Exhibit 4 WAIVER AND NINTH AMENDMENT -------------------------- March 7, 1995 Citibank, N.A., as Agent c/o Citicorp North America, Inc. 1400 Trammell Crow Center 2001 Ross Avenue Dallas, TX 75201 Attention: Mr. Richard J. Sirchio RE: Waiver and Ninth Amendment -------------------------- Ladies and Gentlemen: Reference is made to the Amended and Restated Credit Agreement among Continental Medical Systems, Inc., a Delaware corporation ("Borrower"), the Lenders from time to time party thereto (the "Lenders"), NationsBank of Tennessee, N.A., a national banking association, successor by assignment to Maryland National Bank, as Co-Agent, and Citibank, N.A., a national banking association, as Agent ("Agent"), dated as of August 28, 1991, as amended as of December 31, 1991, March 31, 1992, July 8, 1992, September 23, 1992, February 26, 1993, March 26, 1993, December 10, 1993 and June 17, 1994 (the "Credit Agreement"). Unless otherwise defined herein, terms are used herein as defined in the Credit Agreement. The purpose of this letter is to request the agreement of Agent and the Majority Lenders to waive the condition set forth in Section 6.20(c)(i)(B) of the Credit Agreement (for fiscal quarters beginning after December 31, 1994) and to amend Section 6.20(c)(iii)(A) of the Credit Agreement in connection with Borrower's purchase from time to time after the date hereof of Debt outstanding under the Subordinate Debt Indentures. To date, Borrower has spent an aggregate of approximately $64.35 million to repurchase approximately $71.9 million principal amount of such Debt (including approximately $19.5 million spent during the current fiscal quarter) in accordance with Section 6.20 of the Credit Agreement. The amendment requested for Section 6.20(c)(iii)(A) of the Credit Agreement is that the ratio in such section be changed from "0.75 to 1.00" to "1.15 to 1.00". In addition, the Credit Agreement would be further amended to provide for a related amendment fee by adding a new Section 2.03(i) to read as follows: (i) The Borrower agrees to pay to Agent, for the account of each Lender who executes the Ninth Amendment to this Agreement, an amendment fee equal to 0.075% times the amount of such Lender's Specified Percentage of the Commitment as of the date of the Ninth Amendment to this Agreement, payable on or before August 31, 1995, unless on or before such date each Lender (or its assignee pursuant to Section 9.04(a) hereof) consents in writing to an extension of the Conversion Date for at least one year. The Borrower acknowledges that the Lenders have no obligation to consent to any such extension. In order to induce Agent and the Lenders to agree to such waiver and amendments, Borrower hereby represents and warrants that (a) there exists no Default or Event of Default under the Credit Agreement on the date hereof, (b) the representations and warranties set forth in Article V of the Credit Agreement are true and correct on the date hereof, and (c) Borrower has complied with all agreements and conditions to be complied with by it under the Credit Agreement and the other Loan Papers by the date hereof. Borrower also agrees that such waiver shall extend only to the requirements of the Credit Agreement to the limited extent expressly provided herein and shall not be deemed to extend to any other or additional state of facts or circumstance or any other covenant, obligation, representation or warranty of any party to the Credit Agreement or the other Loan Papers. Borrower