Medicare Advantage in Allegan County, Michigan
20,411 people in Allegan County, Michigan were enrolled in Medicare Advantage in October 2026, 71.7% of 28,475 eligible beneficiaries (−0.6 pts since October 2025). Corewell Health is the largest parent organization with 59% of reported enrollment; 13 parent organizations have 11 or more members and the HHI is 4,064 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 1,133 members here are in plans that terminate or leave the county. MA plans offered go from 52 to 50.
Parent organizations in Allegan County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Corewell Health | 12,050 | +673 | 59.2% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 3,982 | −500 | 19.6% |
| Humana Inc. | 2,416 | +661 | 11.9% |
| UnitedHealth Group, Inc. | 1,127 | −51 | 5.5% |
| CVS Health Corporation | 281 | −585 | 1.4% |
| Centene Corporation | 162 | +64 | 0.8% |
| Henry Ford Health System | 150 | +97 | 0.7% |
| Curana Health Holdings, LLC | 85 | +17 | 0.4% |
| LifeCircles | 37 | +6 | 0.2% |
| Comprehensive Senior Care Corporation | 17 | −1 | under 0.1% |
| Health Care Service Corporation | 16 | −1 | under 0.1% |
| Molina Healthcare, Inc. | 16 | −7 | under 0.1% |
| Care Resources | 11 | new | under 0.1% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 1,422 beneficiaries in Allegan County were assigned to 64 Medicare Shared Savings Program ACOs, 28.5% of assignable Original Medicare beneficiaries. Together, roughly 80% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.