Colonoscopy clinicians in Durham, North Carolina

CMS lists 66 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 Durham, North Carolina (details below).

Colonoscopy volume

Clinician	Colonoscopies billed	Percentile rank
Neeraj Sachdeva, MD	164	83%
Iris Vance, MD	129	74%
Jeremy Glissen Brown, MD	103	65%
Justin Crocker, MD	85	57%
Teodoro Toledo, MD	84	57%
Ami Patel, MD	83	56%
Angela Hira, DO	81	55%
Matthew Rein, MD	81	55%
Scott Manski, MD	79	54%
Daniel Wild, MD	79	54%
Benjamin Lloyd	76	53%
Cameron Locklear, MD	76	53%
Jorge Obando, MD	75	52%
Amy Barto, MD	73	51%
David Tendler, MD	70	50%
Darin Dufault, MD	68	49%
Karen Chachu	63	46%
Robin Zachariah, MD	63	46%
Lauren Pioppo Phelan, MD	62	46%
Laura Bach, DO	60	45%
Michael Feiler, MD	60	45%
Rebecca Burbridge, MD	59	44%
Melissa Teitelman, MD	58	44%
Joshua Lee, MD	55	42%
Steven Russo, DO	51	39%
Bryan Badal, MD	49	38%
Angela Hutzenbuhler, MD	48	38%
Natalie Wong, MD	48	38%
Joshua Spaete	47	37%
Richard Wood, MD	47	37%
Paul Cassis, MD	46	36%
Omobonike Oloruntoba, MD	46	36%
Nicole Jawitz, MD	45	36%
Sahar Ghassemi, MD	43	34%
Richard Lee, MD	42	34%
Jane Onken, MD	42	34%
Rohini Vanga, MD	42	34%
Annmarie Kieber-Emmons, MD	38	31%
Julius Wilder, MD	38	31%
Darshan Kothari, MD	35	29%
Jinyu Zhang, MD	35	29%
Stephanie Garbarino, MD	29	25%
Sabrina Layne, MD	29	25%
Alyson Johnson, MD	25	23%
Carla Brady, MD	24	22%
David Leiman	24	22%
Kara Wegermann, MD	23	22%
Amreen Dinani, MD	21	20%
Jennifer Dziwis, MD	21	20%
Mahfuzul Haque, MD	21	20%
Paul Jowell, MD	21	20%
Melanie Cabezas, MD	18	18%
Ghulam Shaikh, MD	18	18%
Matthew Kappus, MD	17	17%
Talisha Ramchal, MD	16	17%
Malcolm Branch, MD	13	15%
William Clarke, MD	13	15%
Katherine Garman, MD	12	14%
Katherine Allen, MD	1-10	13% or below
Beth Floyd, MD	1-10	13% or below
John Geneczko, MD	1-10	13% or below
Jacqueline Henson, MD	1-10	13% or below
Hayley Rogers	1-10	13% or below
Jatin Roper, MD	1-10	13% or below
Maria Segovia, MD	1-10	13% or below
Nancy Yang, 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).