MA Enrollment Explorer / Parent organizations / California Physicians' Service
California Physicians' Service: Medicare Advantage enrollment and market share
California Physicians' Service had 124,189 Medicare Advantage members in October 2026, #29 nationally with 0.34% of all MA enrollment. It lost 12,110 members (−8.9%) since October 2025, and has enrollment in 23 states and 165 counties with 11 or more members. In the 2026 Annual Election Period (December to February) it lost 11,029 members (−8.1%). For 2027, 0 of its members are in plans that terminate and 203 in plans leaving their county, and it leaves 1 county entirely.
124KMA members, October 2026
−8.9%change since October 2025 (−12,110)
0.34%national MA share, rank 29
4contracts with enrollment
Largest states
| State | Members | Share of state MA |
|---|---|---|
| California | 117,206 | 3.1% |
| Nevada | 952 | 0.3% |
| Arizona | 721 | 0.1% |
| Oregon | 609 | 0.1% |
| Texas | 364 | 0.0% |
| Washington | 355 | 0.0% |
| Idaho | 335 | 0.2% |
| Florida | 222 | 0.0% |
| Hawaii | 111 | 0.1% |
| Utah | 97 | 0.0% |
| Montana | 70 | 0.1% |
| Colorado | 70 | 0.0% |
| New Mexico | 63 | 0.0% |
| Georgia | 51 | 0.0% |
| North Carolina | 47 | 0.0% |
Largest counties
| County | Members | Change since October 2025 | Share of county MA |
|---|---|---|---|
| Los Angeles County, CA | 34,031 | −4,577 | 3.5% |
| Orange County, CA | 16,545 | −5,488 | 4.8% |
| San Diego County, CA | 12,624 | −578 | 3.7% |
| San Francisco County, CA | 6,687 | +83 | 8.1% |
| San Bernardino County, CA | 5,945 | +667 | 2.5% |
| Riverside County, CA | 4,363 | +104 | 1.5% |
| San Mateo County, CA | 4,214 | −892 | 5.7% |
| Sacramento County, CA | 3,730 | +535 | 2.0% |
| Santa Barbara County, CA | 3,650 | −112 | 20.8% |
| Contra Costa County, CA | 2,297 | +122 | 1.9% |
| Alameda County, CA | 2,214 | −934 | 1.5% |
| San Luis Obispo County, CA | 2,153 | +596 | 12.1% |
| Kern County, CA | 1,782 | −162 | 2.7% |
| Sonoma County, CA | 1,247 | +38 | 1.9% |
| San Joaquin County, CA | 1,226 | −1,329 | 1.7% |
Contracts
| Contract | Plan type | Oct 2024 | Oct 2025 | Oct 2026 |
|---|---|---|---|---|
| H0504 Blue Shield of California | HMO/HMOPOS | 73,795 | 63,735 | 54,946 |
| H4937 Blue Shield of California | Local PPO | 22,117 | 47,160 | 46,821 |
| H2819 Blue Shield of California | HMO/HMOPOS | 16,047 | 16,183 | 14,838 |
| H5928 Blue Shield of California | HMO/HMOPOS | 11,231 | 9,221 | 7,584 |
Star ratings for these contracts are in the MA Quality Dashboard.