Colonoscopy clinicians in Maryland
CMS lists 414 clinicians with a primary specialty of Gastroenterology, Internal Medicine, Family Practice, or General Practice who have billed Medicare for at least one colonoscopy and practice in Maryland, across 69 cities (details below).
Cities
# of clinicians performing colonoscopies
- Abingdon 5
- Annapolis 34
- Baltimore 121
- Bel Air 3
- Berlin 11
- Bethesda 18
- Bladensburg 1
- Bowie 11
- Brandywine 3
- Cambridge 1
- Catonsville 10
- Centreville 6
- Charlotte Hall 1
- Chester 1
- Cheverly 1
- Chevy Chase 8
- Clinton 6
- Columbia 46
- Cumberland 14
- Dunkirk 2
- Easton 7
- Elkton 2
- Ellicott City 1
- Forest Hill 3
- Fort Washington 4
- Frederick 27
- Gaithersburg 4
- Germantown 10
- Glen Burnie 20
- Glenn Dale 1
- Greenbelt 8
- Hagerstown 12
- Halethorpe 15
- Hancock 1
- Havre de Grace 1
- Hollywood 10
- Ijamsville 4
- La Plata 4
- Lanham 10
- Largo 29
- Laurel 12
- Leonardtown 13
- Lutherville 19
- Lutherville Timonium 1
- Middle River 20
- Mount Airy 4
- Nottingham 1
- Odenton 1
- Olney 27
- Oxon Hill 6
- Pasadena 1
- Pikesville 18
- Prince Frederick 6
- Rockville 67
- Rosedale 1
- Salisbury 12
- Silver Spring 4
- Snow Hill 3
- Solomons 2
- Stevensville 10
- Takoma Park 1
- Temple Hills 1
- Timonium 11
- Towson 9
- Upper Marlboro 7
- Waldorf 8
- Westminster 2
- Wheaton 1
- Williamsport 2
A clinician who practices in more than one city is counted in each city.
Understanding CMS Data
CMS's "Colonoscopy" category combines specific billing codes for colonoscopy to calculate the number of times each clinician billed Medicare for a "Colonoscopy." These include screening colonoscopy, diagnostic colonoscopy, and colonoscopy with biopsy or polyp removal. CMS's list also includes flexible sigmoidoscopy and laparoscopic appendectomy, so a clinician's count may include those procedures. CMS counts one procedure per patient per day, so a colonoscopy that included both a biopsy and a polyp removal counts once. CMS reports only procedures that clinicians billed to Original Medicare and Medicare Advantage. Therefore, CMS's procedure volume data does not include procedures that clinicians may have performed on patients who have other health care coverage (e.g., commercial insurance, self-pay, or the VA). Billing variation and coding errors can also affect CMS's data. Therefore, the number of procedures that CMS reports for a clinician may be higher or lower than the actual number of colonoscopies a clinician performed during the reporting period. Lastly, only clinicians with a primary specialty of Gastroenterology, Internal Medicine, Family Practice, or General Practice (as reported to Medicare) are presented.
Source: Centers for Medicare & Medicaid Services (October 2, 2026 release).