**Exhibit 21.1**   NAME STATE OF INCORPORATION25 East Same Day Surgery, L.L.C. ILAdventist Midwest Health/USP Surgery Centers, L.L.C. ILAlamo Heights Surgicare, L.P. TXAlexandria Surgery Center Real Estate, LLC LAALMH Surgical Center East, LLC ILAmerican Endoscopy Services, Inc. TNArlington Surgicare Partners, Ltd. TXAspen Healthcare Holdings, Ltd. UKAspen Healthcare, Ltd. UKAspen Leasing, Ltd. UKAustintown Surgery Center, LLC OHBaptist Plaza Surgicare, L.P. TNBaptist Surgery Center, L.P. TNBagley Holdings, LLC OHBeaumont Surgical Affiliates, Ltd. TXBellaire Outpatient Surgery Center, L.L.P. TXBon Secours Surgery Center at Harbour View, LLC VABon Secours Surgery Center at Virginia Beach, LLC VABriarcliff Ambulatory Surgery Center, L.P. MOCape Surgery Center, L.P. FLCedar Park Surgery Center, L.L.P. TXCentral Avenue Surgery Center, LLC TNCentral Jersey Surgery Center, LLC GACentral Virginia Surgi-Center, L.P. VACHC/USP Surgery Centers, LLC FLChesterfield Ambulatory Surgery Center, L.P. MOChico Surgery Center, LP CAChristus Cabrini Surgery Center, L.L.C. LAChristus Santa Rosa Surgery Center, L.L.P. TXChristus/USP General Partner, LLC TXChristus/USP Surgery Centers, L.P. TXCHW/SCD/USP Tracy Surgery Centers, LLC CACHW/USP Bakersfield Surgery Centers, LLC CACHW/USP Bakersfield GP, LLC CACHW/USP Glendale GP, LLC CACHW/USP Glendale Memorial Surgery Centers, L.L.C. CACHW/USP Folsom GP, LLC CACHW/USP Fontana Surgery Centers, LLC CACHW/USP Las Vegas Surgery Centers, LLC NVCHW/USP Oxnard GP, LLC CACHW/USP Oxnard Surgery Centers, LLC CACHW/USP Phoenix II, LLC AZCHW/USP Roseville GP, LLC CACHW/USP Sacramento Surgery Centers, L.L.C. CACHW/USP San Gabriel GP, L.L.C. CACHW/USP San Gabriel Surgery Centers, L.L.C. CACHW/USP Surgery Centers, LLC AZClarkston ASC Partners, LLC MICoast Surgery Center, L.P. CACorpus Christi Holdings, LLC NVCorpus Christi Surgicare, Ltd. TXCorral Hollow Surgery Center, LLC CACourt Street Surgery Center, L.P. CACreekwood Surgery Center, L.P. MODallas Surgical Partners, L.L.P. TXDay-Op Surgery Consulting Company, LLC DEDecatur Surgery Center, L.P. DEDenton Surgicare Partners, Ltd. TXDenton Surgicare Real Estate, Ltd. TXDesert Ridge Outpatient Surgery, LLC AZDesoto Surgicare Partners, Ltd. TXDestin Surgery Center, Ltd. FLDoctors Outpatient Surgicenter, Ltd. TXDoctors Surgery Center of Kingman, L.L.C. AZEast Brunswick Surgery Center, LLC NJEast West Surgery Center, L.P. GAEastgate Building Center, L.L.C. OHEinstein/USP General Partner, LLC PAEinstein/USP Surgery Centers, LP PAElmwood Park Same Day Surgery, L.L.C. ILENH/USP Surgery Centers I, L.L.C. ILENH/USP Surgery Centers II, L.L.C. ILFolsom Outpatient Surgery Center, L.P. CAFort Worth Osteopathic Surgery Center, L.P. TXFort Worth Osteopathic Surgery Center GP, L.L.C. TXFort Worth Surgicare Partners, Ltd. TXFrisco