or Operational resources.

    EQUITY FINANCING

    On June 30, 2000, IMS HEALTH made a capital contribution of $55,034 to
Erisco, which was recorded as Capital In Excess of Par in the Statement of
Financial Position. On the same date, Erisco repaid the principal and accrued
interest on its note payable to Spartan Leasing Corporation of $45,639 and
$9,392, respectively, extinguishing its obligation under this note.

                                      F-40
<PAGE>
                       REPORT OF INDEPENDENT ACCOUNTANTS

To the Board of Directors and Stockholders
of Croghan & Associates, Inc.

    In our opinion, the accompanying statements of operations, of stockholders'
equity and of cash flows present fairly, in all material respects, the results
of operations and cash flows of Croghan & Associates, Inc. for the year ended
December 31, 1996 and for the nine months ended September 30, 1997 in conformity
with generally accepted accounting principles. These financial statements are
the responsibility of the Company's management; out responsibility is to express
an opinion on these financial statements based on our audits. We conducted our
audits of these statements in accordance with generally accepted auditing
standards which require that we plan and perform the audit to obtain reasonable
assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements, assessing the
accounting principles used and significant estimates made by management, and
evaluating the overall financial statement presentation. We believe that our
audits provide a reasonable basis for the opinion expressed above.

    Certain costs and expenses presented in the financial statements represent
allocations and management's estimates of the cost of services provided to
Croghan & Associates, Inc. As a result, the financial statements presented may
not be indicative of the results of operations that would have been achieved had
Croghan & Associates, Inc. operated as a non-affiliated entity.

                                          PricewaterhouseCoopers LLP

San Jose, California
September 7, 1999

                                      F-41
<PAGE>
                           CROGHAN & ASSOCIATES, INC.

                            STATEMENTS OF OPERATIONS

<TABLE>
<CAPTION>
                                                                FOR THE       NINE MONTHS
                                                               YEAR ENDED        ENDED
                                                              DECEMBER 31,   SEPTEMBER 30,
                                                                  1996           1997
                                                              ------------   -------------
<S>                                                           <C>            <C>
Revenue.....................................................  $ 5,088,288     $ 3,880,699
Cost of revenue.............................................    4,068,148       3,608,783
                                                              -----------     -----------
Gross profit................................................    1,020,140         271,916

Operating expenses:
  Selling general and administrative........................    2,142,219       2,414,944
                                                              -----------     -----------
Loss from operations........................................   (1,122,079)     (2,143,028)

Other income (expense):
Interest income.............................................       20,778          14,892
Interest expense............................................   (1,340,660)        (84,063)
                                                              -----------     -----------
Loss before extraordinary item..............................   (2,441,961)     (2,212,199)

Extraordinary item:
Gain on forgiveness of debt.................................           --       1,000,000
                                                              -----------     -----------
Net loss....................................................  $(2,441,961)    $(1,212,199)
                                                              ===========     ===========
</TABLE>

                                      F-42
<PAGE>
                           CROGHAN & ASSOCIATES, INC.
                       STATEMENTS OF STOCKHOLDERS' EQUITY
           FOR THE PERIOD FROM JANUARY 1, 1996 TO SEPTEMBER 30, 1997

<TABLE>
<CAPTION>
                              COMMON STOCK                      RETAINED
                          (PAR VALUE - $0.001)   ADDITIONAL     EARNINGS                     DISTRIBUTION       TOTAL
                          --------------------    PAID-IN     (ACCUMULATED                   IN EXCESS OF   SHAREHOLDERS'
                           SHARES      AMOUNT     CAPITAL       DEFICIT)     PARENT EQUITY    NET VALUE        EQUITY
                          ---------   --------   ----------   ------------   -------------   ------------   -------------
<S>                       <C>         <C>        <C>          <C>            <C>             <C>            <C>
Balance at January 1,
  1996..................         --    $   --      $   --     $        --     $10,261,446     $       --     $10,261,446
Net loss prior to
  reorganization........         --        --          --              --      (2,201,569)            --      (2,201,569)
Reorganization..........  3,200,000     3,200          --              --      (8,059,877)     8,056,677              --
Net loss subsequent to
  reorganization........         --        --          --        (240,392)             --             --        (240,392)
                          ---------    ------      ------     -----------     -----------     ----------     -----------
Balance at December 31,
  1996..................  3,200,000     3,200          --        (240,392)             --      8,056,677       7,819,485
Issuance of common
  stock.................  6,273,844     6,274       3,570              --              --             --           9,844
Net loss................         --        --          --      (1,212,199)             --             --      (1,212,199)
                          ---------    ------      ------     -----------     -----------     ----------     -----------
Balance at September 30,
  1997..................  9,473,844    $9,474      $3,570     $(1,452,591)    $        --     $8,056,677     $ 6,617,130
                          =========    ======      ======     ===========     ===========     ==========     ===========
</TABLE>

   The accompanying notes are an integral part of these financial statements.

                                      F-43
<PAGE>
                           CROGHAN & ASSOCIATES, INC.

                            STATEMENTS OF CASH FLOWS

<TABLE>
<CAPTION>
                                                                FOR THE       NINE MONTHS
                                                               YEAR ENDED        ENDED
                                                              DECEMBER 31,   SEPTEMBER 30,
                                                                  1996           1997
                                                              ------------   -------------
<S>                                                           <C>            <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
  Net loss..................................................  $(2,441,961)    $(1,212,199)
  Adjustments to reconcile net loss to net cash provided by
    (used in) operating activities:
    Provision for doubtful accounts.........................      662,721          88,000
    Gain on debt forgiveness................................           --      (1,000,000)
    Depreciation and amortization...........................    1,854,668       1,210,164
    Changes in current assets and liabilities:
      Accounts receivable...................................     (321,691)       (140,654)
      Prepaid expenses and other current assets.............     (271,251)        285,088
      Accounts payable......................................     (147,171)        105,000
      Accrued liabilities...................................      371,704        (178,112)
      Deferred revenue......................................      899,984         (83,116)
      Other long-term assets................................          375          (4,500)
                                                              -----------     -----------
        Net cash provided by (used in) operating
          activities........................................      607,378        (930,329)
                                                              -----------     -----------

CASH FLOWS FROM INVESTING ACTIVITIES:
  Purchase of property and equipment........................     (440,627)        (46,829)
                                                              -----------     -----------
        Net cash used in investing activities...............     (440,627)        (46,829)
                                                              -----------     -----------

CASH FLOWS FROM FINANCING ACTIVITIES:
  Proceeds from issuance of common stock....................           --           9,844
  Payments on notes payable.................................           --         (70,000)
  Proceeds from borrowings..................................    1,590,000              --
                                                              -----------     -----------
        Net cash provided by (used in) financing
          activities........................................    1,590,000         (60,156)
                                                              -----------     -----------
Net increase (decrease) in cash and cash equivalents........    1,756,751      (1,037,314)
Cash and cash equivalents at beginning of period............           --       1,756,751
                                                              -----------     -----------
Cash and cash equivalents at end of period..................  $ 1,756,751     $   719,437
                                                              ===========     ===========

SUPPLEMENTAL DISCLOSURES FOR CASH FLOW INFORMATION:
  Cash paid for interest....................................  $ 1,314,770     $   109,953
                                                              ===========     ===========
</TABLE>

   The accompanying notes are an integral part of these financial statements.

                                      F-44
<PAGE>
                           CROGHAN & ASSOCIATES, INC.

                         NOTES TO FINANCIAL STATEMENTS

NOTE 1. FORMATION AND BUSINESS OF THE COMPANY

    Croghan & Associates, Inc. (the "Company" or "Croghan & Associates") is a
healthcare application services provider delivering proprietary software
applications. The Company implements, hosts and manages applications and
services on computing, networking and operating platforms.

NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

    BASIS OF PRESENTATION

    The financial statements of Croghan & Associates include all the necessary
personnel costs and pro rata allocations of overhead from Banc One Corporation,
on a basis which management believes represents a reasonable allocation of such
costs. These charges comprise the parent company's net investment in Croghan &
Associates. Effective December 1, 1996, an officer of the Company assumed the
assets and liabilities of Croghan & Associates for no additional consideration.

    USE OF ESTIMATES

    The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and reported amounts of revenues and expenses during the reporting
period. Actual results could differ from those estimates.

    CONCENTRATION OF CREDIT RISK

    The following table summarizes the revenues from customers in excess of 10%
of the total revenues:

<TABLE>
<CAPTION>
                                                        FOR THE       NINE MONTHS
                                                       YEAR ENDED        ENDED
                                                      DECEMBER 31,   SEPTEMBER 30,
                                                          1996           1997
                                                      ------------   -------------
<S>                                                   <C>            <C>
Company A...........................................       51%             33%
Company B...........................................       25%             13%
</TABLE>

    REVENUE RECOGNITION

    Multi-year contractually based revenue is recognized monthly based on volume
of service transactions. Provisions for estimated losses on contracts are
recorded when identified.

    INCOME TAXES

    The Company accounts for income taxes under the liability method. Under this
method, deferred tax assets and liabilities are determined based on the
difference between the financial statement and tax bases of assets and
liabilities using enacted tax rates in effect for the year in which the
differences are expected to affect taxable income. A valuation allowance is
established when necessary to reduce deferred tax assets to the amounts expected
to be realized.

                                      F-45
<PAGE>
                           CROGHAN & ASSOCIATES, INC.

                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)

NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
    COMPREHENSIVE INCOME

    The Company has adopted the provisions of Statement of Financial Accounting
Standards ("SFAS") No. 130, "Comprehensive Income." SFAS 130 establishes
standards for reporting and display of comprehensive income and its components
for general-purpose financial statements. Comprehensive income is defined as net
income plus all revenues, expenses, gains and losses from non-owner sources that
are excluded from net income in accordance with generally accepted accounting
principles. For all periods presented, there were no material differences
between comprehensive and net income.

    RECENT ACCOUNTING PRONOUNCEMENTS

    In March 1998, the American Institute of Certified Public Accountants issued
Statement of Position ("SOP") No. 98-1, "Software for Internal Use," which
provides guidance on accounting for the cost of computer software developed or
obtained for internal use. SOP No. 98-1 is effective for financial statements
for fiscal years beginning after December 15, 1998. The Company does not expect
that the adoption of SOP No. 98-1 will have a material impact on its
consolidated financial statements.

    In June 1998, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards ("SFAS") No. 133, "Accounting for Derivative
Instruments and Hedging Activities," which establishes accounting and reporting
standards for derivative instruments and hedging activities. SFAS No. 133 is
effective for fiscal years beginning after June 15, 2000. It requires that an
entity recognize all derivatives as either assets or liabilities in the
statement of financial position and measure those instruments at fair value. To
date, the Company has not engaged in derivative and hedging activities.

NOTE 3. COMMITMENTS AND CONTINGENCIES

    In December 1996, the Company began a self-insurance program to provide
medical benefits to its employees. Reserves for incurred but not reported claims
total $60,000 and $65,000 at December 31, 1996 and September 30, 1997,
respectively.

NOTE 4. STOCKHOLDERS' EQUITY

    WARRANTS

    The Company issued a warrant to purchase 243,893 shares of the Company's
common stock at an exercise price of $0.53 per share in connection with a
financing agreement. The warrant expires on the earlier of (i) the effective of
an initial public offering of the Company's common stock, or (ii) the effective
date of a merger, sale of assets or other sale of the Company. The value of the
warrant determined using the Black-Scholes model was not material.

    STOCK SPLIT

    In January 1997, the Company's Board of Directors authorized a 16-to-1 stock
split. Share information has been restated in the accompanying financial
statements to reflect the stock split for all periods presented.

                                      F-46
<PAGE>
                           CROGHAN & ASSOCIATES, INC.

                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)

NOTE 5. INCOME TAXES

    There was no provision for income taxes for the year ended December 31, 1996
and the nine months ended September 30, 1997. The Company's effective tax rate
differs from the statutory rate as shown in the following:

<TABLE>
<CAPTION>
                                                                      NINE MONTHS
                                                       YEAR ENDED        ENDED
                                                      DECEMBER 31,   SEPTEMBER 30,
                                                          1996           1997
                                                      ------------   -------------
<S>                                                   <C>            <C>
Tax provision at federal statutory rate.............        34%            34%
Change in valuation allowance.......................       (34)           (34)
                                                           ---            ---
Tax provision.......................................        --%            --%
                                                           ===            ===
</TABLE>

6. SEGMENT INFORMATION

    The Company, which operates in a single industry segment, provides
healthcare application services. All of the Company's revenues are recorded for
services performed in the United States. Additionally, all of the Company's
assets are located in the United States.

                                      F-47
<PAGE>
                                                                      APPENDIX A

                      AGREEMENT AND PLAN OF REORGANIZATION

    THIS AGREEMENT AND PLAN OF REORGANIZATION (this "AGREEMENT") is entered into
as of this 16th day of May 2000, by and among The TriZetto Group, Inc., a
Delaware corporation ("TRIZETTO"), Elbejay Acquisition Corp., a Delaware
corporation and wholly-owned subsidiary of TriZetto ("MERGER SUB"), IMS Health
Incorporated, a Delaware corporation ("IMS"), and ERISCO Managed Care
Technologies, Inc., a New York corporation and wholly-owned subsidiary of IMS
("ERISCO").

                                    RECITALS

    WHEREAS, IMS and TriZetto entered into an Agreement and Plan of
Reorganization, dated as of March 28, 2000 (the "MERGER AGREEMENT"), pursuant to
which, among other things, IMS would merge with and into TriZetto with TriZetto
as the surviving corporation in the merger;

    WHEREAS, pursuant to Section 9.1(a) of the Merger Agreement, IMS and
TriZetto desire to terminate the Merger Agreement without liability to either
party;

    WHEREAS, the Boards of Directors of TriZetto, Merger Sub, IMS and Erisco
deem it advisable and in the best interests of each corporation and its
respective stockholders that Erisco and Merger Sub engage in a business
combination in order to advance the long-term strategic business interests of
TriZetto and IMS;

    WHEREAS, upon the terms and subject to the conditions of this Agreement,
Merger Sub will merge with and into Erisco (the "MERGER"), with Erisco as the
surviving corporation in the Merger, all pursuant to the terms and conditions of
this Agreement and the applicable provisions of the New York Business
Corporation Law, as amended (the "NYBCL"), and the Delaware General Corporation
Law (the "DGCL");

    WHEREAS, in furtherance thereof, the Board of Directors of each of TriZetto,
Merger Sub, IMS and Erisco have approved the Merger, upon the terms and subject
to the conditions set forth in this Agreement, pursuant to which each share of
common stock of Erisco issued and outstanding immediately prior to the Effective
Time (as defined in Section 2.2) will be converted into the right to receive
shares of common stock of TriZetto as set forth herein;

    WHEREAS, contemporaneously with the execution and delivery of this
Agreement, and as a condition and inducement to IMS's willingness to enter into
this Agreement, IMS and certain stockholders of TriZetto (the "DESIGNATED
STOCKHOLDERS") are entering into agreements dated as of the date hereof in the
form of EXHIBITS A, B and C hereto (the "VOTING AGREEMENTS") pursuant to which
the Designated Stockholders have agreed, among other things, to vote their
shares of TriZetto Common Stock in favor of the transactions contemplated by
this Agreement;

    WHEREAS, for United States federal income tax purposes, it is intended that
the Merger shall qualify as a "tax-free" reorganization within the meaning of
Section 368(a) of the Internal Revenue Code of 1986, as amended (the "CODE"),
and the regulations promulgated thereunder; and

    WHEREAS, IMS, Erisco, TriZetto and Merger Sub desire to make certain
representations, warranties, covenants and agreements in connection with this
Agreement.

                                      A-1
<PAGE>
    NOW, THEREFORE, in consideration of the foregoing and the respective
representations, warranties, covenants and agreements set forth in this
Agreement, and intending to be legally bound hereby and thereby, the parties
hereto agree as follows:

    1.  TERMINATION OF MERGER AGREEMENT.  By their execution and delivery of
this Agreement, IMS and TriZetto hereby mutually agree to terminate the Merger
Agreement pursuant to Section 9.1(a) thereof without liability to either party.
Except as expressly set forth in the Merger Agreement, the Merger Agreement
shall have no further force and effect. For the avoidance of doubt, neither IMS
nor TriZetto shall have any obligations with respect to the payment of a
Termination Fee (as defined in the Merger Agreement) or the reimbursement of any
Expenses (as defined in the Merger Agreement) pursuant to Section 9.4 of the
Merger Agreement, and each of IMS and TriZetto hereby waive all rights of such
party pursuant to such Section. IMS and TriZetto further agree that the letter
agreements listed on Schedule 1 hereto shall be hereby terminated.

    2.  PLAN OF REORGANIZATION.

        2.1  THE MERGER.  Upon the terms and subject to the conditions set forth
    in this Agreement, at the Effective Time, Merger Sub shall be merged with
    and into Erisco and the corporate existence of Merger Sub shall thereupon
    cease. Erisco shall be the surviving corporation in the Merger (sometimes
    hereinafter referred to as the "SURVIVING CORPORATION"), and the separate
    corporate existence of Erisco with all its rights, privileges, immunities,
    powers and franchises shall continue unaffected by the Merger. The Merger
    shall have the effects specified in the NYBCL and the DGCL.

        2.2  THE CLOSING.  Subject to the termination of this Agreement as
    provided in Section 12 below, the closing of the transactions contemplated
    by this Agreement (the "CLOSING") shall take place at the offices of
    Stradling Yocca Carlson & Rauth, 660 Newport Center Drive, Suite 1600,
    Newport Beach, California 92660 on a date (the "CLOSING DATE") and at a time
    to be mutually agreed upon by IMS and TriZetto, which date shall be no later
    than the third business day after all conditions to Closing set forth herein
    (other than those conditions that by their nature are to be satisfied at the
    Closing, but subject to the fulfillment or waiver of those conditions) shall
    have been satisfied or waived in accordance with this Agreement, unless
    another place, time and date is mutually agreed upon in writing by IMS and
    TriZetto. As soon as practicable following the Closing, TriZetto and IMS
    will cause a Certificate of Merger (the "NY CERTIFICATE OF MERGER") to be
    executed, acknowledged and filed in the office of the Secretary of State of
    the State of New York as provided in Section 904-A of the NYBCL and a
    Certificate of Merger (the "DE CERTIFICATE OF MERGER") to be executed,
    acknowledged and filed in the office of the Secretary of State of the State
    of Delaware as provided in Section 252 of the DGCL. The Merger shall become
    effective at the time when the last of the following actions shall have been
    consummated: (i) the NY Certificate of Merger has been duly filed by the
    office of the New York Department of State and (ii) the DE Certificate of
    Merger has been duly filed with the Secretary of State of the State of
    Delaware (the "EFFECTIVE TIME").

        2.3  EFFECT ON CAPITAL STOCK.  At the Effective Time, as a result of the
    Merger and without any action on the part of any holder of any capital stock
    of Erisco:

           (A)  CONVERSION OF SHARES.  The shares of Common Stock, par value
       $.01 per share, of Erisco ("ERISCO COMMON STOCK"), that are issued and
       outstanding immediately prior to the Effective Time (other than shares of
       Erisco Common Stock held by Erisco in its treasury (the "EXCLUDED
       SHARES")) shall be converted, in the aggregate, into the right to receive
       that number of shares (the "MERGER CONSIDERATION") of validly issued,
       fully paid and nonassessable Common Stock, par value $0.001 per share
       (the "TRIZETTO COMMON STOCK"), rounded to the

                                      A-2
<PAGE>
       nearest whole share, equal to the amount derived by dividing $255,000,000
       by the Average Closing Price (as defined herein); provided, that:

               (I) if the Average Closing Price is less than $21.00, the Merger
           Consideration shall be 12,142,857 shares of TriZetto Common Stock; or

               (II) if the Average Closing Price is greater than $29.00, the
           Merger Consideration shall be 8,793,103 shares of TriZetto Common
           Stock.

    As used herein, the "AVERAGE CLOSING PRICE" shall mean the average of the
    per share closing prices of TriZetto Common Stock as reported on the NASDAQ
    National Market System (the "NASDAQ") (as reported in the New York City
    edition of THE WALL STREET JOURNAL or, if not reported thereby or if
    manifestly erroneous, another authoritative source) for 15 trading days
    ending on the third trading day prior to the Closing Date.

        At the Effective Time, all shares of Erisco Common Stock shall no longer
    be outstanding and shall be cancelled and retired and shall cease to exist,
    and all certificates formerly representing any such shares of Erisco Common
    Stock (other than Excluded Shares) shall thereafter represent only the right
    to receive the Merger Consideration. All Excluded Shares shall, by virtue of
    the Merger and without any action on the part of the holder thereof, cease
    to be outstanding, shall be cancelled and retired without payment of any
    consideration therefor and shall cease to exist.

           (B)  MERGER SUB COMMON STOCK.  At the Effective Time, each share of
       Common Stock, par value $0.001 per share, of Merger Sub issued and
       outstanding immediately prior to the Effective Time shall be converted
       into one share of common stock of the Surviving Corporation.

           (C)  ADJUSTMENTS FOR CAPITAL CHANGES.  If, prior to the Effective
       Time, TriZetto recapitalizes through a subdivision of its outstanding
       shares into a greater number of shares, or by a combination of its
       outstanding shares into a lesser number of shares, or reorganizes,
       reclassifies or otherwise changes its outstanding shares into the same or
       a different number of shares of other classes, or declares a dividend on
       its outstanding shares payable in shares of its capital stock or
       securities convertible into shares of its capital stock, then the Merger
       Consideration will be adjusted equitably so as to maintain the
       proportionate interest in the issued and outstanding TriZetto Common
       Stock represented by the Merger Consideration.

           (D)  DISSENTING SHARES.  In accordance with Section 910 of the NYBCL,
       no appraisal rights shall be available to holders of Erisco Common Stock
       in connection with the Merger.

        2.4  FRACTIONAL SHARES.  No fractional shares of TriZetto Common Stock
    will be issued in the Merger.

        2.5  EXCHANGE OF CERTIFICATES.  At the Closing (i) IMS shall deliver to
    TriZetto certificates representing all shares of Erisco Common Stock then
    issued and outstanding and (ii) TriZetto shall deliver or cause to be
    delivered to IMS duly executed certificates representing the Merger
    Consideration.

        2.6  CERTIFICATE OF INCORPORATION AND BY-LAWS.

           (A) The Certificate of Incorporation of Erisco, as in effect
       immediately prior to the Effective Time, shall be the certificate of
       incorporation of the Surviving Corporation until thereafter changed or
       amended as provided therein or by applicable law.

           (B) The By-laws of Merger Sub, as in effect immediately prior to the
       Effective Time, shall be the by-laws of the Surviving Corporation until
       thereafter changed or amended as provided therein or by applicable law.

                                      A-3
<PAGE>
    3.  REPRESENTATIONS AND WARRANTIES OF IMS AND ERISCO.

    Except as set forth in the letter to be delivered by IMS and Erisco to
TriZetto concurrently herewith (the "IMS DISCLOSURE LETTER), IMS and Erisco,
jointly and severally, represent and warrant to TriZetto as set forth below. In
this Agreement, the term "MATERIAL ADVERSE EFFECT" used in connection with a
party or any of such party's subsidiaries means any event, change or effect that
is materially adverse to the financial condition, properties, assets,
liabilities, businesses or results of operations of such party and its
subsidiaries, taken as a whole, or to the ability of such party to consummate
the Merger and the other transactions contemplated hereby, other than, in each
case, events, changes or effects that result from general economic conditions or
conditions generally affecting the industry in which such party conducts
operations.

        3.1  ORGANIZATION; GOOD STANDING; QUALIFICATION AND POWER.  Erisco is a
    corporation duly organized, validly existing and in good standing under the
    laws of the State of New York, has all requisite corporate power and
    authority to own, lease and operate its properties and to carry on its
    business as now being conducted, and is duly qualified and in good standing
    to do business in each jurisdiction in which the nature of its business or
    the ownership or leasing of its properties makes such qualification
    necessary, other than in such jurisdictions where the failure to so qualify
    is not reasonably likely to have a Material Adverse Effect on Erisco. IMS
    has made available to TriZetto or its counsel complete and correct copies of
    the Certificate of Incorporation and bylaws of Erisco.

        3.2  CAPITAL STRUCTURE.

           (A)  STOCK AND OPTIONS.  The authorized capital stock of Erisco
       consists of 200 shares of Common Stock, no par value. At the close of
       business on the date of this Agreement, 10 shares of Erisco Common Stock
       were issued and outstanding, all of which were held by IMS. All
       outstanding shares of Erisco Common Stock are validly issued, fully paid
       and nonassessable and not subject to preemptive rights and are owned by
       IMS free and clear of any liens, security interests, pledges, agreements,
       claims, charges or encumbrances. IMS has made available to TriZetto true
       and correct copies of its 1998 Employees' Stock Incentive Plan, 1998
       Replacement Plan for Certain Employees Holding Cognizant Corporation
       Equity-Based Awards, 1998 Employees Stock Purchase Plan (the "ESPP"), and
       1998 Replacement Plan for Certain Individuals Holding Cognizant
       Corporation Stock Options (collectively, the "IMS PLANS") and a correct
       and complete list of the following information with respect to options to
       purchase shares of IMS Common Stock issued to Erisco employees or
       consultants (the "IMS OPTIONS") outstanding as of May 16, 2000: (i) the
       aggregate number of shares of IMS Common Stock subject to IMS Options
       under each IMS Plan other than the ESPP; (ii) the exercise price of the
       IMS Options outstanding under each such IMS Plan; (iii) the vesting
       schedule under each such IMS Plan; and (iv) with respect to Erisco
       employees that have entered into change of control agreements with IMS,
       the name of such employee, the number of shares of IMS Common Stock
       subject to IMS Options held by such employee, the particular IMS Plan(s)
       pursuant to which such IMS Options were granted and the vesting schedule
       of the IMS Options held by such employee.

           (B)  NO OTHER COMMITMENTS.  There are no options, warrants, calls,
       rights, commitments, conversion rights or agreements of any character to
       which IMS or Erisco is party or by which IMS or Erisco is bound
       obligating Erisco to issue, deliver or sell, or cause to be issued,
       delivered or sold, any shares of capital stock of Erisco or securities
       convertible into or exchangeable for shares of capital stock of Erisco,
       or obligating Erisco to grant, extend or enter into any such option,
       warrant, call, right, commitment, conversion right or agreement.

           (C)  SUBSIDIARIES.  Except for IMS Health Purchasing, Inc., a
       Delaware corporation and wholly-owned subsidiary of Erisco ("IHPI"),
       Erisco does not own, control or hold with the power to vote, directly or
       indirectly, of record, beneficially or otherwise, any share capital,

                                      A-4
<PAGE>
       capital stock or any equity or ownership interest in any company,
       corporation, partnership, association, joint venture, business, trust or
       other entity. IHPI has not conducted any business or engaged in any
       activity that has resulted in any liability to Erisco, and does not own
       any assets relating to businesses conducted by Erisco.

        3.3  AUTHORITY.

           (A)  CORPORATE ACTION BY IMS.  IMS has all requisite corporate power
       and authority to enter into this Agreement, the Voting Agreements, the
       Registration Rights Agreement (as defined in Section 7.3), the
       Stockholder Agreement (as defined in Section 7.4), the Transitional
       Services Agreements (as defined in Section 7.5), the Data Rights
       Agreement (as defined in Section 7.6) and the License Agreement (as
       defined in Section 7.7) (collectively, the "BASIC DOCUMENTS"), to perform
       its obligations under the Basic Documents and to consummate the
       transactions contemplated by the Basic Documents. The execution and
       delivery of the Basic Documents by IMS and the consummation by IMS of the
       transactions contemplated thereby have been duly authorized by all
       necessary corporate action on the part of IMS. Each of the Basic
       Documents has been, or will when executed be, duly executed and delivered
       by IMS and is, or when executed will be, the valid and binding obligation
       of IMS, enforceable in accordance with its terms, except that such
       enforceability may be subject to (i) bankruptcy, insolvency,
       reorganization or other similar laws affecting or relating to enforcement
       of creditors' rights generally and (ii) general equitable principles (the
       "BANKRUPTCY AND EQUITY EXCEPTION").

           (B)  CORPORATE ACTION BY ERISCO.  Erisco has all requisite corporate
       power and authority to enter into this Agreement and the Transitional
       Services Agreements, to perform its obligations hereunder and thereunder
       and to consummate the Merger and the other transactions contemplated by
       this Agreement and the Transitional Services Agreements. The execution
       and delivery of this Agreement and the Transitional Services Agreements
       by Erisco and the consummation by Erisco of the Merger and the other
       transactions contemplated hereby and by the Transitional Services
       Agreements have been duly authorized by all necessary corporate action on
       the part of Erisco. This Agreement has been duly executed and delivered
       by Erisco and is the valid and binding obligation of Erisco, enforceable
       in accordance with its terms, except that such enforceability may be
       subject to the Bankruptcy and Equity Exception.

           (C)  NO CONFLICT.  Neither the execution, delivery and performance of
       the Basic Documents nor the consummation of the transactions contemplated
       thereby nor compliance with the provisions hereof or thereof will
       conflict with, or result in any violations of, or cause a breach or
       default (with or without notice or lapse of time, or both) under, or give
       rise to a right of termination, amendment, cancellation or acceleration
       of any obligation contained in, or the loss of any material benefit
       under, or result in the creation of any lien, security interest, charge
       or encumbrance upon any of the material properties or assets of Erisco
       under, any term, condition or provision of (A) the certificate of
       incorporation or bylaws of Erisco or (B) any loan or credit agreement,
       note, bond, mortgage, indenture, lease, license, agreement, contract,
       arrangement or other obligation ("CONTRACT"), permit, judgment, order,
       decree, statute, law, ordinance, rule or regulation applicable to Erisco
       or its properties or assets, other than any such conflicts, violations,
       defaults, losses, liens, security interests, charges, or encumbrances
       which, individually or in the aggregate, is not reasonably likely to have
       a Material Adverse Effect on Erisco.

           (D)  GOVERNMENTAL CONSENTS.  No consent, approval, order or
       authorization of, or registration, declaration or filing with, any court,
       administrative agency or commission or other governmental authority or
       instrumentality, domestic or foreign (each a "GOVERNMENTAL

                                      A-5
<PAGE>
       ENTITY"), is required to be obtained by IMS or Erisco in connection with
       the execution and delivery of the Basic Documents or the consummation of
       the transactions contemplated thereby, except for: (i) the filing with
       the Securities and Exchange Commission (the "SEC") of such reports and
       information under the Securities Exchange Act of 1934, as amended (the
       "EXCHANGE ACT"), and the rules and regulations promulgated by the SEC
       thereunder as may be required in connection with this Agreement or the
       Voting Agreements and the transactions contemplated hereby or thereby;
       (ii) the filing of the NY Certificate of Merger with the Secretary of
       State of the State of New York, the DE Certificate of Merger with the
       Secretary of State of the State of Delaware, and appropriate documents
       with the relevant authorities of other states in which Erisco is
       qualified to do business; (iii) such filings, authorizations, orders and
       approvals as may be required under foreign securities laws, state
       securities laws and the rules of the New York Stock Exchange, Inc. (the
       "NYSE"); (iv) such filings and notifications as may be necessary under
       the Hart-Scott-Rodino Antitrust Improvement Act of 1976, as amended (the
       "HSR ACT") and applicable foreign antitrust laws and (v) where the
       failure to obtain or make such consents, approvals, orders or
       authorizations, registrations, declarations or filings would not prevent
       or delay the consummation of the Merger or otherwise prevent IMS or
       Erisco from performing their respective obligations under this Agreement
       or the Voting Agreements and is not reasonably likely to have a Material
       Adverse Effect on Erisco.

        3.4  SEC DOCUMENTS.  IMS has made available to TriZetto or its counsel
    correct and complete copies of each report, schedule, registration statement
    and definitive proxy statement filed by IMS or any of its subsidiaries with
    the SEC on or after December 31, 1998 (the "IMS SEC DOCUMENTS"), which are
    all the documents (other than preliminary material) that IMS was required to
    file with the SEC on or after such date. As of their respective dates or, in
    the case of registration statements, their effective dates (or if amended or
    superseded by a filing prior to the date of this Agreement, then on the date
    of such filing), none of the IMS SEC Documents (including all exhibits and
    schedules thereto and documents incorporated by reference therein) contained
    any untrue statement of a material fact with respect to Erisco or omitted to
    state a material fact with respect to Erisco required to be stated therein
    or necessary in order to make the statements therein, in light of the
    circumstances under which they were made, not misleading.

        3.5  INFORMATION SUPPLIED.  None of the information supplied or to be
    supplied by IMS for inclusion or incorporation by reference in the Proxy
    Statement will, at the date the Proxy Statement is mailed to the
    stockholders of TriZetto and at the time of the TriZetto Stockholders
    Meeting, contain any untrue statement of a material fact or omit to state
    any material fact required to be stated therein or necessary to make the
    statements therein, in light of the circumstances under which they are made,
    not misleading. The material to be supplied by IMS in respect of the Proxy
    Statement will comply as to form in all material respects with the
    provisions of the Exchange Act and the rules and regulations promulgated by
    the SEC thereunder.

        3.6  COMPLIANCE WITH APPLICABLE LAWS.  The businesses of Erisco have not
    been and are not being conducted in violation of any federal, state, local
    or foreign law, ordinance, regulation, rule or order of any Governmental
    Entity where such violation is reasonably likely to have a Material Adverse
    Effect on Erisco. Neither IMS nor Erisco has been notified by any
    Governmental Entity that any investigation or review with respect to Erisco
    is pending or threatened, nor has any Governmental Entity notified IMS or
    Erisco of its intention to conduct the same. Erisco has all material
    permits, licenses and franchises from Governmental Entities required to
    conduct its businesses as now being conducted, except for those whose
    absence is not reasonably likely to have a Material Adverse Effect on
    Erisco.

        3.7  LITIGATION.  There is no suit, action, arbitration, demand, claim
    or proceeding ("CLAIM") pending or, to the knowledge of IMS or Erisco,
    threatened against Erisco, nor is there any judgment, decree, injunction,
    rule or order of any Governmental Entity or arbitrator outstanding

                                      A-6
<PAGE>
    against Erisco that, individually or in the aggregate, is reasonably likely
    to have a Material Adverse Effect on Erisco. Section 3.7 of the IMS
    Disclosure Letter sets forth a complete list of all material Claims made
    against Erisco or IMS, to the extent primarily related to Erisco's business,
    since January 1, 1998.

        3.8  ERISA AND OTHER COMPLIANCE.

           (A) IMS has made available to TriZetto a list of (i) each "employee
       benefit plan," as defined in Section 3(3) of the Employee Retirement
       Income Security Act of 1974, as amended ("ERISA"), and (ii) any other
       plan, arrangement or agreement involving compensation or benefits,
       including any employment agreements, plans or arrangements providing for
       insurance coverage (including self-insured arrangements), retirement
       benefits, deferred compensation, profit-sharing, incentive compensation,
       stock options, stock purchases, phantom stock, stock appreciation, other
       stock-based awards, or post-retirement insurance, covering employees of
       Erisco and maintained or contributed to or entered into as of the date of
       this Agreement, or that has within the last six (6) years been maintained
       or contributed to or entered into by IMS or any of its subsidiaries or
       any IMS ERISA Affiliate (as defined below) under which IMS or any of its
       subsidiaries or any IMS ERISA Affiliate has any present or future
       obligation or liability with respect to any current or former employee,
       consultant, leased employee or director of IMS or any of its subsidiaries
       or any IMS ERISA Affiliate (collectively, the "IMS EMPLOYEE PLANS"). For
       purposes of this Agreement, "IMS ERISA AFFILIATE" shall mean any entity
       which is a member of (A) a "controlled group of corporations," as defined
       in Section 414(b) of the Code, (B) a group of entities under "common
       control," as defined in Section 414(c) of the Code, or (C) an "affiliated
       service group," as defined in Section 414(m) of the Code, or treasury
       regulations promulgated under Section 414(o) of the Code, any of which
       includes IMS or any of its subsidiaries. IMS has also made available to
       TriZetto copies of all IMS Employee Plans, and as applicable, all
       amendments thereto and written interpretations thereof, trust agreements,
       insurance contracts, current summary plan descriptions and summaries of
       material modification, the three (3) most recent annual reports
       (Form 5500, including, if applicable, Schedule B thereto), the most
       recent determination letter from the Internal Revenue Service, actuarial
       reports for the last three (3) years, all agreements with fiduciaries and
       service providers and all substantive correspondence with the Internal
       Revenue Service, the Department of Labor, the Pension Benefit Guaranty
       Corporation or any other governmental agency. All contributions due from
       IMS or any of its subsidiaries through the date hereof with respect to
       any of the IMS Employee Plans have been made as may have been required by
       ERISA and the Code or have been accrued in accordance with generally
       accepted accounting practices on IMS's or any such subsidiary's financial
       statements as of the date hereof. Each IMS Employee Plan has been
       maintained and operated in compliance with its terms and with the
       requirements prescribed by any and all applicable statutes, orders, rules
       and regulations, including, without limitation, ERISA and the Code,
       except for such noncompliance as would not have a Material Adverse Effect
       on Erisco. Erisco does not currently maintain, nor has it ever
       maintained, any "employee benefit plan", as defined in Section 3(3) of
       the Employee Retirement Income Security Act of 1974, as amended
       ("ERISA").

           (B) Section 3.8(b) of the IMS Disclosure Letter lists each Erisco
       employee who (i) has elected to continue participating in a group health
       plan of IMS pursuant to an election under the Consolidated Omnibus Budget
       Reconciliation Act of 1985, as amended ("COBRA") or (ii) has not made an
       election under COBRA but who is still eligible to make such election.

           (C) Section 3.8(c) of the IMS Disclosure Letter lists each Erisco
       employee who is receiving (i) long-term disability benefits or
       (ii) short-term disability benefits pursuant to an employee benefit plan
       maintained by IMS.

                                      A-7
<PAGE>
           (D) No work stoppage or labor strike against Erisco is pending,
       threatened or reasonably anticipated with respect to the Erisco
       employees. Neither IMS nor Erisco knows of any activities or proceedings
       of any labor union to organize any such Erisco employees. There are no
       actions, suits, claims, labor disputes or grievances pending, or, to the
       knowledge of IMS or Erisco, threatened or reasonably anticipated relating
       to any labor, safety or discrimination matters involving any Erisco
       employee, including, without limitation, charges of unfair labor
       practices or discrimination complaints, which, if adversely determined,
       would, individually or in the aggregate, result in any liability to
       Erisco having a Material Adverse Effect on Erisco. Neither IMS nor Erisco
       is presently, nor has it been, a party to, or bound by, any collective
       bargaining or union contract with respect to Erisco employees and no
       collective bargaining agreement is being negotiated by IMS or Erisco with
       respect to such employees.

           (E) Neither the execution and delivery of this Agreement nor the
       consummation of the transactions contemplated hereby (either alone or in
       conjunction with any other event) will (i) result in any payment
       constituting an "excess parachute payment" (within the meaning of
       Section 280G of the Code), (ii) result in forgiveness of indebtedness of
       any director, officer or Erisco employee under any IMS Employee Plan or
       otherwise, (iv) increase any benefits otherwise payable to any Erisco
       employee under any IMS Employee Plan, or (v) result in any acceleration
       of the time of payment or vesting of any benefits to any Erisco employee
       under any IMS Employee Plan or otherwise.

           (F) IMS and each of its Significant Subsidiaries (as defined in
       Regulation S-X under the Exchange Act): (i) are in compliance in all
       material respects with all applicable laws, agreements and contracts
       relating to employment, employment practices, wages, hours and terms and
       conditions of employment, including, but not limited to, employee
       compensation matters, but not including ERISA; (ii) have withheld and
       reported in all material respects all amounts required by law or by
       agreement to be withheld and reported with respect to wages, salaries and
       other payments to IMS and Erisco employees; (iii) is not liable in any
       material respect for any arrears of wages or any taxes or any penalty for
       failure to comply with any of the foregoing; and (iv) is not liable for
       any material payment to any trust or other fund or to any governmental or
       administrative authority, with respect to unemployment compensation
       benefits, social security or other benefits or obligations for IMS
       employees (other than payments to IMS Employee Plans and routine payments
       to be made in the normal course of business and consistent with past
       practice). There are no pending, threatened or reasonably anticipated
       material claims or actions against IMS or any of its subsidiaries under
       any worker's compensation policy or any uninsured long-term disability
       policy. To the knowledge of IMS or Erisco, no employee of Erisco has
       violated in any material respect any employment contract, nondisclosure
       agreement or noncompetition agreement by which such employee is bound due
       to such employee being employed by IMS or any of its subsidiaries and
       disclosing to IMS or using trade secrets or proprietary information of
       any other Person.

        3.9  ABSENCE OF UNDISCLOSED LIABILITIES.  At March 31, 2000 (the "ERISCO
    BALANCE SHEET DATE"), Erisco did not have any liabilities or obligations of
    any nature (matured or unmatured, fixed or contingent) which were not
    provided for or disclosed in notes to the balance sheet included in the
    Interim Financial Statements (as defined in Section 3.22), other than
    liabilities or obligations which, individually or in the aggregate, are not
    reasonably likely to have a Material Adverse Effect on Erisco.

        3.10  ABSENCE OF CERTAIN CHANGES OR EVENTS.  As of the date hereof,
    except as contemplated by this Agreement, since the Erisco Balance Sheet
    Date there has not occurred:

           (A) any change in the financial condition, properties, businesses or
       results of operations of Erisco that is reasonably likely to have a
       Material Adverse Effect on Erisco;

                                      A-8
<PAGE>
           (B) any amendments or changes in the Certificate of Incorporation or
       Bylaws of Erisco;

           (C) any damage, destruction or loss to physical property, whether
       covered by insurance or not, that is reasonably likely to constitute a
       Material Adverse Effect on Erisco;

           (D) any redemption, repurchase or other acquisition of shares of
       Erisco Common Stock by Erisco or any other Person;

           (E) any material increase in or modification of the compensation or
       benefits payable or to become payable by Erisco to any of its directors
       or employees, except in the ordinary course of business consistent with
       past practice;

           (F) any material increase in or modification of any bonus, pension,
       or employee benefit plan (including, but not limited to, the granting of
       stock options, restricted stock awards or stock appreciation rights) made
       to, for or with any of the Erisco employees, other than in the ordinary
       course of business consistent with past practice;

           (G) any acquisition or sale of a material amount of property or
       assets of Erisco, other than in the ordinary course of business
       consistent with past practice;

           (H) any alteration in any term of any outstanding security of Erisco;

           (I) any (A) incurrence, assumption or guarantee by Erisco of any debt
       for borrowed money other than inter-company borrowings, (B) issuance or
       sale of any securities convertible into or exchangeable for debt
       securities of Erisco or (C) issuance or sale of options or other rights
       to acquire from Erisco, directly or indirectly, debt securities of Erisco
       or any securities convertible into or exchangeable for any such debt
       securities;

           (J) any creation or assumption by Erisco of any mortgage, pledge,
       security interest or lien or other encumbrance on any asset;

           (K) any making of any loan, advance or capital contribution to or
       investment in any Person other than (i) travel loans or advances made in
       the ordinary course of business of Erisco, (ii) other loans and advances
       in an aggregate amount which does not exceed $500,000 outstanding at any
       time, (iii) purchases on the open market of liquid, publicly traded
       securities and (iv) intercompany loans, advances, capital contributions
       or investments;

           (L) any entering into, amendment of, relinquishment, termination or
       non-renewal by Erisco of any contract, lease transaction, commitment or
       other right or obligation other than in the ordinary course of business;

           (M) any material transfer or grant of a right under the Erisco IP
       Rights (as defined in Section 3.14 below), other than those transferred
       or granted in the ordinary course of business consistent with past
       practices;

           (N) any material labor dispute or charge of unfair labor practice
       (other than routine individual grievances), any material activity or
       proceeding by a labor union or representative thereof to organize any
       Erisco employees or any material campaign being conducted to solicit
       authorization from employees to be represented by such labor union or any
       material lockouts, strikes, slow downs, work stoppages or threats thereof
       by or with such employees;

           (O) any event, occurrence or development which is reasonably likely
       to have a Material Adverse Effect on Erisco;

           (P) any material change in the accounting practices of Erisco, except
       for any such change required by reason of a concurrent change in
       generally accepted accounting principles ("GAAP");

                                      A-9
<PAGE>
           (Q) any failure to make any material contribution due under any IMS
       or Erisco employee benefit plan in which a contribution could be required
       to be made by Erisco; or

           (R) any agreement or arrangement made by Erisco or IMS to take any
       action which, if taken prior to the date hereof, would have made any
       representation or warranty set forth in this Agreement untrue or
       incorrect as of the date when made unless otherwise disclosed.

        3.11  NO DEFAULTS.  To the knowledge of IMS or Erisco, neither Erisco
    nor any other party thereto is in breach or default under, and there exists
    no event, condition or occurrence which, after notice or lapse of time, or
    both, would constitute such a breach or default by Erisco or any other party
    under, any Contract to which Erisco is a party and which would, if
    terminated or modified, have, insofar as can reasonably be foreseen, a
    Material Adverse Effect on Erisco. Each of such Contracts is in full force
    and effect and is a legal, valid and binding agreement, enforceable in
    accordance with its terms, of each party thereto, subject to the Bankruptcy
    and Equity Exception.

        3.12  CERTAIN AGREEMENTS.  Neither the execution and delivery of the
    Basic Documents nor the consummation of the transactions contemplated
    thereby (either alone or in conjunction with other transactions currently
    contemplated) will result in any payment (including, without limitation,
    severance, unemployment compensation, golden parachute, bonus or otherwise)
    becoming due to any director or Erisco employee, under any IMS employee
    benefit plan or otherwise.

