Medicare Advantage in DeKalb County, Illinois
8,030 people in DeKalb County, Illinois were enrolled in Medicare Advantage in October 2026, 42.5% of 18,890 eligible beneficiaries (+0.3 pts since October 2025). CVS Health Corporation is the largest parent organization with 50% of reported enrollment; 7 parent organizations have 11 or more members and the HHI is 3,534 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 347 members here are in plans that terminate or leave the county, and Health Care Service Corporation leaves. MA plans offered go from 29 to 22.
Parent organizations in DeKalb County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| CVS Health Corporation | 4,026 | +46 | 50.3% |
| Humana Inc. | 2,211 | +620 | 27.6% |
| UnitedHealth Group, Inc. | 1,184 | −102 | 14.8% |
| Health Care Service Corporation | 328 | −293 | 4.1% |
| Zing Health Consolidator, Inc | 125 | +68 | 1.6% |
| Centene Corporation | 80 | −25 | 1.0% |
| Molina Healthcare, Inc. | 48 | +18 | 0.6% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 5,121 beneficiaries in DeKalb County were assigned to 54 Medicare Shared Savings Program ACOs, 62.8% of assignable Original Medicare beneficiaries. Together, roughly 79% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.