Medicare Advantage in Delaware County, Oklahoma
5,536 people in Delaware County, Oklahoma were enrolled in Medicare Advantage in October 2026, 47.0% of 11,775 eligible beneficiaries (+0.6 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 50% of reported enrollment; 7 parent organizations have 11 or more members and the HHI is 4,186 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 680 members here are in plans that terminate or leave the county, and Centene Corporation leaves. MA plans offered go from 22 to 19.
Parent organizations in Delaware County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 2,767 | −737 | 50.3% |
| Humana Inc. | 2,212 | +950 | 40.2% |
| CVS Health Corporation | 236 | −100 | 4.3% |
| St Francis Health System & St John Health System | 190 | +79 | 3.5% |
| Centene Corporation | 61 | −57 | 1.1% |
| Elevance Health, Inc. | 17 | +5 | 0.3% |
| Health Care Service Corporation | 13 | 0 | 0.2% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 2,453 beneficiaries in Delaware County were assigned to 34 Medicare Shared Savings Program ACOs, 50.2% of assignable Original Medicare beneficiaries. Together, roughly 74% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.