Medicare Advantage in Ionia County, Michigan
10,202 people in Ionia County, Michigan were enrolled in Medicare Advantage in October 2026, 74.3% of 13,722 eligible beneficiaries (+1.3 pts since October 2025). Blue Cross Blue Shield of Michigan Mutual Ins. Co. is the largest parent organization with 41% of reported enrollment; 9 parent organizations have 11 or more members and the HHI is 3,166 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 331 members here are in plans that terminate or leave the county. MA plans offered go from 52 to 49.
Parent organizations in Ionia County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 4,137 | −395 | 40.7% |
| Corewell Health | 3,504 | +536 | 34.5% |
| Humana Inc. | 1,769 | +253 | 17.4% |
| CVS Health Corporation | 413 | +99 | 4.1% |
| Henry Ford Health System | 215 | +162 | 2.1% |
| Trinity Health Corporation | 61 | new | 0.6% |
| Care Resources | 27 | +14 | 0.3% |
| McLaren Health Care Corporation | 22 | −9 | 0.2% |
| UnitedHealth Group, Inc. | 21 | −5 | 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, 2,021 beneficiaries in Ionia County were assigned to 21 Medicare Shared Savings Program ACOs, 74.2% of assignable Original Medicare beneficiaries. Together, roughly 93% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.