|                                                         |        |                                                    |        |                                        |
|---------------------------------------------------------|--------|----------------------------------------------------|--------|----------------------------------------|
| Name                                                    |   | Assumed Name                                       |   | State of Incorporation or Organization |
| Ambulatory Resource Centres Investment Company, LLC     |   |                                               |   | Delaware                               |
| Ambulatory Resource Centres of Florida, Inc.       |   |                                               |   | Florida                                |
| Ambulatory Resource Centres of Massachusetts, Inc. |   |                                               |   | Tennessee                              |
| Ambulatory Resource Centres of Texas, Inc.         |   |                                               |   | Tennessee                              |
| Ambulatory Resource Centres of Washington, Inc.    |   |                                               |   | Tennessee                              |
| Ambulatory Resource Centres of Wilmington, Inc.    |   |                                               |   | Tennessee                              |
| Ambulatory Surgery Center of Cool Springs, LLC          |   |                                               |   | Tennessee                              |
| Animas Surgical Hospital, LLC                           |   |                                               |   | Delaware                               |
| ARC Development Corporation                             |   |                                               |   | Tennessee                              |
| ARC Financial Services Corporation                      |   |                                               |   | Tennessee                              |
| ARC Kentucky, LLC                                       |   | ARC Kentucky/Louisville, LLC (KY)                  |   | Tennessee                              |
| ARC of Bellingham, L.P.                                 |   |                                               |   | Tennessee                              |
| ARC of Georgia, LLC                                     |   | Premier Surgery Center (GA)                        |   | Tennessee                              |
| ARC Worcester Center, L.P.                              |   | ARC Worcester Center Limited Partnership (MA)      |   | Tennessee                              |
| ASC of Hammond, Inc                                     |   |                                               |   | Delaware                               |
| ASC of New Albany, LLC                                  |   |                                               |   | Indiana                                |
| Austin Surgical Holdings, LLC                           |   | ATX Surgical Holdings, LLC (TX)                    |   | Delaware                               |
| Bayside Endoscopy Center, LLC                           |   |                                               |   | Rhode Island                           |
| Birmingham Surgery Center, LLC                          |   |                                               |   | Delaware                               |
| Boulder Spine Center, LLC                               |   | Minimally Invasive Spine Institute (CO)            |   | Delaware                               |
| Bristol Spine Center, LLC                               |   | Renaissance Surgery Center (TN)                    |   | Delaware                               |
| Cape Coral Ambulatory Surgery Center, LLC               |   |                                               |   | Florida                                |
| CAPE CORAL ANESTHESIA SERVICES, LLC                     |   |                                               |   | Florida                                |
| Cardinal Sleep Centers of St. Charles, LLC              |   |                                               |   | Illinois                               |
| Central Austin Ambulatory Surgery Center, L.P.          |   | Central Park Surgery Center (TX)                   |   | Tennessee                              |
| Chesterfield Spine Center, LLC                          |   | St. Louis Spine and Orthopedic Surgery Center (MO) |   | Delaware                               |
| CMMP Surgical Center, L.L.C.                            |   |                                               |   | Missouri                               |
| CSS Services, LLC                                       |   |                                               |   | South Carolina                         |
| Cypress Surgery Center, LLC                             |   |                                               |   | Delaware                               |
| DSC Anesthesia, LLC                                     |   |                                               |   | Florida                                |
| Gresham Station Surgery Center, LLC                     |   |                                               |   | Oregon                                 |
| HMFW Surgery Center, L.P.                               |   |                                               |   | Texas                                  |
| Honolulu Spine Center, LLC                              |   |                                               |   | Delaware                               |

