SIERRA HEALTH SERVICES INC
POS AM, 1996-05-23
HOSPITAL & MEDICAL SERVICE PLANS
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      As filed with the Securities and Exchange Commission on May 23, 1996

                            Registration No. 33-60591



                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549



                                 POST-EFFECTIVE
                                 AMENDMENT NO. 4
                                       on
                                    FORM S-3
                                       to
                            REGISTRATION STATEMENT ON
                                    FORM S-4
                                      Under
                           THE SECURITIES ACT OF 1933



                          SIERRA HEALTH SERVICES, INC.
             (Exact name of registrant as specified in its charter)



                                     Nevada
                          (State or other jurisdiction
                        of incorporation or organization)

                                   88-0200415
                     (I.R.S. Employer Identification Number)

                                      6324
                          (Primary Standard Industrial
                           Classification Code Number)

                              2724 North Tenaya Way
                             Las Vegas, Nevada 89128
                                 (702) 242-7000
(Address,  including zip code,  and telephone  number,  including  area code, of
registrant's principal executive offices)


                             Anthony M. Marlon, M.D.
                             Chief Executive Officer
                          Sierra Health Services, Inc.
                              2724 North Tenaya Way
                             Las Vegas, Nevada 89128
                                 (702) 242-7000
  (Name and address, including zip code, and telephone number, including area
                          code, of agent for service)



                                    Copy to:

                            Stephen P. Farrell, Esq.
                           Morgan, Lewis & Bockius LLP
                                 101 Park Avenue
                            New York, New York 10178
                                 (212) 309-6000







<PAGE>



                         Approximate  date of  commencement  of proposed sale to
                  the public: As soon as practicable after the effective date of
                  this Registration Statement.



     If the only  securities  being  registered  on this form are being  offered
pursuant to dividend or interest  reinvestment plans, please check the following
box. |_|

     If any of the securities being registered on this form are to be offered on
a delayed or continuous  basis  pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box. |X|

     If this Form is filed to  register  additional  securities  for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list  the  Securities  Act  registration  statement  number  of the  earlier
effective registration statement for the same offering. |_|

     If this Form is a  post-effective  amendment  filed pursuant to Rule 462(c)
under the  Securities  Act,  check the following box and list the Securities Act
registration  statement number of the earlier effective  registration  statement
for the same offering. |_|

     If delivery of the prospectus is expected to be made pursuant to Rule 434, 
please check the following box. |_|

     The Registrant  hereby amends this  Registration  Statement on such date or
dates as may be necessary to delay its effective date until the Registrant shall
file a further  amendment  which  specifically  states  that  this  Registration
Statement shall  thereafter  become effective in accordance with Section 8(a) of
the Securities  Act of 1933 or until this  Registration  Statement  shall become
effective on such date as the Commission,  acting pursuant to said Section 8(a),
may determine.





<PAGE>



PROSPECTUS


                                  26,640 Shares

                          SIERRA HEALTH SERVICES, INC.

                                  Common Stock

     This  Prospectus  relates to the offer and sale of up to 26,640 shares (the
"Shares") of Common Stock of Sierra Health Services, Inc. ("Sierra"),  par value
$0.005 per share (the "Sierra Common Stock"),  purchasable  upon the exercise of
certain  outstanding  options (the "Options")  issued pursuant to CII Financial,
Inc.'s  ("CII's")  1993  Employee  Stock  Incentive  Plan (the "1993  Plan") and
subsequently  transferred to the selling  stockholder  named in this  Prospectus
(the "Selling  Stockholder") and assumed by Sierra and the resale of such Shares
from time to time by and for the account of the Selling Stockholder.
See "Selling Stockholder."

     The Selling  Stockholder  and any  broker-dealers  that  participate in the
distribution of the Shares may be deemed to be "underwriters" within the meaning
of the  Securities  Act of 1933,  as amended  (the  "Securities  Act"),  and any
commission or profit on the resale of shares received by such broker-dealers may
be deemed to be underwriting commissions and discounts under the Securities Act.
Upon  Sierra's  being  notified by the  Selling  Stockholder  that any  material
arrangement has been entered into with a broker or dealer for the sale of shares
through  a  secondary  distribution,  or a  purchase  by a broker or  dealer,  a
supplemental  Prospectus  will be filed,  if  required,  disclosing  among other
things the names of any such broker-dealer,  the number of shares involved,  the
price at which  such  shares  are  being  sold and the  commissions  paid or the
discounts or concessions allowed to any such broker-dealer.

