MA Enrollment Explorer / Parent organizations / Kaiser Foundation Health Plan, Inc.
Kaiser Foundation Health Plan, Inc.: Medicare Advantage enrollment and market share
Kaiser Foundation Health Plan, Inc. had 2,077,542 Medicare Advantage members in October 2026, #4 nationally with 5.7% of all MA enrollment. It gained 70,327 members (+3.5%) since October 2025, and has enrollment in 13 states and 169 counties with 11 or more members, leading the market in 41 of them. In the 2026 Annual Election Period (December to February) it gained 24,883 members (+1.2%). For 2027, 30,850 of its members are in plans that terminate and 77,310 in plans leaving their county, and it leaves 21 counties entirely. Among members who stay, 82,960 lose a Part B giveback and 0 an OTC allowance.
2.08MMA members, October 2026
+3.5%change since October 2025 (+70,327)
5.7%national MA share, rank 4
11contracts with enrollment
Largest states
| State | Members | Share of state MA |
|---|---|---|
| California | 1,532,145 | 40.8% |
| Washington | 129,072 | 16.4% |
| Colorado | 115,166 | 20.3% |
| Oregon | 80,171 | 15.3% |
| Maryland | 75,840 | 25.5% |
| Georgia | 42,523 | 3.7% |
| Hawaii | 37,389 | 22.1% |
| Virginia | 33,882 | 4.9% |
| Nevada | 21,987 | 6.7% |
| District of Columbia | 6,573 | 19.5% |
| Arizona | 254 | 0.0% |
| Texas | 42 | 0.0% |
| Idaho | 16 | 0.0% |
Largest counties
| County | Members | Change since October 2025 | Share of county MA |
|---|---|---|---|
| Los Angeles County, CA | 342,678 | +11,730 | 34.8% |
| San Diego County, CA | 113,497 | +3,097 | 33.6% |
| Sacramento County, CA | 109,872 | +3,098 | 58.7% |
| Alameda County, CA | 108,683 | +4,110 | 73.4% |
| Contra Costa County, CA | 92,139 | +4,337 | 76.5% |
| Riverside County, CA | 91,156 | +4,982 | 31.5% |
| Santa Clara County, CA | 87,852 | +3,093 | 54.9% |
| Orange County, CA | 87,695 | +3,424 | 25.7% |
| San Bernardino County, CA | 83,275 | +3,769 | 34.9% |
| Sonoma County, CA | 51,999 | +2,195 | 78.6% |
| Solano County, CA | 44,337 | +2,246 | 85.1% |
| San Mateo County, CA | 43,155 | +1,380 | 58.6% |
| San Francisco County, CA | 36,793 | +838 | 44.3% |
| Placer County, CA | 35,919 | +1,181 | 61.2% |
| San Joaquin County, CA | 34,959 | +1,703 | 48.5% |
Contracts
| Contract | Plan type | Oct 2024 | Oct 2025 | Oct 2026 |
|---|---|---|---|---|
| H0524 Kaiser Permanente | HMO/HMOPOS | 1,312,062 | 1,353,048 | 1,387,940 |
| H8794 Kaiser Permanente | HMO/HMOPOS | 109,982 | 123,968 | 146,155 |
| H2172 Kaiser Permanente | HMO/HMOPOS | 109,992 | 111,520 | 116,462 |
| H0630 Kaiser Permanente | HMO/HMOPOS | 111,621 | 112,605 | 114,026 |
| H9003 Kaiser Permanente | HMO/HMOPOS | 104,310 | 107,116 | 110,386 |
| H5050 Kaiser Permanente | HMO/HMOPOS | 99,157 | 100,899 | 99,128 |
| H1170 Kaiser Permanente | HMO/HMOPOS | 38,784 | 40,297 | 42,620 |
| H1230 Kaiser Permanente | HMO/HMOPOS | 36,125 | 36,855 | 35,945 |
| H2960 Kaiser Permanente | HMO/HMOPOS | 19,042 | 19,915 | 22,016 |
| H2704 Kaiser Permanente | HMO/HMOPOS | n/a | n/a | 1,513 |
| H3138 Kaiser Permanente | Local PPO | 508 | 992 | 1,351 |
Star ratings for these contracts are in the MA Quality Dashboard.