Exhibit 4.3(d) GUARANTOR ASSUMPTION AGREEMENT May 11, 1999 Reference is hereby made to the Purchase Agreement, dated April 30, 1999 (the "Agreement"), between Healthtrust, Inc.-The Hospital Company ("Healthtrust") and the Purchasers named therein, the Triad Assumption Agreement, dated May 11, 1999, between Healthtrust and Triad Hospitals, Inc. ("Triad") and the Holdings Assumption Agreement, dated May 11, 1999, between Triad and Triad Hospitals Holdings, Inc. Unless otherwise defined herein, terms defined in the Agreement and used herein shall have the meanings given them in the Agreement. Each of the undersigned parties hereby unconditionally and irrevocably expressly assumes, confirms and agrees to perform and observe as a "Guarantor" each and any of the covenants, agreements, terms, conditions, obligations, appointments, duties, promises and liabilities of the "Guarantors" under the Agreement. Each of the undersigned hereby agrees to promptly execute and deliver any and all further documents and take such further action as any other undersigned party or the Representatives (as defined in the Agreement) may reasonably require to effect the purpose of this Guarantor Assumption Agreement. This Guarantor Assumption Agreement shall be governed by and construed in accordance with the laws of the State of New York. ALICE HOSPITAL, LLC By: APS MEDICAL, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President ALICE SURGEONS, LLC By: APS MEDICAL, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President THE SURGICAL HOSPITAL OF AMARILLO, LTD. By: GENERAL PARTNER: SURGICARE OF AMARILLO, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President APS MEDICAL, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President ARIZONA ASC MANAGEMENT, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President ARIZONA MEDCO, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 2 BEAUCO, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President BEAUMONT MEDICAL CENTER, L.P. By: GENERAL PARTNER: BEAUMONT REGIONAL, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President BEAUMONT REGIONAL, LLC By: BEAUCO, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President BRAZOS MEDCO, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 3 BRAZOS REGIONAL INTEGRATED DELIVERY GROUP By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President BRAZOS VALLEY OF TEXAS, L.P. By: GENERAL PARTNER: BRAZOS VALLEY SURGICAL CENTER, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President BRAZOS VALLEY SURGICAL CENTER, LLC By: BRAZOS MEDCO, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 4 BROWNWOOD HOSPITAL, L.P. By: GENERAL PARTNER: BROWNWOOD MEDICAL CENTER, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President BROWNWOOD MEDICAL CENTER, LLC By: SOUTHERN TEXAS MEDICAL CENTER, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President BVSC, LLC By: BRAZOS MEDCO, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President CARLSBAD MEDICAL CENTER, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 5 CLAREMORE PHYSICIANS, LLC By: TRIAD HOLDINGS II, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President CLAREMORE REGIONAL HOSPITAL, LLC By: TRIAD HOLDINGS II, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President CLINICO, LLC By: TRIAD HOLDINGS II, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President COLLEGE STATION DIAGNOSTIC CLINIC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 6 COLLEGE STATION HOSPITAL, L.P. By: GENERAL PARTNER: COLLEGE STATION MEDICAL CENTER, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President COLLEGE STATION MEDICAL CENTER, LLC By: COLLEGE STATION MERGER, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President COLLEGE STATION MERGER, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President CORONADO HOSPITAL, LLC By: CORONADO MEDICAL, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 7 CORONADO MEDICAL, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President CRESTWOOD HEALTHCARE, L.P. By: GENERAL PARTNER: CRESTWOOD HOSPITAL & NURSING HOME, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President CRESTWOOD HOSPITAL & NURSING HOME, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President CRESTWOOD HOSPITAL HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 8 CSDS, LLC By: TRIAD HOLDINGS III, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President CSMC, LLC By: COLLEGE STATION MERGER, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President DALLAS PHY SERVICE, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President DALLAS PHYSICIAN PRACTICE, L.P. By: GENERAL PARTNER: DFW PHYSERV, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 9 DAY SURGERY, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President DEQUEEN HEALTH SERVICES, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President DEQUEEN REGIONAL MEDICAL CENTER, LLC By: DEQUEEN HEALTH SERVICES, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President DETAR HOSPITAL, LLC By: VHC MEDICAL, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 10 DFW PHYSERV, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President DOCTORS HOSPITAL OF LAREDO, LIMITED PARTNERSHIP By: GENERAL PARTNER: LAREDO INTEREST, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President DOCTORS MEDICAL CENTER, LLC By: MID-PLAINS, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President DOCTORS OF LAREDO, LLC By: MID-PLAINS, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 