Medical Center, L.L.P. TX
 

 
   NAME STATE OF INCORPORATIONFrontenac Ambulatory Surgery & Spine Care Center, L.P. MOGarland Surgicare Partners, Ltd. TXGeorgia Musculoskeletal Network, Inc. GAGenesis ASC Partners, LLC MIGlendale Memorial Ambulatory Surgery Center, L.P. CAGlobal Healthcare Partners, Ltd. UKGP Surgery Center, LLC DEGrapevine Surgicare Partners, Ltd. TXGreater Baton Rouge Surgical Hospital, LLC LAHealth Horizons of Kansas City, Inc. TNHealth Horizons of Murfreesboro, Inc. TNHealth Horizons of Nashville, Inc. TNHighgate Private Clinic, Ltd. UKHinsdale Surgical Center, LLC ILHuguley Surgery Center, LLP TXINTEGRIS/USP Surgery Centers, LLC OKINTEGRIS/USP Surgery Centers II, L.L.C. OKIdaho Surgery Center, LLC IDIrving-Coppell Surgical Hospital, L.L.P. TXISS-Orlando, LLC FLKSF Orthopaedic Surgery Center, L.L.P. TXLake Lansing ASC Partners, LLC MILansing ASC Partners, LLC MILapeer ASC Partners, LLC MILas Cruces Surgical Center LLC NMLawrenceville Surgery Center, L.L.C. GALewisville Surgicare Partners, Ltd. TXLiberty Ambulatory Surgery Center, L.P. MOMadison Ambulatory Surgery Center, LLC MSManchester Ambulatory Surgery Center, LP MOManitowoc Surgery Center, LLC DEMary Immaculate Ambulatory Surgery Center, LLC VAMason Ridge Ambulatory Surgery Center, L.P. MOMcLaren ASC of Flint, LLC MIMcLaren Real Estate Partners, Limited Partnership MIMCSH Real Estate Investors, Ltd. TXMedcenter Management Services, Inc. DEMemorial Ambulatory Surgery Center, LLC VAMemorial Hermann Surgery Center Cy-Fair, LLP TXMemorial Hermann Surgery Center Katy, LLP TXMemorial Hermann Surgery Center Northwest LLP TXMemorial Hermann Surgery Center Southwest, L.L.P. TXMemorial Hermann Surgery Center Texas Medical Center, LLP TXMemorial Hermann Surgery Center Sugar Land, L.L.P. TXMemorial Hermann Surgery Center — The Woodlands, LLP TXMemorial Hermann/USP Surgery Centers, LLP TXMemorial Hermann/USP Surgery Centers II, LP TXMemorial Hermann/USP Surgery Centers III, LLP TXMemorial Hermann/USP Surgery Centers IV, LLP TXMercy/USP General Partners, L.L.C. PAMercy/USP Surgery Centers, L.P. PAMetro Surgery Center, L.P. DEMetroplex Surgicare Partners, Ltd. TXMichigan ASC Partners, L.L.C. MIMid Rivers Ambulatory Surgery Center, L.P. MOMiddle Tennessee Ambulatory Surgery Center, L.P. DEMountain Empire Surgery Center, L.P. GAMSH Partners, LLP TXNew Horizons Surgery Center, LLC OHNew Mexico Orthopaedic Surgery Center Limited Partnership GANorth MacArthur Surgery Center, LLC OKNorth Central Surgical Center, L.L.P. TXNorth Fontana Surgery Center, LLC CANorth Garland Surgery Center, L.L.P. TXNorth Shore Same Day Surgery, L.L.C. ILNKCH/USP Briarcliff GP, LLC MONKCH/USP Liberty GP, LLC MONortheast Ohio Surgery Center, LLC OHNorthern Monmouth Regional Surgery Center, L.L.C. NJNorthridge Surgery Center, L.P. TNNorthside-Cherokee/USP Surgery Centers, L.L.C. GANorthwest Georgia Orthopaedic Surgery Center, LLC GANorthwest Surgery Center, Ltd. TXNorthwest Surgery Center, LLP TXOklahoma Center for Orthopedic and Multi-Specialty Surgery, LLC OKOlive Ambulatory Surgery Center, L.P. MOOpthalmology Anesthesia Services, LLC FLOrlando Opthalmology Surgery Center, LLC FL
 

 
