Medicare Advantage in Callahan County, Texas
1,610 people in Callahan County, Texas were enrolled in Medicare Advantage in October 2026, 41.5% of 3,879 eligible beneficiaries (−0.4 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 45% of reported enrollment; 5 parent organizations have 11 or more members and the HHI is 4,020 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 41 members here are in plans that terminate or leave the county. MA plans offered go from 11 to 10.
Parent organizations in Callahan County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 707 | −160 | 44.6% |
| Humana Inc. | 706 | +148 | 44.6% |
| Elevance Health, Inc. | 74 | +41 | 4.7% |
| CVS Health Corporation | 55 | +1 | 3.5% |
| Centene Corporation | 42 | +1 | 2.7% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 224 beneficiaries in Callahan County were assigned to 15 Medicare Shared Savings Program ACOs, 14.2% of assignable Original Medicare beneficiaries. Together, roughly 50% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.