11 DOUGLAS MEDICAL CENTER, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President E.D. CLINICS, LLC By: ARIZONA MEDCO, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President EL DORADO MEDICAL CENTER, LLC By: ARIZONA MEDCO, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President EYE CARE SURGICARE, LTD. By: GENERAL PARTNER: SURGICARE OF INDEPENDENCE, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 12 EYE INSTITUTE OF SOUTHERN ARIZONA, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President GALLAGHER PARK SURGICENTER, LTD. By: GENERAL PARTNER: SURGICARE OF SHERMAN, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President GCMC, LLC By: WHARTON MEDCO, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President GH TEXAS, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 13 GHC HOSPITAL, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President GHC HUNTINGTON BEACH, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President GULF COAST HOSPITAL, L.P. By: GENERAL PARTNER: GULF COAST MEDICAL CENTER, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President GULF COAST MEDICAL CENTER, LLC By: WHARTON MEDCO, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 14 HDP DEQUEEN, LLC By: TRIAD HOLDINGS II, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President HDP WOODLAND HEIGHTS, L.P. By: GENERAL PARTNER: HDP WOODLAND PROPERTY, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President HDP WOODLAND PROPERTY, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President HDPWH, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 15 HEALDSBURG OF CALIFORNIA, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President HOBBS MEDCO, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President HOBBS PHYSICIAN PRACTICE, LLC By: HOBBS MEDCO, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President HOSPITAL OF BEAUMONT, LLC By: BEAUCO, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 16 HUNTINGTON ASSOCIATES By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President HUNTINGTON BEACH AMDECO, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President HUNTINGTON INTERCOMMUNITY HOSPITAL By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President INDEPENDENCE REGIONAL HEALTH CENTER, LLC By: TRIAD HOLDINGS II, LLC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 17 KANSAS CITY SURGICENTER, LTD. By: GENERAL PARTNER: DAY SURGERY, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President KENSINGCARE, LLC By: TRIAD HOLDINGS II, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President LAKE AREA SURGICARE, A PARTNERSHIP IN COMMENDUM, A LOUISIANA LIMITED PARTNERSHIP By: GENERAL PARTNER: SURGICARE OUTPATIENT CENTER OF LAKE CHARLES, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 18 LAREDO HOSPITAL, L.P. By: GENERAL PARTNER: DOCTORS OF LAREDO, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President LAREDO INTEREST, LLC By: TRIAD HOLDINGS III, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President LEA REGIONAL HOSPITAL, LLC By: HOBBS MEDCO, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President LONGVIEW MEDICAL CENTER, L.P. By: GENERAL PARTNER: REGIONAL HOSPITAL OF LONGVIEW, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 19 LONGVIEW MERGER, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President LRH, LLC By: LONGVIEW MERGER, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President LS PSYCHIATRIC, LLC By: TRIAD HOLDINGS III, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President MCI PANHANDLE SURGICAL, L.P. By: GENERAL PARTNER: PANHANDLE PROPERTY, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 20 MEDICAL CENTER AT TERRELL, LLC By: TIRAD-MEDICAL CENTER AT TERRELL SUBSIDIARY, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President MEDICAL CENTER OF BROWNWOOD, LLC By: SOUTHERN TEXAS MEDICAL CENTER, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President MEDICAL CENTER OF SHERMAN, LLC By: TRIAD-MEDICAL CENTER OF SHERMAN SUBSIDARY, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President MEDICAL HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 21 MEDICAL MANAGEMENT, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President MEDICAL PARK HOSPITAL, LLC By: TRIAD HOLDINGS II, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President MEDICAL PARK MSO, LLC By: TRIAD HOLDINGS II, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President MEMORIAL HOSPITAL, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 22 MID-PLAINS, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President MIDWEST PSYCHIATRIC CENTER, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President MISSION BAY MEMORIAL HOSPITAL, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President MISSOURI HEALTHSERV, LLC By: TRIAD HOLDINGS III, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 23 NAVARRO HOSPITAL, L.P. By: GENERAL PARTNER: NAVARRO REGIONAL, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President NAVARRO REGIONAL, LLC By: TRIAD-NAVARRO REGIONAL HOSPITAL SUBSIDIARY, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President NORTH ANAHEIM SURGICENTER, LTD. By: GENERAL PARTNER: SURGICARE OF NORTH ANAHEIM, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 24 NORTHWEST HOSPITAL, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President NRH, LLC By: TRIAD-NAVARRO REGIONAL HOSPITAL SUBSIDIARY, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President