Medicare Advantage in Placer County, California
58,856 people in Placer County, California were enrolled in Medicare Advantage in October 2026, 57.2% of 102,901 eligible beneficiaries (−0.1 pts since October 2025). Kaiser Foundation Health Plan, Inc. is the largest parent organization with 61% of reported enrollment; 14 parent organizations have 11 or more members and the HHI is 4,116 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 1,275 members here are in plans that terminate or leave the county, and Molina Healthcare, Inc., Elevance Health, Inc. leave. MA plans offered go from 14 to 13.
Parent organizations in Placer County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Kaiser Foundation Health Plan, Inc. | 35,919 | +1,181 | 61.2% |
| SCAN Group | 6,725 | +6,714 | 11.5% |
| Alignment Healthcare USA, LLC | 6,649 | +1,294 | 11.3% |
| UnitedHealth Group, Inc. | 6,148 | −5,634 | 10.5% |
| California Physicians' Service | 1,137 | +170 | 1.9% |
| Elevance Health, Inc. | 649 | −184 | 1.1% |
| CVS Health Corporation | 454 | −1,443 | 0.8% |
| Imperial Health Plan of California | 335 | +128 | 0.6% |
| Centene Corporation | 290 | −398 | 0.5% |
| Molina Healthcare, Inc. | 230 | −140 | 0.4% |
| Total Community Options, Inc. | 76 | +7 | 0.1% |
| Humana Inc. | 74 | +33 | 0.1% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 25 | −1 | under 0.1% |
| Tungsten Health Holdings, LLC | 19 | new | under 0.1% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 13,594 beneficiaries in Placer County were assigned to 115 Medicare Shared Savings Program ACOs, 45.2% of assignable Original Medicare beneficiaries. Together, roughly 77% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.