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Colonoscopy clinicians in San Diego, California

CMS lists 117 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
Ali Banaie, MD 292 96%
Sajiv Chandradas, MD 277 95%
Daniel Lee, MD 271 95%
Mohammed Saadi, MD 257 94%
William Chen, MD 227 92%
Cainan Foltz, MD 226 91%
Arthur Yan, MD 215 90%
Reza Khoshini, MD 202 89%
Hyun Kim, MD 190 87%
Sally Stipho, MD 183 87%
Meng Hua, MD 180 86%
John Chang 179 86%
Syed Fehmi, MD 179 86%
Nader Mirhoseni, MD 179 86%
Suja Dubois, MD 177 85%
Andrew Cummins, MD 158 82%
Cynthia Schaeffer, MD 154 81%
Luis Chavez, MD 149 80%
Ahmed Deabes, MD 149 80%
Husam Elsheikh, MD 146 79%
Sergio Flores, MD 145 79%
Alexander Shpaner, MD 141 78%
Simon Ritchken, MD 140 77%
Carlton Thomas, MD 140 77%
William Minteer, MD 133 75%
Michael Docherty, MD 127 74%
Fady Youssef, MD 123 72%
Douglas Hunt, MD 113 69%
Richard Nodurft, MD 110 68%
Joshua Steichen, MD 110 68%
Habib Rahman, MD 109 67%
Darren Keller, MD 108 67%
Derek Patel, MD 106 66%
Matthew Bender, MD 104 66%
Ananthram Reddy, MD 102 65%
Franklin Tsai, MD 102 65%
Jose Antonio Almario, MD 101 65%
Chiara Maruggi, MD 101 65%
Taddese Desta, MD 100 64%
Andrew Su, MD 97 63%
Alissa Speziale, MD 96 63%
Patrick Sweet, MD 95 62%
Brigid Boland, MD 88 59%
Emily Singh, MD 86 58%
Mark Kowalczyk, MD 84 57%
John Lyons, MD 84 57%
Nanae Takatori, MD 84 57%
Joshua Penfield, MD 83 57%
Faizi Hai, MD 80 55%
Joseph Reddy, MD 79 54%
Thuy Anh Le, MD 77 53%
David Kunkel, MD 76 53%
Shailja Shah, MD 75 52%
Nedret Copur, MD 71 50%
Tommy Yen, MD 71 50%
Michael Chang, MD 70 50%
Errol Korn, MD 69 49%
Joshua Rubin, MD 69 49%
Matthew Tsai, MD 69 49%
Susan Chu, MD 64 46%
Sathish Subramanian, MD 63 46%
Preetika Sinh, MD 62 45%
Ki-Yoon Kim, MD 60 44%
Thomas Savides, MD 60 44%
Kristina Seeger, MD 60 44%
James Wolosin, MD 57 42%
Gobind Anand, MD 56 42%
Michael Lajin, MD 46 36%
Erin Song 44 34%
David Weinman, MD 40 32%
Denise Kalmaz, MD 36 29%
Tuan Nguyen, MD 35 28%
Mohammad Phillip Fejleh, MD 30 25%
Rena Yadlapati, MD 27 23%
Eric Low 25 22%
Vijayalak Pratha, MD 25 22%
Roderick Rapier, MD 23 21%
John Stillson, MD 19 18%
Bhargavbhai Patel, MD 17 17%
Selena Kuo, MD 15 16%
Monica Tincopa, MD 15 16%
Alexander Yang, MD 12 14%
Veeral Ajmera, MD 1-10 13% or below
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
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
Andres Gottfried Blackmore, 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
Mary Krinsky, DO 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
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
Natasha Schneider, MD 1-10 13% or below
Katherine Shaffer, MD 1-10 13% or below
Matthew Sitzer, MD 1-10 13% or below
Irine Vodkin, 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.

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.

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).