ODESSA, LLC By: TRIAD HOLDINGS II, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President OREGON HEALTHCORP, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 25 OSBORN AMBULATORY SURGICAL CENTER, LTD. By: GENERAL PARTNER: SAMARITAN SURGICENTERS OF ARIZONA, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President OVERLAND PARK REGIONAL MEDICAL CENTER, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President PACIFIC EAST DIVISION OFFICE, L.P. By: GENERAL PARTNER: TRIAD TEXAS, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President PACIFIC GROUP ASC DIVISION, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 26 PACIFIC PHYSICIANS SERVICES, LLC By: SPROCKET MEDICAL MANAGEMENT, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President PACIFIC WEST DIVISION OFFICE, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President PALM DRIVE HOSPITAL, L.P. By: GENERAL PARTNER: PALM DRIVE MEDICAL CENTER, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President PALM DRIVE MEDICAL CENTER, LLC By: SEBASTOPOL, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 27 PANHANDLE MEDICAL CENTER, LLC TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President PANHANDLE SURGICAL HOSPITAL, L.P. By: GENERAL PARTNER: PANHANDLE MEDICAL CENTER, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President PAMPA HOSPITAL, L.P. By: GENERAL PARTNER: PAMPA MEDICAL CENTER, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 28 PAMPA MEDICAL CENTER, LLC By: CORONADO MEDICAL, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President PANHANDLE PROPERTY, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President PANHANDLE, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President PDMC, LLC By: SEBASTOPOL, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 29 PECOS VALLEY OF NEW MEXICO, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President PHOENIX AMDECO, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President PHOENIX SURGICAL, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President PHYSICIANS AND SURGEONS HOSPITAL OF ALICE, L.P. By: GENERAL PARTNER: ALICE HOSPITAL, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 30 PHYS-MED, LLC By: TRIAD HOLDINGS II, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President PINEY WOODS HEALTHCARE SYSTEM, L.P. By: GENERAL PARTNER: WOODLAND HEIGHTS MEDICAL CENTER, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President PRIMARY MEDICAL, LLC By: TRIAD HOLDINGS II, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 31 PSYCHIATRIC SERVICES OF PARADISE VALLEY, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President REGIONAL EMPLOYEE ASSISTANCE PROGRAM, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President REGIONAL HOSPITAL OF LONGVIEW, LLC By: LONGVIEW MERGER, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President SACMC, LLC By: SAN ANGELO MEDICAL, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 32 SAMARITAN SURGICENTERS OF ARIZONA, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President SAN ANGELO COMMUNITY MEDICAL CENTER, LLC By: SAN ANGELO MEDICAL, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President SAN ANGELO HOSPITAL, L.P. By: GENERAL PARTNER: SAN ANGELO COMMUNITY MEDICAL CENTER, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President SAN ANGELO MEDICAL, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 33 SAN DIEGO HOSPITAL, L.P. By: GENERAL PARTNER: MISSION BAY MEMORIAL HOSPITAL, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President SAN LEANDRO HOSPITAL, L.P. By: GENERAL PARTNER: SAN LEANDRO MEDICAL CENTER, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President SAN LEANDRO MEDICAL CENTER, LLC By: SAN LEANDRO, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 34 SAN LEANDRO, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President SDH, LLC By: SILSBEE TEXAS, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President SDH LP, LLC By: TRIAD HOLDINGS III, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President SEBASTOPOL, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 35 SHERMAN HOSPITAL, L.P. By: GENERAL PARTNER: MEDICAL CENTER OF SHERMAN, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President SHERMAN MEDICAL CENTER, LLC By: TRIAD-MEDICAL CENTER OF SHERMAN SUBSIDIARY, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President SILSBEE DOCTORS HOSPITAL, L.P. By: GENERAL PARTNER: SILSBEE MEDICAL CENTER, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President SILSBEE MEDICAL CENTER, LLC By: SILSBEE TEXAS, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 36 SILSBEE TEXAS, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President SLH, LLC By: SAN LEANDRO, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President SOUTH ALABAMA MANAGED CARE CONTRACTING, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President SOUTH ALABAMA MEDICAL MANAGEMENT SERVICES, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 37 SOUTH ALABAMA PHYSICIANS SERVICE, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President SOUTH ARKANSAS CLINIC, LLC By: TRIAD HOLDINGS II, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President SOUTHERN TEXAS MEDICAL CENTER, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President SPROCKET MEDICAL MANAGEMENT, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 38 SURGICAL CENTER OF AMARILLO, LLC TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President SURGICAL CENTER OF SOUTHEAST