Medicare Advantage in Eaton County, Michigan
19,268 people in Eaton County, Michigan were enrolled in Medicare Advantage in October 2026, 72.0% of 26,761 eligible beneficiaries (−0.3 pts since October 2025). Blue Cross Blue Shield of Michigan Mutual Ins. Co. is the largest parent organization with 55% of reported enrollment; 10 parent organizations have 11 or more members and the HHI is 3,695 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 42 members here are in plans that terminate or leave the county. MA plans offered go from 51 to 49.
Parent organizations in Eaton County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 10,543 | −1,009 | 54.8% |
| Humana Inc. | 4,547 | +913 | 23.6% |
| Corewell Health | 1,823 | +832 | 9.5% |
| CVS Health Corporation | 1,026 | +142 | 5.3% |
| Henry Ford Health System | 644 | +521 | 3.3% |
| UnitedHealth Group, Inc. | 246 | +94 | 1.3% |
| McLaren Health Care Corporation | 199 | +43 | 1.0% |
| Trinity Health Corporation | 85 | new | 0.4% |
| Centene Corporation | 78 | +1 | 0.4% |
| Volunteers of America National Services | 45 | −9 | 0.2% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 3,288 beneficiaries in Eaton County were assigned to 52 Medicare Shared Savings Program ACOs, 58.5% of assignable Original Medicare beneficiaries. Together, roughly 88% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.