   NAME STATE OF INCORPORATIONOrtho Excel, Inc. DEOrthoLink ASC Corporation TNOrthoLink Baptist ASC, LLC TNOrthoLink Physicians Corporation DEOrthoLink Radiology Services Corporation TNOrthoLink/ Georgia ASC, Inc. GAOrthoLInk/New Mexico ASC, Inc. GAOrthoLink/TN ASC, Inc. TNOrthoLInk/TOC, LLC TNOrthopedic and Surgical Specialty Company, LLC AZOrthopedic South Surgical Partners, LLC GAPacific Endo-Surgical Center, L.P. CAPark Cities Surgery Center, L.P. TXPark Cities/Trophy Club GP, LLC TXParkway Surgery Center, LLC NVParkwest Surgery Center, L.P. TNPasadena Holdings, LLC NVPhysicians Data Professionals, Inc. TXPhysicians Pavilion, L.P. DEPhysicians Surgery Center of Tempe, LLC OKProvidence/USP Santa Clarita GP, LLC CAProvidence/USP Surgery Centers, L.L.C. CARadsource, LLC DEReading Ambulatory Surgery Center, L.P. PARedmond Surgery Center, LLC TNResurgens Surgery Center, LLC GARichmond ASC Leasing Company, LLC VARiver North Same Day Surgery, L.L.C. ILRockwall/Heath Surgery Center, L.L.P. TXRoseville Surgery Center, L.P. CARoswell Surgery Center, L.L.C. GASaint Thomas Campus Surgicare, L.P. TNSaint Thomas/USP — Baptist Plaza, L.L.C. TNSaint Thomas/USP Surgery Centers, L.L.C. TNSaint Thomas/USP Surgery Centers II, LLC TNSame Day Surgery, LLC ILSame Day Management, L.L.C. ILSan Antonio Endoscopy, L.P. TXSan Fernando Valley Surgery Center, L.P. CASan Gabriel Ambulatory Surgery Center, L.P. CASan Gabriel Valley Surgical Center, L.P. CASan Martin Surgery Center, LLC NVSand Lake Surgery Center, L.P. DESanta Clarita Surgery Center, L.P. CASarasota Surgicare, Ltd. FLScripps Encinitas Surgery Center, LLC CAScripps/USP Surgery Centers, L.L.C. CAShrewsbury Surgery Center, LLC NJShore Outpatient Surgicenter, L.L.C. GAShoreline Real Estate Partnership, LLP TXShoreline Surgery Center, LLP TXSmartHealth Norwin Hills Outpatient Center, L.P. PASouthwest Ambulatory Surgery Center, L.L.C. OKSpecialists Surgery Center, L.L.C. OKSpecialty Lithotripsy Services, LLC GASpecialty Surgicenters, Inc. GASSI Holdings, Inc. GASt. Agnes Surgery Center of Ellicott City, L.L.L.P. MDSt. Agnes/USP Joint Venture, LLC MDSt. John’s Outpatient Surgery Center, LP CASt. Joseph’s Outpatient Surgery Center, LLC AZSt. Mary’s Surgical Center, LLC MOSt. Mary’s/USP Surgery Centers, LLC MOSt. Vincent Health/USP, LLC INSugar Land Surgical Hospital, LLP TXSummit Radiology, LLC ILSunset Hills Ambulatory Surgery Center, L.P. MOSuburban Endoscopy Services, LLC TNSurgery Center of Canfield, LLC OHSurgery Center of Columbia, L.P. MOSurgery Center of Georgia, LLC GASurgery Center of Gilbert, LLC AZSurgery Center of Peoria, LLC AZSurgery Center of Scottsdale, LLC AZSurgery Centers Holdings Company, L.L.C. OKSurgery Centers of America II, LLC OKSurgicoe of Texas, Inc. TXSurgicoe Real Estate, L.L.C. GA
 

 
