Radiologists in California: 4,442 enrolled in Medicare
California has 4,442 radiologists enrolled in Medicare in the CMS file dated Aug 18, 2026, or 11.3 per 100,000 residents. That ranks 18th of 51 (the states and DC); the US rate is 11.1. Most are in Los Angeles, 592. California holds 12% of the country's radiologists.
By Ryan Doyle, founder of Doctor Email List. Published Oct 5, 2026.
Where California radiologists practice
The five cities below hold 28% of California's radiologists. 338 practices and hospitals in the state have at least one listed.
| City | Radiologists | Share of California |
|---|---|---|
| Los Angeles | 592 | 13% |
| San Francisco | 247 | 5.6% |
| San Diego | 150 | 3.4% |
| San Jose | 135 | 3% |
| Stanford | 123 | 2.8% |
Largest practice groups for California radiologists
93% of California radiologists with a group on file sit in groups of 50 or more listed clinicians; the US figure is 88%.
| Practice or health system, as CMS prints it | California radiologists listed |
|---|---|
| Permanente Medical Group Inc | 436 |
| Southern California Permanente Medical Group | 358 |
| Stanford Health Care | 187 |
| Sutter Valley Medical Foundation | 181 |
| Cedars-Sinai Medical Care Foundation | 163 |
California against the US
| Measure | California | United States |
|---|---|---|
| Radiologists per 100,000 residents | 11.3 | 11.1 |
| Women | 26% | 25% |
| Median year of medical school graduation | 2004 | 2004 |
| Offer telehealth | 4.8% | 3.4% |
| In groups of 50 or more listed clinicians | 93% | 88% |
Just above California: Arizona, 11.5. Just below: New Hampshire, 11.1. The range runs from Rhode Island (3.6) to Washington DC (40.0). The doctors per capita tool has every state for 51 specialties.
The radiologist email list is one national CSV, $295 one time; the 4,442 California rows are one filter away.
Buy the radiologist list, $295Questions about California radiologists
4,442, enrolled in Medicare as of the CMS file dated Aug 18, 2026, or 11.3 per 100,000 residents. Los Angeles (592), San Francisco (247) and San Diego (150) lead the cities, and Permanente Medical Group Inc lists the most of any group, 436. Physicians who bill no Medicare patients are not in the file.
Not as a separate file: the radiologist list is national, $295 once. State and ZIP are on nearly every row, so the 4,442 California rows are one filter away.
Radiologists 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.