<PAGE>
 
 AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON SEPTEMBER 24, 1997
                                                 Registration No. 333-__________
================================================================================


                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549

                               _________________
                                   FORM S-8
                            REGISTRATION STATEMENT
                                     UNDER
                          THE SECURITIES ACT OF 1933
                               _________________

                         CONCENTRA MANAGED CARE, INC.
            (Exact name of registrant as specified in its charter)

         DELAWARE                                            04-3363415
(State or other jurisdiction of                           (I.R.S. Employer
 incorporation or organization)                          Identification No.)

                                312 UNION WHARF
                         BOSTON, MASSACHUSETTS  02109
         (Address of principal executive offices, including zip code)
                             ____________________

                  CONCENTRA MANAGED CARE, INC. STOCK OPTIONS

   CRA MANAGED CARE, INC. 1994 TIME ACCELERATED RESTRICTED STOCK OPTION PLAN

          CRA MANAGED CARE, INC. 1994 NON-QUALIFIED STOCK OPTION PLAN
                          FOR NON-EMPLOYEE DIRECTORS

                           (Full title of the plan)

                               DONALD J. LARSON
                     PRESIDENT AND CHIEF EXECUTIVE OFFICER
                         CONCENTRA MANAGED CARE, INC.
                                312 UNION WHARF
                         BOSTON, MASSACHUSETTS  02109
                                (617) 367-2163
           (Name, address and telephone number of agent for service)

                                   copy to:
                              RICHARD A. PARR II
                 EXECUTIVE VICE PRESIDENT AND GENERAL COUNSEL
                         CONCENTRA MANAGED CARE, INC.
                          3010 LBJ FREEWAY, SUITE 400
                              DALLAS, TEXAS 75234
                                (972) 484-2700

                        CALCULATION OF REGISTRATION FEE
<TABLE>
<CAPTION>
=========================================================================================================== 
                                                                           Proposed
   Title of securities       Amount to be        Proposed maximum      maximum aggregate     Amount of
    to be registered          registered     offering price per unit*   offering price*   registration fee
-----------------------------------------------------------------------------------------------------------
<S>                        <C>               <C>                       <C>                <C> 
 Common Stock, $0.01 par
  value per share......... 1,382,666 shares           $32.18              $44,494,192        $13,484
----------------------------------------------------------------------------------------------------------
</TABLE>

*    Estimated solely for purposes of calculating the registration fee in
     accordance with Rule 457(h) under the Securities Act of 1933 and based on
     the average of the high and low sales prices of the Common Stock reported
     on The Nasdaq Stock Market on September 18, 1997.

================================================================================
<PAGE>
 
                               EXPLANATORY NOTE

     On August 29, 1997, CRA Managed Care, Inc., a Massachusetts corporation
("CRA"), merged (the "Merger") with and into a wholly-owned subsidiary of
Concentra Managed Care, Inc., a Delaware corporation (the "Registrant"),
pursuant to an Agreement and Plan of Reorganization (the "Reorganization
Agreement") dated as of April 21, 1997, by and among CRA, OccuSystems, Inc., a
Delaware corporation, and the Registrant.  Pursuant to the terms of the
Reorganization Agreement, (a) the Registrant assumed each outstanding option to
purchase common stock, par value $.01 per share, of CRA ("CRA Common Stock")
granted under the CRA Managed Care, Inc. 1994 Time Accelerated Restricted Stock
Option Plan and the CRA Managed Care, Inc. 1994 Non-Qualified Stock Option Plan
for Non-Employee Directors (the "Plans"), and (b) the assumed options became
exercisable for common stock, par value $.01 per share, of the Registrant
("Concentra Common Stock") at an exchange rate of 1.786 shares of Concentra
Common Stock for each share of CRA Common Stock. The Registrant is filing this
Registration Statement on Form S-8 to reflect the assumption by the Registrant
of each such option to purchase CRA Common Stock and the conversion of the
options to purchase CRA Common Stock into options to purchase Concentra Common
Stock in the Merger.

