Colonoscopy clinicians in Charleston, South Carolina

CMS lists 49 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 Charleston, South Carolina (details below).

Colonoscopy volume

Clinician	Colonoscopies billed	Percentile rank
Theodore Gourdin, MD	539	99%
Marc Noble, MD	301	96%
James Schnell, MD	301	96%
Alejandro Suarez, MD	301	96%
Kenneth Payne, MD	291	96%
Robert Smith, MD	289	95%
Christian Clark, MD	239	93%
Andrew Brock, MD	221	91%
Lori Robbins, MD	212	90%
Eddie Irions, MD	202	89%
Brenda Hoffman, MD	180	86%
William Marsteller, MD	172	84%
Amit Agrawal, MD	144	79%
John Litchfield, DO	143	78%
Michael Sagatelian, MD	127	73%
Cameron Wilhoit, MD	125	73%
Derek Feussner, MD	120	71%
Andrew Wolf, MD	110	68%
Rya Kaplan, MD	102	65%
David Kruchko, DO	94	62%
Jonathan Reichstein, MD	87	58%
Puja Elias	84	57%
Caitlin Green, MD	82	56%
Erin Forster, MD	81	55%
Salvatore Moscatello, DO	77	54%
Chuma Obineme, MD	77	54%
Ryan Beyer, MD	63	46%
Garth Swanson, MD	47	37%
Gregory Habig, MD	42	34%
Robert Moran, MD	34	29%
Amol Sharma, MD	33	28%
John Corless, MD	32	27%
Kristen Miller, MD	32	27%
Heather Simpson, MD	24	22%
Kathy Williams, MD	21	20%
David Koch, MD	20	19%
Don Rockey, MD	19	19%
Michael Rajala, MD	17	17%
Alexander Podboy, MD	16	17%
Thomas Werth, MD	12	14%
Thaddeus Bell	1-10	13% or below
Dennis Besong, MD	1-10	13% or below
Thomas Faust, MD	1-10	13% or below
Sherif Ibrahim, MD	1-10	13% or below
Samuel Mardini, MD	1-10	13% or below
Amanda Overstreet, DO	1-10	13% or below
Mansour Parsi, MD	1-10	13% or below
Andrew Sanderson, MD	1-10	13% or below
Ira Willner, 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).