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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. Thomas Prindiville, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-7224
Dr. Tommy Poirier, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 733-5336
Dr. Valentina Medici, M.D.
Sacramento, CA · $4,475 in drug and device payments (2025) · Telehealth · (916) 734-7224
Dr. Yasser Al-antably, MD
Sacramento, CA · $48 in drug and device payments (2025) · (916) 973-5000
Dr. Yesenia Ramos, MD
Sacramento, CA · $92 in drug and device payments (2025) · (916) 734-8616
Dr. Ioana Bina, M.D.
Saint Helena, CA · No drug or device payments recorded (2025) · (707) 963-3322
Dr. Tegpal Atwal
Saint Helena, CA · No drug or device payments recorded (2025) · (707) 963-0267
Dr. John Carlson, M.D
Salinas, CA · No drug or device payments recorded (2025) · (831) 771-1456
Dr. Mumtaz Tabbaa, M.D.
Salinas, CA · No drug or device payments recorded (2025) · (831) 755-4111
Dr. Rita Lee, MD
Salinas, CA · No drug or device payments recorded (2025) · (831) 759-9232
Dr. Simran Sidhu
Salinas, CA · $1,105 in drug and device payments (2025) · (831) 424-8888
Dr. Steven Johnson, M.D
Salinas, CA · $2,508 in drug and device payments (2025) · Telehealth · (831) 424-8888
Dr. Vikram Patel, MD
Salinas, CA · $2,293 in drug and device payments (2025) · (831) 424-8888
Dr. Gabriella Aitcheson, MD
San Bernardino, CA · $262 in drug and device payments (2025) · Telehealth · (909) 558-3636
Dr. John Evans, MD
San Bernardino, CA · $99 in drug and device payments (2025) · (909) 886-2609
Dr. Won-seok Jo, M.D.
San Bernardino, CA · $895 in drug and device payments (2025) · (909) 796-0363
Dr. Adrienne Nguyen, MD
San Carlos, CA · No drug or device payments recorded (2025) · Telehealth · (650) 596-8800
Dr. Alyssa Caplan
San Carlos, CA · $1,044 in drug and device payments (2025) · Telehealth · (650) 596-8800
Dr. Roger Kao, M.D.
San Carlos, CA · $3,995 in drug and device payments (2025) · Telehealth · (650) 596-8800
Dr. Scott Levenson, MD
San Carlos, CA · $18,846 in drug and device payments (2025) · Telehealth · (650) 596-8800
Dr. Tohru Sato, MD
San Carlos, CA · $1,138 in drug and device payments (2025) · Telehealth · (650) 596-4130
Dr. Homayon Iraninezhad, DO
San Clemente, CA · $1,243 in drug and device payments (2025) · Telehealth · (949) 764-7569
Dr. Navjyot Gujral, M.D
San Clemente, CA · $878 in drug and device payments (2025) · Telehealth · (949) 443-1546
Dr. Alexander Shpaner, M.D.
San Diego, CA · $3,456 in drug and device payments (2025) · Telehealth · (619) 287-9100
Dr. Alexander Yang, M.D.
San Diego, CA · $142 in drug and device payments (2025) · Telehealth · (800) 926-8273
Dr. Alissa Speziale, M.D.
San Diego, CA · $162 in drug and device payments (2025) · Telehealth · (858) 939-6531
Dr. Amir Zarrinpar, MD, PHD
San Diego, CA · No drug or device payments recorded (2025) · (619) 543-6272
Dr. Andres Gottfried Blackmore, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (800) 926-8273
Dr. Andrew Cummins, M.D.
San Diego, CA · $1,610 in drug and device payments (2025) · Telehealth · (619) 291-6064
Dr. Andrew Su, M.D.
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (858) 939-6531
Dr. Armen Eskandari, MD
San Diego, CA · $1,210 in drug and device payments (2025) · Telehealth · (800) 926-8273
Dr. Arthur Yan, M.D
San Diego, CA · $1,443 in drug and device payments (2025) · Telehealth · (858) 292-7527
Dr. Barbara Jung, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (800) 926-8273
Dr. Benjamin Fiore, M.D
San Diego, CA · $115 in drug and device payments (2025) · (860) 394-9462
Dr. Bernd Schnabl, M.D.
San Diego, CA · $135 in drug and device payments (2025) · (800) 926-8273
Dr. Bhupesh Pokhrel, MD
San Diego, CA · $1,211 in drug and device payments (2025) · (619) 543-2347
Dr. Brett Sadowski, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 532-9750
Dr. Brigid Boland, M.D.
San Diego, CA · $9,059 in drug and device payments (2025) · Telehealth · (888) 309-8273
Dr. Cainan Foltz, MD
San Diego, CA · $1,172 in drug and device payments (2025) · Telehealth · (858) 292-7527
Dr. Carlton Thomas, M.D.
San Diego, CA · $1,132 in drug and device payments (2025) · (619) 266-3332
Dr. Caroline Diamant, M.D.
San Diego, CA · $18 in drug and device payments (2025) · (858) 764-3200
Dr. Carrie Wong, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (917) 405-3432
Dr. Chiara Maruggi
San Diego, CA · $1,306 in drug and device payments (2025) · Telehealth · (858) 764-3200
Dr. Christopher Costanza, MD
San Diego, CA · $370 in drug and device payments (2025) · (619) 528-5000
Dr. Cynthia Schaeffer, M.D.
San Diego, CA · $937 in drug and device payments (2025) · (619) 266-3332
Dr. Daniel Anderson, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-6550
Dr. Daniel Lee, M.D.
San Diego, CA · $426 in drug and device payments (2025) · Telehealth · (858) 292-7527
Dr. Darren Keller, M.D.
San Diego, CA · $1,000 in drug and device payments (2025) · Telehealth · (858) 939-6531
Dr. Daryl Fick, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 279-3961
Dr. David Kunkel, M.D.
San Diego, CA · $88,757 in drug and device payments (2025) · Telehealth · (800) 926-8273

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.