Medicare Advantage in Aransas County, Texas
5,109 people in Aransas County, Texas were enrolled in Medicare Advantage in October 2026, 57.4% of 8,895 eligible beneficiaries (+0.7 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 45% of reported enrollment; 8 parent organizations have 11 or more members and the HHI is 3,796 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 554 members here are in plans that terminate or leave the county, and CHRISTUS Health leaves. MA plans offered go from 37 to 26.
Parent organizations in Aransas County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 2,266 | −48 | 44.8% |
| Humana Inc. | 2,100 | +238 | 41.5% |
| CVS Health Corporation | 297 | −36 | 5.9% |
| Health Care Service Corporation | 280 | +51 | 5.5% |
| Regency ISNP Holdings LLC | 47 | +34 | 0.9% |
| Centene Corporation | 30 | −53 | 0.6% |
| Elevance Health, Inc. | 21 | +10 | 0.4% |
| CHRISTUS Health | 18 | +6 | 0.4% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 404 beneficiaries in Aransas County were assigned to 68 Medicare Shared Savings Program ACOs, 15.5% of assignable Original Medicare beneficiaries. Together, roughly 64% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.