Colonoscopy clinicians in Glenview, Illinois

CMS lists 44 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	570	99%
Yolandra Johnson, MD	481	99%
Jeffrey Jacobs, MD	202	89%
Dhiren Shah, MD	164	83%
Matthew Tick, DO	147	79%
Farhan Quader, MD	131	75%
Nina Merel, MD	128	74%
Christian Stevoff, MD	123	72%
Ronald Bloom, MD	116	70%
Baseer Qazi, MD	112	69%
Ioannis Economou, MD	111	68%
Kenneth Chi, MD	110	68%
Shailesh Bajaj, MD	108	67%
David Shapiro, MD	107	67%
Susannah Spiess, MD	105	66%
Rebecca Tsang	102	65%
Soojong Chae, MD	101	65%
Monica Borkar, MD	96	63%
David Labowitz, DO	78	54%
Meghana Doniparthi, MD	65	47%
Roshni Jain, MD	58	43%
Jeremy Van, DO	55	41%
Darren Brenner, MD	52	40%
Venkata Satyam, MD	49	38%
Armani Patel, MD	48	37%
Stephanie Betcher, MD	46	36%
Alan Shapiro, MD	46	36%
Sarah Burroughs, DO	44	34%
Dharani Guttikonda, MD	38	30%
Kelly Miller, MD	38	30%
Purnima Balachandran, MD	23	21%
Paul Klaassen, MD	21	20%
Justin Baker, MD	17	17%
Jason Nesmith, MD	14	15%
Bennett Plotnick, MD	14	15%
Jason Hampl, MD	12	14%
Thomas Neumann, MD	12	14%
Christopher Wright, MD	12	14%
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
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 (October 2, 2026 release).