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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. Lizhou Huang, M.D.
Fountain Valley, CA · $435 in drug and device payments (2025) · Telehealth · (657) 241-9090
Dr. Nancy Han, M.D.
Fountain Valley, CA · $405 in drug and device payments (2025) · Telehealth · (657) 241-9090
Dr. Richard Zelner
Fountain Valley, CA · No drug or device payments recorded (2025) · (657) 241-9090
Dr. Ronald Policastro, M.D.
Fountain Valley, CA · No drug or device payments recorded (2025) · (714) 962-7705
Dr. Vincent Kao, DO
Fountain Valley, CA · $741 in drug and device payments (2025) · Telehealth · (657) 241-9090
Dr. Christopher Orpiano, D.O.
Fowler, CA · $32 in drug and device payments (2025) · (559) 834-1614
Dr. Albert Crevello, MD
Freedom, CA · No drug or device payments recorded (2025) · (831) 722-8807
Dr. Frederick Chen, MD
Freedom, CA · No drug or device payments recorded (2025) · (831) 728-1410
Dr. Ronald Waloff, MD
Freedom, CA · $1,065 in drug and device payments (2025) · Telehealth · (831) 722-8807
Dr. Andrew Lu, M.D.
Fremont, CA · $80 in drug and device payments (2025) · (510) 248-3000
Dr. Anmol Mahal, M.D.
Fremont, CA · No drug or device payments recorded (2025) · Telehealth · (510) 794-1990
Dr. Annamalai Veerappan, M.D.
Fremont, CA · $92 in drug and device payments (2025) · Telehealth · (510) 793-3722
Dr. Arun Srivatsa, MD
Fremont, CA · $27 in drug and device payments (2025) · Telehealth · (510) 248-1550
Dr. Chuqiao Dong
Fremont, CA · $150 in drug and device payments (2025) · (510) 498-2395
Dr. Claribel Taylor, M.D.
Fremont, CA · $105 in drug and device payments (2025) · Telehealth · (510) 498-2395
Dr. Emily Lin
Fremont, CA · $45 in drug and device payments (2025) · (510) 248-3000
Dr. Gayatri Bharadhwaj, MD
Fremont, CA · No drug or device payments recorded (2025) · Telehealth · (510) 795-3000
Dr. Jean-luc Szpakowski, MD
Fremont, CA · No drug or device payments recorded (2025) · (510) 795-3000
Dr. Jed Weissberg, MD
Fremont, CA · No drug or device payments recorded (2025) · (510) 271-6847
Dr. Kenneth Kelsen, MD
Fremont, CA · $1,350 in drug and device payments (2025) · (510) 793-3033
Dr. Kirk Lin
Fremont, CA · $231 in drug and device payments (2025) · Telehealth · (510) 490-1222
Dr. Luke Bi, MD
Fremont, CA · $401 in drug and device payments (2025) · Telehealth · (510) 490-1222
Dr. Mai Dao, MD
Fremont, CA · $144 in drug and device payments (2025) · Telehealth · (510) 498-2395
Dr. Mary Hu, M.D.
Fremont, CA · $105 in drug and device payments (2025) · Telehealth · (510) 490-1222
Dr. Nutan Chadha, M.D.
Fremont, CA · No drug or device payments recorded (2025) · (510) 683-9127
Dr. Prashant Kotwani
Fremont, CA · $105 in drug and device payments (2025) · Telehealth · (510) 498-2395
Dr. Rachel Feder
Fremont, CA · $105 in drug and device payments (2025) · Telehealth · (510) 498-2395
Dr. Ritesh Jha, M.D.
Fremont, CA · $105 in drug and device payments (2025) · Telehealth · (510) 490-1222
Dr. Saurabh Sethi, M.D.
Fremont, CA · $60,377 in drug and device payments (2025) · Telehealth · (510) 796-3400
Dr. Shakir Hyder, M.D.
Fremont, CA · $508 in drug and device payments (2025) · Telehealth · (510) 796-0222
Dr. Stanley Yu, MD
Fremont, CA · $105 in drug and device payments (2025) · Telehealth · (510) 490-1222
Dr. Sukhwinder Sandhu, MD
Fremont, CA · $343 in drug and device payments (2025) · (510) 793-3033
Dr. Yagya Kapila, MD
Fremont, CA · No drug or device payments recorded (2025) · (510) 470-4944
Dr. Yu-ming Chang, M.D., PH.D.
Fremont, CA · No drug or device payments recorded (2025) · (408) 646-4176
Dr. Zaid Imam, MD
Fremont, CA · No drug or device payments recorded (2025) · Telehealth · (510) 248-1843
Dr. Richard Landres, M.D.
French Camp, CA · No drug or device payments recorded (2025) · (209) 468-6000
Dr. Sarathy Mandayam, MD
French Camp, CA · $21 in drug and device payments (2025) · (661) 945-8700
Dr. W Bresnahan, MD
French Camp, CA · No drug or device payments recorded (2025) · (209) 468-6000
Dr. Abdul Sheikh, MD
Fresno, CA · $21 in drug and device payments (2025) · (559) 448-4500
Dr. Adam Greenberg, M.D.
Fresno, CA · $1,722 in drug and device payments (2025) · (559) 323-8200
Dr. Amitpaul Gill
Fresno, CA · $1,929 in drug and device payments (2025) · (559) 323-8200
Dr. Amreet Aujla, M.D.
Fresno, CA · $1,111 in drug and device payments (2025) · Telehealth · (559) 440-0450
Dr. Bruce Sahba, M.D.
Fresno, CA · $85 in drug and device payments (2025) · (559) 459-5721
Dr. Charles Farr, M.D.
Fresno, CA · No drug or device payments recorded (2025) · (559) 435-1750
Dr. Devang Prajapati
Fresno, CA · No drug or device payments recorded (2025) · (559) 459-3821
Dr. Donald Knapp, M.D.
Fresno, CA · No drug or device payments recorded (2025) · (559) 431-4666
Dr. Gurjiwan Virk, M.D
Fresno, CA · $1,900 in drug and device payments (2025) · (559) 438-8400
Dr. Helen Wong, M.D.
Fresno, CA · No drug or device payments recorded (2025) · (559) 459-4346
Dr. Heng Nhoung, MD
Fresno, CA · $14 in drug and device payments (2025) · (559) 499-6550
Dr. Jacob Colarian, MD
Fresno, CA · $17 in drug and device payments (2025) · (559) 448-4500

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.