Medicare Advantage in Decatur County, Tennessee
1,779 people in Decatur County, Tennessee were enrolled in Medicare Advantage in October 2026, 47.3% of 3,760 eligible beneficiaries (+1.3 pts since October 2025). BlueCross BlueShield of Tennessee is the largest parent organization with 42% of reported enrollment; 8 parent organizations have 11 or more members and the HHI is 2,979 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 95 members here are in plans that terminate or leave the county, and Centene Corporation leaves. MA plans offered go from 34 to 31.
Parent organizations in Decatur County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| BlueCross BlueShield of Tennessee | 739 | +35 | 42.4% |
| UnitedHealth Group, Inc. | 533 | +80 | 30.6% |
| Humana Inc. | 237 | +13 | 13.6% |
| Health Care Service Corporation | 110 | −2 | 6.3% |
| Elevance Health, Inc. | 66 | −25 | 3.8% |
| Centene Corporation | 26 | 0 | 1.5% |
| CVS Health Corporation | 19 | −2 | 1.1% |
| Mitchell Family Office | 12 | −8 | 0.7% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 689 beneficiaries in Decatur County were assigned to 21 Medicare Shared Savings Program ACOs, 46.9% of assignable Original Medicare beneficiaries. Together, roughly 72% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.