Medicare Advantage in Carter County, Tennessee
10,456 people in Carter County, Tennessee were enrolled in Medicare Advantage in October 2026, 66.5% of 15,723 eligible beneficiaries (−0.3 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 61% of reported enrollment; 7 parent organizations have 11 or more members and the HHI is 4,371 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 462 members here are in plans that terminate or leave the county, and Centene Corporation leaves. MA plans offered go from 27 to 30.
Parent organizations in Carter County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 6,353 | −652 | 61.0% |
| Humana Inc. | 1,943 | +357 | 18.7% |
| BlueCross BlueShield of Tennessee | 1,785 | +362 | 17.1% |
| Elevance Health, Inc. | 184 | −2 | 1.8% |
| Centene Corporation | 62 | −1 | 0.6% |
| CVS Health Corporation | 57 | −4 | 0.5% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 25 | −4 | 0.2% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 733 beneficiaries in Carter County were assigned to 42 Medicare Shared Savings Program ACOs, 22.1% of assignable Original Medicare beneficiaries. Together, roughly 74% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.