   NAME STATE OF INCORPORATIONSurginet, Inc. TNSurginet of Northwest Houston, Inc. TNSurgis, Inc. DESurgis Management Services, Inc. TNSurgis of Chico, Inc. CASurgis of Pearland, Inc. TNSurgis of Phoenix, Inc. TNSurgis of Redding, Inc. TNSurgis of Rivergate, Inc. TNSurgis of Sand Lake, Inc. TNSurgis of Sonama, Inc. TNSurgis of Victoria, Inc. TNSurgis of Willowbrook, Inc. TNTamarac Surgery Center LLC FLTempleton Surgery Center, LLC TNTerre Haute Surgical Center, LLC INTeton Outpatient Services, LLC WYTexan Ambulatory Surgery Center, L.P. TXTexas Health Venture Arlington L.P. TXTexas Health Venture Bellaire, L.P. TXTexas Health Venture Denton L.P. TXTexas Health Venture DSP L.P. TXTexas Health Venture Fort Worth, L.L.C. TXTexas Health Venture Frisco, L.P. TXTexas Health Venture Garland, L.P. TXTexas Health Venture Grapevine L.P. TXTexas Health Venture Huguley, L.P. TXTexas Health Venture Irving-Coppell, L.P. TXTexas Health Venture North Garland, L.P. TXTexas Health Venture Park Cities, L.P. TXTexas Health Venture Park Cities/Trophy Club, LP TXTexas Health Venture Rockwall, L.P. TXTexas Health Venture Rockwall 2, L.P. TXTexas Health Ventures Group L.L.C. TXTexas Health Ventures Group Holdings, LLC NVThe Center for Ambulatory Surgical Treatment, L.P. CAThe Surgery Center, an Ohio limited partnership OHTHVG Arlington GP, LLC DETHVG Bedford GP, LLC DETHVG Bedford, L.P. TXTHVG Bellaire GP, LLC TXTHVG Denton GP, LLC DETHVG DeSoto GP, LLC DETHVG DeSoto, L.P. TXTHVG DSP GP, LLC DETHVG Fort Worth GP, LLC DETHVG Fort Worth, L.P. TXTHVG Frisco GP, LLC DETHVG Garland GP, LLC DETHVG Grapevine GP, LLC DETHVG Huguley GP, LLC DETHVG Irving-Coppell GP, LLC DETHVG Lewisville GP, LLC DETHVG Lewisville, L.P. TXTHVG North Garland GP, LLC DETHVG Park Cities GP, LLC TXTHVG Park Cities/Trophy Club GP, LLC TXTHVG Rockwall GP, LLC DETHVG Rockwall 2 GP, LLC TXTHVG Valley View GP, LLC DETHVG Valley View L.P. TXTHVG/HeatlhFirst, LLC TXTHVG/HealthFirst Holdings, LLC NVToms River Surgery Center, L.L.C. NJTOPS Specialty Hospital, Ltd. TXTrophy Club Medical Center, L.P. TXTulsa Outpatient Surgery Center, LLC OKUnited Surgery Center — Southeast, Ltd. TXUnited Surgical Associates, L.L.C. AZUniversity Surgical Partners of Dallas, L.L.P. TXUnited Surgical of Atlanta, Inc. GAUnited Surgical of Tracy, Inc. CAUnited Surgical Partners Holdings, Inc. DEUniversity Surgery Center, Ltd. FLUSP Alexandria, Inc. LAUSP Assurance Company VTUSP Austin, Inc. TXUSP Austintown, Inc. OH
 

 
