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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. Theodore Levin, MD
Walnut Creek, CA · $80 in drug and device payments (2025) · (925) 295-4000
Dr. Varujan Keledjian, M.D.
Walnut Creek, CA · $30 in drug and device payments (2025) · (925) 296-7340
Dr. Victoria Yung
Walnut Creek, CA · $1,332 in drug and device payments (2025) · Telehealth · (925) 967-2978
Dr. Will Lane, M.D.
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 932-6330
Dr. Ying Wang, MD
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 295-4000
Dr. Yi Zheng, M.D.
Walnut Creek, CA · $1,052 in drug and device payments (2025) · Telehealth · (925) 384-9276
Dr. Osama Sidhom, MD
West Corina, CA · $1,926 in drug and device payments (2025) · Telehealth · (626) 960-2326
Dr. Mumtaz Akram, M.D.
West Covina, CA · No drug or device payments recorded (2025) · (626) 960-9455
Dr. Patrick Truong, M.D.
West Covina, CA · $2,437 in drug and device payments (2025) · Telehealth · (626) 960-2326
Dr. Sartaj Arora, MD
West Covina, CA · $1,696 in drug and device payments (2025) · Telehealth · (626) 960-2326
Dr. Calin Arimie, MD
West Hills, CA · $1,327 in drug and device payments (2025) · Telehealth · (818) 593-2164
Dr. Craig Gluckman, MD
West Hills, CA · $121 in drug and device payments (2025) · Telehealth · (818) 340-8252
Dr. Danny Issa, MD
West Hills, CA · $115,501 in drug and device payments (2025) · Telehealth · (818) 340-8252
Dr. Gerald Rothman, MD
West Hills, CA · No drug or device payments recorded (2025) · (818) 346-9911
Dr. Jonathan Matthew, MD
West Hills, CA · $875 in drug and device payments (2025) · (818) 346-9911
Dr. Mona Rezapour, M.D.
West Hills, CA · $122,927 in drug and device payments (2025) · Telehealth · (818) 340-8252
Dr. Paul Gulsrud, MD
West Hills, CA · No drug or device payments recorded (2025) · (818) 712-9154
Dr. Pejman Zargar, M.D.
West Hills, CA · $182 in drug and device payments (2025) · Telehealth · (424) 467-1200
Dr. Robert Tamai
West Hills, CA · No drug or device payments recorded (2025) · Telehealth · (818) 340-8252
Dr. Ron Chitayat, MD
West Hills, CA · $333 in drug and device payments (2025) · Telehealth · (818) 992-8505
Dr. Stephen Herr, MD
West Hills, CA · $101 in drug and device payments (2025) · (818) 346-9911
Dr. Ali Rezaie
West Hollywood, CA · $100,064 in drug and device payments (2025) · Telehealth · (310) 423-6143
Dr. Amrit Kamboj, MD
West Hollywood, CA · $7,830 in drug and device payments (2025) · Telehealth · (310) 423-6143
Dr. Barham Abu Dayyeh, MD
West Hollywood, CA · $49,258 in drug and device payments (2025) · Telehealth · (310) 423-6082
Dr. Bianca Chang
West Hollywood, CA · $688 in drug and device payments (2025) · Telehealth · (818) 634-3603
Dr. Daniel Lew
West Hollywood, CA · $781 in drug and device payments (2025) · (310) 423-8056
Dr. David Cohen, MD PHD
West Hollywood, CA · $9,772 in drug and device payments (2025) · (310) 423-6000
Dr. Dermot Mcgovern, M.D., PH.D., MRCP
West Hollywood, CA · No drug or device payments recorded (2025) · Telehealth · (310) 423-4100
Dr. Eric Vasiliauskas, M.D.
West Hollywood, CA · No drug or device payments recorded (2025) · Telehealth · (310) 423-4100
Dr. Gregory Eustace, MD
West Hollywood, CA · No drug or device payments recorded (2025) · (310) 570-0900
Dr. Hyunseok Kim, M.D, M.P.H
West Hollywood, CA · $171 in drug and device payments (2025) · Telehealth · (310) 423-2641
Dr. Jamil Samaan, M.D.
West Hollywood, CA · No drug or device payments recorded (2025) · (310) 423-6082
Dr. Jane Lim, M.D.
West Hollywood, CA · $96 in drug and device payments (2025) · Telehealth · (310) 423-6143
Dr. Jeffery Venner, MD MSC FRCPC
West Hollywood, CA · No drug or device payments recorded (2025) · (310) 423-3277
Dr. Jenan Ghaith, MD
West Hollywood, CA · No drug or device payments recorded (2025) · (310) 423-2700
Dr. Kapil Gupta, MD
West Hollywood, CA · $116 in drug and device payments (2025) · (310) 423-6082
Dr. Kavya Reddy, M.D.
West Hollywood, CA · $226 in drug and device payments (2025) · Telehealth · (310) 423-6143
Dr. Kenneth Park, M.D., M.SC.
West Hollywood, CA · $18,017 in drug and device payments (2025) · Telehealth · (310) 423-6082
Dr. Marc Kaneshiro, M.D.
West Hollywood, CA · $346 in drug and device payments (2025) · Telehealth · (310) 423-4611
Dr. Maria Abreu, M.D.
West Hollywood, CA · $58,498 in drug and device payments (2025) · Telehealth · (310) 423-4100
Dr. Phillip Gu, MD
West Hollywood, CA · $53 in drug and device payments (2025) · Telehealth · (310) 423-4100
Dr. Puja Khanna, M.D.
West Hollywood, CA · No drug or device payments recorded (2025) · Telehealth · (310) 423-4100
Dr. Rabindra Watson, M.D.
West Hollywood, CA · $44,246 in drug and device payments (2025) · Telehealth · (310) 423-6082
Dr. Rashmi Advani, M.D.
West Hollywood, CA · $24,158 in drug and device payments (2025) · Telehealth · (310) 423-6082
Dr. Sepehr Nassiri
West Hollywood, CA · $15 in drug and device payments (2025) · (310) 423-6143
Dr. Srinivas Gaddam, MD
West Hollywood, CA · $2,837 in drug and device payments (2025) · Telehealth · (310) 123-5000
Dr. Waseem Ahmed, MD
West Hollywood, CA · $125 in drug and device payments (2025) · Telehealth · (310) 423-4100
Dr. Hector Caballero, MD
Westlake Village, CA · No drug or device payments recorded (2025) · (805) 495-0823
Dr. Long Dang, M.D.
Westminster, CA · $12,253 in drug and device payments (2025) · (714) 839-9091
Dr. Ahilan Arulanandan, MD
Whittier, CA · No drug or device payments recorded (2025) · (562) 698-0306

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.

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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.