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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. Isaac Bartley, M.D.
Glendale, CA · No drug or device payments recorded (2025) · Telehealth · (818) 956-7507
Dr. James Tabibian, M.D.
Glendale, CA · $1,871 in drug and device payments (2025) · Telehealth · (818) 630-8653
Dr. Mehdi Khorsandi, M.D.
Glendale, CA · $1,646 in drug and device payments (2025) · (818) 500-1676
Dr. Michael Klein, MD
Glendale, CA · $23 in drug and device payments (2025) · (818) 952-5332
Dr. Michael Mello, MD
Glendale, CA · $50 in drug and device payments (2025) · Telehealth · (818) 790-0122
Dr. Rimma Shaposhnikov, M.D.
Glendale, CA · No drug or device payments recorded (2025) · Telehealth · (818) 637-2000
Dr. Vincente Villa, M.D.
Glendale, CA · No drug or device payments recorded (2025) · (818) 254-1500
Dr. W. Mello, M.D.
Glendale, CA · $13 in drug and device payments (2025) · Telehealth · (818) 790-0122
Dr. Zaree Babakhanian, M.D.
Glendale, CA · $734 in drug and device payments (2025) · Telehealth · (818) 790-5914
Dr. Adam Snyder, M.D.
Glendora, CA · $2,150 in drug and device payments (2025) · Telehealth · (626) 610-2112
Dr. George Ferenczi, M.D.
Glendora, CA · $533 in drug and device payments (2025) · (626) 914-1182
Dr. Daniel Luba, M.D.
Gonzales, CA · $221 in drug and device payments (2025) · Telehealth · (831) 675-3601
Dr. Ali Azarm, M.D.
Granite Bay, CA · $119 in drug and device payments (2025) · (718) 986-2316
Dr. Sanford Selcon
Granite Bay, CA · No drug or device payments recorded (2025) · (916) 791-2895
Dr. Benjamin Brichler, M.D.
Grass Valley, CA · $24 in drug and device payments (2025) · (530) 273-3377
Dr. Kevin Hill, DO
Grass Valley, CA · $17 in drug and device payments (2025) · (530) 273-3377
Dr. Richard Roehrkasse, MD
Grass Valley, CA · No drug or device payments recorded (2025) · (530) 272-6218
Dr. Roy Foliente, M.D.
Grass Valley, CA · $206 in drug and device payments (2025) · (530) 273-3377
Dr. Albert Varner, MD
Greenbrae, CA · No drug or device payments recorded (2025) · (415) 925-6900
Dr. Christopher Hogan, M.D.
Greenbrae, CA · $1,068 in drug and device payments (2025) · Telehealth · (415) 925-6900
Dr. Danny Kao, MD
Greenbrae, CA · No drug or device payments recorded (2025) · (415) 925-6900
Dr. David Bloom, MD
Greenbrae, CA · No drug or device payments recorded (2025) · (415) 925-6900
Dr. John Bettinger, M.D.
Greenbrae, CA · No drug or device payments recorded (2025) · (415) 925-6900
Dr. Natalie Lee, MD
Greenbrae, CA · $514 in drug and device payments (2025) · Telehealth · (415) 925-6900
Dr. Richard Mcauliffe, MD
Greenbrae, CA · No drug or device payments recorded (2025) · (415) 925-6900
Dr. Vikram Malladi, MD
Greenbrae, CA · $809 in drug and device payments (2025) · Telehealth · (415) 925-6900
Dr. Christina Chen, M.D., PH.D.
Hacienda Heights, CA · $14 in drug and device payments (2025) · (626) 810-5601
Dr. Kenny Su, M.D.
Hacienda Heights, CA · No drug or device payments recorded (2025) · (626) 855-1091
Dr. Sam Kam, M.D., PH.D.
Hacienda Heights, CA · No drug or device payments recorded (2025) · (626) 810-5601
Dr. Shang Wu, M.D.
Hacienda Heights, CA · $25,287 in drug and device payments (2025) · (626) 937-6663
Dr. Mark Li, M.D.
Hacienda Hts, CA · $1,238 in drug and device payments (2025) · (626) 330-6003
Dr. Alvin Au, MD FACG
Hanford, CA · $2,824 in drug and device payments (2025) · (559) 584-6499
Dr. Boris Reznik, M.D.
Hanford, CA · $519 in drug and device payments (2025) · (559) 589-9460
Dr. Mahum Nadeem
Hanford, CA · $116 in drug and device payments (2025) · Telehealth · (155) 958-2900
Dr. Avanish Patel, MD
Harbor City, CA · $277 in drug and device payments (2025) · (310) 325-5111
Dr. Bich-thuy Nguyen, MD
Harbor City, CA · No drug or device payments recorded (2025) · (310) 325-5111
Dr. Derek Fong, MD
Harbor City, CA · No drug or device payments recorded (2025) · (800) 780-1230
Dr. Gregory Harmon, M.D.
Harbor City, CA · No drug or device payments recorded (2025) · (310) 325-5111
Dr. Harjot Gill, M.D.
Harbor City, CA · $371 in drug and device payments (2025) · (310) 325-5111
Dr. Kapil Mehta, MD
Harbor City, CA · $633 in drug and device payments (2025) · (310) 325-5111
Dr. Peter Sender, MD
Harbor City, CA · No drug or device payments recorded (2025) · (310) 325-5111
Dr. Trien Bui, MD
Harbor City, CA · $76 in drug and device payments (2025) · (310) 325-5111
Dr. Ajeet Singhvi, M.D.
Hemet, CA · $50 in drug and device payments (2025) · Telehealth · (951) 929-0125
Dr. Mai-ching Chien, M.D.
Hemet, CA · No drug or device payments recorded (2025) · (951) 766-1954
Dr. Milan Chakrabarty, M.D.
Hemet, CA · $1,680 in drug and device payments (2025) · (951) 652-2252
Dr. Tahir Qaseem, MD
Hemet, CA · $1,319 in drug and device payments (2025) · (951) 652-2252
Dr. Hin Wah Lee, M.D.
Highland, CA · $360 in drug and device payments (2025) · (909) 862-1191
Dr. Lida Zhen, M.D.
Highland, CA · $369 in drug and device payments (2025) · (909) 862-1191
Dr. Mark Gabriel, D.O.
Highland, CA · $685 in drug and device payments (2025) · (909) 862-1191
Dr. Richard Strong, M.D.
Highland, CA · No drug or device payments recorded (2025) · (909) 862-1191

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.