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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
Robert Sedlack, MD 179 86%
Navtej Buttar, MD 169 84%
Nayantara Coelho-Prabhu 169 84%
David Bruining, MD 156 81%
Thomas Viggiano, MD 150 80%
Seth Sweetser, MD 144 78%
George Marek, MD 128 74%
Yakira David 117 70%
Louis Wong Kee Song, MD 104 66%
Elizabeth Rajan, MD 99 64%
Mark Larson, MD 96 63%
Robert Kraichely, MD 93 61%
Daniel Maselli, MD 91 60%
Siri Urquhart 91 60%
Cadman Leggett, MD 87 59%
Motaz Ashkar 86 58%
Varan Perananthan, MD 80 55%
Adam Bledsoe, MD 78 54%
Ming-Hsi Wang 77 53%
Randall Pearson, MD 76 53%
Kornpong Vantanasiri, MD 72 51%
Vandana Nehra, MD 71 50%
Don Codipilly, MD 69 49%
Konstantinos Papadakis, MD 67 48%
Jayant Talwalkar, MD 67 48%
Derek Ebner 63 46%
Xiao Jing Wang, MD 61 45%
Glenn Alexander, MD 60 44%
Jeffrey Alexander, MD 58 43%
Nicholas Oblizajek 55 41%
John Eaton, MD 54 41%
Houssam Halawi, MD 52 40%
Diana Snyder, MD 52 40%
Daniel Schupack, MD 51 39%
Michael Kattah, MD 48 37%
Tiffany Wu, MD 48 37%
Stephanie Hansel, MD 46 36%
Navreet Chowla, MD 45 35%
Michael Leise, MD 42 33%
Edward Loftus, MD 36 29%
Victor Chedid, MD 34 28%
Eric Vargas Valls, MD 34 28%
Ryan Law, DO 31 26%
Jad Abimansour 30 25%
Yuri Saito Loftus, MD 30 25%
John Martin, MD 28 24%
Patrick Kamath, MD 26 23%
Bret Petersen, MD 26 23%
Karthik Ravi, MD 26 23%
Amanda Johnson, MD 25 22%
Dawn Francis, MD 19 18%
Harmeet Malhi, MD 18 18%
Aaron Hecht 17 17%
David Chiang, MD 15 16%
Sunanda Kane, MD 15 16%
Patricia Bloom, MD 14 15%
William Sanchez, MD 14 15%
Andres Acosta 13 14%
Arthur Beyder, MD 13 14%
Laura Raffals, MD 12 14%
Madhusudan Grover, MD 11 13%
Lewis Roberts, MD 11 13%
Manal Abdelmalek, MD 1-10 13% or below
Adil Bharucha, 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
Purna Kashyap 1-10 13% or below
Sahil Khanna, 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
Dennis Shung, MD 1-10 13% or below
Andrew Storm, 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.

Reported in previous releases

CMS does not report a colonoscopy volume for these clinicians in the October 2, 2026 release. Their pages show figures from earlier releases.

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).