        3.13  TAXES.

           (A) Except as set forth in (or resulting from matters set forth in)
       the IMS Disclosure Letter or as is not, individually or in the aggregate,
       reasonably likely to have a Material Adverse Effect on Erisco:

               (I) Erisco and the IMS Group (as defined herein) have prepared in
           good faith and duly and timely filed (taking into account any
           extension of time within which to file) with the appropriate
           governmental agencies all franchise, income and all other material
           Tax (as defined below) returns and reports required to be filed on or
           before the Effective Time (collectively, "RETURNS") and all such
           filed Returns are complete and accurate in all material respects;

               (II) Erisco and the IMS Group have timely paid all Taxes that are
           shown as due on such filed Returns or that Erisco or any member of
           the IMS Group is obligated to withhold from amounts owing to any
           employee, creditor or third party, except with respect to matters
           contested in good faith;

              (III) as of the date hereof, there are not pending or, to the
           actual knowledge of the executive officers of Erisco or any member of
           the IMS Group, threatened in writing, any audits, examinations,
           investigations or other proceedings in respect of Taxes or Tax
           matters in respect of Erisco;

              (IV) Erisco is not liable for the Taxes of any Person (as defined
           below) (other than Persons who at the Effective Time are members of
           the affiliated group of corporations of which IMS is the common
           parent) pursuant to Section 1502 of the Code, by agreement or
           otherwise; and

               (V) Erisco has no liability with respect to material income,
           franchise or similar Taxes in excess of the amounts accrued in
           respect thereof that are reflected in the financial statements
           included in the IMS SEC Documents, other than any liability for
           unpaid Taxes that may have properly accrued since the Erisco Balance
           Sheet Date in connection with the operation of the business of Erisco
           or any of the members of the IMS Group in the ordinary course.

                                      A-10
<PAGE>
           (B) No payments to be made to any Erisco employee will as a result of
       consummation of the Merger be subject to the deduction limitations under
       Section 280G of the Code.

           (C) "IMS GROUP" shall mean any affiliated group (as defined in
       Section 1504(a) of the Code without regard to the limitations contained
       in Section 1504(b) of the Code) that includes IMS or any predecessor of
       or successor to IMS (or another such predecessor or successor).

           (D) "TAX" or "TAXES" shall mean all United States federal, state,
       provincial, local or foreign taxes and any other applicable duties,
       levies, fees, charges and assessments that are in the nature of a tax,
       including income, gross receipts, property, sales, use, license, excise,
       franchise, ad valorem, value-added, transfer, severance, stamp,
       occupation, premium, windfall profits, environmental (including taxes
       under Section 59A of the Code), customs, capital stock, real property,
       personal property, alternative or add-on minimum, estimated, social
       security payments, and health taxes and any deductibles relating to
       wages, salaries and benefits and payments to subcontractors, together
       with all interest, penalties and additions imposed with respect to such
       amounts.

           (E) "PERSON" shall mean any individual, corporation (including
       not-for-profit), general or limited partnership, limited liability
       company, joint venture, estate, trust, association, organization,
       Governmental Entity (as defined herein) or other entity of any kind or
       nature.

        3.14  INTELLECTUAL PROPERTY.

           (A) Erisco owns or has the right to use all material Intellectual
       Property Rights (as defined below) necessary or required for the
       operation of the business of Erisco as currently conducted (collectively,
       "ERISCO IP RIGHTS"), and has the right to sublicense the Erisco IP Rights
       that are licensed for the purpose of sublicensing or redistribution
       without material liability to, or any requirement of consent from, any
       other Person or party. The Erisco IP Rights constitute all Intellectual
       Property Rights necessary for the conduct of Erisco's business in the
       manner conducted immediately prior to the Closing. All Erisco IP Rights
       are either owned by Erisco free and clear of all liens and encumbrances
       or are used pursuant to a license agreement; each such license agreement
       is valid and enforceable and in full force and effect; Erisco is not in
       material default thereunder; and to the knowledge of IMS or Erisco, no
       corresponding licensor is in material default thereunder. None of the
       Erisco IP Rights infringes or otherwise conflicts with any Intellectual
       Property Rights or other right of any Person; there is no pending or, to
       the knowledge of IMS or Erisco, threatened (in writing) litigation,
       adversarial proceeding, administrative action or other challenge or claim
       relating to any Erisco IP Rights; there is no outstanding order relating
       to any Erisco IP Rights; to the knowledge of IMS or Erisco, there is
       currently no infringement by any Person of any Erisco IP Rights; and the
       Erisco IP Rights owned, used or possessed by Erisco are sufficient and
       adequate to conduct the business of Erisco to the full extent as such
       business is currently conducted. Section 3.14(a) of the IMS Disclosure
       Letter sets forth a complete and accurate list of all licenses to third
       parties with respect to the Erisco IP Rights that permit such third
       parties to provide outsourcing or application services or otherwise
       remotely host Software (as defined below) owned or licensed by Erisco.

           (B) IMS and/or Erisco have taken reasonable steps to protect,
       maintain and safeguard the Erisco IP Rights, including any Erisco IP
       Rights for which improper or unauthorized disclosure would impair its
       value or validity materially, and has executed and required appropriate
       nondisclosure agreements and made appropriate filings and registrations
       in connection with the foregoing.

                                      A-11
<PAGE>
           (C) A true and complete list of all material Software owned by Erisco
       has heretofore been made available to TriZetto. All of the Software owned
       by Erisco is Year 2000 Compliant (as defined below). A true and complete
       list of all material third party Software used by Erisco has heretofore
       been made available to TriZetto. To the knowledge of IMS or Erisco, all
       material third party Software currently used by Erisco is Year 2000
       Compliant. "Software" means and includes all computer programs, whether
       in source code, object code or other form (including without limitation
       any embedded in or otherwise constituting part of a computer hardware
       device), algorithms, edit controls, methodologies, applications, flow
       charts and any and all systems documentation (including, but not limited
       to, data entry and data processing procedures, report generation and
       quality control procedures), logic and designs for all programs, and file
       layouts and written narratives of all procedures used in the coding or
       maintenance of the foregoing.

           (D) A true and complete list of all material Databases (as defined
       below) owned by Erisco has heretofore been made available to TriZetto.
       All of the Databases owned by Erisco are Year 2000 Compliant. A true and
       complete list of all material third party Databases used by Erisco has
       heretofore been made available to TriZetto. To the knowledge of IMS or
       Erisco, all material third party Databases currently used by Erisco are
       Year 2000 Compliant. "Databases" means and includes all compilations of
       data and all related documentation and written narratives of all
       procedures used in connection with the collection, processing and
       distribution of data contained therein, together with information that
       describes the attributes of certain data and such data's relationship to
       other data, including, without limitation, (A) whether the data must be
       numerical, alphabetic, or alphanumeric, (B) range or type limitations of
       the data, (C) one-to-one, one-to-many, or many-to-many relationships with
       other data, (D) file layouts, and (E) data formats.

           (E) No material confidential or trade secret information of Erisco
       has been provided to any Person except subject to written confidentiality
       agreements, except for any such disclosure which has not resulted and is
       not reasonably likely to result in a Material Adverse Effect on Erisco.

           (F) Erisco has valid copyrights in all material copyrightable
       material whether or not registered with the U.S. copyright office,
       including all copyrights in the Erisco Products (as defined herein)
       containing material copyrightable material. Consummation of the
       transactions contemplated hereby will not alter or impair the validity of
       any such copyrights or copyright registrations.

           (G) (A) No third party (including any original equipment manufacturer
       or site license customer) has any right to manufacture, reproduce,
       distribute, sell, sublicense, market or exploit any of the products or
       services offered by Erisco (the "ERISCO PRODUCTS") or any adaptations,
       translations, or derivative works based on the Erisco Products, or any
       portion thereof; (B) neither IMS nor Erisco has granted to any third
       party any exclusive rights of any kind with respect to any of the Erisco
       Products, including territorial exclusivity or exclusivity with respect
       to particular versions, implementations or translations of any of the
       Erisco Products; and (C) neither IMS nor Erisco has granted any third
       party any right to market any product utilizing any Erisco Product under
       any "private label" arrangements pursuant to which Erisco is not
       identified as the source of such goods. Each document or instrument
       identified pursuant to this Section is listed in Section 3.14 of the IMS
       Disclosure Letter and true and correct copies of such documents or
       instruments have been furnished to TriZetto. No third party has any right
       to manufacture, reproduce, distribute, sublicense, market or exploit any
       works or materials of which any of the IMS Products are a derivative
       work.

                                      A-12
<PAGE>
           (H) Except as is not reasonably likely to have a Material Adverse
       Effect on Erisco, each of the Erisco Products: (A) substantially complies
       with all specifications set forth in any contract, agreement,
       advertisement or other promotional material for such products and with
       all other warranty requirements, other than bugs or fixes required or
       expected in the ordinary course of business and not otherwise material to
       Erisco's business; and (B) can be recreated from its associated source
       code and related documentation by reasonably experienced technical
       personnel without undue burden.

           (I) To the knowledge of IMS or Erisco, no Erisco employee is in
       violation of any term of any employment contract, patent disclosure
       agreement or any other contract or agreement relating to the relationship
       of any such employee with Erisco or any other party because of the nature
       of the business conducted by Erisco or proposed to be conducted by
       Erisco.

           (J) If Erisco is obligated to repair or replace products or services
       previously provided by Erisco that are not Year 2000 Compliant in order
       to meet Erisco's contractual obligations, to avoid personal injury or
       other liability, to avoid misrepresentation claims, or to satisfy any
       other obligations or requirements, to the knowledge of IMS or Erisco,
       Erisco has repaired or replaced those products and services to make them
       Year 2000 Compliant in all material respects.

           (K) All of the Software owned or used by Erisco complies in all
       material respects with the currently known and relevant provisions of the
       Health Insurance Portability and Accountability Act of 1996, as amended.

           (L) "YEAR 2000 COMPLIANT" means that (1) the products, services, or
       other item(s) at issue accurately process, provide and/or receive all
       date/time data (including calculating, comparing, sequencing, processing
       and outputting) within, from, into, and between centuries (including the
       twentieth and twenty-first centuries and the years 1999 and 2000),
       including leap year calculations, and (2) neither the performance nor the
       functionality of the products, services, and other item(s) at issue will
       be affected by any dates/times prior to, on, after, or spanning
       January 1, 2000. The design of the products, services, and other item(s)
       at issue to ensure compliance with the foregoing warranties and
       representations includes proper date/ time data century recognition and
       recognition of 1999 and 2000, calculations that accommodate single
       century and multi-century formulae and date/time values before, on,
       after, and spanning January 1, 2000, and date/time data interface values
       that reflect the century, 1999, and 2000. In particular, but without
       limitation, (i) no value for current date/ time will cause any error,
       interruption, or decreased performance in or for such product(s),
       service(s), and other item(s), (ii) all manipulations of date and time
       related data (including calculating, comparing, sequencing, processing,
       and outputting) will produce correct results for all valid dates and
       times when used independently or in combination with other products,
       services, and/or items, (iii) date/time elements in interfaces and data
       storage will specify the century to eliminate date ambiguity without
       human intervention, including leap year calculations, (iv) where any
       date/time element is represented without a century, the correct century
       will be unambiguous for all manipulations involving that element,
       (v) authorization codes, passwords, and zaps (purge functions) will
       function normally and in the same manner during, prior to, on and after
       January 1, 2000, including the manner in which they function with respect
       to expiration dates and CPU serial numbers, and (vi) supply of the
       product(s), service(s), and other item(s) will not be interrupted,
       delayed, decreased, or otherwise affected by the year 2000.

           (M) As used herein, the term "INTELLECTUAL PROPERTY RIGHTS" shall
       mean all worldwide industrial and intellectual property rights,
       including, without limitation, patents, patent applications, patent
       rights, trademarks, trademark applications, trade names, service marks,

                                      A-13
<PAGE>
       service mark applications, copyright, copyright applications, franchises,
       licenses, inventories, know-how, trade secrets, customer lists,
       proprietary processes and formulae, all source and object code,
       algorithms, architecture, structure, display screens, layouts,
       inventions, development tools, Software, Databases and all documentation
       and media constituting, describing or relating to the above, including,
       without limitation, manuals, memoranda and records.

        3.15  FEES AND EXPENSES.  Neither IMS nor Erisco has paid or become
    obligated to pay any fee or commission to any broker, finder or intermediary
    in connection with the transactions contemplated by this Agreement.

        3.16  ENVIRONMENTAL MATTERS.

           (A) Erisco, including all of its businesses and operations, is, and
       has been, operated in compliance with all laws, statutes, rules,
       regulations and other restrictions or requirements of any domestic or
       foreign governmental authority concerning or relating to industrial
       hygiene or protection of human health or the environment or to emissions,
       discharges or releases of pollutants, contaminants or other Hazardous
       Substances (as defined below) or wastes into the environment, including
       without limitation ambient air, surface water, ground water or land, or
       otherwise relating to the manufacture, processing, distribution, use,
       treatment, storage, disposal, transport or handling of pollutants,
       contaminants or other Hazardous Substances or wastes or the clean-up or
       other remediation thereof (collectively, "ENVIRONMENTAL LAWS"), except
       where the failure to so comply has not had, and is not reasonably likely
       to have, individually or in the aggregate, a Material Adverse Effect on
       Erisco. "HAZARDOUS SUBSTANCES" shall mean any substance regulated under
       any Environmental Laws including, without limitation, any substance which
       is: (A) petroleum, asbestos or asbestos-containing material, or
       polychlorinated biphenls; (B) defined, designated or listed as a
       "Hazardous Substance" pursuant to Sections 307 and 311 of the Clean Water
       Act, 33 U.S.C. SectionSection 1317, 1321, Section 101(14) of CERCLA, 42
       U.S.C. Section 9601; (C) listed in the United States Department of
       Transportation Hazardous Material Tables, 49 C.F.R. Section 172.101; or
       (D) defined, designated or listed as a "Hazardous Waste" under
       Section 1004(5) of the Resource and Conservation and Recovery Act, 42
       U.S.C. 6903(5).

           (B) Except as is not reasonably likely to have a Material Adverse
       Effect on Erisco, neither IMS nor Erisco has received notice or has
       knowledge of:

               (I) any claim, demand, investigation, enforcement action,
           response, removal, remedial action, statutory lien or other
           governmental or regulatory action instituted or threatened against
           Erisco or any real property which is now owned, used or leased to or
           by Erisco (the "ERISCO CURRENT REAL PROPERTY") or any real property
           which was, but is no longer, owned, used or leased to or by Erisco
           ("ERISCO FORMER REAL PROPERTY") pursuant to any Environmental Law;

               (II) any claim, demand notice, suit or action, made or threatened
           by any Person against Erisco, the Erisco Current Real Property or the
           Erisco Former Real Property relating to (A) any form of damage, loss
           or injury resulting from or claimed to result from, any Hazardous
           Substance on, about, beneath or arising from the Erisco Current Real
           Property or Erisco Former Real Property or (B) any alleged material
           violation of any Environmental Law by Erisco; or

              (III) any communication to or from any governmental authority
           alleging violations, liability or contamination arising out of or in
           connection with Hazardous Substances on, about, beneath, arising from
           or generated at the Erisco Current Real Property or Erisco Former
           Real Property, including without limitation, any notice of violation,
           citation,

                                      A-14
<PAGE>
           complaint, order, directive, request for information or response
           thereto, notice letter, demand letter or compliance schedule.

        3.17  INTERESTED PARTY TRANSACTIONS.  No officer or director of Erisco
    or any "affiliate" or "associate" (as those terms are defined in Rule 405
    promulgated under the Securities Act of 1933, as amended (the "SECURITIES
    ACT")) of any such person has had, either directly or indirectly, a material
    interest in: (i) any Person which purchases from or sells, licenses or
    furnishes to Erisco any material amount of goods, property, technology or
    intellectual or other property rights or services; or (ii) any material
    contract or agreement to which Erisco is a party or by which it may be bound
    or affected.

        3.18  BOARD APPROVAL.  The Board of Directors of Erisco has, as of the
    date hereof, unanimously (i) approved this Agreement and the Merger,
    (ii) determined that the Merger is in the best interests of its stockholders
    and (iii) submitted this Agreement to IMS, as its sole stockholder, for
    adoption and approval. The Board of Directors of IMS has, as of the date
    hereof, unanimously approved this Agreement and the transactions
    contemplated hereby.

        3.19  VOTE REQUIRED.  The approval of IMS is the only vote or approval
    of the holders of any class or series of capital stock of IMS or Erisco
    necessary to approve this Agreement and the Merger. IMS, as the sole
    stockholder of Erisco, has approved this Agreement and the Merger.

        3.20  RESTRICTIONS ON BUSINESS ACTIVITIES.  There is no material
    agreement, judgment, injunction, order or decree binding upon Erisco that
    has or could reasonably be expected to have the effect of prohibiting or
    materially impairing the conduct of its business as currently conducted or
    any acquisition of property by Erisco.

        3.21  TAKEOVER STATUTES.  No "fair price," "moratorium," "control share
    acquisition" or other similar anti-takeover statute or regulation (including
    Section 912 of the NYBCL and Section 203 of the DGCL) (each a "TAKEOVER
    STATUTE") or any anti-takeover provision in Erisco's certificate of
    incorporation or by-laws is applicable to Erisco, the Erisco Common Stock,
    the Merger or the other transactions contemplated by this Agreement.

        3.22  ERISCO FINANCIAL STATEMENTS.  Set forth in Section 3.22 of the IMS
    Disclosure Letter are an unaudited balance sheet, unaudited income statement
    and unaudited statement of cash flows of Erisco at and for the three fiscal
    years ended December 31, 1999 (including any notes and schedules thereto,
    the "FINANCIAL STATEMENTS") and an internally generated income statement and
    balance sheet at and for the three month period ended March 31, 2000
    (including any notes and schedules thereto, the "INTERIM FINANCIAL
    STATEMENTS"). The internal books and records of Erisco from which the
    Financial Statements and the Erisco Balance Sheet were prepared do not
    contain any information which is false or misleading in any respect that
    resulted in a material impact on the Financial Statements. The Financial
    Statements (i) were prepared in accordance with GAAP, applied on a
    consistent basis throughout the periods presented; and (ii) present fairly,
    in all material respects, the financial position and results of operations
    of Erisco at the dates and for the periods reflected therein. The Interim
    Financial Statements (i) were prepared on a basis consistent with those of
    the Financial Statements; and (ii) present fairly, in all material respects,
    the financial position and results of operations of Erisco at the dates and
    for the periods reflected therein.

        3.23  DEFERRED REVENUE.  The deferred revenue reflected on the Erisco
    Balance Sheet is based on Erisco's reasonable judgment and business
    practices, as established in accordance with GAAP consistently applied. All
    unearned revenue relating to contracts executed prior to the Closing Date
    have been properly recorded on Erisco's books and records on a timely basis
    and in the month in which Erisco received the cash payment or billed the
    customer.

                                      A-15
<PAGE>
        3.24  ACCOUNTS RECEIVABLE; WARRANTIES.  The accounts receivable
    reflected on the balance sheet included in the Interim Financial Statements
    are owned free and clear by Erisco and are based on Erisco's reasonable
    judgment and its normal credit review procedures, business practices and
    GAAP. Section 3.24 of the IMS Disclosure Letter (i) sets forth Erisco's
    warranty expense since January 1, 1998, and (ii) describes Erisco's product
    return policy and the forms of warranties given or made by Erisco with
    respect to products sold by Erisco since January 1, 1998. To the knowledge
    of IMS or Erisco, there is no fact or event which has occurred since
    January 1, 1998 which has formed or could reasonably be expected to form the
    basis of any material claim against Erisco, whether or not covered by
    insurance, for breach of any express or implied product warranty, other than
    warranty claims asserted by customers in the ordinary course of business and
    consistent with Erisco's past experience.

        3.25  INTERESTS IN REAL PROPERTY.  Section 3.25 of the IMS Disclosure
    Letter is a complete and correct list and brief description of all real
    property currently leased by Erisco. Erisco does not own any real property.
    All real property leases to which Erisco is a party are in full force and
    effect and are valid and binding on the parties thereto, assuming
    enforceability as to the parties other than Erisco and subject to the
    Bankruptcy and Equity Exception, and Erisco is not in material default of
    the provisions thereof. To the knowledge of IMS or Erisco, all improvements
    and fixtures made by or at the direction of Erisco on real properties leased
    by Erisco conform in all material respects to all applicable health, fire,
    safety, environmental, zoning and building laws and ordinances, and all
    materials, buildings, structures (or the space used by Erisco in such
    buildings or structures) and fixtures used by Erisco in the conduct of its
    business are in good operating condition and repair, ordinary wear and tear
    excepted, and are sufficient for the type and magnitude of their respective
    operations.

        3.26  PERSONAL PROPERTY.  Erisco has good and marketable title, free and
    clear of all material title defects, security interests, pledges, options,
    claims, liens and encumbrances, to all inventory and receivables and to any
    material item of machinery, equipment, or tangible personal property
    reflected on the Erisco Balance Sheet or used in the business by Erisco
    (regardless of whether reflected on the Erisco Balance Sheet). All the
    material machinery, equipment and other tangible personal property used in
    the business by Erisco is in good operating condition and repair, normal
    wear and tear excepted. At the Closing Date, Erisco will possess all of the
    material personal property wherever located used to conduct its business as
    conducted prior to the Closing.

        3.27  CONTRACTS.  Erisco is not a party to any:

           (A) employment, change in control or severance contract;

           (B) contract relating to the borrowing of money in excess of $100,000
       by Erisco, or the guaranty of any obligation for the borrowing of money
       by Erisco;

           (C) contract that involves the payment or receipt by Erisco of more
       than $200,000 over the remaining term of the contract;

           (D) contract that requires the consent of, or terminates or becomes
       terminable by, any person other than Erisco as a result of the
       transactions contemplated by this Agreement;

           (E) contracts that are otherwise material to the business of Erisco
       and are not for the purchase or sale of goods or services in the ordinary
       course of business;

           (F) contracts that have a remaining term of more than one year from
       the date of this Agreement.

        3.28  INSURANCE AND BANKING FACILITIES.  Section 3.28 of the Erisco
    Disclosure Letter comprises a complete and correct list of: (i) all
    contracts of insurance and indemnity of or relating to Erisco (except
    insurance related to employee benefits) in force at the date of this
    Agreement

                                      A-16
<PAGE>
    (including name of insurer or indemnitor, agent, annual charge, coverage and
    expiration date); (ii) the names and locations of all banks or depository
    organizations in which Erisco has accounts; and (iii) the names of all
    persons authorized to draw on such accounts. All premiums and other payments
    due with respect to all contracts of insurance or indemnity in force at the
    date hereof have been or will be paid, and neither IMS nor Erisco knows of
    any circumstance, which has caused, or might cause, any such contract to be
    canceled or terminated. There is no currently pending material claim by
    Erisco under any insurance policies of IMS or Erisco as to which coverage
    has been questioned, denied or disputed by the underwriters of such
    policies.

        3.29  POWER OF ATTORNEY AND SURETYSHIPS.  Erisco has no powers of
    attorney outstanding (other than a power of attorney issued in the ordinary
    course of business with respect to tax matters), and, except for obligations
    as an endorser of negotiable instruments incurred in the ordinary course of
    business, Erisco has no obligations or liabilities (absolute or contingent)
    as guarantor, surety, co-signer, endorser, co-maker, indemnitor or otherwise
    respecting the obligation of any other person.

        3.30  CUSTOMERS; PAYORS.  Section 3.30 of the IMS Disclosure Letter
    lists (i) Erisco's top 10 customers by billings and (ii) Erisco's top 10
    payors (collectively, the "CUSTOMERS"), by the revenues received by Erisco
    from each such Customer during fiscal 1999 and the percentage of Erisco's
    revenues during fiscal 1999 for which each such Customer is responsible. To
    the knowledge of IMS or Erisco, there are no oral or written notices or
    other indications from any of the Customers stating that such Customer
    intends to terminate its business relationship with Erisco or materially
    reduce the volume of business it does with Erisco.

    4.  REPRESENTATIONS AND WARRANTIES OF TRIZETTO.

    Except as set forth in a letter dated the date of this Agreement and
delivered by TriZetto to IMS concurrently herewith (the "TRIZETTO DISCLOSURE
LETTER"), TriZetto hereby represents and warrants to IMS that:

        4.1  ORGANIZATION; GOOD STANDING; QUALIFICATION AND POWER.  TriZetto and
    each of its subsidiaries, including Merger Sub (the "TRIZETTO SUBSIDIARIES")
    is a corporation duly organized, validly existing and in good standing under
    the laws of the state of its incorporation, has all requisite corporate
    power and authority to own, lease and operate its properties and to carry on
    its business as now being conducted, and is duly qualified and in good
    standing to do business in each jurisdiction in which the nature of its
    business or the ownership or leasing of its properties makes such
    qualification necessary, other than in such jurisdictions where the failure
    to qualify is not reasonably likely to have a Material Adverse Effect on
    TriZetto. The TriZetto Disclosure Letter sets forth a correct and complete
    list of the TriZetto Subsidiaries. TriZetto has made available to IMS or its
    counsel complete and correct copies of the certificates or articles of
    incorporation and bylaws of TriZetto and each of the TriZetto Subsidiaries,
    in each case as amended to the date of this Agreement.

        4.2  CAPITAL STRUCTURE.

           (A)  STOCK AND OPTIONS.  The authorized capital stock of TriZetto
       consists of 40,000,000 shares of TriZetto Common Stock and 5,000,000
       shares of Preferred Stock, $0.001 par value (the "TRIZETTO PREFERRED
       STOCK"). At the close of business on May 12, 2000, 21,309,330 shares of
       TriZetto Common Stock were issued and outstanding, no shares of TriZetto
       Common Stock were held by TriZetto in its treasury and 3,332,943 shares
       of TriZetto Common Stock were reserved for issuance upon the exercise of
       outstanding options to acquire shares of TriZetto's capital stock (the
       "TRIZETTO OPTIONS"). No shares of TriZetto Preferred Stock are issued or
       outstanding. All outstanding shares of TriZetto Common Stock are validly
       issued, fully paid and nonassessable and not subject to preemptive
       rights. All outstanding shares of the capital

                                      A-17
<PAGE>
       stock of each of the TriZetto Subsidiaries are validly issued, fully paid
       and nonassessable and are owned by TriZetto or one of the TriZetto
       Subsidiaries free and clear of any liens, security interests, pledges,
       agreements, claims, charges or encumbrances. TriZetto has made available
       to IMS a correct and complete copy of its 1998 Stock Option Plan (the
       "TRIZETTO PLAN") and a correct and complete list of each TriZetto Option
       outstanding as of the date hereof, including the name of the holder of
       such TriZetto Option, the TriZetto option plan pursuant to which such
       TriZetto Option was issued, the security and number of shares covered by
       such TriZetto Option, the per share exercise price of such TriZetto
       Option and the vesting schedule applicable to such TriZetto Option. The
       shares of TriZetto Common Stock issuable pursuant to the terms of this
       Agreement will be duly authorized, validly issued, fully paid and
       nonassessable and free and clear of any lien, pledge, security interest,
       claim or other encumbrance, except for restrictions on transfer pursuant
       to the Stockholder Agreement (as defined in Section 7.4) or under federal
       or state securities laws.

           (B)  NO OTHER COMMITMENTS.  Except for the TriZetto Options disclosed
       pursuant to Section 4.2(a) above, there are no options, warrants, calls,
       rights, commitments, conversion rights or agreements of any character to
       which TriZetto or any of the TriZetto Subsidiaries is a party or by which
       TriZetto or any of the TriZetto Subsidiaries is bound obligating TriZetto
       or any of the TriZetto Subsidiaries to issue, deliver or sell, or cause
       to be issued, delivered or sold, any shares of capital stock of TriZetto
       or any of the TriZetto Subsidiaries or securities convertible into or
       exchangeable for shares of capital stock of TriZetto or any of the
       TriZetto Subsidiaries, or obligating TriZetto or any of the TriZetto
       subsidiaries to grant, extend or enter into any such option, warrant,
       call, right, commitment, conversion right or agreement.

        4.3  AUTHORITY.

           (A)  CORPORATE ACTION.  Each of TriZetto and Merger Sub has all
       requisite corporate power and authority to enter into each of the Basic
       Documents to which it is a party and, subject to approval of the TriZetto
       Proposal (as defined in Section 6.4) by the stockholders of TriZetto, to
       perform its obligations thereunder and to consummate the Merger and the
       other transactions contemplated by the Basic Documents. The execution and
       delivery of each of the Basic Documents to which it is a party by
       TriZetto and Merger Sub and, subject to approval by the stockholders of
       TriZetto of the TriZetto Proposal, the consummation by TriZetto and
       Merger Sub of the Merger and the other transactions contemplated by the
       Basic Documents have been duly authorized by all necessary corporate
       action on the part of TriZetto and Merger Sub. Each of the Basic
       Documents to which it is a party has been, or will when executed be, duly
       executed and delivered by each of TriZetto and Merger Sub and is, or when
       executed will be, the valid and binding obligation of each of TriZetto
       and Merger Sub, enforceable in accordance with its terms, except that
       such enforceability may be subject to the Bankruptcy and Equity
       Exception.

           (B)  NO CONFLICT.  Neither the execution, delivery and performance of
       the Basic Documents nor the consummation of the transactions contemplated
       thereby nor compliance with the provisions hereof will: (i) conflict
       with, or result in any violations of, or cause a breach or default (with
       or without notice or lapse of time, or both) under, or give rise to a
       right of termination, amendment, cancellation or acceleration of any
       obligation contained in, or the loss of any material benefit under, or
       result in the creation of any lien, security interest, charge or
       encumbrance upon any of the material properties or assets of TriZetto or
       any of the TriZetto Subsidiaries under, any term, condition or provision
       of (A) the certificate or articles of incorporation or bylaws of TriZetto
       or any of the TriZetto Subsidiaries or (B) any Contract, permit,
       judgment, order, decree, statute, law, ordinance, rule or regulation
       applicable to TriZetto or any of the TriZetto Subsidiaries or their
       respective properties or assets, other than any such conflicts,
       violations, defaults, losses, liens, security interests, charges or
       encumbrances

                                      A-18
<PAGE>
       which, individually or in the aggregate, is not reasonably likely to have
       a Material Adverse Effect on TriZetto; or (ii) require the affirmative
       vote of the holders of greater than a majority of the issued and
       outstanding shares of TriZetto Common Stock.

           (C)  GOVERNMENTAL CONSENTS.  No consent, approval, order or
       authorization of, or registration, declaration or filing with, any
       Governmental Entity is required to be obtained by TriZetto or any of the
       TriZetto Subsidiaries in connection with the execution and delivery of
       the Basic Documents or the consummation of the transactions contemplated
       hereby, except for: (i) the filing with the SEC of the Proxy Statement
       and such other reports and information under the Exchange Act and the
       rules and regulations promulgated by the SEC thereunder as may be
       required in connection with this Agreement and the transactions
       contemplated hereby; (ii) the filing of the NY Certificate of Merger with
       the Secretary of State of the State of New York, the DE Certificate of
       Merger with the Secretary of State of the State of Delaware, and
       appropriate documents with the relevant authorities of other states in
       which TriZetto is qualified to do business; (iii) such filings,
       authorizations, orders and approvals as may be required under foreign
       securities laws, state securities laws and the rules of the Nasdaq;
       (iv) such filings and notifications as may be necessary under the HSR Act
       and applicable foreign antitrust laws; and (v) where the failure to
       obtain or make such consents, approvals, orders or authorizations,
       registrations, declarations or filings would not prevent or delay the
       consummation of the Merger or otherwise prevent TriZetto or Merger Sub
       from performing its obligations under this Agreement and is not
       reasonably likely to have a Material Adverse Effect on TriZetto.

        4.4  SEC DOCUMENTS.

           (A)  SEC REPORTS.  TriZetto has made available to IMS or its counsel
       correct and complete copies of each report, schedule, registration
       statement and definitive proxy statement filed by TriZetto with the SEC
       on or after October 7, 1999 (the "TRIZETTO SEC DOCUMENTS"), which are all
       the documents (other than preliminary material) that TriZetto was
       required to file with the SEC on or after such date. As of their
       respective dates or, in the case of registration statements, their
       effective dates (or if amended or superseded a filing prior to the date
       of this Agreement, then on the date of such filing), none of the TriZetto
       SEC Documents (including all exhibits and schedules thereto and documents
       incorporated by reference therein) contained any untrue statement of a
       material fact or omitted to state a material fact required to be stated
       therein or necessary in order to make the statements therein, in light of
       the circumstances under which they were made, not misleading, and the
       TriZetto SEC Documents complied when filed in all material respects with
       the then applicable requirements of the Securities Act or the Exchange
       Act, as the case may be, and the rules and regulations promulgated by the
       SEC thereunder. TriZetto has filed all documents and agreements which
       were required to be filed as exhibits to the TriZetto SEC Documents.

           (B)  FINANCIAL STATEMENTS.  The financial statements of TriZetto
       included in the TriZetto SEC Documents complied as to form in all
       material respects with the then applicable accounting requirements and
       the published rules and regulations of the SEC with respect thereto, were
       prepared in accordance with generally accepted accounting principles
       applied on a consistent basis during the periods involved (except as may
       have been indicated in the notes thereto or, in the case of the unaudited
       statements, as permitted by Form 10-Q promulgated by the SEC) and fairly
       present (subject, in the case of the unaudited statements, to normal,
       year-end audit adjustments) the consolidated financial position of
       TriZetto and its consolidated TriZetto Subsidiaries as at the respective
       dates thereof and the consolidated results of their operations and cash
       flows for the respective periods then ended.

                                      A-19
<PAGE>
        4.5  INFORMATION SUPPLIED.  None of the information supplied or to be
    supplied by TriZetto for inclusion or incorporation by reference in the
    Proxy Statement will, at the date the Proxy Statement is mailed to the
    stockholders of TriZetto and at the time of the TriZetto Stockholders
    Meeting, contain any untrue statement of a material fact or omit to state
    any material fact required to be stated therein or necessary to make the
    statements therein, in light of the circumstances under which they are made,
    not misleading. The Proxy Statement will comply as to form in all material
    respects with the provisions of the Exchange Act and the rules and
    regulations promulgated by the SEC thereunder.

        4.6  COMPLIANCE WITH APPLICABLE LAWS.  Except as disclosed in the
    TriZetto SEC Documents filed prior to the date of this Agreement, the
    businesses of TriZetto and the TriZetto Subsidiaries have not been, and are
    not being, conducted in violation of any federal, state, local or foreign
    law, ordinance, regulation, rule or order of any Governmental Entity where
    such violation is reasonably likely to have a Material Adverse Effect on
    TriZetto. Except as disclosed in the TriZetto SEC Documents filed prior to
    the date of this Agreement, TriZetto has not been notified by any
    Governmental Entity that any investigation or review with respect to
    TriZetto or any of the TriZetto Subsidiaries is pending or threatened, nor
    has any Governmental Entity notified TriZetto of its intention to conduct
    the same. TriZetto and the TriZetto Subsidiaries have all material permits,
    licenses and franchises from Governmental Entities required to conduct their
    businesses as now being conducted, except for those whose absence is not
    reasonably likely to have a Material Adverse Effect on TriZetto.

        4.7  LITIGATION.  Except as disclosed in the TriZetto SEC Documents
    filed prior to the date of this Agreement, there is no suit, action,
    arbitration, demand, claim or proceeding pending or, to the best knowledge
    of TriZetto, threatened against TriZetto or any of the TriZetto
    Subsidiaries; nor is there any judgment, decree, injunction, rule or order
    of any Governmental Entity or arbitrator outstanding against TriZetto or any
    of the TriZetto Subsidiaries that, individually or in the aggregate, is
    reasonably likely to have a Material Adverse Effect on TriZetto. TriZetto
    has made available to IMS or its counsel correct and complete copies of all
    correspondence prepared by its counsel for TriZetto's auditors in connection
    with the last two (2) completed audits of TriZetto's financial statements
    and any such correspondence since the date of the last such audit.

        4.8  ERISA AND OTHER COMPLIANCE.

           (A) TriZetto has made available to IMS a list of (i) each "employee
       benefit plan," as defined in Section 3(3) of ERISA, and (ii) any other
       plan, arrangement or agreement involving direct or indirect compensation
       or benefits, including any employment agreements, plans or arrangements
       providing for insurance coverage (including self-insured arrangements),
       retirement benefits, deferred compensation, profit-sharing, incentive
       compensation, stock options, stock purchases, phantom stock, stock
       appreciation, other stock-based awards, or post-retirement insurance,
       maintained or contributed to or entered into as of the date of this
       Agreement, or that has within the last six (6) years been maintained or
       contributed to or entered into by TriZetto or any of the TriZetto
       Subsidiaries or any TriZetto ERISA Affiliate (as defined below) under
       which TriZetto or any of the TriZetto Subsidiaries or any TriZetto ERISA
       Affiliate has any present or future obligation or liability with respect
       to any current or former employee, consultant, leased employee or
       director of TriZetto or any of the TriZetto Subsidiaries or any TriZetto
       ERISA Affiliate (collectively, the "TRIZETTO EMPLOYEE PLANS"). For
       purposes of this Agreement, "TRIZETTO ERISA AFFILIATE" shall mean any
       entity which is a member of (A) a "controlled group of corporations," as
       defined in Section 414(b) of the Code, (B) a group of entities under
       "common control," as defined in Section 414(c) of the Code, or (C) an
       "affiliated service group," as defined in Section 414(m) of the Code, or
       treasury regulations promulgated under Section 414(o) of the Code, any of
       which includes TriZetto or any of the TriZetto Subsidiaries. TriZetto has
       also made available to IMS copies of

                                      A-20
<PAGE>
       all TriZetto Employee Plans, and as applicable, all amendments thereto
       and written interpretations thereof, trust agreements, insurance
       contracts, current summary plan descriptions and any summaries of
       material modification, the three (3) most recent annual reports
       (Form 5500, including, if applicable, Schedule B thereto), the most
       recent determination letter from the Internal Revenue Service, actuarial
       reports for the last three (3) years, all agreements with fiduciaries and
       service providers and all substantive correspondence with the Internal
       Revenue Service, the Department of Labor, the Pension Benefit Guaranty
       Corporation or any other governmental agency. All contributions due from
       TriZetto or any of the TriZetto Subsidiaries through the date hereof with
       respect to any of the TriZetto Employee Plans have been made as may have
       been required by ERISA and the Code or have been accrued in accordance
       with generally accepted accounting practices on TriZetto's or any such
       TriZetto Subsidiary's financial statements as of the date hereof. Each
       TriZetto Employee Plan has been maintained and operated in compliance
       with its terms and with the requirements prescribed by any and all
       applicable statutes, orders, rules and regulations, including, without
       limitation, ERISA and the Code, except for such noncompliance as would
       not have a Material Adverse Effect on TriZetto.

           (B) No TriZetto Employee Plan is subject to Title IV of ERISA. No
       TriZetto Employee Plan is a "multiemployer plan," as defined in
       Section 3(37) of ERISA. No "prohibited transaction," as defined in
       Section 406 of ERISA or Section 4975 of the Code, has occurred with
       respect to any TriZetto Employee Plan which is covered by Title I of
       ERISA which, assuming the taxable period of such transaction expired as
       of the date hereof, could subject TriZetto or any TriZetto Subsidiary to
       a tax or penalty that would have a Material Adverse Effect on TriZetto.
       To the knowledge of TriZetto, there are no pending, threatened or
       anticipated claims (other than routine claims for benefits) by, on behalf
       of or against any of the TriZetto Employee Plans which could result in a
       liability that would have a Material Adverse Effect on TriZetto. No
       TriZetto Employee Plan, either individually or collectively, provides for
       any payment by TriZetto or any TriZetto Subsidiary that would not be
       deductible under Code Sections 162(a)(1), 162(m) or 404.

           (C) Any TriZetto Employee Plan which is intended to be qualified
       under Section 401(a) of the Code has received a favorable determination
       letter from the Internal Revenue Service, and TriZetto is not aware of
       any circumstances likely to result in revocation of any such favorable
       determination letter.

           (D) No TriZetto Employee Plan provides benefits, including, without
       limitation, death or medical benefits (whether or not insured), with
       respect to current or former employees of TriZetto or any TriZetto
       Subsidiary beyond their retirement or other termination of service, other
       than (i) coverage mandated by applicable law, (ii) death benefits or
       retirement benefits under a TriZetto Employee Plan that is an "employee
       pension benefit plan" within the meaning of Section 3(2) of ERISA,
       (iii) deferred compensation benefits under a plan, which are accrued as
       liabilities on the books of TriZetto or any TriZetto Subsidiary, or
       (iv) benefits the full cost of which is borne by the current or former
       employee (or his beneficiary). All such TriZetto Employee Plans may be
       amended or terminated at any time without causing TriZetto or any
       TriZetto Subsidiary to incur liability having a Material Adverse Effect
       on TriZetto.

           (E) Neither the execution and delivery of this Agreement nor the
       consummation of the transactions contemplated hereby (either alone or in
       conjunction with any other event) will (i) restrict or prohibit TriZetto
       or any TriZetto Subsidiary from amending any TriZetto Employee Plan,
       (ii) result in any payment constituting an "excess parachute payment"
       (within the meaning of Section 280G of the Code), (iii) result in
       forgiveness of indebtedness to any director, officer or employee of
       TriZetto or any TriZetto Subsidiary under any TriZetto Employee Plan or
       otherwise, (iv) increase any benefits otherwise payable under any
       TriZetto

                                      A-21
<PAGE>
       Employee Plan or (v) result in any acceleration of the time of payment or
       vesting of any benefits under any TriZetto Employee Plan or otherwise.

           (F) TriZetto and each TriZetto Subsidiary is: (i) in compliance in
       all material respects with all applicable laws, agreements and contracts
       relating to employment, employment practices, wages, hours and terms and
       conditions of employment, including, but not limited to, employee
       compensation matters, but not including ERISA; (ii) has withheld and
       reported in all material respects all amounts required by law or by
       agreement to be withheld and reported with respect to wages, salaries and
       other payments to TriZetto employees; (iii) is not liable in any material
       respect for any arrears of wages or any taxes or any penalty for failure
       to comply with any of the foregoing; and (iv) is not liable for any
       material payment to any trust or other fund or to any governmental or
       administrative authority, with respect to unemployment compensation
       benefits, social security or other benefits or obligations for TriZetto
       employees (other than payments to TriZetto Employee Plans and routine
       payments to be made in the normal course of business and consistent with
       past practice). There are no pending, threatened or reasonably
       anticipated material claims or actions against TriZetto or any TriZetto
       Subsidiary under any worker's compensation policy or any uninsured
       long-term disability policy. To TriZetto's knowledge, no employee of
       TriZetto has violated in any material respect any employment contract,
       nondisclosure agreement or noncompetition agreement by which such
       employee is bound due to such employee being employed by TriZetto or any
       TriZetto Subsidiary and disclosing to TriZetto or using trade secrets or
       proprietary information of any other Person.

           (G) No work stoppage or labor strike against TriZetto or any TriZetto
       Subsidiary is pending, threatened or reasonably anticipated with respect
       to TriZetto employees. TriZetto does not know of any activities or
       proceedings of any labor union to organize any such TriZetto employees.
       There are no actions, suits, claims, labor disputes or grievances
       pending, or, to the knowledge of TriZetto, threatened or reasonably
       anticipated relating to any labor, safety or discrimination matters
       involving any TriZetto employee, including, without limitation, charges
       of unfair labor practices or discrimination complaints, which, if
       adversely determined, would, individually or in the aggregate, result in
       any liability to TriZetto or any TriZetto Subsidiary having a Material
       Adverse Effect on TriZetto. Neither TriZetto nor any TriZetto Subsidiary
       is presently, nor has it been, a party to, or bound by, any collective
       bargaining or union contract with respect to TriZetto employees and no
       collective bargaining agreement is being negotiated by TriZetto or any
       TriZetto Subsidiary with respect to such employees.

        4.9  ABSENCE OF UNDISCLOSED LIABILITIES.  At March 31, 2000 (the
    "TRIZETTO BALANCE SHEET DATE"), neither TriZetto nor any of the TriZetto
    Subsidiaries had any liabilities or obligations of any nature (matured or
    unmatured, fixed or contingent) which were not provided for or disclosed in
    notes to the consolidated balance sheet of TriZetto at the TriZetto Balance
    Sheet Date, a copy of which has been delivered to IMS (the "TRIZETTO BALANCE
    SHEET"), other than liabilities or obligations which, individually or in the
    aggregate, are not reasonably likely to have a Material Adverse Effect on
    TriZetto.