                                    PART II
              INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

ITEM 3.   INCORPORATION OF DOCUMENTS BY REFERENCE.
          --------------------------------------- 

     The following documents have been filed with the Securities and Exchange
Commission by the Registrant and are incorporated herein by reference and made a
part hereof:

     (a)  The Registrant's Registration Statement on Form S-4 (File No. 333-
          27105) filed on July 31, 1997;

     (b)  The Registrant's Current Report on Form 8-K filed on September 11,
          1997; and

     (c)  The description of the Concentra Common Stock, contained in Item 1 of
          the Registrant's Registration Statement on Form 8-A filed with the
          Commission pursuant to the Securities Exchange Act of 1934 (the
          "Exchange Act") on June 25, 1997 (File No. 0-22751).

     All documents subsequently filed by the Registrant pursuant to Sections
13(a), 13(c), 14 and 15(d) of the Exchange Act prior to the filing of a post-
effective amendment that indicates that all securities offered have been sold or
that deregisters all securities then remaining unsold shall also be deemed to be
incorporated by reference herein and to be a part hereof from the dates of
filing of such documents.  Any statement contained in a document incorporated or
deemed to be incorporated by reference herein shall be deemed to be modified or
superseded for purposes of this Registration Statement to the extent that a
statement contained herein or in any other subsequently filed document which
also is or is deemed to be incorporated by reference herein modifies or
supersedes such statement.  Any statement so modified or superseded shall not be
deemed, except as so modified or superseded, to constitute a part of this
Registration Statement.  Upon the written or oral request of any person to whom
a copy of this Registration Statement has been delivered, the Registrant will
provide without charge to such person a copy of any and all documents (excluding
exhibits thereto unless such exhibits are specifically incorporated by reference
into such documents) that have been incorporated by reference into this
Registration Statement but not delivered herewith.  Requests for such documents
should be addressed to Concentra Managed Care, Inc., 3010 LBJ Freeway, Suite
400, Dallas, Texas 75234, Attention: Secretary, (972) 481-7507.

ITEM 4.   DESCRIPTION OF SECURITIES.
          ------------------------- 

     Not applicable.


ITEM 5.   INTERESTS OF NAMED EXPERTS AND COUNSEL.
          -------------------------------------- 

     Not applicable.

                                      -1-
<PAGE>
 
ITEM 6.   INDEMNIFICATION OF DIRECTORS AND OFFICERS.
          ----------------------------------------- 

     Article Twelfth of the Amended and Restated Certificate of Incorporation of
the Registrant provides that the Registrant shall indemnify its officers and
directors to the maximum extent allowed by the Delaware General Corporation Law.
Pursuant to Section 145 of the Delaware General Corporation Law, the Registrant
generally has the power to indemnify its present and former directors and
officers against expenses and liabilities incurred by them in connection with
any suit to which they are, or are threatened to be made, a party by reason of
their serving in those positions so long as they acted in good faith and in a
manner they reasonably believed to be in, or not opposed to, the best interests
of the Registrant, and with respect to any criminal action, so long as they had
no reasonable cause to believe their conduct was unlawful.

     With respect to suits by or in the right of the Registrant, however,
indemnification is generally limited to attorney's fees and other expenses and
is not available if the person is adjudged to be liable to the Registrant,
unless the court determines that indemnification is appropriate.  The statute
expressly provides that the power to indemnify authorized thereby is not
exclusive of any rights granted under any bylaw, agreement, vote of stockholders
or disinterested directors, or otherwise.  The Registrant also has the power to
purchase and maintain insurance for its directors and officers.  Additionally,
Article Twelfth of the Amended and Restated Certificate of Incorporation
provides that, in the event that an officer or director files suit against the
Registrant seeking indemnification of liabilities or expenses incurred, the
burden will be on the Registrant to prove that the indemnification would not be
permitted under the Delaware General Corporation Law.

     The preceding discussion of the Company's Amended and Restated Certificate
of Incorporation and Section 145 of the Delaware General Corporation Law is not
intended to be exhaustive and is qualified in its entirety by the Company's
Amended and Restated Certificate of Incorporation and Section 145 of the
Delaware General Corporation Law.

     The Registrant has entered into indemnity agreements with its directors and
officers.  Pursuant to such agreements, the Registrant will, to the extent
permitted by applicable law, indemnify such persons against all expenses,
judgments, fines and penalties incurred in connection with the defense or
settlement of any actions brought against them by reason of the fact that they
were directors or officers of the Registrant or assumed certain responsibilities
at the direction of the Registrant.

