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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. William Thurston, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Cameron Locke, MD
San Leandro, CA · No drug or device payments recorded (2025) · (785) 769-4202
Dr. Miles Adler, M.D.
San Leandro, CA · No drug or device payments recorded (2025) · (510) 357-8180
Dr. Nathan Kam, M.D.
San Leandro, CA · $66 in drug and device payments (2025) · (510) 454-1000
Dr. Nathan Pham, MD
San Leandro, CA · No drug or device payments recorded (2025) · Telehealth · (510) 591-3592
Dr. Tanaaz Baldawala, M.D.
San Leandro, CA · No drug or device payments recorded (2025) · (510) 454-1000
Dr. Vinod Sawhney, M.D.
San Leandro, CA · $254 in drug and device payments (2025) · Telehealth · (510) 351-6424
Dr. Damian Fernandez, M.D.
San Luis Obispo, CA · $74 in drug and device payments (2025) · Telehealth · (516) 572-5881
Dr. Daniel Zovich, MD
San Luis Obispo, CA · No drug or device payments recorded (2025) · (805) 476-6410
Dr. Gary Cushing, M.D.
San Luis Obispo, CA · No drug or device payments recorded (2025) · (805) 549-7843
Dr. Jeffrey Mundorf, M.D.
San Luis Obispo, CA · $123 in drug and device payments (2025) · Telehealth · (805) 434-5530
Dr. Klaus Gottlieb, MD
San Luis Obispo, CA · No drug or device payments recorded (2025) · (805) 434-2434
Dr. Mick Meiselman, MD
San Luis Obispo, CA · $739 in drug and device payments (2025) · Telehealth · (805) 549-9555
Dr. Neal Moller, MD
San Luis Obispo, CA · $138 in drug and device payments (2025) · (805) 541-1422
Dr. Nicholas Placone
San Luis Obispo, CA · $161 in drug and device payments (2025) · Telehealth · (805) 434-5530
Dr. Paul Guzik, DO
San Luis Obispo, CA · $23 in drug and device payments (2025) · Telehealth · (805) 434-5530
Dr. Paul Wetzel, M.D.
San Luis Obispo, CA · $626 in drug and device payments (2025) · (805) 261-1044
Dr. Rabab Hajar, M.D
San Luis Obispo, CA · $23 in drug and device payments (2025) · (805) 541-1422
Dr. Steven Carlson, MD
San Luis Obispo, CA · No drug or device payments recorded (2025) · (805) 543-8822
Dr. Vance Rodgers, M.D.
San Luis Obispo, CA · No drug or device payments recorded (2025) · (805) 434-5530
Dr. Michael Mctigue, M.D.
San Marcos, CA · No drug or device payments recorded (2025) · (877) 236-0333
Dr. Daniel Rengstorff, M.D.
San Mateo, CA · $72 in drug and device payments (2025) · Telehealth · (650) 341-9131
Dr. Robert Wilkes, MD
San Mateo, CA · No drug or device payments recorded (2025) · (650) 888-1196
Dr. Stanley Hui, M.D.
San Mateo, CA · $246 in drug and device payments (2025) · (650) 573-2222
Dr. Stanley Rockman, M.D.
San Mateo, CA · No drug or device payments recorded (2025) · (650) 573-2222
Dr. Gerald Schaffer, MD
San Pablo, CA · No drug or device payments recorded (2025) · (510) 234-5012
Dr. Jacqueline Park, M.D.
San Pablo, CA · No drug or device payments recorded (2025) · (510) 234-5012
Dr. Kiran Narsinh, M.D.
San Pablo, CA · $618 in drug and device payments (2025) · Telehealth · (510) 234-5012
Dr. Mark Kogan, M.D.
San Pablo, CA · $1,658 in drug and device payments (2025) · Telehealth · (510) 234-5012
Dr. Morris Taub, M.D.
San Pedro, CA · No drug or device payments recorded (2025) · (310) 832-1152
Dr. Jeffrey Fox, MD
San Rafael, CA · No drug or device payments recorded (2025) · (415) 444-2000
Dr. Nels Thygeson, M.D.
San Rafael, CA · No drug or device payments recorded (2025) · (651) 269-1404
Dr. Robert Myers, MD
San Rafael, CA · No drug or device payments recorded (2025) · (415) 444-2000
Dr. Sheba Vohra, M.D.
San Rafael, CA · No drug or device payments recorded (2025) · (415) 444-2929
Dr. Amee Mapara-shah, M.D.
San Ramon, CA · No drug or device payments recorded (2025) · Telehealth · (518) 312-7043
Dr. Bijan Nejadnik, MD
San Ramon, CA · No drug or device payments recorded (2025) · (925) 234-0313
Dr. David Wong, M.D.
San Ramon, CA · $2,871 in drug and device payments (2025) · Telehealth · (925) 275-9966
Dr. Frederick Rowe, M.D.
San Ramon, CA · $57 in drug and device payments (2025) · (925) 901-1303
Dr. Philip Yee, M.D.
San Ramon, CA · $1,972 in drug and device payments (2025) · Telehealth · (925) 275-1811
Dr. Seyed Pakseresht, MD
San Ramon, CA · $1,567 in drug and device payments (2025) · Telehealth · (925) 901-1303
Dr. Carlos Saad, MD
Santa Ana, CA · $20 in drug and device payments (2025) · Telehealth · (714) 558-8133
Dr. Christopher Bui, MD
Santa Ana, CA · $14,408 in drug and device payments (2025) · (714) 531-3535
Dr. Essam Quraishi, MD
Santa Ana, CA · $981 in drug and device payments (2025) · Telehealth · (657) 900-4536
Dr. Javed Sadiq, M.D.
Santa Ana, CA · $1,199 in drug and device payments (2025) · Telehealth · (657) 900-4536
Dr. Manuchehr Darani, M.D.
Santa Ana, CA · No drug or device payments recorded (2025) · (714) 957-2738
Dr. Brent Kovacs, MD
Santa Barbara, CA · $73 in drug and device payments (2025) · Telehealth · (805) 682-3585
Dr. Edward Bentley, M.D.
Santa Barbara, CA · No drug or device payments recorded (2025) · (805) 682-3585
Dr. Gary Van Deventer, MD
Santa Barbara, CA · $450 in drug and device payments (2025) · Telehealth · (805) 563-0024
Dr. James Egan, M.D.
Santa Barbara, CA · $418 in drug and device payments (2025) · (805) 681-1761
Dr. Jeffrey Rebhun, MD
Santa Barbara, CA · $153 in drug and device payments (2025) · Telehealth · (805) 898-3120

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.