        4.10  ABSENCE OF CERTAIN CHANGES OR EVENTS.  As of the date hereof,
    except as disclosed in the TriZetto SEC Documents filed prior to the date of
    this Agreement or as contemplated by this Agreement, since the TriZetto
    Balance Sheet Date there has not occurred:

           (A) any change in the financial condition, properties, businesses or
       results of operations of TriZetto and the TriZetto Subsidiaries taken as
       a whole that is reasonably likely to constitute a Material Adverse Effect
       on TriZetto;

           (B) any amendments or changes in the Certificate of Incorporation or
       Bylaws of TriZetto;

                                      A-22
<PAGE>
           (C) any damage destruction or loss to physical property, whether
       covered by insurance or not, that is reasonably likely to constitute a
       Material Adverse Effect on TriZetto;

           (D) any redemption, repurchase or other acquisition of shares of
       TriZetto Common Stock by TriZetto (other than pursuant to arrangements
       with terminated employees or consultants), or any declaration, setting
       aside or payment of any dividend or other distribution (whether in cash,
       stock or property) with respect to TriZetto Common Stock;

           (E) any material increase in or modification of the compensation or
       benefits payable or to become payable by TriZetto to any of its directors
       or employees, except in the ordinary course of business consistent with
       past practice;

           (F) any material increase in or modification of any bonus, pension,
       insurance or TriZetto Employee Plan or TriZetto Benefit Arrangement
       (including, but not limited to, the granting of stock options, restricted
       stock awards or stock appreciation rights) made to, for or with any of
       its employees, other than in the ordinary course of business consistent
       with past practice;

           (G) any acquisition or sale of a material amount of property or
       assets of TriZetto, other than in the ordinary course of business
       consistent with past practice and those contemplated by this Agreement;

           (H) any alteration in any term of any outstanding security of
       TriZetto;

           (I) any (A) incurrence, assumption or guarantee by TriZetto of any
       debt for borrowed money; (B) issuance or sale of any securities
       convertible into or exchangeable for debt securities of TriZetto; or
       (C) issuance or sale of options or other rights to acquire from TriZetto,
       directly or indirectly, debt securities of TriZetto or any securities
       convertible into or exchangeable for any such debt securities;

           (J) any creation or assumption by TriZetto of any mortgage, pledge,
       security interest or lien or other encumbrance on any asset;

           (K) any making of any loan, advance or capital contribution to or
       investment in any Person other than (i) travel loans or advances made in
       the ordinary course of business of TriZetto, (ii) other loans and
       advances in an aggregate amount which does not exceed $500,000
       outstanding at any time and (iii) purchases on the open market of liquid,
       publicly traded securities;

           (L) any entering into, amendment of, relinquishment, termination or
       non-renewal by TriZetto of any contract, lease transaction, commitment or
       other right or obligation other than in the ordinary course of business;

           (M) any material transfer or grant of a right under the TriZetto IP
       Rights (as defined in Section 4.14 below), other than those transferred
       or granted in the ordinary course of business consistent with past
       practices;

           (N) any material labor dispute or charge of unfair labor practice
       (other than routine individual grievances), any material activity or
       proceeding by a labor union or representative thereof to organize any
       employees of TriZetto, any material campaign being conducted to solicit
       authorization from employees to be represented by such labor union or any
       material lockouts, strikes, slow downs, work stoppages or threats thereof
       by or with such employees;

           (O) any failure to make any material contribution due under any of
       the TriZetto Employee Plans;

           (P) any event, occurrence or development which is reasonably likely
       to have a Material Adverse Effect on TriZetto;

                                      A-23
<PAGE>
           (Q) any material change in the accounting practices of TriZetto,
       except for any such change required by reason of a concurrent change in
       GAAP; or

           (R) any agreement or arrangement made by TriZetto to take any action
       which, if taken prior to the date hereof, would have made any
       representation or warranty set forth in this Agreement untrue or
       incorrect as of the date when made unless otherwise disclosed.

        4.11  NO DEFAULTS.  Except as disclosed in the TriZetto SEC Documents
    filed prior to the date of this Agreement, to TriZetto's knowledge, neither
    it nor any of the TriZetto Subsidiaries nor any other party thereto is in
    breach or default under, and there exists no event, condition or occurrence
    which, after notice or lapse of time, or both, would constitute such a
    breach or default by TriZetto, any of the TriZetto Subsidiaries or any other
    party under, any Contract to which TriZetto or any of the TriZetto
    Subsidiaries is a party and which would, if terminated or modified, have,
    insofar as can reasonably be foreseen, a Material Adverse Effect on
    TriZetto. Each of such Contracts is in full force and effect and is a legal,
    valid and binding agreement, enforceable in accordance with its terms, of
    each party thereto, subject to the Bankruptcy and Equity Exception.

        4.12  CERTAIN AGREEMENTS.  Neither the execution and delivery of the
    Basic Documents nor the consummation of the transactions contemplated
    thereby (either alone or in conjunction with other transactions currently
    contemplated) will (i) result in any payment (including, without limitation,
    severance, unemployment compensation, golden parachute, bonus or otherwise)
    becoming due to any director or employee of TriZetto or any of the TriZetto
    Subsidiaries from TriZetto or any of the TriZetto Subsidiaries, under any
    TriZetto Employee Plan or otherwise, (ii) materially increase any benefits
    otherwise payable under any TriZetto Employee Plan or (iii) result in the
    acceleration of the time of payment or vesting of any such benefits.

        4.13  TAXES.

           (A) Except as set forth in (or resulting from matters set forth in)
       the TriZetto SEC Documents or as is not, individually or in the
       aggregate, reasonably likely to have a Material Adverse Effect on
       TriZetto:

               (I) TriZetto and each of the TriZetto Subsidiaries have prepared
           in good faith and duly and timely filed (taking into account any
           extension of time within which to file) with the appropriate
           governmental agencies all Returns and all such filed Returns are
           complete and accurate in all material respects;

               (II) TriZetto and each of the TriZetto Subsidiaries have timely
           paid all Taxes that are shown as due on such filed Returns or that
           TriZetto or any of the TriZetto Subsidiaries is obligated to withhold
           from amounts owing to any employee, creditor or third party, except
           with respect to matters contested in good faith;

              (III) as of the date hereof, there are not pending or, to the
           actual knowledge of the executive officers of TriZetto or any of the
           TriZetto Subsidiaries, threatened in writing, any audits,
           examinations, investigations or other proceedings in respect of Taxes
           or Tax matters;

              (IV) neither TriZetto nor any of the TriZetto Subsidiaries is or
           may be liable for the Taxes of any Person (other than Persons who at
           the Effective Time are members of the affiliated group of
           corporations of which TriZetto is the common parent) pursuant to
           Section 1502 of the Code, by agreement or otherwise; and

               (V) neither TriZetto nor any of the TriZetto Subsidiaries has any
           liability with respect to material income, franchise or similar Taxes
           in excess of the amounts accrued in respect thereof that are
           reflected in the financial statements included in the TriZetto SEC
           Documents other than any liability for unpaid Taxes that may have
           properly accrued since

                                      A-24
<PAGE>
           the TriZetto Balance Sheet Date in connection with the operation of
           the business of TriZetto or any of the TriZetto Subsidiaries in the
           ordinary course.

           (B) No payments to be made to any of the officers and employees of
       TriZetto or any of the TriZetto Subsidiaries will as a result of
       consummation of the Merger be subject to the deduction limitations under
       Section 280G of the Code.

        4.14  INTELLECTUAL PROPERTY.

           (A) TriZetto and the TriZetto Subsidiaries own or have the right to
       use all material Intellectual Property Rights necessary or required for
       the operation of the business of TriZetto as currently conducted or to
       products or services currently under development by TriZetto and the
       TriZetto Subsidiaries (collectively, "TRIZETTO IP RIGHTS"), and have the
       right to use, license, sublicense or assign the same without material
       liability to, or any requirement of consent from, any other Person or
       party. The TriZetto IP Rights constitute all Intellectual Property Rights
       necessary for the conduct of their businesses in the manner conducted
       immediately prior to the Closing. All TriZetto IP Rights are either owned
       by TriZetto and the TriZetto Subsidiaries free and clear of all liens and
       encumbrances or are used pursuant to a license agreement; each such
       license agreement is valid and enforceable and in full force and effect;
       neither TriZetto nor any TriZetto Subsidiary is in material default
       thereunder; and to the knowledge of TriZetto, no corresponding licensor
       is in material default thereunder. None of the TriZetto IP Rights
       infringes or otherwise conflicts with any Intellectual Property Rights or
       other right of any Person; there is no pending or, to the knowledge of
       TriZetto, threatened (in writing) litigation, adversarial proceeding,
       administrative action or other challenge or claim relating to any
       TriZetto IP Rights; there is no outstanding order relating to any
       TriZetto IP Rights; to the knowledge of TriZetto, there is currently no
       infringement by any Person of any TriZetto IP Rights; and the TriZetto IP
       Rights owned, used or possessed by TriZetto and the TriZetto Subsidiaries
       are sufficient and adequate to conduct the business of TriZetto and the
       TriZetto Subsidiaries to the full extent as such business is currently
       conducted.

           (B) TriZetto and the TriZetto Subsidiaries have taken reasonable
       steps to protect, maintain and safeguard their respective TriZetto IP
       Rights, including any TriZetto IP Rights for which improper or
       unauthorized disclosure would impair its value or validity materially,
       and has executed and required appropriate nondisclosure agreements and
       made appropriate filings and registrations in connection with the
       foregoing.

           (C) A true and complete list of all material Software owned by
       TriZetto and the TriZetto Subsidiaries has heretofore been made available
       to IMS. All of the Software owned by TriZetto and the TriZetto
       Subsidiaries is Year 2000 Compliant. A true and complete list of all
       material third party Software used by TriZetto and the TriZetto
       Subsidiaries has heretofore been made available to IMS. To the knowledge
       of TriZetto, all material third party Software currently used by TriZetto
       and the TriZetto Subsidiaries is Year 2000 Compliant.

           (D) A true and complete list of all material Databases owned by
       TriZetto and the TriZetto Subsidiaries has heretofore been made available
       to IMS. All of the Databases owned by TriZetto and the TriZetto
       Subsidiaries are Year 2000 Compliant. A true and complete list of all
       material third party Databases used by TriZetto and the TriZetto
       Subsidiaries has heretofore been made available to IMS. To the knowledge
       of TriZetto, all material third party Databases currently used by
       TriZetto and the TriZetto Subsidiaries are Year 2000 Compliant.

           (E) No material confidential or trade secret information of TriZetto
       or any TriZetto Subsidiary has been provided to any Person except subject
       to written confidentiality agreements, except for any such disclosure
       which has not resulted and is not reasonably likely to result in a
       Material Adverse Effect on TriZetto.

                                      A-25
<PAGE>
           (F) TriZetto and the TriZetto Subsidiaries have valid copyrights in
       all material copyrightable material whether or not registered with the
       U.S. copyright office, including all copyrights in the TriZetto Products
       (as defined herein) containing material copyrightable material.
       Consummation of the transactions contemplated hereby will not alter or
       impair the validity of any such copyrights or copyright registrations.

           (G) (A) No third party (including any original equipment manufacturer
       or site license customer) has any right to manufacture, reproduce,
       distribute, sell, sublicense, market or exploit any of the products or
       services offered by TriZetto (the "TRIZETTO PRODUCTS") or any
       adaptations, translations, or derivative works based on the TriZetto
       Products, or any portion thereof; (B) neither TriZetto nor any TriZetto
       Subsidiary has granted to any third party any exclusive rights of any
       kind with respect to any of the TriZetto Products, including territorial
       exclusivity or exclusivity with respect to particular versions,
       implementations or translations of any of the TriZetto Products; and
       (C) neither TriZetto nor any TriZetto Subsidiary has granted any third
       party any right to market any product utilizing any TriZetto Product
       under any "private label" arrangements pursuant to which TriZetto or any
       TriZetto Subsidiary is not identified as the source of such goods. Each
       document or instrument identified pursuant to this Section is listed in
       Section 4.14 of the TriZetto Disclosure Letter and true and correct
       copies of such documents or instruments have been furnished to IMS. No
       third party has any right to manufacture, reproduce, distribute,
       sublicense, market or exploit any works or materials of which any of the
       TriZetto Products are a derivative work.

           (H) Except as is not reasonably likely to have a Material Adverse
       Effect on TriZetto, each of the TriZetto Products: (A) substantially
       complies with all specifications set forth therefor in any contract,
       agreement, advertisement or other promotional material for such products
       and with all other warranty requirements, other than bugs or fixes
       required or expected in the ordinary course of business and not otherwise
       material to TriZetto's business; and (B) can be recreated from its
       associated source code and related documentation by reasonably
       experienced technical personnel without undue burden.

           (I) To the knowledge of TriZetto, no employee of TriZetto or any
       TriZetto Subsidiary is in violation of any term of any employment
       contract, patent disclosure agreement or any other contract or agreement
       relating to the relationship of any such employee with TriZetto or any
       other party because of the nature of the business conducted by TriZetto
       or proposed to be conducted by TriZetto.

           (J) If TriZetto or any TriZetto Subsidiary is obligated to repair or
       replace products or services previously provided by TriZetto or any
       TriZetto Subsidiary that are not Year 2000 Compliant in order to meet
       TriZetto's or any TriZetto Subsidiary's contractual obligations, to avoid
       personal injury or other liability, to avoid misrepresentation claims, or
       to satisfy any other obligations or requirements, to the knowledge of
       TriZetto, TriZetto and the TriZetto Subsidiaries have repaired or
       replaced those products and services to make them Year 2000 Compliant in
       all material respects.

           (K) All of the Software owned or used by TriZetto complies in all
       material respects with the currently known and relevant provisions of the
       Health Insurance Portability and Accountability Act of 1996, as amended.

        4.15  FEES AND EXPENSES.  Neither TriZetto nor any of the TriZetto
    Subsidiaries has paid or become obligated to pay any fee or commission to
    any broker, finder or intermediary in connection with the transactions
    contemplated by this Agreement.

                                      A-26
<PAGE>
        4.16  ENVIRONMENTAL MATTERS.

           (A) TriZetto and each TriZetto Subsidiary, including all of their
       businesses and operations, are, and have been, operated in compliance
       with all Environmental Laws, except where the failure to so comply has
       not had, and is not reasonably likely to have, a Material Adverse Effect
       on TriZetto.

           (B) To the knowledge of TriZetto, there are no conditions on, about,
       beneath or arising from any real property which is now owned, used or
       leased to or by TriZetto or any TriZetto Subsidiary ("TRIZETTO CURRENT
       REAL PROPERTY") which might, under any Environmental Law, (i) give rise
       to any material cost, obligation, liability or the imposition of a
       statutory lien, or (ii) which would or may require any response, removal
       or remedial action or any other action, including without limitation
       reporting, investigation, monitoring, cleanup or contribution or which
       would require a material expenditure or commitment by TriZetto or any
       TriZetto Subsidiary.

           (C) To the knowledge of TriZetto, there were no conditions on, about,
       beneath or arising from any real property which was, but is no longer,
       owned, used or leased to or by TriZetto or any TriZetto Subsidiary
       ("TRIZETTO FORMER REAL PROPERTY"), during the period of such ownership,
       use or lease, which might, under any Environmental Law, (i) give rise to
       any material cost, obligation, liability or the imposition of a statutory
       lien, or (ii) which would or may require any response, removal or
       remedial action or any other action, including without limitation
       reporting, investigation, monitoring, cleanup or contribution or which
       would require a material expenditure or commitment by TriZetto or any
       TriZetto Subsidiary.

           (D) Neither TriZetto nor any TriZetto Subsidiary has received any
       notification of a release or threat of a release of a Hazardous Substance
       with respect to any TriZetto Current Real Property or TriZetto Former
       Real Property.

           (E) No Hazardous Substances have been used, handled, generated,
       processed, treated, stored, transported to or from, released, discharged
       or disposed of by TriZetto, any TriZetto Subsidiary or, to TriZetto's
       knowledge, any third party on, about or beneath any TriZetto Current Real
       Property in a manner which could reasonably be expected to result in any
       material liability under any Environmental Law.

           (F) During TriZetto's or any TriZetto Subsidiary's ownership, use or
       lease of the TriZetto Former Real Property, no Hazardous Substances were
       used, handled, generated, processed, treated, stored, transported to or
       from, released, discharged or disposed of by TriZetto, any TriZetto
       Subsidiary or, to TriZetto's knowledge, any third party on, about or
       beneath the TriZetto Former Real Property in a manner which could
       reasonably be expected to result in any material liability under any
       Environmental Law.

           (G) To the knowledge of TriZetto, there are no above or underground
       storage tanks, asbestos containing materials, or transformers containing
       or contaminated with PCB's on, about or beneath the TriZetto Current Real
       Property. During TriZetto's or any TriZetto Subsidiary's ownership, use
       or lease of the TriZetto Former Real Property, there were no above or
       underground storage tanks, asbestos containing materials, or transformers
       containing or contaminated with PCB's on, about or beneath the TriZetto
       Former Real Property.

           (H) Except as is not reasonably likely to have a Material Adverse
       Effect on TriZetto, neither TriZetto nor any TriZetto Subsidiary has
       received notice or has knowledge of:

               (I) any claim, demand, investigation, enforcement action,
           response, removal, remedial action, statutory lien or other
           governmental or regulatory action instituted or threatened against
           TriZetto or any TriZetto Subsidiary or the TriZetto Current Real
           Property or TriZetto Former Real Property pursuant to any
           Environmental Law;

                                      A-27
<PAGE>
               (II) any claim, demand notice, suit or action, made or threatened
           by any Person against TriZetto, any TriZetto Subsidiary, the TriZetto
           Current Real Property or the TriZetto Former Real Property relating
           to (A) any form of damage, loss or injury resulting from or claimed
           to result from, any Hazardous Substance on, about, beneath or arising
           from the TriZetto Current Real Property or TriZetto Former Real
           Property or (B) any alleged violation of any Environmental Law by
           TriZetto or any TriZetto Subsidiary; or

              (III) any communication to or from any governmental authority
           arising out of or in connection with Hazardous Substances on, about,
           beneath, arising from or generated at the TriZetto Current Real
           Property or TriZetto Former Real Property, including without
           limitation, any notice of violation, citation, complaint, order,
           directive, request for information or response thereto, notice
           letter, demand letter or compliance schedule.

           (I) No wastes generated by TriZetto or any TriZetto Subsidiary have
       ever been directly or indirectly sent, transferred, transported to,
       treated, stored or disposed of at any site listed or formally proposed
       for listing on the National Priority List promulgated pursuant to CERCLA
       or to any site listed on any state list of sites requiring or recommended
       for investigation or clean-up. None of the TriZetto Current Real Property
       or TriZetto Former Real Property is listed on the National Priorities
       List or any state list of sites requiring or recommended for
       investigation or clean up.

           (J) all environmental reports, studies, assessments, sampling data,
       permits, filings, regulatory correspondence, claims and other
       environmental information relating to TriZetto or any TriZetto Subsidiary
       or any of their current or former properties or operations have been
       provided to IMS.

        4.17  INTERESTED PARTY TRANSACTIONS.  Except as disclosed in the
    TriZetto SEC Documents filed prior to the date of this Agreement, no officer
    or director of TriZetto or any "affiliate" or "associate" (as those terms
    are defined in Rule 405 promulgated under the Securities Act) of any such
    person has had, either directly or indirectly, a material interest in:
    (i) any Person which purchases from or sells, licenses or furnishes to
    TriZetto or any of the TriZetto Subsidiaries any material amount of goods,
    property, technology or intellectual or other property rights or services;
    or (ii) any material contract or agreement to which TriZetto or any of the
    TriZetto Subsidiaries is a party or by which it may be bound or affected.

        4.18  BOARD APPROVAL.  The Board of Directors of Merger Sub has, as of
    the date hereof, unanimously (i) approved this Agreement and the Merger,
    (ii) determined that the Merger is in the best interests of its stockholders
    and (iii) submitted this Agreement to TriZetto, as its sole stockholder, for
    adoption and approval. The Board of Directors of TriZetto has, as of the
    date hereof, unanimously (i) approved this Agreement and the transactions
    contemplated hereby, including the issuance of TriZetto Common Stock to IMS
    in connection with the Merger, (ii) determined that this Agreement and the
    transactions contemplated hereby are in the best interests of the
    stockholders of TriZetto and (iii) approved a recommendation that the
    stockholders of TriZetto approve the issuance of TriZetto Common Stock to
    IMS in connection with the Merger as contemplated hereby.

        4.19  VOTE REQUIRED.  The affirmative vote of a majority of the shares
    of TriZetto Common Stock present in person or represented by proxy at the
    TriZetto Stockholders Meeting is the only vote of the holders of any class
    or series of TriZetto capital stock necessary to approve this Agreement and
    the transactions contemplated hereby, including the issuance of TriZetto
    Common Stock to IMS in connection with the Merger as contemplated hereby.
    The shares of TriZetto Common Stock that the Designated Stockholders have
    agreed to vote in favor of the transactions contemplated hereby pursuant to
    the Voting Agreements represents more than 50% of the issued

                                      A-28
<PAGE>
    and outstanding TriZetto Common Stock as of the date hereof. The approval of
    TriZetto is the only vote or approval of the holders of any class or series
    of capital stock of Merger Sub necessary to approve this Agreement and the
    Merger. TriZetto, as the sole stockholder of Merger Sub, has approved this
    Agreement and the Merger.

        4.20  OPINION OF FINANCIAL ADVISOR.  TriZetto's Board of Directors has
    received an opinion, dated the date of this Agreement, from UBS Warburg LLC
    to the effect that, as of such date, the Merger Consideration is fair to
    TriZetto from a financial point of view.

        4.21  RESTRICTIONS ON BUSINESS ACTIVITIES.  There is no material
    agreement, judgment, injunction, order or decree binding upon TriZetto or
    any of the TriZetto Subsidiaries that has or could reasonably be expected to
    have the effect of prohibiting or materially impairing the conduct of
    business by TriZetto or any of Subsidiaries as currently conducted or any
    acquisition of property by TriZetto or any of Subsidiaries.

        4.22  TAKEOVER STATUTES.  No Takeover Statute or any anti-takeover
    provision in the certificate of incorporation or bylaws of TriZetto or
    Merger Sub is applicable to TriZetto, the TriZetto Common Stock, the Merger
    or the other transactions contemplated by this Agreement or the Voting
    Agreements.

        4.23  MERGER SUB.  The authorized capital stock of Merger Sub consists
    of 1,000 shares of Common Stock, par value $0.001 per share, all of which
    have been duly authorized and are validly issued and outstanding, fully paid
    and nonassessable. All of the issued and outstanding capital stock of Merger
    Sub is, and at the Effective Time will be, owned by TriZetto, and there are
    (i) no other authorized, issued or outstanding shares of capital stock or
    other equity securities of Merger Sub, (ii) no securities of Merger Sub
    convertible into or exchangeable or exercisable for shares of capital stock
    or other equity securities of Merger Sub and (iii) no options or other
    rights to acquire from Merger Sub, and no obligations of Merger Sub to
    issue, any capital stock or other equity securities or securities
    convertible into or exchangeable or exercisable for capital stock or other
    equity securities of Merger Sub. Merger Sub has not conducted any business
    prior to the date hereof and has no, and prior to the Effective Time will
    have no, assets, liabilities or obligations of any nature other than those
    incident to its formation and pursuant to this Agreement and the Merger and
    the other transactions contemplated by this Agreement.

    5.  IMS COVENANTS.

        5.1  ADVICE OF CHANGES.  During the period from the date of this
    Agreement until the earlier of the Effective Time or the termination of this
    Agreement in accordance with its terms, IMS will promptly advise TriZetto in
    writing (a) of any event occurring subsequent to the date of this Agreement
    that would render any representation or warranty of IMS or Erisco contained
    in this Agreement, if made on or as of the date of such event or the Closing
    Date, untrue or inaccurate in any material respect, (b) of any Material
    Adverse Effect on Erisco and (c) of any breach by IMS or Erisco of any
    covenant or agreement contained in this Agreement.

        5.2  MAINTENANCE OF BUSINESS.  During the period from the date of this
    Agreement until the earlier of the Effective Time or the termination of this
    Agreement in accordance with its terms, Erisco shall, and IMS will use its
    reasonable best efforts to cause Erisco to, carry on and to preserve its
    business and its relationships with customers, suppliers, employees and
    others in substantially the same manner as it has prior to the date hereof.
    If IMS or Erisco becomes aware of any material deterioration in Erisco's
    relationship with any material customer, material supplier or key employee,
    it will promptly bring such information to the attention of TriZetto in
    writing and, if requested by TriZetto, will exert its reasonable best
    efforts to restore the relationship.

                                      A-29
<PAGE>
        5.3  CONDUCT OF BUSINESS.  During the period from the date of this
    Agreement until the earlier of the Effective Time or the termination of this
    Agreement in accordance with its terms, Erisco shall, and IMS will cause
    Erisco to, continue to conduct its business and maintain its business
    relationships in the ordinary and usual course and to not, without the prior
    written consent of TriZetto, unless expressly contemplated by this
    Agreement:

           (A) borrow any money except for amounts that are not in the aggregate
       material to the financial condition of Erisco and except for intercompany
       borrowings;

           (B) enter into any material transaction not in the ordinary course of
       its business consistent with past practice;

           (C) materially encumber or permit to be materially encumbered any of
       its assets except in the ordinary course of its business;

           (D) make a material disposition of assets except in the ordinary
       course of business consistent with past practice;

           (E) enter into any material lease or contract for the purchase or
       sale or license of any property, real or personal, except in the ordinary
       course of business consistent with past practice;

           (F) fail to maintain its equipment and other assets in good working
       condition and repair according in all material respects to the standards
       it has maintained to the date of this Agreement, subject only to ordinary
       wear and tear;

           (G) pay (or make any oral or written commitments or representations
       to pay) any bonus, increased salary or special remuneration to any
       officer, employee or consultant (except for normal salary increases
       consistent with past practices not to exceed ten percent (10%) per year
       pursuant to existing arrangements previously disclosed to TriZetto) or
       enter into or vary the terms of any employment, consulting or severance
       agreement with any such person, pay any severance or termination pay
       (other than payments made in accordance with plans or agreements existing
       on the date hereof), grant any stock option (except for normal grants to
       newly hired or current employees consistent with past practices) or issue
       any restricted stock, or enter into or modify any agreement or plan or
       increase benefits to Erisco employees under any of IMS's employee benefit
       plans, other than such incentive awards, bonus payments and retention
       programs as may be reasonably necessary in order for Erisco to conduct
       its business and administer corporate affairs in the ordinary course
       consistent with past practice;

           (H) make any material change in accounting practices, except for any
       such change required by reason of a concurrent change in GAAP;

           (I) issue, pledge or sell, dispose of or encumber any shares of its
       capital stock of any class, or any other of its securities, or issue or
       create any warrants, obligations, subscriptions, options, convertible
       securities or other commitments to issue shares of capital stock;

           (J) merge, consolidate or reorganize with, or acquire any entity in
       one or more transactions (other than such transaction that would not be
       material and that would not impair or affect the timing of the Merger);

           (K) amend its Certificate of Incorporation or Bylaws;

           (L) license any Erisco IP Rights except in the ordinary course of
       business consistent with past practice;

           (M) knowingly take any actions that would make any representation or
       warranty of Erisco or IMS hereunder inaccurate in any material respect;
       or

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<PAGE>
           (N) agree to do, or enter into negotiations with respect to, any of
       the things described in the preceding clauses in this Section 5.3.

        5.4  PROXY STATEMENT.  IMS and Erisco will promptly provide all
    information relating to its business or operations and the business or
    operations of Erisco necessary for inclusion in the Proxy Statement to
    satisfy all requirements of applicable state and federal securities laws.
    IMS and Erisco shall be solely responsible for any statement, information or
    omission in the Proxy Statement relating to it or its affiliates based upon
    written information furnished by it. IMS will not provide or publish to its
    stockholders any material concerning it or its affiliates that violates the
    Exchange Act with respect to the transactions contemplated hereby.

        5.5  REGULATORY APPROVALS.  IMS and Erisco will promptly execute and
    file, or join in the execution and filing, of any application or other
    document that may be necessary in order to obtain the authorization,
    approval or consent of any governmental body, federal, state, local or
    foreign, which may be reasonably required, or which TriZetto may reasonably
    request, in connection with the consummation of the transactions
    contemplated by this Agreement. Without limiting the generality of the
    foregoing, as promptly as practicable after the execution of this Agreement,
    IMS shall file with the Federal Trade Commission (the "FTC") and the
    Antitrust Division of the Department of Justice (the "DOJ"), a pre-merger
    notification report under the HSR Act. Subject to the proviso contained in
    Section 5.6, IMS will use its reasonable best efforts to promptly obtain all
    such authorizations, approvals and consents.

        5.6  NECESSARY CONSENTS.  During the term of this Agreement, each of IMS
    and Erisco will use its reasonable best efforts to obtain such written
    consents and take such other actions as may be necessary or appropriate in
    addition to those set forth in Section 5.5 to allow the consummation of the
    transactions contemplated hereby; PROVIDED, HOWEVER, that nothing in this
    Section 5.6 shall require, or be construed to require, IMS or Erisco to
    proffer to, or agree to, sell or hold separate and agree to sell, before or
    after the Effective Time, any assets, businesses, or interest in any assets
    or businesses of IMS or Erisco or any of its affiliates (or to consent to
    any sale, or agreement to sell, by TriZetto of any of its assets or
    businesses) or to agree to any material changes or restriction in the
    operations of any such assets or businesses.

        5.7  ACCESS TO INFORMATION.  IMS and Erisco will allow TriZetto and its
    agents reasonable access to the files, books, records and offices of Erisco,
    including, without limitation, any and all information relating to Erisco's
    taxes, commitments, contracts, leases, licenses and real, personal and
    intangible property and financial condition. IMS will cause its accountants
    to cooperate with TriZetto and its agents in making available to TriZetto
    all financial information with respect to Erisco reasonably requested,
    including, without limitation, the right to examine all working papers
    pertaining to all tax returns of Erisco and financial statements of Erisco
    prepared or audited by such accountants. All such information shall be
    governed by the terms of the confidentiality agreement between IMS and
    TriZetto (the "CONFIDENTIALITY AGREEMENT").

        5.8  SATISFACTION OF CONDITIONS PRECEDENT.  During the term of this
    Agreement, each of Erisco and IMS will use its reasonable best efforts to
    satisfy or cause to be satisfied all the conditions precedent that are set
    forth in Section 11, and will use its reasonable best efforts to cause the
    Merger and the other transactions contemplated by this Agreement to be
    consummated.

        5.9  AUDITED FINANCIAL STATEMENTS.  Within 30 days following the date of
    this Agreement, Erisco shall, and IMS shall cause Erisco to, deliver to
    TriZetto audited financial statements for the three year period ended
    December 31, 1999, which audited financial statements shall be prepared in
    conformity with Regulation S-X of the Exchange Act.

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        5.10  NO SOLICITATION.

           (A) From and after the date of this Agreement until the Effective
       Time or termination of this Agreement pursuant to Section 12, IMS and
       Erisco will not, nor will they authorize or permit any affiliate or
       representative retained by them to, directly or indirectly, (i) solicit,
       initiate, encourage or induce the making, submission or announcement of
       any Acquisition Proposal; (ii) participate in any discussions or
       negotiations regarding, or furnish to any person any non-public
       information with respect to, or take any other action to facilitate any
       inquiries or the making of any proposal that constitutes or may
       reasonably be expected to lead to, any Acquisition Proposal;
       (iii) engage in discussions with any person with respect to any
       Acquisition Proposal, except as to the existence of this Section 5.10;
       (iv) approve, endorse or recommend any Acquisition Proposal; or
       (v) enter into any letter of intent or similar document or any contract
       contemplating or otherwise relating to any Acquisition Transaction. IMS
       and Erisco will immediately cease any and all existing activities,
       discussions or negotiations with any parties conducted heretofore with
       respect to any Acquisition Proposal. Without limiting the foregoing, it
       is understood that any violation of the restrictions set forth in the
       preceding two sentences by any officer, director or employee of IMS,
       Erisco or any of their subsidiaries or any investment banker, attorney or
       other advisor or representative of IMS or Erisco or any of their
       subsidiaries shall be deemed to be a breach of this Section 5.10 by IMS
       and Erisco.

        "ACQUISITION PROPOSAL" shall mean any proposal (other than an offer or
    proposal by TriZetto) relating to any Acquisition Transaction. "ACQUISITION
    TRANSACTION" shall mean any transaction or series of related transactions
    involving: (A) any merger, consolidation, business combination or similar
    transaction with or into, or stock sale or similar transaction by, Erisco;
    (B) any sale, lease (other than in the ordinary course of business),
    acquisition or disposition of more than 5% of the assets of Erisco; or
    (C) any liquidation or dissolution of Erisco.

        In addition to the obligations of IMS and Erisco set forth in
    Section 5.10(a) hereof, IMS and Erisco shall immediately advise TriZetto
    orally and in writing of any request for non-public information or any
    inquiry with respect to Erisco which either of them reasonably believes may
    pertain to an Acquisition Proposal or to any Acquisition Transaction, the
    material terms and conditions of such request, Acquisition Proposal or
    inquiry, and the identity of the Person or group making any such request,
    Acquisition Proposal or inquiry. IMS and Erisco will keep TriZetto
    immediately informed of the status and details (including material
    amendments or proposed material amendments) of any such request, Acquisition
    Proposal or inquiry.

        5.11  IHPI.  Prior to the Effective Time, IMS will cause Erisco to
    distribute all of the shares of IHPI to IMS. Such distribution will not have
    a Material Adverse Effect on Erisco.

    6.  TRIZETTO COVENANTS.

        6.1  ADVICE OF CHANGES.  During the period from the date of this
    Agreement until the earlier of the Effective Time or the termination of this
    Agreement in accordance with its terms, TriZetto will promptly advise IMS in
    writing (a) of any event occurring subsequent to the date of this Agreement
    that would render any representation or warranty of TriZetto contained in
    this Agreement, if made on or as of the date of such event or the Closing
    Date, untrue or inaccurate in any material respect, (b) of any Material
    Adverse Effect on TriZetto and (c) of any breach by TriZetto of any covenant
    or agreement contained in this Agreement.

        6.2  MAINTENANCE OF BUSINESS.  During the period from the date of this
    Agreement until the earlier of the Effective Time or the termination of this
    Agreement in accordance with its terms, TriZetto will use its reasonable
    best efforts to carry on and to preserve its business and its relationships
    with customers, suppliers, employees and others in substantially the same
    manner as

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<PAGE>
    it has prior to the date hereof. If TriZetto becomes aware of any material
    deterioration in the relationship with any material customer, material
    supplier or key employee, it will promptly bring such information to the
    attention of IMS in writing and, if requested by IMS, will exert its
    reasonable best efforts to restore the relationship.

        6.3  CONDUCT OF BUSINESS.  During the period from the date of this
    Agreement until the earlier of the Effective Time or the termination of this
    Agreement in accordance with its terms, TriZetto will continue to conduct
    its business and maintain its business relationships in the ordinary and
    usual course and, except as set forth on Schedule 6.3(a) hereto, will not,
    without the prior written consent of IMS, unless expressly contemplated by
    this Agreement, enter into, consummate, agree to or approve any Highly
    Material Transaction. As used herein, "HIGHLY MATERIAL TRANSACTION" shall
    mean (i) a sale or other disposition of 25% or more of the assets of
    TriZetto in a transaction or series of related transactions, (ii) a merger,
    consolidation or similar transaction in which TriZetto is not the surviving
    corporation, (iii) an issuance by TriZetto, or an acquisition by a third
    party or group, of equity interests in TriZetto that have the power to cast
    at least 25% of the votes entitled to be cast in elections of directors (or
    similar officials) of TriZetto in a transaction or series of related
    transactions, other than in connection with a public offering of securities
    for purposes of raising capital, or (iv) a strategic alliance, joint venture
    or other material transaction with any of the entities set forth on
    Schedule 6.3(b) or any of their respective successors or Affiliates (as
    defined under Rule 12b-2 under the Exchange Act).

        6.4  STOCKHOLDER MEETING.  TriZetto will convene a meeting (the
    "TRIZETTO STOCKHOLDERS MEETING") of holders of TriZetto Common Stock (the
    "TRIZETTO STOCKHOLDERS") to be held within forty-five (45) days after the
    Proxy Statement is mailed to the TriZetto Stockholders to submit the
    issuance of TriZetto Common Stock to IMS in connection with the Merger (the
    "TRIZETTO PROPOSAL") for the consideration and approval of the TriZetto
    Stockholders. Such approval shall be recommended by TriZetto's Board of
    Directors unless in the good faith judgment of TriZetto's Board of
    Directors, after consultation with outside counsel, taking such action would
    be inconsistent with its fiduciary obligations under applicable law. Such
    meeting will be convened, held and conducted, and any proxies will be
    solicited, in compliance with applicable securities laws. TriZetto agrees
    that its obligations to convene, hold and conduct the TriZetto Stockholders
    Meeting shall not be affected by the withdrawal or modification by the
    TriZetto's Board of Directors, in accordance with this Section 6.4, of its
    recommendation to the TriZetto Stockholders that such Stockholders approve
    the TriZetto Proposal.

        6.5  PROXY STATEMENT.  TriZetto will mail to its stockholders in a
    timely manner, for the purpose of considering and voting upon the TriZetto
    Proposal at the TriZetto Stockholders Meeting, the Proxy Statement. TriZetto
    will promptly provide all information relating to its business or operations
    necessary for inclusion in the Proxy Statement to satisfy all requirements
    of applicable state and federal securities laws. TriZetto shall be solely
    responsible for any statement, information or omission in the Proxy
    Statement relating to it or its affiliates based upon written information
    furnished by it. TriZetto will not provide or publish to its stockholders
    any material concerning it or its affiliates that violates the Exchange Act
    with respect to the transactions contemplated hereby.

        6.6  REGULATORY APPROVALS.  TriZetto will promptly execute and file, or
    join in the execution and filing, of any application or other document that
    may be necessary in order to obtain the authorization, approval or consent
    of any governmental body, federal, state, local or foreign which may be
    reasonably required, or which IMS may reasonably request, in connection with
    the consummation of the transactions contemplated by this Agreement. Without
    limiting the generality of the foregoing, as promptly as practicable after
    the execution of this Agreement, TriZetto shall file with the FTC and the
    DOJ a pre-merger notification report under the HSR Act. TriZetto will use
    its reasonable best efforts to promptly obtain all such authorizations,
    approvals and consents.

                                      A-33
<PAGE>
    In addition, TriZetto will proffer its willingness to abandon or restructure
    transactions other than the Merger entered into or announced by TriZetto or
    any of the TriZetto Subsidiaries on or after the date hereof, to sell or
    otherwise dispose of or hold separate and agree to sell or otherwise dispose
    of, or to change or restrict the operations of, such assets, categories of
    assets or businesses of TriZetto or the TriZetto Subsidiaries (and to enter
    into agreements with the relevant Governmental Entity giving effect
    thereto), no later than 90 days from the date hereof, if (i) such action
    should be reasonably necessary or advisable to avoid the commencement of a
    proceeding to delay, restrain, enjoin or otherwise prohibit consummation of
    the Merger by any Governmental Entity and (ii) the necessity or advisability
    of taking such action to avoid the commencement of a proceeding to delay,
    restrain, enjoin or otherwise prohibit consummation of the Merger by any
    Governmental Entity arose as a result of transactions entered into or
    announced by TriZetto or any TriZetto Subsidiary on or after the date
    hereof; PROVIDED, that the foregoing shall not require TriZetto to
    (i) sell, dispose of or hold separate, or agree to sell, dispose of or hold
    separate, any assets, categories of assets or businesses other than those
    acquired or to be acquired pursuant to transactions entered into or
    announced on or after the date hereof or (ii) abandon or restructure any
    transaction other than those entered into or announced on or after the date
    hereof.

        6.7  NECESSARY CONSENTS.  During the term of this Agreement, TriZetto
    will use its reasonable best efforts to obtain such written consents and
    take such other actions as may be necessary or appropriate in addition to
    those set forth in Section 6.6 to allow the consummation of the transactions
    contemplated hereby.

        6.8  ACCESS TO INFORMATION.  TriZetto will allow IMS and its agents
    reasonable access to the files, books, records and offices of TriZetto and
    each TriZetto Subsidiary, including, without limitation, any and all
    information relating to TriZetto's taxes, commitments, contracts, leases,
    licenses and real, personal and intangible property and financial condition.
    TriZetto will cause its accountants to cooperate with IMS and its agents in
    making available to IMS all financial information reasonably requested,
    including, without limitation, the right to examine all working papers
    pertaining to all tax returns and financial statements prepared or audited
    by such accountants. All such information shall be governed by the terms of
    the Confidentiality Agreement.

        6.9  SATISFACTION OF CONDITIONS PRECEDENT.  During the term of this
    Agreement, TriZetto will use its reasonable best efforts to satisfy or to
    cause to be satisfied all the conditions precedent that are set forth in
    Section 10, and TriZetto will use its reasonable best efforts to cause the
    Merger and the other transactions contemplated by this Agreement to be
    consummated.

        6.10  LISTING.  TriZetto will use its best efforts to cause the shares
    of TriZetto Common Stock to be issued to IMS pursuant to the Merger to be
    approved for quotation on the Nasdaq, subject to official notice of
    issuance, prior to the Closing Date.

        6.11  APPOINTMENT OF DIRECTOR.  The Board of Directors of TriZetto shall
    take any and all such actions as may be necessary to cause the Chief
    Executive Officer of IMS (or such other individual as may be designated by
    IMS and reasonably acceptable to TriZetto) to be appointed to the Board of
    Directors of TriZetto as of the Effective Time as a Class II director.

        6.12  TRIZETTO OPTIONS.  Prior to the TriZetto Stockholders Meeting, the
    Board of Directors of TriZetto (or the committee thereof appointed to
    administer the TriZetto Plan) shall take all such actions (if any) as are
    necessary in order to ensure that the vesting of all TriZetto Options will
    not accelerate as a result of the Merger or the related transactions
    contemplated hereby.

        6.13  EMPLOYEES AND EMPLOYEE BENEFITS.

           (A) TriZetto shall be responsible for (i) payment of long and
       short-term disability claims that arise from disabilities of Erisco
       employees that occur on or after the Effective Time, and

                                      A-34
<PAGE>
       (ii) providing COBRA coverage for Erisco employees who elect such
       coverage after the Effective Time (including Erisco employees who were
       eligible for COBRA coverage prior to the Effective Time but who elect
       such coverage after the Effective Time). For purposes of this paragraph,
       a claim shall be deemed to have been incurred when the medical or other
       service giving rise to the claim is performed, except that disability
       claims shall be deemed to have been incurred on the date the Employee
       becomes disabled.

        Attached hereto as Schedule 6.13(b) is a list of employee benefit plans
    currently available to TriZetto and Erisco employees. TriZetto and Erisco
    shall use their respective reasonable best efforts to achieve the
    resolutions set forth on Schedule 6.13(b). Each of the parties acknowledges
    that Schedule 6.13(b) is subject to continued review and may be amended from
    time to time after the date hereof, PROVIDED that no amendment may be made
    without the prior written consent of TriZetto and Erisco, which consent may
    not be unreasonably withheld. Irrespective of the extent to which the stated
    resolutions on Schedule 6.13(b) are achieved, TriZetto will use its
    reasonable best efforts to ensure that benefits received by Erisco employees
    under TriZetto's employee benefit plans are not, in the aggregate and taking
    into account any of the resolutions on Schedule 6.13(b) which are achieved,
    materially less than what an Erisco employee would have received under the
    employee benefit plans in which such employee was entitled to participate
    prior to the Closing Date. For purposes of this Section 6.13(b), benefits
    will be considered materially less if the value of the benefits are
    decreased by an amount greater than 2% of the average base annual salary of
    Erisco employees as of the date hereof. Except as expressly set forth in
    Section 7.9, TriZetto shall bear, and shall indemnify and hold IMS harmless
    from, all costs and expenses incurred in connection with providing benefits
    to Erisco's employees from and after the Closing, whether such benefits are
    provided in accordance with Schedule 6.13(b) or otherwise. The parties will
    use their best efforts to complete the resolutions by January 1, 2001.
    Effective January 1, 2001, TriZetto shall make a one-time salary adjustment
    to those employees who have been adversely affected in excess of the amounts
    set forth above. Thereafter, the Erisco employees will participate in
    TriZetto's employee benefit plans in accordance with employees in similar
    positions.

        6.14  RIGHTS AGREEMENT.  Prior to the Closing, TriZetto shall adopt a
    Stockholder Protection Rights Agreement (the "TRIZETTO RIGHTS AGREEMENT"),
    in a form reasonably acceptable to IMS, which shall, among other things,
    provide for a 15% "flip-in" triggering level; a "flip-over" trigger; an
    exchange option and an exception to the definition of "Acquiring Person" to
    exclude therefrom IMS, its affiliates and any transferees of the TriZetto
    Common Stock issued to IMS in connection with the Merger (other than those
    entities set forth on Schedule 6.14 hereto and their respective successors
    and Affiliates) (collectively, the "GRANDFATHERED ENTITIES"). In addition,
    from and after the date hereof, TriZetto shall not (i) amend or supplement
    the TriZetto Rights Agreement in any manner which would adversely affect the
    rights of the Grandfathered Entities thereunder or (ii) adopt or implement
    any other stockholder protection rights agreement or any similar plan or
    arrangement unless such agreement, plan or arrangement is in no way less
    favorable to the Grandfathered Entities than the TriZetto Rights Agreement.

    7.  ADDITIONAL AGREEMENTS.

        7.1  PROXY STATEMENT.  As promptly as practicable after the date of this
    Agreement, TriZetto shall prepare and file with the SEC a proxy statement
    with respect to the submission to the TriZetto Stockholders of the issuance
    of TriZetto Common Stock to IMS in connection with the Merger and any
    related matters (the "PROXY STATEMENT") and any other documents required by
    the Exchange Act in connection with the Merger. TriZetto shall use its
    reasonable best efforts to respond promptly to any comments of the SEC and
    to cause the Proxy Statement to be mailed to the TriZetto Stockholders at
    the earliest practicable time. Each party shall promptly furnish to the
    other party all information concerning such party and, in the case of
    TriZetto, its stockholders as may be reasonably required in connection with
    any action contemplated by this Section 7.1. The

                                      A-35
<PAGE>
    Proxy Statement shall comply in all material respects with all applicable
    requirements of law. TriZetto will notify IMS promptly of the receipt of any
    comments from the SEC or its staff and of any request by the SEC or its
    staff for amendments or supplements to the Proxy Statement or for additional
    information and will supply the other with copies of all correspondence with
    the SEC or its staff with respect to the Proxy Statement. Whenever any event
    occurs which should be set forth in an amendment or supplement to the Proxy
    Statement, TriZetto or IMS, as the case may be, shall promptly inform the
    other of such occurrence and cooperate in filing with the SEC or its staff,
    and/or mailing to stockholders of TriZetto, such amendment or supplement.

