Medicare Advantage in Brown County, Illinois
419 people in Brown County, Illinois were enrolled in Medicare Advantage in October 2026, 36.6% of 1,144 eligible beneficiaries (+1.0 pts since October 2025). CVS Health Corporation is the largest parent organization with 67% of reported enrollment; 4 parent organizations have 11 or more members and the HHI is 5,025 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 60 members here are in plans that terminate or leave the county. MA plans offered go from 26 to 15.
Parent organizations in Brown County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| CVS Health Corporation | 241 | +19 | 66.9% |
| UnitedHealth Group, Inc. | 79 | −19 | 21.9% |
| Centene Corporation | 20 | +9 | 5.6% |
| Humana Inc. | 20 | −8 | 5.6% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 463 beneficiaries in Brown County were assigned to 10 Medicare Shared Savings Program ACOs, 75.3% of assignable Original Medicare beneficiaries. Together, roughly 84% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.