Medicare Advantage in Jefferson County, Mississippi
1,047 people in Jefferson County, Mississippi were enrolled in Medicare Advantage in October 2026, 57.4% of 1,823 eligible beneficiaries (+0.6 pts since October 2025). Humana Inc. is the largest parent organization with 49% of reported enrollment; 3 parent organizations have 11 or more members and the HHI is 4,493 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 42 members here are in plans that terminate or leave the county, and CVS Health Corporation leaves. MA plans offered go from 17 to 17.
Parent organizations in Jefferson County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 507 | +17 | 49.2% |
| UnitedHealth Group, Inc. | 465 | +51 | 45.1% |
| CVS Health Corporation | 58 | −4 | 5.6% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 256 beneficiaries in Jefferson County were assigned to 9 Medicare Shared Savings Program ACOs, 44.9% of assignable Original Medicare beneficiaries. Together, roughly 77% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.