also agrees that, except as waived and amended hereby, the Credit Agreement and the other Loan Papers, and each term, condition, covenant, obligation, representation and warranty thereunder, shall otherwise be and remain in full force and effect. Borrower and, by their signatures, Agent and the Lenders acknowledge and agree (a) that this letter embodies the entire agreement of the parties, may not be contradicted by evidence of prior, contemporaneous or subsequent oral agreements, and supersedes any prior agreements or understandings, with respect to the subject matter hereof and (b) that the waiver and amendments requested hereby shall be governed by and construed in accordance with the laws of the State of New York and the United States of America. 2 We ask Agent and the Lenders to confirm their agreement to the waiver and amendments requested hereby by signing the enclosed counterparts of this letter in the space provided below, such waiver and amendments to be effective when signed by the Majority Lenders and consented to by the Subsidiary Guarantors and Borrowing Subsidiaries listed on the consent and agreement attached hereto. Sincerely, CONTINENTAL MEDICAL SYSTEMS, INC., a Delaware corporation By: Dennis L. Lehman, Senior Vice President WAIVER GRANTED AND AMENDMENT AGREED TO: Agent: CITIBANK, N.A., as Agent Dated: March 7, 1995 By: /s/ Barbara A. Cohen ------------------------------------ Barbara A. Cohen Title: Vice President Lenders: CITIBANK, N.A., individually Dated: March 7, 1995 By: /s/ Barbara A. Cohen ------------------------------------ Barbara A. Cohen Title: Vice President NATIONSBANK OF TENNESSEE, N.A. Dated: March 8, 1995 (formerly known as Sovran Bank/Tennessee) By: /s/ Patrick J. Neal ------------------------------------ Patrick J. Neal Title: Assistant Vice President [SIGNATURES CONTINUED ON NEXT PAGE] MELLON BANK, N.A. Dated: March 8, 1995 By: /s/ Daniel T. Weick ------------------------------------ Daniel T. Weick Title: Assistant Vice President PNC BANK, NATIONAL ASSOCIATION Dated: March 7, 1995 (formerly known as Pittsburgh National Bank) By: /s/ Robert J. Courie ------------------------------------ Robert J. Courie Title: Commercial Banking Officer THE BANK OF CALIFORNIA, N.A. Dated: March 7, 1995 By: /s/ Albert W. Kelley ------------------------------------ Albert W. Kelley Title: Vice President THE CHASE MANHATTAN BANK, N.A. Dated: March 7, 1995 By: /s/ Nina W. Lihn ------------------------------------ Nina W. Lihn Title: Managing Director 3 CORESTATES BANK, N.A. Dated: March 7, 1995 By: /s/ Paul Hogan ---------------------------------- Paul Hogan Title: Assistant Vice President 4 CONSENT AND AGREEMENT The undersigned, being Subsidiary Guarantors and Borrowing Subsidiaries (each as defined in the Credit Agreement), hereby consent and agree, as of March 7, 1995, to the foregoing Waiver and Ninth Amendment to the Credit Agreement and hereby confirm their respective guarantees and grants of security interests and other obligations under the Loan Papers (as defined in the Credit Agreement), which shall remain in full force and effect and be applicable to the Credit Agreement and the Loan Papers, as waived and amended by the foregoing Waiver and Ninth Amendment. APCO MEDICAL LABORATORIES, INC. BATON ROUGE REHAB, INC. BRAINTREE REHABILITATION VENTURES, INC. CENTRAL ARIZONA REHABILITATION HOSPITAL, INC. CENTRAL ARKANSAS OUTPATIENT CENTERS, INC. CHICO REHABILITATION HOSPITAL, INC. CLEAR LAKE REHABILITATION HOSPITAL, INC. CMS