Colonoscopy clinicians in Redwood City, California

CMS lists 37 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 Redwood City, California (details below).

Colonoscopy volume

Clinician	Colonoscopies billed	Percentile rank
Subhas Banerjee, MD	208	90%
Samer Eldika, MD	114	69%
Sundeep Singh, MD	108	67%
Kian Keyashian, MD	91	60%
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%
Aarti Rao, MD	53	40%
Robert Huang, MD	51	39%
Shai Friedland, MD	43	34%
Patricia Garcia, MD	42	33%
Walter Park, MD	41	32%
Monique Barakat, MD	35	28%
Afrin Kamal, MD	34	28%
Nielsen Fernandez-Becker, MD	33	27%
Leila Neshatian, MD	33	27%
Sarah Streett, MD	26	23%
Edith Ho, MD	25	22%
Sidhartha Sinha, MD	22	20%
Tahereh Ghaziani, 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
Nakia Chung, MD	1-10	13% or below
Tami Daugherty, MD	1-10	13% or below
Deepti Dronamraju, MD	1-10	13% or below
Amit Kamboj, MD	1-10	13% or below
Paul Kwo, MD	1-10	13% or below
Allison Kwong, MD	1-10	13% or below
Lei Yuan Lim, MD	1-10	13% or below
Stephen Nguyen, MD	1-10	13% or below
Jeffrey Wei, 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.

Henry Chun, MD Last reported August 18, 2026
Vivian Ng, 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).