        7.2  TAKEOVER STATUTE.  If any Takeover Statute is or may become
    applicable to the Merger or the other transactions contemplated by this
    Agreement or the Voting Agreements, TriZetto and its Board of Directors
    shall grant such approvals and take such actions as are necessary so that
    such transactions may be consummated as promptly as practicable on the terms
    contemplated by this Agreement or by the Voting Agreements, as the case may
    be, or by the Merger and otherwise act to eliminate or minimize the effects
    of such statute or regulation on such transactions.

        7.3  REGISTRATION RIGHTS AGREEMENT.  Prior to or concurrently with the
    Closing, IMS and TriZetto shall enter into a registration rights agreement
    in the form of EXHIBIT D hereto (the "REGISTRATION RIGHTS AGREEMENT").

        7.4  STOCKHOLDER AGREEMENT.  Prior to or concurrently with the Closing,
    IMS and TriZetto shall enter into a stockholder agreement in the form of
    EXHIBIT E hereto (the "STOCKHOLDER AGREEMENT").

        7.5  TRANSITIONAL SERVICES AGREEMENTS.  Prior to or concurrently with
    the Closing, IMS, Erisco and TriZetto shall enter into one or more
    agreements (the "TRANSITIONAL SERVICES AGREEMENTS"), in form and substance
    reasonably satisfactory to TriZetto and IMS, pursuant to which IMS will
    continue to provide certain services (e.g. payroll processing) to Erisco for
    a transitional period of time after the Effective Time at a price based on
    the fair market value of such services.

        7.6  DATA RIGHTS AGREEMENT.  Prior to or concurrently with the Closing,
    IMS and TriZetto shall enter into a data rights agreement (the "DATA RIGHTS
    AGREEMENT") pursuant to which TriZetto will grant IMS (i) an exclusive
    (other than for TriZetto's internal use or, with respect to data which
    TriZetto does not own, at the specific request of the owner of such data),
    worldwide, royalty-free (other than reimbursement of reasonable costs of
    data transmission and payment of a mutually agreed upon profit margin),
    perpetual license to all data rights currently held or acquired in the
    future by TriZetto and its subsidiaries that arise from or relate to the
    Erisco business, and (ii) a worldwide license to all other data rights
    currently held or acquired in the future by TriZetto and its subsidiaries,
    on terms and conditions (including reimbursement of reasonable costs of data
    transmission and payment of a mutually agreed upon profit margin) as shall
    be reasonably agreed upon by the parties, which terms and conditions shall
    be at least as favorable to IMS in every material respect as other data
    rights or similar agreements entered into between TriZetto and third
    parties. IMS acknowledges that TriZetto and Erisco currently hold no rights
    to commercialize data, and that the granting of any license to IMS shall be
    subject to any required consents from TriZetto's and Erisco's customers.

        7.7  HEALTHWEB LICENSE AGREEMENT.  Prior to or concurrently with the
    Closing, IMS and TriZetto shall enter into a license agreement (the
    "HEALTHWEB LICENSE AGREEMENT") on the terms and conditions set forth on
    Schedule 7.7 hereto.

        7.8  WORKING CAPITAL.

           (A) IMS covenants and agrees that, immediately prior to Closing, it
       will (i) repay, in cash by wire transfer of immediately available funds,
       the amount then owed by IMS to Erisco in

                                      A-36
<PAGE>
       full and (ii) if that amount falls short of $32,000,000 (the approximate
       amount owed by IMS to Erisco as of March 31, 2000), contribute to Erisco,
       in cash by wire transfer of immediately available funds, an amount equal
       to the shortfall.

           (B) Within 45 days following the Closing, IMS shall, at its expense,
       prepare, or cause to be prepared, and deliver to TriZetto an unaudited
       balance sheet (the "CLOSING WORKING CAPITAL AMOUNT STATEMENT") which
       shall set forth the Closing Working Capital Amount and which shall be
       prepared in a manner consistent with the balance sheet included in the
       Interim Financial Statements. For purposes of this Section 7.8, "CLOSING
       WORKING CAPITAL AMOUNT" means the accounts receivable of Erisco as of the
       Closing Date plus the prepaid expenses of Erisco as of the Closing Date,
       minus the sum of (i) the accounts payable of Erisco as of the Closing
       Date and (ii) the accrued liabilities (excluding any Taxes for which IMS
       is liable pursuant to Section 8 of this Agreement) of Erisco as of the
       Closing Date.

           (C) TriZetto and TriZetto's accountants shall complete their review
       of the Closing Working Capital Amount Statement within 10 days after the
       delivery by IMS thereof. In the event that TriZetto determines that the
       Closing Working Capital Amount has not been calculated in accordance with
       the definition thereof set forth in Section 7.8(b), TriZetto shall inform
       IMS in writing of such determination (the "TRIZETTO OBJECTION"), setting
       forth a specific description of the basis of the TriZetto Objection and
       the adjustments which TriZetto believes should be made, on or before the
       last day of such 10 day period. IMS shall then have 10 days to review and
       respond to the TriZetto Objection. If IMS and TriZetto are unable to
       resolve all of their disagreements with respect to the determination of
       the foregoing items within 30 days following IMS's response to the
       TriZetto Objection, they shall refer their remaining differences to
       PricewaterhouseCoopers LLC or another internationally recognized firm of
       independent public accountants as to which IMS and TriZetto mutually
       agree (the "INDEPENDENT PUBLIC ACCOUNTANTS"), who shall, acting as
       experts and not as arbitrators, determine on the basis of the definition
       of Closing Working Capital Amount, and only with respect to the remaining
       differences so submitted, whether and to what extent, if any, the Closing
       Working Capital Amount, as derived from the Closing Working Capital
       Amount Statement, requires adjustments. The Independent Public
       Accountants' determination shall be conclusive and binding upon TriZetto
       and IMS. The fees and disbursements of the Independent Public Accountants
       shall be shared equally by TriZetto and IMS. TriZetto and IMS shall make
       readily available to the Independent Public Accountants all relevant
       books and records and any work papers (including those of the parties'
       respective accountants) relating to the Closing Working Capital Amount
       Statement and all other items reasonably requested by the Independent
       Public Accountants. The "ADJUSTED CLOSING WORKING CAPITAL AMOUNT
       STATEMENT" shall be (i) the Closing Working Capital Amount Statement in
       the event that (x) no TriZetto Objection is delivered to IMS during the
       10-day period specified above, or (y) IMS and TriZetto so agree,
       (ii) the Closing Working Capital Amount Statement, adjusted in accordance
       with the TriZetto Objection in the event that (x) IMS does not respond to
       the TriZetto Objection within the 10-day period following receipt by IMS
       of the TriZetto Objection, or (y) IMS and TriZetto so agree, or
       (iii) the Closing Working Capital Amount Statement, as adjusted by either
       (x) the agreement of IMS and TriZetto or (y) the Independent Public
       Accountants.

           (D) TriZetto shall provide IMS and its accountants full access to its
       books and records, any other information, including work papers of its
       accountants, and to any of its employees to the extent reasonably
       necessary for IMS to prepare the Closing Working Capital Amount
       Statement.

           (E) Within 10 days following issuance of the Adjusted Closing Working
       Capital Amount Statement, the adjustment payments payable pursuant to
       this Section 7.8(e) shall be paid by

                                      A-37
<PAGE>
       wire transfer of immediately available funds to the bank account
       designated by TriZetto or IMS, as the case may be. If but only if the
       Closing Working Capital Amount derived from the Adjusted Closing Working
       Capital Amount Statement falls short of zero by more than $2,000,000, IMS
       shall pay TriZetto an amount equal to the absolute value of such Closing
       Working Capital Amount minus $2,000,000. Similarly, if but only if the
       Closing Working Capital Amount derived from the Adjusted Closing Working
       Capital Amount Statement is more than $2,000,000, TriZetto shall pay IMS
       an amount equal to such Closing Working Capital Amount minus $2,000,000.
       Any such payment by IMS or TriZetto shall be accompanied by interest
       thereon from the Closing Date through the date of payment at the rate of
       interest publicly announced by Citibank, N.A. or any successor thereto in
       New York, New York from time to time as its "base rate" plus two (2) per
       cent.

        7.9  EMPLOYEES AND EMPLOYEE BENEFITS.

           (A) As of the Effective Time, the Erisco employees shall cease to be
       covered by IMS's employee welfare benefit plans, including plans,
       programs, policies and arrangements which provide medical and dental
       coverage, life and accident insurance, disability coverage, and vacation
       and severance pay (collectively, "WELFARE PLANS"), and shall cease to
       participate in all "employee pension benefit plans" (within the meaning
       of Section 3(2) of ERISA) and all other employee benefit plans maintained
       by IMS. Except as otherwise provided herein, IMS shall (i) retain
       responsibility for all Welfare Plan claims incurred by Erisco employees
       prior to the Effective Time, (ii) retain any obligation for payment of
       short-term and long-term disability claims arising from disabilities of
       Erisco employees that occurred prior to the Effective Time, and
       (iii) provide COBRA coverage for Erisco employees who elected such
       coverage prior to the Effective Time. For purposes of this paragraph, a
       claim shall be deemed to have been incurred when the medical or other
       service giving rise to the claim is performed, except that disability
       claims shall be deemed to have been incurred on the date the Erisco
       employee becomes disabled.

           (B) As of the Effective Time, Erisco shall cease to be a
       participating employer in all IMS employee benefit plans.

        7.10  JOINTLY DEVELOPED PRODUCTS.  From and after the Effective Time,
    IMS and TriZetto shall discuss the appropriate treatment of jointly
    developed products and any data rights arising therefrom; PROVIDED, that the
    foregoing shall not (i) impose on either IMS or TriZetto any obligation to
    enter into any agreement with respect to any such jointly developed products
    or (ii) in any way reduce or limit the rights granted to IMS pursuant to the
    Data Rights Agreement.

        7.11  USE OF NAME AND LOGO.  It is expressly agreed that neither
    TriZetto nor Merger Sub is purchasing or acquiring or after the Closing
    shall have any right, title or interest in the names of IMS or its
    affiliates (other than Erisco) or any trade names, trademarks, identifying
    logos or service marks employing the words "IMS" or any part or variation
    thereof. As promptly as practicable, but in no event alter than 90 days
    following the Closing Date, TriZetto shall cause the Surviving Corporation
    to remove, strike over or otherwise obliterate all of IMS's trademarks and
    logos from all materials constituting their properties and assets,
    including, without limitation, any business cards, schedules, stationery,
    displays, signs, promotional materials, manuals, forms and other materials,
    if such materials are distributed or made available or proposed to be
    distributed or made available to third parties; PROVIDED that (i) the
    Surviving Corporation shall cease using invoices, stationery and business
    cards containing IMS's trademarks and logos no later than 30 days after the
    Closing and (ii) nothing herein contained shall require or be construed to
    require TriZetto or Merger Sub to cause customers of the Surviving
    Corporation to take any action with respect to property of the Surviving
    Corporation created prior to the Closing Date and in the possession of any
    such customers or property of customers created prior to the Closing Date in
    the

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    possession of the Surviving Corporation. TriZetto agrees that neither
    TriZetto, the Surviving Corporation, nor any of their affiliates shall make
    any use of IMS's trademarks and logos from and after the expiration of
    60 days.

        7.12  INTERCOMPANY SERVICES.  At the Closing, all data processing,
    internal accounting, insurance, personnel, legal, telephone and other
    services provided to Erisco by IMS or its affiliates (other than Erisco)
    shall terminate without any liability or obligation, other than the specific
    arrangements set forth in the Transitional Services Agreements.

        7.13  PREFERRED VENDOR STATUS.  TriZetto shall be the preferred
    application services provider and transformation services provider to IMS
    from the date hereof and for a period of five (5) years following the
    Closing Date. As the preferred provider, to the extent that TriZetto offers
    application services and transformation services, including consulting and
    implementation services, that IMS seeks to obtain from a third party, at
    levels of price, quality and service that are competitive with the levels
    obtainable by IMS in an arm's length transaction with a third party,
    TriZetto will be given the first opportunity to submit bids to provide such
    services. After the date hereof, each of the parties agrees to cooperate in
    good faith and use their respective reasonable best efforts to formalize the
    terms of such preferred vendor status in an agreement mutually acceptable to
    both parties.

        7.14  ASP AGREEMENT.  Erisco and TriZetto will cooperate in good faith
    and use their respective reasonable best efforts to enter into an agreement
    whereby TriZetto would become an application services provider for Erisco
    within ten (10) days following the date of this Agreement. The terms and
    conditions of such agreement will be at least as favorable to IMS in every
    material respect as similar agreements entered into between TriZetto and
    third parties.

        7.15  ERISCO EMPLOYEE OPTIONS.

           (A)  TRIZETTO OPTIONS.  Subject to necessary board and stockholder
       approval, as soon as practicable after the Closing, TriZetto will issue
       options (the "ERISCO EMPLOYEE OPTIONS") to purchase an aggregate of
       1,200,000 shares of TriZetto Common Stock to Erisco employees.

           (B)  IMS OPTIONS.  IMS will cause the options to purchase capital
       stock of IMS held by Erisco employees immediately prior to the Closing to
       be treated as follows: (i) all unvested options held by the Erisco
       employees pursuant to the IMS Health Incorporated Employees' Stock
       Incentive Plan (the "ESIP") will be fully vested at or before the
       Closing, with other terms applicable to ESIP options governed by the
       provisions of the ESIP and the applicable option agreement; (ii) all
       unvested options held by Erisco employees pursuant to the 1998 IMS Health
       Incorporated Replacement Plan for Certain Employees Holding Cognizant
       Corporation Equity-Based Awards (the "COGNIZANT PLAN") will be accorded
       "retirement" status under the Cognizant Plan, with the term of such
       options to expire upon the second anniversary of the Closing and with
       other terms applicable to such options governed by the provisions of the
       Cognizant Plan and the applicable option agreement; (iii) all "Year 2000"
       options pursuant to the Cognizant Plan (such options relating to 107,293
       shares) will be fully vested and exercisable at or before the Closing,
       with the term of such options to expire upon the second anniversary of
       the Closing and with other terms applicable to such options governed by
       the provisions of the Cognizant Plan and the applicable option agreement;
       (iv) all options, other than the options covered by clauses (iii) and
       (iv), held by Erisco employees pursuant to the Cognizant Plan shall be
       governed by the terms of the Cognizant Plan and the applicable option
       agreement, except to the extent that specified Erisco employees may be
       accorded more favorable terms as set forth in a separate letter dated as
       of the date hereof from IMS to TriZetto (the "OPTIONS LETTER"); and (v),
       the terms set forth in the foregoing clauses notwithstanding, each Erisco
       employee who meets the non-discretionary definition of

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       "retirement" under the ESIP or Cognizant Plan at the Closing will be
       deemed "retired" with respect to all options then held by to such
       employee pursuant to such Plans.

    8.  TAX MATTERS.

        8.1  LIABILITY FOR TAXES AND RELATED MATTERS.

           (A)  IMS'S INDEMNIFICATION OF TRIZETTO.  IMS shall be liable for and
       indemnify TriZetto for all Taxes (including, without limitation, any
       obligation to contribute to the payment of a tax determined on a
       consolidated, combined or unitary basis with respect to a group of
       corporations that includes or included Erisco and Taxes resulting from
       Erisco ceasing to be a member of IMS's group) (i) imposed on IMS's group
       (other than Erisco) for any taxable year and (ii) imposed on Erisco or
       for which Erisco may otherwise be liable for any taxable year or period
       that ends on or before the Closing Date and, with respect to any taxable
       year or period beginning before and ending after the Closing Date, the
       portion of such taxable year ending on and including the Closing Date.
       IMS shall also indemnify, defend and hold harmless TriZetto from all
       costs and expenses incurred by TriZetto (including reasonable attorneys'
       fees and expenses) in connection with any liability to, or claim by, any
       taxing authority, for Taxes for which IMS is required to indemnify
       TriZetto under this Section 8. Except as set forth in Section 8.1(e), IMS
       shall be entitled to any refund of Taxes of Erisco received for such
       periods.

           (B)  TRIZETTO'S INDEMNIFICATION OF IMS.  TriZetto shall be liable for
       and indemnify IMS for the Taxes of Erisco for any taxable year or period
       that begins after the Closing Date and, with respect to any taxable year
       or period beginning before and ending after the Closing Date, the portion
       of such taxable year beginning after the Closing Date. TriZetto shall
       also indemnify, defend and hold harmless IMS from all costs and expenses
       incurred by IMS (including reasonable attorneys' fees and expenses) in
       connection with any liability to, or claim by, any taxing authority, for
       Taxes for which TriZetto is required to indemnify IMS under this
       Section 8. TriZetto shall be entitled to any refund of Taxes of Erisco
       received for such periods.

           (C)  TAXES FOR SHORT TAXABLE YEAR.  For purposes of paragraphs
       (a) and (b) of this Section 8.1, whenever it is necessary to determine
       the liability for Taxes of Erisco for a portion of a taxable year or
       period that begins before and ends after the Closing Date, the
       determination of the Taxes of Erisco for the portion of the year or
       period ending on, and the portion of the year or period beginning after,
       the Closing Date shall be determined by assuming that Erisco had a
       taxable year or period which ended at the close of the Closing Date,
       except that exemptions, allowances or deductions that are calculated on
       an annual basis, such as the deduction for depreciation, shall be
       apportioned on a time basis.

           (D)  TREATMENT OF INDEMNITY PAYMENTS.  Any payments pursuant to this
       Section 8 shall be made by wire transfer of immediately available funds.

           (E)  REFUNDS FROM CARRYBACKS.  If IMS becomes entitled to a refund or
       credit of Taxes for any period for which it is liable under
       Section 8.1(a) to indemnify TriZetto and such refund or credit is
       attributable solely to the carryback of losses, credits or similar items
       attributable to Erisco and from a taxable year or period that begins
       after the Closing Date, IMS shall promptly pay to TriZetto the amount of
       such refund or credit together with any interest thereon. In the event
       that any refund or credit of Taxes for which a payment has been made is
       subsequently reduced or disallowed, TriZetto shall indemnify and hold
       harmless IMS for any tax liability, including interest and penalties,
       assessed against IMS by reason of the reduction or disallowance.

           (F)  RETENTION OF CARRYOVERS.  IMS will not elect to retain any net
       operating loss carryovers or capital loss carryovers of Erisco under
       Treasury Regulation Section 1.1502-20(g).

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<PAGE>
           (G)  TAX RETURNS.  IMS shall file or cause to be filed when due all
       Returns that are required to be filed by or with respect to Erisco for
       taxable years or periods ending on or before the Closing Date and shall
       pay any Taxes due in respect of such Returns, and TriZetto shall file or
       cause to be filed when due all Returns that are required to be filed by
       or with respect to Erisco for taxable years or periods ending after the
       Closing Date and shall remit any Taxes due in respect of such Returns.
       IMS shall pay TriZetto the Taxes for which IMS is liable pursuant to
       Section 8.1(a) but which are payable with Returns to be filed by TriZetto
       pursuant to the previous sentence within 10 days prior to the due date
       for the filing of such Returns. IMS shall have the right to review and
       comment on any Returns required to be filed by TriZetto pursuant to this
       Section 8.1(g) with respect to taxable years or periods for which IMS is
       liable in whole or in part pursuant to Section 8.1(a).

           (H)  CONTEST PROVISIONS.  TriZetto shall promptly notify IMS in
       writing upon receipt by TriZetto, any of its affiliates or Erisco of
       notice of any pending or threatened federal, state, local or foreign
       income or franchise tax audits or assessments which may materially affect
       the tax liabilities of Erisco for which IMS would be required to
       indemnify TriZetto pursuant to Section 8.1(a), PROVIDED that failure to
       comply with this provision shall not affect TriZetto's right to
       indemnification hereunder, except to the extent that IMS is prejudiced by
       such failure. IMS shall have the sole right to represent Erisco's
       interests in any tax audit or administrative or court proceeding relating
       to taxable periods ending on or before the Closing Date, and to employ
       counsel of its choice at its expense. Notwithstanding the foregoing, IMS
       shall not be entitled to settle, either administratively or after the
       commencement of litigation, any claim for Taxes which would adversely
       affect the liability for Taxes of TriZetto or Erisco for any period after
       the Closing Date to any extent (including, but not limited to, the
       imposition of income tax deficiencies, the reduction of asset basis or
       cost adjustments, the lengthening of any amortization or depreciation
       periods, the denial of amortization or depreciation deductions, or the
       reduction of loss or credit carryforwards) without the prior written
       consent of TriZetto. Such consent shall not be unreasonably withheld, and
       shall not be necessary to the extent that IMS has indemnified TriZetto
       against the effects of any such settlement. IMS shall be entitled to
       participate at its expense in the defense of any claim for Taxes for a
       year or period ending after the Closing Date which may be the subject of
       indemnification by IMS pursuant to Section 8.1(a) and, with the written
       consent of TriZetto, and at its sole expense, may assume the entire
       defense of such tax claim. Neither TriZetto nor Erisco may agree to
       settle any tax claim for the portion of the year or period ending on the
       Closing Date which may be the subject of indemnification by IMS under
       Section 8.1(a) without the prior written consent of IMS, which consent
       shall not be unreasonably withheld.

        8.2  ASSISTANCE AND COOPERATION.  After the Closing Date, each of IMS
    and TriZetto shall:

           (A) assist (and cause their respective affiliates to assist) the
       other party in preparing any Returns or reports which such other party is
       responsible for preparing and filing in accordance with this Section 8;

           (B) cooperate fully in preparing for any audits of, or disputes with
       taxing authorities regarding, any Returns of Erisco;

           (C) make available to the other and to any taxing authority as
       reasonably requested all information, records, and documents relating to
       Taxes of Erisco;

           (D) provide timely notice to the other in writing of any pending or
       threatened tax audits or assessments of Erisco for taxable periods for
       which the other may have a liability under this Section 8, PROVIDED, that
       failure to comply with this provision shall not affect the other party's
       rights to indemnification hereunder to the extent that the indemnifying
       party is not prejudiced by such failure; and

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<PAGE>
           (E) furnish the other with copies of all correspondence received from
       any taxing authority in connection with any tax audit or information
       request with respect to any such taxable period.

        8.3  TAX SHARING AGREEMENTS.  Any and all tax sharing, tax indemnity, or
    tax allocation agreements with respect to which Erisco was a party at any
    time prior to the Closing shall terminate upon the Closing. No further
    amounts shall be payable by or to Erisco under such agreements following the
    Closing.

        8.4  SURVIVAL OF OBLIGATIONS.  The obligations of the parties set forth
    in this Section 8 shall be unconditional and absolute and shall terminate
    upon the expiration of the statute of limitations applicable to the Taxes at
    issue.

    9.  INDEMNIFICATION.

        9.1  SURVIVAL OF REPRESENTATIONS, WARRANTIES AND COVENANTS.  All
    representations, warranties and covenants of the parties contained in this
    Agreement will survive the Closing until June 30, 2001, whereupon such
    representations, warranties and covenants will expire (except for covenants
    that by their terms survive for a longer period).

        9.2  INDEMNIFICATION OF TRIZETTO AND MERGER SUB.  Subject to the
    limitations contained in this Section 9, IMS shall defend, indemnify and
    hold harmless TriZetto and Merger Sub and their respective officers,
    directors, stockholders, employees and agents from and against any and all
    losses, claims, judgments, liabilities, demands, charges, suits, penalties,
    costs or expenses, including court costs and attorneys' fees ("CLAIMS AND
    LIABILITIES") with respect to or arising from (i) the breach of any warranty
    or any inaccuracy of any representation made by IMS or Erisco in this
    Agreement, or (ii) the breach of any covenant or agreement made by IMS or
    Erisco in this Agreement (other than with respect to the matters referred to
    in Section 8, as to which the indemnification provisions set forth in
    Section 8 shall govern).

        9.3  INDEMNIFICATION OF IMS.  Subject to the limitations contained in
    this Section 9, TriZetto and Merger Sub shall, jointly and severally,
    defend, indemnify and hold harmless IMS and its subsidiaries' and their
    respective officers, directors, stockholders, employees and agents from and
    against any and all Claims and Liabilities with respect to or arising from
    (i) the breach of any warranty or any inaccuracy of any representation made
    by TriZetto or Merger Sub in this Agreement, or (ii) the breach of any
    covenant or agreement made by TriZetto or Merger Sub in this Agreement
    (other than with respect to the matters referred to in Section 8, as to
    which the indemnification provisions set forth in Section 8 shall govern).

        9.4  LIMITATIONS ON INDEMNIFICATION.

           (A) Notwithstanding anything to the contrary contained herein,
       neither IMS, on the one hand, nor TriZetto and Merger Sub, on the other
       hand, shall be liable to TriZetto and Merger Sub or IMS, or any of their
       respective subsidiaries or any directors, officers, employees or agents
       of any of the foregoing, as applicable, for any Claims and Liabilities
       which such party(ies) would otherwise be entitled to indemnification
       pursuant to Section 9.2 or 9.3 in respect of, unless the aggregate amount
       of all such Claims and Liabilities incurred by such party(ies) exceeds
       $4,000,000 (the "DEDUCTIBLE AMOUNT"), in which event such party(ies)
       shall be liable only for the amount of such Claims and Liabilities which
       exceeds the Deductible Amount; provided, that the aggregate liability of
       IMS, on the one hand, and TriZetto and Merger Sub, on the other hand,
       under this Section 9 (other than with respect to any intentional or
       willful breach or failure to perform) shall in no event exceed
       $100,000,000.

           (B) Anything to the contrary notwithstanding, neither IMS, on the one
       hand, nor TriZetto and Merger Sub, on the other hand, shall be liable to
       TriZetto and Merger Sub or

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<PAGE>
       IMS, or any of their respective subsidiaries or any directors, officers,
       employees or agents of any of the foregoing, as applicable, in respect of
       any Claims and Liabilities which are covered by insurance owned by such
       party(ies) to the extent that any net loss is reduced by such insurance.
       To the extent quantifiable, the parties shall make appropriate
       adjustments to take into account the tax benefits or costs in determining
       the amount of indemnification to be provided hereunder.

        9.5  CLAIMS PROCEDURE.  Promptly after the receipt by any indemnified
    party (the "INDEMNITEE") of notice of the commencement of any action or
    proceeding against such Indemnitee, such Indemnitee shall, if a claim with
    respect thereto is or may be made against any indemnifying party (the
    "INDEMNIFYING PARTY") pursuant to this Section 9, give such Indemnifying
    Party written notice of the commencement of such action or proceeding and
    give such Indemnifying Party a copy of such claim and/or process and all
    legal pleadings in connection therewith. The failure to give such notice
    shall not relieve any Indemnifying Party of any of its indemnification
    obligations contained in this Section 9, except where, and solely to the
    extent that, such failure actually and materially prejudices the rights of
    such Indemnifying Party. Such Indemnifying Party shall have, upon request
    within thirty (30) days after receipt of such notice, but not in any event
    after the settlement or compromise of such claim, the right to defend, at
    his or its own expense and by his or its own counsel reasonably acceptable
    to the Indemnitee, any such matter involving the asserted liability of the
    Indemnitee. In any event, the Indemnitee, such Indemnifying Party and its
    counsel shall cooperate in the defense against, or compromise of, any such
    asserted liability, and in cases where the Indemnifying Party shall have
    assumed the defense, the Indemnitee shall have the right to participate in
    the defense of such asserted liability at the Indemnitee's own expense. In
    the event that such Indemnifying Party shall decline to participate in or
    assume the defense of such action, prior to paying or settling any claim
    against which such Indemnifying Party is, or may be, obligated under this
    Section 9 to indemnify an Indemnitee, the Indemnitee shall first supply such
    Indemnifying Party with a copy of a final court judgment or decree holding
    the Indemnitee liable on such claim or, failing such judgment or decree, the
    terms and conditions of the settlement or compromise of such claim. An
    Indemnity's failure to supply such final court judgment or decree or the
    terms and conditions of a settlement or compromise to such Indemnifying
    Party shall not relieve such Indemnifying Party of any of its
    indemnification obligations contained in this Section 9, except where, and
    solely to the extent that, such failure actually and materially prejudices
    the rights of such Indemnifying Party. If the Indemnifying Party is
    defending the claim as set forth above, the Indemnifying Party shall have
    the right to settle the claim only with the consent of the Indemnitee;
    PROVIDED, HOWEVER, that if the Indemnitee shall fail to consent to the
    settlement of such a claim by the Indemnifying Party, which settlement
    (i) the claimant has indicated it will accept, and (ii) includes an
    unconditional release of the Indemnitee and its affiliates by the claimant
    and imposes no material restrictions on the future activities of the
    Indemnitee and its affiliates, the Indemnifying Party shall have no
    liability with respect to any payment required to be made to such claimant
    in respect of such claim in excess of the proposed amount of settlement. If
    the Indemnitee is defending the claim as set forth above, the Indemnitee
    shall have the right to settle or compromise any claim against it after
    consultation with, but without the prior approval of, any Indemnifying
    Party; PROVIDED, HOWEVER, that such settlement or compromise shall not,
    unless consented to in writing by such Indemnifying Party, which shall not
    be unreasonably withheld, be conclusive as to the liability of such
    Indemnifying Party to the Indemnitee.

        9.6  TREATMENT OF INDEMNITY PAYMENTS.  Any payments pursuant to this
    Section 9 shall be made by wire transfer of immediately available funds.

        9.7  EXCLUSIVE REMEDY.  Each of the parties hereto acknowledges and
    agrees that, from and after the Closing Date, its sole and exclusive
    monetary remedy with respect to any and all claims

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<PAGE>
    relating to the subject matter of this Agreement shall be pursuant to the
    indemnification provisions set forth in this Section 9, except that nothing
    in this Agreement shall be deemed, to constitute a waiver of (A) any
    injunctive or other equitable remedies or (B) any tort claims of, or causes
    of action arising from, intentionally fraudulent misrepresentation or
    deceit.

    10.  CONDITIONS PRECEDENT TO OBLIGATIONS OF IMS AND ERISCO.

    The obligations of IMS and Erisco hereunder are subject to the satisfaction
or waiver, on or before the Closing, of each of the following conditions:

        10.1  ACCURACY OF REPRESENTATIONS AND WARRANTIES.  The representations
    and warranties of TriZetto set forth in Section 4 (as qualified by the
    TriZetto Disclosure Letter) shall be true and accurate in every material
    respect on and as of the date of this Agreement and on and as of the Closing
    Date with the same force and effect as if they had been made at the Closing
    except to the extent (i) any such representation or warranty expressly
    speaks as of an earlier date or (ii) the failure of such representations and
    warranties to be true and accurate in such respects has not had and is not
    reasonably likely to have a Material Adverse Effect on TriZetto, and IMS
    shall have received a certificate to such effect executed by TriZetto's
    Chief Executive Officer and Chief Financial Officer.

        10.2  COVENANTS.  TriZetto and Merger Sub shall have performed and
    complied in all material respects with all of the covenants required to be
    performed by it under this Agreement on or before the Closing, except where
    any nonperformance or noncompliance would not have a Material Adverse Effect
    on TriZetto, and IMS shall have received a certificate to such effect signed
    by TriZetto's Chief Executive Officer and Chief Financial Officer.

        10.3  ABSENCE OF MATERIAL ADVERSE CHANGE.  There shall not have been any
    material adverse change in the financial condition, properties, assets,
    liabilities, businesses or results of operations of TriZetto and the
    TriZetto Subsidiaries, taken as a whole, or in the ability of TriZetto and
    Merger Sub to consummate the Merger, other than any change that shall result
    from general economic conditions or conditions generally affecting the
    industry in which TriZetto conducts operations (a "TRIZETTO MATERIAL ADVERSE
    CHANGE").

        10.4  COMPLIANCE WITH LAW.  There shall be no order, decree or ruling by
    any governmental agency or written threat thereof, or any statute, rule,
    regulation or order enacted, entered, enforced or deemed applicable to the
    Merger, which would prohibit or render illegal the transactions contemplated
    by this Agreement.

        10.5  GOVERNMENT CONSENTS.  There shall have been obtained on or before
    the Closing such material permits or authorizations, and there shall have
    been taken such other action, as may be required to consummate the Merger by
    any regulatory authority having jurisdiction over the parties and the
    actions herein proposed to be taken, including but not limited to
    requirements under applicable federal and state securities laws and the
    compliance with, and expiration of any applicable waiting period under, the
    HSR Act.

        10.6  PROXY STATEMENT.  The Proxy Statement shall not be subject to any
    proceedings commenced or threatened by the SEC.

        10.7  DOCUMENTS.  IMS shall have received all written consents,
    assignments, waivers, authorizations or other certificates reasonably deemed
    necessary by IMS's legal counsel to provide for the continuation in full
    force and effect of any and all material Contracts of TriZetto and the
    TriZetto subsidiaries and for TriZetto and Merger Sub to consummate the
    transactions contemplated hereby except when the failure to receive such
    consents, assignments, waivers, authorizations or other certificates is not
    reasonably likely to have a Material Adverse Effect on TriZetto.

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        10.8  TRIZETTO APPROVALS.  The TriZetto Proposal shall have been duly
    approved by the TriZetto Stockholders in accordance with the rules of the
    Nasdaq, applicable law and TriZetto's Certificate of Incorporation and
    Bylaws.

        10.9  NO LEGAL ACTION.  No temporary restraining order, preliminary
    injunction or permanent injunction or other order preventing the
    consummation of the Merger shall have been issued by any Federal or state
    court and remain in effect, nor shall any proceeding initiated by the United
    States Federal government seeking any of the foregoing be pending.

        10.10  ELECTION OF IMS DESIGNEES TO BOARD OF DIRECTORS OF TRIZETTO.  The
    Board of Directors of TriZetto shall have taken appropriate action to cause
    one individual designated by IMS be appointed to the Board of Directors of
    TriZetto as a Class II director effective upon the Effective Time in
    accordance with Section 6.10.

        10.11  TAX OPINION.  IMS shall have received the opinion of Sullivan &
    Cromwell, counsel to IMS, dated the Closing Date, to the effect that the
    Merger will be treated for United States federal income tax purposes as a
    reorganization within the meaning of Section 368(a) of the Code, and that
    each of Erisco, Merger Sub and TriZetto will be a party to that
    reorganization within the meaning of Section 368(b) of the Code, provided,
    that if Sullivan & Cromwell does not render such opinion, this condition
    shall nonetheless be deemed satisfied if Stradling Yocca Carlson & Rauth
    renders such opinion to IMS; it being understood that in rendering such
    opinion, such counsel shall be entitled to rely on, and IMS and TriZetto
    agree to provide reasonable cooperation to provide, certain customary
    representations and assumptions

        10.12  NASDAQ LISTING.  The shares of TriZetto Common Stock issuable to
    IMS pursuant to this Agreement shall have been approved for quotation on the
    Nasdaq, upon official notice of issuance.

        10.13  REGISTRATION RIGHTS AGREEMENT.  IMS, Erisco and TriZetto shall
    have entered into the Registration Rights Agreement.

        10.14  STOCKHOLDER AGREEMENT.  IMS, Erisco and TriZetto shall have
    entered into the Stockholder Agreement.

        10.15  TRANSITIONAL SERVICES AGREEMENTS.  IMS and TriZetto shall have
    entered into the Transitional Services Agreements.

        10.16  DATA RIGHTS AGREEMENT.  IMS and TriZetto shall have entered into
    the Data Rights Agreement.

        10.17  HEALTHWEB LICENSE AGREEMENT.  IMS and TriZetto shall have entered
    into the HealthWeb License Agreement.

        10.18  LEGAL OPINION.  IMS shall have received one or more opinions of
    counsel to TriZetto and Merger Sub, in a customary form for transactions of
    the type contemplated by this Agreement, that collectively will cover the
    due incorporation and good standing of TriZetto and Merger Sub and the due
    authorization, execution, delivery, validity and enforceability of the Basic
    Documents with respect to TriZetto and Merger Sub.

    11.  CONDITIONS PRECEDENT TO OBLIGATIONS OF TRIZETTO AND MERGER SUB.

    The obligations of TriZetto and Merger Sub hereunder are subject to the
satisfaction or waiver, on or before the Closing, of each of the following
conditions:

        11.1  ACCURACY OF REPRESENTATIONS AND WARRANTIES.  The representations
    and warranties of IMS and Erisco set forth in Section 3 (as qualified by the
    IMS Disclosure Letter) shall be true and accurate in every material respect
    on and as of the date of this Agreement and on and as of the

                                      A-45
<PAGE>
    Closing Date with the same force and effect as if they had been made at the
    Closing except to the extent (i) any such representation or warranty
    expressly speaks as of an earlier date or (ii) the failure of such
    representations and warranties to be true and accurate in such respects is
    not reasonably likely to have a Material Adverse Effect on Erisco, and
    TriZetto shall have received a certificate to such effect executed by IMS's
    and Erisco's Chief Executive Officer and Chief Financial Officer.

        11.2  COVENANTS.  Each of Erisco and IMS shall have performed and
    complied in all material respects with all of the covenants required to be
    performed by it under this Agreement on or before the Closing, except where
    any nonperformance or noncompliance would not have a Material Adverse Effect
    on Erisco, and TriZetto shall receive a certificate to such effect signed by
    Erisco's and IMS's Chief Executive Officer and Chief Financial Officer.

        11.3  ABSENCE OF MATERIAL ADVERSE CHANGE.  There shall not have been any
    material adverse change in the financial condition, properties, assets,
    liabilities, businesses or results of operations of Erisco or in the ability
    of IMS and Erisco to consummate the Merger and the other transactions
    contemplated hereby, other than any change that shall result from general
    economic conditions or conditions generally affecting the industry in which
    Erisco conducts operations (an "ERISCO MATERIAL ADVERSE CHANGE").

        11.4  COMPLIANCE WITH LAW.  There shall be no order, decree or ruling by
    any governmental agency or written threat thereof, or any statute, rule,
    regulation or order enacted, entered, enforced or deemed applicable to the
    Merger, which would prohibit or render illegal the transactions contemplated
    by this Agreement.

        11.5  GOVERNMENT CONSENTS.  There shall have been obtained on or before
    the Closing such material permits or authorizations, and there shall have
    been taken such other action, as may be required to consummate the Merger by
    any regulatory authority having jurisdiction over the parties and the
    actions herein proposed to be taken, including but not limited to
    requirements under applicable federal and state securities laws and the
    compliance with, and expiration of any applicable waiting period under, the
    HSR Act.

        11.6  PROXY STATEMENT.  The Proxy Statement shall not be subject to any
    proceedings commenced or threatened by the SEC.

        11.7  DOCUMENTS.  TriZetto shall have received all written consents,
    assignments, waivers, authorizations or other certificates reasonably deemed
    necessary by TriZetto's legal counsel to provide for the continuation in
    full force and effect of any and all material Contracts of Erisco and for
    IMS and Erisco to consummate the transactions contemplated hereby except
    when the failure to receive such consents, assignments, waivers,
    authorizations or other certificates is not reasonably likely to have a
    Material Adverse Effect on Erisco.

        11.8  STOCKHOLDER APPROVAL.  The TriZetto Proposal shall have been duly
    approved by the TriZetto Stockholders in accordance with the rules of the
    Nasdaq, applicable law and TriZetto's Certificate of Incorporation and
    Bylaws.

        11.9  NO LEGAL ACTION.  No temporary restraining order, preliminary
    injunction or permanent injunction or other order preventing the
    consummation of the Merger shall have been issued by any Federal or state
    court and remain in effect, nor shall any proceeding initiated by the United
    States Federal government seeking any of the foregoing be pending.

        11.10  TAX OPINION.  TriZetto shall have received the opinion of
    Stradling Yocca Carlson & Rauth, counsel to TriZetto and Merger Sub, dated
    the Closing Date, to the effect that the Merger will be treated for United
    States federal income tax purposes as a reorganization within the meaning of
    Section 368(a) of the Code, and that each Erisco, Merger Sub and TriZetto
    will be a

                                      A-46
<PAGE>
    party to that reorganization within the meaning of Section 368(b) of the
    Code, provided, that if Stradling Yocca Carlson & Rauth does not render such
    opinion, this condition shall nonetheless be deemed satisfied if Sullivan &
    Cromwell renders such opinion to TriZetto; it being understood that in
    rendering such opinion, such counsel shall be entitled to rely on, and IMS
    and TriZetto agree to provide reasonable cooperation in providing, certain
    customary representations and assumptions.

        11.11  NASDAQ LISTING.  The shares of TriZetto Common Stock issuable to
    IMS pursuant to this Agreement shall have been approved for quotation on the
    Nasdaq, upon official notice of issuance.

        11.12  REGISTRATION RIGHTS AGREEMENT.  IMS and TriZetto shall have
    entered into the Registration Rights Agreement.

        11.13  STOCKHOLDER AGREEMENT.  IMS and TriZetto shall have entered into
    the Stockholder Agreement.

        11.14  TRANSITIONAL SERVICES AGREEMENTS.  IMS, Erisco and TriZetto shall
    have entered into the Transitional Services Agreements.

        11.15  HEALTHWEB LICENSE AGREEMENT.  IMS and TriZetto shall have entered
    into the HealthWeb License Agreement.

        11.16  LEGAL OPINION.  TriZetto shall have received one or more opinions
    of counsel to IMS and Erisco, in a customary form for transactions of the
    type contemplated by this Agreement, that collectively will cover the due
    incorporation and good standing of Erisco and the due authorization,
    execution, delivery, validity and enforceability of the Basic Documents with
    respect to IMS and Erisco.

    12.  TERMINATION OF AGREEMENT.

        12.1  TERMINATION.  This Agreement may be terminated at any time prior
    to the Effective Time, whether before or after approval of the Merger by the
    stockholders of TriZetto:

           (A) by mutual agreement of IMS and TriZetto;

           (B) by IMS, if there has been a breach by TriZetto of any
       representation, warranty, covenant or agreement set forth in this
       Agreement on the part of TriZetto, or if any representation of TriZetto
       shall have become untrue, such that Section 10.1 or 10.2 would not be
       satisfied and which TriZetto fails to cure prior to the Closing (except
       that no cure period shall be provided for a breach by TriZetto which by
       its nature cannot be cured);

           (C) by TriZetto, if there has been a breach by IMS of any
       representation. warranty, covenant or agreement set forth in this
       Agreement on the part of IMS, or if any representation of IMS shall have
       become untrue, such that Section 11.1 or 11.2 would not be satisfied and
       which IMS fails to cure prior to the Closing (except that no cure period
       shall be provided for a breach by IMS which by its nature cannot be
       cured);

           (D) by either IMS or TriZetto, if the TriZetto Meeting shall have
       been held and the required approval of the stockholders of TriZetto shall
       not have been obtained by reason of the failure to obtain the required
       vote;

           (E) by either IMS or TriZetto, if all the conditions for Closing the
       Merger set forth in Sections 10 and 11 hereof shall not have been
       satisfied or waived on or before the Final Date (as defined below) other
       than as a result of a breach of this Agreement by the terminating party,
       or, in the case of TriZetto, a breach by any of the Designated
       Stockholders of the Voting Agreements in the event TriZetto does not
       obtain stockholder approval of the TriZetto Proposal; or

                                      A-47
<PAGE>
           (F) by either IMS or TriZetto, if a permanent injunction or other
       order by any Federal or state court which would make illegal or otherwise
       restrain or prohibit the consummation of the Merger shall have been
       issued and shall have become final and nonappealable.

        As used herein, the "FINAL DATE" shall be December 31, 2000.

        12.2  NOTICE OF TERMINATION.  Any termination of this Agreement under
    Section 12.1 above will be effective by the delivery of written notice of
    IMS or TriZetto, as the case may be, to TriZetto or IMS, as applicable.

        12.3  EFFECT OF TERMINATION.  In the case of any termination of this
    Agreement as provided in this Section 12, this Agreement shall be of no
    further force and effect (except as expressly provided herein); provided,
    that except as otherwise provided herein, no such termination shall relieve
    any party from liability for any breach of this Agreement prior to such
    termination. No termination of this Agreement shall affect the obligations
    contained in the Confidentiality Agreement, all of which will survive
    termination of this Agreement in accordance with their terms.

