Medicare Advantage in Amador County, California
3,607 people in Amador County, California were enrolled in Medicare Advantage in October 2026, 28.6% of 12,590 eligible beneficiaries (−2.0 pts since October 2025). Kaiser Foundation Health Plan, Inc. is the largest parent organization with 47% of reported enrollment; 8 parent organizations have 11 or more members and the HHI is 2,884 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 525 members here are in plans that terminate or leave the county. MA plans offered go from 6 to 5.
Parent organizations in Amador County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Kaiser Foundation Health Plan, Inc. | 1,661 | +28 | 46.7% |
| UnitedHealth Group, Inc. | 685 | −347 | 19.3% |
| Centene Corporation | 536 | +410 | 15.1% |
| Elevance Health, Inc. | 251 | −76 | 7.1% |
| Imperial Health Plan of California | 217 | +175 | 6.1% |
| California Physicians' Service | 139 | −2 | 3.9% |
| CVS Health Corporation | 40 | −397 | 1.1% |
| Cambia Health Solutions, Inc. | 27 | −2 | 0.8% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 2,873 beneficiaries in Amador County were assigned to 38 Medicare Shared Savings Program ACOs, 46.3% of assignable Original Medicare beneficiaries. Together, roughly 62% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.