ITEM 7.   EXEMPTION FROM REGISTRATION CLAIMED.
          ----------------------------------- 

     Not applicable.

ITEM 8.   EXHIBITS.
          -------- 

     Unless otherwise indicated below as being incorporated by reference to
another filing of the Registrant with the Commission, each of the following
exhibits is filed herewith:

     4.1  --  CRA Managed Care, Inc. 1995 Employee Stock Purchase Plan (filed as
              Exhibit No. 10.20 to the Registrant's Registration Statement on
              Form S-4, File No. 333-27105 and incorporated herein by
              reference).

     4.2  --  CRA Managed Care, Inc. 1994 Time Accelerated Restricted Stock
              Option Plan (filed as Exhibit No. 10.23 to the Registrant's
              Registration Statement on Form S-4, File No. 333-27105 and
              incorporated herein by reference).

     4.3  --  CRA Managed Care, Inc. 1994 Non-Qualified Stock Option Plan for
              Non-Employee Directors (filed as Exhibit No. 10.21 to the
              Registrant's Registration Statement on Form S-4, File No. 333-
              27105 and incorporated herein by reference).

     5.1  --  Opinion of Richard A. Parr II
 
    23.1  --  Consent of Arthur Andersen LLP

                                      -2-
<PAGE>
 
    23.2  --  Consent of Arthur Andersen LLP
 
    23.2  --  Consent of Richard A. Parr II (included in his opinion filed as
              Exhibit 5.1 hereto)
 
    24.1  --  Powers of Attorney (included in the signature pages hereto)


ITEM 9.   UNDERTAKINGS.
          ------------ 

      The Registrant 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, as amended (the "Securities Act");

          (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; 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) do not apply if the
      information required to be included in a post-effective amendment by those
      paragraphs is contained in periodic reports filed by the Registrant
      pursuant to section 13 or section 15(d) of the Exchange Act that are
      incorporated by reference in this Registration Statement.

          (2) That, for the purposes of determining any liability under the
   Securities Act, 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 that 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.

          (4) That, for purposes of determining any liability under the
   Securities Act, each filing of the Registrant's annual report pursuant to
   section 13(a) or section 15(d) of the Exchange Act 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.

          (5) Insofar as indemnification for liabilities arising under the
   Securities Act 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 Commission such
   indemnification is against public policy as expressed in the Securities 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
   Securities Act and will be governed by the final adjudication of such issue.

                                      -3-
<PAGE>
 
                                  SIGNATURES

   Pursuant to the requirements of the Securities Act of 1933, the Registrant
has duly caused this Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of Boston, State of
Massachusetts, on the 23rd day of September, 1997.

                         CONCENTRA MANAGED CARE, INC.


                         By: /s/ Richard A. Parr II
                            ---------------------------------------------------
                             Richard A. Parr II Executive Vice President, 
                             General Counsel and Secretary

   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.  Each person whose signature appears below authorizes and
appoints each of Richard A. Parr II and James M. Greenwood, and each of them
severally, acting alone and without the other, as his attorney-in-fact to
execute in the name of such person and to file any amendments to this
Registration Statement necessary or advisable to enable the Registrant to comply
with the Securities Act of 1933 and any rules, regulations and requirements of
the registration for the securities which are the subject of this Registration
Statement, which amendments may make such changes in the Registration Statement
as such attorney-in-fact may deem appropriate.

 
          Signature                    Capacity                     Date
          ---------                    --------                     ----  

/s/ Donald J. Larson          President and Chief Executive   September 23, 1997
----------------------------  Officer (Principal Executive                    
    Donald J. Larson              Officer); Director 
 
/s/ Joseph F. Pesce           Executive Vice President Chief  September 23, 1997
----------------------------  Financial Officer and Treasurer
    Joseph F. Pesce            (Principal Financial Officer 
                                  and Accounting Officer)
 
/s/ John K. Carlyle              Chairman of the Board        September 23, 1997
----------------------------         and Director
    John K. Carlyle
 
/s/ George H. Conrades                 Director               September 23, 1997
----------------------------
    George H. Conrades
 