    13.  MISCELLANEOUS.

        13.1  GOVERNING LAW AND VENUE; WAIVER OF JURY TRIAL.  The laws of the
    State of Delaware (irrespective of its choice of law principles) will govern
    the validity of this Agreement, the construction of its terms and the
    interpretation and enforcement of the rights and duties of the parties
    hereto. The parties hereby irrevocably submit to the jurisdiction of the
    courts of the State of Delaware and the Federal courts of the United States
    of America located in the State of Delaware solely in respect of the
    interpretation and enforcement of the provisions of this Agreement and of
    the documents referred to in this Agreement, and in respect of the
    transactions contemplated hereby and thereby, and hereby waive, and agree
    not to assert, as a defense in any action, suit or proceeding for the
    interpretation or enforcement hereof or of any such document, that it is not
    subject thereto or that such action, suit or proceeding may not be brought
    or is not maintainable in said courts or that the venue thereof may not be
    appropriate or that this Agreement or any such document may not be enforced
    in or by such courts, and the parties hereto irrevocably agree that all
    claims with respect to such action or proceeding shall be heard and
    determined in such a Delaware State or Federal court. The parties hereby
    consent to and grant any such court jurisdiction over the person of such
    parties and over the subject matter of such dispute and agree that mailing
    of process or other papers in connection with any such action or proceeding
    in the manner provided in Section 13.9 or in such other manner as may be
    permitted by law shall be valid and sufficient service thereof. EACH PARTY
    ACKNOWLEDGES AND AGREES THAT ANY CONTROVERSY WHICH MAY ARISE UNDER THIS
    AGREEMENT IS LIKELY TO INVOLVE COMPLICATED AND DIFFICULT ISSUES, AND
    THEREFORE EACH SUCH PARTY HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVES ANY
    RIGHT SUCH PARTY MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY LITIGATION
    DIRECTLY OR INDIRECTLY ARISING OUT OF OR RELATING TO THIS AGREEMENT, OR THE
    TRANSACTIONS CONTEMPLATED BY THIS AGREEMENT. EACH PARTY CERTIFIES AND
    ACKNOWLEDGES THAT (i) NO REPRESENTATIVE, AGENT OR ATTORNEY OF ANY OTHER
    PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY WOULD
    NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVER,
    (ii) EACH PARTY UNDERSTANDS AND HAS CONSIDERED THE IMPLICATIONS OF THIS
    WAIVER, (iii) EACH PARTY MAKES THIS WAIVER VOLUNTARILY, AND (iv) EACH PARTY
    HAS BEEN INDUCED TO ENTER INTO THIS AGREEMENT BY, AMONG OTHER THINGS, THE
    MUTUAL WAIVERS AND CERTIFICATIONS IN THIS SECTION 13.1.

        13.2  ASSIGNMENT; BINDING UPON SUCCESSORS AND ASSIGNS.  No party hereto
    may assign any of its rights or obligations hereunder without the prior
    written consent of the other parties hereto.

                                      A-48
<PAGE>
    This Agreement will be binding upon and inure to the benefit of the parties
    hereto and their respective successors and permitted assigns.

        13.3  SEVERABILITY.  If any provision of this Agreement, or the
    application thereof, will for any reason and to any extent be invalid or
    unenforceable, the remainder of this Agreement and application of such
    provision to other Persons or circumstances will be interpreted so as
    reasonably to effect the intent of the parties hereto. The parties further
    agree to replace such void or unenforceable provision of this Agreement with
    a valid and enforceable provision that will achieve, to the greatest extent
    possible, the economic, business and other purposes of the void or
    unenforceable provision.

        13.4  COUNTERPARTS.  This Agreement may be executed in any number of
    counterparts, each of which will be an original as regards any party whose
    signature appears thereon and all of which together will constitute one and
    the same instrument. This Agreement will become binding when one or more
    counterparts hereof, individually or taken together, will bear the
    signatures of all the parties reflected hereon as signatories.

        13.5  OTHER REMEDIES.  Except as otherwise provided herein, any and all
    remedies herein expressly conferred upon a party will be deemed cumulative
    with and not exclusive of any other remedy conferred hereby or by law on
    such party, and the exercise of any one remedy will not preclude the
    exercise of any other. TriZetto, in addition to being entitled to exercise
    all rights provided herein and granted by law, including recovery of
    damages, will be entitled to specific performance of its rights under this
    Agreement. IMS and Erisco agree that monetary damages would not be adequate
    compensation for any loss incurred by reason of breach by IMS or Erisco of
    the provisions of this Agreement and hereby agrees to waive the defense in
    any action for specific performance that a remedy at law would be adequate.

        13.6  AMENDMENT AND WAIVERS.  Any term or provision of this Agreement
    may be amended, and the observance of any term of this Agreement may be
    waived (either generally or in a particular instance and either
    retroactively or prospectively) only by a writing signed by duly authorized
    officers of the party or parties to be bound thereby. The waiver by a party
    of any breach hereof or default in the performance hereof will not be deemed
    to constitute a waiver of any other default or any succeeding breach or
    default. This Agreement may be amended by the parties hereto at any time
    before or after approval of the TriZetto Stockholders, but, after such
    approval, no amendment will be made which by applicable law requires the
    further approval of the TriZetto Stockholders without obtaining such further
    approval.

        13.7  EXPENSES.  IMS will bear the legal, accounting, financial advisor
    and other fees and expenses incurred with respect to this Agreement and the
    transactions contemplated hereby by IMS and Erisco, including costs incurred
    to audit the financial statements of Erisco. TriZetto will bear its legal,
    accounting, financial advisor and other fees and expenses incurred with
    respect to this Agreement and the transactions contemplated hereby.

        13.8  ATTORNEYS' FEES.  Should suit be brought to enforce or interpret
    any part of this Agreement, the prevailing party will be entitled to
    recover, as an element of the costs of suit and not as damages, reasonable
    attorneys' fees to be fixed by the court (including, without limitation,
    costs, expenses and fees on any appeal).

        13.9  NOTICES.  All notices and other communications pursuant to this
    Agreement shall be in writing and deemed to be sufficient if contained in a
    written instrument and shall be deemed given if delivered personally, via
    facsimile, sent by nationally-recognized overnight courier or mailed by

                                      A-49
<PAGE>
    registered or certified mail (return receipt requested), postage prepaid, to
    the parties at the following address (or at such other address for a party
    as shall be specified by like notice):

<TABLE>
<S>                               <C>
If to IMS or Erisco:              IMS Health Incorporated
                                  200 Nyala Farms
                                  Westport, Connecticut 06880
                                  Attention: Chief Executive Officer
                                  Telecopy: (203) 222-4247

With a copy to:                   IMS Health Incorporated
                                  200 Nyala Farms
                                  Westport, Connecticut 06880
                                  Attention: David Stevens
                                           Jared Finkelstein
                                  Telecopy: (203) 222-4268

And to:                           Sullivan & Cromwell 125 Broad Street
                                  New York, New York 10004
                                  Attention: Alan J. Sinsheimer
                                           Keith A. Pagnani
                                  Telecopy: (212) 558-3588

And if to TriZetto or Merger
Sub:                              The TriZetto Group, Inc.
                                  567 San Nicolas Drive, Suite 367
                                  Newport Beach, California 92660
                                  Attention: Christine A. Miller
                                  Telecopy: (949) 219-2197

With a copy to:                   Stradling Yocca Carlson & Rauth
                                  660 Newport Center Drive, Suite 1600
                                  Newport Beach, CA 92660-6422
                                  Attention: K.C. Schaaf
                                           Michael E. Flynn
                                  Telecopy: (949) 725-4100
</TABLE>

    All such notices and other communications shall be deemed to have been
    received (a) in the case of personal delivery, on the date of such delivery,
    (b) in the case of a facsimile, when the party receiving such copy shall
    have confirmed receipt of the communication, (c) in the case of delivery by
    nationally-recognized overnight courier, on the business day following
    dispatch, and (d) in the case of mailing, on the third business day
    following such mailing.

        13.10  CONSTRUCTION OF AGREEMENT.  This Agreement has been negotiated by
    the respective parties hereto and their attorneys and the language hereof
    will not be construed for or against either party. A reference to a Section,
    Schedule or an Exhibit will mean a Section in, or Schedule or Exhibit to,
    this Agreement unless otherwise explicitly set forth. The titles and
    headings herein are for reference purposes only and will not in any manner
    limit the construction of this Agreement which will be considered as a
    whole. Whenever the words "include," "includes" or "including" are used in
    this Agreement, they shall be deemed to be followed by the words "without
    limitation."

        13.11  NO JOINT VENTURE.  Nothing contained in this Agreement will be
    deemed or construed as creating a joint venture or partnership between any
    of the parties hereto. No party is by virtue

                                      A-50
<PAGE>
    of this Agreement authorized as an agent, employee or legal representative
    of any other party. No party will have the power to control the activities
    and operations of any other. The status of the parties hereto is, and at all
    times, will continue to be, that of independent contractors with respect to
    each other. No party will have any power or authority to bind or commit any
    other. No party will hold itself out as having any authority or relationship
    in contravention of this Section.

        13.12  FURTHER ASSURANCES.  Each party agrees to cooperate fully with
    the other parties and to execute such further instruments, documents and
    agreements and to give such further written assurances as may be reasonably
    requested by any other party to evidence and reflect the transactions
    described herein and contemplated hereby and to carry into effect the
    intents and purposes of this Agreement.

        13.13  ABSENCE OF THIRD PARTY BENEFICIARY RIGHTS.  No provisions of this
    Agreement are intended, nor will be interpreted, to provide or create any
    third party beneficiary rights or any other rights of any kind in any
    client, customer, affiliate, stockholder, partner or employee or any other
    Person, and all provisions hereof will be personal solely between the
    parties to this Agreement.

        13.14  PUBLIC ANNOUNCEMENT.  Upon execution of this Agreement, TriZetto
    and IMS promptly will issue a joint press release approved by both parties
    announcing the Merger. Thereafter, TriZetto or IMS may issue such press
    releases, and make such other disclosure regarding the Merger, as it
    determines (after consultation with legal counsel) are required under
    applicable securities laws or Nasdaq or NYSE rules.

        13.15  ENTIRE AGREEMENT.  This Agreement, the Voting Agreements, the
    Stockholder Agreement, the Registration Rights Agreement, the Data Rights
    Agreement, the Transitional Services Agreements, the HealthWeb License
    Agreement, the IMS Disclosure Letter, the TriZetto Disclosure Letter and the
    Exhibits and Schedules hereto constitute the entire understanding and
    agreement of the parties hereto with respect to the subject matter hereof
    and supersede all prior and contemporaneous agreements or understandings,
    inducements or conditions, express or implied, written or oral, between the
    parties with respect hereto other than the Confidentiality Agreement, which
    shall remain in full force and effect. The express terms hereof control and
    supersede any course of performance or usage of trade inconsistent with any
    of the terms hereof.

                                      A-51
<PAGE>
    IN WITNESS WHEREOF, the parties hereto have executed this Agreement and Plan
of Reorganization as of the date first above written.

<TABLE>
<S>                                                    <C>  <C>
                                                       THE TRIZETTO GROUP, INC.

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

                                                       ELBEJAY ACQUISITION CORP.

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

                                                       IMS HEALTH INCORPORATED

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

                                                       ERISCO MANAGED CARE
                                                       TECHNOLOGIES, INC.

                                                       By:
                                                            -----------------------------------------
                                                            Name:
                                                            Title:
</TABLE>

                                      A-52
<PAGE>
                                                                      APPENDIX B

                        [LETTERHEAD OF UBS WARBURG LLC]

                                  May 16, 2000

The Board of Directors
The TriZetto Group, Inc.
567 Nicholas Drive, Suite 360
Newport Beach, California 92660

Dear Members of the Board:

    We understand that The TriZetto Group, Inc. ("TriZetto") is considering a
transaction whereby (i) Elbejay Acquisition Corp., a wholly owned subsidiary of
TriZetto ("Merger Sub"), will be merged (the "Merger") with and into ERISCO
Managed Care Technologies, Inc., a wholly owned subsidiary of IMS Health
Incorporated ("IMS Health" and, such subsidiary, "ERISCO"), and (ii) the
outstanding shares of the common stock, par value $0.01 per share, of ERISCO
("ERISCO Common Stock") will be converted, in the aggregate, into the right to
receive that number of shares of the common stock, par value $0.001 per share,
of TriZetto ("TriZetto Common Stock") derived by dividing $255,000,000 by the
average of the per share closing prices of TriZetto Common Stock as reported on
the NASDAQ National Market System for the 15 trading days ending on the third
trading day prior to the closing date of the Merger (the "Average Closing Price"
and, the total number of shares of TriZetto Common Stock to be so determined and
issuable in the Merger, the "Merger Consideration"); provided, that (x) if the
Average Closing Price is less than $21.00, the Merger Consideration will be
12,142,857 shares of TriZetto Common Stock or (y) if the Average Closing Price
is greater than $29.00, the Merger Consideration will be 8,793,103 shares of
TriZetto Common Stock. The terms and conditions of the Merger are more fully set
forth in an Agreement and Plan of Reorganization (the "Agreement") to be entered
into among TriZetto, Merger Sub, IMS Health and ERISCO.

    You have requested our opinion as to the fairness, from a financial point of
view, of the Merger Consideration to TriZetto.

    UBS Warburg LLC ("UBSW") has acted as financial advisor to TriZetto in
connection with the Merger and will receive a fee for its services, a portion of
which is contingent upon the consummation of the Merger and a significant
portion of which is payable upon delivery of this opinion. In the ordinary
course of business, UBSW, its successors and affiliates may trade securities of
TriZetto and IMS Health for their own accounts and accounts of customers and,
accordingly, may at any time hold a long or short position in such securities.

    Our opinion does not address TriZetto's underlying business decision to
effect the Merger or constitute a recommendation to any stockholder of TriZetto
as to how such stockholder should vote with respect to any matter relating to
the Merger. At your direction, we have not been asked to, nor do we, offer any
opinion as to the material terms of the Agreement or any related documents and
the obligations thereunder, or the form of the Merger. We express no opinion as
to what the value of TriZetto Common Stock will be when issued pursuant to the
Merger or the prices at which TriZetto Common Stock will trade or otherwise be
transferable subsequent to announcement or consummation of the Merger. In
rendering this opinion, we have assumed, with your consent, that each of
TriZetto, IMS Health and ERISCO will comply with all material covenants and
agreements set forth in, and other material terms of, the Agreement, as
applicable, and that the Merger will be validly consummated in accordance with
its terms.

                                      B-1
<PAGE>
The Board of Directors
The TriZetto Group, Inc.
May 16, 2000
Page 2

    In arriving at our opinion, we have, among other things: (i) reviewed
current and historical market prices and trading volumes of TriZetto Common
Stock; (ii) reviewed certain publicly available business and historical
financial information relating to TriZetto and ERISCO; (iii) reviewed certain
internal financial information and other data relating to the businesses and
financial prospects of TriZetto and ERISCO and the potential incremental
revenue, cost savings and other synergies anticipated to result from the Merger,
including estimates and financial forecasts prepared by the managements of
TriZetto, IMS Health and ERISCO, that were provided to or discussed with us by
TriZetto, IMS Health and ERISCO and are not publicly available; (iv) conducted
discussions with members of the senior managements of TriZetto, IMS Health and
ERISCO; (v) reviewed publicly available financial and stock market data with
respect to certain companies in lines of business we believe to be generally
comparable to those of TriZetto and ERISCO; (vi) reviewed a draft dated May 15,
2000 of the Agreement; and (vii) conducted such other financial studies,
analyses, and investigations, and considered such other information as we deemed
necessary or appropriate.

    In connection with our review, with your consent, we have not assumed any
responsibility for independent verification of any of the information provided
to or reviewed by us for the purpose of this opinion and have, with your
consent, relied on its being complete and accurate in all material respects. In
addition, at your direction, we have not made any independent evaluation or
appraisal of any of the assets or liabilities (contingent or otherwise) of
TriZetto or ERISCO, nor have we been furnished with any such evaluation or
appraisal. With respect to the financial forecasts and estimates referred to
above, we have assumed, at your direction, that they have been reasonably
prepared on a basis reflecting the best currently available estimates and
judgments of the managements of TriZetto, IMS Health and ERISCO as to the future
performance of TriZetto and ERISCO and the potential incremental revenue, costs
savings and other synergies (including the amount, timing and achievability
thereof) anticipated to result from the Merger. We also have assumed, with your
consent, that the Merger will be treated as a tax-free reorganization for
federal income tax purposes and that the Merger will be accounted for as a
purchase for financial accounting purposes. In addition, representatives of
TriZetto have advised us, and we therefore also have assumed, that the final
terms of the Agreement will not vary materially from those set forth in the
draft reviewed by us. Our opinion is necessarily based on economic, monetary,
market and other conditions as in effect on, and the information made available
to us as of, the date of this letter.

    Based upon and subject to the foregoing, it is our opinion that, as of the
date hereof, the Merger Consideration is fair, from a financial point of view,
to TriZetto.

                                          Very truly yours,
                                          /S/ UBS WARBURG LLC
                                          UBS WARBURG LLC

                                      B-2
<PAGE>
                                                                    APPENDIX C-1

                                VOTING AGREEMENT

    VOTING AGREEMENT (the "AGREEMENT"), dated as of March 28, 2000, among the
undersigned stockholders (the "STOCKHOLDERS") of The TriZetto Group, Inc., a
Delaware corporation ("TRIZETTO"), and IMS Health Incorporated, a Delaware
corporation ("IMS"). Except as otherwise provided herein, capitalized terms that
are used but not otherwise defined herein shall have the respective meanings
assigned to such terms in the Merger Agreement (as defined below).

    WHEREAS, contemporaneously with the execution and delivery of this
Agreement, TriZetto and IMS have entered into an Agreement and Plan of
Reorganization (the "MERGER AGREEMENT"), providing for, among other things, the
merger of IMS with and into TriZetto, the issuance of shares of TriZetto Common
Stock to IMS stockholders in connection with the Merger, certain amendments to
TriZetto's certificate of incorporation as set forth in the Merger Agreement
(the "TRIZETTO CHARTER AMENDMENTS"), and a new TriZetto stock option plan (the
"STOCK OPTION PLAN") in such form and with such number of available options
issuable thereunder as shall be agreed upon by TriZetto and IMS (collectively,
the "TRANSACTIONS"), upon the terms and subject to the conditions set forth in
the Merger Agreement, and setting forth certain representations, warranties,
covenants and agreements of the parties thereto in connection with the
Transactions;

    WHEREAS, the Merger Agreement contemplates the execution and delivery of
this Agreement;

    WHEREAS, in order to induce IMS to enter into the Merger Agreement, the
Stockholders wish to agree (i) to deliver to IMS an irrevocable proxy to Vote
(as defined in Section 2 hereof) the Shares (as defined in Section 1 hereof) and
any other shares of capital stock of TriZetto acquired hereafter and prior to
the termination of this Agreement so as to approve and adopt (a) the Merger
Agreement and the transactions contemplated thereby, (b) the issuance of
TriZetto Common Stock to IMS stockholders in connection with the Merger,
(c) the TriZetto Charter Amendments and (d) the Stock Option Plan, and (ii) not
to transfer or otherwise dispose of any of the Shares, or any other shares of
capital stock of TriZetto acquired hereafter and prior to the termination of
this Agreement.

    NOW, THEREFORE, for good and valuable consideration, the receipt,
sufficiency and adequacy of which are hereby acknowledged, the parties hereto
agree as follows:

    1.  REPRESENTATIONS OF STOCKHOLDERS.

    Each of the Stockholders represents and warrants to IMS that (a) such
Stockholder lawfully owns beneficially (as such term is defined in Rule 13d-3 of
the Exchange Act) and of record each of the shares of Common Stock, par value
$0.001 per share, of TriZetto (the "TRIZETTO COMMON STOCK"), set forth opposite
such Stockholder's name on EXHIBIT A hereto (such Stockholder's "SHARES") free
and clear of all liens, claims, charges, security interests or other
encumbrances and, except for this Agreement and the Merger Agreement, there are
no options, warrants or other rights, agreements, arrangements or commitments of
any character to which such Stockholder is a party relating to the pledge,
disposition or Voting of any shares of capital stock of TriZetto and there are
no Voting trusts or Voting agreements with respect to such Shares, (b) such
Stockholder does not beneficially own (as such term is used in Rule 13d-3 of the
Exchange Act) any shares of TriZetto Common Stock other than such Shares and
does not have any options, warrants or other rights to acquire any additional
shares of capital stock of TriZetto or any security exercisable for or
convertible into shares of capital stock of TriZetto other than those options,
warrants or other rights set forth opposite such Stockholder's name on
EXHIBIT B hereto (such Stockholder's "OPTIONS") and each Stockholder represents
and warrants that such Stockholder shall not exercise any such Options prior to
the termination of this Agreement except in accordance with Section 6 of this
Agreement, (c) such Stockholder has full power and authority and has taken all
actions necessary to enter into, execute and

                                     C-1-1
<PAGE>
deliver this Agreement and to perform fully such Stockholder's obligations
hereunder and this Agreement has been duly executed and delivered and
constitutes the legal, valid and binding obligation of such Stockholder
enforceable against such Stockholder in accordance with its terms, subject to
the Bankruptcy and Equity Exception, (d) other than filings under the Exchange
Act, no notices, reports or other filings are required to be made by such
Stockholder with, nor are any consents, registrations, approvals, permits or
authorizations required to be obtained by such Stockholder from, any
Governmental Entity, in connection with the execution and delivery of this
Agreement by such Stockholder, and (e) the execution, delivery and performance
of this Agreement by such Stockholder does not, and the consummation by such
Stockholder of the transactions contemplated hereby will not, violate, conflict
with or constitute a breach of, or a default under, the certificate of
incorporation or by-laws of such Stockholder or any or their comparable
governing instruments (if such Stockholder is not a natural person) or result in
a violation or breach of, or constitute (with or without due notice or lapse of
time or both) a default (or give rise to any right of termination, cancellation,
modification or acceleration) (whether after the giving of or the passage of
time of both) under any contract to which such Stockholder is a party or which
is binding on it or its assets and will not result in the creation of any lien
on, or security interest in, any of the assets on properties of such
Stockholder.

    2.  AGREEMENT TO DELIVER PROXY.

    Each of the Stockholders agrees to deliver to IMS on the date hereof an
irrevocable proxy substantially in the form attached hereto as EXHIBIT C to Vote
such Stockholder's Shares (a) in favor of approval and adoption of the Merger
Agreement, the Merger and the transactions contemplated thereby, the issuance of
TriZetto Common Stock to IMS stockholders pursuant to the Merger Agreement, the
TriZetto Charter Amendments and the Stock Option Plan at any meeting of the
stockholders of TriZetto at which such matters are considered and at every
adjournment or postponement thereof, (b) against any action or agreement that
would compete with, impede, interfere with or tend to discourage the
Transactions or inhibit the timely consummation of the Transactions,
(c) against any action or agreement that would result in a breach in any
material respect of any covenant, representation or warranty or any other
obligation of TriZetto under the Merger Agreement and (d) except for the
Transactions, against any merger, consolidation, business combination,
reorganization, recapitalization, liquidation or sale or transfer of any
material assets of TriZetto or the TriZetto Subsidiaries. The proxy delivered by
each of the Stockholders pursuant to this Section 2 shall be irrevocable during
the term of this Agreement to the extent permitted under Delaware law. For
purposes of this Agreement, "VOTE" shall include voting in person or by proxy in
favor of or against any action, otherwise consenting or withholding consent in
respect of any action (including, but not limited to, consenting in accordance
with Section 228 of the Delaware General Corporation Law) or taking other action
in favor of or against any action. "VOTING" shall have a correlative meaning.

    3.  NO VOTING TRUSTS.

    Each of the Stockholders agrees that they will not, nor will they permit any
entity or person under their control to, deposit any of its Shares or New Shares
(as defined in Section 6 hereof) in a Voting trust or subject any of their
Shares or New Shares to any arrangement with respect to the Voting of such
Shares or New Shares other than agreements entered into with IMS.

    4.  NO PROXY SOLICITATIONS.

    Each of the Stockholders agrees that such Stockholder will not, nor will
such Stockholder permit any entity or person under such Stockholder's control,
(a) to solicit proxies or become a "participant" in a "solicitation" (as such
terms are defined in Regulation 14A under the Exchange Act) in opposition to or
in competition with the consummation of the Transactions or otherwise encourage
or assist any party in taking or planning any action which would compete with,
impede, interfere with or tend to discourage the Transactions or inhibit the
timely consummation of the Transactions, (b) to directly or indirectly
encourage, initiate or cooperate in a stockholders' Vote or action by consent of
TriZetto's

                                     C-1-2
<PAGE>
stockholders in opposition to or in competition with the consummation of the
Transactions or (c) to become a member of a "group" (as such term is used in
Section 13(d) of the Exchange Act) with respect to any voting securities of
TriZetto for the purpose of opposing or competing with the consummation of the
Transactions.

    5.  TRANSFER AND ENCUMBRANCE.

    On or after the date hereof and during the term of this Agreement, each of
the Stockholders agrees not to transfer, sell, offer, exchange, pledge or
otherwise dispose of or encumber any of such Stockholder's Shares, Options or
New Shares.

    6.  ADDITIONAL PURCHASES.

    Each of the Stockholders agrees that such Stockholder will not purchase or
otherwise acquire beneficial ownership (as such term is used in Rule 13d-3 of
the Exchange Act) of any shares of TriZetto Common Stock after the execution of
this Agreement, including, but not limited to, acquisition by virtue of
exercising any Option ("NEW SHARES"), nor will any Stockholder voluntarily
acquire the right to Vote or share in the Voting of any shares of TriZetto
Common Stock other than the Shares, unless such Stockholder agrees to deliver to
IMS immediately after such purchase or acquisition an irrevocable proxy
substantially in the form attached hereto as EXHIBIT D with respect to such New
Shares. Each of the Stockholders also severally agrees that any New Shares
acquired or purchased by him or her shall be subject to the terms of this
Agreement to the same extent as if they constituted Shares.

    7.  SPECIFIC PERFORMANCE AND OPTION TO PURCHASE.

    Each party hereto acknowledges that it will be impossible to measure in
money the damage to the other party if a party hereto fails to comply with any
of the obligations imposed by this Agreement, that every such obligation is
material and that, in the event of any such failure, the other party will not
have an adequate remedy at law or damages. Accordingly, each party hereto agrees
that injunctive relief or other equitable remedy, in addition to remedies at law
or damages, is the appropriate remedy for any such failure and will not oppose
the granting of such relief on the basis that the other party has an adequate
remedy at law. Each party hereto agrees that it will not seek, and agrees to
waive any requirement for, the securing or posting of a bond in connection with
any other party's seeking or obtaining such equitable relief.

    8.  ENTIRE AGREEMENT; AMENDMENT; WAIVER.

    This Agreement (including the exhibits hereto) supersedes all prior
agreements, written or oral, among the parties hereto with respect to the
subject matter hereof and contains the entire agreement among the parties with
respect to the subject matter hereof. This Agreement may not be amended,
supplemented or modified, and no provisions hereof may be modified or waived,
except by an instrument in writing signed by all the parties hereto. No waiver
of any provisions hereof by any party shall be deemed a waiver of any other
provisions hereof by any such party, nor shall any such waiver be deemed a
continuing waiver of any provision hereof by such party.

    9.  NOTICES.

    All notices, requests, claims, demands or other communications hereunder
shall be in writing and shall be deemed given when delivered personally, upon
receipt of a transmission confirmation if sent by telecopy or like transmission
and on the next business day when sent by Federal Express, Express Mail

                                     C-1-3
<PAGE>
or other reputable overnight courier service to the parties at the following
addresses (or at such other address for a party as shall be specified by like
notice):

       If to IMS:

           IMS Health Incorporated
           200 Nyala Farms
           Westport, Connecticut 06880
           Attention: Chief Executive Officer
           Telecopy: (203) 222-4247

       With copies, which shall not constitute notice, to:

           IMS Health Incorporated
           200 Nyala Farms
           Westport, Connecticut 06880
           Attention: David Stevens
                    Jared Finkelstein

           Telecopy: (203) 222-4268

       and

           Sullivan & Cromwell
           125 Broad Street
           New York, New York 10004
           Attention: Alan J. Sinsheimer
                    Keith A. Pagnani

           Telecopy: (212) 558-3588

    If to a Stockholder, to the address or telecopy number set forth for such
Stockholder on the signature page hereof:

       With a copy to:

           The TriZetto Group, Inc.
           567 San Nicolas Drive
           Newport Beach, California 92660
           Attention: General Counsel
           Telecopy: (949) 219-2197

or to such other Persons on addresses as may be designated in writing by the
party to receive such notice as provided above.

    10.  MISCELLANEOUS.

        (a)  GOVERNING LAW.  THIS AGREEMENT AND THE RIGHTS AND OBLIGATIONS OF
    THE PARTIES HERETO SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH AND
    SUBJECT TO THE LAWS OF THE STATE OF DELAWARE, WITHOUT REFERENCE TO CONFLICTS
    OF LAWS PRINCIPLES.

        (b)  VENUE; WAIVER OF JURY TRIAL.  The parties hereby irrevocably submit
    to the jurisdiction of the courts of the State of Delaware and the Federal
    courts of the United States of America located in the State of Delaware
    solely in respect of the interpretation and enforcement of the provisions of
    this Agreement and of the documents governed by Delaware law referred to in
    this Agreement, and in respect of the transactions contemplated hereby, and
    hereby waive, and agree not to assert, as a defense in any action, suit or
    proceeding for the interpretation or enforcement hereof or of any such
    document, that it is not subject thereto or that such action, suit

                                     C-1-4
<PAGE>
    or proceeding may not be brought or is not maintainable in said courts or
    that the venue thereof may not be appropriate or that this Agreement or any
    such document may not be enforced in or by such courts, and the parties
    hereto irrevocably agree that all claims with respect to such action or
    proceeding shall be heard and determined in such a Delaware State or Federal
    court. The parties hereby consent to and grant any such court jurisdiction
    over the person of such parties and over the subject matter of such dispute
    and agree that mailing of process or other papers in connection with any
    such action or proceeding in the manner provided in Section 9 of this
    Agreement or in such other manner as may be permitted by law shall be valid
    and sufficient service thereof.

        EACH PARTY ACKNOWLEDGES AND AGREES THAT ANY CONTROVERSY WHICH MAY ARISE
    UNDER THIS AGREEMENT IS LIKELY TO INVOLVE COMPLICATED AND DIFFICULT ISSUES,
    AND THEREFORE EACH SUCH PARTY HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVES
    ANY RIGHT SUCH PARTY MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY
    LITIGATION DIRECTLY OR INDIRECTLY ARISING OUT OF OR RELATING TO THIS
    AGREEMENT, OR THE TRANSACTIONS CONTEMPLATED BY THIS AGREEMENT. EACH PARTY
    CERTIFIES AND ACKNOWLEDGES THAT (i) NO REPRESENTATIVE, AGENT OR ATTORNEY OF
    ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER
    PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING
    WAIVER, (ii) EACH PARTY UNDERSTANDS AND HAS CONSIDERED THE IMPLICATIONS OF
    THIS WAIVER, (iii) EACH PARTY MAKES THIS WAIVER VOLUNTARILY, AND (iv) EACH
    PARTY HAS BEEN INDUCED TO ENTER INTO THIS AGREEMENT BY, AMONG OTHER THINGS,
    THE MUTUAL WAIVERS AND CERTIFICATIONS IN THIS SECTION 10 (b).

        (c)  SEVERABILITY.  In the event that any provision of the Agreement is
    held to be illegal, invalid or unenforceable in a final, unappealable order
    or judgment (each such provision, an "INVALID PROVISION"), then such
    provision shall be severed from this Agreement and shall be inoperative and
    the parties promptly shall negotiate in good faith a lawful, valid and
    enforceable provision that is as similar to the invalid provision as may be
    possible and that preserves the original intentions and economic positions
    of the parties as set forth herein to the maximum extent feasible, while the
    remaining provisions of this Agreement shall remain binding on the parties
    hereto. Without limiting the generality of the foregoing sentence, in the
    event a change in any applicable law, rule or regulation makes it unlawful
    for a party to comply with any of its obligations hereunder, the parties
    shall negotiate in good faith a modification to such obligation to the
    extent necessary to comply with such law, rule or regulation that is as
    similar in terms to the original obligation as may be possible while
    preserving the original intentions and economic positions of the parties as
    set forth herein to the maximum extent feasible.

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

        (e)  TERMINATION.  This Agreement shall terminate upon the earliest to
    occur of (i) the Closing, (ii) the termination of the Merger Agreement and
    (iii) the date specified in a written agreement duly executed and delivered
    by IMS and each of the Stockholders.

        (f)  FURTHER ASSURANCES.  Each party hereto shall execute and deliver
    such additional instruments and other documents and shall take such further
    actions as may be necessary or desirable to effectuate, carry out and comply
    with all of the terms of this Agreement and the transactions contemplated
    hereby.

                                     C-1-5
<PAGE>
        (g)  HEADINGS; RECITALS.  All Section headings and the recitals herein
    are for convenience of reference only and are not part of this Agreement,
    and no construction or reference shall be derived therefrom.

        (h)  THIRD PARTY BENEFICIARIES.  NOTHING IN THIS AGREEMENT, EXPRESS OR
    IMPLIED, IS INTENDED TO CONFER UPON ANY THIRD PARTY ANY RIGHTS OR REMEDIES
    OF ANY NATURE WHATSOEVER UNDER OR BY REASON OF THIS AGREEMENT.

                                     C-1-6
<PAGE>
    IN WITNESS WHEREOF, the parties hereto have executed and delivered this
Agreement as of the date first written above.

<TABLE>
<S>                                                    <C>  <C>
                                                       IMS HEALTH INCORPORATED

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

                                                       STOCKHOLDER:

                                                       By:
                                                            -----------------------------------------
                                                            Name:
                                                            Title:
                                                            Address:
                                                            Telecopy:
</TABLE>

                                     C-1-7
<PAGE>
                                                                       EXHIBIT A

                                  STOCKHOLDERS

<TABLE>
<CAPTION>
NAME                                                                          NUMBER OF SHARES
----                                                                          ----------------
<S>                                                       <C>
</TABLE>

                                     C-1-8
<PAGE>
                                                                       EXHIBIT B

                              STOCKHOLDERS OPTIONS

<TABLE>
<CAPTION>
NAME                                                              OPTIONS
----                                                              -------
<S>                                            <C>
</TABLE>

                                     C-1-9
<PAGE>
                                                                       EXHIBIT C

                                 FORM OF PROXY

    The undersigned, for consideration received, hereby appoints Victoria Fash
or another representative of IMS Health Incorporated, a Delaware corporation
"IMS"), designated by her and each of them my proxies, with full power of
substitution and resubstitution, (i) to vote all shares of Common Stock, par
value $0.001 per share, of The TriZetto Group, Inc., a Delaware corporation
("TRIZETTO"), owned by the undersigned (the "SHARES") as of the date hereof at
any meetings of stockholders of TriZetto after the date hereof and at any
adjournment or postponement thereof (each, a "TRIZETTO MEETING") FOR approval
and adoption of (a) the Agreement and Plan of Reorganization, dated as of March
  , 2000 (the "MERGER AGREEMENT"), by and between TriZetto and IMS, and the
transactions contemplated thereby, (b) the issuance of TriZetto Common Stock to
IMS stockholders pursuant to the Merger Agreement, (c) certain amendments to
TriZetto's certificate of incorporation contemplated by the Merger Agreement,
and (d) a new TriZetto stock option plan in such form and with such number of
available options issuable thereunder as shall be agreed upon by IMS and
TriZetto (collectively, the "TRANSACTIONS"), and AGAINST (a) any action or
agreement that would compete with, impede, interfere with or tend to discourage
the Transactions or inhibit the timely consummation of the Transactions,
(b) any action or agreement that would result in a breach in any material
respect of any covenant, representation or warranty or any other obligation of
TriZetto under the Merger Agreement, or (c) except for the Transactions, any
merger, consolidation, business combination, reorganization, recapitalization,
liquidation or sale or transfer of any material assets of TriZetto or its
subsidiaries, and (ii) to withhold consents with respect to such Shares for
(a) any action or agreement that would compete with, impede, interfere with or
tend to discourage the Transactions or inhibit the timely consummation of the
Transactions, (b) any action or agreement that would result in a breach in any
material respect of any covenant, representation or warranty or any other
obligation of TriZetto under the Merger Agreement, or (c) except for the
Transactions, any merger, consolidation, business combination, reorganization,
recapitalization, liquidation or sale or transfer of any material assets of
TriZetto or its subsidiaries. This proxy is coupled with an interest, revokes
all prior proxies granted by the undersigned and is irrevocable until such time
as the Voting Agreement, dated as of March   , 2000, among certain stockholders
of TriZetto, including the undersigned, and IMS, terminates in accordance with
its terms, at which time this proxy shall expire.

                                          Dated March   , 2000
  ------------------------------------------------------------------------------
                                            (Signature of Stockholder)

                                     C-1-10
<PAGE>
                                                                       EXHIBIT D

                                 FORM OF PROXY

    The undersigned, for consideration received, hereby appoints Victoria Fash
or another representative of IMS Health Incorporated, a Delaware corporation
("IMS"), designated by her and each of them my proxies, with full power of
substitution and resubstitution, (i) to vote the             shares of Common
Stock, par value $0.001 per share (the "NEW SHARES"), of The TriZetto
Group, Inc., a Delaware corporation ("TRIZETTO"), purchased or otherwise
acquired by the undersigned, or for which the undersigned has voluntarily
acquired the right to vote or share in the voting of such shares, since the
execution of the Voting Agreement, dated as of March   , 2000 (the "VOTING
AGREEMENT"), by and among certain stockholders of TriZetto, including the
undersigned, and IMS, at any meetings of stockholders of TriZetto after the date
hereof and at any adjournment or postponement thereof (each, a "TRIZETTO
MEETING") FOR approval and adoption of (a) the Agreement and Plan of
Reorganization, dated as of March   , 2000 (the "MERGER AGREEMENT"), by and
between TriZetto and IMS, and the transactions contemplated thereby, (b) the
issuance of TriZetto Common Stock to IMS stockholders pursuant to the Merger
Agreement, (c) certain amendments to TriZetto's certificate of incorporation
contemplated by the Merger Agreement and (d) a new TriZetto stock option plan in
such form and with such number of available options issuable thereunder as shall
be agreed upon by IMS and TriZetto (collectively, the "TRANSACTIONS"), and
AGAINST (a) any action or agreement that would compete with, impede, interfere
with or tend to discourage the Transactions or inhibit the timely consummation
of the Transactions, (b) any action or agreement that would result in a breach
in any material respect of any covenant, representation or warranty or any other
obligation of TriZetto under the Merger Agreement, or (c) except for the
Transactions, any merger, consolidation, business combination, reorganization,
recapitalization, liquidation or sale or transfer of any material assets of
TriZetto or its subsidiaries, and (ii) to withhold consents with respect to such
New Shares for (a) any action or agreement that would compete with, impede,
interfere with or tend to discourage the Transactions or inhibit the timely
consummation of the Transactions, (b) any action or agreement that would result
in a breach in any material respect of any covenant, representation or warranty
or any other obligation of TriZetto under the Merger Agreement, or (c) except
for the Transactions, any merger, consolidation, business combination,
reorganization, recapitalization, liquidation or sale or transfer of any
material assets of TriZetto or its subsidiaries. This proxy is coupled with an
interest and is irrevocable until such time as the Voting Agreement terminates
in accordance with its terms, at which time this proxy shall expire.

                                          Dated             , 2000
  ------------------------------------------------------------------------------
                                            (Signature of Stockholder)

                                     C-1-11
<PAGE>
                                                                    APPENDIX C-2

                                VOTING AGREEMENT

    VOTING AGREEMENT (the "AGREEMENT"), dated as of March 28, 2000, among the
undersigned stockholders (the "STOCKHOLDERS") of The TriZetto Group, Inc., a
Delaware corporation ("TRIZETTO"), and IMS Health Incorporated, a Delaware
corporation ("IMS"). Except as otherwise provided herein, capitalized terms that
are used but not otherwise defined herein shall have the respective meanings
assigned to such terms in the Merger Agreement (as defined below). In the case
of Fidelity Ventures, Limited, Fidelity Investors Limited Partnership and
Fidelity Investors II Limited Partnership (collectively, the "Fidelity
Entities"), all references to "Stockholder" shall include only the Fidelity
Entities and shall not include FMR Corp. and its other subsidiaries and
affiliates; Fidelity International Limited and its subsidiaries and affiliates;
directors and officers of FMR Corp. and Fidelity International Limited and their
respective subsidiaries and affiliates; Edward C. Johnson 3d and members of his
family and trusts for their benefit; and any accounts over which FMR Corp. or
Fidelity International Limited or their respective subsidiaries and affiliates
have investment management or advisory responsibilities, including any of the
Fidelity Investments mutual funds.

    WHEREAS, contemporaneously with the execution and delivery of this
Agreement, TriZetto and IMS have entered into an Agreement and Plan of
Reorganization (the "MERGER AGREEMENT"), providing for, among other things, the
merger of IMS with and into TriZetto, the issuance of shares of TriZetto Common
Stock to IMS stockholders in connection with the Merger, certain amendments to
TriZetto's certificate of incorporation as set forth in the Merger Agreement
(the "TRIZETTO CHARTER AMENDMENTS"), and a new TriZetto stock option plan (the
"STOCK OPTION PLAN") in such form and with such number of available options
issuable thereunder as shall be agreed upon by TriZetto and IMS (collectively,
the "TRANSACTIONS"), upon the terms and subject to the conditions set forth in
the Merger Agreement, and setting forth certain representations, warranties,
covenants and agreements of the parties thereto in connection with the
Transactions;

    WHEREAS, the Merger Agreement contemplates the execution and delivery of
this Agreement;

    WHEREAS, in order to induce IMS to enter into the Merger Agreement, the
Stockholders wish to agree (i) to deliver to IMS an irrevocable proxy to Vote
(as defined in Section 2 hereof) the Shares (as defined in Section 1 hereof) and
any other shares of capital stock of TriZetto acquired hereafter and prior to
the termination of this Agreement so as to approve and adopt (a) the Merger
Agreement and the transactions contemplated thereby, (b) the issuance of
TriZetto Common Stock to IMS stockholders in connection with the Merger,
(c) the TriZetto Charter Amendments and (d) the Stock Option Plan, and (ii) not
to transfer or otherwise dispose of any of the Shares, or any other shares of
capital stock of TriZetto acquired hereafter and prior to the termination of
this Agreement except in accordance with this Agreement.

    NOW, THEREFORE, for good and valuable consideration, the receipt,
sufficiency and adequacy of which are hereby acknowledged, the parties hereto
agree as follows:

    1.  REPRESENTATIONS OF STOCKHOLDERS.

    Each of the Stockholders represents and warrants to IMS that (a) such
Stockholder lawfully owns beneficially (as such term is defined in Rule 13d-3 of
the Exchange Act) and of record each of the shares of Common Stock, par value
$0.001 per share, of TriZetto (the "TRIZETTO COMMON STOCK"), set forth opposite
such Stockholder's name on EXHIBIT A hereto (such Stockholder's "SHARES") free
and clear of all liens, claims, charges, security interests or other
encumbrances and, except for this Agreement and the Merger Agreement, there are
no options, warrants or other rights, agreements, arrangements or commitments of
any character to which such Stockholder is a party relating to the pledge,
disposition or Voting of any shares of capital stock of TriZetto and there are
no Voting trusts

                                     C-2-1
<PAGE>
or Voting agreements with respect to such Shares, (b) such Stockholder does not
beneficially own (as such term is used in Rule 13d-3 of the Exchange Act) any
shares of TriZetto Common Stock other than such Shares and does not have any
options, warrants or other rights to acquire any additional shares of capital
stock of TriZetto or any security exercisable for or convertible into shares of
capital stock of TriZetto other than those options, warrants or other rights set
forth opposite such Stockholder's name on EXHIBIT B hereto (such Stockholder's
"OPTIONS") and each Stockholder represents and warrants that such Stockholder
shall not exercise any such Options prior to the termination of this Agreement
except in accordance with Section 6 of this Agreement, (c) such Stockholder has
full power and authority and has taken all actions necessary to enter into,
execute and deliver this Agreement and to perform fully such Stockholder's
obligations hereunder and this Agreement has been duly executed and delivered
and constitutes the legal, valid and binding obligation of such Stockholder
enforceable against such Stockholder in accordance with its terms, subject to
the Bankruptcy and Equity Exception, (d) other than filings under the Exchange
Act, no notices, reports or other filings are required to be made by such
Stockholder with, nor are any consents, registrations, approvals, permits or
authorizations required to be obtained by such Stockholder from, any
Governmental Entity, in connection with the execution and delivery of this
Agreement by such Stockholder, and (e) the execution, delivery and performance
of this Agreement by such Stockholder does not, and the consummation by such
Stockholder of the transactions contemplated hereby will not, violate, conflict
with or constitute a breach of, or a default under, the certificate of
incorporation or by-laws of such Stockholder or any or their comparable
governing instruments (if such Stockholder is not a natural person) or result in
a violation or breach of, or constitute (with or without due notice or lapse of
time or both) a default (or give rise to any right of termination, cancellation,
modification or acceleration) (whether after the giving of or the passage of
time of both) under any contract to which such Stockholder is a party or which
is binding on it or its assets and will not result in the creation of any lien
on, or security interest in, any of the assets on properties of such
Stockholder.

    2.  AGREEMENT TO DELIVER PROXY.

    Each of the Stockholders agrees to deliver to IMS on the date hereof an
irrevocable proxy substantially in the form attached hereto as EXHIBIT C to Vote
such Stockholder's Shares (a) in favor of approval and adoption of the Merger
Agreement, the Merger and the transactions contemplated thereby, the issuance of
TriZetto Common Stock to IMS stockholders pursuant to the Merger Agreement, the
TriZetto Charter Amendments and the Stock Option Plan at any meeting of the
stockholders of TriZetto at which such matters are considered and at every
adjournment or postponement thereof, (b) against any action or agreement that
would compete with, impede, interfere with or tend to discourage the
Transactions or inhibit the timely consummation of the Transactions,
(c) against any action or agreement that would result in a breach in any
material respect of any covenant, representation or warranty or any other
obligation of TriZetto under the Merger Agreement and (d) except for the
Transactions, against any merger, consolidation, business combination,
reorganization, recapitalization, liquidation or sale or transfer of any
material assets of TriZetto or the TriZetto Subsidiaries. The proxy delivered by
each of the Stockholders pursuant to this Section 2 shall be irrevocable during
the term of this Agreement to the extent permitted under Delaware law. For
purposes of this Agreement, "VOTE" shall include voting in person or by proxy in
favor of or against any action, otherwise consenting or withholding consent in
respect of any action (including, but not limited to, consenting in accordance
with Section 228 of the Delaware General Corporation Law) or taking other action
in favor of or against any action. "VOTING" shall have a correlative meaning.

