Medicare Advantage in Johnson County, Tennessee
3,587 people in Johnson County, Tennessee were enrolled in Medicare Advantage in October 2026, 65.2% of 5,499 eligible beneficiaries (+0.5 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 64% of reported enrollment; 9 parent organizations have 11 or more members and the HHI is 4,529 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 196 members here are in plans that terminate or leave the county, and Centene Corporation leaves. MA plans offered go from 30 to 32.
Parent organizations in Johnson County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 2,271 | −102 | 63.8% |
| Humana Inc. | 544 | +39 | 15.3% |
| BlueCross BlueShield of Tennessee | 525 | +88 | 14.7% |
| Elevance Health, Inc. | 73 | +1 | 2.1% |
| Devoted Health, Inc. | 55 | +21 | 1.5% |
| CVS Health Corporation | 37 | +1 | 1.0% |
| Centene Corporation | 27 | −6 | 0.8% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 16 | 0 | 0.4% |
| BrightSpring Health Services, Inc. | 12 | 0 | 0.3% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 289 beneficiaries in Johnson County were assigned to 31 Medicare Shared Savings Program ACOs, 20.6% 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.