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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. Harpriya Singh, MD
Pleasanton, CA · No drug or device payments recorded (2025) · Telehealth · (925) 463-0590
Dr. James Lin, M.D.
Pleasanton, CA · $220 in drug and device payments (2025) · Telehealth · (650) 736-5555
Dr. Phillip Wolfe, M.D.
Pleasanton, CA · $1,924 in drug and device payments (2025) · Telehealth · (925) 460-8167
Dr. Ralph Camacho, MD
Pleasanton, CA · No drug or device payments recorded (2025) · (925) 460-0700
Dr. Andrew Dam, DO
Pomona, CA · $801 in drug and device payments (2025) · (909) 655-0300
Dr. Gerald Goldman, MD
Pomona, CA · No drug or device payments recorded (2025) · (909) 623-8628
Dr. Jason Shin, M. D.
Pomona, CA · $236 in drug and device payments (2025) · Telehealth · (909) 593-2031
Dr. Kenneth Lee, MD
Pomona, CA · $1,862 in drug and device payments (2025) · (909) 622-3800
Dr. Krishan Malhotra, M.D.
Pomona, CA · $623 in drug and device payments (2025) · (909) 629-2290
Dr. Demetrios Stavrakis
Porter Ranch, CA · $105 in drug and device payments (2025) · Telehealth · (818) 271-2400
Dr. Kevork Khadarian, MD
Porter Ranch, CA · No drug or device payments recorded (2025) · Telehealth · (818) 271-2400
Dr. Ahmed Rashed, M.D.
Porterville, CA · No drug or device payments recorded (2025) · (559) 781-4500
Dr. Sohrab Naini, MD
Porterville, CA · $42 in drug and device payments (2025) · (559) 615-0059
Dr. John Selling, MD
Portola Valley, CA · No drug or device payments recorded (2025) · (650) 743-0932
Dr. Alan Larson, MD
Poway, CA · No drug or device payments recorded (2025) · (858) 487-2121
Dr. Andrea Tieng, M.D.
Rancho Cucamonga, CA · $134 in drug and device payments (2025) · (909) 255-7200
Dr. Arwa Zakaria, DO
Rancho Cucamonga, CA · $1,042 in drug and device payments (2025) · (909) 655-0300
Dr. Bhavesh Patel, M.D.
Rancho Cucamonga, CA · $1,730 in drug and device payments (2025) · (909) 655-0300
Dr. Deborah Anghesom-negusse, MD
Rancho Cucamonga, CA · $275 in drug and device payments (2025) · Telehealth · (909) 360-1111
Dr. Hussein Abidali, DO
Rancho Cucamonga, CA · $2,066 in drug and device payments (2025) · (909) 655-0300
Dr. Muhammad Hammami, M.D.
Rancho Cucamonga, CA · $343 in drug and device payments (2025) · Telehealth · (909) 606-4860
Dr. Adewale Ajumobi, M.D.
Rancho Mirage, CA · No drug or device payments recorded (2025) · Telehealth · (760) 773-2882
Dr. Alan Altman, M.D.
Rancho Mirage, CA · No drug or device payments recorded (2025) · (760) 770-6065
Dr. Anh Duong, M.D.
Rancho Mirage, CA · $1,340 in drug and device payments (2025) · Telehealth · (760) 321-2500
Dr. Anthony Tornay, M.D.
Rancho Mirage, CA · No drug or device payments recorded (2025) · (760) 776-4280
Dr. Badri Nath, MD
Rancho Mirage, CA · No drug or device payments recorded (2025) · (760) 773-2882
Dr. Gary Annunziata, D.O.
Rancho Mirage, CA · $1,754 in drug and device payments (2025) · Telehealth · (760) 321-2500
Dr. James Conti, M.D.
Rancho Mirage, CA · $158 in drug and device payments (2025) · Telehealth · (760) 773-2882
Dr. Mamta Mehta, M.D., M.P.H
Rancho Mirage, CA · $143 in drug and device payments (2025) · Telehealth · (760) 773-2882
Dr. Noel Curry, M.D.
Rancho Mirage, CA · No drug or device payments recorded (2025) · (760) 773-2882
Dr. Ronald Heilpern, MD
Rancho Mirage, CA · No drug or device payments recorded (2025) · (760) 773-9750
Dr. Sarah Maher, M.D.
Rancho Mirage, CA · $279 in drug and device payments (2025) · Telehealth · (760) 773-2882
Dr. Ulysses Rosas, MD
Rancho Mirage, CA · No drug or device payments recorded (2025) · Telehealth · (760) 773-2882
Dr. Vikram Kanagala, M.D
Rancho Mirage, CA · $168 in drug and device payments (2025) · Telehealth · (760) 773-2882
Dr. Yash Mittal, M.D.
Rancho Mirage, CA · $279 in drug and device payments (2025) · Telehealth · (760) 773-2882
Dr. Joseph Weiss, M.D.
Rancho Santa Fe, CA · No drug or device payments recorded (2025) · (858) 756-9800
Dr. Akeel Halai, M.D.
Redding, CA · No drug or device payments recorded (2025) · (530) 224-1876
Dr. Bret Namihas, M.D.
Redding, CA · $180 in drug and device payments (2025) · (530) 243-8667
Dr. Gaddam Reddy, MD
Redding, CA · $165 in drug and device payments (2025) · (530) 243-8667
Dr. Hongguang Liu, M.D.
Redding, CA · $894 in drug and device payments (2025) · Telehealth · (530) 338-2406
Dr. Leo Eickhoff, M.D.
Redding, CA · $540 in drug and device payments (2025) · (530) 243-8667
Dr. Paramvir Singh, M.D.
Redding, CA · $240 in drug and device payments (2025) · (530) 243-1166
Dr. Paul Spinka, MD
Redding, CA · $133 in drug and device payments (2025) · (530) 244-0654
Dr. Piyush Dhanuka, M.D.
Redding, CA · $1,024 in drug and device payments (2025) · Telehealth · (530) 243-8667
Dr. Prathibha Chandrasekaran, M.D.
Redding, CA · $304 in drug and device payments (2025) · Telehealth · (530) 243-8667
Dr. Albert Chang, MD
Redlands, CA · $369 in drug and device payments (2025) · (909) 796-0363
Dr. Bradley Collins, PA-C
Redlands, CA · No drug or device payments recorded (2025) · (909) 793-1399
Dr. Carol Murakami, MD
Redlands, CA · No drug or device payments recorded (2025) · (424) 338-0225
Dr. Gary Wernick, MD
Redlands, CA · No drug or device payments recorded (2025) · (909) 796-7803
Dr. George Saffouri, MD
Redlands, CA · $4,210 in drug and device payments (2025) · (909) 644-4063

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.

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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.