Medicare Advantage in Cass County, Michigan
7,503 people in Cass County, Michigan were enrolled in Medicare Advantage in October 2026, 53.7% of 13,961 eligible beneficiaries (+0.4 pts since October 2025). Humana Inc. is the largest parent organization with 42% of reported enrollment; 10 parent organizations have 11 or more members and the HHI is 2,601 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 194 members here are in plans that terminate or leave the county. MA plans offered go from 43 to 44.
Parent organizations in Cass County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 3,136 | +589 | 42.0% |
| Corewell Health | 1,404 | +216 | 18.8% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 1,314 | −156 | 17.6% |
| UnitedHealth Group, Inc. | 839 | −84 | 11.2% |
| CVS Health Corporation | 459 | −412 | 6.1% |
| Centene Corporation | 218 | −7 | 2.9% |
| Elevance Health, Inc. | 38 | +4 | 0.5% |
| Henry Ford Health System | 28 | +17 | 0.4% |
| PACE of Southwest Michigan, Inc. | 16 | −3 | 0.2% |
| Health Care Service Corporation | 14 | −3 | 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, 3,047 beneficiaries in Cass County were assigned to 56 Medicare Shared Savings Program ACOs, 65.0% of assignable Original Medicare beneficiaries. Together, roughly 84% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.