| THE MARYLAND CENTER FOR DIGESTIVE HEALTH LLC | ANNAPOLIS | 9429 | No Different Than the National Rate |
| ENDOCENTRE OF BALTIMORE | BALTIMORE | 4446 | No Different Than the National Rate |
| HARFORD ENDOSCOPY CENTER | BEL AIR | 4438 | No Different Than the National Rate |
| FREDERICK ENDOSCOPY CENTER LLC | FREDERICK | 3987 | No Different Than the National Rate |
| MEDSTAR MEDICAL GROUP SOUTHERN MARYLAND LLC | HOLLYWOOD | 3849 | No Different Than the National Rate |
| ENDOSCOPY CENTER OF NORTH BALTIMORE | TOWNSON | 3761 | No Different Than the National Rate |
| HOWARD COUNTY GASTROINTESTINAL DIAGNOSTIC CTR LLC | COLUMBIA | 3567 | No Different Than the National Rate |
| CHEVY CHASE ENDOSCOPY CENTER | CHEVY CHASE | 3470 | Better Than the National Rate |
| BETHESDA ENDOSCOPY CENTER LLC | BETHESDA | 3329 | No Different Than the National Rate |
| ENDOSCOPIC SURGICAL CENTER OF MARYLAND NORTH | ROCKVILLE | 3301 | No Different Than the National Rate |
| EASTERN SHORE ENDOSCOPY LLC | EASTON | 3265 | No Different Than the National Rate |
| ENDOSCOPIC SURGICAL CENTRE OF MARYLAND | SILVER SPRING | 3131 | No Different Than the National Rate |
| AMBULATORY ENDOSCOPY CENTER OF MARYLAND | LAUREL | 3083 | No Different Than the National Rate |
| FALLSGROVE ENDOSCOPY CENTER LLC | ROCKVILLE | 2889 | No Different Than the National Rate |
| GREENBELT ENDOSCOPY CENTER LLC | LANHAM | 2809 | No Different Than the National Rate |
| MARYLAND ENDOSCOPY CENTER LLC | TOWSON | 2787 | No Different Than the National Rate |
| ADVANCED SURGERY CENTER LLC | ROCKVILLE | 2674 | No Different Than the National Rate |
| GASTROINTESTINAL DIAGNOSTIC CENTER | CATONVILLE | 2664 | No Different Than the National Rate |
| ENDOSCOPY CENTER AT ROBINWOOD LLC | HAGERSTOWN | 2462 | No Different Than the National Rate |
| ENDOCENTRE AT QUARTERFIELD STATION | GLEN BURNIE | 2347 | No Different Than the National Rate |
| MARYLAND DIAGNOSTIC AND THERAPEUTIC ENDO CENTER LLC | ANNAPOLIS | 2069 | No Different Than the National Rate |
| WALDORF ENDOSCOPY CENTER | WALDORF | 1974 | No Different Than the National Rate |
| CAPITAL ENDOSCOPY LLC | HYATTSVILLE | 1954 | No Different Than the National Rate |
| GASTROINTESTINAL ENDOSCOPY ASSOCIATES LLC | ROCKVILLE | 1763 | No Different Than the National Rate |
| ANNE ARUNDEL DIGESTIVE CENTER | PASADENA | 1545 | No Different Than the National Rate |