Medicare Advantage in Douglas County, Illinois
2,179 people in Douglas County, Illinois were enrolled in Medicare Advantage in October 2026, 51.1% of 4,265 eligible beneficiaries (−0.8 pts since October 2025). CVS Health Corporation is the largest parent organization with 77% of reported enrollment; 6 parent organizations have 11 or more members and the HHI is 6,033 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 0 members here are in plans that terminate or leave the county. MA plans offered go from 21 to 22.
Parent organizations in Douglas County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| CVS Health Corporation | 1,636 | +650 | 76.6% |
| Humana Inc. | 218 | +70 | 10.2% |
| Centene Corporation | 113 | −14 | 5.3% |
| UnitedHealth Group, Inc. | 100 | +10 | 4.7% |
| Molina Healthcare, Inc. | 54 | −8 | 2.5% |
| UMWA Health and Retirement Funds | 14 | −2 | 0.7% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 1,274 beneficiaries in Douglas County were assigned to 13 Medicare Shared Savings Program ACOs, 77.9% of assignable Original Medicare beneficiaries. Together, roughly 89% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.