Colonoscopy clinicians in Bloomington, Minnesota

CMS lists 51 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 Bloomington, Minnesota (details below).

Colonoscopy volume

Clinician	Colonoscopies billed	Percentile rank
Chimaobi Anugwom	141	78%
Neil Phelan, MD	117	70%
Aaron Brosam, MD	100	64%
Taiwo Ngwa, MD	99	64%
Edward Schaefer	91	60%
Alyssa Anderson	88	59%
Stephen Rudolph, MD	86	58%
Charoen Mankongpaisarnrung	84	57%
Krista Newman, MD	81	55%
Christopher Blevins, MD	78	54%
Dharma Sunjaya	75	52%
Patrick Hoversten, MD	74	52%
Ahmad Abdulkarim, MD	73	51%
Andrew Henn, MD	72	51%
Thomas Maust, MD	72	51%
Samantha Stoven, MD	72	51%
David Brokl, MD	65	47%
Mustafa Tiewala, MD	65	47%
Robert Ganz, MD	63	46%
Bertha Toriz, MD	63	46%
Leticia Perondi Luz, MD	59	44%
Jimmy Levine, MD	57	43%
Kirk Wilson, MD	57	43%
Kevin Quinn, MD	56	42%
Jason Erickson, MD	55	42%
Scott Keeley, MD	52	40%
Eric Nelsen, MD	52	40%
David Stolpman, MD	51	39%
Irshad Jafri, MD	50	39%
Parkpoom Phatharacharukul, MD	50	39%
Hashim Nemat, MD	49	38%
Patrick Oreilly, MD	49	38%
Elizabeth Fallon, MD	47	37%
Erica Roberson, MD	47	37%
Bryant Megna, MD	46	36%
Elliot Graziano, MD	45	36%
Anupama Nookala	45	36%
Harsh Parikh, MD	43	34%
Esther Connor, MD	40	33%
Zongyu Chen, MD	38	31%
Courtney Barancin, MD	37	31%
Yuri Hanada, MD	31	27%
Joanna Lenik-Oliva, MD	29	25%
Neville Basman, MD	26	23%
Ioannis Pothoulakis, MD	24	22%
Jeffrey Rank, MD	16	17%
Morgan Freeman	15	16%
Samuel Leon, MD	15	16%
Peter Ganzer, MD	1-10	13% or below
Lee Haggenjos, MD	1-10	13% or below
Lourdes Villaume, 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).