    3.  NO VOTING TRUSTS.

    Each of the Stockholders agrees that they will not, nor will they permit any
entity or person under their control to, deposit any of its Shares or New Shares
(as defined in Section 6 hereof) in a Voting trust or subject any of their
Shares or New Shares to any arrangement with respect to the Voting of such
Shares or New Shares other than agreements entered into with IMS.

                                     C-2-2
<PAGE>
    4.  NO PROXY SOLICITATIONS.

    Each of the Stockholders agrees that such Stockholder will not, nor will
such Stockholder permit any entity or person under such Stockholder's control,
(a) to solicit proxies or become a "participant" in a "solicitation" (as such
terms are defined in Regulation 14A under the Exchange Act) in opposition to or
in competition with the consummation of the Transactions or otherwise encourage
or assist any party in taking or planning any action which would compete with,
impede, interfere with or tend to discourage the Transactions or inhibit the
timely consummation of the Transactions, (b) to directly or indirectly
encourage, initiate or cooperate in a stockholders' Vote or action by consent of
TriZetto's stockholders in opposition to or in competition with the consummation
of the Transactions or (c) to become a member of a "group" (as such term is used
in Section 13(d) of the Exchange Act) with respect to any voting securities of
TriZetto for the purpose of opposing or competing with the consummation of the
Transactions.

    5.  TRANSFER AND ENCUMBRANCE.

    On or after the date hereof and during the term of this Agreement, each of
the Stockholders agrees not to transfer, sell, offer, exchange, pledge or
otherwise dispose of or encumber any of such Stockholder's Shares, Options or
New Shares; PROVIDED, that a Stockholder may transfer such Stockholder's Shares
or New Shares if, prior to such transfer, the transferee of such Shares or New
Shares, as applicable, shall have executed for the benefit of IMS, a legally
binding instrument pursuant to which such transferee agrees to assume all of
such Stockholder's obligations under this Agreement, including the delivery of
an irrevocable proxy to IMS substantially in the form attached hereto as
EXHIBIT C with respect to such transferred Shares or New Shares, as applicable.

    6.  ADDITIONAL PURCHASES.

    Each of the Stockholders agrees that such Stockholder will not purchase or
otherwise acquire beneficial ownership (as such term is used in Rule 13d-3 of
the Exchange Act) of any shares of TriZetto Common Stock after the execution of
this Agreement, including, but not limited to, acquisition by virtue of
exercising any Option ("NEW SHARES"), nor will any Stockholder voluntarily
acquire the right to Vote or share in the Voting of any shares of TriZetto
Common Stock other than the Shares, unless such Stockholder agrees to deliver to
IMS immediately after such purchase or acquisition an irrevocable proxy
substantially in the form attached hereto as EXHIBIT D with respect to such New
Shares. Each of the Stockholders also severally agrees that any New Shares
acquired or purchased by him or her shall be subject to the terms of this
Agreement to the same extent as if they constituted Shares.

    7.  SPECIFIC PERFORMANCE AND OPTION TO PURCHASE.

    Each party hereto acknowledges that it will be impossible to measure in
money the damage to the other party if a party hereto fails to comply with any
of the obligations imposed by this Agreement, that every such obligation is
material and that, in the event of any such failure, the other party will not
have an adequate remedy at law or damages. Accordingly, each party hereto agrees
that injunctive relief or other equitable remedy, in addition to remedies at law
or damages, is the appropriate remedy for any such failure and will not oppose
the granting of such relief on the basis that the other party has an adequate
remedy at law. Each party hereto agrees that it will not seek, and agrees to
waive any requirement for, the securing or posting of a bond in connection with
any other party's seeking or obtaining such equitable relief.

    8.  ENTIRE AGREEMENT; AMENDMENT; WAIVER.

    This Agreement (including the exhibits hereto) supersedes all prior
agreements, written or oral, among the parties hereto with respect to the
subject matter hereof and contains the entire agreement among the parties with
respect to the subject matter hereof. This Agreement may not be amended,

                                     C-2-3
<PAGE>
supplemented or modified, and no provisions hereof may be modified or waived,
except by an instrument in writing signed by all the parties hereto. No waiver
of any provisions hereof by any party shall be deemed a waiver of any other
provisions hereof by any such party, nor shall any such waiver be deemed a
continuing waiver of any provision hereof by such party.

    9.  NOTICES.

    All notices, requests, claims, demands or other communications hereunder
shall be in writing and shall be deemed given when delivered personally, upon
receipt of a transmission confirmation if sent by telecopy or like transmission
and on the next business day when sent by Federal Express, Express Mail or other
reputable overnight courier service to the parties at the following addresses
(or at such other address for a party as shall be specified by like notice):

       If to IMS:

           IMS Health Incorporated
           200 Nyala Farms
           Westport, Connecticut 06880
           Attention: Chief Executive Officer
           Telecopy: (203)222-4247

       With copies, which shall not constitute notice, to:

           IMS Health Incorporated
           200 Nyala Farms
           Westport, Connecticut 06880
           Attention: David Stevens
                    Jared Finkelstein

           Telecopy: (203)222-4268

       and

           Sullivan & Cromwell
           125 Broad Street
           New York, New York 10004
           Attention: Alan J. Sinsheimer
                    Keith A. Pagnani

           Telecopy: (212) 558-3588

    If to a Stockholder, to the address or telecopy number set forth for such
Stockholder on the signature page hereof:

       With a copy to:

           The TriZetto Group, Inc.
           567 San Nicolas Drive
           Newport Beach, California 92660
           Attention: General Counsel
           Telecopy: (949) 219-2197

or to such other Persons on addresses as may be designated in writing by the
party to receive such notice as provided above.

    10.  MISCELLANEOUS.

        (a)  GOVERNING LAW.  THIS AGREEMENT AND THE RIGHTS AND OBLIGATIONS OF
    THE PARTIES HERETO SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE

                                     C-2-4
<PAGE>
    WITH AND SUBJECT TO THE LAWS OF THE STATE OF DELAWARE, WITHOUT REFERENCE TO
    CONFLICTS OF LAWS PRINCIPLES.

        (b)  VENUE; WAIVER OF JURY TRIAL.  The parties hereby irrevocably submit
    to the jurisdiction of the courts of the State of Delaware and the Federal
    courts of the United States of America located in the State of Delaware
    solely in respect of the interpretation and enforcement of the provisions of
    this Agreement and of the documents governed by Delaware law referred to in
    this Agreement, and in respect of the transactions contemplated hereby, and
    hereby waive, and agree not to assert, as a defense in any action, suit or
    proceeding for the interpretation or enforcement hereof or of any such
    document, that it is not subject thereto or that such action, suit or
    proceeding may not be brought or is not maintainable in said courts or that
    the venue thereof may not be appropriate or that this Agreement or any such
    document may not be enforced in or by such courts, and the parties hereto
    irrevocably agree that all claims with respect to such action or proceeding
    shall be heard and determined in such a Delaware State or Federal court. The
    parties hereby consent to and grant any such court jurisdiction over the
    person of such parties and over the subject matter of such dispute and agree
    that mailing of process or other papers in connection with any such action
    or proceeding in the manner provided in Section 9 of this Agreement or in
    such other manner as may be permitted by law shall be valid and sufficient
    service thereof.

        EACH PARTY ACKNOWLEDGES AND AGREES THAT ANY CONTROVERSY WHICH MAY ARISE
    UNDER THIS AGREEMENT IS LIKELY TO INVOLVE COMPLICATED AND DIFFICULT ISSUES,
    AND THEREFORE EACH SUCH PARTY HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVES
    ANY RIGHT SUCH PARTY MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY
    LITIGATION DIRECTLY OR INDIRECTLY ARISING OUT OF OR RELATING TO THIS
    AGREEMENT, OR THE TRANSACTIONS CONTEMPLATED BY THIS AGREEMENT. EACH PARTY
    CERTIFIES AND ACKNOWLEDGES THAT (i) NO REPRESENTATIVE, AGENT OR ATTORNEY OF
    ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER
    PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING
    WAIVER, (ii) EACH PARTY UNDERSTANDS AND HAS CONSIDERED THE IMPLICATIONS OF
    THIS WAIVER, (iii) EACH PARTY MAKES THIS WAIVER VOLUNTARILY, AND (iv) EACH
    PARTY HAS BEEN INDUCED TO ENTER INTO THIS AGREEMENT BY, AMONG OTHER THINGS,
    THE MUTUAL WAIVERS AND CERTIFICATIONS IN THIS SECTION 10 (b).

        (c)  SEVERABILITY.  In the event that any provision of the Agreement is
    held to be illegal, invalid or unenforceable in a final, unappealable order
    or judgment (each such provision, an "INVALID PROVISION"), then such
    provision shall be severed from this Agreement and shall be inoperative and
    the parties promptly shall negotiate in good faith a lawful, valid and
    enforceable provision that is as similar to the invalid provision as may be
    possible and that preserves the original intentions and economic positions
    of the parties as set forth herein to the maximum extent feasible, while the
    remaining provisions of this Agreement shall remain binding on the parties
    hereto. Without limiting the generality of the foregoing sentence, in the
    event a change in any applicable law, rule or regulation makes it unlawful
    for a party to comply with any of its obligations hereunder, the parties
    shall negotiate in good faith a modification to such obligation to the
    extent necessary to comply with such law, rule or regulation that is as
    similar in terms to the original obligation as may be possible while
    preserving the original intentions and economic positions of the parties as
    set forth herein to the maximum extent feasible.

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

                                     C-2-5
<PAGE>
        (e)  TERMINATION.  This Agreement shall terminate upon the earliest to
    occur of (i) the Closing, (ii) the termination of the Merger Agreement and
    (iii) the date specified in a written agreement duly executed and delivered
    by IMS and each of the Stockholders, PROVIDED, however, that with respect to
    the Fidelity Entities this Agreement shall terminate upon the earliest to
    occur of (i) the Closing, (ii) the termination of the Merger Agreement,
    (iii) the date 180 days after the date of this Agreement, and (iv) the date
    specified in a written agreement duly executed and delivered by IMS and the
    Fidelity Entities.

        (f)  FURTHER ASSURANCES.  Each party hereto shall execute and deliver
    such additional instruments and other documents and shall take such further
    actions as may be necessary or desirable to effectuate, carry out and comply
    with all of the terms of this Agreement and the transactions contemplated
    hereby.

        (g)  HEADINGS; RECITALS.  All Section headings and the recitals herein
    are for convenience of reference only and are not part of this Agreement,
    and no construction or reference shall be derived therefrom.

        (h)  THIRD PARTY BENEFICIARIES.  NOTHING IN THIS AGREEMENT, EXPRESS OR
    IMPLIED, IS INTENDED TO CONFER UPON ANY THIRD PARTY ANY RIGHTS OR REMEDIES
    OF ANY NATURE WHATSOEVER UNDER OR BY REASON OF THIS AGREEMENT.

                                     C-2-6
<PAGE>
    IN WITNESS WHEREOF, the parties hereto have executed and delivered this
Agreement as of the date first written above.

<TABLE>
<S>                                                    <C>  <C>
                                                       IMS HEALTH INCORPORATED

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

                                                       STOCKHOLDER:

                                                       By:
                                                            -----------------------------------------
                                                            Name:
                                                            Title:
                                                            Address:
                                                            Telecopy:
</TABLE>

                                     C-2-7
<PAGE>
                                                                       EXHIBIT A

                                  STOCKHOLDERS

<TABLE>
<CAPTION>
NAME                                                       NUMBER OF SHARES
----                                                       -----------------
<S>                                                        <C>
</TABLE>

                                     C-2-8
<PAGE>
                                                                       EXHIBIT B

                              STOCKHOLDERS OPTIONS

<TABLE>
<CAPTION>
NAME                                                          OPTIONS
----                                                          --------
<S>                                                           <C>
</TABLE>

                                     C-2-9
<PAGE>
                                                                       EXHIBIT C

                                 FORM OF PROXY

    The undersigned, for consideration received, hereby appoints Victoria Fash
or another representative of IMS Health Incorporated, a Delaware corporation
("IMS"), designated by her and each of them my proxies, with full power of
substitution and resubstitution, (i) to vote all shares of Common Stock, par
value $0.001 per share, of The TriZetto Group, Inc., a Delaware corporation
("TRIZETTO"), owned by the undersigned (the "SHARES") as of the date hereof at
any meetings of stockholders of TriZetto after the date hereof and at any
adjournment or postponement thereof (each, a "TRIZETTO MEETING") FOR approval
and adoption of (a) the Agreement and Plan of Reorganization, dated as of March
  , 2000 (the "MERGER AGREEMENT"), by and between TriZetto and IMS, and the
transactions contemplated thereby, (b) the issuance of TriZetto Common Stock to
IMS stockholders pursuant to the Merger Agreement, (c) certain amendments to
TriZetto's certificate of incorporation contemplated by the Merger Agreement,
and (d) a new TriZetto stock option plan in such form and with such number of
available options issuable thereunder as shall be agreed upon by IMS and
TriZetto (collectively, the "TRANSACTIONS"), and AGAINST (a) any action or
agreement that would compete with, impede, interfere with or tend to discourage
the Transactions or inhibit the timely consummation of the Transactions,
(b) any action or agreement that would result in a breach in any material
respect of any covenant, representation or warranty or any other obligation of
TriZetto under the Merger Agreement, or (c) except for the Transactions, any
merger, consolidation, business combination, reorganization, recapitalization,
liquidation or sale or transfer of any material assets of TriZetto or its
subsidiaries, and (ii) to withhold consents with respect to such Shares for
(a) any action or agreement that would compete with, impede, interfere with or
tend to discourage the Transactions or inhibit the timely consummation of the
Transactions, (b) any action or agreement that would result in a breach in any
material respect of any covenant, representation or warranty or any other
obligation of TriZetto under the Merger Agreement, or (c) except for the
Transactions, any merger, consolidation, business combination, reorganization,
recapitalization, liquidation or sale or transfer of any material assets of
TriZetto or its subsidiaries. This proxy is coupled with an interest, revokes
all prior proxies granted by the undersigned and is irrevocable until such time
as the Voting Agreement, dated as of March   , 2000, among certain stockholders
of TriZetto, including the undersigned, and IMS, terminates in accordance with
its terms, at which time this proxy shall expire.

                                          Dated March   , 2000
                                          --------------------------------------
                                          (Signature of Stockholder)

                                     C-2-10
<PAGE>
                                                                       EXHIBIT D

                                 FORM OF PROXY

    The undersigned, for consideration received, hereby appoints Victoria Fash
or another representative of IMS Health Incorporated, a Delaware corporation
("IMS"), designated by her and each of them my proxies, with full power of
substitution and resubstitution, (i) to vote the             shares of Common
Stock, par value $0.001 per share (the "NEW SHARES"), of The TriZetto
Group, Inc., a Delaware corporation ("TRIZETTO"), purchased or otherwise
acquired by the undersigned, or for which the undersigned has voluntarily
acquired the right to vote or share in the voting of such shares, since the
execution of the Voting Agreement, dated as of March   , 2000 (the "VOTING
AGREEMENT"), by and among certain stockholders of TriZetto, including the
undersigned, and IMS, at any meetings of stockholders of TriZetto after the date
hereof and at any adjournment or postponement thereof (each, a "TRIZETTO
MEETING") FOR approval and adoption of (a) the Agreement and Plan of
Reorganization, dated as of March   , 2000 (the "MERGER AGREEMENT"), by and
between TriZetto and IMS, and the transactions contemplated thereby, (b) the
issuance of TriZetto Common Stock to IMS stockholders pursuant to the Merger
Agreement, (c) certain amendments to TriZetto's certificate of incorporation
contemplated by the Merger Agreement and (d) a new TriZetto stock option plan in
such form and with such number of available options issuable thereunder as shall
be agreed upon by IMS and TriZetto (collectively, the "TRANSACTIONS"), and
AGAINST (a) any action or agreement that would compete with, impede, interfere
with or tend to discourage the Transactions or inhibit the timely consummation
of the Transactions, (b) any action or agreement that would result in a breach
in any material respect of any covenant, representation or warranty or any other
obligation of TriZetto under the Merger Agreement, or (c) except for the
Transactions, any merger, consolidation, business combination, reorganization,
recapitalization, liquidation or sale or transfer of any material assets of
TriZetto or its subsidiaries, and (ii) to withhold consents with respect to such
New Shares for (a) any action or agreement that would compete with, impede,
interfere with or tend to discourage the Transactions or inhibit the timely
consummation of the Transactions, (b) any action or agreement that would result
in a breach in any material respect of any covenant, representation or warranty
or any other obligation of TriZetto under the Merger Agreement, or (c) except
for the Transactions, any merger, consolidation, business combination,
reorganization, recapitalization, liquidation or sale or transfer of any
material assets of TriZetto or its subsidiaries. This proxy is coupled with an
interest and is irrevocable until such time as the Voting Agreement terminates
in accordance with its terms, at which time this proxy shall expire.

                                          Dated             , 200
                                          --------------------------------------
                                          (Signature of Stockholder)

                                     C-2-11
<PAGE>
                                                                    APPENDIX C-3

                                VOTING AGREEMENT

    VOTING AGREEMENT (the "AGREEMENT"), dated as of March 28, 2000, among the
undersigned stockholders (the "STOCKHOLDERS") of The TriZetto Group, Inc., a
Delaware corporation ("TRIZETTO"), and IMS Health Incorporated, a Delaware
corporation ("IMS"). Except as otherwise provided herein, capitalized terms that
are used but not otherwise defined herein shall have the respective meanings
assigned to such terms in the Merger Agreement (as defined below).

    WHEREAS, contemporaneously with the execution and delivery of this
Agreement, TriZetto and IMS have entered into an Agreement and Plan of
Reorganization (the "MERGER AGREEMENT"), providing for, among other things, the
merger of IMS with and into TriZetto, the issuance of shares of TriZetto Common
Stock to IMS stockholders in connection with the Merger, certain amendments to
TriZetto's certificate of incorporation as set forth in the Merger Agreement
(the "TRIZETTO CHARTER AMENDMENTS"), and a new TriZetto stock option plan (the
"STOCK OPTION PLAN") in such form and with such number of available options
issuable thereunder as shall be agreed upon by TriZetto and IMS (collectively,
the "TRANSACTIONS"), upon the terms and subject to the conditions set forth in
the Merger Agreement, and setting forth certain representations, warranties,
covenants and agreements of the parties thereto in connection with the
Transactions;

    WHEREAS, the Merger Agreement contemplates the execution and delivery of
this Agreement;

    WHEREAS, in order to induce IMS to enter into the Merger Agreement, the
Stockholders wish to agree (i) to deliver to IMS an irrevocable proxy to Vote
(as defined in Section 2 hereof) the Shares (as defined in Section 1 hereof) and
any other shares of capital stock of TriZetto acquired hereafter and prior to
the termination of this Agreement so as to approve and adopt (a) the Merger
Agreement and the transactions contemplated thereby, (b) the issuance of
TriZetto Common Stock to IMS stockholders in connection with the Merger,
(c) the TriZetto Charter Amendments and (d) the Stock Option Plan, and (ii) not
to transfer or otherwise dispose of any of the Shares, or any other shares of
capital stock of TriZetto acquired hereafter and prior to the termination of
this Agreement except in accordance with this Agreement.

    NOW, THEREFORE, for good and valuable consideration, the receipt,
sufficiency and adequacy of which are hereby acknowledged, the parties hereto
agree as follows:

    1.  REPRESENTATIONS OF STOCKHOLDERS.

    Each of the Stockholders represents and warrants to IMS that (a) such
Stockholder lawfully owns beneficially (as such term is defined in Rule 13d-3 of
the Exchange Act) and of record each of the shares of Common Stock, par value
$0.001 per share, of TriZetto (the "TRIZETTO COMMON STOCK"), set forth opposite
such Stockholder's name on EXHIBIT A hereto (such Stockholder's "SHARES") free
and clear of all liens, claims, charges, security interests or other
encumbrances and, except for this Agreement and the Merger Agreement, there are
no options, warrants or other rights, agreements, arrangements or commitments of
any character to which such Stockholder is a party relating to the pledge,
disposition or Voting of any shares of capital stock of TriZetto and there are
no Voting trusts or Voting agreements with respect to such Shares, (b) such
Stockholder does not beneficially own (as such term is used in Rule 13d-3 of the
Exchange Act) any shares of TriZetto Common Stock other than such Shares and
does not have any options, warrants or other rights to acquire any additional
shares of capital stock of TriZetto or any security exercisable for or
convertible into shares of capital stock of TriZetto other than those options,
warrants or other rights set forth opposite such Stockholder's name on
EXHIBIT B hereto (such Stockholder's "OPTIONS") and each Stockholder represents
and warrants that such Stockholder shall not exercise any such Options prior to
the termination of this Agreement except in accordance with Section 6 of this
Agreement, (c) such

                                     C-3-1
<PAGE>
Stockholder has full power and authority and has taken all actions necessary to
enter into, execute and deliver this Agreement and to perform fully such
Stockholder's obligations hereunder and this Agreement has been duly executed
and delivered and constitutes the legal, valid and binding obligation of such
Stockholder enforceable against such Stockholder in accordance with its terms,
subject to the Bankruptcy and Equity Exception, (d) other than filings under the
Exchange Act, no notices, reports or other filings are required to be made by
such Stockholder with, nor are any consents, registrations, approvals, permits
or authorizations required to be obtained by such Stockholder from, any
Governmental Entity, in connection with the execution and delivery of this
Agreement by such Stockholder, and (e) the execution, delivery and performance
of this Agreement by such Stockholder does not, and the consummation by such
Stockholder of the transactions contemplated hereby will not, violate, conflict
with or constitute a breach of, or a default under, the certificate of
incorporation or by-laws of such Stockholder or any or their comparable
governing instruments (if such Stockholder is not a natural person) or result in
a violation or breach of, or constitute (with or without due notice or lapse of
time or both) a default (or give rise to any right of termination, cancellation,
modification or acceleration) (whether after the giving of or the passage of
time of both) under any contract to which such Stockholder is a party or which
is binding on it or its assets and will not result in the creation of any lien
on, or security interest in, any of the assets on properties of such
Stockholder.

    2.  AGREEMENT TO DELIVER PROXY.

    Each of the Stockholders agrees to deliver to IMS on the date hereof an
irrevocable proxy substantially in the form attached hereto as EXHIBIT C to Vote
such Stockholder's Shares (a) in favor of approval and adoption of the Merger
Agreement, the Merger and the transactions contemplated thereby, the issuance of
TriZetto Common Stock to IMS stockholders pursuant to the Merger Agreement, the
TriZetto Charter Amendments and the Stock Option Plan at any meeting of the
stockholders of TriZetto at which such matters are considered and at every
adjournment or postponement thereof, (b) against any action or agreement that
would compete with, impede, interfere with or tend to discourage the
Transactions or inhibit the timely consummation of the Transactions,
(c) against any action or agreement that would result in a breach in any
material respect of any covenant, representation or warranty or any other
obligation of TriZetto under the Merger Agreement and (d) except for the
Transactions, against any merger, consolidation, business combination,
reorganization, recapitalization, liquidation or sale or transfer of any
material assets of TriZetto or the TriZetto Subsidiaries. The proxy delivered by
each of the Stockholders pursuant to this Section 2 shall be irrevocable during
the term of this Agreement to the extent permitted under Delaware law. For
purposes of this Agreement, "VOTE" shall include voting in person or by proxy in
favor of or against any action, otherwise consenting or withholding consent in
respect of any action (including, but not limited to, consenting in accordance
with Section 228 of the Delaware General Corporation Law) or taking other action
in favor of or against any action. "VOTING" shall have a correlative meaning.

    3.  NO VOTING TRUSTS.

    Each of the Stockholders agrees that they will not, nor will they permit any
entity or person under their control to, deposit any of its Shares or New Shares
(as defined in Section 6 hereof) in a Voting trust or subject any of their
Shares or New Shares to any arrangement with respect to the Voting of such
Shares or New Shares other than agreements entered into with IMS.

    4.  NO PROXY SOLICITATIONS.

    Each of the Stockholders agrees that such Stockholder will not, nor will
such Stockholder permit any entity or person under such Stockholder's control,
(a) to solicit proxies or become a "participant" in a "solicitation" (as such
terms are defined in Regulation 14A under the Exchange Act) in opposition to or
in competition with the consummation of the Transactions or otherwise encourage
or assist any party in taking or planning any action which would compete with,
impede, interfere with or tend to discourage the Transactions or inhibit the
timely consummation of the Transactions, (b) to directly or

                                     C-3-2
<PAGE>
indirectly encourage, initiate or cooperate in a stockholders' Vote or action by
consent of TriZetto's stockholders in opposition to or in competition with the
consummation of the Transactions or (c) to become a member of a "group" (as such
term is used in Section 13(d) of the Exchange Act) with respect to any voting
securities of TriZetto for the purpose of opposing or competing with the
consummation of the Transactions.

    5.  TRANSFER AND ENCUMBRANCE.

    On or after the date hereof and during the term of this Agreement, each of
the Stockholders agrees not to transfer, sell, offer, exchange, pledge or
otherwise dispose of or encumber any of such Stockholder's Shares, Options or
New Shares; PROVIDED, that a Stockholder may transfer such Stockholder's Shares
or New Shares if, prior to such transfer, the transferee of such Shares or New
Shares, as applicable, shall have executed for the benefit of IMS, a legally
binding instrument pursuant to which such transferee agrees to assume all of
such Stockholder's obligations under this Agreement, including the delivery of
an irrevocable proxy to IMS substantially in the form attached hereto as
EXHIBIT C with respect to such transferred Shares or New Shares, as applicable.

    6.  ADDITIONAL PURCHASES.

    Each of the Stockholders agrees that such Stockholder will not purchase or
otherwise acquire beneficial ownership (as such term is used in Rule 13d-3 of
the Exchange Act) of any shares of TriZetto Common Stock after the execution of
this Agreement, including, but not limited to, acquisition by virtue of
exercising any Option ("NEW SHARES"), nor will any Stockholder voluntarily
acquire the right to Vote or share in the Voting of any shares of TriZetto
Common Stock other than the Shares, unless such Stockholder agrees to deliver to
IMS immediately after such purchase or acquisition an irrevocable proxy
substantially in the form attached hereto as EXHIBIT D with respect to such New
Shares. Each of the Stockholders also severally agrees that any New Shares
acquired or purchased by him or her shall be subject to the terms of this
Agreement to the same extent as if they constituted Shares.

    7.  SPECIFIC PERFORMANCE AND OPTION TO PURCHASE.

    Each party hereto acknowledges that it will be impossible to measure in
money the damage to the other party if a party hereto fails to comply with any
of the obligations imposed by this Agreement, that every such obligation is
material and that, in the event of any such failure, the other party will not
have an adequate remedy at law or damages. Accordingly, each party hereto agrees
that injunctive relief or other equitable remedy, in addition to remedies at law
or damages, is the appropriate remedy for any such failure and will not oppose
the granting of such relief on the basis that the other party has an adequate
remedy at law. Each party hereto agrees that it will not seek, and agrees to
waive any requirement for, the securing or posting of a bond in connection with
any other party's seeking or obtaining such equitable relief.

    8.  ENTIRE AGREEMENT; AMENDMENT; WAIVER.

    This Agreement (including the exhibits hereto) supersedes all prior
agreements, written or oral, among the parties hereto with respect to the
subject matter hereof and contains the entire agreement among the parties with
respect to the subject matter hereof. This Agreement may not be amended,
supplemented or modified, and no provisions hereof may be modified or waived,
except by an instrument in writing signed by all the parties hereto. No waiver
of any provisions hereof by any party shall be deemed a waiver of any other
provisions hereof by any such party, nor shall any such waiver be deemed a
continuing waiver of any provision hereof by such party.

    9.  NOTICES.

    All notices, requests, claims, demands or other communications hereunder
shall be in writing and shall be deemed given when delivered personally, upon
receipt of a transmission confirmation if sent by

                                     C-3-3
<PAGE>
telecopy or like transmission and on the next business day when sent by Federal
Express, Express Mail or other reputable overnight courier service to the
parties at the following addresses (or at such other address for a party as
shall be specified by like notice):

       If to IMS:

           IMS Health Incorporated
           200 Nyala Farms
           Westport, Connecticut 06880
           Attention: Chief Executive Officer
           Telecopy: (203)222-4247

       With copies, which shall not constitute notice, to:

           IMS Health Incorporated
           200 Nyala Farms
           Westport, Connecticut 06880
           Attention: David Stevens
                    Jared Finkelstein

           Telecopy: (203)222-4268

       and

           Sullivan & Cromwell
           125 Broad Street
           New York, New York 10004
           Attention: Alan J. Sinsheimer
                    Keith A. Pagnani

           Telecopy: (212) 558-3588

    If to a Stockholder, to the address or telecopy number set forth for such
Stockholder on the signature page hereof:

       With a copy to:

           The TriZetto Group, Inc.
           567 San Nicolas Drive
           Newport Beach, California 92660
           Attention: General Counsel
           Telecopy: (949) 219-2197

or to such other Persons on addresses as may be designated in writing by the
party to receive such notice as provided above.

    10.  MISCELLANEOUS.

        (a)  GOVERNING LAW.  THIS AGREEMENT AND THE RIGHTS AND OBLIGATIONS OF
    THE PARTIES HERETO SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH AND
    SUBJECT TO THE LAWS OF THE STATE OF DELAWARE, WITHOUT REFERENCE TO CONFLICTS
    OF LAWS PRINCIPLES.

        (b)  VENUE; WAIVER OF JURY TRIAL.  The parties hereby irrevocably submit
    to the jurisdiction of the courts of the State of Delaware and the Federal
    courts of the United States of America located in the State of Delaware
    solely in respect of the interpretation and enforcement of the provisions of
    this Agreement and of the documents governed by Delaware law referred to in
    this Agreement, and in respect of the transactions contemplated hereby, and
    hereby waive, and agree not to assert, as a defense in any action, suit or
    proceeding for the interpretation or

                                     C-3-4
<PAGE>
    enforcement hereof or of any such document, that it is not subject thereto
    or that such action, suit or proceeding may not be brought or is not
    maintainable in said courts or that the venue thereof may not be appropriate
    or that this Agreement or any such document may not be enforced in or by
    such courts, and the parties hereto irrevocably agree that all claims with
    respect to such action or proceeding shall be heard and determined in such a
    Delaware State or Federal court. The parties hereby consent to and grant any
    such court jurisdiction over the person of such parties and over the subject
    matter of such dispute and agree that mailing of process or other papers in
    connection with any such action or proceeding in the manner provided in
    Section 9 of this Agreement or in such other manner as may be permitted by
    law shall be valid and sufficient service thereof.

        EACH PARTY ACKNOWLEDGES AND AGREES THAT ANY CONTROVERSY WHICH MAY ARISE
    UNDER THIS AGREEMENT IS LIKELY TO INVOLVE COMPLICATED AND DIFFICULT ISSUES,
    AND THEREFORE EACH SUCH PARTY HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVES
    ANY RIGHT SUCH PARTY MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY
    LITIGATION DIRECTLY OR INDIRECTLY ARISING OUT OF OR RELATING TO THIS
    AGREEMENT, OR THE TRANSACTIONS CONTEMPLATED BY THIS AGREEMENT. EACH PARTY
    CERTIFIES AND ACKNOWLEDGES THAT (i) NO REPRESENTATIVE, AGENT OR ATTORNEY OF
    ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER
    PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING
    WAIVER, (ii) EACH PARTY UNDERSTANDS AND HAS CONSIDERED THE IMPLICATIONS OF
    THIS WAIVER, (iii) EACH PARTY MAKES THIS WAIVER VOLUNTARILY, AND (iv) EACH
    PARTY HAS BEEN INDUCED TO ENTER INTO THIS AGREEMENT BY, AMONG OTHER THINGS,
    THE MUTUAL WAIVERS AND CERTIFICATIONS IN THIS SECTION 10 (b).

        (c)  SEVERABILITY.  In the event that any provision of the Agreement is
    held to be illegal, invalid or unenforceable in a final, unappealable order
    or judgment (each such provision, an "INVALID PROVISION"), then such
    provision shall be severed from this Agreement and shall be inoperative and
    the parties promptly shall negotiate in good faith a lawful, valid and
    enforceable provision that is as similar to the invalid provision as may be
    possible and that preserves the original intentions and economic positions
    of the parties as set forth herein to the maximum extent feasible, while the
    remaining provisions of this Agreement shall remain binding on the parties
    hereto. Without limiting the generality of the foregoing sentence, in the
    event a change in any applicable law, rule or regulation makes it unlawful
    for a party to comply with any of its obligations hereunder, the parties
    shall negotiate in good faith a modification to such obligation to the
    extent necessary to comply with such law, rule or regulation that is as
    similar in terms to the original obligation as may be possible while
    preserving the original intentions and economic positions of the parties as
    set forth herein to the maximum extent feasible.

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

        (e)  TERMINATION.  This Agreement shall terminate upon the earliest to
    occur of (i) the Closing, (ii) the termination of the Merger Agreement and
    (iii) the date specified in a written agreement duly executed and delivered
    by IMS and each of the Stockholders.

        (f)  FURTHER ASSURANCES.  Each party hereto shall execute and deliver
    such additional instruments and other documents and shall take such further
    actions as may be necessary or desirable to effectuate, carry out and comply
    with all of the terms of this Agreement and the transactions contemplated
    hereby.

                                     C-3-5
<PAGE>
        (g)  HEADINGS; RECITALS.  All Section headings and the recitals herein
    are for convenience of reference only and are not part of this Agreement,
    and no construction or reference shall be derived therefrom.

        (h)  THIRD PARTY BENEFICIARIES.  NOTHING IN THIS AGREEMENT, EXPRESS OR
    IMPLIED, IS INTENDED TO CONFER UPON ANY THIRD PARTY ANY RIGHTS OR REMEDIES
    OF ANY NATURE WHATSOEVER UNDER OR BY REASON OF THIS AGREEMENT.

                                     C-3-6
<PAGE>
    IN WITNESS WHEREOF, the parties hereto have executed and delivered this
Agreement as of the date first written above.

<TABLE>
<S>                                                    <C>  <C>
                                                       IMS HEALTH INCORPORATED

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

                                                       STOCKHOLDER:

                                                       By:
                                                            -----------------------------------------
                                                            Name:
                                                            Title:
                                                            Address:
                                                            Telecopy:
</TABLE>

                                     C-3-7
<PAGE>
                                                                       EXHIBIT A

                                  STOCKHOLDERS

<TABLE>
<CAPTION>
NAME                                                          NUMBER OF SHARES
----                                                          ----------------
<S>                                                           <C>
</TABLE>

                                     C-3-8
<PAGE>
                                                                       EXHIBIT B

                              STOCKHOLDERS OPTIONS

<TABLE>
<CAPTION>
NAME                                                          OPTIONS
----                                                          -------
<S>                                                           <C>
</TABLE>

                                     C-3-9
<PAGE>
                                                                       EXHIBIT C

                                 FORM OF PROXY

    The undersigned, for consideration received, hereby appoints Victoria Fash
or another representative of IMS Health Incorporated, a Delaware corporation
("IMS"), designated by her and each of them my proxies, with full power of
substitution and resubstitution, (i) to vote all shares of Common Stock, par
value $0.001 per share, of The TriZetto Group, Inc., a Delaware corporation
("TRIZETTO"), owned by the undersigned (the "SHARES") as of the date hereof at
any meetings of stockholders of TriZetto after the date hereof and at any
adjournment or postponement thereof (each, a "TRIZETTO MEETING") FOR approval
and adoption of (a) the Agreement and Plan of Reorganization, dated as of
March   , 2000 (the "MERGER AGREEMENT"), by and between TriZetto and IMS, and
the transactions contemplated thereby, (b) the issuance of TriZetto Common Stock
to IMS stockholders pursuant to the Merger Agreement, (c) certain amendments to
TriZetto's certificate of incorporation contemplated by the Merger Agreement,
and (d) a new TriZetto stock option plan in such form and with such number of
available options issuable thereunder as shall be agreed upon by IMS and
TriZetto (collectively, the "TRANSACTIONS"), and AGAINST (a) any action or
agreement that would compete with, impede, interfere with or tend to discourage
the Transactions or inhibit the timely consummation of the Transactions,
(b) any action or agreement that would result in a breach in any material
respect of any covenant, representation or warranty or any other obligation of
TriZetto under the Merger Agreement, or (c) except for the Transactions, any
merger, consolidation, business combination, reorganization, recapitalization,
liquidation or sale or transfer of any material assets of TriZetto or its
subsidiaries, and (ii) to withhold consents with respect to such Shares for
(a) any action or agreement that would compete with, impede, interfere with or
tend to discourage the Transactions or inhibit the timely consummation of the
Transactions, (b) any action or agreement that would result in a breach in any
material respect of any covenant, representation or warranty or any other
obligation of TriZetto under the Merger Agreement, or (c) except for the
Transactions, any merger, consolidation, business combination, reorganization,
recapitalization, liquidation or sale or transfer of any material assets of
TriZetto or its subsidiaries. This proxy is coupled with an interest, revokes
all prior proxies granted by the undersigned and is irrevocable until such time
as the Voting Agreement, dated as of March   , 2000, among certain stockholders
of TriZetto, including the undersigned, and IMS, terminates in accordance with
its terms, at which time this proxy shall expire.

                                          Dated March   , 2000
                                          --------------------------------------
                                          (Signature of Stockholder)

                                     C-3-10
<PAGE>
                                                                       EXHIBIT D

                                 FORM OF PROXY

    The undersigned, for consideration received, hereby appoints Victoria Fash
or another representative of IMS Health Incorporated, a Delaware corporation
("IMS"), designated by her and each of them my proxies, with full power of
substitution and resubstitution, (i) to vote the             shares of Common
Stock, par value $0.001 per share (the "NEW SHARES"), of The TriZetto
Group, Inc., a Delaware corporation ("TRIZETTO"), purchased or otherwise
acquired by the undersigned, or for which the undersigned has voluntarily
acquired the right to vote or share in the voting of such shares, since the
execution of the Voting Agreement, dated as of March   , 2000 (the "VOTING
AGREEMENT"), by and among certain stockholders of TriZetto, including the
undersigned, and IMS, at any meetings of stockholders of TriZetto after the date
hereof and at any adjournment or postponement thereof (each, a "TRIZETTO
MEETING") FOR approval and adoption of (a) the Agreement and Plan of
Reorganization, dated as of March   , 2000 (the "MERGER AGREEMENT"), by and
between TriZetto and IMS, and the transactions contemplated thereby, (b) the
issuance of TriZetto Common Stock to IMS stockholders pursuant to the Merger
Agreement, (c) certain amendments to TriZetto's certificate of incorporation
contemplated by the Merger Agreement and (d) a new TriZetto stock option plan in
such form and with such number of available options issuable thereunder as shall
be agreed upon by IMS and TriZetto (collectively, the "TRANSACTIONS"), and
AGAINST (a) any action or agreement that would compete with, impede, interfere
with or tend to discourage the Transactions or inhibit the timely consummation
of the Transactions, (b) any action or agreement that would result in a breach
in any material respect of any covenant, representation or warranty or any other
obligation of TriZetto under the Merger Agreement, or (c) except for the
Transactions, any merger, consolidation, business combination, reorganization,
recapitalization, liquidation or sale or transfer of any material assets of
TriZetto or its subsidiaries, and (ii) to withhold consents with respect to such
New Shares for (a) any action or agreement that would compete with, impede,
interfere with or tend to discourage the Transactions or inhibit the timely
consummation of the Transactions, (b) any action or agreement that would result
in a breach in any material respect of any covenant, representation or warranty
or any other obligation of TriZetto under the Merger Agreement, or (c) except
for the Transactions, any merger, consolidation, business combination,
reorganization, recapitalization, liquidation or sale or transfer of any
material assets of TriZetto or its subsidiaries. This proxy is coupled with an
interest and is irrevocable until such time as the Voting Agreement terminates
in accordance with its terms, at which time this proxy shall expire.

                                          Dated             , 200__
                                          --------------------------------------
                                          (Signature of Stockholder)

                                     C-3-11
<PAGE>
                                                                      APPENDIX D

                         REGISTRATION RIGHTS AGREEMENT
                          Dated as of           , 2000
                                 by and between
                            The TriZetto Group, Inc.
                                      and
                            IMS Health Incorporated
<PAGE>
    This REGISTRATION RIGHTS AGREEMENT (the "AGREEMENT") is made and entered
into as of             , 2000, by and between The TriZetto Group, Inc., a
Delaware corporation (TRIZETTO"), and IMS Health Incorporated, a Delaware
corporation ("IMS").

                                    RECITALS

    WHEREAS, TriZetto, Elbejay Acquisition Corp., a Delaware corporation and a
wholly owned subsidiary of TriZetto ("MERGER SUB"), IMS and ERISCO Managed Care
Technologies, Inc., a New York corporation and a wholly owned subsidiary of IMS
("ERISCO"), have entered into an Agreement and Plan of Reorganization, dated as
of May 16, 2000 (the "MERGER AGREEMENT");

    WHEREAS, pursuant to the Merger Agreement, IMS will receive [      ] shares
of Common Stock, par value $0.001 per share, of TriZetto ("TRIZETTO COMMON
STOCK");

    WHEREAS, in connection with TriZetto's previous issuance of an aggregate of
4,545,454 shares of Series A Preferred Stock, par value $0.001 per share, and
1,730,770 shares of Series B Preferred Stock, par value $0.001 per share,
TriZetto entered into a First Amended and Restated Investor Rights Agreement,
dated April 9, 1999 (the "INVESTOR RIGHTS AGREEMENT"), pursuant to which the
purchasers of such preferred stock (the "VENTURE CAPITALISTS") were granted
certain registration rights;

    WHEREAS, the Venture Capitalists continue to have registration rights
relating to the 6,276,224 shares of TriZetto Common Stock which were issued upon
the conversion of the shares of TriZetto preferred stock held by the Venture
Capitalists on October 14, 1999;

    WHEREAS, pursuant to the Investor Rights Agreement, TriZetto has obtained
the consents and any necessary waivers of the Venture Capitalists such that
TriZetto may provide the registration rights set forth in this Agreement; and

    WHEREAS, TriZetto has agreed to provide the registration rights set forth in
this Agreement;

    NOW THEREFORE, in consideration of the mutual covenants and undertakings
contained herein, and for other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, and subject to and on the terms
and conditions herein set forth, the parties hereto agree as follows:

    1.  DEFINITIONS.

    Capitalized terms used but not defined in this Agreement shall have the
respective meanings assigned to such terms in the Merger Agreement. As used in
this Agreement, the following capitalized terms shall have the following
meanings:

    "AICPA" shall mean the American Institute of Certified Public Accountants.

    "DEMAND REGISTRATION" shall have the meaning set forth in Section 2(a)
hereof.

    "DEMAND REGISTRATION STATEMENT" shall have the meaning set forth in
Section 2(a) hereof.

    "EFFECTIVE TIME" shall mean the date on which the SEC declares a
Registration Statement effective or on which such Registration Statement
otherwise becomes effective.

    "ERISCO" shall have the meaning set forth in the Recitals.

    "EXCHANGE ACT" shall mean the Securities Exchange Act of 1934, as amended.

    "INDEMNIFIED PERSON" shall have the meaning set forth in Section 6(a)
hereof.

    "INVESTOR RIGHTS AGREEMENT" shall have the meaning set forth in the
Recitals.

    "IMS" shall have the meaning set forth in the Preamble.

                                      D-2
<PAGE>
    "MERGER AGREEMENT" shall have the meaning set forth in the Recitals.

    "MERGER SUB" shall have the meaning set forth in the Recitals.

    "NASD RULES" shall mean the Rules of the National Association of Securities
Dealers, Inc., as amended from time to time.

    "PERSON" shall mean an individual, partnership, corporation, trust or
unincorporated organization, or a government or agency or political subdivision
thereof.

    "PIGGYBACK REGISTRATION" shall have the meaning set forth in Section 3(a)
hereof.

    "PROPOSED REGISTRATION" shall have the meaning set forth in Section 3(a)
hereof.

    "PROSPECTUS" shall mean the prospectus (including, without limitation, any
preliminary prospectus, any final prospectus and any prospectus that discloses
information previously omitted from a prospectus filed as part of an effective
registration statement in reliance upon Rule 430A under the Securities Act)
included in a Registration Statement, as amended or supplemented by any
prospectus supplement with respect to the terms of the offering of any portion
of the Registrable Securities covered by such Registration Statement and by all
other amendments and supplements to such prospectus, including all material
incorporated by reference in such prospectus and all documents filed after the
date of such prospectus by TriZetto under the Exchange Act and incorporated by
reference therein.

    "REGISTRATION EXPENSES" shall have the meaning set forth in Section 5(a)
hereof.

    "REGISTRABLE SECURITIES" shall mean the TriZetto Common Stock issued to IMS
in connection with the Merger, PROVIDED that a security ceases to be a
Registrable Security when it is no longer a Restricted Security.

    "REGISTRATION STATEMENT" shall mean any registration statement of TriZetto
which covers Registrable Securities pursuant to the provisions of this
Agreement, including the Prospectus, amendments and supplements to such
registration statement, including pre- and post-effective amendments, and all
exhibits and all material incorporated by reference in such registration
statement.

    "RESTRICTED SECURITY" shall mean any security unless and until:

    (i) a registration statement with respect to the sale of such security shall
have been declared effective under the Securities Act and such security shall
have been disposed of in accordance with such registration statement,

    (ii) it is distributed to the public pursuant to Rule 144 (or any similar
provision then in force) under the Securities Act,

   (iii) the provisions of Section 7(b) hereof apply, or

    (iv) such security shall have been otherwise transferred pursuant to an
applicable exemption under the Securities Act, new certificates for such
security not bearing a legend restricting further transfer shall have been
delivered by TriZetto and such security shall be freely transferable to the
public without registration under the Securities Act.

