Medicare Advantage in Garvin County, Oklahoma
2,690 people in Garvin County, Oklahoma were enrolled in Medicare Advantage in October 2026, 41.5% of 6,487 eligible beneficiaries (+1.0 pts since October 2025). Humana Inc. is the largest parent organization with 45% of reported enrollment; 7 parent organizations have 11 or more members and the HHI is 3,202 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 64 members here are in plans that terminate or leave the county, and Health Care Service Corporation, Centene Corporation leave. MA plans offered go from 33 to 27.
Parent organizations in Garvin County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 1,187 | +381 | 44.7% |
| UnitedHealth Group, Inc. | 830 | −281 | 31.3% |
| MHH Healthcare, L.P. | 335 | +24 | 12.6% |
| CVS Health Corporation | 208 | −16 | 7.8% |
| Health Care Service Corporation | 51 | −2 | 1.9% |
| Centene Corporation | 30 | −19 | 1.1% |
| St Francis Health System & St John Health System | 14 | new | 0.5% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 655 beneficiaries in Garvin County were assigned to 14 Medicare Shared Savings Program ACOs, 24.4% of assignable Original Medicare beneficiaries. Together, roughly 56% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.