ADMINISTRATIVE SERVICES, INC. (formerly Capital Rehabilitation Hospital, Inc.) (formerly New London Rehabilitation Hospital, Inc.) CMS ALEXANDRIA REHABILITATION, INC. CMS BATON ROUGE REHABILITATION, INC. CMS BEAUMONT REHABILITATION, INC. CMS CONTRA COSTA CLINIC, INC. (formerly Unit Management Group, Inc., formerly Northeast Wisconsin Rehabilitation Hospital, Inc.) CMS DENVER REHABILITATION, INC. CMS DEVELOPMENT AND MANAGEMENT COMPANY, INC. CMS ELIZABETHTOWN, INC. CMS FAYETTEVILLE REHABILITATION, INC. CMS FORT WORTH REHABILITATION, INC. CMS FRESNO REHABILITATION, INC. CMS HOUSTON REHABILITATION, INC. CMS KANSAS CITY REHABILITATION, INC. CMS OF OHIO, INC. CMS OUTPATIENT CENTERS OF NORTH TEXAS, INC. CMS OUTPATIENT CENTERS OF SOUTH TEXAS, INC. CMS OUTPATIENT REHABILITATION SERVICES, INC. (formerly Fairfield Rehabilitation Hospital, Inc.) CMS PENNSYLVANIA, INC. (formerly CMS Pennsylvania Rehabilitation, Inc.) CMS REHABILITATION CENTER OF HIALEAH, INC. CMS RUSTON REHABILITATION, INC. CMS SAN DIEGO REHAB, INC. CMS SHERWOOD REHABILITATION, INC. 5 CMS SOUTH MIAMI REHAB, INC. CMS SPORTSMED CLINIC, INC. (formerly CMS Los Gatos, Inc.) CMS THERAPIES, INC. (formerly Premier Rehabilitation Services, Inc.) (formerly Communi-Care of America, Inc.) (SPECIFIED DEBT) CMS THERAPIES MANAGEMENT, INC. (formerly Premier Rehabilitation Management, Inc.) (formerly Communi-Care/Pro Rehab Management, Inc.) (formerly Alta Petens, Inc.) (SPECIFIED DEBT) CMS THERAPIES PROVIDER, INC. (formerly Premier Rehab, Inc.) (formerly Pro-Rehab, Inc.) (SPECIFIED DEBT) CMS THERAPY SERVICES, INC. (formerly Advanced Care Medicine, Inc.) CMS TOPEKA REHABILITATION, INC. CMS TRI-CITIES REHABILITATION HOSPITAL, INC. CMS TUSTIN REHABILITATION, INC. CMS WICHITA REHABILITATION, INC. CMS WORK-ABLE, INC. CMS WORK-ABLE OF PARAGOULD, INC. CMS WORKNET OF BATON ROUGE, INC. CMSI SYSTEMS OF TEXAS, INC. COLORADO OUTPATIENT CENTERS, INC. (formerly CMS Kokomo Rehabilitation, Inc.) COMPHEALTH, INC. COMPHEALTH MEDICAL STAFFING, INC. CONTINENTAL MEDICAL OF ARIZONA, INC. CONTINENTAL MEDICAL OF COLORADO, INC. CONTINENTAL MEDICAL OF KENTUCKY, INC. CONTINENTAL MEDICAL OF PALM BEACH, INC. CONTINENTAL MEDICAL SYSTEMS OF FLORIDA, INC. CONTINENTAL REHAB OF W.F., INC. CONTINENTAL REHABILITATION HOSPITAL OF ARIZONA, INC. ELIZABETHTOWN MANAGEMENT COMPANY, INC. FAIRLAND NURSING AND RETIREMENT HOME, INC. GREAT PLAINS REHABILITATION HOSPITAL, INC. HCA WESLEY REHABILITATION CLINIC OF LIBERAL, INC. (formerly CMS Chico Rehabilitation, Inc.) HCA WESLEY REHABILITATION HOSPITAL, INC. (SPECIFIED DEBT) HIALEAH CONVALESCENT CENTERS, INC. INDIANA OUTPATIENT CENTERS, INC. 6 INNOVATIVE HEALTH ALLIANCES, INC. (formerly InterNet Health Alliance, Inc.) (formerly Memphis Rehabilitation Hospital, Inc.) K.C. REHABILITATION HOSPITAL, INC. (SPECIFIED DEBT) KANSAS OUTPATIENT CENTERS, INC. KENTFIELD HOSPITAL CORPORATION KOKOMO REHABILITATION HOSPITAL, INC. LOUISIANA OUTPATIENT CENTERS, INC. MANAGEMENT CARE THERAPY SERVICES, INC. MARYLAND REHABILITATION HOSPITAL, INC. MID-AMERICA OUTPATIENT CENTERS, INC. (formerly Pikeville Rehabilitation Hospital, Inc.) NEVADA REHABILITATION HOSPITAL, INC. NORTHEAST ARKANSAS REHABILITATION UNIT, INC. NORTHEAST OKLAHOMA REHABILITATION HOSPITAL, INC. NORTH LOUISIANA REHABILITATION CENTER, INC. (SPECIFIED DEBT) NORTHERN VIRGINIA REHABILITATION HOSPITAL, INC. (formerly Iliff Nursing Home, Inc.) ORANGE REHABILITATION HOSPITAL, INC. P.G. REHAB HOSPITAL, INC. PALM SPRINGS REHABILITATION HOSPITAL, INC. PARK MANOR NURSING HOME, INC. PHYSICAL