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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. James Sul, MD
Santa Monica, CA · $2,717 in drug and device payments (2025) · Telehealth · (310) 829-6789
Dr. Jerome Helman, MD
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 828-7877
Dr. Kamyar Shahedi, M.D.
Santa Monica, CA · $1,618 in drug and device payments (2025) · Telehealth · (310) 829-6789
Dr. Lenna Martyak, M.D.
Santa Monica, CA · $2,301 in drug and device payments (2025) · Telehealth · (310) 829-6789
Dr. Louis Ravitz, MD
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 828-9311
Dr. Lynn Connolly, M.D.
Santa Monica, CA · $125 in drug and device payments (2025) · Telehealth · (310) 828-7172
Dr. Marc Harwitt, M.D.
Santa Monica, CA · $28 in drug and device payments (2025) · (310) 829-6789
Dr. Marc Wishingrad, MD
Santa Monica, CA · $94 in drug and device payments (2025) · Telehealth · (310) 453-1871
Dr. Martha Hierro, M.D.
Santa Monica, CA · $794 in drug and device payments (2025) · Telehealth · (310) 471-9917
Dr. Nathan Elson, M.D.
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 828-9495
Dr. Parviz Afshani, M.D.
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 829-6789
Dr. Rahul Dixit, M.D.
Santa Monica, CA · $6,852 in drug and device payments (2025) · Telehealth · (310) 829-6789
Dr. Richard Corlin, M.D.
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 829-6789
Dr. Rudolph Bedford, M.D.
Santa Monica, CA · $4,981 in drug and device payments (2025) · Telehealth · (310) 829-6789
Dr. Tram Tran, M.D.
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 319-4698
Dr. Uzoamaka Dike, M.D.
Santa Monica, CA · $125 in drug and device payments (2025) · Telehealth · (310) 453-1871
Dr. Vivy Cusumano
Santa Monica, CA · $58 in drug and device payments (2025) · Telehealth · (310) 582-6240
Dr. William Katkov, M.D.
Santa Monica, CA · $783 in drug and device payments (2025) · Telehealth · (310) 453-1871
Dr. Alexander Lustberg, M.D.
Santa Rosa, CA · $5,135 in drug and device payments (2025) · Telehealth · (707) 303-8349
Dr. Aruna Jayaraman, M.D., M.H.S.
Santa Rosa, CA · No drug or device payments recorded (2025) · (707) 228-8803
Dr. Fathima Suhail, MD
Santa Rosa, CA · $113 in drug and device payments (2025) · Telehealth · (707) 541-7900
Dr. Frances Lu, MD
Santa Rosa, CA · $802 in drug and device payments (2025) · Telehealth · (707) 303-8350
Dr. Frank Anderson, MD
Santa Rosa, CA · $29 in drug and device payments (2025) · Telehealth · (707) 541-7900
Dr. Jay Gospe, M.D.
Santa Rosa, CA · No drug or device payments recorded (2025) · (707) 542-8474
Dr. Jeffrey Rothman, M.D.
Santa Rosa, CA · No drug or device payments recorded (2025) · (760) 500-1566
Dr. Joshua Beirne, M.D.
Santa Rosa, CA · $432 in drug and device payments (2025) · Telehealth · (707) 303-8360
Dr. Paul Kefalides, M.D.
Santa Rosa, CA · No drug or device payments recorded (2025) · Telehealth · (707) 591-0619
Dr. Razi Arifuddin, MD
Santa Rosa, CA · $213 in drug and device payments (2025) · Telehealth · (707) 303-8360
Dr. Richard Auld, MD
Santa Rosa, CA · No drug or device payments recorded (2025) · (707) 544-5093
Dr. Richard Permutt, MD
Santa Rosa, CA · No drug or device payments recorded (2025) · (707) 571-4000
Dr. Robert Faust, M.D.
Santa Rosa, CA · $51 in drug and device payments (2025) · (707) 544-5093
Dr. Robert Lam, M.D.
Santa Rosa, CA · $1,413 in drug and device payments (2025) · Telehealth · (707) 566-5875
Dr. Runalia Bahar, M.D.
Santa Rosa, CA · $29 in drug and device payments (2025) · Telehealth · (707) 541-7900
Dr. Scott Trahms, MD
Santa Rosa, CA · No drug or device payments recorded (2025) · (707) 571-4000
Dr. Thomas Morales, M.D.
Santa Rosa, CA · No drug or device payments recorded (2025) · (707) 303-8360
Dr. Timothy Hurley, MD
Santa Rosa, CA · No drug or device payments recorded (2025) · (707) 571-4000
Dr. Zoe Memel, MD
Santa Rosa, CA · $306 in drug and device payments (2025) · Telehealth · (323) 646-6783
Dr. Ananthram Reddy, M.D.
Santee, CA · $2,379 in drug and device payments (2025) · Telehealth · (619) 588-4074
Dr. Joseph Reddy, M.D.
Santee, CA · $30 in drug and device payments (2025) · Telehealth · (619) 588-4074
Dr. Magdalena Kaczynska, MD
Seaside, CA · No drug or device payments recorded (2025) · (831) 883-3810
Dr. Hemant Pande, M.D.
Sherman Oaks, CA · $1,788 in drug and device payments (2025) · (818) 325-0200
Dr. Edward Laurance, MD
Sierra Madre, CA · $30 in drug and device payments (2025) · (626) 836-6900
Dr. Burton Smith, MD
Signal Hill, CA · No drug or device payments recorded (2025) · (562) 595-0203
Dr. Adrienne Lenhart
Simi Valley, CA · $18 in drug and device payments (2025) · Telehealth · (805) 583-7640
Dr. Mahendra Patel, M.D.
Simi Valley, CA · $1,124 in drug and device payments (2025) · (805) 526-6016
Dr. Mayur Trivedi, MD
Simi Valley, CA · $1,555 in drug and device payments (2025) · Telehealth · (805) 492-4463
Dr. Moe Amadpour, M.D.
Simi Valley, CA · $3,486 in drug and device payments (2025) · Telehealth · (805) 583-2643
Dr. Robert Moghimi, M.D.
Simi Valley, CA · $1,892 in drug and device payments (2025) · (805) 526-6016
Dr. Jessica Nash, DO
Sonora, CA · $377 in drug and device payments (2025) · Telehealth · (209) 536-5760
Dr. Julia Dean, FNP
Sonora, CA · $678 in drug and device payments (2025) · Telehealth · (209) 536-5760

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.