Colonoscopy clinicians in Grand Rapids, Michigan

CMS lists 45 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 Grand Rapids, Michigan (details below).

Colonoscopy volume

Clinician	Colonoscopies billed	Percentile rank
Matthew Moeller, MD	130	74%
Muhammad Azrak, MD	129	74%
Thomas Rupp, MD	95	62%
Aref Alrayes, MD	94	62%
Bret Autrey, DO	93	61%
Robbie Taha, DO	87	58%
Robert Bischoff, DO	76	53%
Daniel Havlichek, MD	73	51%
Alexander Stojanovic, MD	72	51%
Bradford Whitmer, DO	72	51%
Ben Kieff, MD	69	49%
Christopher Radawski, MD	67	48%
Matthew Nelson, MD	66	48%
Courtney Ferch, MD	64	47%
Randall Meisner, MD	62	46%
Eugene Zolotarevsky, MD	58	44%
Andrew Shreiner, MD	55	42%
Patrick Brown, DO	54	41%
Lia Kaufman, MD	53	41%
Jesse Hartpence	50	39%
Jeremy Barber, DO	47	37%
Benjamin Dozeman, DO	47	37%
Wael Dahhan, MD	44	35%
Christopher Hakim, MD	43	34%
Srinivas Janardan, MD	43	34%
Asif Azeem, MD	42	34%
Krishna Meka, DO	42	34%
Lindsay Negash, DO	40	33%
David Zink, MD	40	33%
Ryan Wong, MD	36	30%
Catherine Bartnik	35	29%
Marc Herschfus, MD	34	29%
Jay Morrow, MD	33	28%
Dana Stewart, DO	33	28%
Tiffany Jarois, DO	32	27%
Christopher Murphy, MD	32	27%
Stephen Simmer, MD	30	26%
Curtis Weaver, MD	27	24%
Mark Cooper, MD	26	23%
Tammy Tran-Yang, DO	25	23%
Aditi Saxena, MD	24	22%
John Papp, MD	23	22%
Michael Puff, MD	14	15%
Gregory Osborne, MD	13	15%
Rashmi Juneja, MD	11	13%

Sorted by the number of colonoscopies billed to Medicare, highest first, not by quality or skill.

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).