     The Sierra Common Stock is listed on the New York Stock  Exchange  (Symbol:
"SIE").  On May 22,  1996,  the last sale  price of the Sierra  Common  Stock as
reported on the New York Stock Exchange Composite Tape was $33.75 per share.



  THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
       EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE
      SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION
          PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY
              REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.


                  The date of this Prospectus is      , 1996.



<PAGE>



     No  person  is  authorized  to  give  any   information   or  to  make  any
representation  not contained or incorporated  by reference in this  Prospectus,
and, if given or made,  such  information or  representation  must not be relied
upon as having been  authorized by Sierra or any  underwriter,  agent or dealer.
This  Prospectus  does not constitute an offer to sell or a  solicitation  of an
offer to buy any  securities  other than the Securities in respect of which this
Prospectus is delivered or an offer of any securities in any jurisdiction to any
person  where such an offer  would be  unlawful.  Neither  the  delivery of this
Prospectus  nor  any  sales  made  hereunder  or  thereunder  shall,  under  any
circumstances,  create  any  implication  that  there  has been no change in the
affairs of Sierra since their respective dates.


                              AVAILABLE INFORMATION

     Sierra is  subject  to the  informational  requirements  of the  Securities
Exchange  Act of 1934,  as  amended  (the  "Exchange  Act"),  and in  accordance
therewith files periodic  reports,  proxy statements and other  information with
the Securities and Exchange Commission (the "Commission").  Such reports,  proxy
statements and other  information  concerning Sierra may be inspected and copied
at the Commission's Public Reference Section,  450 Fifth Street, N.W., Judiciary
Plaza, Washington, D.C. 20549, where copies may be obtained at prescribed rates,
as well as at the following regional offices: Northeast Regional Office, 7 World
Trade Center, Suite 1300, New York, New York 10048; and Midwest Regional Office,
Citicorp  Center,  500  West  Madison  Street,  Suite  1400,  Chicago,  Illinois
60661-2511. Sierra Common Stock is listed on the New York Stock Exchange. Copies
of reports, proxy statements and other information concerning Sierra may also be
inspected at the office of such  Exchange,  20 Broad Street,  New York, New York
10005.


     Sierra has filed a  Registration  Statement on Form S-4 (the  "Registration
Statement") and an amendment to it on Form S-3 under the Securities Act with the
Commission with respect to the securities  offered  hereby.  As permitted by the
rules  and  regulations  of  the  Commission,   this  Prospectus  omits  certain
information  contained in the  Registration  Statement  and such  amendment  and
reference is hereby made thereto for further  information with respect to Sierra
and the Sierra Common Stock.


                INCORPORATION OF CERTAIN INFORMATION BY REFERENCE

     The  following   documents   filed  with  the   Commission  by  Sierra  are
incorporated in this Prospectus by reference:

     1. Annual  Report on Form 10-K for the fiscal year ended  December 31, 1995
filed  pursuant  to Section  13(a) or 15(d) of the  Exchange  Act filed with the
Commission on April 1, 1996 (the "Sierra 10-K").

     2.  Quarterly  Report on Form 10-Q for the fiscal  quarter  ended March 31,
1996 filed with the Commission on May 15, 1996.

     3. Current  Report on Form 8-K filed pursuant to Section 13 or 15(d) of the
Exchange Act filed with the Commission on March 4, 1996.

     4. All other reports filed by Sierra  pursuant to Section 13(a) or 15(d) of
the Exchange Act since the end of the fiscal year ended December 31, 1995.

     5. The description of the Sierra Common Stock contained in the Registration
Statement of Sierra on Form 8-A filed  pursuant to the Exchange Act on March 31,
1994, and effective on April 14, 1994.

     6. The  description of certain rights  attaching to the Sierra Common Stock
to purchase  Series A Junior  Participating  Preferred  Stock  contained  in the
Registration  Statement of Sierra on Form 8-A filed pursuant to the Exchange Act
on July 1, 1994.


