Medicare Advantage in Effingham County, Illinois
2,379 people in Effingham County, Illinois were enrolled in Medicare Advantage in October 2026, 27.8% of 8,552 eligible beneficiaries (+1.1 pts since October 2025). CVS Health Corporation is the largest parent organization with 68% of reported enrollment; 6 parent organizations have 11 or more members and the HHI is 4,916 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 32 members here are in plans that terminate or leave the county, and Health Care Service Corporation leaves. MA plans offered go from 18 to 13.
Parent organizations in Effingham County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| CVS Health Corporation | 1,601 | +195 | 67.8% |
| Humana Inc. | 333 | +86 | 14.1% |
| UnitedHealth Group, Inc. | 222 | +26 | 9.4% |
| Centene Corporation | 109 | −15 | 4.6% |
| Molina Healthcare, Inc. | 64 | −11 | 2.7% |
| Health Care Service Corporation | 32 | +7 | 1.4% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 3,723 beneficiaries in Effingham County were assigned to 27 Medicare Shared Savings Program ACOs, 72.3% 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.