Colonoscopy clinicians in San Diego, California

CMS lists 116 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 San Diego, California (details below).

Colonoscopy volume

Clinician	Colonoscopies billed	Percentile rank
Daniel Lee, MD	268	94%
Ali Banaie, MD	267	94%
Mohammed Saadi, MD	249	93%
Cainan Foltz, MD	243	93%
William Chen, MD	224	91%
Reza Khoshini, MD	220	91%
Sajiv Chandradas, MD	214	90%
Meng Hua, MD	210	90%
Arthur Yan, MD	194	88%
Hyun Kim, MD	186	87%
Cynthia Schaeffer, MD	170	84%
Nader Mirhoseni, MD	168	84%
John Chang	166	83%
Luis Chavez, MD	166	83%
Husam Elsheikh, MD	165	83%
Suja Dubois, MD	159	82%
Andrew Cummins, MD	152	80%
Ahmed Deabes, MD	149	80%
Sally Stipho, MD	149	80%
Sergio Flores, MD	148	80%
Syed Fehmi, MD	145	79%
Alexander Shpaner, MD	145	79%
Carlton Thomas, MD	136	76%
Simon Ritchken, MD	132	75%
Michael Docherty, MD	126	73%
Patrick Sweet, MD	123	72%
Ananthram Reddy, MD	119	71%
Richard Nodurft, MD	116	70%
Habib Rahman, MD	115	69%
Douglas Hunt, MD	113	69%
Ki-Yoon Kim, MD	113	69%
Chiara Maruggi, MD	111	68%
Alissa Speziale, MD	107	67%
Franklin Tsai, MD	107	67%
Joshua Steichen, MD	106	66%
Fady Youssef, MD	101	64%
Jose Antonio Almario, MD	97	63%
Taddese Desta, MD	96	62%
Emily Singh, MD	95	62%
Darren Keller, MD	94	62%
Derek Patel, MD	88	59%
Michael Chang, MD	87	58%
William Minteer, MD	86	58%
Joseph Reddy, MD	85	57%
Faizi Hai, MD	84	57%
Andrew Su, MD	80	55%
Tommy Yen, MD	79	54%
Nedret Copur, MD	78	54%
Brigid Boland, MD	77	54%
Nanae Takatori, MD	76	53%
David Kunkel, MD	74	52%
Thuy Anh Le, MD	74	52%
Shailja Shah, MD	74	52%
Errol Korn, MD	73	51%
John Lyons, MD	67	48%
Joshua Penfield, MD	66	48%
Matthew Tsai, MD	64	47%
Kristina Seeger, MD	63	46%
Sathish Subramanian, MD	62	46%
Joshua Rubin, MD	61	45%
Thomas Savides, MD	60	45%
Gobind Anand, MD	58	44%
Mark Kowalczyk, MD	43	34%
James Wolosin, MD	41	33%
Susan Chu, MD	39	32%
Denise Kalmaz, MD	39	32%
Tuan Nguyen, MD	37	31%
David Weinman, MD	33	28%
Eric Low	25	23%
Rena Yadlapati, MD	25	23%
Vijayalak Pratha, MD	22	21%
Monica Tincopa, MD	22	21%
Mohammad Phillip Fejleh, MD	19	19%
Erin Song	18	18%
Bhargavbhai Patel, MD	13	15%
Veeral Ajmera, MD	12	14%
Mary Krinsky, DO	12	14%
Alexander Yang, MD	12	14%
Payam Afshar, MD	11	13%
Irine Vodkin, MD	11	13%
Pranab Barman, MD	1-10	13% or below
Jaime Chen, MD	1-10	13% or below
Chan Chung, MD	1-10	13% or below
Shravan Dave, MD	1-10	13% or below
Albert Ding, MD	1-10	13% or below
Lynne Do, MD	1-10	13% or below
Mamie Dong, MD	1-10	13% or below
Robert Elliott, DO	1-10	13% or below
Daryl Fick, MD	1-10	13% or below
Benjamin Fiore, MD	1-10	13% or below
Brian First, MD	1-10	13% or below
Donald Goens, MD	1-10	13% or below
Jasleen Grewal, MD	1-10	13% or below
Samir Gupta, MD	1-10	13% or below
Gordon Hunt, MD	1-10	13% or below
Jennifer Kimble, MD	1-10	13% or below
Brian King, MD	1-10	13% or below
Philip Kozan, MD	1-10	13% or below
Joy Lee, MD	1-10	13% or below
Ashley Manganiello, MD	1-10	13% or below
Sonali Master, MD	1-10	13% or below
Michael McTigue, MD	1-10	13% or below
Ravinder Mittal, MD	1-10	13% or below
Amirkaveh Mojtahed, MD	1-10	13% or below
Linhkieu Nguyen, MD	1-10	13% or below
Ro Park, MD	1-10	13% or below
Niraj Patel, MD	1-10	13% or below
Nicolas Pulham, MD	1-10	13% or below
Roderick Rapier, MD	1-10	13% or below
Natasha Schneider, MD	1-10	13% or below
Katherine Shaffer, MD	1-10	13% or below
Matthew Sitzer, MD	1-10	13% or below
John Stillson, MD	1-10	13% or below
Tu Truong, MD	1-10	13% or below
Jeffrey Weissman, MD	1-10	13% or below
Carrie Wong, 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).