    "SECURITIES ACT" shall mean the Securities Act of 1933, as amended.

    "SEC" shall mean the Securities and Exchange Commission.

    "TRIZETTO" shall have the meaning set forth in the Preamble.

    "TRIZETTO COMMON STOCK" shall have the meaning set forth in the Recitals.

                                      D-3
<PAGE>
    "UNDERWRITTEN", "UNDERWRITTEN REGISTRATION", "UNDERWRITTEN OFFERING" or
"UNDERWRITTEN REGISTERED OFFERING" shall mean a registration in which securities
of TriZetto are sold to an underwriter for re-offering to the public pursuant to
an effective Registration Statement.

    "VENTURE CAPITALISTS" shall have the meaning set forth in the Recitals.

    2.  DEMAND REGISTRATIONS.

        (a)  NOTICE.  At any time following the date two (2) years after the
    Closing Date, IMS shall have the right, on not more than three
    (3) occasions in the aggregate and no more frequently than once in any one
    (1) year period, to make a written request to TriZetto that TriZetto file a
    registration statement (a "DEMAND REGISTRATION STATEMENT") registering for
    offer and sale at least 20% of the Registrable Securities then held by it
    with the SEC under and in accordance with provisions of the Securities Act
    (a "DEMAND REGISTRATION"). All requests made pursuant to this paragraph will
    specify the aggregate number of the Registrable Securities to be registered
    and will also specify the intended methods of disposition thereof.

        (b)  RESTRICTIONS.  Each Demand Registration Statement shall be filed as
    soon as possible after the date IMS makes the written request for
    registration under the preceding paragraph, so long as Registrable
    Securities are still outstanding at each such time; PROVIDED, HOWEVER, that
    TriZetto shall have the right to postpone the filing, or delay the
    effectiveness, of a Registration Statement, or fail to keep such
    Registration Statement continuously effective or not amend or supplement the
    Registration Statement or included Prospectus, (i) if TriZetto determines
    based upon the advice of counsel that it would be advisable to disclose in
    the Registration Statement material non-public information, and TriZetto
    shall have determined in good faith, and shall have provided written notice
    to IMS that such disclosure is not in the best interests of TriZetto and its
    stockholders or (ii) during the period commencing 30 days prior to the
    expected effective date, which date shall be determined by the managing
    underwriter of such public offering, and ending 90 days following the
    effective date, of any registration statement pertaining to an underwritten
    public offering of securities of TriZetto (other than a registration on
    Form S-4 relating solely to a SEC Rule 145 transaction, or a registration
    relating solely to employee benefit plans); PROVIDED FURTHER that in the
    case of clause (i) above, no one such postponement shall exceed 60 days and
    all such postponements in any one year period shall not exceed 120 days in
    the aggregate.

        (c)  EFFECTIVENESS.  TriZetto agrees to use its reasonable best efforts
    to cause each such Demand Registration Statement to be declared effective by
    the SEC within 45 calendar days after filing, and to keep it continuously
    effective for a period of 120 days following the dates on which each such
    Demand Registration Statement is declared effective or until all Registrable
    Securities included therein have been sold, if earlier.

        (d)  PRIORITY OF SECURITIES IN DEMAND REGISTRATIONS.  In connection with
    any underwritten Demand Registration, if the managing underwriter or
    underwriters advise TriZetto in writing that, in its or their reasonable
    opinion, the inclusion of the number of securities proposed to be registered
    exceeds the number which can be sold in such offering, TriZetto will include
    in such registration the number of securities which, in the opinion of such
    underwriter or underwriters, can be sold as follows: (i) first, the
    Registrable Securities requested to be included in such Demand Registration;
    (ii) second, the TriZetto Common Stock requested to be included in such
    Demand Registration by the Venture Capitalists, pro rata among the Venture
    Capitalists which have requested their TriZetto Common Stock to be included
    therein; (iii) third, any TriZetto Common Stock TriZetto proposes to sell;
    (iv) fourth, the TriZetto Common Stock requested to be included in such
    Demand Registration, pro rata among the holders of TriZetto Common Stock,
    other than the Venture Capitalists, which have requested their TriZetto
    Common Stock to be included therein; and (v) fifth, other TriZetto Common
    Stock requested to be included in such Demand Registration.

                                      D-4
<PAGE>
        (e)  SELECTION OF UNDERWRITERS.  TriZetto shall have the right, with
    respect to any Registration Statement to be filed as a result of a Demand
    Registration, to determine whether such registration shall be underwritten
    or not and to select any managing underwriter or underwriters to administer
    the offering, which managing underwriter or underwriters will be of
    nationally recognized standing and which will be reasonably acceptable to
    IMS.

        (f)  WITHDRAWAL OF DEMAND REGISTRATION.  IMS shall have the right to
    withdraw any request for registration pursuant to Section 2(a) hereof after
    the Registration Statement has been filed with the SEC, but prior to the
    time the Registration Statement in respect of such Registration has been
    declared effective, PROVIDED, HOWEVER, the Registration requested by IMS
    shall be deemed to have been effected (and, therefore, requested) for
    purposes of Section 2(a) hereof unless IMS pays all Registration Expenses
    (as defined in Section 5 hereof) in connection with the filing of the
    withdrawn Registration Statement.

    3.  PIGGYBACK REGISTRATION RIGHTS.

        (a)  RIGHTS TO PIGGYBACK.  At any time following the date two (2) years
    after the Closing Date, subject to the last sentence of this paragraph,
    whenever TriZetto proposes to file a registration statement under the
    Securities Act (a "PROPOSED REGISTRATION") with respect to any proposed
    public offering by TriZetto or by any holders of TriZetto Common Stock (or
    securities convertible into or exchangeable or exercisable for TriZetto
    Common Stock) and the registration form to be used may be used for the
    registration of the Registrable Securities (a "PIGGYBACK REGISTRATION"),
    TriZetto will give prompt written notice to IMS of its intention to effect
    such a registration and will, subject to Section 3(b) below, include in such
    Piggyback Registration all Registrable Securities with respect to which
    TriZetto has received written request for inclusion therein within 15 days
    after receipt of TriZetto's notice. Registrable Securities with respect to
    which such requests for registration have been received will be registered
    by TriZetto and offered to the public pursuant to this Section 3 on the same
    terms and subject to the same conditions applicable to the registration in a
    Proposed Registration of TriZetto Common Stock to be sold by TriZetto or by
    persons selling under such Proposed Registration. Holders of Registrable
    Securities will not be entitled to include TriZetto Common Stock pursuant to
    this Section 3(a) in any Registration Statement pertaining to the
    registration of any securities of TriZetto in connection with mergers,
    acquisitions, exchange offers, subscription offers, dividend reinvestment
    plans or stock options or other employee benefit plans.

        (b)  PRIORITY ON PIGGYBACK REGISTRATIONS.  In connection with an
    underwritten Piggyback Registration, if the managing underwriter or
    underwriters advise TriZetto in writing that, in its or their reasonable
    opinion, the inclusion of the number of securities proposed to be registered
    exceeds the number which can be sold in such offering, TriZetto will include
    in such registration the number of securities which, in the opinion of such
    underwriter or underwriters, can be sold as follows: (i) first, the TriZetto
    Common Stock TriZetto proposes to sell or if the registration is in response
    to a demand registration right of a Person (other than IMS) whose
    registration rights require such a priority, the securities that the
    Person(s) demanding such registration propose or proposes to sell to the
    extent of such a priority, (ii) second, any securities requested to be
    included in such registration by the Venture Capitalists who exercise their
    rights to have their securities included in such registration, (iii) third,
    the Registrable Securities requested to be included in such registration,
    (iv) fourth, any securities requested to be included in such registration by
    a Person who exercises its rights to have its securities included in such
    registration, but only to the extent of such rights, pro rata among such
    Persons which have requested their securities to be included therein, and
    (v) fifth, other TriZetto Common Stock requested to be included in such
    registration.

        (c)  SELECTION OF UNDERWRITERS.  If any Piggyback Registration is an
    underwritten offering, TriZetto will select a managing underwriter or
    underwriters to administer the offering. As a

                                      D-5
<PAGE>
    condition to participation in such an offering, each holder of Registrable
    Securities shall execute an underwriting agreement in a customary form
    requested by such underwriter.

    4.  REGISTRATION PROCEDURES.

    In connection with TriZetto's obligation to file Registration Statements
pursuant to Sections 2 or 3 hereof, TriZetto shall use its reasonable best
efforts to effect such registration to permit the sale of such Registrable
Securities in accordance with the intended method or methods of disposition
thereof, and pursuant thereto TriZetto shall:

        (a) before filing a Registration Statement or Prospectus or any
    amendments or supplements thereto, including documents incorporated by
    reference after the initial filing of the Registration Statement, furnish to
    IMS and the managing underwriters, if any, copies of all such documents
    proposed to be filed, which documents will be subject to the review of IMS
    and such managing underwriters, and TriZetto shall not file any Registration
    Statement or amendment thereto or any Prospectus or any supplement thereto
    (including such documents incorporated by reference) to which IMS or the
    managing underwriters, if any, shall reasonably object;

        (b) prepare and file with the SEC such amendments and post-effective
    amendments to any Registration Statement, and such supplements to the
    Prospectus, as may be reasonably requested by IMS or any underwriter of
    Registrable Securities or as may be required by the Securities Act or any
    rules or regulations promulgated thereunder or otherwise necessary to keep
    the Registration Statement effective for the applicable period;

        (c) cause the final Prospectus as supplemented to be filed pursuant to
    Rule 424 under the Securities Act if then required by the Securities Act;

        (d) comply with the provisions of the Securities Act with respect to the
    disposition of all securities covered by such Registration Statement during
    the applicable period in accordance with the intended methods of disposition
    by the sellers thereof set forth in such Registration Statement or
    supplement to the Prospectus;

        (e) notify IMS and the managing underwriters, if any, promptly, and (if
    requested by any such Person) confirm such notification in writing:

           (1) when the Prospectus or any Prospectus supplement or
       post-effective amendment has been filed, and, with respect to the
       Registration Statement or any post-effective amendment, when the same has
       become effective,

           (2) of any request by the SEC for amendments or supplements to the
       Registration Statement or the Prospectus or for additional information,

           (3) of the issuance by the SEC of any stop order suspending the
       effectiveness of the Registration Statement or the initiation of any
       proceedings for that purpose,

           (4) of the receipt by TriZetto of any notification with respect to
       the suspension of the qualification of the Registrable Securities for
       sale in any jurisdiction or the initiation or threatening of any
       proceeding for such purpose, and

           (5) while such Registration Statement is in effect, of the happening
       of any event or the existence of any state of facts that requires the
       making of any changes in the Registration Statement or the Prospectus
       included therein so that, as of such date, such Registration Statement
       and Prospectus do not contain an untrue statement of a material fact and
       do not omit to state a material fact required to be stated therein or
       necessary to make the statements therein (in the case of the Prospectus,
       in light of the circumstances under which they were made) not misleading
       (which advice shall be accompanied by an instruction to IMS to suspend
       the use of the Prospectus until the requisite changes have been made);

                                      D-6
<PAGE>
        (f) use its reasonable best efforts to prevent the issuance, and if
    issued to obtain the withdrawal, of any order suspending the effectiveness
    of the Registration Statement at the earliest possible time;

        (g) if reasonably requested by IMS, as the case may be, or the managing
    underwriter, immediately incorporate in a Prospectus supplement or
    post-effective amendment such information as IMS, as the case may be, and
    the managing underwriters agree is required to be included therein pursuant
    to the Securities Act and the rules and regulations promulgated thereunder,
    relating to the sale of the Registrable Securities, including, without
    limitation, information with respect to the number of Registrable Securities
    being sold to such underwriters, the purchase price being paid therefor by
    such underwriters and with respect to any other terms of the underwritten
    (or best efforts underwritten) offering of the Registrable Securities to be
    sold in such offering, including the plan of distribution therefor; and make
    all required filings of such Prospectus supplement or post-effective
    amendment as soon as practicable as notified of the matters to be
    incorporated in such Prospectus supplement or post-effective amendment;

        (h) promptly prior to the filing of any document which is to be
    incorporated by reference into the Registration Statement or the Prospectus
    (after initial filing of the Registration Statement) (i) provide copies of
    such document to counsel to IMS and to the managing underwriters, if any,
    and (ii) make TriZetto's representatives available for discussion of such
    document and make such changes in such document prior to the filing thereof
    as counsel for IMS or such underwriters may reasonably request; PROVIDED,
    HOWEVER, that nothing herein shall prevent TriZetto from filing any document
    that in the reasonable judgment of TriZetto, after consultation with
    counsel, is required to be filed under the Securities Act or the Exchange
    Act;

        (i) furnish to IMS and each managing underwriter, without charge, at
    least one signed copy of the Registration Statement and any post-effective
    amendment thereto, including financial statements and schedules, all
    documents incorporated therein by reference and all exhibits (including
    those incorporated by reference);

        (j) deliver to IMS and the underwriters, if any, without charge, as many
    copies of the Prospectus (including each preliminary Prospectus) and any
    amendment or supplement thereto as such Persons may reasonably request;
    TriZetto consents (except during the continuance of any event described in
    Section 4(e)(5) above) to the use of the Prospectus and any amendment or
    supplement thereto by IMS and the underwriters, if any, in connection with
    the offering and sale of the Registrable Securities covered by the
    Prospectus and any amendment or supplement thereto;

        (k) prior to any offering of Registrable Securities pursuant to any
    Registration Statement, (i) TriZetto shall register or qualify or cooperate
    with IMS and its or their counsel in connection with the registration or
    qualification of such Registrable Securities for offer and sale under the
    securities or "blue sky" laws of such jurisdictions of or within the United
    States of America as IMS or any underwriter reasonably requests in writing,
    (ii) keep such registrations or qualifications in effect and comply with
    such laws so as to permit the continuance of offers and sales in such
    jurisdictions for so long as may be necessary to enable IMS or the managing
    underwriters, if any, to complete its distribution of Registrable Securities
    pursuant to a Registration Statement, and (iii) take any and all other
    actions necessary or advisable to enable the disposition in such
    jurisdictions of the Registrable Securities covered by the Registration
    Statement; PROVIDED, HOWEVER, that in no event shall TriZetto be obligated
    to (i) qualify as a foreign corporation or as a dealer in securities in any
    jurisdiction where it would not otherwise be required to so qualify but for
    this Section 4(k) or (ii) file any general consent to service of process in
    any such jurisdiction where it is not as of the date hereof so subject;

                                      D-7
<PAGE>
        (l) cooperate with IMS and the managing underwriters, if any, to
    facilitate the timely preparation and delivery of certificates representing
    Registrable Securities to be sold pursuant to the Registration Statement,
    which certificates, if so required by any securities exchange upon which any
    Registrable Securities are listed, shall be penned, lithographed or
    engraved, or produced by any combination of such methods, on steel engraved
    borders, and which certificates shall be free of any restrictive legends and
    in such denominations and registered in such names as IMS or the managing
    underwriters may request at least two business days prior to the sale of
    Registrable Securities pursuant to the Registration Statement;

        (m) use its reasonable best efforts to cause the Registrable Securities
    covered by the applicable Registration Statement to be registered with or
    approved by such other governmental agencies or authorities of or within the
    United States of America as may be necessary to enable IMS or the managing
    underwriters, if any, to consummate the disposition of such Registrable
    Securities;

        (n) if any fact contemplated by Section 4(e)(5) above shall exist,
    promptly prepare a supplement or post-effective amendment to the
    Registration Statement or the related Prospectus or any document
    incorporated therein by reference or file any other required document so
    that, as thereafter delivered to the purchasers of the Registrable
    Securities, the Prospectus will not contain an untrue statement of a
    material fact or omit to state a material fact required to be stated therein
    or necessary to make the statements therein not misleading; PROVIDED,
    HOWEVER, if the Board of Directors of TriZetto provides written notice to
    IMS that it has determined that it is advisable to disclose in the
    Registration Statement material non-public information, the disclosure of
    which TriZetto's Board of Directors believes would be materially harmful to
    TriZetto and its stockholders at that time, TriZetto shall not be required
    to prepare and file such amendment, supplement or document for such period
    as the Board of Directors of TriZetto believes such disclosure would be
    materially harmful to TriZetto; PROVIDED that such period shall be no more
    than sixty calendar days. If TriZetto notifies IMS of the occurrence of any
    event contemplated by Section 4(e)(5) above, IMS agrees, as a consequence of
    the inclusion of any of IMS's Registrable Securities in the Registration
    Statement, to suspend the use of the Prospectus until the requisite changes
    to the Prospectus have been made;

        (o) use all reasonable best efforts to cause the Registrable Securities
    covered by the Registration Statement to be listed for quotation on the
    Nasdaq National Market or other stock exchange or trading system on which
    the Registrable Securities primarily trade on or prior to the Effective Time
    of the Registration Statement;

        (p) enter into such agreements (including an underwriting agreement in
    form, scope and substance as is customary in underwritten offerings) and
    take all such other actions in connection therewith as may be reasonably
    requested by IMS and the managing underwriters, if any, in order to expedite
    or facilitate the disposition of such Registrable Securities and in such
    connection, whether or not an underwriting agreement is entered into and
    whether or not the registration is an underwritten registration:

           (1) make such representations and warranties to IMS and the
       underwriters, if any, in form, substance and scope as are customarily
       made by issuers to underwriters in underwritten offerings;

           (2) obtain opinions of counsel to TriZetto and bring-downs of such
       opinions, which counsel shall be reasonably satisfactory to IMS and to
       the managing underwriters, if any, and which opinions (in form, scope and
       substance) shall be customary and shall be reasonably satisfactory to IMS
       and to the managing underwriters, if any, and addressed to IMS and the
       underwriters, if any, covering: (i) in the case of an underwritten
       offering, the matters customarily covered in opinions requested in
       underwritten offerings and such other matters as

                                      D-8
<PAGE>
       may be reasonably requested by IMS and the underwriters (it being agreed
       that the matters to be covered shall include, without limitation, as of
       the date of the opinion and as of the Effective Time of the Registration
       Statement or most recent post-effective amendment thereto, as the case
       may be, a statement as to, to the knowledge of such counsel, the absence
       from the Registration Statement and the Prospectus, including the
       documents incorporated by reference therein, of an untrue statement of a
       material fact or the omission of a material fact required to be stated
       therein or necessary to make the statements therein not misleading), and
       (ii) in the case of offerings not involving an underwriter, the matters
       customarily covered in opinions requested in the type of offering
       involved, and, in the case of (i) or (ii), stating that the Registration
       Statement complies, as to form, with the requirements of the Securities
       Act;

           (3) to the extent permitted by the rules of the AICPA, obtain "cold
       comfort" letters and updates thereof from the independent public
       accountants of TriZetto (and, if necessary, from the independent public
       accountants of any Subsidiary of TriZetto or of any business acquired by
       TriZetto for which financial statements and financial data are, or are
       required to be, included in the Registration Statement) addressed to IMS
       and the underwriters, if any, such letters to be in customary form and
       covering matters of the type customarily covered in "cold comfort"
       letters by underwriters in connection with underwritten offerings;

           (4) if an underwriting agreement is entered into, the same shall set
       forth customary indemnification and contribution provisions and
       procedures; PROVIDED, that such provisions and procedures shall be at
       least as favorable to IMS in every material respect as the provisions of
       Section 6 hereof; and

           (5) TriZetto shall deliver such documents and certificates as may be
       reasonably requested by IMS and the managing underwriters, if any, to
       evidence the continued validity of the representations and warranties
       made pursuant to Section 4(p)(1) above and to evidence compliance with
       any conditions contained in the underwriting agreement or other agreement
       entered into by TriZetto.

    The above shall be done at each closing under such underwriting or similar
    agreement or as and to the extent required thereunder;

        (q) make available for inspection by IMS and any underwriter
    participating in any disposition pursuant to such Registration Statement,
    and any attorney or accountant retained by IMS or such underwriter, all
    pertinent financial and other records, pertinent corporate documents and
    properties of TriZetto and its Subsidiaries, cause the officers, directors,
    agents and employees of TriZetto and its Subsidiaries to supply all
    information in each case reasonably requested by IMS or any such
    underwriter, attorney or accountant in connection with the Registration
    Statement, provide IMS and any such underwriter, attorney or accountant with
    opportunities to discuss the business of TriZetto and its Subsidiaries with
    TriZetto's officers and provide IMS and any such underwriter, attorney or
    accountant with opportunities to discuss the business of TriZetto and its
    Subsidiaries with the independent public accountants who have certified
    TriZetto's most recent annual financial statements in each case, as is
    customary for similar due diligence investigations; PROVIDED that any
    records, information or documents that are designated in writing by
    TriZetto, in good faith, as confidential shall be kept confidential by such
    Persons unless disclosure is made in connection with a court proceeding or
    required by law, or such records, information or documents become available
    to the public generally or through a third party without an accompanying
    obligation of confidentiality; and PROVIDED FURTHER that, if the foregoing
    inspection and information gathering would otherwise disrupt TriZetto's
    conduct of its business, such inspection and information gathering shall, to
    the greatest extent possible, be coordinated on behalf of IMS and the other
    parties entitled thereto by one counsel designated by and on behalf of IMS
    and other

                                      D-9
<PAGE>
    parties; and, PROVIDED, FURTHER, that nothing herein shall require any
    waiver by TriZetto of any attorney-client privilege;

        (r) otherwise use its reasonable best efforts to comply with all
    applicable rules and regulations of the SEC, and make generally available to
    its securityholders as soon as practicable, but in any event not later than
    eighteen months after the effective date of the Registration Statement (as
    defined in Rule 158(c) under the Securities Act), an earnings statement of
    TriZetto and its Subsidiaries complying with Section 11(a) of the Securities
    Act and the rules and regulations of the SEC thereunder (including, at the
    option of TriZetto, Rule 158);

        (s) in the event that any broker-dealer registered under the Exchange
    Act shall be an "affiliate" (as defined in Rule 2720(b)(1) of the NASD Rules
    (or any successor provision thereto)) of TriZetto or has a "conflict of
    interest" (as defined in Rule 2720(b)(7) of the NASD Rules (or any successor
    provision thereto)) and such broker-dealer shall underwrite, participate as
    a member of an underwriting syndicate or selling group or assist in the
    distribution of any Registrable Securities covered by a Registration
    Statement, whether as a holder of such Registrable Securities or as an
    underwriter, a placement or sales agent or a broker or dealer in respect
    thereof, or otherwise, TriZetto shall assist such broker-dealer in complying
    with the requirements of the NASD Rules, including, without limitation, by
    (A) engaging a "qualified independent underwriter" (as defined in
    Rule 2720(b)(15) of the NASD Rules (or any successor provision thereto)) to
    participate in the preparation of the registration statement relating to
    such Registrable Securities, to exercise usual standards of due diligence in
    respect thereto and to recommend the public offering price of such
    Registrable Securities, (B) indemnifying such qualified independent
    underwriter to the extent of the indemnification of underwriters provided in
    Section 6 hereof, and (C) providing such information to such broker-dealer
    as may reasonably be required in order for such broker-dealer to comply with
    the requirements of the NASD Rules;

        (t) use its reasonable efforts to assist IMS and the underwriters, if
    any, in marketing the Registrable Securities, including causing its
    executive officers to participate in such "road show" presentations and
    conference calls as may be customary in the marketing of equity securities;
    PROVIDED, HOWEVER, that IMS shall cause the managing underwriters or
    placement agents of any Securities to give such executives reasonable
    advance notice concerning the scheduling of any such presentation or call;
    PROVIDED, FURTHER, that such presentations and conference calls shall be
    scheduled with the understanding that the regular responsibilities of such
    executive officers will take priority over any such activities; and

        (u) take all other steps reasonably necessary to effect the
    registration, offering and sale of the Registrable Securities covered by the
    Registration Statement contemplated hereby.

    TriZetto may require IMS to furnish to TriZetto such information regarding
IMS and the distribution of such securities as is required to be disclosed in
the Registration Statement.

    IMS agrees by acquisition of such Registrable Securities that, upon receipt
of any notice from TriZetto of the happening of any event of the kind described
in Section 4(e)(5) hereof, IMS will forthwith discontinue disposition of
Registrable Securities pursuant to the Registration Statement until IMS's
receipt of the copies of the supplemented or amended Prospectus contemplated by
Section 4(n) hereof, or until it is advised in writing by TriZetto that the use
of the Prospectus may be resumed, and has received copies of any additional or
supplemental filings which are incorporated by reference in the Prospectus, and,
if so directed by TriZetto, IMS will deliver to TriZetto (at TriZetto's expense)
all copies, other than permanent file copies then in IMS's possession, of the
Prospectus covering such Registrable Securities current at the time of receipt
of such notice; PROVIDED that nothing in this paragraph shall prohibit or
restrict IMS from effecting sales or transfers otherwise than under a
Registration Statement. In the event TriZetto shall give any such notice, the
time periods mentioned in Section 2(c) hereof shall be extended by the number of
days during the period from and including the

                                      D-10
<PAGE>
date of the giving of such notice to and including the date when IMS either
receives the copies of the supplemented or amended prospectus contemplated by
Section 4(n) hereof or is advised in writing by TriZetto that the use of the
Prospectus may be resumed.

    5.  REGISTRATION EXPENSES.

        (a) All expenses incident to TriZetto's performance of, or compliance,
    with this Agreement, including without limitation:

           (1) all registration and filing fees (including with respect to
       filings required to be made with the National Association of Securities
       Dealers);

           (2) fees and expenses of compliance with securities or blue sky laws
       of or within the United States of America (including reasonable fees and
       disbursements of counsel for the underwriters or selling holders in
       connection with blue sky qualifications of the Registrable Securities and
       determination of their eligibility for investment under the laws of such
       jurisdictions as the managing underwriters or IMS may designate);

           (3) printing, messenger, telephone, delivery, distribution and
       reproduction expenses;

           (4) fees and disbursements of counsel for TriZetto (including the
       expenses of any opinions required by or incident to such performance);

           (5) fees and disbursements of all independent certified public
       accountants of TriZetto (including the expenses of any special audit and
       "cold comfort" letters required by or incident to such performance);

           (6) fees and disbursements of underwriters (excluding discounts,
       commissions or fees of underwriters, selling brokers, dealer managers or
       similar securities industry professionals relating to the distribution of
       the Registrable Securities or legal expenses of any person other than
       TriZetto); and

           (7) fees and expenses of other Persons retained by TriZetto

(all such expenses being, herein called "REGISTRATION EXPENSES") will be borne
by TriZetto, regardless whether the Registration Statement becomes effective.

    To the extent that any Registration Expenses are reasonably incurred,
assumed or paid by IMS or any underwriter, TriZetto shall reimburse such Person
for the full amount of the Registration Expenses so incurred, assumed or paid
promptly after receipt of a written request therefor, which shall specify in
reasonable detail the nature and amount of the Registration Expenses.

    TriZetto will, in any event, pay its internal expenses (including, without
limitation, all salaries and expenses of its officers and employees performing
legal or accounting duties), the expense of any annual audit, rating agency
fees, the fees and expenses incurred in connection with the listing of the
securities to be registered on each securities exchange on which similar
securities issued by TriZetto are then listed and the fees and expenses of any
Person, including special experts, retained by TriZetto.

        (b) In connection with each Registration Statement required hereunder,
    TriZetto shall not be responsible for the payment of any transfer taxes
    relating to the sale or disposition of the Registrable Securities by IMS or
    for any underwriting discounts and commissions attributable to the sale of
    Registrable Securities by or on behalf of IMS.

    6.  INDEMNIFICATION.

        (a)  INDEMNIFICATION BY TRIZETTO.  In the event of any registration of
    securities of TriZetto under the Securities Act, TriZetto shall indemnify
    and hold harmless (i) in the case of any registration of Registrable
    Securities hereunder, IMS and each underwriter, selling agent or other

                                      D-11
<PAGE>
    securities professional, if any, which facilitates the disposition of
    Registrable Securities, and each of their respective officers and directors
    and each Person who controls IMS or such underwriter, selling agent or other
    securities professional within the meaning of Section 15 of the Securities
    Act or Section 20 of the Exchange Act, and (ii) in the case of any
    registration statement of TriZetto, IMS, its directors and officers and each
    Person who controls IMS within the meaning of Section 15 of the Securities
    Act or Section 20 of the Exchange Act (each such person being sometimes
    referred to as an "INDEMNIFIED PERSON") against any losses, claims, damages
    or liabilities, joint or several, to which such Indemnified Person may
    become subject under the Securities Act or otherwise, insofar as such
    losses, claims, damages or liabilities (or actions in respect thereof) arise
    out of or are based upon (x) an untrue statement or alleged untrue statement
    of a material fact contained in any Registration Statement under which such
    Registrable Securities are to be registered under the Securities Act, or any
    Prospectus contained therein or furnished by TriZetto to any Indemnified
    Person, or any amendment or supplement thereto, or (y) the omission or
    alleged omission to state therein a material fact required to be stated
    therein or necessary to make the statements therein not misleading or
    (z) the failure of TriZetto to comply with applicable law or the breach by
    TriZetto of this Agreement, and TriZetto hereby agrees to reimburse such
    Indemnified Person for any legal or other expenses reasonably incurred by
    them in connection with investigating or defending any such action or claim
    as such expenses are incurred; PROVIDED, HOWEVER, that TriZetto shall not be
    liable to any such Indemnified Person in any such case to the extent that
    any such loss, claim, damage or liability arises out of or is based upon an
    untrue statement or alleged untrue statement or omission or alleged omission
    made in such Registration Statement or Prospectus, or amendment or
    supplement, in reliance upon and in conformity with written information
    furnished to TriZetto by such Indemnified Person expressly for use therein;
    PROVIDED FURTHER, HOWEVER, that the indemnification obligations hereunder
    with respect to any preliminary prospectus shall not inure to the benefit of
    any underwriter, selling agent or other securities professional from whom
    the person asserting any such losses, liabilities, claims, damages or
    expenses purchased any securities, or any person controlling such
    underwriter, selling agent or other securities professional, if a copy of
    the final prospectus (as then amended or supplemented if TriZetto shall have
    furnished any such amendments or supplements thereto) was not sent or given
    by or on behalf of such underwriter, selling agent or other securities
    professional to such person, if such is required by law, at or prior to
    written confirmation of the sale of such security to such person, and if the
    final prospectus (as so amended or supplemented) would have corrected the
    defect and given rise to such loss, liability, claim, damage or expense.

        (b)  INDEMNIFICATION BY IMS AND ANY UNDERWRITERS.  IMS agrees, as a
    consequence of the inclusion of any of IMS's Registrable Securities in such
    Registration Statement, and each underwriter, selling agent or other
    securities professional, if any, which facilitates the disposition of
    Registrable Securities shall agree, as a consequence of facilitating such
    disposition of Registrable Securities, severally and not jointly, to
    (i) indemnify and hold harmless TriZetto, its directors, officers who sign
    the registration statement and each person, if any, who controls TriZetto
    within the meaning of either Section 15 of the Securities Act or Section 20
    of the Exchange Act, against any losses, claims, damages or liabilities to
    which TriZetto or such other persons may become subject, under the
    Securities Act or otherwise, insofar as such losses, claims, damages or
    liabilities (or actions in respect thereof) arise out of or are based upon
    (x) an untrue statement or alleged untrue statement of a material fact
    contained in such Registration Statement or Prospectus, or any amendment or
    supplement, (y) the omission or alleged omission to state therein a material
    fact required to be stated therein or necessary to make the statements
    therein not misleading, in each case to the extent, but only to the extent,
    that such untrue statement or alleged untrue statement or omission or
    alleged omission was made in reliance upon and in conformity with written
    information furnished to TriZetto by IMS or such underwriter, selling agent
    or other securities professional expressly for use therein, or (z) the
    failure of IMS to comply with applicable law or

                                      D-12
<PAGE>
    the breach by IMS of this Agreement, and (ii) reimburse TriZetto for any
    legal or other expenses reasonably incurred by TriZetto in connection with
    investigating or defending any such action or claim as such expenses are
    incurred.

        (c)  NOTICES OF CLAIMS, ETC.  Promptly after receipt by an indemnified
    party under subsection (a) or (b) above of notice of the commencement of any
    action, such indemnified party shall, if a claim in respect thereof is to be
    made against an indemnifying party under this Section 6, notify such
    indemnifying party in writing of the commencement thereof; but the omission
    so to notify the indemnifying party shall not relieve it from any liability
    which it may have to any indemnified party otherwise than under this
    Section 6, except to the extent the indemnifying party is prejudiced by the
    omission. In case any such action shall be brought against any indemnified
    party and it shall notify an indemnifying party of the commencement thereof,
    such indemnifying party shall be entitled to participate therein and, to the
    extent that it shall wish, jointly with any other indemnifying party
    similarly notified, to assume the defense thereof, with counsel reasonably
    satisfactory to such indemnified party, and, after notice from the
    indemnifying party to such indemnified party of its election so to assume
    the defense thereof, such indemnifying party shall not be liable to such
    indemnified party under this Section 6 for any legal expenses of other
    counsel or any other expenses, in each case subsequently incurred by such
    indemnified party, in connection with the defense thereof other than
    reasonable costs of investigation. No indemnifying party shall, without the
    written consent of the indemnified party, effect the settlement or
    compromise of, or consent to the entry of any judgment with respect to, any
    pending or threatened action or claim in respect of which indemnification or
    contribution may be sought hereunder (to the extent that the indemnified
    party is an actual or reasonably likely potential party to such action or
    claim) unless such settlement, compromise or judgment (i) includes an
    unconditional release of the indemnified party from all liability arising
    out of such action or claim and (ii) does not include a statement as to, or
    an admission of, fault, culpability or a failure to act, by or on behalf of
    any indemnified party.

        (d)  CONTRIBUTION.  If the indemnification provided for in this
    Section 6 is unavailable to or insufficient to hold harmless an indemnified
    party under subsection (a) or (b) above in respect of any losses, claims,
    damages or liabilities (or actions in respect thereof) referred to therein,
    then each indemnifying party shall contribute to the amount paid or payable
    by such indemnified party as a result of such losses, claims, damages or
    liabilities (or actions in respect thereof) in such proportion as is
    appropriate to reflect the relative fault of the indemnifying party and the
    indemnified party in connection with the statements or omissions which
    resulted in such losses, claims, damages or liabilities (or actions in
    respect thereof), as well as any other relevant equitable considerations.
    The relative fault of such indemnifying party and indemnified party shall be
    determined by reference to, among other things, whether the untrue or
    alleged untrue statement of a material fact or omission or alleged omission
    to state a material fact relates to information supplied by such
    indemnifying party or by such indemnified party, and the parties' relative
    intent, knowledge, access to information and opportunity to correct or
    prevent such statement or omission. The parties hereto agree that it would
    not be just and equitable if contribution pursuant to this Section 6(d) were
    determined by pro rata allocation (even if IMS or any underwriters, selling
    agents or other securities professionals or all of them were treated as one
    entity for such purpose) or by any other method of allocation which does not
    take account of the equitable considerations referred to in this
    Section 6(d). The amount paid or payable by an indemnified party as a result
    of the losses, claims, damages or liabilities (or actions in respect
    thereof) referred to above shall be deemed to include any legal or other
    fees or expenses reasonably incurred by such indemnified party in connection
    with investigating or defending any such action or claim. No person guilty
    of fraudulent misrepresentation (within the meaning of Section 11(f) of the
    Securities Act) shall be entitled to contribution from any person who was
    not guilty of such fraudulent misrepresentation. The obligations of IMS and
    any underwriters, selling agents or other securities

                                      D-13
<PAGE>
    professionals in this Section 6(d) to contribute shall be several in
    proportion to the percentage of Registrable Securities registered or
    underwritten, as the case may be, by them and not joint.

        (e) Notwithstanding any other provision of this Section 6, in no event
    will (i) IMS be required to undertake liability to any person under this
    Section 6 for any amounts in excess of the dollar amount of the proceeds to
    be received by IMS from the sale of its Registrable Securities (after
    deducting any fees, discounts and commissions applicable thereto) pursuant
    to any Registration Statement under which such Registrable Securities are to
    be registered under the Securities Act, or (ii) any underwriter, selling
    agent or other securities professional be required to undertake liability to
    any person hereunder for any amounts in excess of the discount, commission
    or other compensation payable to such underwriter, selling agent or other
    securities professional with respect to the Registrable Securities
    underwritten by it and distributed to the public.

        (f) The obligations of TriZetto under this Section 6 shall be in
    addition to any liability which TriZetto may otherwise have to any
    Indemnified Person and the obligations of any Indemnified Person under this
    Section 6 shall be in addition to any liability which such Indemnified
    Person may otherwise have to TriZetto. The remedies provided in this
    Section 6 are not exclusive and shall not limit any rights or remedies which
    may otherwise be available to an indemnified party at law or in equity.

    7.  RULE 144.

        (a) TriZetto covenants that it will use its reasonable best efforts to
    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 (or, if TriZetto is not required to file such reports, it will,
    upon the request of IMS make publicly available such information as
    necessary to permit sales pursuant to Rule 144 under the Securities Act),
    and it will take such further action as IMS may reasonably request, all to
    the extent required from time to time to enable IMS to sell Registrable
    Securities 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, including providing any legal
    opinions as to the exemptions under Rule 144. Upon the request of IMS
    TriZetto will deliver to IMS a written statement as to whether it has
    complied with such information and requirements.

        (b) A security ceases to be a Restricted Security when IMS is permitted
    to sell such security to the public without restriction pursuant to
    Rule 144(k) (or any similar provisions then in force). The determination as
    to whether IMS is permitted to sell such security to the public without
    restriction pursuant to Rule 144(k) (including, without limitation, the
    determination as to whether IMS is an "affiliate" of TriZetto, as such term
    is used in Rule 144), shall be made promptly and in good faith by counsel to
    IMS and counsel to TriZetto at such time as IMS seeks to sell such security
    to the public pursuant to Rule 144(k).

    8.  APPROVAL FOR LISTING.

    Promptly after the date hereof and after any subsequent increase in the
number of Registrable Securities, TriZetto shall take all necessary action to
cause all of the Registrable Securities to be approved for listing, subject to
official notice of issuance, on the Nasdaq National Market or other securities
exchange or dealer quotation system on which the TriZetto Common Stock may then
be listed or authorized for quotation.

    9.  TERM OF REGISTRATION RIGHTS.

    The rights of IMS with respect to the registration rights granted pursuant
to this Agreement shall remain in effect, subject to the terms hereof, until the
earlier of (i) ten (10) years after the Closing

                                      D-14
<PAGE>
Date and (ii) the date on which there are no Registrable Securities or
securities which are convertible or exchangeable for Registrable Securities
issued and outstanding.

    10.  FURTHER AGREEMENTS.

    (a) TriZetto will not file any registration statement under the Securities
Act unless it shall first have given to IMS for so long as IMS owns beneficially
(as such term is defined in the Exchange Act) 10% or more of the TriZetto Common
Stock outstanding or is otherwise deemed to be a control person under the
Securities Act, at least 10 days' prior written notice thereof and, if so
requested by IMS within 10 days after such notice, IMS shall have the right, at
any time when, in the reasonable judgment of IMS IMS is or might be deemed a
controlling person of TriZetto within the meaning of the Securities Act, (a) to
participate in the preparation and filing of each such registration statement at
the sole cost and expense of IMS and (b) to receive signed copies of the
documents specified in Section 4 hereof addressed to IMS. If any such
registration statement refers to IMS by name or otherwise as the holder of any
securities of TriZetto, then IMS shall have the right (in addition to any other
rights it may have under this Agreement) to require, in the event that such
reference to IMS by name or otherwise is not required by the Securities Act or
any rules and regulations promulgated thereunder, the deletion of the references
to IMS.

    11.  MISCELLANEOUS.

    (a)  REMEDIES.  IMS, in addition to being entitled to exercise all rights
provided herein and granted by law, including recovery of damages, will be
entitled to specific performance of its rights under this Agreement. TriZetto
agrees that monetary damages would not be adequate compensation for any loss
incurred by reason of a breach by it of the provisions of this Agreement and
hereby agrees to waive the defense in any action for specific performance that a
remedy at law would be adequate.

    (b)  REGISTRATION RIGHTS OF OTHER PERSONS.  TriZetto may grant to any Person
other than IMS the right to request a registration of securities of TriZetto
under the Securities Act or the right to be included as a selling stockholder in
connection with any registration of Registrable Securities; PROVIDED, HOWEVER,
that the granting of any such rights shall not conflict with or otherwise alter
any rights granted to IMS hereunder. TriZetto hereby represents and warrants to
IMS that it has obtained the consents or approvals of the Venture Capitalists
necessary to enter into this Agreement and to grant IMS its rights hereunder.

    (c)  ADJUSTMENTS AFFECTING REGISTRABLE SECURITIES.  TriZetto will not
intentionally take any action, or permit any change to occur, with respect to
the Registrable Securities which would (i) adversely affect the ability of IMS
to include such Registrable Securities in a registration undertaken pursuant to
this Agreement or (ii) adversely affect the marketability of such Registrable
Securities in any such registration.

    (d)  AMENDMENTS AND WAIVERS.  This Agreement, including this Section 11(d),
may be amended, and waivers or consents to departures from the provisions hereof
may be given, only by a written instrument duly executed by TriZetto and IMS.
Each holder of Registrable Securities outstanding at the time of any such
amendment, waiver or consent or thereafter shall be bound by any amendment,
waiver or consent effected pursuant to this Section 11(d), whether or not any
notice, writing or marking indicating such amendment, waiver or consent appears
on the Registrable Securities or is delivered to such holder.

                                      D-15
<PAGE>
    (e)  NOTICES.  All notices and other communications provided for or
permitted hereunder shall be made in writing by hand-delivery, registered
first-class mail, telex, telecopier, or air courier guaranteeing overnight
delivery

<TABLE>
<S>                   <C>
if to IMS:            IMS Health Incorporated
                      200 Nyala Farms
                      Westport, Connecticut 06880
                      Attention: Chief Executive Officer
                      Telecopy: (203) 222-4247

with copies to:       IMS Health Incorporated
                      200 Nyala Farms
                      Westport, Connecticut 06880
                      Attention: David Stevens
                               Jared Finkelstein
                      Telecopy: (203) 222-4268

and to:               Sullivan & Cromwell
                      125 Broad Street
                      New York, New York 10004
                      Attention: Alan J. Sinsheimer
                               Keith A. Pagnani
                      Telecopy: (212) 558-3588

if to TriZetto:       The TriZetto Group, Inc.
                      567 San Nicolas Drive, Suite 367
                      Newport Beach, California 92660
                      Attention: Christine A. Miller
                      Telecopy: (949) 219-2197

and to:               Stradling Yocca Carlson & Rauth
                      660 Newport Center Drive, Suite 1600
                      Newport Beach, CA 92660-6422
                      Attention: K.C. Schaaf
                               Michael E. Flynn
                      Telecopy: (949) 725-4100
</TABLE>

    and thereafter at such other address, notice of which is given in accordance
    with the provisions of this Section 11(e).

        All such notices and communications shall be deemed to have been duly
    given: at the time delivered by hand, if personally delivered; five business
    days after being deposited in the mail, postage prepaid, if mailed; when
    answered back, if telexed; when receipt acknowledged, if telecopied; and on
    the next business day, if timely delivered to an air courier guaranteeing
    overnight delivery.

    (f)  PARTIES IN INTEREST; BENEFITS OF REGISTRATION RIGHTS.  The parties to
this Agreement intend that IMS shall be entitled to receive the benefits of this
Agreement and that IMS shall be bound by the terms and provisions of this
Agreement by reason of its election with respect to the Registrable Securities
which are included in a Registration Statement. All the terms and provisions of
this Agreement shall be binding upon, shall inure to the benefit of and shall be
enforceable by the respective successors and assigns of the parties hereto. In
the event that any transferee(s) of IMS shall acquire at least 10% of the
Registrable Securities in accordance with this Agreement and the Stockholder
Agreement dated concurrently herewith, in any manner, whether by gift, bequest,
purchase,

                                      D-16
<PAGE>
operation of law or otherwise, IMS and such transferee(s) may, without any
further writing or action of any kind, jointly exercise the registration rights
hereunder in such manner and in such proportion as IMS shall determine and, if
such transferee jointly exercises such registration rights with IMS hereunder,
such transferee shall be conclusively deemed to have agreed to be bound by and
to perform all of the terms and provisions of this Agreement to the aforesaid
extent.

    (g)  COUNTERPARTS.  This Agreement may be executed in any number of
counterparts and by the parties hereto in separate counterparts, each of which
when so executed shall be deemed to be an original and all of which taken
together shall constitute one and the same agreement.

    (h)  HEADINGS.  The headings in this Agreement are for convenience of
reference only and shall not limit or otherwise affect the meaning hereof.

    (i)  GOVERNING LAW.  This Agreement shall be governed by and construed in
accordance with the laws of the State of Delaware, without giving effect to any
provisions relating to conflicts of laws.

    (j)  SEVERABILITY.  In the event that any one or more of the provisions
contained herein, or the application thereof in any circumstances, is held
invalid, illegal or unenforceable in any respect for any reason, the validity,
legality and enforceability of any such provision in every other respect and of
the remaining provisions hereof shall not be in any way impaired or affected
thereby, it being intended that all of the rights and privileges of the parties
hereto shall be enforceable to the fullest extent permitted by law.

