Medicare Advantage in Brazoria County, Texas
38,161 people in Brazoria County, Texas were enrolled in Medicare Advantage in October 2026, 57.2% of 66,709 eligible beneficiaries (+0.3 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 40% of reported enrollment; 12 parent organizations have 11 or more members and the HHI is 2,375 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 7,267 members here are in plans that terminate or leave the county, and Centene Corporation, Memorial Hermann Health System leave. MA plans offered go from 43 to 35.
Parent organizations in Brazoria County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 15,121 | −133 | 39.7% |
| CVS Health Corporation | 6,639 | −354 | 17.5% |
| Health Care Service Corporation | 6,456 | +439 | 17.0% |
| Humana Inc. | 4,635 | +1,025 | 12.2% |
| Centene Corporation | 2,260 | −179 | 5.9% |
| Devoted Health, Inc. | 1,295 | +524 | 3.4% |
| Elevance Health, Inc. | 730 | +261 | 1.9% |
| Memorial Hermann Health System | 724 | +93 | 1.9% |
| First Sacramento Capital Funding LLC | 64 | +6 | 0.2% |
| Molina Healthcare, Inc. | 60 | +9 | 0.2% |
| Harris County Hospital District | 37 | +21 | under 0.1% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 22 | +1 | 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, 5,557 beneficiaries in Brazoria County were assigned to 86 Medicare Shared Savings Program ACOs, 31.9% 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.