Medicare Advantage in Calhoun County, Illinois
500 people in Calhoun County, Illinois were enrolled in Medicare Advantage in October 2026, 39.2% of 1,276 eligible beneficiaries (+0.5 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 46% of reported enrollment; 4 parent organizations have 11 or more members and the HHI is 3,675 (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 37 to 33.
Parent organizations in Calhoun County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 206 | +33 | 45.8% |
| CVS Health Corporation | 169 | −40 | 37.6% |
| Humana Inc. | 55 | +19 | 12.2% |
| Elevance Health, Inc. | 20 | 0 | 4.4% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 566 beneficiaries in Calhoun County were assigned to 13 Medicare Shared Savings Program ACOs, 83.2% of assignable Original Medicare beneficiaries. Together, roughly 90% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.