FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): December 3, 2004

SELECT MEDICAL CORPORATION

4716 Old Gettysburg Road, P.O. Box 2034, Mechanicsburg, PA 17055

(717) 972-1100

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

     o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

     o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

     o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

     o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 1.01 Entry into a Material Definitive Agreement

     On December 3, 2004, Select Medical Corporation (the “Company”) and certain lenders entered into the Tenth Amendment and Consent (the “Amendment”) to the Company’s credit agreement dated as of September 22, 2000, as amended, (the “Credit Agreement”) among the Company, Canadian Back Institute Limited, the Lenders party thereto, JP Morgan Chase Bank, N.A., as US Agent and US Collateral Agent, JP Morgan Chase Bank, Toronto Branch, as Canadian Agent and Canadian Collateral Agent, Banc of America Securities, LLC, as Syndication Agent, and CIBC, Inc., as Documentation Agent.

     Pursuant to the Amendment, certain provisions of the Credit Agreement were amended, including the definition of “Permitted Acquisition”, to permit the acquisition of SemperCare, Inc. by the Company pursuant to the terms of the Agreement and Plan of Merger and Reorganization dated as of November 19, 2004 by and among the Company, Camp Hill Acquisition Corp., SemperCare, Inc. and Jeffrey J. Collinson, as Stockholders’ Agent.

     A copy of the Amendment is attached hereto as Exhibit 10.1 and incorporated herein by reference.

Item 9.01 Financial Statements and Exhibits

     (c) Exhibits.

SIGNATURE

     Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

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