Medicare Advantage in Arenac County, Michigan
3,494 people in Arenac County, Michigan were enrolled in Medicare Advantage in October 2026, 65.8% of 5,311 eligible beneficiaries (+1.0 pts since October 2025). Blue Cross Blue Shield of Michigan Mutual Ins. Co. is the largest parent organization with 39% of reported enrollment; 8 parent organizations have 11 or more members and the HHI is 2,425 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 552 members here are in plans that terminate or leave the county. MA plans offered go from 52 to 45.
Parent organizations in Arenac County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 1,343 | −414 | 38.8% |
| Corewell Health | 653 | +232 | 18.9% |
| Humana Inc. | 577 | +69 | 16.7% |
| Henry Ford Health System | 538 | +260 | 15.5% |
| UnitedHealth Group, Inc. | 193 | −70 | 5.6% |
| CVS Health Corporation | 113 | −10 | 3.3% |
| Molina Healthcare, Inc. | 25 | +3 | 0.7% |
| Centene Corporation | 18 | −6 | 0.5% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 529 beneficiaries in Arenac County were assigned to 28 Medicare Shared Savings Program ACOs, 34.0% of assignable Original Medicare beneficiaries. Together, roughly 77% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.