                                        2

<PAGE>



     All  reports  and other  documents  filed by Sierra  after the date of this
Prospectus  pursuant to Sections  13(a),  13(c), 14 or 15(d) of the Exchange Act
and prior to the termination of this offering shall be deemed to be incorporated
by reference herein and to be a part hereof.

     Statements  contained in this Prospectus as to the contents of any contract
or document are not  necessarily  complete and in each instance such  statements
are  qualified in their  entirety by  reference to the copy of such  contract or
other document filed as an exhibit to the Registration Statement or incorporated
by reference  therein.  Any statement  contained in a document  incorporated  or
deemed to be  incorporated in this Prospectus by reference shall be deemed to be
modified or superseded  for the purpose of this  Prospectus to the extent that a
statement  contained  in this  Prospectus  or in any  other  subsequently  filed
document  which also is or is deemed to be  incorporated  in this  Prospectus by
reference modifies or supersedes such statement.  Any such statement so modified
or  superseded  shall not be deemed,  except as so  modified or  superseded,  to
constitute a part of this Prospectus.

     This Prospectus incorporates documents by reference which are not presented
herein or delivered  herewith.  These  documents are available upon request from
Sierra,  P.O. Box 15645, Las Vegas,  Nevada  89114-5645,  Attention:  Secretary,
telephone: (702) 242-7189.


                                   THE COMPANY

     Sierra is a managed health care  organization that provides and administers
the delivery of  comprehensive  health care and workers'  compensation  programs
with an emphasis on quality care and cost management. Sierra's strategy has been
to develop and offer a portfolio  of managed  health care  products and workers'
compensation  products to employer groups and individuals.  Sierra's broad range
of managed  health care  services is provided  through its  federally  qualified
health  maintenance   organizations  ("HMOs"),   insurance  companies,   managed
indemnity  plans, a third-party  administrative  services  program for employer-
funded  health  benefit  plans  and  workers'  compensation  medical  management
programs.  Ancillary  products and services  that  complement  Sierra's  managed
health care and workers'  compensation product lines are also offered.  Sierra's
primary  types of health  care  coverage  are HMO  plans,  HMO Point of  Service
("POS") plans and managed  indemnity plans,  which include a preferred  provider
organization  option.  The POS products allow members to choose one of the other
coverage  options when medical services are required instead of one plan for the
entire year.

     On October 31, 1995, Sierra acquired CII, a workers' compensation insurance
holding company,  in a merger transaction in which each outstanding share of CII
Common Stock,  stated value $.50 per share ("CII Common  Stock"),  was converted
into 0.37 of a share of the Sierra  Common Stock (the  "Merger").  In connection
with the Merger,  each outstanding option to purchase shares of CII Common Stock
issued  pursuant to various CII option plans,  including the 1993 Plan,  whether
vested or unvested, was assumed by Sierra. See "Description of Options."

     CII writes  workers'  compensation  insurance in the states of  California,
Colorado,  Kansas,  Nebraska,  New Mexico and Utah.  Sierra has  licenses  in 21
states  and  the  District  of  Columbia.   California  and  Colorado  represent
approximately  84% and  13%,  respectively,  of  CII's  fully  insured  workers'
compensation insurance premiums in 1995.

     Sierra, a Nevada corporation, has principal executive offices at 2724 North
Tenaya Way, Las Vegas, Nevada 89128 and its telephone number is (702) 242-7000.


                                 USE OF PROCEEDS

     The proceeds  received by Sierra upon  exercise of the Options will be used
for general corporate purposes. Sierra will not receive any of the proceeds from
the resale of the Shares by the Selling Stockholder.




                                        3

<PAGE>




                             DESCRIPTION OF OPTIONS

     Pursuant to Section 5.7 of the  Agreement  and Plan of Merger (the  "Merger
Agreement"),  dated as of June 12,  1995,  whereby  CII was  acquired by Sierra,
Sierra assumed outstanding options under various CII option plans, including the
1993 Plan.  Because Sierra will not issue new options or awards under the plans,
in effect  Sierra  assumed  the  obligation  to  deliver  shares  upon the valid
exercise of options outstanding under such plans at the time of the Merger.