   NAME STATE OF INCORPORATIONUSP Baton Rouge, Inc. LAUSP Baltimore, Inc. MDUSP Bridgeton, Inc. MOUSP Cedar Park, Inc. TXUSP Central New Jersey, Inc. NJUSP Chesterfield, Inc. MOUSP Chicago, Inc. ILUSP Cleveland, Inc. OHUSP Coast, Inc. CAUSP Columbia, Inc. MOUSP Corpus Christi, Inc. TXUSP Cottonwood, Inc. AZUSP Creve Coeur, Inc. MOUSP Decatur, Inc. TNUSP Des Peres, Inc. MOUSP Destin, Inc. FLUSP Domestic Holdings, Inc. DEUSP Florissant, Inc. MOUSP Fredericksburg, Inc. VAUSP Frontenac, Inc. MOUSP Glendale, Inc. CAUSP Harbour View, Inc. VAUSP Houston, Inc. TXUSP Indiana, Inc. INUSP International Holdings, Inc. DEUSP Kansas City, Inc. MOUSP Las Cruses, Inc. NMUSP Long Island, Inc. DEUSP Lyndhurst, Inc. OHUSP Mason Ridge, Inc. MOUSP Michigan, Inc. MIUSP Midwest, Inc. ILUSP Mission Hills, Inc. CAUSP Nevada, Inc. NVUSP Nevada Holdings, LLC NVUSP Newport News, Inc. VAUSP New Jersey, Inc. NJUSP North Kansas City, Inc. MOUSP North Texas, Inc. DEUSP Oklahoma, Inc. OKUSP Olive, Inc. MOUSP Oxnard, Inc. CAUSP Philadelphia, Inc. PAUSP Phoenix, Inc. AZUSP Pittsburgh, Inc. PAUSP Reading, Inc. PAUSP Richmond, Inc. VAUSP Richmond II, Inc. VAUSP Sacramento, Inc. CAUSP San Antonio, Inc. TXUSP San Gabriel, Inc. CAUSP Sarasota, Inc. FLUSP Securities Corporation TNUSP St. Peters, Inc. MOUSP Sunset Hills, Inc. MOUSP Tennessee, Inc. TNUSP Texas, L.P. TXUSP Texas Air, L.L.C. TXUSP Torrance, Inc. CAUSP Virginia Beach, Inc. VAUSP Webster Groves, Inc. MOUSP West Covina, Inc. CAUSP Westwood, Inc. CAUSP Winter Park, Inc. FLUSPE Holdings Limited UKUSPI San Diego, Inc. CAUtica ASC Partners, LLC MIValley View Surgicare Partners, Ltd. TXVictoria Ambulatory Surgery Center, LP DEWarner Park Surgery Center, L.P. AZWebster Ambulatory Surgery Center, L.P. MOWillowbrook Ambulatory Surgery Center, L.P. TN
 

 
             **Name** **Juris.** **% Ownership** **Wholly-owned** 25 East Same Day Surgery, L.L.C. IL  74.01%    Alamo Heights Surgicare, L.P. TX  53.22%    Advanced Ambulatory Surgical Care, L.P. MO  33.00%           41.06%    Austintown Surgery Center, LLC OH  68.50%    Baptist Plaza Surgicare, L.P. TN  40.25%    Baptist Surgery Center, L.P. TN  21.77%    Bellaire Outpatient Surgery Center, L.L.P. TX  25.07%    Bon Secours Surgery Center at Virginia Beach, LLC VA  50.00%    Briarcliff Ambulatory Surgery Center, L.P. MO  28.80%    Cape Surgery Center, L.P. FL  45.31%    Cedar Park Surgery Center, L.L.P. TX  26.04%    Central Jersey Surgery Center, LLC GA  46.87%    Central Virginia Surgi-Center, L.P. VA  73.87%    Chesterfield Ambulatory Surgery Center, L.P. MO  33.00%    Christus Cabrini Surgery Center, L.L.C. LA  25.00%    Christus Santa Rosa Surgery Center, L.L.P. TX  20.88%    Clarkston ASC Partners, LLC MI  50.00%    Coast Surgery Center, L.P. CA  61.30%    Corpus Christi