Colonoscopy clinicians in Bloomington, Minnesota

CMS lists 53 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	123	72%
Krista Newman, MD	112	69%
Charoen Mankongpaisarnrung	104	66%
Alyssa Anderson	94	62%
Aaron Brosam, MD	92	61%
Stephen Rudolph, MD	92	61%
Edward Schaefer	89	59%
Taiwo Ngwa, MD	87	59%
Ahmad Abdulkarim, MD	85	58%
Samantha Stoven, MD	79	54%
Christopher Blevins, MD	77	53%
Dharma Sunjaya	77	53%
Joanna Lenik-Oliva, MD	74	52%
Robert Ganz, MD	73	51%
Thomas Maust, MD	71	50%
Andrew Henn, MD	70	50%
Mustafa Tiewala, MD	68	49%
Adam Kim, MD	66	47%
Bertha Toriz, MD	64	46%
Kirk Wilson, MD	64	46%
David Stolpman, MD	61	45%
Bryant Megna, MD	60	44%
Kevin Quinn, MD	60	44%
Parkpoom Phatharacharukul, MD	58	43%
Scott Keeley, MD	57	42%
Eric Nelsen, MD	57	42%
David Brokl, MD	54	41%
Hashim Nemat, MD	53	40%
Patrick Oreilly, MD	53	40%
Ahmed Kandiel, MD	52	40%
Anupama Nookala	49	38%
Jason Erickson, MD	48	37%
Elliot Graziano, MD	47	36%
Irshad Jafri, MD	46	36%
Zongyu Chen, MD	44	34%
Yuri Hanada, MD	44	34%
James Levine, MD	44	34%
Erica Roberson, MD	44	34%
Harsh Parikh, MD	43	34%
Elizabeth Fallon, MD	41	32%
Neville Basman, MD	37	30%
Ioannis Pothoulakis, MD	37	30%
Morgan Freeman	36	29%
Leticia Perondi Luz, MD	36	29%
Esther Connor, MD	35	28%
Patrick Hoversten, MD	35	28%
Courtney Barancin, MD	27	23%
Samuel Leon, MD	17	17%
Peter Ganzer, MD	1-10	13% or below
Lee Haggenjos, MD	1-10	13% or below
Jeffrey Rank, 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 (October 2, 2026 release).