     The option  granted  pursuant to each option  agreement now  represents the
right to purchase shares of the Sierra Common Stock, rather than shares of CII's
Common  Stock,  at an exercise  price per share equal to the exercise  price per
share of such option at the time of the Merger,  determined as set forth in each
such  option  agreement,  divided at the time of the  Merger by .37.  Under this
formula the aggregate exercise price of the option remains  unchanged.  However,
because the number of shares of common  stock that may be  purchased by exercise
of the option is reduced as compared to the number of shares of CII Common Stock
formerly purchasable by exercise of the option, the corresponding exercise price
per share  increased.  As provided in Section  5.7 and  otherwise  in the Merger
Agreement, the number of shares of Sierra Common Stock that may be acquired upon
exercise of an outstanding  option under each option  agreement  equals .37 of a
share of Sierra Common Stock for each share of CII Common Stock formerly subject
to such option.  The number of shares  issuable  under such option is subject to
adjustment  in  the  event  of  a  stock  split,  stock  dividend,   or  certain
extraordinary events affecting the Shares.

         At the time of the Merger,  the total number of shares of Sierra Common
Stock  reserved and available for issuance to  participants  in connection  with
awards under  various CII option plans was  536,713,  which  includes the 26,640
shares covered by this  Prospectus and registered by Sierra on a  Post-Effective
Amendment on Form S-3 to the Registration  Statement.  The Options, which can be
exercised  to  purchase  such 26,640  shares,  were  transferred  to the Selling
Stockholder in December 1994. Options to purchase 23,680 shares and 2,960 shares
expire on May 18, 2003 and November 12, 2013, respectively,  and are exercisable
at $15.54 per share and $17.57 per share, respectively.

     Shares  acquired  under the 1993 Plan  should not be resold by the  Selling
Stockholder  or other  person if then in  possession  of  material,  non-public,
adverse  information about Sierra.  In addition,  any person who receives shares
pursuant  to the 1993  Plan may be  deemed  to be an  "underwriter"  within  the
meaning of Rule 145 under the Securities  Act and,  therefore,  restricted  from
selling,  assigning or transferring such shares unless such transaction complies
with Rules 144 and 145 under the  Securities  Act, or is covered by an effective
registration  statement  filed with the  Commission  under the  Securities  Act.
Persons  who are deemed  "affiliates"  of Sierra  must  resell  shares of Sierra
Common Stock acquired  under the 1993 Plan in compliance  with Rule 144, or in a
transaction  covered  by an  effective  registration  statement  filed  with the
Commission under the Securities Act.

     The  grant of the  Options  under  the 1993  Plan  created  no  income  tax
consequences  for the  optionee  or Sierra.  Upon  exercise  of an  option,  the
optionee must generally recognize ordinary income equal to the fair market value
of the Sierra Common Stock  acquired on the date of exercise  minus the exercise
price, and Sierra will be entitled to a deduction equal to the amount recognized
as ordinary  income by the  optionee.  The  optionee  to which the Options  were
originally  granted may remain subject to such federal income  taxation  despite
his  transfer  of the  Options  to the  Selling  Stockholder.  A sale of  shares
acquired upon the exercise of an option  generally  will result in short-term or
long-term capital gain or loss measured by the difference between the sale price
and the  optionee's  tax basis  (generally,  the exercise  price plus the amount
recognized as ordinary income) in such shares. There will be no tax consequences
to Sierra from a sale of option shares.

     The 1993 Plan is not qualified under Section 401(a) of the Internal Revenue
Code of 1986, as amended, and is not subject to the requirements of the Employee
Retirement Income Security Act of 1974, as amended.


                                        4

<PAGE>




                               SELLING STOCKHOLDER

     The Shares offered hereby may be resold by the Selling Stockholder.

