Medicare Advantage in Starr County, Texas
9,013 people in Starr County, Texas were enrolled in Medicare Advantage in October 2026, 84.5% of 10,665 eligible beneficiaries (+1.9 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 41% of reported enrollment; 7 parent organizations have 11 or more members and the HHI is 2,757 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 3,552 members here are in plans that terminate or leave the county. MA plans offered go from 29 to 22.
Parent organizations in Starr County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 3,709 | +94 | 41.3% |
| Centene Corporation | 2,419 | −332 | 26.9% |
| Universal Health Services, Inc. | 1,182 | +426 | 13.2% |
| Humana Inc. | 960 | +285 | 10.7% |
| CVS Health Corporation | 551 | −33 | 6.1% |
| Regency ISNP Holdings LLC | 96 | −4 | 1.1% |
| Molina Healthcare, Inc. | 66 | +2 | 0.7% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 61 beneficiaries in Starr County were assigned to 10 Medicare Shared Savings Program ACOs, 5.0% of assignable Original Medicare beneficiaries. Together, roughly 85% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.