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.
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| Gastroenterology in Los Angeles | 195 providers |
| Gastroenterology in San Diego | 126 providers |
| Gastroenterology in San Francisco | 103 providers |
| Gastroenterology in Sacramento | 89 providers |
| Gastroenterology in Stanford | 63 providers |
| Gastroenterology in San Jose | 46 providers |
| Gastroenterology in Orange | 45 providers |
| Gastroenterology in Torrance | 44 providers |
| Gastroenterology in Fresno | 41 providers |
| Gastroenterology in La Jolla | 36 providers |
| Gastroenterology in Loma Linda | 33 providers |
| Gastroenterology in Walnut Creek | 33 providers |
| Gastroenterology in Palo Alto | 29 providers |
| Gastroenterology in Oakland | 27 providers |
| Gastroenterology in Fremont | 26 providers |
| Gastroenterology in Santa Monica | 26 providers |
| Gastroenterology in West Hollywood | 26 providers |
| Gastroenterology in Anaheim | 25 providers |
| Gastroenterology in Newport Beach | 23 providers |
| Gastroenterology in Beverly Hills | 23 providers |
| Gastroenterology in Riverside | 22 providers |
| Gastroenterology in Irvine | 22 providers |
| Gastroenterology in Modesto | 21 providers |
| Gastroenterology in Santa Rosa | 19 providers |
From CMS Medicare enrollment records covering 1,498 of the 2,135 providers listed here (70%). Providers who do not bill Medicare are not included in these figures.
| Group (as registered with Medicare) | Gastroenterologists | All clinicians in group | Main city |
| Permanente Medical Group Inc. | 106 | 10,928 | Sacramento |
| Southern California Permanente Medical Group | 104 | 11,250 | Anaheim |
| Sutter Bay Medical Foundation | 66 | 3,783 | Palo Alto |
| The Regents of the University of California | 66 | 1,426 | Santa Monica |
| Genesis Healthcare Partners PC | 64 | 232 | Pasadena |
| Hospital | City | Ownership | CMS star rating | Gastroenterologists affiliated |
| Stanford Health Care | Stanford | Nonprofit | 5 of 5 | 86 |
| Ronald Reagan UCLA Medical Center | Los Angeles | Government | 4 of 5 | 71 |
| Cedars-Sinai Medical Center | Los Angeles | Nonprofit | 5 of 5 | 70 |
| Uci Health-Orange | Orange | Government | 4 of 5 | 53 |
| Santa Monica - UCLA Med Ctr & Orthopaedic Hospital | Santa Monica | Nonprofit | 5 of 5 | 43 |
Sources: CMS Doctors and Clinicians (August 2026) and Facility Affiliation files (August 2026); hospital ownership type and overall star rating from CMS Hospital General Information (July 2026). A clinician in several groups is counted once, in the largest group they bill through. Ownership type is what the hospital reports to CMS; it does not show private equity or other investor ownership. How we build this directory.
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.
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.
There are 2,135 Gastroenterology providers with active NPI records practicing in California, according to federal NPPES data refreshed monthly.
Yes. 918 of the 2,135 Gastroenterology providers in California (about 43%) report offering telehealth services in CMS data.
Los Angeles (195), San Diego (126), San Francisco (103) have the highest concentration of Gastroenterology providers in California.
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.
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.
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.
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.
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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