     The following  table and text show each material  relationship  between the
Selling  Stockholder and CII or its affiliates  within the past three years, the
number of shares of the  outstanding  Sierra  Common  Stock owned by the Selling
Stockholder as of April 30, 1996; including the number of such Shares subject to
existing  rights and  options  granted  under the 1993 Plan,  the number of such
Shares  which may be sold for the  account of the Selling  Stockholder,  and the
number of such shares that will be owned by the Selling Stockholder assuming the
sale of all the Shares offered hereby. The Selling Stockholder did not own as of
April 30, 1996,  nor will he own as of the  completion of this offering  (unless
additional shares are purchased by the Selling Stockholder), one percent or more
of the outstanding Sierra Common Stock.
<TABLE>
<CAPTION>


                                          Number of                                                      Number of
                                        Shares Owned                   Shares Which                    Shares Owned
     Selling Stockholder                 Before Sale                    May be Sold                     After Sale

<S>                                        <C>                            <C>                              <C>  
     The Havlick Family                    35,690                         26,640                           9,050
    Grandchildren's Trust
</TABLE>



     The trustee of The Havlick Family  Grandchildren's Trust is Lee W. Spitler,
Jr. During the three years prior to Sierra's acquisition of CII in October 1995,
Mr.   Spitler  was  Senior  Vice  President  and  Treasurer  of  CII.  Upon  the
consummation  of the  acquisition,  Mr.  Spitler  was  elected to CII's Board of
Directors and in February 1996 he was appointed President of CII.

                              PLAN OF DISTRIBUTION

     The  Shares  covered  by this  Prospectus  will be issued  by  Sierra  upon
exercise of the Options.  The Shares may be resold by the Selling Stockholder or
by its pledgees,  donees,  transferees  or other  successors  in interest.  Such
resales may be made on one or more exchanges or in the over-the-counter  market,
or otherwise at prices and at terms then  prevailing or at prices related to the
then-current  market  price,  or in negotiated  transactions.  The Shares may be
resold by one or more of the following methods, without limitation:  (a) a block
trade in which the broker or dealer so engaged  will  attempt to sell the shares
as agent but may  position  and  resell a portion of the block as  principal  to
facilitate the transaction; (b) purchases by a broker or dealer as principal and
resale by such broker or dealer for its account pursuant to this Prospectus; (c)
ordinary  brokerage  transactions  and transactions in which the broker solicits
purchasers;  (d) an exchange  distribution  in accordance with the rules of such
exchange;  and (e) face-to- face  transactions  between  sellers and  purchasers
without a broker-dealer.  In effecting sales,  brokers or dealers engaged by the
Selling  Stockholder  may arrange for other  brokers or dealers to  participate.
Brokers or  dealers  may  receive  commissions  or  discounts  from the  Selling
Stockholder  in amounts to be  negotiated  immediately  prior to the sale.  Such
brokers or dealers and any other participating  brokers or dealers may be deemed
to be "underwriters" within the meaning of the Securities Act in connection with
such sales.

     Upon Sierra's being notified by the Selling  Stockholder  that any material
arrangement has been entered into with a broker or dealer for the sale of Shares
through  a  secondary  distribution,  or a  purchase  by a broker or  dealer,  a
supplement to the Prospectus will be filed, if required, pursuant to Rule 424(b)
under the Securities  Act,  disclosing (a) the name of such Selling  Stockholder
and the participating broker-dealers, (b) the number of Shares involved, (c) the
price at which  such  Shares are being  sold,  (d) the  commissions  paid or the
discounts or concessions allowed to such  broker-dealers,  (e) where applicable,
that such  broker-dealers  did not  conduct  any  investigation  to  verify  the
information  set  out or  incorporated  by  reference  in  this  Prospectus,  as
supplemented, and (f) other facts material to the transaction.



                                        5

<PAGE>



     In  addition  to any such number of Shares  resold  hereunder,  the Selling
Stockholder  may,  at the same  time,  sell any shares of Sierra  Common  Stock,
including the Shares,  owned by him or her in compliance  with Rules 144 and 145
under the Securities Act,  regardless of whether such shares are covered by this
Prospectus.

     There is no assurance that the Selling  Stockholder  will resell any or all
of the Shares offered hereby.

     Sierra will pay all expenses in connection with the primary offering of the
Shares, other than commission and discounts of underwriters, dealers or agents.


                             VALIDITY OF SECURITIES

     The  validity of the issuance of the Shares has been passed upon by Morgan,
Lewis & Bockius LLP, Los Angeles, California.