----

|                                                               |        |                                                                   |        |                                        |
|---------------------------------------------------------------|--------|-------------------------------------------------------------------|--------|----------------------------------------|
| Name                                                          |   | Assumed Name                                                      |   | State of Incorporation or Organization |
| Houston PSC - I, Inc.                                    |   |                                                              |   | Texas                                  |
| Jacksonville Beach Surgery Center, L.P.                       |   | Jacksonville Beach Surgery Center (FL)                            |   | Tennessee                              |
| Kent, LLC                                                     |   |                                                              |   | Rhode Island                           |
| Lakeside Women's Center of Oklahoma City, L.L.C.              |   |                                                              |   | Oklahoma                               |
| Largo Endoscopy Center, L.P.                                  |   | Tampa Bay Regional Surgery Center (FL)                            |   | Tennessee                              |
| Largo Surgery, LLC                                            |   | West Bay Surgery Center (FL)                                      |   | Florida                                |
| Lubbock Surgicenter, Inc.                                |   |                                                              |   | Texas                                  |
| Medisphere Health Partners - Oklahoma City, Inc.         |   |                                                              |   | Tennessee                              |
| Medisphere Health Partners Management of Tennessee, Inc. |   |                                                              |   | Tennessee                              |
| Mountian View Hospital, LLC                                   |   |                                                              |   | Idaho                                  |
| NeoSpine Puyallup Spine Center, LLC                           |   | Microsurgical Spine Center (WA)                                   |   | Delaware                               |
| NeoSpine Surgery of Bristol, LLC                              |   |                                                              |   | Delaware                               |
| NeoSpine Surgery of Nashville, LLC                            |   |                                                              |   | Delaware                               |
| NeoSpine Surgery of Puyallup, LLC                             |   |                                                              |   | Delaware                               |
| NeoSpine Surgery, LLC                                         |   |                                                              |   | Delaware                               |
| New Albany Outpatient Surgery, L.P.                           |   |                                                              |   | Delaware                               |
| Northeast Baptist Surgery Center, LLC                         |   | Village Specialty Surgical Center (TX)                            |   | Texas                                  |
| Northstar Hospital, LLC                                       |   |                                                              |   | Delaware                               |
| Northstar Surgical Center, L.P.                               |   |                                                              |   | Texas                                  |
| Novi Surgery Center, LLC                                      |   |                                                              |   | Michigan                               |
| NSC Edmond, Inc.                                         |   |                                                              |   | Oklahoma                               |
| Orange City Surgical, LLC                                     |   | Blue Springs Surgery Center (FL)                                  |   | Delaware                               |
| Orthopaedic Surgery Center of Asheville, L.P.                 |   | Orthopaedic Surgery Center of Asheville, Limited Partnership (NC) |   | Tennessee                              |
| Physicians Medical Center, L.L.C.                             |   | Physicians Surgical Specialty Hospital (DE)(Former Name)          |   | Louisiana                              |
| Physicians Surgery Center, LLC                                |   | Lee Island Coast Surgery Center (FL)                              |   | Delaware                               |
| Physicians Surgical Care Management, Inc.                |   |                                                              |   | Delaware                               |
| Physicians Surgical Care, Inc.                           |   |                                                              |   | Delaware                               |
| Pickaway Surgical Center, Ltd.                                |   | Physicians Ambulatory Surgery Center (OH)                         |   | Ohio                                   |
| PMCROS, L.L.C.                                                |   |                                                              |   | Louisiana                              |
| Portsmouth, LLC                                               |   |                                                              |   | Delaware                               |
| Premier Ambulatory Surgery of Duncanville, Inc.          |   |                                                              |   | Delaware                               |
| Premier Orthopaedic Surgery Center, LLC                       |   |                                                              |   | Tennessee                              |
| PSC Development Company, LLC                                  |   |                                                              |   | Delaware                               |
| PSC of New York, L.L.C.                                       |   |                                                              |   | Delaware                               |
| PSC Operating Company, LLC                                    |   |                                                              |   | Delaware                               |
| Quahog Holding Company, LLC                                   |   |                                                              |   | Delaware                               |
| Recovery Care, L.P.                                           |   |                                                              |   | Illinois                               |

----

|                                 |        |              |        |                                        |
|---------------------------------|--------|--------------|--------|----------------------------------------|
| Name                            |   | Assumed Name |   | State of Incorporation or Organization |
| SARC/Asheville, Inc.       |   |         |   | Tennessee                              |
| SARC/Circleville, Inc.     |   |         |   | Tennessee                              |
| SARC/Deland, Inc.          |   |         |   | Tennessee                              |
| SARC/Ft. Myers, Inc.       |   |         |   | Tennessee                              |
| SARC/FW, Inc.              |   |         |   | Tennessee                              |
| SARC/Georgia, Inc.         |   |         |   | Tennessee                              |
| SARC/Jacksonville, Inc.    |   |         |   | Tennessee                              |
| SARC/Kent, LLC                  |   |         |   | Tennessee                              |
| SARC/Knoxville, Inc.       |   |         |   | Tennessee                              |
| SARC/Largo Endoscopy, Inc. |   |         |   | Tennessee                              |
| SARC/Largo, Inc.           |   |         |   | Tennessee                              |
| SARC/Metairie, Inc              |   |         |   | Tennessee                              |
| SARC/Providence, LLC            |   |         |   | Tennessee                              |
| SARC/San Antonio, LLC           |   |         |   | Tennessee                              |
| SARC/Savannah, Inc.        |   |         |   | Tennessee                              |
| SARC/St. Charles, Inc.     |   |         |   | Tennessee                              |
| SARC/Vincennes, Inc.       |   |         |   | Tennessee                              |
| SARC/Worcester, Inc.       |   |         |   | Tennessee                              |
| SMBI Gresham, LLC               |   |         |   | Tennessee                              |
| SMBI Havertown, LLC             |   |         |   | Tennessee                              |
| SMBI Idaho, LLC                 |   |         |   | Tennessee                              |
| SMBI Northstar, LLC             |   |         |   | Tennessee                              |
| SMBI Portsmouth, LLC            |   |         |   | Tennessee                              |
| SMBIMS Birmingham, Inc.    |   |         |   | Tennessee                              |
| SMBIMS Durango, LLC             |   |         |   | Tennessee                              |
| SMBIMS Florida I, LLC           |   |         |   | Florida                                |
| SMBIMS Greenville, LLC          |   |         |   | Tennessee                              |
| SMBIMS Kirkwood, LLC            |   |         |   | Tennessee                              |
| SMBIMS Novi, LLC                |   |         |   | Tennessee                              |
| SMBIMS Orange City, LLC         |   |         |   | Tennessee                              |
| SMBIMS Steubenville, Inc.  |   |         |   | Tennessee                              |
| SMBIMS Tuscaloosa, Inc.    |   |         |   | Tennessee                              |
| SMBIMS Wichita, LLC             |   |         |   | Tennessee                              |
| SMBISS Beverly Hills, LLC       |   |         |   | Tennessee                              |
| SMBISS Chesterfield, LLC        |   |         |   | Tennessee                              |
| SMBISS Encino, LLC              |   |         |   | Tennessee                              |

