Medicare Advantage in Alexander County, Illinois
720 people in Alexander County, Illinois were enrolled in Medicare Advantage in October 2026, 51.2% of 1,407 eligible beneficiaries (+2.7 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 51% of reported enrollment; 4 parent organizations have 11 or more members and the HHI is 3,834 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 47 members here are in plans that terminate or leave the county. MA plans offered go from 20 to 18.
Parent organizations in Alexander County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 356 | +22 | 51.1% |
| CVS Health Corporation | 220 | +10 | 31.6% |
| Humana Inc. | 104 | +12 | 14.9% |
| Molina Healthcare, Inc. | 17 | −1 | 2.4% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 230 beneficiaries in Alexander County were assigned to 18 Medicare Shared Savings Program ACOs, 37.1% of assignable Original Medicare beneficiaries. Together, roughly 69% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.