Medicare Advantage in Mackinac County, Michigan
2,247 people in Mackinac County, Michigan were enrolled in Medicare Advantage in October 2026, 56.9% of 3,948 eligible beneficiaries (−2.0 pts since October 2025). Blue Cross Blue Shield of Michigan Mutual Ins. Co. is the largest parent organization with 62% of reported enrollment; 6 parent organizations have 11 or more members and the HHI is 4,774 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 494 members here are in plans that terminate or leave the county. MA plans offered go from 11 to 10.
Parent organizations in Mackinac County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 1,364 | −218 | 61.6% |
| Humana Inc. | 687 | +215 | 31.0% |
| DLP Marquette Health Plan, LLC | 89 | new | 4.0% |
| UnitedHealth Group, Inc. | 31 | −6 | 1.4% |
| CVS Health Corporation | 29 | −1 | 1.3% |
| Highmark Health | 15 | −1 | 0.7% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 576 beneficiaries in Mackinac County were assigned to 25 Medicare Shared Savings Program ACOs, 47.0% 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.