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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. Hamed Nayeb-hashemi
Los Angeles, CA · $136 in drug and device payments (2025) · Telehealth · (805) 418-3500
Dr. Harold Paredes, MD
Los Angeles, CA · $429 in drug and device payments (2025) · (310) 208-5400
Dr. Harpreet Sekhon, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-4011
Dr. Hartley Cohen, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (213) 977-1010
Dr. Hasham Masood Qureshi, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 319-4698
Dr. Herbert Kornfeld, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 553-2122
Dr. Ho Bae, M.D.
Los Angeles, CA · $3,478 in drug and device payments (2025) · Telehealth · (213) 368-0360
Dr. Howard Fullman, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 857-2000
Dr. Howard Schecter, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 306-9100
Dr. Hyo-rang Lee, M.D.,PH.D
Los Angeles, CA · $84 in drug and device payments (2025) · (213) 739-0007
Dr. Ian Gralnek, MD
Los Angeles, CA · $9,586 in drug and device payments (2025) · (310) 794-9718
Dr. Ioannis Giannikopoulos, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (909) 919-9296
Dr. Jacques Van Dam, M.D., PH.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 442-5100
Dr. Jaime Chen, MD
Los Angeles, CA · $1,715 in drug and device payments (2025) · (323) 857-2000
Dr. James Buxbaum, M.D.
Los Angeles, CA · $23,833 in drug and device payments (2025) · Telehealth · (323) 442-5100
Dr. Jason Ho, MD
Los Angeles, CA · $390 in drug and device payments (2025) · (323) 409-1000
Dr. Jason Pan, MD
Los Angeles, CA · $29 in drug and device payments (2025) · Telehealth · (310) 208-5400
Dr. Jasvant Modi, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (213) 999-7011
Dr. Jay Guan, M.D.
Los Angeles, CA · $2,766 in drug and device payments (2025) · Telehealth · (323) 226-7556
Dr. Jay Marks, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 469-4499
Dr. Jeffrey Lewis, MD
Los Angeles, CA · $293 in drug and device payments (2025) · Telehealth · (310) 208-5400
Dr. Jeffrey Sherman, MD
Los Angeles, CA · $2,069 in drug and device payments (2025) · (310) 659-9600
Dr. Jennifer Chan, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 597-0640
Dr. Jenny Sauk
Los Angeles, CA · $44,696 in drug and device payments (2025) · Telehealth · (855) 423-8252
Dr. Jeremy Herman, MD
Los Angeles, CA · $528 in drug and device payments (2025) · Telehealth · (310) 948-2797
Dr. Jeremy Wang
Los Angeles, CA · $2,467 in drug and device payments (2025) · (310) 825-9111
Dr. Jerome Goldwasser, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 652-4472
Dr. Jiaming Zhu, M.D.
Los Angeles, CA · $1,299 in drug and device payments (2025) · (323) 226-7556
Dr. Jihane Benhammou, B.S.
Los Angeles, CA · $588 in drug and device payments (2025) · (310) 208-5400
Dr. John Debanto, MD
Los Angeles, CA · $14 in drug and device payments (2025) · (678) 897-3726
Dr. John Kim, M.D.
Los Angeles, CA · $135 in drug and device payments (2025) · (323) 442-5100
Dr. John Lunn, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-6301
Dr. Jonathan Chang, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 819-2651
Dr. Jonathan Kaunitz, M.D.
Los Angeles, CA · $55 in drug and device payments (2025) · (310) 268-3879
Dr. Jonathan Pourmorady
Los Angeles, CA · $1,154 in drug and device payments (2025) · Telehealth · (310) 933-3229
Dr. Joseph Pisegna, MD
Los Angeles, CA · $42,267 in drug and device payments (2025) · Telehealth · (310) 794-9718
Dr. Kareem Sassi, M.D.
Los Angeles, CA · $333 in drug and device payments (2025) · Telehealth · (310) 825-6240
Dr. Karen Lindsay, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (626) 457-5839
Dr. Karl Kwok, MD
Los Angeles, CA · $1,465 in drug and device payments (2025) · (800) 954-8000
Dr. Kenny Liu, MD
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (323) 783-4011
Dr. Kevin Ghassemi, M.D.
Los Angeles, CA · $292 in drug and device payments (2025) · Telehealth · (310) 208-5400
Dr. Kevin Horgan, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 794-9718
Dr. Khalid Al Shamousi, MD, FRCPC
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 423-8056
Dr. Kirsten Tillisch, MD
Los Angeles, CA · $125 in drug and device payments (2025) · (310) 208-5400
Dr. Laurie Deleve, M.D.
Los Angeles, CA · $4,250 in drug and device payments (2025) · Telehealth · (323) 442-5100
Dr. Lillian Du, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 423-4100
Dr. Lily Dara, M.D.
Los Angeles, CA · $10,022 in drug and device payments (2025) · Telehealth · (323) 442-5100
Dr. Lin Chang, MD
Los Angeles, CA · $8,218 in drug and device payments (2025) · Telehealth · (310) 825-1597
Dr. Ling Shao, M.D.,PH.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 442-5100
Dr. Mamatha Sadda, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 967-1884

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.