/s/ Robert W. O'Leary                  Director               September 23, 1997
----------------------------                   
    Robert W. O'Leary                          
                                               
/s/ Robert A. Ortenzio                 Director               September 23, 1997
----------------------------                   
    Robert A. Ortenzio                         
                                               
/s/ Paul B. Queally                    Director               September 23, 1997
----------------------------                   
    Paul B. Queally                            
<PAGE>
 
/s/ Mitchell T. Rabkin, M.D.           Director               September 23, 1997
----------------------------                   
    Mitchell T. Rabkin, M.D.                   
                                               
/s/ Lois E. Silverman                  Director               September 23, 1997
----------------------------
    Lois E. Silverman
<PAGE>
 
                                 EXHIBIT INDEX
 
Exhibit                          Description of Exhibit
-------                          ----------------------
 
 4.1  --  CRA Managed Care, Inc. 1995 Employee Stock Purchase Plan (filed
          as Exhibit No. 10.20 to the Registrant's Registration Statement on
          Form S-4, File No. 333-27105 and incorporated herein by reference).
 
 4.2  --  CRA Managed Care, Inc. 1994 Time Accelerated Restricted Stock Option
          Plan (filed as Exhibit No. 10.23 to the Registrant's Registration
          Statement on Form S-4, File No. 333-27105 and incorporated herein by
          reference).
 
 4.3  --  CRA Managed Care, Inc. 1994 Non-Qualified Stock Option Plan for
          Non-Employee Directors (filed as Exhibit No. 10.21 to the Registrant's
          Registration Statement on Form S-4, File No. 333-27105 and
          incorporated herein by reference).
 
 5.1  --  Opinion of Richard A. Parr II

23.1  --  Consent of Arthur Andersen LLP
 
23.2  --  Consent of Arthur Andersen LLP

23.2  --  Consent of Richard A. Parr II (included in his opinion filed as
          Exhibit 5.1 hereto)

24.1  --  Powers of Attorney (included in the signature pages hereto)
[{"type": "S-8", "sequence": "1", "description": "FORM S-8", "secsgml_size_bytes": 20158}]
{"company-data": {"conformed-name": "CONCENTRA MANAGED CARE INC", "cik": "0001038528", "assigned-sic": "8093", "irs-number": "043363415", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-36361", "film-number": "97685272"}, "business-address": {"street1": "312 UNION WHARF", "city": "BOSTON", "state": "MA", "zip": "02109", "phone": "6173672163"}}
AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON SEPTEMBER 24, 1997
                                                 Registration No. 333-__________
================================================================================

                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549

                               _________________
                                   FORM S-8
                            REGISTRATION STATEMENT
                                     UNDER
                          THE SECURITIES ACT OF 1933
                               _________________

                         CONCENTRA MANAGED CARE, INC.
            (Exact name of registrant as specified in its charter)

         DELAWARE                                            04-3363415
(State or other jurisdiction of                           (I.R.S. Employer
 incorporation or organization)                          Identification No.)

                                312 UNION WHARF
                         BOSTON, MASSACHUSETTS  02109
         (Address of principal executive offices, including zip code)
                             ____________________

                  CONCENTRA MANAGED CARE, INC. STOCK OPTIONS

   CRA MANAGED CARE, INC. 1994 TIME ACCELERATED RESTRICTED STOCK OPTION PLAN

          CRA MANAGED CARE, INC. 1994 NON-QUALIFIED STOCK OPTION PLAN
                          FOR NON-EMPLOYEE DIRECTORS

                           (Full title of the plan)

                               DONALD J. LARSON
                     PRESIDENT AND CHIEF EXECUTIVE OFFICER
                         CONCENTRA MANAGED CARE, INC.
                                312 UNION WHARF
                         BOSTON, MASSACHUSETTS  02109
                                (617) 367-2163
           (Name, address and telephone number of agent for service)

                                   copy to:
                              RICHARD A. PARR II
                 EXECUTIVE VICE PRESIDENT AND GENERAL COUNSEL
                         CONCENTRA MANAGED CARE, INC.
                          3010 LBJ FREEWAY, SUITE 400
                              DALLAS, TEXAS 75234
                                (972) 484-2700

