Medicare Advantage in Karnes County, Texas
1,479 people in Karnes County, Texas were enrolled in Medicare Advantage in October 2026, 49.8% of 2,970 eligible beneficiaries (+0.4 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 57% of reported enrollment; 8 parent organizations have 11 or more members and the HHI is 3,686 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 68 members here are in plans that terminate or leave the county. MA plans offered go from 24 to 19.
Parent organizations in Karnes County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 821 | +157 | 56.6% |
| CVS Health Corporation | 252 | −81 | 17.4% |
| Humana Inc. | 157 | +7 | 10.8% |
| Devoted Health, Inc. | 79 | +24 | 5.4% |
| Centene Corporation | 65 | −50 | 4.5% |
| Rifkin Managed Care Holding, LLC | 36 | −7 | 2.5% |
| Elevance Health, Inc. | 28 | new | 1.9% |
| Health Care Service Corporation | 12 | −63 | 0.8% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 239 beneficiaries in Karnes County were assigned to 19 Medicare Shared Savings Program ACOs, 20.6% 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.