Medicare Advantage in Decatur County, Indiana
3,050 people in Decatur County, Indiana were enrolled in Medicare Advantage in October 2026, 48.0% of 6,351 eligible beneficiaries (+1.1 pts since October 2025). Humana Inc. is the largest parent organization with 41% of reported enrollment; 9 parent organizations have 11 or more members and the HHI is 3,097 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 1,114 members here are in plans that terminate or leave the county. MA plans offered go from 33 to 23.
Parent organizations in Decatur County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 1,247 | +441 | 41.4% |
| UnitedHealth Group, Inc. | 1,059 | +82 | 35.1% |
| Elevance Health, Inc. | 309 | −627 | 10.3% |
| Devoted Health, Inc. | 158 | new | 5.2% |
| Centene Corporation | 78 | +10 | 2.6% |
| SIHO Holding, Inc. | 69 | new | 2.3% |
| Rifkin Managed Care Holding, LLC | 49 | new | 1.6% |
| CVS Health Corporation | 29 | −57 | 1.0% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 15 | −1 | 0.5% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 781 beneficiaries in Decatur County were assigned to 29 Medicare Shared Savings Program ACOs, 28.8% of assignable Original Medicare beneficiaries. Together, roughly 63% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.