Colonoscopy clinicians in Glenview, Illinois

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 Glenview, Illinois (details below).

Colonoscopy volume

Clinician	Colonoscopies billed	Percentile rank
Jonathan Williams, DO	586	99%
Yolandra Johnson, MD	512	99%
Jeffrey Jacobs, MD	187	87%
Dhiren Shah, MD	162	82%
Matthew Tick, DO	149	80%
Rebecca Tsang	130	74%
Farhan Quader, MD	129	74%
Bruce Greenberg, MD	121	71%
Shailesh Bajaj, MD	120	71%
Nina Merel, MD	119	71%
Ronald Bloom, MD	112	68%
Susannah Spiess, MD	109	67%
David Shapiro, MD	108	67%
Kenneth Chi, MD	100	64%
Baseer Qazi, MD	99	64%
David Labowitz, DO	97	63%
Monica Borkar, MD	86	58%
Soojong Chae, MD	86	58%
Ioannis Economou, MD	80	55%
Alan Shapiro, MD	79	54%
Venkata Satyam, MD	65	47%
Meghana Doniparthi, MD	59	44%
Darren Brenner, MD	48	38%
Dharani Guttikonda, MD	47	37%
Kelly Miller, MD	43	34%
Armani Patel, MD	42	34%
Roshni Jain, MD	40	33%
Purnima Balachandran, MD	37	31%
Jeremy Van, DO	37	31%
Bennett Plotnick, MD	32	27%
Stephanie Betcher, MD	28	25%
Sarah Burroughs, DO	26	23%
Justin Baker, MD	18	18%
Paul Klaassen, MD	17	17%
Jason Hampl, MD	14	15%
Jason Nesmith, MD	14	15%
Thomas Neumann, MD	14	15%
Christopher Wright, MD	13	15%
Joseph Ahn, MD	1-10	13% or below
Sabry Gabriel, MD	1-10	13% or below
Johnathan Leck, MD	1-10	13% or below
Michael Levin, MD	1-10	13% or below
Marga Ngwang, MD	1-10	13% or below
Andrew Ross, MD	1-10	13% or below
Bradley Sawtelle, 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).