Colonoscopy clinicians in Rockville, Maryland

CMS lists 67 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 Rockville, Maryland (details below).

Colonoscopy volume

Clinician	Colonoscopies billed	Percentile rank
Michael Schindler, MD	175	85%
Robert Finkel, MD	159	82%
Stephen Humm, MD	140	77%
Charles Obioha, MD	138	77%
Zaifi Shanavas, MD	135	76%
Jatinder Sekhon, MD	128	74%
Matthew Chandler, MD	126	73%
Kathryn Kirk, MD	122	72%
David Jager, MD	120	71%
Babak Sagvand, MD	112	69%
Matthew Yeatman, MD	112	69%
Ghanshyam Gupta, MD	109	67%
George Bolen, MD	106	66%
Ali Husain, MD	104	66%
Nelson Chuang, MD	102	65%
Nissrin Ezmerli, MD	102	65%
Lawrence Bassin, MD	101	65%
Maaz Sohail, MD	100	64%
Eric Pollack, MD	98	63%
Anna Strongin, MD	94	62%
Akriti Saxena, MD	93	61%
Olanma Okoji, MD	91	60%
Ruben Acosta, MD	89	59%
Natasha Kamal, MD	88	59%
Dawei Yang, MD	86	58%
Jessica Korman, MD	85	58%
James Butler, MD	84	57%
Byung Soo Yoo, MD	84	57%
Roderick Kreisberg, MD	83	57%
Stephen Park, MD	83	57%
Kevin Collier, MD	82	56%
Leigh Bornstein Lurie, MD	80	55%
Julio Salcedo, MD	80	55%
Joseph Genovese, MD	79	54%
Neil Julie, MD	78	54%
Andrew Mowery, DO	78	54%
Eiman Nabi, MD	77	53%
Eric Margulies, MD	76	53%
Jeffrey Kim, MD	74	52%
Jessica Rosenberg, MD	74	52%
Annmarie Stephenson Thomas, DO	71	50%
Shien Hu, MD	70	50%
Soonbok Woo, MD	70	50%
Weiming Yan, MD	70	50%
Zachary Borman, MD	68	49%
Mark Gloger, MD	68	49%
Faisal Bhinder, MD	61	45%
Dominique Howard, MD	61	45%
Ramsey Daher, MD	60	44%
Karen Chachu	58	43%
Zilla Hussain, MD	50	38%
Barathi Sivasailam, MD	49	38%
Belen Tesfaye, MD	42	33%
Sneha Patel, MD	41	32%
Scott Friedberg, MD	40	32%
Georgia Richards, MD	26	23%
Jisun Hahn, MD	19	18%
Sarit Kipnis, MD	18	18%
Nalini Sharma, MD	13	14%
Folabomi Ajanaku, MD	1-10	13% or below
Angela Bien, MD	1-10	13% or below
Robert Hardi, MD	1-10	13% or below
Toufic Kabbani, MD	1-10	13% or below
Jesse Liu, MD	1-10	13% or below
Ibironke Oduyebo, MD	1-10	13% or below
Melik Tiba, MD	1-10	13% or below
Dawn Torres, MD	1-10	13% or below

Sorted by the number of colonoscopies billed to Medicare, highest first, not by quality or skill. CMS suppresses counts between 1 and 10 to protect patient privacy and publishes the range instead.

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).