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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. Kendall Beck
San Francisco, CA · $29 in drug and device payments (2025) · Telehealth · (415) 476-1528
Dr. Kenneth Binmoeller, MD
San Francisco, CA · $42,225 in drug and device payments (2025) · (415) 600-1151
Dr. Kenneth Hammerman, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 673-7600
Dr. Kenneth Mcquaid, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 221-4810
Dr. Kevin Ng-tang, PA-C
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (510) 386-3177
Dr. Lakshmipriya Subbaraj
San Francisco, CA · $144 in drug and device payments (2025) · (415) 476-1000
Dr. Laura Chiu, MD, MPH
San Francisco, CA · $61 in drug and device payments (2025) · Telehealth · (415) 476-1000
Dr. Lukejohn Day, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 377-2176
Dr. Lyle Shlager, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 833-2000
Dr. Madeleine Hu
San Francisco, CA · $145 in drug and device payments (2025) · (415) 476-1529
Dr. Mandana Khalili, MD
San Francisco, CA · $11,800 in drug and device payments (2025) · (415) 206-8822
Dr. Maneesh Singh, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-3143
Dr. Marcia Leung, MD
San Francisco, CA · $420 in drug and device payments (2025) · Telehealth · (415) 833-3514
Dr. Martin Spitz, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 540-1027
Dr. Mary Elizabeth Clark, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 644-5752
Dr. Ma Somsouk, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 206-8823
Dr. Michael Li
San Francisco, CA · $154 in drug and device payments (2025) · Telehealth · (628) 206-8823
Dr. Michael Verhille, M.D.
San Francisco, CA · $780 in drug and device payments (2025) · (415) 387-8800
Dr. Michele Tana, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 730-9086
Dr. Mimi Lin, M.D.
San Francisco, CA · $3,943 in drug and device payments (2025) · Telehealth · (415) 600-1000
Dr. Nikhil Agarwal, M.D.
San Francisco, CA · $779 in drug and device payments (2025) · Telehealth · (415) 600-3458
Dr. Patrick Avila
San Francisco, CA · $407 in drug and device payments (2025) · Telehealth · (628) 206-8823
Dr. Priya Kathpalia, M.D.
San Francisco, CA · $3,894 in drug and device payments (2025) · Telehealth · (415) 502-4444
Dr. Rena Mei, MD
San Francisco, CA · $192 in drug and device payments (2025) · (628) 206-8823
Dr. Richard Frederick, M.D.
San Francisco, CA · $45,689 in drug and device payments (2025) · Telehealth · (415) 600-1000
Dr. Richard Sundberg, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 387-8800
Dr. Robert Elsen, M.D.
San Francisco, CA · $878 in drug and device payments (2025) · Telehealth · (415) 469-0643
Dr. Robert Owen, M.D.
San Francisco, CA · $125 in drug and device payments (2025) · (415) 750-2101
Dr. Rohit Khanna, DO
San Francisco, CA · $1,113 in drug and device payments (2025) · (415) 476-3143
Dr. Ruzbeh Mosadeghi
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 502-4444
Dr. Shreya Patel
San Francisco, CA · No drug or device payments recorded (2025) · (628) 206-8823
Dr. Silvia Teixeira Vilarinho, M.D., PH.D.
San Francisco, CA · $13,637 in drug and device payments (2025) · (628) 206-8823
Dr. Stanley Goldberg, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 206-8822
Dr. Stephanie Maldonado, MD, SCM
San Francisco, CA · $144 in drug and device payments (2025) · (415) 476-1529
Dr. Steven Jacobsohn, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 502-4444
Dr. Steven White, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 370-6120
Dr. Sun-chuan Dai, MD
San Francisco, CA · $4,493 in drug and device payments (2025) · Telehealth · (628) 206-8000
Dr. Tarun Rustagi, M.D.
San Francisco, CA · $182 in drug and device payments (2025) · (415) 600-1000
Dr. Thomas Haddad, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 771-4366
Dr. Thomas Myint, M.D
San Francisco, CA · $119 in drug and device payments (2025) · (415) 387-8800
Dr. Thomas Twaddell, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 206-9293
Dr. Timothy Chen, M.D.
San Francisco, CA · $2,605 in drug and device payments (2025) · Telehealth · (415) 387-8800
Dr. Timothy Lu, M.D., PH.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-3143
Dr. Uma Mahadevan, MD
San Francisco, CA · $108,932 in drug and device payments (2025) · Telehealth · (415) 502-4444
Dr. Vivek Rudrapatna, M.D., PH.D.
San Francisco, CA · $135 in drug and device payments (2025) · Telehealth · (415) 502-4444
Dr. Waseem Ahmad, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 502-4444
Dr. William Snape, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 600-1138
Dr. Wing Kam, M.D., PH.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 831-8383
Dr. Wint Thu Saung
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1000
Dr. Yao Heng, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 833-2000

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

Gastroenterology in all 50 states Search all 2,135 in the directory Ask Zach for help choosing

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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.