TEXAS, LTD. By: GENERAL PARTNER: SURGICARE OF SOUTHEAST TEXAS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President SURGICARE OF AMARILLO, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President SURGICARE OF INDEPENDENCE, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 39 SURGICARE OF NORTH ANAHEIM, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President SURGICARE OF SAN LEANDRO, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President SURGICARE OF SHERMAN, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President SURGICARE OF SOUTHEAST TEXAS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President SURGICARE OF VICTORIA, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 40 SURGICARE OF VICTORIA, LTD. By: GENERAL PARTNER: SURGICARE OF VICTORIA, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President SURGICARE OUTPATIENT CENTER OF LAKE CHARLES, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President SURGICENTER OF JOHNSON COUNTY, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President SURGICENTER OF JOHNSON COUNTY, LTD. By: GENERAL PARTNER: SURGICARE OF JOHNSON COUNTY, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 41 SURGICENTERS OF AMERICA, L.P. By: GENERAL PARTNER: SAMARITAN SURGICENTERS OF ARIZONA, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President SURGICENTERS OF AMERICA, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President TERRELL HOSPITAL, L.P. By: GENERAL PARTNER: TERRELL MEDICAL CENTER, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 42 TERRELL MEDICAL CENTER, LLC By: TRIAD-MEDICAL CENTER AT TERRELL SUBSIDIARY, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President TRIAD - ARIZONA I, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President TRIAD - EL DORADO, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President TRIAD - SOUTH TULSA HOSPITAL COMPANY, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 43 TRIAD CSGP, LLC By: TRIAD HOLDINGS II, LLC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President TRIAD CSLP, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President TRIAD CORPORATE SERVICES, LIMITED PARTNERSHIP By: GENERAL PARTNER: TRIAD CSGP, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 44 TRIAD HEALTHCARE SYSTEM OF PHOENIX, L.P. By: GENERAL PARTNER: TRIAD OF PHOENIX, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President TRIAD HOLDINGS II, LLC By: TRIAD HOLDINGS II, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President TRIAD HOLDINGS III, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President TRIAD OF ARIZONA (L.P.), INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 45 TRIAD OF PHOENIX, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President TRIAD RC, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President TRIAD TEXAS, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President TRIAD-MEDICAL CENTER AT TERRELL SUBSIDIARY, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 46 TRIAD-MEDICAL CENTER OF SHERMAN SUBSIDIARY, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President TRIAD-NAVARRO REGIONAL HOSPITAL SUBSIDIARY, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President TROSCO, LLC By: TRIAD HOLDINGS II, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President TRUFOR PHARMACY, LLC By: TRIAD HOLDINGS II, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 47 VFARC, LLC By: TRIAD HOLDINGS III, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President VHC HOLDINGS, LLC By: TRIAD HOLDINGS III, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President VHC MEDICAL, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President VICTORIA HOSPITAL, LLC By: VHC MEDICAL, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 48 VICTORIA MEDICAL FOUNDATION By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President VICTORIA OF TEXAS, L.P. By: GENERAL PARTNER: DETAR HOSPITAL, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President VMF MEDICAL, LLC By: TRIAD HOLDINGS III, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President WAGONER COMMUNITY HOSPITAL, LLC By: TRIAD HOLDINGS II, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 49 WAMC, LLC By: WEST ANAHEIM, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President WEST ANAHEIM HOSPITAL, L.P. By: GENERAL PARTNER: WEST ANAHEIM MEDICAL CENTER, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President WEST ANAHEIM MEDICAL CENTER, LLC By: WEST ANAHEIM, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President WEST ANAHEIM, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 50 WESTMED By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President WHARTON MEDCO, LLC By: TRIAD HOSPITALS HOLDINGS, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President WHMC, LLC By: TRIAD HOLDINGS III, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President WILLAMETTE VALLEY CLINICS, LLC By: OREGON HEALTHCORP, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 51 WILLAMETTE VALLEY MEDICAL CENTER, LLC By: OREGON HEALTHCORP, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President WM MEDICAL, LLC By: TRIAD HOLDINGS III, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President WOMEN & CHILDREN'S HOSPITAL, LLC By: TRIAD HOLDINGS II, LLC By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President WOODLAND HEIGHTS MEDICAL CENTER, LLC By: TRIAD HOLDINGS III, INC. By: /s/ Morton A. Pierce Name: Morton A. Pierce Title: Vice President 52