Colonoscopy clinicians in La Jolla, California

CMS lists 41 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 La Jolla, California (details below).

Colonoscopy volume

Clinician	Colonoscopies billed	Percentile rank
Edward Paredez, MD	246	93%
Sajiv Chandradas, MD	214	90%
Wilson Kwong, MD	206	89%
Walter Coyle, MD	191	87%
Andrew Mayer, MD	177	85%
Karen Simon, MD	167	84%
John Chang	166	83%
Matthew Skinner, MD	166	83%
Waleed Shindy, MD	147	79%
Syed Fehmi, MD	145	79%
John Kuldau, MD	143	78%
Behnam Moein Jahromi, MD	137	76%
Gordon Kim, MD	127	73%
John Kasher, MD	115	69%
Sushrut Sujan Thiruvengadam, MD	114	69%
Douglas Hunt, MD	113	69%
Frank Mayer, MD	108	67%
Franklin Tsai, MD	107	67%
Ahmad Mansour, MD	99	64%
Ali Fakhreddine, MD	90	60%
Derek Patel, MD	88	59%
Fouad Moawad, MD	87	58%
Faizi Hai, MD	84	57%
John Zeroogian, MD	81	55%
Nedret Copur, MD	78	54%
Gauree Konijeti, MD	66	48%
Gobind Anand, MD	58	44%
Lisa Hertz, MD	50	39%
Mark Kowalczyk, MD	43	34%
Preetika Sinh, MD	39	32%
Jill Lane, MD	37	31%
Han Zhang, MD	37	31%
Paul Pockros, MD	36	30%
Raymond Lee, MD	20	19%
Quan Nhu, MD	20	19%
Joseph Cheatham, MD	17	17%
Selena Kuo, MD	17	17%
Joy-Marie Hermes, MD	15	16%
Irine Vodkin, MD	11	13%
Julio Gutierrez, MD	1-10	13% or below
Ravinder Mittal, 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).