Medicare Advantage in Kay County, Oklahoma
3,883 people in Kay County, Oklahoma were enrolled in Medicare Advantage in October 2026, 36.4% of 10,659 eligible beneficiaries (+0.4 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 55% of reported enrollment; 6 parent organizations have 11 or more members and the HHI is 4,396 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 390 members here are in plans that terminate or leave the county, and Health Care Service Corporation, Centene Corporation leave. MA plans offered go from 22 to 12.
Parent organizations in Kay County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 2,119 | −458 | 55.0% |
| Humana Inc. | 1,414 | +616 | 36.7% |
| CVS Health Corporation | 140 | −23 | 3.6% |
| Health Care Service Corporation | 125 | −64 | 3.2% |
| Centene Corporation | 42 | −17 | 1.1% |
| Elevance Health, Inc. | 13 | new | 0.3% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 1,346 beneficiaries in Kay County were assigned to 30 Medicare Shared Savings Program ACOs, 27.7% of assignable Original Medicare beneficiaries. Together, roughly 54% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.