Medicare Advantage in Lake County, Colorado
392 people in Lake County, Colorado were enrolled in Medicare Advantage in October 2026, 34.0% of 1,152 eligible beneficiaries (+0.4 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 55% of reported enrollment; 2 parent organizations have 11 or more members and the HHI is 5,041 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 117 members here are in plans that terminate or leave the county. MA plans offered go from 7 to 7.
Parent organizations in Lake County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 204 | −67 | 54.5% |
| Humana Inc. | 170 | +67 | 45.5% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 82 beneficiaries in Lake County were assigned to 16 Medicare Shared Savings Program ACOs, 16.0% of assignable Original Medicare beneficiaries. Together, roughly 45% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.