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Gastroenterologists in California

Data updated monthly · Last refresh October 2026

2,135 Gastroenterology providers practice in California, including 918 (43%) offering telehealth. The largest concentration is in Los Angeles. Profiles include federal Open Payments records of money received from drug and device companies in 2025. Listings are drawn from federal public records and are not endorsements.

2,135providers
918telehealth
Los Angelestop city

Gastroenterology by city in California

Choose a city to see providers there.

Gastroenterology in Los Angeles195 providers
Gastroenterology in San Diego126 providers
Gastroenterology in San Francisco103 providers
Gastroenterology in Sacramento89 providers
Gastroenterology in Stanford63 providers
Gastroenterology in San Jose46 providers
Gastroenterology in Orange45 providers
Gastroenterology in Torrance44 providers
Gastroenterology in Fresno41 providers
Gastroenterology in La Jolla36 providers
Gastroenterology in Loma Linda33 providers
Gastroenterology in Walnut Creek33 providers
Gastroenterology in Palo Alto29 providers
Gastroenterology in Oakland27 providers
Gastroenterology in Fremont26 providers
Gastroenterology in Santa Monica26 providers
Gastroenterology in West Hollywood26 providers
Gastroenterology in Anaheim25 providers
Gastroenterology in Newport Beach23 providers
Gastroenterology in Beverly Hills23 providers
Gastroenterology in Riverside22 providers
Gastroenterology in Irvine22 providers
Gastroenterology in Modesto21 providers
Gastroenterology in Santa Rosa19 providers

Gastroenterology providers in California

Listed by city, largest first. Payment figures come from the federal Open Payments program, which requires drug and device companies to report what they pay physicians for consulting, speaking, meals, travel and royalties. A disclosed payment is a financial relationship, not evidence of wrongdoing, and many totals reflect a single meal. Figures cover calendar year 2025.

Dr. Thomas Cuff, MD
Vallejo, CA · No drug or device payments recorded (2025) · (707) 651-1000
Dr. Efrat Lobel, MD
Van Nuys, CA · No drug or device payments recorded (2025) · (818) 989-0041
Dr. Gnana Desigan, MD
Van Nuys, CA · No drug or device payments recorded (2025) · (818) 782-3116
Dr. Michael Yadegari, M.D
Van Nuys, CA · $57 in drug and device payments (2025) · Telehealth · (818) 779-0555
Dr. Nagaraj Chetty, MD
Van Nuys, CA · No drug or device payments recorded (2025) · (818) 997-0422
Dr. Benito Pedraza
Ventura, CA · $382 in drug and device payments (2025) · Telehealth · (805) 641-6525
Dr. Bruce Greenwald, M.D.
Ventura, CA · No drug or device payments recorded (2025) · (805) 477-6464
Dr. Charles Menz, MD
Ventura, CA · $145 in drug and device payments (2025) · (805) 641-6525
Dr. Dipti Sagar, MD
Ventura, CA · No drug or device payments recorded (2025) · (805) 652-6222
Dr. Kip Lyche, MD
Ventura, CA · $241 in drug and device payments (2025) · Telehealth · (805) 641-6525
Dr. Natasha Narang, DO
Ventura, CA · No drug or device payments recorded (2025) · Telehealth · (805) 652-6222
Dr. Sabine Hazan, MD
Ventura, CA · No drug or device payments recorded (2025) · (805) 339-0549
Dr. Stephen Covington, MD
Ventura, CA · No drug or device payments recorded (2025) · (805) 641-6525
Dr. Arnab Biswas, D.O.
Victorville, CA · $404 in drug and device payments (2025) · (760) 881-3377
Dr. Henry Lin, M.D.
Victorville, CA · $23 in drug and device payments (2025) · (760) 268-2063
Dr. Nikhil Gupta, M.D.
Victorville, CA · $567 in drug and device payments (2025) · (760) 881-3377
Dr. Richard Huang, MD
Victorville, CA · $1,782 in drug and device payments (2025) · (760) 881-3377
Dr. Thomas Thong Nguyen, M.D.,
Victorville, CA · $1,478 in drug and device payments (2025) · Telehealth · (760) 881-3377
Dr. Bankim Dalal, MD
Visalia, CA · No drug or device payments recorded (2025) · (559) 635-2262
Dr. Neshan Tabibian, M.D.
Visalia, CA · No drug or device payments recorded (2025) · (559) 738-7500
Dr. Shirley Pua, M.D.
Visalia, CA · $521 in drug and device payments (2025) · (559) 738-7532
Dr. William Hsueh, M.D.
Visalia, CA · $575 in drug and device payments (2025) · (559) 738-7532
Dr. Rafael Cuellar, M.D.
Vista, CA · No drug or device payments recorded (2025) · (760) 599-1222
Dr. Christine Shieh, MD
Walnut Creek, CA · $305 in drug and device payments (2025) · (925) 296-7340
Dr. Cynthia Mullen, M.D.
Walnut Creek, CA · $684 in drug and device payments (2025) · Telehealth · (925) 322-2372
Dr. Daniel Chung, MD
Walnut Creek, CA · $19 in drug and device payments (2025) · (925) 295-4000
Dr. Daniel Yu, MD
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 295-4000
Dr. David Lin, M.D.
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 831-9200
Dr. Drew Schembre, MD
Walnut Creek, CA · $56,604 in drug and device payments (2025) · Telehealth · (925) 296-7340
Dr. Erin Wolf, MD
Walnut Creek, CA · $249 in drug and device payments (2025) · (925) 296-7340
Dr. Eugene Chan, MD
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 295-4000
Dr. Gerald Tarder, M.D.
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 938-6060
Dr. Henry Kung, M.D.
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 945-6070
Dr. Hongha Vu James, M.D.
Walnut Creek, CA · $294 in drug and device payments (2025) · (925) 296-7340
Dr. Kanwar Gill, M.D.
Walnut Creek, CA · $56,655 in drug and device payments (2025) · Telehealth · (925) 296-7340
Dr. Katharine Ozeki, M.D.
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 295-4080
Dr. Maher Tama, M.D.
Walnut Creek, CA · $20 in drug and device payments (2025) · (925) 296-7340
Dr. Martha Turchyn-mazuryk, MD
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 295-4000
Dr. Matthew Chin, M.D.
Walnut Creek, CA · $142 in drug and device payments (2025) · Telehealth · (925) 296-7340
Dr. Mervyn Becker, MD
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 708-4419
Dr. Ming Fang, MD
Walnut Creek, CA · $823 in drug and device payments (2025) · Telehealth · (925) 776-7600
Dr. Oliver Lin, M.D.
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 295-4080
Dr. Omar Al-shuwaykh, M.D
Walnut Creek, CA · $974 in drug and device payments (2025) · Telehealth · (925) 295-5758
Dr. Rishi Sharma, M.D.
Walnut Creek, CA · $1,155 in drug and device payments (2025) · Telehealth · (925) 932-6330
Dr. Rohit Anand, MD
Walnut Creek, CA · $828 in drug and device payments (2025) · Telehealth · (925) 296-7340
Dr. Sam Saeed Zamani, M.D.
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 939-5599
Dr. Shireen Ghorbani, M.D.
Walnut Creek, CA · $409 in drug and device payments (2025) · (925) 488-9006
Dr. Steve Cheng, MD
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 939-5599
Dr. Steven Fredman, MD
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 295-4000
Dr. Suyi Chang, MD
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 295-4000

