Medicare Advantage in Sanilac County, Michigan
6,944 people in Sanilac County, Michigan were enrolled in Medicare Advantage in October 2026, 59.0% of 11,769 eligible beneficiaries (+1.2 pts since October 2025). Blue Cross Blue Shield of Michigan Mutual Ins. Co. is the largest parent organization with 34% of reported enrollment; 9 parent organizations have 11 or more members and the HHI is 2,235 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 656 members here are in plans that terminate or leave the county. MA plans offered go from 49 to 46.
Parent organizations in Sanilac County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 2,366 | −1,088 | 34.2% |
| Humana Inc. | 1,682 | +229 | 24.3% |
| Henry Ford Health System | 1,141 | +752 | 16.5% |
| Corewell Health | 744 | +327 | 10.8% |
| UnitedHealth Group, Inc. | 521 | −19 | 7.5% |
| CVS Health Corporation | 333 | +50 | 4.8% |
| Centene Corporation | 90 | −7 | 1.3% |
| McLaren Health Care Corporation | 20 | 0 | 0.3% |
| Trinity Health Corporation | 14 | new | 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, 2,587 beneficiaries in Sanilac County were assigned to 46 Medicare Shared Savings Program ACOs, 64.0% of assignable Original Medicare beneficiaries. Together, roughly 85% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.