----

|                                                  |        |                                                                                  |        |                                      |
|--------------------------------------------------|--------|----------------------------------------------------------------------------------|--------|--------------------------------------|
| Name                                             |   | Assumed Name                                                                     |   | State ofIncorporationor Organization |
| SMBISS Irvine, LLC                               |   |                                                                             |   | Tennessee                            |
| SMBISS Thousand Oaks, LLC                        |   |                                                                             |   | Tennessee                            |
| South Shore Operating Company, LLC               |   |                                                                             |   | Delaware                             |
| Specialty Surgical Center of Beverly Hills, L.P. |   |                                                                             |   | California                           |
| Specialty Surgical Center of Encino, L.P.        |   |                                                                             |   | California                           |
| Specialty Surgical Center of Encino, LLC         |   |                                                                             |   | California                           |
| Specialty Surgical Center of Irvine, L.P.        |   |                                                                             |   | California                           |
| Specialty Surgical Center of Irvine, LLC         |   |                                                                             |   | California                           |
| Specialty Surgical Center of Thousand Oaks, L.P. |   |                                                                             |   | California                           |
| Specialty Surgical Center of Thousand Oaks, LLC  |   |                                                                             |   | California                           |
| Specialty Surgical Center, LLC                   |   |                                                                             |   | California                           |
| Surgery Center of Pennsylvania, LLC              |   | Havertown                                                                        |   | Delaware                             |
| Surgery Center Partners, LLC                     |   | Timberlake Surgery Center (MO)                                                   |   | Delaware                             |
| Surgical Hospital of Austin, L.P.                |   | Austin Surgical Hospital (TX)                                                    |   | Texas                                |
| Surgicare of Deland, Inc.                   |   |                                                                             |   | Florida                              |
| Symbion Ambulatory Resource Centres, Inc.   |   |                                                                             |   | Tennessee                            |
| Symbion Employee Relief Disaster Fund            |   |                                                                             |   | Tennessee                            |
| SymbionARC Management Services, Inc.        |   |                                                                             |   | Tennessee                            |
| SymbionARC Support Services, LLC                 |   |                                                                             |   | Tennessee                            |
| Texarkana Surgery Center GP, Inc.           |   |                                                                             |   | Texas                                |
| Texarkana Surgery Center, L.P.                   |   |                                                                             |   | Delaware                             |
| The Center for Special Surgery, LLC              |   |                                                                             |   | Delaware                             |
| The Hand Surgery Center of Louisiana, L.P.       |   | Greater New Orleans Surgery Center and The Hand Surgery Center of Louisiana (LA) |   | Tennessee                            |
| The Surgery Center of Ocala, LLC                 |   |                                                                             |   | Tennessee                            |
| The Surgery Center, LLC                          |   |                                                                             |   | Georgia                              |
| UniPhy Healthcare of Johnson City VI, LLC        |   | UniPhy Healthcare of Johnson City VI, Inc.(Entity Conversion)               |   | Tennessee                            |
| UniPhy Healthcare of Louisville, Inc.       |   |                                                                             |   | Tennessee                            |
| UniPhy Healthcare of Maine I, Inc.          |   |                                                                             |   | Tennessee                            |
| UniPhy Healthcare of Memphis I, LLC              |   | UniPhy Healthcare of Memphis I, Inc.(Entity Conversion)                     |   | Tennessee                            |
| UniPhy Healthcare of Memphis II, Inc.       |   |                                                                             |   | Tennessee                            |
| UniPhy Healthcare of Memphis III, LLC            |   |                                                                             |   | Tennessee                            |
| UniPhy Healthcare of Memphis IV, LLC             |   |                                                                             |   | Tennessee                            |

----

|                                          |        |                        |        |                                        |
|------------------------------------------|--------|------------------------|--------|----------------------------------------|
| Name                                     |   | Assumed Name           |   | State of Incorporation or Organization |
| Valley Ambulatory Surgery Center, L.P.   |   |                   |   | Illinois                               |
| Valley Medical Inn, L.P.                 |   |                   |   | Illinois                               |
| Valley Surgical Center, Ltd.             |   | Valley Surgical Center |   | Ohio                                   |
| VASC, Inc.                          |   |                   |   | Illinois                               |
| Village Surgicenter, Inc.           |   |                   |   | Delaware                               |
| Village Surgicenter, Limited Partnership |   |                   |   | Delaware                               |
| Wilmington Surgery Center, L.P.          |   |                   |   | Tennessee                              |