Colonoscopy clinicians in Stanford, California

CMS lists 65 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
Subhas Banerjee, MD	229	92%
Harvey Young, MD	226	91%
Tu Nguyen, MD	163	83%
Hemnishil Marella, DO	146	79%
Mike Wei, MD	137	76%
Allison Zhang, DO	124	73%
Andrew Li, MD	116	70%
Karen Kim, MD	112	68%
Samer Eldika, MD	108	67%
Suejin Kim, MD	104	66%
Sundeep Singh, MD	102	65%
Rahul Verma, MD	93	61%
Kian Keyashian, MD	87	58%
Christopher Entwisle, MD	85	57%
James Lin, MD	85	57%
Uri Ladabaum, MD	65	47%
Pradeep Siddappa, MD	61	45%
David Limsui, MD	60	45%
Aaron Yeoh, MD	57	43%
David Goldenberg, MD	56	42%
Harpriya Singh, MD	56	42%
Robert Huang, MD	53	41%
Monique Barakat, MD	52	40%
Irene Sonu, MD	50	39%
John Clarke, MD	45	36%
Walter Park, MD	44	35%
Sajid Jalil, MD	43	34%
Shai Friedland, MD	40	33%
Patricia Garcia, MD	38	31%
Yi Jiang, MD	38	31%
Kayvon Sotoudeh, MD	36	30%
Alice Lee, MD	35	29%
Yan Jiang, MD	34	29%
Samuel Marcus, MD	30	26%
Ikponmwosa Enofe, MD	29	25%
Nielsen Fernandez-Becker, MD	29	25%
Sean Spencer, MD	28	25%
Amir Gougol, MD	27	24%
Afrin Kamal, MD	27	24%
Nikki Duong, MD	25	23%
Sarah Streett, MD	25	23%
Margaret Zhou, MD	25	23%
Leila Neshatian, MD	23	22%
Chiazotam Ekekezie, MD	22	21%
Sidhartha Sinha, MD	22	21%
Grant Barber, MD	21	20%
Edith Ho, MD	19	19%
Joo Hwang, MD	19	19%
Roger Sands, MD	18	18%
Laren Becker, MD	17	17%
Tahereh Ghaziani, MD	17	17%
Aparna Goel, MD	14	15%
Gopanandan Parthasarathy, MD	14	15%
Nathan Kim, MD	13	15%
Damanpreet Grewal, MD	12	14%
Renumathy Dhanasekaran, MD	11	13%
Paul Kwo, MD	11	13%
Aijaz Ahmed, MD	1-10	13% or below
Tami Daugherty, MD	1-10	13% or below
Smit Deliwala, MD	1-10	13% or below
Jennifer Dimino, MD	1-10	13% or below
Deepti Dronamraju, MD	1-10	13% or below
Chiraag Kulkarni, 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 (August 18, 2026 release).