Medicare Advantage in Lassen County, California
522 people in Lassen County, California were enrolled in Medicare Advantage in October 2026, 9.1% of 5,757 eligible beneficiaries (+0.3 pts since October 2025). Humana Inc. is the largest parent organization with 72% of reported enrollment; 4 parent organizations have 11 or more members and the HHI is 5,558 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 0 members here are in plans that terminate or leave the county. MA plans offered go from 2 to 2.
Parent organizations in Lassen County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 345 | +17 | 72.5% |
| UnitedHealth Group, Inc. | 65 | +10 | 13.7% |
| California Physicians' Service | 49 | +2 | 10.3% |
| Elevance Health, Inc. | 17 | −10 | 3.6% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 302 beneficiaries in Lassen County were assigned to 38 Medicare Shared Savings Program ACOs, 7.9% of assignable Original Medicare beneficiaries. Together, roughly 16% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.