| 9106 PHILADELPHIA ROAD AMBULATORY SURGERY CENTER LLC | Organization | BALTIMORE |
| AAU GREENBELT ASC LLC | Organization | GREENBELT |
| ABINGDON SURGICAL CENTER PC | Organization | ABINGDON |
| ADVANCE SURGERY CENTER | Organization | ANNAPOLIS |
| ADVANCED AMBULATORY SURGERY CENTER LLC | Organization | CHEVY CHASE |
| ADVANCED CENTERS FOR ORTHOPEDIC SURGERY AND SPORTS MEDICINE | Organization | WESTMINSTER |
| ADVANCED CENTERS FOR ORTHOPEDIC SURGERY AND SPORTS MEDICINE | Organization | OWINGS MILLS |
| ADVANCED EYE LASER AND SURGERY CENTER | Organization | SPARKS |
| ADVANCED PAIN MANAGEMENT SERVICES, LLC | Organization | GERMANTOWN |
| ADVANCED PAIN MANAGEMENT, LLC | Organization | WALDORF |
| ADVANCED PAIN MANAGEMENT,LLC | Organization | FREDERICK |
| ADVANCED PAIN SURGERY CENTER LLC | Organization | WALDORF |
| ADVANCED SURGERY CENTER OF BETHESDA, LLC | Organization | BETHESDA |
| ADVANCED SURGICAL CARE OF MARYLAND, LLC | Organization | LANHAM |
| ADVANTIA SURGICAL LLC | Organization | BELTSVILLE |
| ADVENTIST HEALTHCARE SC AT NATIONAL HARBOR, LLC | Organization | OXON HILL |
| AESTHETIC FACIAL SURGERY CENTER OF ROCKVILLE | Organization | ROCKVILLE |
| ALLEGANY AMBULATORY SURGERY CENTER LLC | Organization | CUMBERLAND |
| ALLEGHENY CENTER FOR AMBULATORY SERVICES | Organization | HAGERSTOWN |
| AMBER MEADOW SURGICAL CENTER, LLC | Organization | FREDERICK |
| AMBULATORY CENTER FOR AESTHETIC AND RECONSTRUCTIVE SURGERY | Organization | FREDERICK |
| AMBULATORY FOOT AND ANKLE CENTER, INC. | Organization | SILVER SPRING |
| AMBULATORY GENERAL SURGERY CENTER | Organization | ROCKVILLE |
| AMBULATORY PLASTIC SURGERY CENTER ASSOCIATES, CHARTERED | Organization | ROCKVILLE |
| AMBULATORY SURGERY CENTER FOR PELVIC NEURO SCIENCE LLC | Organization | LUTHERVILLE |
| AMBULATORY SURGERY CENTER OF BETHESDA, LLC | Organization | NORTH BETHESDA |
| AMERICAN ACCESS CARE OF BALTIMORE ASC LLC | Organization | BALTIMORE |
| AMERICAN ACCESS CARE OF TOWSON ASC LLC | Organization | OWINGS MILLS |
| ANDOCHICK SURGICAL CENTER LLC | Organization | FREDERICK |
| ANNAPOLIS ENDOSCOPY CENTER LLC | Organization | ANNAPOLIS |
| ANNAPOLIS ENT SURGICAL CENTER, LLC | Organization | ANNAPOLIS |
| ANNAPOLIS SURGERY CENTER, L.L.C. | Organization | ANNAPOLIS |
| ANNAPOLIS SURGERY PAVILION, LLC. | Organization | ANNAPOLIS |
| ANNE ARUNDEL UROLOGICAL SURGERY CENTER LLC | Organization | ANNAPOLIS |
| ANNE ARUNDEL-SCA SURGICENTER, LLC | Organization | ANNAPOLIS |
| ANNE ARUNDEL-SCA SURGICENTER, LLC | Organization | PASADENA |
| ANTIETAM UROSURGICAL CENTER LLC ASC | Organization | HAGERSTOWN |
| ARTURO BETANCOURT, M.D., P.A. | Organization | GLEN BURNIE |
| ARUNDEL AMBULATORY SURGERY CENTER, INC. | Organization | ANNAPOLIS |
| ARUNDEL FOOT & ANKLE SURGERY CENTER, LLC | Organization | GLEN BURNIE |
| ARUNDEL MILLS SURGERY CENTER, INC. | Organization | HANOVER |
| ASC DEVELOPMENT COMPANY LLC | Organization | BERWYN HEIGHTS |
| ASC DEVELOPMENT COMPANY LLC | Organization | WHITE PLAINS |
| ASC DEVELOPMENT COMPANY, LLC | Organization | GLEN BURNIE |
| ASC DEVELOPMENT COMPANY, LLC | Organization | PIKESVILLE |
| ASC DEVELOPMENT COMPANY, LLC | Organization | CUMBERLAND |
| ASC DEVELOPMENT COMPANY, LLC | Organization | FREDERICK |
| ASC DEVELOPMENT COMPANY, LLC | Organization | ROCKVILLE |
| ASC DEVELOPMENT COMPANY, LLC | Organization | SILVER SPRING |
| ASC DEVELOPMENT COMPANY, LLC | Organization | WALDORF |
| ASC DEVELOPMENT COMPANY, LLC | Organization | BOWIE |
| ASC DEVELOPMENT COMPANY, LLC | Organization | BALTIMORE |
| ASC DEVELOPMENT COMPANY, LLC | Organization | COLUMBIA |
| ASC DEVELOPMENT COMPANY, LLC | Organization | GERMANTOWN |
| ASC DEVELOPMENT COMPANY, LLC | Organization | HAGERSTOWN |
| ASC DEVELOPMENT COMPANY, LLC | Organization | BEL AIR |
| ASC MANAGEMENT, LLC | Organization | COLUMBIA |
| ASC RENEW MARYLAND SCIENCE AND TECH CENTER | Organization | BOWIE |
| AXIS SURGERY CENTER LLC | Organization | OXON HILL |
| AZAR EYE SURGERY CENTER LLC | Organization | SALISBURY |