Medicare Advantage in Jefferson County, Indiana
3,583 people in Jefferson County, Indiana were enrolled in Medicare Advantage in October 2026, 43.5% of 8,244 eligible beneficiaries (−0.1 pts since October 2025). Humana Inc. is the largest parent organization with 35% of reported enrollment; 9 parent organizations have 11 or more members and the HHI is 2,426 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 988 members here are in plans that terminate or leave the county. MA plans offered go from 30 to 21.
Parent organizations in Jefferson County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 1,230 | +436 | 34.6% |
| UnitedHealth Group, Inc. | 1,018 | +120 | 28.6% |
| Elevance Health, Inc. | 611 | −758 | 17.2% |
| Centene Corporation | 277 | +190 | 7.8% |
| CVS Health Corporation | 243 | −79 | 6.8% |
| Devoted Health, Inc. | 107 | new | 3.0% |
| Rifkin Managed Care Holding, LLC | 27 | new | 0.8% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 23 | −1 | 0.6% |
| Lumeris Group Holdings Corporation | 22 | new | 0.6% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 435 beneficiaries in Jefferson County were assigned to 31 Medicare Shared Savings Program ACOs, 11.9% of assignable Original Medicare beneficiaries. Together, roughly 50% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.