Surgicare, Ltd. TX  66.80%    Creekwood Surgery Center, L.P. MO  62.00%    Dallas Surgical Partners, L.L.P. TX  27.34%    Denton Surgicare Partners, Ltd. TX  26.78%    Denton Surgicare Real Estate, Ltd. TX  24.45%    Decatur Surgery Center, L.P. DE  64.00%    Desert Ridge Outpatient Surgery, LLC AZ  34.00%    Destin Surgery Center, Ltd. FL  30.61%    Desoto Surgicare Partners, Ltd. TX  43.79%    Doctors Outpatient Surgicenter, Ltd. TX  45.48%    East Brunswick Surgery Center, LLC NJ  44.25%    East West Surgery Center, L.P. GA  48.00%    Elmwood Park Same Day Surgery, L.L.C. IL  60.23%    Folsom Outpatient Surgery Center, L.P. CA  30.00%    Frisco Medical Center, L.L.P. TX  25.00%    Fort Worth Osteopathic Surgery Center, L.P. TX  9.26%    Fort Worth Surgicare Partners, Ltd. TX  42.74%    Garland Surgicare Partners, Ltd. TX  34.90%    Genesis ASC Partners, LLC MI  50.00%    Glendale Memorial Ambulatory Surgery Center, L.P. CA  50.00%    Grapevine Surgicare Partners, Ltd. TX  29.01%    Greater Baton Rouge Surgical Hospital, LLC LA  40.00%    Huguley Surgery Center, LLP TX  18.75%    Irving-Coppell Surgical Hospital, L.L.P. TX  7.24%    KSF Orthopaedic Surgery Center, L.L.P. TX  9.27%    Lake Lansing ASC Partners, LLC MI  50.00%    Lansing ASC Partners, LLC MI  50.00%    Lapeer ASC Partners, LLC MI  50.00%    Las Cruces Surgical Center LLC NM  49.60%    Lawrenceville Surgery Center, L.L.C. GA  15.00%    Lewisville Surgicare Partners, Ltd. TX  34.91%    Liberty Ambulatory Surgery Center, L.P. MO  30.34%    Mary Immaculate Ambulatory Surgery Center, LLC VA  20.25%    McLaren ASC of Flint, LLC MI  50.00%    MCSH Real Estate Investors, Ltd. TX  1.50%    Memorial Ambulatory Surgery Center, LLC VA  16.39%    
 

 
             **Name** **Juris.** **% Ownership** **Wholly-owned** Memorial Hermann Surgery Center Katy, LLP TX  9.00%    Memorial Hermann Surgery Center Northwest LLP TX  10.98%    Memorial Hermann Surgery Center Southwest, L.L.P. TX  9.32%    Memorial Hermann Surgery Center Texas MedicalCenter, LLP TX  4.95%    Memorial Hermann Surgery Center Sugar Land, L.L.P. TX  13.73%    Memorial Hermann Surgery Center — The Woodlands, LLP TX  9.90%    Mercy Southwest Ambulatory Surgery Center, L.P. CA  100.00%  ***** Metroplex Surgicare Partners, Ltd. TX  43.13%    Mid Rivers Ambulatory Surgery Center, L.P. MO  32.70%    Middle Tennessee Ambulatory Surgery Center, L.P. DE  37.50%    Mountain Empire Surgery Center, L.P. GA  20.00%    MSH Partners, LLP TX  27.34%    New Mexico Orthopaedic Surgery Center LimitedPartnership GA  51.00%    North MacArthur Surgery Center, LLC OK  48.96%    North Central Surgical Center, L.L.P. TX  14.05%    North Garland Surgery Center, L.L.P. TX  25.00%    North Shore Same Day Surgery, L.L.C. IL  72.44%    Northern Monmouth Regional Surgery