HealthcareDiscovery.AI / Doctors / California / Gastroenterology

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. Lloyd Garren, M.D.
Monterey, CA · No drug or device payments recorded (2025) · (831) 375-3577
Dr. Mary Garren, M.D.
Monterey, CA · No drug or device payments recorded (2025) · (831) 375-3577
Dr. Michael Le, M.D.
Monterey, CA · $196 in drug and device payments (2025) · Telehealth · (831) 375-3577
Dr. Michael Mendoza, M.D.
Monterey, CA · $2,205 in drug and device payments (2025) · Telehealth · (831) 375-3577
Dr. Michael Smith, M.D.
Monterey, CA · No drug or device payments recorded (2025) · (831) 375-3577
Dr. Richard Hell, M.D.
Monterey, CA · $796 in drug and device payments (2025) · Telehealth · (831) 375-3577
Dr. Steve Hu
Monterey, CA · $169 in drug and device payments (2025) · Telehealth · (831) 375-3577
Dr. Toby Katz, M.D.
Monterey, CA · $722 in drug and device payments (2025) · Telehealth · (831) 375-3577
Dr. Chia Chi Lai, M.D.
Monterey Park, CA · $700 in drug and device payments (2025) · Telehealth · (626) 280-5009
Dr. Chun Hsu, M.D.
Monterey Park, CA · $150 in drug and device payments (2025) · (626) 573-9979
Dr. Dennis Chan, M. D.
Monterey Park, CA · $720 in drug and device payments (2025) · Telehealth · (626) 280-3225
Dr. Fernando Ibarra, MD
Monterey Park, CA · $148 in drug and device payments (2025) · (626) 284-1350
Dr. Firmin Ho, M.D.
Monterey Park, CA · $62 in drug and device payments (2025) · (626) 280-3150
Dr. Kwok Leung Chung, M.D.
Monterey Park, CA · $1,019 in drug and device payments (2025) · Telehealth · (626) 307-0828
Dr. Mordo Suchov, MD
Monterey Park, CA · $82 in drug and device payments (2025) · Telehealth · (213) 483-4500
Dr. Shih-lin Lue, M.D.
Monterey Park, CA · No drug or device payments recorded (2025) · (626) 571-4008
Dr. Suisun Chan, M.D.
Monterey Park, CA · $106 in drug and device payments (2025) · Telehealth · (626) 288-8292
Dr. Yang Liu, M.D.
Monterey Park, CA · $1,897 in drug and device payments (2025) · (626) 280-3003
Dr. Steve Serrao, M.D.
Moreno Valley, CA · $2,085 in drug and device payments (2025) · (951) 486-5761
Dr. Yogendra Patel, MD
Moreno Valley, CA · No drug or device payments recorded (2025) · (951) 924-9300
Dr. Abhishek Choudhary, MD
Mountain View, CA · $3,305 in drug and device payments (2025) · Telehealth · (510) 574-7720
Dr. Andrew Lipton, MD
Mountain View, CA · No drug or device payments recorded (2025) · (650) 964-7700
Dr. Aurelia Fu, MD
Mountain View, CA · No drug or device payments recorded (2025) · Telehealth · (650) 934-7575
Dr. David Nano, MD
Mountain View, CA · No drug or device payments recorded (2025) · (650) 934-7575
Dr. Edward Huang, MD, MPH
Mountain View, CA · $376 in drug and device payments (2025) · Telehealth · (650) 934-7575
Dr. Erin Libuit, MD
Mountain View, CA · No drug or device payments recorded (2025) · Telehealth · (650) 934-7575
Dr. George Tinawi, MD
Mountain View, CA · No drug or device payments recorded (2025) · (650) 988-7488
Dr. Howard Herzenberg, M.D.
Mountain View, CA · No drug or device payments recorded (2025) · (650) 934-7575
Dr. Jay Ladenheim
Mountain View, CA · No drug or device payments recorded (2025) · (408) 739-6000
Dr. Jiayi Li, M.D.
Mountain View, CA · $504 in drug and device payments (2025) · Telehealth · (650) 934-7575
Dr. Katerina Shetler, MD
Mountain View, CA · $76 in drug and device payments (2025) · Telehealth · (650) 934-7575
Dr. Nicole Simpson, M.D
Mountain View, CA · $33 in drug and device payments (2025) · Telehealth · (650) 934-7575
Dr. Peter Simpson, MD, MPH
Mountain View, CA · $33 in drug and device payments (2025) · Telehealth · (650) 934-7575
Dr. Radhika Kumari, MD
Mountain View, CA · $97 in drug and device payments (2025) · Telehealth · (650) 769-5248
Dr. Robert Bronstone, M.D.
Mountain View, CA · No drug or device payments recorded (2025) · (650) 969-2101
Dr. Roy Soetikno, MD
Mountain View, CA · No drug or device payments recorded (2025) · (650) 492-3384
Dr. Sanjay Ramrakhiani, M.D.
Mountain View, CA · $14 in drug and device payments (2025) · Telehealth · (650) 934-7575
Dr. Sanjeev Tummala, MD
Mountain View, CA · $89 in drug and device payments (2025) · Telehealth · (650) 934-7575
Dr. Arian Teymoorian, M.D.
Murrieta, CA · $2,224 in drug and device payments (2025) · (951) 600-0288
Dr. Christina Steinhauser, D.O.
Murrieta, CA · $751 in drug and device payments (2025) · Telehealth · (951) 566-5229
Dr. Huafeng Shen, M.D.
Murrieta, CA · $2,214 in drug and device payments (2025) · Telehealth · (951) 566-5229
Dr. James Kao, MD
Murrieta, CA · $2,008 in drug and device payments (2025) · Telehealth · (951) 566-5229
Dr. Liza Plafsky, MD
Murrieta, CA · $1,297 in drug and device payments (2025) · Telehealth · (951) 566-5229
Dr. Naishadh Raghuwanshi, MD, MBA
Murrieta, CA · $2,352 in drug and device payments (2025) · (951) 304-9300
Dr. Seyedehsan Navabi, M.D.
Murrieta, CA · $144,144 in drug and device payments (2025) · Telehealth · (951) 566-5229
Dr. Thomas Kemmerly, M.D.
Murrieta, CA · $607 in drug and device payments (2025) · (951) 600-0288
Dr. Daniel Conlin, M.D.
Napa, CA · $981 in drug and device payments (2025) · Telehealth · (707) 254-1774
Dr. David Freeto, M.D.
Napa, CA · No drug or device payments recorded (2025) · (707) 257-0447
Dr. Robert Talley, M.D.
Napa, CA · No drug or device payments recorded (2025) · (707) 257-0447
Dr. Iman Mikhail, MD
National City, CA · No drug or device payments recorded (2025) · (619) 470-2300

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

Related

Try a city like Tucson, a zip like 85016, or a specialty like psychiatry. For a doctor by name, use the full search.
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.