THERAPY SOURCE, INC. (formerly Hartford Rehabilitation Hospital, Inc.) PINELLAS-RODRIGUEZ REHABILITATIVE ASSOCIATES LIMITED, INC. PREMIER ANCILLARY SERVICES, INC. (formerly RMS Clinics, Inc. and Continental Rehabilitation of Alexandria, Inc.) PRO THERAPY OF AMERICA, INC. PROFESSIONAL MANAGEMENT RESOURCES, INC. PROFESSIONAL THERAPY INTERNATIONAL, INC. PROFESSIONAL THERAPY STAFFING, INC. RCM MANAGEMENT COMPANY, INC. REHAB JOINT VENTURES, INC. REHAB RESOURCES, INC. (formerly Rehab America Management Services, Inc.) REHABILITATIVE ASSOCIATES, INC. REHABILITATION HOSPITAL OF COLORADO SPRINGS, INC. REHABILITATION HOSPITAL OF FORT WAYNE, INC. REHABILITATION HOSPITAL OF NEVADA - LAS VEGAS, INC. (formerly SR Sub, Inc.) REHABILITATION HOSPITAL OF PLANO, INC. 7 REHABWORKS, INC. REHABWORKS OF CALIFORNIA, INC. (formerly, California Therapy, Inc.) ROMANO REHABILITATION HOSPITAL, INC. SD ACQUISITION CORPORATION SD PARTNERS, INC. SAN BERNARDINO REHABILITATION HOSPITAL, INC. SELECTREHAB, INC. (formerly CMS Unit Management, Inc.) SHERWOOD REHABILITATION HOSPITAL, INC. SIERRA PAIN AND OCCUPATIONAL REHABILITATION CENTER, INC. (formerly Coastal Empire Rehabilitation Hospital, Inc.) SOUTHEAST TEXAS REHABILITATION HOSPITAL, INC. TARRANT COUNTY REHABILITATION HOSPITAL, INC. TERRE HAUTE REHABILITATION HOSPITAL, INC. THE KELTON CORPORATION THE NURSING HOME AT CHEVY CHASE, INC. THE REHAB SOURCE, INC. TULSA REHABILITATION HOSPITAL, INC. TYLER REHABILITATION HOSPITAL, INC. WESTERN NEURO CARE, INC. WESTERN NEUROLOGIC RESIDENTIAL CENTERS, INC. WESTERN NEURO RESIDENTIAL, INC. WICHITA FALLS REHABILITATION HOSPITAL, INC. BEAUMONT REHAB ASSOCIATES LIMITED PARTNERSHIP (SPECIFIED DEBT) By Southeast Texas Rehabilitation Hospital, Inc., General Partner CENTRAL ARKANSAS REHABILITATION ASSOCIATES, L.P. (SPECIFIED DEBT) By Sherwood Rehabilitation Hospital, Inc., General Partner CENTRAL LOUISIANA REHAB ASSOCIATES, L.P. (SPECIFIED DEBT) By CMS Alexandria Rehabilitation, Inc., General Partner CMS REHAB OF W.F., L.P. (SPECIFIED DEBT) By Continental Rehab of W.F., Inc., General Partner CMS REHABILITATION CENTER OF SOUTH MIAMI (SPECIFIED DEBT) By CMS South Miami Rehab, Inc., General Partner COLLIN COUNTY REHAB ASSOCIATES LIMITED PARTNERSHIP (SPECIFIED DEBT) By Rehabilitation Hospital of Plano, Inc., General Partner HELMWOOD ASSOCIATES LIMITED PARTNERSHIP (SPECIFIED DEBT) By CMS Elizabethtown, Inc., General Partner HOUSTON REHABILITATION ASSOCIATES (SPECIFIED DEBT) By Romano Rehabilitation Hospital, Inc., General Partner KOKOMO REHABILITATION HOSPITAL, L.P. 8 By Kokomo Rehabilitation Hospital, Inc., General Partner LAKEVIEW REHABILITATION GROUP PARTNERS (SPECIFIED DEBT) By Continental Medical Of Kentucky, Inc., General Partner MARYLAND REHAB ASSOCIATES, L.P. By Maryland Rehabilitation Hospital, Inc., General Partner MEMPHIS REHAB ASSOCIATES, LIMITED PARTNERSHIP (SPECIFIED DEBT) By CMS Tri-Cities Rehabilitation Hospital, Inc., General Partner NORTHEAST OKLAHOMA REHAB ASSOCIATES, L.P. By Northeast Oklahoma Rehabilitation Hospital, Inc., General Partner NORTHERN RHODE ISLAND REHAB MANAGEMENT ASSOCIATES, L.P. (SPECIFIED DEBT) By Braintree Rehabilitation Ventures, Inc., General Partner NORTHWEST ARKANSAS REHABILITATION ASSOCIATES (SPECIFIED DEBT) By CMS Fayetteville Rehabilitation, Inc., General Partner ) PHYSICAL THERAPY AND SPORTS MEDICINE CENTER PARTNERSHIP (SPECIFIED DEBT By Pro Therapy of America, Inc., General Partner PRIDE/BRAINTREE JOINT VENTURE By Braintree Rehabilitation Ventures, Inc., General