Colonoscopy clinicians in Baltimore, Maryland

CMS lists 119 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 Baltimore, Maryland (details below).

Colonoscopy volume

Clinician	Colonoscopies billed	Percentile rank
Sergey Kantsevoy, MD	431	99%
Niraj Jani, MD	377	98%
Richard Desi, MD	373	98%
Eun Shin, MD	353	97%
Scott Huber, MD	339	97%
Patrick Hyatt, MD	289	95%
Saowanee Ngamruengphong, MD	265	94%
James Corkum, MD	244	93%
Matilda Hagan, MD	236	92%
Gary Thompson, MD	236	92%
Calvin Parker, MD	235	92%
Rohan Mandaliya, MD	222	91%
Ruben Khan, MD	207	89%
Jonathan Schreiber, MD	202	89%
Lawrence Mills, MD	199	88%
Jahangir Khan, MD	182	86%
Abhinav Sankineni, MD	181	86%
Michael Asike, MD	177	85%
Lester Bowser, MD	171	84%
Mark Diamond, MD	164	83%
Anthony Kalloo, MD	154	81%
Dana Sloane, MD	154	81%
Bedoor Alabbas, MD	152	80%
David Hutcheon, MD	150	80%
Mouen Khashab, MD	150	80%
John Rabine, MD	148	80%
Dhanush Hoskere, DO	144	79%
Joseph Lin, MD	139	77%
Raymond Cross, MD	137	76%
Abhijit Bhatia, MD	135	76%
Tahir Shaikh, MD	131	75%
Olaya Brewer Gutierrez, MD	129	74%
Anusha Vittal, MD	121	71%
Robert Bulat, MD	115	69%
Vinshi Khan, MD	109	67%
Christopher Kim, MD	107	67%
Anurag Maheshwari, MD	107	67%
Alan Chen, MD	103	65%
Venkata Akshintala, MD	99	64%
Hassan Ghoz, MD	98	63%
Merve Gurakar, MD	98	63%
Mohammad Khan, MD	97	63%
Mark Lazarev, MD	96	62%
Jasmine Barrow, MD	92	61%
Ekta Gupta, MD	91	60%
George Kunnackal John, MD	87	58%
Samer Charbel, MD	86	58%
Bryan Curtin, MD	83	56%
Alia Dadabhai, MD	83	56%
Gerard Mullin, MD	82	56%
Reezwana Chowdhury, MD	77	54%
Sudhir Dutta, MD	77	54%
Eric Goldberg, MD	77	54%
Monika Lammi, MD	76	53%
Hazel Veloso, MD	73	51%
Sasan Sakiani, MD	70	50%
Aline Charabaty Pishvaian, MD	65	47%
Lauren George, MD	65	47%
Mian Khalid, MD	61	45%
Zara Manuelyan, MD	57	43%
Ashish Nimgaonkar, MD	57	43%
Marcia Canto, MD	55	42%
Zadid Haq, MD	55	42%
Maen Kamal, MD	55	42%
Vikesh Singh, MD	55	42%
Abdulhameed Al-Sabban, MD	54	41%
Maaza Abdi, MD	53	41%
Dania Hudhud, MD	50	39%
John Affronti, MD	49	38%
Eduardo Gonzalez-Velez, MD	48	38%
Paul Thuluvath, MD	48	38%
Sara Yacyshyn, MD	47	37%
Kanhai Farrakhan, MD	43	34%
Neha Jakhete, MD	41	33%
Elham Afghani, MD	39	32%
Ali Alsayed Hussain, MD	39	32%
Nathalie Urrunaga, MD	39	32%
Bruce Greenwald, MD	38	31%
Margaret Keane, MD	38	31%
Jose Parungao, MD	38	31%
Omer Shahab, MD	36	30%
Angelica Nocerino, MD	34	29%
Anwar Khokhar, MD	31	27%
Hyun Ji, MD	29	25%
James Hamilton, MD	28	25%
Sameer Khan, MD	28	25%
Romik Srivastava, MD	27	24%
Bilal Ali, MD	26	23%
Michelle Ma, MD	23	22%
Disha Sharma, MD	23	22%
Tsion Abdi, MD	22	21%
Florin Selaru, MD	22	21%
Peter Darwin, MD	19	19%
Anita Sivaraman, MD	18	18%
Mohammed El-Dallal, MD	17	17%
Abdalla Khouqeer, MD	16	17%
Ken Hui, MD	15	16%
Moorkath Unni, MD	15	16%
Tinsay Woreta, MD	15	16%
Yousef Fazel, MD	14	15%
Zachariah Foda, MD	14	15%
Kathy Bull-Henry, MD	13	15%
Michael Goggins, MD	12	14%
John Abel, MD	1-10	13% or below
Mateen Awan, MD	1-10	13% or below
Naresh Khanna, MD	1-10	13% or below
Iris Lee, MD	1-10	13% or below
Filipa Ligeiro, MD	1-10	13% or below
Zurabi Lominadze, MD	1-10	13% or below
Joanna Melia, MD	1-10	13% or below
Adrienne Nguyen, MD	1-10	13% or below
Sandra Quezada, MD	1-10	13% or below
Amol Rangnekar, MD	1-10	13% or below
Linda Rosenthal, MD	1-10	13% or below
Kirti Shetty, MD	1-10	13% or below
Bipin Turakhia, MD	1-10	13% or below
Erik Vonrosenvinge, MD	1-10	13% or below
Jordan Wolff, MD	1-10	13% or below
Guofeng Xie, 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 (August 18, 2026 release).