Colonoscopy clinicians in Rochester, Minnesota

CMS lists 76 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 Rochester, Minnesota (details below).

Colonoscopy volume

Clinician	Colonoscopies billed	Percentile rank
Nayantara Coelho-Prabhu	165	83%
Thomas Viggiano, MD	163	83%
David Bruining, MD	157	82%
Robert Sedlack, MD	157	82%
Navtej Buttar, MD	156	81%
Seth Sweetser, MD	139	77%
Yakira David	138	77%
Louis Wong Kee Song, MD	101	64%
Elizabeth Rajan, MD	98	63%
Mark Larson, MD	82	56%
George Marek, MD	76	53%
Randall Pearson, MD	74	52%
Robert Kraichely, MD	70	50%
Don Codipilly, MD	67	48%
Vandana Nehra, MD	67	48%
Siri Urquhart	65	47%
Jayant Talwalkar, MD	63	46%
Ming-Hsi Wang	63	46%
Motaz Ashkar	62	46%
Xiao Jing Wang, MD	62	46%
Adam Bledsoe, MD	61	45%
Varan Perananthan, MD	60	45%
Kornpong Vantanasiri, MD	56	42%
Jeffrey Alexander, MD	55	42%
Cadman Leggett, MD	55	42%
Derek Ebner	54	41%
Daniel Maselli, MD	53	41%
Konstantinos Papadakis, MD	51	39%
Stephanie Hansel, MD	50	39%
Nicholas Oblizajek	49	38%
Daniel Schupack, MD	46	36%
John Eaton, MD	45	36%
Eric Vargas Valls, MD	45	36%
Glenn Alexander, MD	44	35%
Jad Abimansour	41	33%
Houssam Halawi, MD	41	33%
Edward Loftus, MD	41	33%
Diana Snyder, MD	41	33%
Patrick Kamath, MD	38	31%
Karthik Ravi, MD	35	29%
Michael Kattah, MD	33	28%
Michael Leise, MD	32	27%
Tiffany Wu, MD	32	27%
Navreet Chowla, MD	31	27%
Bret Petersen, MD	30	26%
Ryan Law, DO	28	25%
John Martin, MD	26	23%
Victor Chedid, MD	25	23%
Yuri Saito Loftus, MD	25	23%
William Sanchez, MD	23	22%
Aaron Hecht	19	19%
Sunanda Kane, MD	19	19%
Harmeet Malhi, MD	18	18%
Laura Raffals, MD	18	18%
Amanda Johnson, MD	17	17%
Patricia Bloom, MD	16	17%
Dawn Francis, MD	16	17%
Madhusudan Grover, MD	15	16%
Andrew Storm, MD	13	15%
David Chiang, MD	12	14%
Andres Acosta	11	13%
Purna Kashyap	11	13%
Manal Abdelmalek, MD	1-10	13% or below
Arthur Beyder, MD	1-10	13% or below
Michael Camilleri, MD	1-10	13% or below
Vinay Chandrasekhara, MD	1-10	13% or below
Christopher Gostout, MD	1-10	13% or below
Samuel Han, MD	1-10	13% or below
Sahil Khanna, MD	1-10	13% or below
Konstantinos Lazaridis, MD	1-10	13% or below
Shounak Majumder	1-10	13% or below
Joseph Murray, MD	1-10	13% or below
Eric Poulin, MD	1-10	13% or below
Lewis Roberts, MD	1-10	13% or below
Dennis Shung, MD	1-10	13% or below
Mark Topazian, 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).