Partner REHAB HOSPITAL OF FORT WAYNE GENERAL PARTNERSHIP (SPECIFIED DEBT) By Rehabilitation Hospital of Fort Wayne, Inc. REHABILITATION HOSPITAL OF NEVADA - LAS VEGAS, L.P. By Rehabilitation Hospital of Nevada- Las Vegas, Inc., General Partner RENO REHAB ASSOCIATES, LIMITED PARTNERSHIP By Nevada Rehabilitation Hospital, Inc., General Partner SAN BERNARDINO REHABILITATION HOSPITAL (SPECIFIED DEBT) By San Bernardino Rehabilitation Hospital, Inc., General Partner SAN DIEGO HEALTH ASSOCIATES LIMITED PARTNERSHIP By SD Acquisition Corporation, General Partner SAN DIEGO REHAB LIMITED PARTNERSHIP (SPECIFIED DEBT) By San Diego Rehabilitation Associates, General Partner By CMS San Diego Rehab, Inc., General Partner SAN DIEGO REHABILITATION ASSOCIATES (SPECIFIED DEBT) By CMS San Diego Rehab, Inc., General Partner SAN JOAQUIN VALLEY REHABILITATION HOSPITAL, A DELAWARE LIMITED 9 PARTNERSHIP (SPECIFIED DEBT) By Orange Rehabilitation Hospital, Inc., General Partner SOUTHERN ARIZONA REGIONAL REHABILITATION HOSPITAL, L.P. (SPECIFIED DEBT) By Continental Rehabilitation Hospital of Arizona, Inc., General Partner SPORTSMED ASSOCIATES (SPECIFIED DEBT) By CMS Sportsmed Clinic, Inc., General Partner TERRE HAUTE REGIONAL REHABILITATION HOSPITAL, L.P. (SPECIFIED DEBT) By Terre Haute Rehabilitation Hospital, Inc., General Partner TRI-CITIES REHABILITATION HOSPITAL, L.P. (SPECIFIED DEBT) By CMS Tri-Cities Rehabilitation Hospital, Inc., General Partner TULSA REHAB HOSPITAL, L.P. By Tulsa Rehabilitation Hospital, Inc., General Partner TYLER REHAB ASSOCIATES, L.P. (SPECIFIED DEBT) By Tyler Rehabilitation Hospital, Inc., General Partner WEST GABLES REHABILITATION HOSPITAL, LTD. (formerly South Dade Nursing Home, Ltd.) (SPECIFIED DEBT) By Continental Medical Systems of Florida, Inc., General Partner By: /s/ Dennis L. Lehman ----------------------------------- Dennis L. Lehman, Vice President ACMED THERAPY TECHNOLOGIES CORP. CHS THERAPY TECHNOLOGIES CORP. CMS CAPITAL VENTURES, INC. CMS REHAB TECHNOLOGIES CORP. COA THERAPY TECHNOLOGIES CORP. REHAB CONCEPTS CORP. RWI THERAPY TECHNOLOGIES CORP. VTA THERAPY TECHNOLOGIES CORP. (formerly CMS Appleton Rehabilitation, Inc.) By: /s/ William L. Pegler ------------------------------------ William L. Pegler, Vice President KANSAS REHABILITATION HOSPITAL, INC. (SPECIFIED DEBT) By: /s/ Anthony F. Misitano ------------------------------------ Anthony F. Misitano, Vice President CMS SAN DIEGO SURGICAL, INC. By: /s/ David G. Nation ------------------------------------ David G. Nation, Vice President 10 CMS PHYSICIAN SERVICES, INC. (formerly CMS Washington Rehabilitation, Inc.) (formerly Ranier Regional Rehabilitation Hospital, Inc.) ENCOMPUS, INC. KRON CLINICAL SERVICES, L.P. (SPECIFIED DEBT) By CMS Physician Services, Inc., General Partner VTA MANAGEMENT SERVICES, INC. By: /s/ Dennis L. Lehman ------------------------------------ Dennis L. Lehman, Treasurer LAFAYETTE REHABILITATION HOSPITAL, INC. (formerly New Bern Rehabilitation Hospital, Inc.) LAFAYETTE REHAB ASSOCIATES, LIMITED PARTNERSHIP By Lafayette Rehabilitation Hospital, Inc., General Partner By: /s/ Edward T. Stinson ----------------------------------- Edward T. Stinson, President MANCOR MEDICAL MANAGEMENT COMPANY, INC. MEDICAL MANAGEMENT ASSOCIATES, INC. By: /s/ H. Ted Levenson ----------------------------------- H. Ted Levenson, President REHAB CONNECTION, INC. THERAPY SOURCE, INC. By: /s/ Deborah Myers Welsh ----------------------------------- Deborah Myers Welsh, Vice President 11