                                     EXPERTS

     The Consolidated Financial Statements of Sierra Health Services, Inc. as of
December  31, 1995 and 1994 and for each of the three years in the period  ended
December 31, 1995  incorporated  in this Prospectus by reference from the Sierra
10-K have been audited by Deloitte & Touche LLP, independent auditors, as stated
in their  report,  which is  incorporated  herein by  reference  and has been so
incorporated in reliance upon the report of such firm given upon their authority
as experts in accounting and auditing.

     The Consolidated Financial Statements of Sierra Health Services,  Inc. give
retroactive  effect to the Merger,  which has been accounted for as a pooling of
interests.  Deloitte  & Touche  LLP did not  audit  the  Consolidated  Financial
Statements  of CII  Financial,  Inc. as of  December  31, 1994 and for the years
ended December 31, 1994 and 1993  incorporated  in this  Prospectus by reference
from the Sierra 10-K. The  Consolidated  Financial  Statements of CII Financial,
Inc. as of December 31, 1994 and for the years ended  December 31, 1994 and 1993
have been audited by BDO Seidman, LLP, independent certified public accountants,
as stated in their report,  which is  incorporated  herein by reference and have
been so  incorporated  in reliance upon the report of such firm given upon their
authority as experts in accounting and auditing.



                                        6

<PAGE>




                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS


Item 14. Other Expenses of Issuance and Distribution.

     The following  table sets forth the expenses to be borne by the  Registrant
in connection with the offering described in this Registration Statement. All of
such amounts are estimated  except for the SEC Registration Fee and the New York
Stock Exchange additional listing fee.

      SEC Registration Fee..................................    Previously Paid
      New York Stock Exchange Additional Listing Fee........    Previously Paid
      Printing and Engraving Costs..........................  $          500.00
      Legal Fees and Expenses...............................           6,000.00
      Accounting Fees and Expenses..........................           4,000.00
      Miscellaneous.........................................           1,000.00
                                                              -----------------
      Total.................................................   $      11,500.00
                                                               ================



Item 15. Indemnification of Directors and Officers.

     Section  78.751 of the Nevada  Domestic  and  Foreign  Corporation  Law and
Article VII of the Registrant's  By-laws provide for the  indemnification  under
certain conditions of directors,  officers, employees and agents acting in their
official capacities.

     The  Registrant  has not entered into separate  indemnification  agreements
with any of its officers or directors.

     The Registrant has purchased  directors' and officers'  liability insurance
insuring the Registrant's officers and directors against certain liabilities and
expenses incurred by such persons in such capacities.


Item 16. Exhibits

   Exhibit
  Number                                                  Description

    *2.1     Agreement and Plan of Merger, dated as of June 12, 1995, among the 
             Registrant, Health Acquisition Corp. and CII Financial, Inc.
     3.1     Articles of  Incorporation,  together  with  amendments  thereto to
             date,  incorporated  by reference to Exhibit 3 to the  Registrant's
             Annual  Report on Form 10-K for the fiscal year ended  December 31,
             1990.
     3.2     Amended and Restated  By-laws of the  Registrant,  incorporated  by
             reference to Exhibit 3.3 to the Registrant's  Annual Report on Form
             10-K/A for the fiscal year ended December 31, 1994.
     4.1     Certificate of Division of Shares into Smaller Denominations of the
             Registrant,  incorporated by reference to the  Registrant's  Annual
             Report on Form 10-K for the fiscal year ended December 31, 1992.
     4.2     Rights Agreement, dated as of June 14, 1994, between the Registrant
             and  Continental  Stock Transfer & Trust Company,  incorporated  by
             reference to Exhibit 1 to the Registrant's  Registration  Statement
             on Form 8-A effective September 19, 1994 (File No. 1-8865).
    *5.1     Opinion of Morgan, Lewis & Bockius.
    23.1     Consent of Deloitte & Touche LLP.
    23.2     Consent of BDO Seidman, LLP.


                                      II-1

<PAGE>




   *23.3     Consent of Morgan, Lewis & Bockius (included in Exhibit 5.1).
   *24.1     Power of Attorney.


  * Previously filed.


