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	557	99%
Juan Benitez, MD	351	97%
Sangeeta Gulati, MD	320	96%
Mark Lee, MD	295	96%
Carlos Rollhauser, MD	191	87%
John Haydek, MD	180	86%
John Moore, MD	174	85%
Benjamin Dalton, MD	172	85%
Thomas Young, MD	168	84%
Maria Newman, MD	165	83%
Gary Spiegelman, MD	159	82%
Jeffrey Gilbert, MD	154	81%
Harold Silver, MD	148	79%
Johnny Altawil, MD	147	79%
Steven Bindrim, MD	144	78%
William Ergen, MD	142	78%
Jason Huffman, MD	139	77%
Kevin Meyers, MD	135	76%
Hannah Jones, DO	132	75%
Jeffrey Brown, MD	131	75%
Zachary Dickson, MD	125	73%
Robert Pollack, MD	125	73%
Mahmoud Bayoumi, MD	121	72%
Tejal Mistry, MD	117	70%
Ramanujan Samavedy	115	70%
Raj Narayani, MD	110	68%
Lindsey Shipley, MD	104	66%
Shaker Barham, MD	99	64%
Steedman Sarbah, MD	98	63%
Ravi Ghanta, MD	85	58%
Muhammed Iqbal, MD	81	55%
Yeshaswini Panathur Sreenivasa Reddy, MD	76	53%
Omar Tageldin	76	53%
George Obeng, MD	66	47%
Samuel Purkey, DO	60	44%
Dhruvil Radadiya, MD	44	34%
Randy Pardue, MD	43	34%
Mark Anderson, MD	42	33%
Michael Ellis, MD	40	32%
Anabel Rodriguez Loya, DO	34	28%
Siva Maran, MD	24	21%
Jeffrey McMichael, MD	23	21%
John Robertson, MD	16	16%
James Hicks, MD	12	14%

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 (October 2, 2026 release).