Medicare Advantage in Polk County, Tennessee
2,996 people in Polk County, Tennessee were enrolled in Medicare Advantage in October 2026, 64.7% of 4,632 eligible beneficiaries (+2.2 pts since October 2025). BlueCross BlueShield of Tennessee is the largest parent organization with 36% of reported enrollment; 9 parent organizations have 11 or more members and the HHI is 2,697 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 166 members here are in plans that terminate or leave the county, and Centene Corporation leaves. MA plans offered go from 39 to 36.
Parent organizations in Polk County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| BlueCross BlueShield of Tennessee | 1,084 | +121 | 36.4% |
| UnitedHealth Group, Inc. | 863 | −8 | 29.0% |
| Humana Inc. | 661 | +31 | 22.2% |
| Elevance Health, Inc. | 116 | −4 | 3.9% |
| Health Care Service Corporation | 91 | +13 | 3.1% |
| CVS Health Corporation | 65 | −6 | 2.2% |
| Devoted Health, Inc. | 58 | +35 | 1.9% |
| Centene Corporation | 26 | 0 | 0.9% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 11 | −1 | 0.4% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 417 beneficiaries in Polk County were assigned to 30 Medicare Shared Savings Program ACOs, 26.8% 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.