Medicare Advantage in DuPage County, Illinois
71,154 people in DuPage County, Illinois were enrolled in Medicare Advantage in October 2026, 37.8% of 188,257 eligible beneficiaries (−0.3 pts since October 2025). Humana Inc. is the largest parent organization with 43% of reported enrollment; 14 parent organizations have 11 or more members and the HHI is 2,900 (highly concentrated). For 2027, 4,423 members here are in plans that terminate or leave the county. MA plans offered go from 54 to 44.
Parent organizations in DuPage County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 30,293 | +5,984 | 42.7% |
| CVS Health Corporation | 18,192 | −2,059 | 25.6% |
| UnitedHealth Group, Inc. | 12,781 | −64 | 18.0% |
| Health Care Service Corporation | 6,916 | −2,801 | 9.7% |
| Devoted Health, Inc. | 750 | +283 | 1.1% |
| Centene Corporation | 697 | −146 | 1.0% |
| Lumeris Group Holdings Corporation | 341 | +232 | 0.5% |
| Zing Health Consolidator, Inc | 328 | +66 | 0.5% |
| Molina Healthcare, Inc. | 247 | +48 | 0.3% |
| Rifkin Managed Care Holding, LLC | 130 | +5 | 0.2% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 97 | −2 | 0.1% |
| Longevity Health Founders, LLC | 91 | −61 | 0.1% |
| Elevance Health, Inc. | 63 | −2 | under 0.1% |
| Union Health Services, Inc. | 58 | +2 | under 0.1% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 29,122 beneficiaries in DuPage County were assigned to 169 Medicare Shared Savings Program ACOs, 36.1% of assignable Original Medicare beneficiaries. Together, roughly 60% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.