                        CALCULATION OF REGISTRATION FEE
=========================================================================================================== 
                                                                           Proposed
   Title of securities       Amount to be        Proposed maximum      maximum aggregate     Amount of
    to be registered          registered     offering price per unit*   offering price*   registration fee
-----------------------------------------------------------------------------------------------------------
Common Stock, $0.01 par
  value per share......... 1,382,666 shares           $32.18              $44,494,192        $13,484
----------------------------------------------------------------------------------------------------------
*    Estimated solely for purposes of calculating the registration fee in
     accordance with Rule 457(h) under the Securities Act of 1933 and based on
     the average of the high and low sales prices of the Common Stock reported
     on The Nasdaq Stock Market on September 18, 1997.

================================================================================
EXPLANATORY NOTE

     On August 29, 1997, CRA Managed Care, Inc., a Massachusetts corporation
("CRA"), merged (the "Merger") with and into a wholly-owned subsidiary of
Concentra Managed Care, Inc., a Delaware corporation (the "Registrant"),
pursuant to an Agreement and Plan of Reorganization (the "Reorganization
Agreement") dated as of April 21, 1997, by and among CRA, OccuSystems, Inc., a
Delaware corporation, and the Registrant.  Pursuant to the terms of the
Reorganization Agreement, (a) the Registrant assumed each outstanding option to
purchase common stock, par value $.01 per share, of CRA ("CRA Common Stock")
granted under the CRA Managed Care, Inc. 1994 Time Accelerated Restricted Stock
Option Plan and the CRA Managed Care, Inc. 1994 Non-Qualified Stock Option Plan
for Non-Employee Directors (the "Plans"), and (b) the assumed options became
exercisable for common stock, par value $.01 per share, of the Registrant
("Concentra Common Stock") at an exchange rate of 1.786 shares of Concentra
Common Stock for each share of CRA Common Stock. The Registrant is filing this
Registration Statement on Form S-8 to reflect the assumption by the Registrant
of each such option to purchase CRA Common Stock and the conversion of the
options to purchase CRA Common Stock into options to purchase Concentra Common
Stock in the Merger.

                                    PART II
              INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

ITEM 3.   INCORPORATION OF DOCUMENTS BY REFERENCE.
          --------------------------------------- 

     The following documents have been filed with the Securities and Exchange
Commission by the Registrant and are incorporated herein by reference and made a
part hereof:

     (a)  The Registrant's Registration Statement on Form S-4 (File No. 333-
          27105) filed on July 31, 1997;

     (b)  The Registrant's Current Report on Form 8-K filed on September 11,
          1997; and

     (c)  The description of the Concentra Common Stock, contained in Item 1 of
          the Registrant's Registration Statement on Form 8-A filed with the
          Commission pursuant to the Securities Exchange Act of 1934 (the
          "Exchange Act") on June 25, 1997 (File No. 0-22751).

     All documents subsequently filed by the Registrant pursuant to Sections
13(a), 13(c), 14 and 15(d) of the Exchange Act prior to the filing of a post-
effective amendment that indicates that all securities offered have been sold or
that deregisters all securities then remaining unsold shall also be deemed to be
incorporated by reference herein and to be a part hereof from the dates of
filing of such documents.  Any statement contained in a document incorporated or
deemed to be incorporated by reference herein shall be deemed to be modified or
superseded for purposes of this Registration Statement to the extent that a
statement contained herein or in any other subsequently filed document which
also is or is deemed to be incorporated by reference herein modifies or
supersedes such statement.  Any statement so modified or superseded shall not be
deemed, except as so modified or superseded, to constitute a part of this
Registration Statement.  Upon the written or oral request of any person to whom
a copy of this Registration Statement has been delivered, the Registrant will
provide without charge to such person a copy of any and all documents (excluding
exhibits thereto unless such exhibits are specifically incorporated by reference
into such documents) that have been incorporated by reference into this
Registration Statement but not delivered herewith.  Requests for such documents
should be addressed to Concentra Managed Care, Inc., 3010 LBJ Freeway, Suite
400, Dallas, Texas 75234, Attention: Secretary, (972) 481-7507.

