Gastroenterologists in California: 1,614 enrolled in Medicare
California has 1,614 gastroenterologists enrolled in Medicare in the CMS file dated Aug 18, 2026, or 4.1 per 100,000 residents. That ranks 28th of 51 (the states and DC); the US rate is 4.7. Most are in Los Angeles, 157. California holds 10% of the country's gastroenterologists.
By Ryan Doyle, founder of Doctor Email List. Published Oct 5, 2026.
Where California gastroenterologists practice
The five cities below hold 25% of California's gastroenterologists. 192 practices and hospitals in the state have at least one listed.
| City | Gastroenterologists | Share of California |
|---|---|---|
| Los Angeles | 157 | 9.7% |
| San Francisco | 94 | 5.8% |
| San Diego | 67 | 4.2% |
| Sacramento | 52 | 3.2% |
| San Jose | 39 | 2.4% |
Largest practice groups for California gastroenterologists
82% of California gastroenterologists with a group on file sit in groups of 50 or more listed clinicians; the US figure is 83%.
| Practice or health system, as CMS prints it | California gastroenterologists listed |
|---|---|
| Permanente Medical Group Inc | 133 |
| Sutter Bay Medical Foundation | 82 |
| The Regents of the University of California | 73 |
| Genesis Healthcare Partners PC | 66 |
| Southern California Permanente Medical Group | 65 |
California against the US
| Measure | California | United States |
|---|---|---|
| Gastroenterologists per 100,000 residents | 4.1 | 4.7 |
| Women | 27% | 25% |
| Median year of medical school graduation | 2002 | 2002 |
| Offer telehealth | 61% | 43% |
| In groups of 50 or more listed clinicians | 82% | 83% |
Just above California: Arizona, 4.2. Just below: North Dakota, 4.0. The range runs from Wyoming (1.7) to Washington DC (14.4). The doctors per capita tool has every state for 51 specialties.
The gastroenterologist email list is one national CSV, $295 one time; the 1,614 California rows are one filter away.
Buy the gastroenterologist list, $295Questions about California gastroenterologists
1,614, enrolled in Medicare as of the CMS file dated Aug 18, 2026, or 4.1 per 100,000 residents. Los Angeles (157), San Francisco (94) and San Diego (67) lead the cities, and Permanente Medical Group Inc lists the most of any group, 133. Physicians who bill no Medicare patients are not in the file.
Not as a separate file: the gastroenterologist list is national, $295 once. State and ZIP are on nearly every row, so the 1,614 California rows are one filter away.
Gastroenterologists in other large states
Other specialties in California
Specialty email lists
National CSVs, one per specialty. City, state and ZIP are on the rows, so any state is one filter away.