Colonoscopy clinicians in Stanford, California

CMS lists 64 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 Stanford, California (details below).

Colonoscopy volume

Clinician	Colonoscopies billed	Percentile rank
Harvey Young, MD	236	92%
Subhas Banerjee, MD	208	90%
Hemnishil Marella, DO	164	83%
Mike Wei, MD	163	83%
Tu Nguyen, MD	149	80%
Andrew Li, MD	126	73%
Samer Eldika, MD	114	69%
Karen Kim, MD	111	68%
Sundeep Singh, MD	108	67%
Suejin Kim, MD	104	66%
Allison Zhang, DO	102	65%
Rahul Verma, MD	94	62%
Christopher Entwisle, MD	92	61%
Kian Keyashian, MD	91	60%
James Lin, MD	88	59%
Samuel Marcus, MD	81	55%
Pradeep Siddappa, MD	64	46%
Harpriya Singh, MD	64	46%
Aaron Yeoh, MD	64	46%
Uri Ladabaum, MD	63	46%
David Limsui, MD	63	46%
David Goldenberg, MD	62	45%
Irene Sonu, MD	61	45%
John Clarke, MD	56	42%
Robert Huang, MD	51	39%
Kayvon Sotoudeh, MD	50	38%
Yi Jiang, MD	46	36%
Sajid Jalil, MD	45	35%
Shai Friedland, MD	43	34%
Patricia Garcia, MD	42	33%
Walter Park, MD	41	32%
Yan Jiang, MD	38	30%
Monique Barakat, MD	35	28%
Afrin Kamal, MD	34	28%
Margaret Zhou, MD	34	28%
Nielsen Fernandez-Becker, MD	33	27%
Alice Lee, MD	33	27%
Leila Neshatian, MD	33	27%
Grant Barber, MD	26	23%
Nikki Duong, MD	26	23%
Amir Gougol, MD	26	23%
Sarah Streett, MD	26	23%
Edith Ho, MD	25	22%
Sean Spencer, MD	25	22%
Sidhartha Sinha, MD	22	20%
Chiazotam Ekekezie, MD	20	19%
Gopanandan Parthasarathy, MD	19	18%
Jennifer Dimino, MD	18	18%
Roger Sands, MD	18	18%
Tahereh Ghaziani, MD	17	17%
Nathan Kim, MD	17	17%
Laren Becker, MD	15	16%
Aparna Goel, MD	15	16%
Joo Hwang, MD	15	16%
Renumathy Dhanasekaran, MD	14	15%
Damanpreet Grewal, MD	12	14%
Aijaz Ahmed, MD	1-10	13% or below
Tami Daugherty, MD	1-10	13% or below
Smit Deliwala, MD	1-10	13% or below
Deepti Dronamraju, MD	1-10	13% or below
Chiraag Kulkarni, MD	1-10	13% or below
Paul Kwo, MD	1-10	13% or below
Allison Kwong, MD	1-10	13% or below
Sunny Sandhu, 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 (October 2, 2026 release).