Medicare Advantage in Glenn County, California
399 people in Glenn County, California were enrolled in Medicare Advantage in October 2026, 6.5% of 6,160 eligible beneficiaries (−4.0 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 43% of reported enrollment; 5 parent organizations have 11 or more members and the HHI is 3,035 (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 Glenn County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 165 | +7 | 42.9% |
| Imperial Health Plan of California | 108 | +70 | 28.1% |
| California Physicians' Service | 73 | +6 | 19.0% |
| Elevance Health, Inc. | 22 | −183 | 5.7% |
| CVS Health Corporation | 17 | −135 | 4.4% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 936 beneficiaries in Glenn County were assigned to 23 Medicare Shared Savings Program ACOs, 21.6% of assignable Original Medicare beneficiaries. Together, roughly 27% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.