Medicare Advantage in Waller County, Texas
4,756 people in Waller County, Texas were enrolled in Medicare Advantage in October 2026, 51.2% of 9,280 eligible beneficiaries (−0.9 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 30% of reported enrollment; 8 parent organizations have 11 or more members and the HHI is 1,976 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 772 members here are in plans that terminate or leave the county, and Memorial Hermann Health System leaves. MA plans offered go from 34 to 25.
Parent organizations in Waller County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 1,425 | −82 | 30.3% |
| Health Care Service Corporation | 979 | −41 | 20.8% |
| CVS Health Corporation | 889 | −72 | 18.9% |
| Humana Inc. | 576 | +179 | 12.2% |
| Centene Corporation | 436 | −62 | 9.3% |
| Devoted Health, Inc. | 248 | +95 | 5.3% |
| Elevance Health, Inc. | 120 | +56 | 2.5% |
| Memorial Hermann Health System | 34 | +7 | 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, 1,101 beneficiaries in Waller County were assigned to 38 Medicare Shared Savings Program ACOs, 40.6% of assignable Original Medicare beneficiaries. Together, roughly 71% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.