Colonoscopy clinicians in Knoxville, Tennessee

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 Knoxville, Tennessee (details below).

Colonoscopy volume

Clinician	Colonoscopies billed	Percentile rank
Meade Edmunds, MD	579	99%
Juan Benitez, MD	396	98%
Sangeeta Gulati, MD	313	96%
Mark Lee, MD	290	95%
Carlos Rollhauser, MD	199	88%
John Haydek, MD	183	86%
Thomas Young, MD	178	85%
John Moore, MD	173	85%
Gary Spiegelman, MD	164	83%
Steven Bindrim, MD	154	81%
Harold Silver, MD	154	81%
Maria Newman, MD	153	81%
Jeffrey Gilbert, MD	151	80%
Jason Huffman, MD	151	80%
Kevin Meyers, MD	151	80%
William Ergen, MD	145	79%
Tejal Mistry, MD	143	78%
Johnny Altawil, MD	142	78%
Benjamin Dalton, MD	140	77%
Hannah Jones, DO	137	76%
Zachary Dickson, MD	131	75%
Jeffrey Brown, MD	128	74%
Robert Pollack, MD	128	74%
Ramanujan Samavedy	119	71%
Raj Narayani, MD	115	69%
Mahmoud Bayoumi, MD	112	68%
Shaker Barham, MD	102	65%
Steedman Sarbah, MD	101	64%
Omar Tageldin	90	60%
Muhammed Iqbal, MD	87	58%
Ravi Ghanta, MD	79	54%
Lindsey Shipley, MD	70	50%
Yeshaswini Panathur Sreenivasa Reddy, MD	57	43%
Mark Anderson, MD	56	42%
Michael Ellis, MD	51	39%
Randy Pardue, MD	42	34%
George Obeng, MD	40	33%
Samuel Purkey, DO	36	30%
Anabel Rodriguez Loya, DO	32	27%
Dhruvil Radadiya, MD	30	26%
Siva Maran, MD	26	23%
John Robertson, MD	17	17%
Jeffrey McMichael, MD	16	17%
James Hicks, 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).