Conditions Gastroenterology providers in California commonly treat

Patients often search by condition rather than specialty. These are conditions typically managed by Gastroenterology providers. Individual practices vary, so confirm with the provider before booking.

Common questions

How many Gastroenterology providers are in California?

There are 2,135 Gastroenterology providers with active NPI records practicing in California, according to federal NPPES data refreshed monthly.

Do Gastroenterology providers in California offer telehealth?

Yes. 918 of the 2,135 Gastroenterology providers in California (about 43%) report offering telehealth services in CMS data.

Which cities in California have the most Gastroenterology providers?

Los Angeles (195), San Diego (126), San Francisco (103) have the highest concentration of Gastroenterology providers in California.

How many Gastroenterology providers in California received drug or device company payments?

1,329 of 2,135 Gastroenterology providers in California (62%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.

What conditions do Gastroenterology providers in California treat?

Gastroenterology providers commonly treat acid reflux, IBS, Crohn disease, ulcerative colitis, celiac disease and related conditions. Individual practices vary, so confirm with the provider before booking.

Where does this data come from?

Provider counts and profiles come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.

Do most Gastroenterologists in California work in independent practices or large health systems?

Among 1,498 Gastroenterologists in California enrolled in Medicare, 21% bill through a solo or small practice with fewer than 10 clinicians, 8% through a mid-size group of 10 to 99, and 71% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.

Which hospitals do Gastroenterologists in California work at?

According to CMS facility affiliation records, the California hospitals where the most Gastroenterologists hold privileges are Stanford Health Care in Stanford; Ronald Reagan UCLA Medical Center in Los Angeles; Cedars-Sinai Medical Center in Los Angeles.

Related reading on HealthcareDiscovery.AI

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Sources: NPPES (CMS), Doctors and Clinicians national files, CMS Open Payments 2025. Updated monthly. Records are public federal data and are not verified credentials, licensure checks, or endorsements. This directory is informational and not medical advice. How we build this directory. Are you a Gastroenterology in California? Get featured.