Medicare Advantage in Marion County, Tennessee
4,590 people in Marion County, Tennessee were enrolled in Medicare Advantage in October 2026, 55.5% of 8,275 eligible beneficiaries (+0.01 pts since October 2025). BlueCross BlueShield of Tennessee is the largest parent organization with 46% of reported enrollment; 9 parent organizations have 11 or more members and the HHI is 2,973 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 188 members here are in plans that terminate or leave the county, and Centene Corporation leaves. MA plans offered go from 40 to 37.
Parent organizations in Marion County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| BlueCross BlueShield of Tennessee | 2,076 | +65 | 45.7% |
| UnitedHealth Group, Inc. | 976 | +29 | 21.5% |
| Humana Inc. | 852 | +78 | 18.8% |
| Health Care Service Corporation | 339 | −69 | 7.5% |
| Elevance Health, Inc. | 108 | 0 | 2.4% |
| CVS Health Corporation | 73 | −8 | 1.6% |
| Devoted Health, Inc. | 70 | +28 | 1.5% |
| Centene Corporation | 27 | −2 | 0.6% |
| BrightSpring Health Services, Inc. | 18 | +7 | 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, 1,487 beneficiaries in Marion County were assigned to 36 Medicare Shared Savings Program ACOs, 61.4% of assignable Original Medicare beneficiaries. Together, roughly 83% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.