Medicare Advantage in Zapata County, Texas
1,638 people in Zapata County, Texas were enrolled in Medicare Advantage in October 2026, 74.9% of 2,188 eligible beneficiaries (+2.6 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 52% of reported enrollment; 5 parent organizations have 11 or more members and the HHI is 3,604 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 581 members here are in plans that terminate or leave the county. MA plans offered go from 25 to 19.
Parent organizations in Zapata County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 848 | +9 | 52.4% |
| Centene Corporation | 401 | −92 | 24.8% |
| Humana Inc. | 192 | +41 | 11.9% |
| Universal Health Services, Inc. | 163 | +110 | 10.1% |
| Molina Healthcare, Inc. | 14 | new | 0.9% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 28 beneficiaries in Zapata County were assigned to 13 Medicare Shared Savings Program ACOs, 6.5% of assignable Original Medicare beneficiaries. Together, roughly 76% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.