Medicare Advantage in Sullivan County, Indiana
2,116 people in Sullivan County, Indiana were enrolled in Medicare Advantage in October 2026, 44.1% of 4,802 eligible beneficiaries (+0.7 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 33% of reported enrollment; 7 parent organizations have 11 or more members and the HHI is 2,352 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 516 members here are in plans that terminate or leave the county. MA plans offered go from 34 to 23.
Parent organizations in Sullivan County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 693 | +20 | 33.0% |
| Humana Inc. | 639 | +216 | 30.5% |
| Elevance Health, Inc. | 288 | −291 | 13.7% |
| SIHO Holding, Inc. | 153 | +103 | 7.3% |
| CVS Health Corporation | 135 | +8 | 6.4% |
| UMWA Health and Retirement Funds | 135 | −5 | 6.4% |
| Centene Corporation | 54 | +17 | 2.6% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 1,347 beneficiaries in Sullivan County were assigned to 19 Medicare Shared Savings Program ACOs, 62.6% of assignable Original Medicare beneficiaries. Together, roughly 79% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.