Colonoscopy clinicians in Minneapolis, Minnesota

CMS lists 61 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 Minneapolis, Minnesota (details below).

Colonoscopy volume

Clinician	Colonoscopies billed	Percentile rank
Neil Phelan, MD	123	72%
Stephen Rudolph, MD	92	61%
Robert Ganz, MD	73	51%
April Grudell, MD	73	51%
Adam Kim, MD	66	47%
Robert Matlock, MD	65	47%
Stanley Go, MD	64	46%
Bertha Toriz, MD	64	46%
Kirk Wilson, MD	64	46%
Patrick Oreilly, MD	53	40%
Ahmed Kandiel, MD	52	40%
Catherine Skagen, MD	52	40%
Mauricio Torrealba Alonso, MD	50	38%
Justin Howard, MD	49	38%
John Liveringhouse, MD	48	37%
Christopher Steevens	48	37%
Zongyu Chen, MD	44	34%
James Levine, MD	44	34%
Erica Roberson, MD	44	34%
Nicholas Boetticher, MD	41	32%
Elizabeth Fallon, MD	41	32%
Ahmed Dirweesh	40	32%
Peter Pico, MD	38	30%
Neville Basman, MD	37	30%
Jason Eckmann, MD	37	30%
Ahmad Malli, MD	37	30%
Dahlia Awais, MD	35	28%
Aaron Link, MD	31	26%
Byron Vaughn, MD	31	26%
Shahnaz Sultan, MD	28	24%
Nabeel Azeem, MD	27	23%
Courtney Barancin, MD	27	23%
James Mallery, MD	26	23%
Alexander Khoruts, MD	25	22%
Jeffrey Albrecht, MD	24	21%
Scott Ketover, MD	23	21%
Eugenia Shmidt, MD	23	21%
Irfan Sandozi, MD	21	20%
Joshua Colton, MD	19	18%
David Leung, MD	19	18%
Jose Debes, MD	15	16%
Denise Hunninghake, MD	13	14%
Kristin McBeath, DO	13	14%
Sandra Denman, MD	11	13%
Douglas Nelson, MD	11	13%
Joshua Sloan, DO	11	13%
Elizabeth Aby, MD	1-10	13% or below
Stuart Amateau, MD	1-10	13% or below
Petrus De Groen, MD	1-10	13% or below
Sara Frankwick, MD	1-10	13% or below
Martin Freeman, MD	1-10	13% or below
Peter Ganzer, MD	1-10	13% or below
Jennifer Haglund, MD	1-10	13% or below
Thomas Leventhal, MD	1-10	13% or below
Nasim Parsa, MD	1-10	13% or below
Jeffrey Rank, MD	1-10	13% or below
Julie Thompson, MD	1-10	13% or below
Mary Thomson, MD	1-10	13% or below
Guru Trikudanathan, MD	1-10	13% or below
Kimberly Viskocil, MD	1-10	13% or below
Alexa Weingarden, 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).