Medicare Advantage in Greene County, Tennessee
13,052 people in Greene County, Tennessee were enrolled in Medicare Advantage in October 2026, 60.9% of 21,416 eligible beneficiaries (+0.1 pts since October 2025). Humana Inc. is the largest parent organization with 40% of reported enrollment; 9 parent organizations have 11 or more members and the HHI is 3,265 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 625 members here are in plans that terminate or leave the county, and Centene Corporation leaves. MA plans offered go from 27 to 27.
Parent organizations in Greene County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 5,249 | +240 | 40.4% |
| UnitedHealth Group, Inc. | 4,402 | −283 | 33.9% |
| BlueCross BlueShield of Tennessee | 2,838 | +376 | 21.9% |
| Elevance Health, Inc. | 202 | +3 | 1.6% |
| CVS Health Corporation | 127 | +8 | 1.0% |
| Centene Corporation | 85 | −6 | 0.7% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 46 | −2 | 0.4% |
| BrightSpring Health Services, Inc. | 25 | +5 | 0.2% |
| UMWA Health and Retirement Funds | 11 | −3 | under 0.1% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 940 beneficiaries in Greene County were assigned to 56 Medicare Shared Savings Program ACOs, 16.5% of assignable Original Medicare beneficiaries. Together, roughly 67% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.