Colonoscopy clinicians in Charleston, South Carolina

CMS lists 48 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	545	99%
Kenneth Payne, MD	340	97%
Alejandro Suarez, MD	316	96%
Marc Noble, MD	304	96%
James Schnell, MD	297	96%
Robert Smith, MD	296	96%
Christian Clark, MD	246	93%
Andrew Brock, MD	237	92%
Eddie Irions, MD	227	92%
Brenda Hoffman, MD	207	90%
Lori Robbins, MD	205	89%
William Marsteller, MD	195	88%
Amit Agrawal, MD	143	78%
Michael Sagatelian, MD	140	77%
John Litchfield, DO	131	75%
Cameron Wilhoit, MD	131	75%
Derek Feussner, MD	123	72%
Rya Kaplan, MD	123	72%
David Kruchko, DO	116	70%
Erin Forster, MD	105	66%
Puja Elias	104	66%
Andrew Wolf, MD	104	66%
Jonathan Reichstein, MD	89	59%
Chuma Obineme, MD	88	59%
Caitlin Green, MD	86	58%
Salvatore Moscatello, DO	86	58%
Haily Vora, MD	86	58%
Gregory Habig, MD	80	55%
Ryan Beyer, MD	77	53%
Kristen Miller, MD	51	39%
Garth Swanson, MD	47	36%
Robert Moran, MD	40	32%
Kathy Williams, MD	36	29%
Amol Sharma, MD	29	25%
Michael Rajala, MD	25	22%
Heather Simpson, MD	24	21%
David Koch, MD	20	19%
Don Rockey, MD	16	16%
Thomas Werth, MD	13	14%
Alexander Podboy, MD	11	13%
John Corless, 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.

Reported in previous releases

CMS does not report a colonoscopy volume for these clinicians in the October 2, 2026 release. Their pages show figures from earlier releases.

Thaddeus Bell Last reported August 18, 2026
Dennis Besong, MD Last reported August 18, 2026

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).