Medicare Advantage in Macomb County, Michigan
120,826 people in Macomb County, Michigan were enrolled in Medicare Advantage in October 2026, 60.3% of 200,252 eligible beneficiaries (+0.5 pts since October 2025). Blue Cross Blue Shield of Michigan Mutual Ins. Co. is the largest parent organization with 39% of reported enrollment; 15 parent organizations have 11 or more members and the HHI is 2,313 (highly concentrated). For 2027, 1,630 members here are in plans that terminate or leave the county. MA plans offered go from 66 to 59.
Parent organizations in Macomb County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 47,109 | −5,504 | 39.1% |
| Humana Inc. | 21,243 | +2,494 | 17.6% |
| Henry Ford Health System | 20,802 | +5,805 | 17.3% |
| CVS Health Corporation | 12,577 | −304 | 10.4% |
| Corewell Health | 8,731 | +709 | 7.2% |
| Centene Corporation | 3,478 | −538 | 2.9% |
| UnitedHealth Group, Inc. | 2,010 | +563 | 1.7% |
| Molina Healthcare, Inc. | 1,745 | −491 | 1.4% |
| Zing Health Consolidator, Inc | 1,695 | +629 | 1.4% |
| Independence Health Group, Inc. | 441 | −177 | 0.4% |
| Longevity Health Founders, LLC | 222 | −1 | 0.2% |
| Curana Health Holdings, LLC | 173 | +42 | 0.1% |
| Trinity Health Corporation | 135 | new | 0.1% |
| McLaren Health Care Corporation | 120 | −45 | under 0.1% |
| Elevance Health, Inc. | 51 | −1 | 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, 33,253 beneficiaries in Macomb County were assigned to 129 Medicare Shared Savings Program ACOs, 54.3% of assignable Original Medicare beneficiaries. Together, roughly 82% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.