Item 17. Undertakings

     (A) The undersigned hereby undertakes:

     (1) To file,  during any period in which  offers or sales are being made, a
post-effective amendment to this Registration Statement:

          (i) To include any prospectus required by Section 10(a)(3) of the 
Securities Act of 1933;

          (ii) To reflect in the  Prospectus  any facts or events  arising after
the  effective  date  of  the   Registration   Statement  (or  the  most  recent
post-effective  amendment  thereof)  which,  individually  or in the  aggregate,
represent a fundamental  change in the information set forth in the Registration
Statement.  Notwithstanding the foregoing, any increase or decrease in volume of
securities  offered (if the total dollar value of  securities  offered would not
exceed that which was  registered) and any deviation from the low or high end of
the estimated  maximum offering range may be reflected in the form of prospectus
filed with the  Commission  pursuant  to Rule 424(b) if, in the  aggregate,  the
changes in volume and price  represent  no more than a 20 percent  change in the
maximum  aggregate  offering price set forth in the "Calculation of Registration
Fee" table in the effective Registration Statement; and

          (iii) To include any material  information with respect to the plan of
distribution  not  previously  disclosed  in the  Registration  Statement or any
material change to such information in the Registration Statement;

     provided,  however that paragraphs (1)(i) and (1)(ii) above do not apply if
     the  Registration  Statement is on Form S-3,  Form S-8 or Form F-3, and the
     information required to be included in a post-effective  amendment by those
     paragraphs is contained in periodic  reports filed with or furnished to the
     Commission by the Registrant pursuant to Section 13 or Section 15(d) of the
     Securities  Exchange Act of 1934 that are  incorporated by reference in the
     Registration Statement.

     (2) That, for the purpose of determining any liability under the Securities
Act of 1933,  each  such  post-effective  amendment  shall be deemed to be a new
registration  statement  relating to the  securities  offered  therein,  and the
offering of such  securities  at the time shall be deemed to be the initial bona
fide offering thereof.

     (3) To remove from registration by means of a post-effective  amendment any
of the securities being registered which remain unsold at the termination of the
offering.

     (B) The  undersigned  Registrant  hereby  undertakes  that, for purposes of
determining  any liability  under the Securities Act of 1933, each filing of the
Registrant's  annual  report  pursuant to Section  13(a) or Section 15(d) of the
Securities  Exchange  Act of  1934  that is  incorporated  by  reference  in the
Registration  Statement  shall  be  deemed  to be a new  registration  statement
relating to the securities offered therein,  and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof.



                                      II-2

<PAGE>



     (C) Insofar as indemnification for liabilities arising under the Securities
Act of 1933 may be permitted to directors,  officers and controlling  persons of
the Registrant pursuant to the foregoing provisions or otherwise, the Registrant
has been advised that in the opinion of the Securities  and Exchange  Commission
such  indemnification  is against  public policy as expressed in the Act and is,
therefore,  unenforceable. In the event that a claim for indemnification against
such liabilities  (other than the payment by the Registrant of expenses incurred
or paid by a director,  officer or  controlling  person of the Registrant in the
successful  defense of any  action,  suit or  proceeding)  is  asserted  by such
director,  officer or controlling person in connection with the securities being
registered, the Registrant will, unless in the opinion of its counsel the matter
has been  settled by  controlling  precedent,  submit to a court of  appropriate
jurisdiction the question whether such  indemnification  by it is against public
policy as expressed in the Act and will be governed by the final adjudication of
such issue.

                                      II-3

<PAGE>




                                   SIGNATURES

     Pursuant to the  requirements of the Securities Act of 1933, the Registrant
certifies  that it has  reasonable  grounds to believe  that it meets all of the
requirements  for  filing on Form S-3 and has duly  caused  this  Post-Effective
Amendment No. 4 to the Registration  Statement to be signed on its behalf by the
undersigned,  thereunto  duly  authorized,  in the City of Las  Vegas,  State of
Nevada, on the 23rd day of May, 1996.

                                        SIERRA HEALTH SERVICES, INC.

                                        By /s/ Anthony M. Marlon, M.D.
                                           __________________________
                                        Anthony M. Marlon, M.D.
                                        Chief Executive Officer

     Pursuant  to  the   requirements  of  the  Securities  Act  of  1933,  this
Registration  Statement  has  been  signed  by  the  following  persons  in  the
capacities and on the dates indicated.