ITEM 4.   DESCRIPTION OF SECURITIES.
          ------------------------- 

     Not applicable.

ITEM 5.   INTERESTS OF NAMED EXPERTS AND COUNSEL.
          -------------------------------------- 

     Not applicable.

                                      -1-
ITEM 6.   INDEMNIFICATION OF DIRECTORS AND OFFICERS.
          ----------------------------------------- 

     Article Twelfth of the Amended and Restated Certificate of Incorporation of
the Registrant provides that the Registrant shall indemnify its officers and
directors to the maximum extent allowed by the Delaware General Corporation Law.
Pursuant to Section 145 of the Delaware General Corporation Law, the Registrant
generally has the power to indemnify its present and former directors and
officers against expenses and liabilities incurred by them in connection with
any suit to which they are, or are threatened to be made, a party by reason of
their serving in those positions so long as they acted in good faith and in a
manner they reasonably believed to be in, or not opposed to, the best interests
of the Registrant, and with respect to any criminal action, so long as they had
no reasonable cause to believe their conduct was unlawful.

     With respect to suits by or in the right of the Registrant, however,
indemnification is generally limited to attorney's fees and other expenses and
is not available if the person is adjudged to be liable to the Registrant,
unless the court determines that indemnification is appropriate.  The statute
expressly provides that the power to indemnify authorized thereby is not
exclusive of any rights granted under any bylaw, agreement, vote of stockholders
or disinterested directors, or otherwise.  The Registrant also has the power to
purchase and maintain insurance for its directors and officers.  Additionally,
Article Twelfth of the Amended and Restated Certificate of Incorporation
provides that, in the event that an officer or director files suit against the
Registrant seeking indemnification of liabilities or expenses incurred, the
burden will be on the Registrant to prove that the indemnification would not be
permitted under the Delaware General Corporation Law.

     The preceding discussion of the Company's Amended and Restated Certificate
of Incorporation and Section 145 of the Delaware General Corporation Law is not
intended to be exhaustive and is qualified in its entirety by the Company's
Amended and Restated Certificate of Incorporation and Section 145 of the
Delaware General Corporation Law.

     The Registrant has entered into indemnity agreements with its directors and
officers.  Pursuant to such agreements, the Registrant will, to the extent
permitted by applicable law, indemnify such persons against all expenses,
judgments, fines and penalties incurred in connection with the defense or
settlement of any actions brought against them by reason of the fact that they
were directors or officers of the Registrant or assumed certain responsibilities
at the direction of the Registrant.

ITEM 7.   EXEMPTION FROM REGISTRATION CLAIMED.
          ----------------------------------- 

     Not applicable.

ITEM 8.   EXHIBITS.
          -------- 

     Unless otherwise indicated below as being incorporated by reference to
another filing of the Registrant with the Commission, each of the following
exhibits is filed herewith:

     4.1  --  CRA Managed Care, Inc. 1995 Employee Stock Purchase Plan (filed as
              Exhibit No. 10.20 to the Registrant's Registration Statement on
              Form S-4, File No. 333-27105 and incorporated herein by
              reference).

     4.2  --  CRA Managed Care, Inc. 1994 Time Accelerated Restricted Stock
              Option Plan (filed as Exhibit No. 10.23 to the Registrant's
              Registration Statement on Form S-4, File No. 333-27105 and
              incorporated herein by reference).

     4.3  --  CRA Managed Care, Inc. 1994 Non-Qualified Stock Option Plan for
              Non-Employee Directors (filed as Exhibit No. 10.21 to the
              Registrant's Registration Statement on Form S-4, File No. 333-
              27105 and incorporated herein by reference).

     5.1  --  Opinion of Richard A. Parr II
 
    23.1  --  Consent of Arthur Andersen LLP

                                      -2-
23.2  --  Consent of Arthur Andersen LLP
 
    23.2  --  Consent of Richard A. Parr II (included in his opinion filed as
              Exhibit 5.1 hereto)
 
    24.1  --  Powers of Attorney (included in the signature pages hereto)

ITEM 9.   UNDERTAKINGS.
          ------------ 

      The Registrant 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, as amended (the "Securities Act");

          (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; 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) do not apply if the
      information required to be included in a post-effective amendment by those
      paragraphs is contained in periodic reports filed by the Registrant
      pursuant to section 13 or section 15(d) of the Exchange Act that are
      incorporated by reference in this Registration Statement.

