Colonoscopy clinicians in Santa Monica, California

CMS lists 71 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 Santa Monica, California (details below).

Colonoscopy volume

Clinician	Colonoscopies billed	Percentile rank
Hamed Nayeb-Hashemi, MD	173	85%
William Katkov, MD	171	84%
Michael Quon, MD	152	80%
Alireza Sedarat, MD	143	78%
Sean Lai, MD	136	76%
Rudolph Bedford, MD	132	75%
Danny Issa, MD	132	75%
Marc Wishingrad, MD	132	75%
Anna Skay, MD	126	73%
David Yamini, MD	119	71%
Kevin Ghassemi, MD	117	70%
James Sul, MD	106	66%
Lenna Martyak, MD	102	65%
Benjamin Nulsen, MD	100	64%
Steven Seizer, MD	95	62%
Sterling Dubin, MD	93	61%
Venkataraman Muthusamy, MD	93	61%
Kamyar Shahedi, MD	89	59%
Chanthel Kokoy Mondragon, MD	88	59%
Mark Ovsiowitz, MD	85	57%
Kareem Sassi, MD	85	57%
Devin Patel, MD	83	56%
Shahrad Shamsi, MD	82	56%
Kevork Khadarian, MD	79	54%
Ronald Omino, MD	79	54%
Demetrios Stavrakis, MD	76	53%
Stephen Kim, MD	73	51%
Adrienne Lenhart, MD	72	51%
Alexander Nguyen, MD	70	50%
Daisy Lankarani, MD	69	49%
Didi Mwengela, MD	69	49%
Samik Shah, MD	69	49%
Sadeea Abbasi, MD	68	49%
Adarsh Thaker, MD	65	47%
Sonya Dasharathy, MD	62	46%
Priyam Tripathi, MD	61	45%
Martha Hierro, MD	60	45%
Claudia Sanmiguel, MD	60	45%
Mona Rezapour, MD	58	44%
Terri Getzug	56	42%
Guy Weiss, MD	55	42%
Daniel Eshtiaghpour, MD	53	41%
Bao Sean Nguyen, MD	53	41%
Rahul Dixit, MD	50	39%
F Otis Stephen, MD	49	38%
Ellie Chen, MD	46	36%
Mary Farid, DO	44	35%
Andrew Gregg	41	33%
Carl Nordstrom, MD	41	33%
Anthony Myint, MD	40	33%
Vikas Pabby, MD	34	29%
Camille Soroudi, MD	33	28%
Jennifer Kolb, MD	31	27%
Uzoamaka Dike, MD	30	26%
Niharika Mallepally, MD	28	25%
Dennis Jensen, MD	27	24%
Gaurav Syal, MD	27	24%
Shida Haghighat, MD	26	23%
Nimah Ather, MD	25	23%
Vivy Cusumano, MD	24	22%
Amanda Krause, MD	21	20%
Berkeley Limketkai, MD	16	17%
Dorian Mendoza, MD	15	16%
Lynn Connolly, MD	14	15%
Nirali Sheth, DO	14	15%
Martin Alpert, MD	1-10	13% or below
Nirupama Bonthala, MD	1-10	13% or below
David Chen, MD	1-10	13% or below
Amir Ghaffari, MD	1-10	13% or below
Brian Horwich, MD	1-10	13% or below
Jason Pan, 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).