Medicare Advantage in Lake County, Michigan
3,065 people in Lake County, Michigan were enrolled in Medicare Advantage in October 2026, 68.2% of 4,491 eligible beneficiaries (+0.2 pts since October 2025). Corewell Health is the largest parent organization with 35% of reported enrollment; 11 parent organizations have 11 or more members and the HHI is 2,249 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 1,049 members here are in plans that terminate or leave the county. MA plans offered go from 49 to 45.
Parent organizations in Lake County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Corewell Health | 1,074 | +161 | 35.2% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 624 | −294 | 20.5% |
| Humana Inc. | 613 | +90 | 20.1% |
| UnitedHealth Group, Inc. | 361 | −16 | 11.8% |
| CVS Health Corporation | 172 | +36 | 5.6% |
| Henry Ford Health System | 72 | new | 2.4% |
| Centene Corporation | 50 | +9 | 1.6% |
| Trinity Health Corporation | 29 | +18 | 1.0% |
| Molina Healthcare, Inc. | 25 | −3 | 0.8% |
| McLaren Health Care Corporation | 14 | −8 | 0.5% |
| Community PACE at Home, Inc | 13 | new | 0.4% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 566 beneficiaries in Lake County were assigned to 21 Medicare Shared Savings Program ACOs, 55.4% of assignable Original Medicare beneficiaries. Together, roughly 86% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.