    (k)  SURVIVAL.  The respective indemnities, agreements, representations,
warranties and other provisions set forth in this Agreement or made pursuant
hereto shall remain in full force and effect, regardless of any investigation
(or any statement as to the results thereof) made by or on behalf of IMS, any
director or officer of IMS, any agent or underwriter, any director, officer or
partner of such agent or underwriter, or any controlling person of any of the
foregoing, and shall survive the transfer and registration of the Registrable
Securities of IMS.

    (l)  ENTIRE AGREEMENT.  This Agreement is intended by the parties as a final
expression of their agreement and intended to be a complete and exclusive
statement of the agreement and understanding of the parties hereto in respect of
the subject matter contained herein. There are no restrictions, promises,
warranties or undertakings, other than those set forth or referred to herein
with respect to the registration rights granted by TriZetto with respect to the
Registrable Securities. This Agreement supersedes all prior agreements and
understandings between the parties with respect to such subject matter.

                                      D-17
<PAGE>
    IN WITNESS WHEREOF, the parties have executed this Agreement as of the date
first written above.

<TABLE>
<S>                                                    <C>  <C>
                                                       THE TRIZETTO GROUP, INC.

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

                                                       IMS HEALTH INCORPORATED

                                                       By:
                                                            -----------------------------------------
                                                            Name:
                                                            Title:
</TABLE>

                                      D-18
<PAGE>
                                                                      APPENDIX E

                             STOCKHOLDER AGREEMENT

    THIS STOCKHOLDER AGREEMENT (this "AGREEMENT") is entered into as of
            , 2000, by and between The TriZetto Group, Inc., a Delaware
corporation ("TRIZETTO"), and IMS Health Incorporated, a Delaware corporation
("IMS").

    WHEREAS, TriZetto, Elbejay Acquisition Corp., a Delaware corporation and a
wholly-owned subsidiary of TriZetto ("MERGER SUB"), IMS and ERISCO Managed Care
Technologies, Inc., a New York corporation and wholly owned subsidiary of IMS
("ERISCO"), have entered into an Agreement and Plan of Reorganization, dated as
of May   , 2000 (the "MERGER AGREEMENT"), providing for, among other things, the
merger of Erisco with and into Merger Sub (the "MERGER");

    WHEREAS, the respective boards of directors of each of TriZetto and IMS have
approved this Agreement;

    WHEREAS, in connection with the Merger, TriZetto will issue shares of
capital stock of TriZetto to IMS;

    WHEREAS, concurrently with the execution and delivery of this Agreement, the
parties hereto are entering into a Registration Rights Agreement (the
"REGISTRATION RIGHTS AGREEMENT") with respect to the shares of capital stock of
TriZetto to be issued to IMS in connection with the Merger;

    WHEREAS, the execution and delivery of this Agreement by the parties hereto
is a condition to the consummation of the Merger; and

    WHEREAS, the parties hereto desire to make certain representations,
warranties, covenants and agreements as provided in this Agreement.

    NOW, THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties hereto agree as
follows:

    1.  CERTAIN DEFINITIONS.  (a) Capitalized terms that are used but not
otherwise defined herein shall have the meanings given to them in the Merger
Agreement.

        (b) For the purposes of this Agreement, the following terms shall have
    the following meanings:

    "AFFILIATE" and "ASSOCIATE" when used with reference to any Person shall
have the meanings assigned to such terms in Rule 12b-2 of the Exchange Act as in
effect of the date hereof; PROVIDED, that TriZetto and its Subsidiaries and the
officers and directors of TriZetto and its Subsidiaries who are not the IMS
Director and who are not directors or officers of IMS or any of its Subsidiaries
shall not, solely as a result of holding such office of TriZetto or any of its
Subsidiaries, be deemed Affiliates or Associates of IMS for purposes of this
Agreement.

    A Person shall be deemed the "BENEFICIAL OWNER", and to have "BENEFICIAL
OWNERSHIP" of, and to "BENEFICIALLY OWN," any securities as to which such Person
is or may be deemed to be the beneficial owner pursuant to Rule 13d-3 and 13d-5
under the Exchange Act, as such rules are in effect on the date of this
Agreement, as well as any securities as to which such Person has the right to
become the Beneficial Owner (whether such right is exercisable immediately or
only after the passage of time or the occurrence of conditions) pursuant to any
agreement, arrangement or understanding (other than customary agreements with
and between underwriters and selling group members with respect to a BONA FIDE
public offering of securities), or upon the exercise of conversion rights,
exchange rights, rights, warrants or options, or otherwise; PROVIDED , HOWEVER,
that no Person shall be deemed the "Beneficial Owner" or to have "Beneficial
Ownership" of, or to "Beneficially Own," any Shares solely

                                      E-1
<PAGE>
by virtue of the rights set forth in Section 6; PROVIDED, FURTHER, that a Person
shall not be deemed the "Beneficial Owner", or to have "Beneficial Ownership"
of, or to "Beneficially Own", any Shares (i) solely because such Shares have
been tendered pursuant to a tender or exchange offer made by such Person, or any
of such Person's Affiliates or Associates, until such tendered Shares are
accepted for payment or exchange or (ii) solely because such Person, or any of
such Person's Affiliates or Associates, has or shares the power to vote or
direct the voting of such Shares pursuant to a revocable proxy given in response
to a public proxy or consent solicitation made pursuant to, and in accordance
with, the applicable rules and regulations under the Exchange Act, except if
such power (or the arrangements relating thereto) is then reportable under Item
6 of Schedule 13D under the Exchange Act (or any similar provision of a
comparable or successor report). For purposes of this Agreement, in determining
the percentage of the outstanding Shares with respect to which a Person is the
Beneficial Owner, all Shares as to which such Person is deemed the Beneficial
Owner shall be deemed outstanding.

    "BOARD" shall mean the Board of Directors of TriZetto.

    "CHANGE OF CONTROL" shall mean, with respect to any party, any transaction
or event in connection with a plan pursuant to which (i) all or substantially
all of the assets of or (ii) equity interests in such party that have the power
to cast at least 50% of the votes entitled to be cast in elections of directors
(or similar officials) of such party, shall be exchanged for, converted into or
acquired for or constitute the right to receive securities, cash or other
property (whether by means of a tender or exchange offer, reclassification,
consolidation, merger, sale or other disposition of such assets or such equity
interests, compulsory exchange of equity interests, liquidation or otherwise).
In the case of a Change in Control effected through a series of transactions or
events, such Change in Control shall be deemed to have occurred when
(i) substantially all of the assets of such party or (ii) equity interests in
such party that have the power to cast at least 50% of the votes entitled to be
cast in elections of directors (or similar officials) of such party, shall be
exchanged for, converted into or acquired for or constitute the right to receive
securities, cash or other property.

    "GROUP" shall have the meaning assigned to such term in Rule 13d-5 under the
Exchange Act as in effect on the date hereof.

    "MINIMUM SHARE PERCENTAGE" shall mean, as of any date, 10% of the
Outstanding Shares as of such date.

    "OUTSTANDING SHARES" shall mean, as of any date, the issued and outstanding
Shares as of such date, excluding any treasury Shares.

    "PERMITTED TRANSFER" shall have the meaning set forth in Section 5.

    "SHARES" shall mean TriZetto Common Stock and any other shares of common
stock of TriZetto.

    "SUBSIDIARY" shall mean, with respect to any Person, any entity at least 50%
of the Voting Securities of which are owned directly or indirectly by such
Person.

    "TRIZETTO COMMON STOCK" shall mean the Common Stock, par value $0.001 per
share, of TriZetto.

    "TRANSFER" shall mean any direct or indirect sale, transfer, assignment,
pledge, hypothecation, mortgage, or other disposition or encumbrance, provided,
that a Transfer shall not include any sale, transfer, assignment, or other
disposition by operation or succession of law, merger or otherwise.

    "VOTING SECURITIES" shall mean any securities entitled to vote in the
ordinary course in the election of directors or of Persons serving in a similar
governing capacity of any partnership, limited liability company or other
entity, including the voting rights attached to such securities.

                                      E-2
<PAGE>
    2.  REPRESENTATIONS OF IMS.  As of the date hereof, IMS represents and
warrants to TriZetto that:

        (a) IMS does not Beneficially Own any Shares other than those Shares to
    be issued to IMS in connection with the Merger;

        (b) IMS has all requisite corporate power and authority to enter into
    this Agreement and to perform its obligations hereunder. The execution and
    delivery of this Agreement by IMS have been duly authorized by all necessary
    corporate action on the part of IMS;

        (c) this Agreement has been duly executed and delivered by IMS and is
    the valid and binding obligation of IMS, enforceable in accordance with its
    terms, except that such enforceability may be subject to the Bankruptcy and
    Equity Exception;

        (d) no consent, approval, order or authorization of, or registration,
    declaration or filing with, any Governmental Entity is required to be
    obtained by IMS in connection with the execution and delivery of this
    Agreement, except those that have been made or obtained or where the failure
    to obtain such consents, approvals, orders, authorizations, registrations,
    declarations or filings, would not prevent IMS from performing its
    obligations under this Agreement or the Merger Agreement and is not
    reasonably likely to have a Material Adverse Effect on IMS or Erisco; and

        (e) neither the execution, delivery and performance of this Agreement
    nor the consummation of the transactions contemplated hereby nor compliance
    with the provisions hereof will conflict with, or result in any violations
    of, or cause a breach or default (with or without notice or lapse of time,
    or both) under, or give rise to a right of termination, amendment,
    cancellation or acceleration of any obligation contained in, or the loss of
    any material benefit under, or result in the creation of any lien, security
    interest, charge or encumbrance upon any of the material properties or
    assets of IMS or Erisco under, any term, condition or provision of (A) the
    certificate of incorporation or bylaws of IMS or (B) any Contract, permit,
    judgment, order, decree, statute, law, ordinance, rule or regulation
    applicable to IMS or Erisco or their respective properties or assets, other
    than any such conflicts, violations, defaults, losses, liens, security
    interests, charges, or encumbrances which, individually or in the aggregate,
    would not prevent IMS from performing its obligations under this Agreement
    or the Merger Agreement and is not reasonably likely to have a Material
    Adverse Effect on IMS or Erisco.

    3.  REPRESENTATIONS OF TRIZETTO.  As of the date hereof, TriZetto represents
and warrants to IMS that:

        (a) TriZetto has all requisite corporate power and authority to enter
    into this Agreement and to perform its obligations hereunder. The execution
    and delivery of this Agreement by TriZetto and the consummation by TriZetto
    of the transactions contemplated hereby have been duly authorized by all
    necessary corporate action on the part of TriZetto;

        (b) this Agreement has been duly executed and delivered by TriZetto and
    is the valid and binding obligation of TriZetto, enforceable in accordance
    with its terms, except that such enforceability may be subject to the
    Bankruptcy and Equity Exception;

        (c) no consent, approval, order or authorization of, or registration,
    declaration or filing with, any Governmental Entity is required to be
    obtained by TriZetto or any of the TriZetto Subsidiaries in connection with
    the execution and delivery of this Agreement or the consummation of the
    transactions contemplated hereby, except those that have been made or
    obtained or where the failure to obtain such consents, approvals, orders,
    authorizations, registrations, declarations or filings, would not prevent
    TriZetto from performing its obligations under this Agreement or the Merger
    Agreement and is not reasonably likely to have a Material Adverse Effect on
    TriZetto; and

        (d) neither the execution, delivery and performance of this Agreement
    nor the consummation of the transactions contemplated hereby nor compliance
    with the provisions hereof will conflict

                                      E-3
<PAGE>
    with, or result in any violations of, or cause a breach or default (with or
    without notice or lapse of time, or both) under, or give rise to a right of
    termination, amendment, cancellation or acceleration of any obligation
    contained in, or the loss of any material benefit under, or result in the
    creation of any lien, security interest, charge or encumbrance upon any of
    the material properties or assets of TriZetto or any of the TriZetto
    Subsidiaries under, any term, condition or provision of (A) the certificate
    or articles of incorporation or bylaws of TriZetto or any of the TriZetto
    Subsidiaries or (B) any Contract, permit, judgment, order, decree, statute,
    law, ordinance, rule or regulation applicable to TriZetto or any of the
    TriZetto Subsidiaries or their respective properties or assets, other than
    any such conflicts, violations, defaults, losses, liens, security interests,
    charges or encumbrances which, individually or in the aggregate would not
    prevent TriZetto from performing its obligations under this Agreement or the
    Merger Agreement and is not reasonably likely to have a Material Adverse
    Effect on TriZetto.

    4.  STANDSTILL PROVISIONS.

        4.1  From the date hereof until the earlier of (i) the fourth
    anniversary of the Closing Date or (ii) the date on which (A) a Change of
    Control of TriZetto shall have occurred, or (B) TriZetto shall have publicly
    announced, directly or indirectly, its willingness to consider a transaction
    that would constitute a Change of Control of TriZetto, IMS, without the
    prior written consent of TriZetto, shall not, and shall not suffer or permit
    any Subsidiaries of IMS to, whether acting alone or in concert with others:

           (a) initiate or propose any stockholder proposal or participate in
       the making of, or solicit stockholders for the approval of, one or more
       stockholder proposals relating to TriZetto;

           (b) seek the removal of any directors or a change in the composition
       or size of the Board;

           (c) form, join or participate in a Group with respect to any Shares,
       other than a Group consisting solely of IMS and Affiliates or Associates
       of IMS;

           (d) deposit any Shares into a voting trust or (except as provided in
       this Agreement) subject any Shares to any arrangement or agreement with
       respect to the voting or Transfer thereof, other than any such trust,
       arrangement or agreement (i) the only parties to or beneficiaries of
       which are IMS or any Affiliates or Associates of IMS and (ii) the terms
       of which prohibit any party thereto from acting in a manner inconsistent
       with this Agreement; PROVIDED, that all of the Shares deposited into any
       such trust or subjected to any such arrangement or agreement shall be
       deemed to be Beneficially Owned by IMS or Affiliates or Associates of IMS
       for all purposes of this Agreement;

           (e) except for Shares issued to IMS in connection with the Merger,
       acquire, offer to acquire or agree to acquire, directly or indirectly, by
       purchase, gift or otherwise, Beneficial Ownership of any Shares (the
       "STOCK LIMITATION"); or

           (f) make, or in any way participate in, directly or indirectly, any
       "solicitation" of "proxies" (as such terms are used in the rules or
       regulations of the Securities Exchange Commission) to vote, or seek to
       advise or influence any person or entity with respect to the voting of,
       any Voting Securities of TriZetto;

           (g) make any public announcement with respect to, or submit a
       proposal for, or offer of (with or without conditions), any merger,
       business combination, recapitalization, restructuring, liquidation or
       other extraordinary transaction involving TriZetto or its securities or
       assets;

           (h) take any action which might force TriZetto to make a public
       announcement regarding any of the types of matters set forth in
       paragraphs (a) through (g) above;

                                      E-4
<PAGE>
           (i) enter into discussions or arrangements with any third party with
       respect to any of the foregoing;

           (j) request publicly TriZetto or any of its Affiliates or Associates,
       directly or indirectly, to amend or waive any provision of this
       Section 4; or

           (k) advise, assist (including by knowingly providing or arranging
       financing for that purpose) or knowingly encourage, induce or attempt to
       encourage or induce any other Person to take any actions referred to in
       the foregoing paragraphs (a) through (j).

        4.2  No violation of Section 4.1(e) shall be deemed to occur as a result
    of the acquisition by IMS, or any Affiliate or Associate of IMS, of
    Beneficial Ownership of Shares in excess of the Stock Limitation (i) as a
    result of (A) any stock repurchase or similar transaction undertaken by
    TriZetto or its Affiliates that shall cause IMS's percentage ownership in
    the Shares to exceed the Stock Limitation even though the number of Shares
    Beneficially Owned by IMS and its Affiliates and Associates remains
    unchanged; (B) any acquisition of Voting Securities of another corporation
    by IMS or any Affiliate or Associate of IMS in a BONA FIDE acquisition of a
    business, the primary purpose of which is not to acquire Shares, which
    results in IMS or any such Affiliate or Associate becoming the Beneficial
    Owner of additional Shares; or (C) any stock split, stock dividend or other
    distribution relating to Shares; or (ii) in the event that TriZetto invites,
    requests or otherwise solicits IMS or any of its Affiliates or Associates to
    acquire, offer to acquire or agree to acquire, by purchase or otherwise,
    Beneficial Ownership of such Shares.

        4.3  The provisions of Section 4.1 shall apply to and be binding upon
    any Person to whom IMS Transfers Beneficial Ownership of Shares representing
    at least the Minimum Share Percentage as of the date of such Transfer. As a
    condition to any Transfer referred to in the immediately preceding sentence,
    such Transferee shall, prior to such Transfer, agree in writing to be bound
    by the provisions of this Agreement. Any such Transfer without compliance
    with the immediately preceding sentence shall be null and void and such
    transferee shall acquire no rights with respect to such Shares.

    5.  SHARE TRANSFERS.

        5.1  From the date hereof until the earlier of (i) the date two
    (2) years after the Closing Date, (ii) the date on which IMS ceases to
    Beneficially Own a number of Shares at least equal to ten percent (10%) of
    the Outstanding Shares as of the Closing Date, or (iii) the date on which a
    Change of Control of TriZetto shall have occurred (the "RESTRICTED PERIOD"),
    IMS shall not, without the prior written consent of TriZetto, Transfer any
    Shares that are Beneficially Owned by IMS, except for a Transfer that
    complies with any of the following subsections (each such Transfer, a
    "PERMITTED TRANSFER"):

           (a) a Transfer of all or any of such Shares to any Affiliate of IMS;
       PROVIDED, that contemporaneously with any such Transfer, such Affiliate
       becomes a party to a counterpart of this Agreement;

           (b) a Transfer of all or any of such Shares in a BONA FIDE pledge of
       such Shares to a financial institution to secure borrowings as permitted
       by applicable Law; PROVIDED, that contemporaneously with such pledge such
       financial institution agrees with TriZetto that upon any foreclosure on
       such pledge it, and any transferee pursuant to any disposition following
       default, shall be bound by the obligations of IMS under this Agreement;
       or

           (c) a Transfer of all or any of such Shares to any Person who has
       commenced a tender or exchange offer for Shares that the Board has
       recommended that the holders of Shares accept.

                                      E-5
<PAGE>
    6.  RIGHT OF FIRST REFUSAL

        6.1  For the period commencing upon the termination of the Restricted
    Period and continuing until the date on which IMS ceases to Beneficially Own
    a number of Shares at least equal to ten percent (10%) of the Outstanding
    Shares as of the Closing Date (the "RIGHT OF FIRST REFUSAL PERIOD") (unless
    at any time after the date of this Agreement a Change of Control of TriZetto
    shall have occurred), if IMS or any of its Affiliates propose to Transfer
    Beneficial Ownership of (i) Shares representing in the aggregate at least
    the Minimum Share Percentage as of the date of the Right of First Refusal
    Notice (as defined in Section 6.1(a)), or (ii) Shares, together with all
    other Shares Beneficially Owned by the transferee, would result in such
    transferee having in the aggregate Beneficial Ownership of at least the
    Minimum Share Percentage as of the date of the First Refusal Notice, it
    shall give TriZetto the opportunity, in the following manner, to purchase
    such Shares and shall not effect any proposed Transfer without complying
    with the following procedures:

           (a)  NOTICE; IRREVOCABLE OFFER.  IMS shall give written notice (the
       "RIGHT OF FIRST REFUSAL NOTICE") to TriZetto of its or any of its
       Affiliates' intent to Transfer such Shares, the number of Shares proposed
       to be Transferred (the "FIRST REFUSAL SHARES") and the price, the
       identity of proposed transferees, proposed payment terms and other terms
       (the "OFFER TERMS") on which IMS or such Affiliate proposes to Transfer
       such Shares. Each Right of First Refusal Notice shall constitute an
       irrevocable offer by IMS or such Affiliate to sell to TriZetto the First
       Refusal Shares on the Offer Terms and the other terms and conditions set
       forth in this Section 6.

           (b)  EXERCISE; CLOSING.  TriZetto shall have the right to purchase
       all but not less than all of the First Refusal Shares on the Offer Terms;
       PROVIDED that TriZetto shall be required to pay all consideration for the
       First Refusal Shares in cash in the event that the Offer Terms include
       any non-cash consideration. The cash payable with respect to any non-cash
       consideration shall be the fair market value of such non-cash
       consideration as mutually agreed by the parties. TriZetto may exercise
       such right by giving written notice (a "TRIZETTO ACCEPTANCE NOTICE") to
       IMS, within 20 days after the date of receipt by TriZetto of a Right of
       First Refusal Notice, which shall state that TriZetto is electing to
       purchase all of the First Refusal Shares on the Offered Terms. The
       TriZetto Acceptance Notice shall constitute an irrevocable commitment to
       purchase from IMS or such Affiliate the First Refusal Shares on the Offer
       Terms and the other terms and conditions set forth in this Section 6. The
       closing of any purchase by and sale to TriZetto of the First Refusal
       Shares shall take place, to the extent legally practicable, on such date
       that is no less than 5 and no more than 30 days following the date of the
       TriZetto Acceptance Notice, as TriZetto and IMS shall mutually agree. The
       closing shall be held at 10:00 a.m., local time, at the principal office
       of TriZetto. At such closing: (i) IMS shall deliver to TriZetto
       certificates representing the First Refusal Shares being sold (or
       affidavits of loss in lieu thereof), free and clear of any Lien;
       (ii) TriZetto shall deliver to IMS the cash consideration to be paid for
       such First Refusal Shares in accordance with this Section 6.1(b); and
       (iii) IMS and TriZetto shall execute or cause to be executed such other
       documents and take or cause to be taken such other actions as shall be
       reasonably necessary to consummate the purchase and sale of the First
       Refusal Shares on the terms contemplated by the Offer Terms and the other
       terms and conditions set forth in this Section. TriZetto and IMS each
       will pay any costs that it incurs in complying with the obligations set
       forth in this paragraph.

           (c)  NON-EXERCISE.  If TriZetto fails to elect to purchase all the
       First Refusal Shares within the 20-day time period specified in
       paragraph (b) of this Section, then IMS or such Affiliate (i) shall be
       under no obligation to sell any of the First Refusal Shares to TriZetto,
       unless IMS or such Affiliate so elects, and (ii) may, within a period of
       120 days from and after the date of the Right of First Refusal Notice,
       Transfer all or less than all of the First Refusal

                                      E-6
<PAGE>
       Shares to a proposed transferee for a price and on terms and conditions
       not materially less favorable to IMS or such Affiliate than those set
       forth in the Offer Terms.

           (d)  SUBSEQUENT APPLICATION.  If TriZetto does not elect to purchase
       all the First Refusal Shares on the Offer Terms and IMS or such Affiliate
       shall not have consummated the Transfer of all of the First Refusal
       Shares to a third party or third parties prior to the expiration of the
       120-day period specified in the foregoing paragraph (c), then the
       provisions of this Section 6 shall again apply, and IMS or such Affiliate
       shall not Transfer any of such First Refusal Shares not so Transferred
       during the Right of First Refusal Period without again complying with
       this Section.

        6.2  The obligations of IMS and its Affiliates pursuant to this
    Section 6 shall not apply to (i) any Permitted Transfer and (ii) a Transfer
    of all or any of such Shares in a BONA FIDE firm commitment public offering
    registered under the Securities Act of 1933, as amended, PROVIDED that IMS
    will use its reasonable best efforts, and will instruct the managing
    underwriters to use their reasonable best efforts, to achieve a broad public
    distribution of the Shares.

        6.3  TriZetto may assign its rights under this Section 6 if
    (i) TriZetto desires to exercise such rights and (ii) TriZetto is prohibited
    from exercising such rights under applicable Delaware law.

    7.  RIGHT OF FIRST OFFER.

        7.1  During the Right of First Refusal Period (unless at any time after
    the date of this Agreement a Change of Control of TriZetto shall have
    occurred), if IMS or any of its Affiliates proposes to Transfer Beneficial
    Ownership of any Shares, IMS or such Affiliate shall comply with the
    following procedures:

           (a)  NOTICE; CONSULTATION.  IMS or such Affiliate shall give written
       notice (the "FIRST OFFER NOTICE") to TriZetto of its intent to Transfer
       such Shares and the number of Shares proposed to be Transferred (the
       "FIRST OFFER SHARES") and, if known, the proposed transferee. For a
       period of 20 days following TriZetto's receipt of a First Offer Notice,
       IMS or such Affiliate shall discuss in good faith with TriZetto the
       possibility of effecting such a transaction with TriZetto, and during
       such 20-day period, IMS or such Affiliate shall negotiate in good faith
       and exclusively with TriZetto to determine whether it is possible to
       agree to such a transaction with TriZetto, but neither party shall be
       obligated to enter into any agreement to do so.

           (b)  TRIZETTO OFFER; ACCEPTANCE.  In the event that IMS or such
       Affiliate and TriZetto shall not have agreed on the terms of a
       transaction with respect to the First Offer Shares, TriZetto shall, at or
       prior to the conclusion of such 20-day period, deliver to IMS either
       (i) a statement of TriZetto's final offer price with respect to the First
       Offer Shares (a "TRIZETTO OFFER NOTICE"), which notice shall constitute
       an irrevocable offer by TriZetto to IMS or such Affiliate to acquire all
       of the First Offer Shares in cash at such price, or (ii) a written notice
       stating that TriZetto is not interested in making a final offer for the
       First Offer Shares (a "TRIZETTO REJECTION NOTICE"). In the event that IMS
       or such Affiliate elects to sell the First Offer Shares to TriZetto
       pursuant to the TriZetto Offer Notice, it shall provide written notice to
       such effect (an "IMS ACCEPTANCE NOTICE") to TriZetto within 2 days of
       receipt of the TriZetto Offer Notice. The closing of any purchase by and
       sale to TriZetto of the First Offer Shares shall take place, to the
       extent legally practicable, on such date that is no less than 5 and no
       more than 30 days following the date of the IMS Acceptance Notice, as
       TriZetto and IMS or such Affiliate shall mutually agree. The closing
       shall be held at 10:00 a.m., local time, at the principal office of
       TriZetto. At such closing: (i) IMS or such Affiliate shall deliver to
       TriZetto certificates representing the First Offer Shares being sold (or
       affidavits of loss in lieu thereof), free and clear of any Lien;
       (ii) TriZetto shall deliver to IMS or such Affiliate the

                                      E-7
<PAGE>
       cash consideration to be paid for such First Offer Shares in accordance
       with the TriZetto Offer Notice; and (iii) IMS or such Affiliate and
       TriZetto shall execute or cause to be executed such other documents and
       take or cause to be taken such other actions as shall be reasonably
       necessary to consummate the purchase and sale of the First Offer Shares
       on the terms contemplated by the TriZetto Offer Notice and the other
       terms and conditions set forth in this Section. TriZetto and IMS or such
       Affiliate each will pay any costs that it incurs in complying with the
       obligations set forth in this paragraph. In the event that IMS or such
       Affiliate elects not to sell the First Offer Shares to TriZetto pursuant
       to the TriZetto Offer Notice, it shall provide written notice to such
       effect (an "IMS REJECTION NOTICE") within 2 days of receipt of the
       TriZetto Offer Notice.

           (c)  TRANSFERS TO THIRD PARTIES.  In the event that the First Offer
       Shares are not acquired by TriZetto pursuant to Sections 7.1(a) or
       7.1(b), for a period of one hundred twenty (120) days from the date of
       delivery of either (i) an IMS Rejection Notice or (ii) a TriZetto
       Rejection Notice, IMS or such Affiliate shall be free to negotiate and to
       initiate and hold discussions with other potential purchasers, and to
       consummate a sale of any or all of the First Offer Shares to one or more
       third parties; PROVIDED, HOWEVER, that if TriZetto has delivered a
       TriZetto Offer Notice, the purchase price of such First Offer Shares
       payable by each such third party must be at least equal to the purchase
       price thereof set forth in such TriZetto Offer Notice, and all other
       terms and conditions shall not be materially less favorable to IMS or
       such Affiliate than those contained in the TriZetto Offer Notice;
       PROVIDED, FURTHER, that if the closing of any such purchase is subject to
       the making of any necessary filings with, the expiration of any
       applicable waiting periods imposed by, or obtaining any approvals from,
       any Governmental Entities, such purchase may be consummated at any time
       prior to 20 days after the expiration of such waiting period or the
       granting of such consent or approval, as the case may be.

           (d)  SUBSEQUENT APPLICATION.  If IMS or such Affiliate shall not have
       consummated the Transfer of all of the First Offer Shares prior to the
       expiration of the period specified in the foregoing paragraph (c), then
       the provisions of this Section 7 shall again apply, and IMS or such
       Affiliate shall not Transfer any of such Shares without again complying
       with this Section.

        7.2  The obligations of IMS and its Affiliates pursuant to this
    Section 7 shall not apply to (i) any Permitted Transfer and (ii) a Transfer
    of all or any of such Shares in a BONA FIDE firm commitment public offering
    registered under the Securities Act of 1933, as amended, PROVIDED that IMS
    will use its reasonable best efforts, and will instruct the managing
    underwriters to use their reasonable best efforts, to achieve a broad public
    distribution of the Shares.

    8.  BOARD REPRESENTATION.

        8.1  IMS DIRECTOR.  As long as IMS Beneficially Owns a number of Shares
    at least equal to ten percent (10%) of the Outstanding Shares as of the
    Closing Date, IMS shall be entitled to designate one individual (the "IMS
    DIRECTOR") to be a Class II member of the Board. In the event that IMS shall
    at any time cease to Beneficially Own a number of Shares at least equal to
    ten percent (10%) of the Outstanding Shares as of the Closing Date, IMS
    shall thenceforth not be entitled to designate an IMS Director under this
    Section 8; PROVIDED, that the IMS Director shall remain a member of the
    Board until the natural expiration of the IMS Director's term. Prior to each
    meeting of TriZetto's stockholders for the election of directors to the
    Board at which the term of the incumbent IMS Director is to expire, IMS
    shall give reasonable advance written notice to TriZetto prior to the
    mailing of the proxy statement relating to such matters requesting that
    TriZetto include, and TriZetto shall include, the IMS Director as a nominee
    for the slate of directors to be elected to the Board. IMS shall designate
    an individual reasonably acceptable to TriZetto as the IMS Director,
    PROVIDED that as long as the Chief Executive Officer ("CEO") of

                                      E-8
<PAGE>
    IMS as of the signing of the Merger Agreement is an executive officer of
    IMS, such CEO shall be the individual designated by IMS as the IMS Director.

        8.2  EFFORTS TO NOMINATE AND ELECT IMS DIRECTOR.  TriZetto shall
    nominate and use its reasonable best efforts to take and cause to be taken
    all necessary action (corporate and other) to cause the election to the
    Board of the IMS Director.

        8.3  In the event of consummation of either a transaction with, or a
    tender or exchange offer by, any of the entities listed on Schedule 8.3
    hereto or any of their respective successors or Affiliates which results in
    a Change of Control of IMS, or in the event of the acquisition of a majority
    equity interest in any of the entities listed on Schedule 8.3 or any of
    their respective successors or Affiliates by IMS, IMS's right to designate
    the IMS Director shall immediately terminate, and IMS shall cause the then
    current IMS Director to immediately resign from the Board.

    9.  MATTERS REQUIRING CONSENT OF IMS.  For so long as IMS Beneficially Owns
a number of Shares at least equal to ten percent (10%) of the Outstanding Shares
as of the Closing Date, except as set forth on Schedule 9(a) hereto, TriZetto
shall not, and shall cause its Affiliates and Associates not to, without the
prior written consent of IMS (which can be withheld for any reason), enter into,
consummate, agree to or approve any merger, consolidation, purchase or sale of
assets or equity interests, business combination or similar transaction, or any
equity-based joint venture or similar transaction, with any of the entities set
forth on Schedule 9(b) hereto; PROVIDED, HOWEVER, that such consent will not be
required if the Board of Directors of TriZetto shall have determined, after
consultation with its outside legal counsel, that TriZetto is required to enter
into, consummate, agree to or approve any such transaction pursuant to its
fiduciary duties under applicable law. In the event that IMS shall enter into,
consummate, agree to or approve any merger, consolidation, purchase or sale of
assets or equity interests, business combination or similar transaction, or any
equity-based joint venture or similar transaction, with any of the entities set
forth on Schedule 8.3 hereto, the rights of IMS pursuant to this Section 9 shall
immediately terminate.

    10.  RIGHTS AGREEMENT.  From and after the date hereof, TriZetto shall not
(i) amend or supplement the TriZetto Rights Agreement in any manner which would
adversely affect the rights of the Grandfathered Entities or (ii) adopt or
implement any other stockholder protection rights agreement or any similar plan
or arrangement unless such agreement, plan or arrangement is in no way less
favorable to the Grandfathered Entities than the TriZetto Rights Agreement.

    11.  MISCELLANEOUS.

        (a)  GOVERNING LAW AND VENUE; WAIVER OF JURY TRIAL.  The laws of the
    State of Delaware (irrespective of its choice of law principles) will govern
    the validity of this Agreement, the construction of its terms and the
    interpretation and enforcement of the rights and duties of the parties
    hereto. The parties hereby irrevocably submit to the jurisdiction of the
    courts of the State of Delaware and the Federal courts of the United States
    of America located in the State of Delaware solely in respect of the
    interpretation and enforcement of the provisions of this Agreement and of
    the documents referred to in this Agreement, and in respect of the
    transactions contemplated hereby and thereby, and hereby waive, and agree
    not to assert, as a defense in any action, suit or proceeding for the
    interpretation or enforcement hereof or of any such document, that it is not
    subject thereto or that such action, suit or proceeding may not be brought
    or is not maintainable in said courts or that the venue thereof may not be
    appropriate or that this Agreement or any such document may not be enforced
    in or by such courts, and the parties hereto irrevocably agree that all
    claims with respect to such action or proceeding shall be heard and
    determined in such a Delaware State or Federal court. The parties hereby
    consent to and grant any such court jurisdiction over the person of such
    parties and over the subject matter of such dispute and agree that mailing
    of process or other papers in connection with any such action or

                                      E-9
<PAGE>
    proceeding in the manner provided in Section 11(g) or in such other manner
    as may be permitted by law shall be valid and sufficient service thereof.
    EACH PARTY ACKNOWLEDGES AND AGREES THAT ANY CONTROVERSY WHICH MAY ARISE
    UNDER THIS AGREEMENT IS LIKELY TO INVOLVE COMPLICATED AND DIFFICULT ISSUES,
    AND THEREFORE EACH SUCH PARTY HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVES
    ANY RIGHT SUCH PARTY MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY
    LITIGATION DIRECTLY OR INDIRECTLY ARISING OUT OF OR RELATING TO THIS
    AGREEMENT, OR THE TRANSACTIONS CONTEMPLATED BY THIS AGREEMENT. EACH PARTY
    CERTIFIES AND ACKNOWLEDGES THAT (i) NO REPRESENTATIVE, AGENT OR ATTORNEY OF
    ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER
    PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING
    WAIVER, (ii) EACH PARTY UNDERSTANDS AND HAS CONSIDERED THE IMPLICATIONS OF
    THIS WAIVER, (iii) EACH PARTY MAKES THIS WAIVER VOLUNTARILY, AND (iv) EACH
    PARTY HAS BEEN INDUCED TO ENTER INTO THIS AGREEMENT BY, AMONG OTHER THINGS,
    THE MUTUAL WAIVERS AND CERTIFICATIONS IN THIS SECTION 11(a).

        (b)  ASSIGNMENT; BINDING UPON SUCCESSORS AND ASSIGNS.  Except as
    expressly set forth herein, neither party hereto may assign any of its
    rights or obligations hereunder without the prior written consent of the
    other party hereto. This Agreement will be binding upon and inure to the
    benefit of the parties hereto and their respective successors and permitted
    assigns.

        (c)  SEVERABILITY.  If any provision of this Agreement, or the
    application thereof, will for any reason and to any extent be invalid or
    unenforceable, the remainder of this Agreement and application of such
    provision to other Persons or circumstances will be interpreted so as
    reasonably to effect the intent of the parties hereto. The parties further
    agree to replace such void or unenforceable provision of this Agreement with
    a valid and enforceable provision that will achieve, to the greatest extent
    possible, the economic, business and other purposes of the void or
    unenforceable provision.

        (d)  COUNTERPARTS.  This Agreement may be executed in any number of
    counterparts, each of which will be an original as regards any party whose
    signature appears thereon and all of which together will constitute one and
    the same instrument. This Agreement will become binding when one or more
    counterparts hereof, individually or taken together, will bear the
    signatures of all the parties reflected hereon as signatories.

        (e)  OTHER REMEDIES.  Except as otherwise provided herein, any and all
    remedies herein expressly conferred upon a party will be deemed cumulative
    with and not exclusive of any other remedy conferred hereby or by law on
    such party, and the exercise of any one remedy will not preclude the
    exercise of any other.

        (f)  AMENDMENT AND WAIVERS.  Any term or provision of this Agreement may
    be amended, and the observance of any term of this Agreement may be waived
    (either generally or in a particular instance and either retroactively or
    prospectively) only by a writing signed by duly authorized officers of the
    party to be bound thereby. The waiver by a party of any breach hereof or
    default in the performance hereof will not be deemed to constitute a waiver
    of any other default or any succeeding breach or default.

        (g)  NOTICES.  All notices and other communications pursuant to this
    Agreement shall be in writing and deemed to be sufficient if contained in a
    written instrument and shall be deemed given if delivered personally, via
    facsimile, sent by nationally recognized overnight courier or mailed by

                                      E-10
<PAGE>
    registered or certified mail (return receipt requested), postage prepaid, to
    the parties at the following address (or at such other address for a party
    as shall be specified by like notice):

<TABLE>
<S>                     <C>
If to IMS:              IMS Health Incorporated
                        200 Nyala Farms
                        Westport, Connecticut 06880
                        Attention: Chief Executive Officer
                        Telecopy: (203) 222-4247

With a copy to:         IMS Health Incorporated
                        200 Nyala Farms
                        Westport, Connecticut 06880
                        Attention: David Stevens
                                 Jared Finkelstein
                        Telecopy: (203) 222-4268

And to:                 Sullivan & Cromwell
                        125 Broad Street
                        New York, New York 10004
                        Attention: Alan J. Sinsheimer
                                 Keith A. Pagnani
                        Telecopy: (212) 558-3588

And if to TriZetto:     The TriZetto Group, Inc.
                        567 San Nicolas Drive, Suite 367
                        Newport Beach, California 92660
                        Attention: Christine A. Miller
                        Telecopy: (949) 219-2197

With a copy to:         Stradling Yocca Carlson & Rauth
                        660 Newport Center Drive, Suite 1600
                        Newport Beach, CA 92660-6422
                        Attention: K.C. Schaaf
                                 Michael E. Flynn
                        Telecopy: (949) 725-4100
</TABLE>

    All such notices and other communications shall be deemed to have been
    received (a) in the case of personal delivery, on the date of such delivery,
    (b) in the case of a facsimile, when the party receiving such copy shall
    have confirmed receipt of the communication, (c) in the case of delivery by
    nationally recognized overnight courier, on the business day following
    dispatch, and (d) in the case of mailing, on the third business day
    following such mailing.

        (h)  CONSTRUCTION OF AGREEMENT.  This Agreement has been negotiated by
    the respective parties hereto and their attorneys and the language hereof
    will not be construed for or against either party. A reference to a Section
    will mean a Section in this Agreement unless otherwise explicitly set forth.
    The titles and headings herein are for reference purposes only and will not
    in any manner limit the construction of this Agreement which will be
    considered as a whole. Whenever the words "include," "includes" or
    "including" are used in this Agreement, they shall be deemed to be followed
    by the words "without limitation."

        (i)  FURTHER ASSURANCES.  Each party agrees to cooperate fully with the
    other parties and to execute such further instruments, documents and
    agreements and to give such further written assurances as may be reasonably
    requested by any other party to evidence and reflect the

                                      E-11
<PAGE>
    transactions described herein and contemplated hereby and to carry into
    effect the intents and purposes of this Agreement.

        (j)  ENTIRE AGREEMENT.  This Agreement, the Merger Agreement (including
    the Exhibits and Schedules thereto), the Voting Agreements, the IMS
    Disclosure Letter, the TriZetto Disclosure Letter, the Data Rights
    Agreement, the Registration Rights Agreement, the HealthWeb License
    Agreement and the Transitional Services Agreements constitute the entire
    understanding and agreement of the parties hereto with respect to the
    subject matter hereof and supersede all prior and contemporaneous agreements
    or understandings, inducements or conditions, express or implied, written or
    oral, between the parties with respect hereto other than the Confidentiality
    Agreement, which shall remain in full force and effect. The express terms
    hereof control and supersede any course of performance or usage of trade
    inconsistent with any of the terms hereof.

        (k)  TERMINATION; SURVIVAL.  Immediately upon the satisfaction of the
    obligations of each party pursuant to Sections 4, 5, 6, 7, 8, and 9 of this
    Agreement (other than Sections 1, 2, 3, 10 and 11), this Agreement shall
    terminate automatically without any action by any party and such terminated
    provisions of this Agreement shall not survive such termination. This
    Section 11 and Sections 1, 2, 3, and 10 shall survive any termination of all
    or any part of this Agreement indefinitely.

        (l)  HEADINGS; RECITALS.  All Section headings and the recitals herein
    are for convenience of reference only and are not part of this Agreement,
    and no construction or reference shall be derived therefrom.

        (m)  SPECIFIC PERFORMANCE.  Each party hereto acknowledges that it will
    be impossible to measure in money the damage to the other party if a party
    hereto fails to comply with any of the obligations imposed by this
    Agreement, that every such obligation is material and that, in the event of
    any such failure, the other party will not have an adequate remedy at law or
    damages. Accordingly, each party hereto agrees that injunctive relief or
    other equitable remedy, in addition to remedies at law or damages, is the
    appropriate remedy for any such failure and will not oppose the granting of
    such relief on the basis that the other party has an adequate remedy at law.
    Each party hereto agrees that it shall not seek, and agrees to waive any
    requirement for, the securing or posting of a bond in connection with any
    other party's seeking or obtaining such equitable relief.

        (n)  THIRD PARTY BENEFICIARIES.  Nothing in this Agreement, express or
    implied, is intended to confer upon any third party any rights or remedies
    of any nature whatsoever under or by reason of this Agreement.

                                      E-12
<PAGE>
    IN WITNESS WHEREOF, the parties hereto have executed this Stockholder
Agreement as of the date first above written.

<TABLE>
<S>                                                    <C>  <C>
                                                       THE TRIZETTO GROUP, INC.

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

                                                       IMS HEALTH INCORPORATED

                                                       By:
                                                            -----------------------------------------
                                                            Name:
                                                            Title:
</TABLE>

                                      E-13
<PAGE>
                                     PROXY
                            THE TRIZETTO GROUP, INC.
                   PROXY SOLICITED BY THE BOARD OF DIRECTORS
              SPECIAL MEETING OF STOCKHOLDERS --           , 2000

    The undersigned hereby nominates, constitutes and appoints Jeffrey H.
Margolis and Michael J. Sunderland, and each of them individually, the attorney,
agent and proxy of the undersigned, with full power of substitution, to vote all
stock of THE TRIZETTO GROUP, INC. which the undersigned is entitled to represent
and vote at the Special Meeting of Stockholders of TriZetto to be held at the
Marriott Newport Beach Hotel, 900 Newport Center Drive, Newport Beach,
California 92660 on            , 2000, at 10:00 a.m., and at any and all
adjournments or postponements thereof, as fully as if the undersigned were
present and voting at the meeting, as follows:

               THE DIRECTORS RECOMMEND A VOTE "FOR" ITEMS 1 AND 2

1.  Approval of the issuance of shares of TriZetto common stock to IMS Health
    Incorporated in connection with the merger of Elbejay Acquisition Corp., a
    wholly owned subsidiary of TriZetto, with and into ERISCO Managed Care
    Technologies, Inc., a wholly owned subsidiary of IMS Health Incorporated.

            / /  FOR            / /  AGAINST            / /  ABSTAIN

2.  Approval of an amendment to TriZetto's Amended and Restated Certificate of
    Incorporation to increase the number of shares of TriZetto capital stock
    authorized for issuance from 45,000,000 to 100,000,000 consisting of
    5,000,000 shares of undesignated preferred stock and 95,000,000 shares of
    common stock.

            / /  FOR            / /  AGAINST            / /  ABSTAIN

3.  In their discretion, on such other business as may properly come before the
    meeting or any adjournment thereof.

                             (CONTINUED ON OTHER SIDE)
<PAGE>
                            (CONTINUED FROM OTHER SIDE)

       IMPORTANT--PLEASE SIGN AND DATE ON OTHER SIDE AND RETURN PROMPTLY

    THE SHARES REPRESENTED BY THIS PROXY WILL BE VOTED AS DIRECTED BY THE
STOCKHOLDER. WHERE NO DIRECTION IS GIVEN, SUCH SHARES WILL BE VOTED "FOR" THE
ISSUANCE OF SHARES OF TRIZETTO COMMON STOCK, AND "FOR"' THE AMENDMENT INCREASING
THE NUMBER OF SHARES AUTHORIZED BY TRIZETTO'S CERTIFICATE OF INCORPORATION.

                                                DATED: ___________________, 2000

                                                ________________________________
                                                   (SIGNATURE OF STOCKHOLDER)

                                                Please sign your name exactly as
                                                it appears hereon. Executors,
                                                administrators, guardians,
                                                officers of corporations and
                                                others signing in a fiduciary
                                                capacity should state their full
                                                titles as such.

      WHETHER OR NOT YOU PLAN TO ATTEND THE MEETING, YOU ARE URGED TO SIGN
   AND RETURN THIS PROXY, WHICH MAY BE REVOKED AT ANY TIME PRIOR TO ITS USE.


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