Medicare Advantage in Rockwall County, Texas
9,389 people in Rockwall County, Texas were enrolled in Medicare Advantage in October 2026, 43.4% of 21,634 eligible beneficiaries (+0.4 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 63% of reported enrollment; 10 parent organizations have 11 or more members and the HHI is 4,494 (highly concentrated). For 2027, 982 members here are in plans that terminate or leave the county, and Health Care Service Corporation leaves. MA plans offered go from 40 to 33.
Parent organizations in Rockwall County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 5,883 | +211 | 63.1% |
| Humana Inc. | 1,982 | +380 | 21.3% |
| CVS Health Corporation | 440 | −32 | 4.7% |
| Health Care Service Corporation | 413 | −45 | 4.4% |
| Baylor Scott & White Health | 293 | +76 | 3.1% |
| Centene Corporation | 152 | −64 | 1.6% |
| Elevance Health, Inc. | 95 | +24 | 1.0% |
| Rifkin Managed Care Holding, LLC | 22 | −5 | 0.2% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 19 | −1 | 0.2% |
| Molina Healthcare, Inc. | 19 | −2 | 0.2% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 2,426 beneficiaries in Rockwall County were assigned to 60 Medicare Shared Savings Program ACOs, 28.7% of assignable Original Medicare beneficiaries. Together, roughly 60% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.