Medicare Advantage in Franklin County, Illinois
4,097 people in Franklin County, Illinois were enrolled in Medicare Advantage in October 2026, 41.8% of 9,792 eligible beneficiaries (+1.1 pts since October 2025). CVS Health Corporation is the largest parent organization with 40% of reported enrollment; 7 parent organizations have 11 or more members and the HHI is 2,368 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 487 members here are in plans that terminate or leave the county, and Health Care Service Corporation leaves. MA plans offered go from 21 to 13.
Parent organizations in Franklin County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| CVS Health Corporation | 1,612 | +234 | 39.8% |
| UMWA Health and Retirement Funds | 673 | −33 | 16.6% |
| Humana Inc. | 603 | +96 | 14.9% |
| UnitedHealth Group, Inc. | 586 | +1 | 14.5% |
| Centene Corporation | 312 | +8 | 7.7% |
| Molina Healthcare, Inc. | 145 | −12 | 3.6% |
| Health Care Service Corporation | 123 | −52 | 3.0% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 2,353 beneficiaries in Franklin County were assigned to 33 Medicare Shared Savings Program ACOs, 45.1% 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.