Center, L.L.C. NJ  29.63%    Northwest Georgia Orthopaedic Surgery Center, LLC GA  15.00%    Oklahoma Center for Orthopedic and Multi-SpecialtySurgery, LLC OK  24.26%    Olive Ambulatory Surgery Center, L.P. MO  32.05%    Orthopedic and Surgical Specialty Company, LLC AZ  37.00%    Orthopedic South Surgical Partners, LLC GA  15.00%    Pacific Endo-Surgical Center, L.P. CA  60.35%    Park Cities Surgery Center, L.P. TX  41.25%    Parkway Surgery Center, LLC NV  45.15%    Parkwest Surgery Center, L.P. TN  22.13%    Physicians Pavilion, L.P. DE  50.18%    Plainfield Surgery Center, LLC IL  33.00%    Reading Ambulatory Surgery Center, L.P. PA  65.35%    Resurgens Surgery Center, LLC GA  48.00%    River North Same Day Surgery, L.L.C. IL  55.10%    Rockwall/Heath Surgery Center, L.L.P. TX  29.69%    Roseville Surgery Center, L.P. CA  100.00%  ***** Roswell Surgery Center, L.L.C. GA  15.00%    Saint Thomas Campus Surgicare, L.P. TN  21.60%    Saint Thomas/USP Surgery Centers, L.L.C. TN  50.00%    San Antonio Endoscopy, L.P. TX  48.45%    San Fernando Valley Surgery Center, L.P. CA  34.00%    San Gabriel Ambulatory Surgery Center, L.P. CA  40.75%    San Gabriel Valley Surgical Center, L.P. CA  59.00%    San Martin Surgery Center, LLC NV  20.75%    Santa Clarita Surgery Center, L.P. CA  44.00%    Shore Outpatient Surgicenter, L.L.C. GA  56.25%    Shrewsbury Surgery Center, LLC NJ  28.20%    Six Corners Same Day Surgery, L.L.C. IL  50.00%    SmartHealth Norwin Hills Outpatient Center, L.P. PA  50.00%    Southwest Ambulatory Surgery Center, L.L.C. OK  24.26%    Specialists Surgery Center, L.L.C. OK  48.96%    St. Agnes Surgery Center of Ellicott City, L.L.L.P. MD  73.30%    St. John’s Outpatient Surgery Center, LP CA  34.75%    St. Joseph’s Outpatient Surgery Center, LLC AZ  40.45%    St. Mary’s Surgical Center, LLC MO  21.38%    Sugar Land Surgical Hospital, LLP TX  12.50%    Sunset Hills Ambulatory Surgery Center, L.P. MO  33.16%    
 

 
             **Name** **Juris.** **% Ownership** **Wholly-owned** Surgery Center of Georgia, LLC GA  30.50%    Tamarac Surgery Center LLC FL  60.81%    Terre Haute Surgical Center, LLC IN  50.00%    Teton Outpatient Services, LLC WY  51.56%    Texan Ambulatory Surgery Center, L.P. TX  60.00%    The Center for Ambulatory Surgical Treatment, L.P. CA  62.50%    The Surgery Center, an Ohio limited partnership OH  68.75%    Toms River Surgery Center, L.L.C. NJ  31.41%    TOPS Specialty Hospital, Ltd. TX  46.35%    Trophy Club Medical Center, L.P. TX  35.74%    Tulsa Outpatient Surgery Center, LLC OK  30.00%    United Surgery Center — Southeast, Ltd. TX  36.90%    University Surgery Center, Ltd. FL  40.00%    Valley View Surgicare Partners, Ltd. TX  33.48%    Warner Park Surgery Center, L.P. AZ  27.56%    Zeeba Surgery Center, L.P. OH  80.01%