Medicare Advantage in Macoupin County, Illinois
5,279 people in Macoupin County, Illinois were enrolled in Medicare Advantage in October 2026, 44.0% of 11,992 eligible beneficiaries (+0.9 pts since October 2025). CVS Health Corporation is the largest parent organization with 42% of reported enrollment; 8 parent organizations have 11 or more members and the HHI is 3,487 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 378 members here are in plans that terminate or leave the county. MA plans offered go from 37 to 26.
Parent organizations in Macoupin County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| CVS Health Corporation | 2,211 | −97 | 42.4% |
| UnitedHealth Group, Inc. | 2,071 | +79 | 39.7% |
| Humana Inc. | 515 | +171 | 9.9% |
| Centene Corporation | 143 | −8 | 2.7% |
| Lumeris Group Holdings Corporation | 101 | +29 | 1.9% |
| Molina Healthcare, Inc. | 86 | +3 | 1.6% |
| Devoted Health, Inc. | 75 | +58 | 1.4% |
| Health Care Service Corporation | 14 | −25 | 0.3% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 3,755 beneficiaries in Macoupin County were assigned to 35 Medicare Shared Savings Program ACOs, 63.9% 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.