          (2) That, for the purposes of determining any liability under the
   Securities Act, 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 that 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.

          (4) That, for purposes of determining any liability under the
   Securities Act, each filing of the Registrant's annual report pursuant to
   section 13(a) or section 15(d) of the Exchange Act 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.

          (5) Insofar as indemnification for liabilities arising under the
   Securities Act 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 Commission such
   indemnification is against public policy as expressed in the Securities 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
   Securities Act and will be governed by the final adjudication of such issue.

                                      -3-
SIGNATURES

   Pursuant to the requirements of the Securities Act of 1933, the Registrant
has duly caused this Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of Boston, State of
Massachusetts, on the 23rd day of September, 1997.

                         CONCENTRA MANAGED CARE, INC.

                         By: /s/ Richard A. Parr II
                            ---------------------------------------------------
                             Richard A. Parr II Executive Vice President, 
                             General Counsel and Secretary

   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.  Each person whose signature appears below authorizes and
appoints each of Richard A. Parr II and James M. Greenwood, and each of them
severally, acting alone and without the other, as his attorney-in-fact to
execute in the name of such person and to file any amendments to this
Registration Statement necessary or advisable to enable the Registrant to comply
with the Securities Act of 1933 and any rules, regulations and requirements of
the registration for the securities which are the subject of this Registration
Statement, which amendments may make such changes in the Registration Statement
as such attorney-in-fact may deem appropriate.

 
          Signature                    Capacity                     Date
          ---------                    --------                     ----  

/s/ Donald J. Larson          President and Chief Executive   September 23, 1997
----------------------------  Officer (Principal Executive                    
    Donald J. Larson              Officer); Director 
 
/s/ Joseph F. Pesce           Executive Vice President Chief  September 23, 1997
----------------------------  Financial Officer and Treasurer
    Joseph F. Pesce            (Principal Financial Officer 
                                  and Accounting Officer)
 
/s/ John K. Carlyle              Chairman of the Board        September 23, 1997
----------------------------         and Director
    John K. Carlyle
 
/s/ George H. Conrades                 Director               September 23, 1997
----------------------------
    George H. Conrades
 
/s/ Robert W. O'Leary                  Director               September 23, 1997
----------------------------                   
    Robert W. O'Leary                          
                                               
/s/ Robert A. Ortenzio                 Director               September 23, 1997
----------------------------                   
    Robert A. Ortenzio                         
                                               
/s/ Paul B. Queally                    Director               September 23, 1997
----------------------------                   
    Paul B. Queally
/s/ Mitchell T. Rabkin, M.D.           Director               September 23, 1997
----------------------------                   
    Mitchell T. Rabkin, M.D.                   
                                               
/s/ Lois E. Silverman                  Director               September 23, 1997
----------------------------
    Lois E. Silverman
EXHIBIT INDEX
 
Exhibit                          Description of Exhibit
-------                          ----------------------
 
 4.1  --  CRA Managed Care, Inc. 1995 Employee Stock Purchase Plan (filed
          as Exhibit No. 10.20 to the Registrant's Registration Statement on
          Form S-4, File No. 333-27105 and incorporated herein by reference).
 
 4.2  --  CRA Managed Care, Inc. 1994 Time Accelerated Restricted Stock Option
          Plan (filed as Exhibit No. 10.23 to the Registrant's Registration
          Statement on Form S-4, File No. 333-27105 and incorporated herein by
          reference).
 
 4.3  --  CRA Managed Care, Inc. 1994 Non-Qualified Stock Option Plan for
          Non-Employee Directors (filed as Exhibit No. 10.21 to the Registrant's
          Registration Statement on Form S-4, File No. 333-27105 and
          incorporated herein by reference).
 
 5.1  --  Opinion of Richard A. Parr II

23.1  --  Consent of Arthur Andersen LLP
 
23.2  --  Consent of Arthur Andersen LLP

23.2  --  Consent of Richard A. Parr II (included in his opinion filed as
          Exhibit 5.1 hereto)

24.1  --  Powers of Attorney (included in the signature pages hereto)