Medicare Advantage in Kalamazoo County, Michigan
36,486 people in Kalamazoo County, Michigan were enrolled in Medicare Advantage in October 2026, 65.7% of 55,504 eligible beneficiaries (−0.5 pts since October 2025). Corewell Health is the largest parent organization with 36% of reported enrollment; 11 parent organizations have 11 or more members and the HHI is 2,426 (highly concentrated). For 2027, 1,465 members here are in plans that terminate or leave the county. MA plans offered go from 51 to 49.
Parent organizations in Kalamazoo County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Corewell Health | 13,231 | +1,240 | 36.4% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 9,989 | −798 | 27.5% |
| Humana Inc. | 4,963 | +1,737 | 13.6% |
| UnitedHealth Group, Inc. | 3,632 | −2,352 | 10.0% |
| CVS Health Corporation | 2,535 | +290 | 7.0% |
| Centene Corporation | 1,262 | +35 | 3.5% |
| Comprehensive Senior Care Corporation | 357 | +18 | 1.0% |
| Henry Ford Health System | 335 | +236 | 0.9% |
| Curana Health Holdings, LLC | 33 | +2 | under 0.1% |
| Elevance Health, Inc. | 24 | 0 | under 0.1% |
| Molina Healthcare, Inc. | 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, 821 beneficiaries in Kalamazoo County were assigned to 108 Medicare Shared Savings Program ACOs, 6.5% of assignable Original Medicare beneficiaries. Together, roughly 68% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.