Signature                         Capacity in Which Signed                 Date

/s/ ANTHONY M. MARLON, M.D.
    _______________________
    Anthony M. Marlon, M.D.       Chief Executive Officer and
                                  Chairman of the Board (Principal
                                  Executive Officer)                May 23, 1996


       *
___________________________
James L. Starr                    Vice President of Finance, Chief
                                  Financial Officer, and Treasurer
                                  (Principal Financial and
                                  Accounting Officer)               May 23, 1996


       
___________________________
Thomas Y. Hartley                 Director                          


       *
___________________________
Erin E. MacDonald                 Director                          May 23, 1996


       *
___________________________
William J. Raggio                 Director                          May 23, 1996


       *
___________________________
Charles L. Ruthe                  Director                          May 23, 1996

*By /s/ Anthony M. Marlon, M.D.
    ___________________________
         Anthony M. Marlon, M.D.
         As Attorney-in-Fact


                                      II-4

<PAGE>




                                  EXHIBIT INDEX

   Exhibit No.     Description

     *2.1    Agreement and Plan of Merger, dated as of June 12, 1995, among the
             Registrant, Health Acquisition Corp. and CII Financial, Inc.
      3.1    Articles of  Incorporation,  together  with  amendments  thereto to
             date,  incorporated  by reference to Exhibit 3 to the  Registrant's
             Annual  Report on Form 10-K for the fiscal year ended  December 31,
             1990.
      3.2    Amended and Restated By-laws of the Registrant, incorporated by 
             reference to Exhibit 3.3 to the Registrant's Annual Report on Form 
             10-K/A for the fiscal year ended December 31, 1994.
      4.1    Certificate of Division of Shares into Smaller Denominations of the
             Registrant,  incorporated  by  reference  to  Exhibit  3.3  to  the
             Registrant's  Annual  Report on Form 10-K for the fiscal year ended
             December 31, 1992.
      4.2    Rights Agreement, dated as of June 14, 1994, between the Registrant
             and  Continental  Stock Transfer & Trust Company,  incorporated  by
             reference to Exhibit 11 to the Registrant's  Registration Statement
             on Form 8-A effective September 19, 1994 (File No. 1-8865).
     *5.1    Opinion of Morgan, Lewis & Bockius.
     23.1    Consent of Deloitte & Touche LLP.
     23.2    Consent of BDO Seidman, LLP.
    *23.3    Consent of Morgan, Lewis & Bockius (included in Exhibit 5.1).
    *24.1    Power of Attorney.




*Previously filed.



<PAGE>




                                                                  EXHIBIT 23.1


INDEPENDENT AUDITORS' CONSENT

We  consent  to the  incorporation  by  reference  in  this  Post-Effective
Amendment No. 4 on Form S-3 to  Registration  Statement  No.  33-60591 of Sierra
Health  Services,  Inc.  on Form S-4 of our  report  dated  February  28,  1996,
appearing in the Annual Report on Form 10-K of Sierra Health Services,  Inc. for
the year ended  December 31, 1995,  and to the reference to us under the heading
"Experts" in the Prospectus, which is part of such Registration Statement.


DELOITTE & TOUCHE LLP


Las Vegas, Nevada
May 22, 1996



<PAGE>



                                                                  EXHIBIT 23.2

               CONSENT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS


     We  consent  to the  incorporation  by  reference  in  this  Post-Effective
Amendment No. 4 on Form S-3 to  Registration  Statement  No.  33-60591 of Sierra
Health Services,  Inc. on Form S-4 of our report dated February 17, 1995, except
for  Note  16  which  is as of June  13,  1995  with  respect  to the  financial
statements  of CII  Financial,  Inc.  and its  subsidiaries  for the year  ended
December 31, 1994,  appearing in the Annual Report on Form 10-K of Sierra Health
Services,  Inc. for the year ended  December 31, 1995 and to the reference to us
under the heading "Experts" in the Prospectus which is part of such Registration
Statement.


                                                      BDO SEIDMAN, LLP

Los Angeles, California
May 22, 1996




<PAGE>





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