Medicare Advantage in Galveston County, Texas
39,870 people in Galveston County, Texas were enrolled in Medicare Advantage in October 2026, 56.1% of 71,122 eligible beneficiaries (−0.01 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 35% of reported enrollment; 13 parent organizations have 11 or more members and the HHI is 2,253 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 9,724 members here are in plans that terminate or leave the county, and Centene Corporation, Memorial Hermann Health System leave. MA plans offered go from 46 to 33.
Parent organizations in Galveston County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 13,961 | −402 | 35.1% |
| Health Care Service Corporation | 9,240 | +349 | 23.2% |
| Humana Inc. | 7,116 | +1,479 | 17.9% |
| Centene Corporation | 3,569 | −637 | 9.0% |
| CVS Health Corporation | 3,124 | −61 | 7.9% |
| Devoted Health, Inc. | 1,113 | +478 | 2.8% |
| Elevance Health, Inc. | 1,051 | +256 | 2.6% |
| Memorial Hermann Health System | 447 | +63 | 1.1% |
| Molina Healthcare, Inc. | 51 | −1 | 0.1% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 25 | 0 | under 0.1% |
| Harris County Hospital District | 23 | new | under 0.1% |
| First Sacramento Capital Funding LLC | 16 | −18 | under 0.1% |
| Consolidated Assoc of Railroad Employees HC | 15 | −2 | under 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, 3,516 beneficiaries in Galveston County were assigned to 122 Medicare Shared Savings Program ACOs, 17.9% 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.