Medicare Advantage in Jefferson County, Texas
27,843 people in Jefferson County, Texas were enrolled in Medicare Advantage in October 2026, 60.0% of 46,434 eligible beneficiaries (−0.01 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 27% of reported enrollment; 12 parent organizations have 11 or more members and the HHI is 1,893 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 2,335 members here are in plans that terminate or leave the county, and CHRISTUS Health leaves. MA plans offered go from 52 to 38.
Parent organizations in Jefferson County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 7,620 | −913 | 27.4% |
| Humana Inc. | 7,034 | +1,603 | 25.3% |
| Centene Corporation | 4,015 | −626 | 14.5% |
| Health Care Service Corporation | 3,384 | −379 | 12.2% |
| CVS Health Corporation | 2,664 | −287 | 9.6% |
| Elevance Health, Inc. | 1,413 | +362 | 5.1% |
| Devoted Health, Inc. | 1,296 | +659 | 4.7% |
| Molina Healthcare, Inc. | 131 | +5 | 0.5% |
| Highmark Health | 60 | 0 | 0.2% |
| Regency ISNP Holdings LLC | 58 | −11 | 0.2% |
| First Sacramento Capital Funding LLC | 51 | −17 | 0.2% |
| CHRISTUS Health | 34 | +11 | 0.1% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 3,048 beneficiaries in Jefferson County were assigned to 58 Medicare Shared Savings Program ACOs, 25.1% of assignable Original Medicare beneficiaries. Together, roughly 70% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.