Medicare Advantage in Madison County, Tennessee
10,751 people in Madison County, Tennessee were enrolled in Medicare Advantage in October 2026, 46.8% of 22,994 eligible beneficiaries (+0.7 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 33% of reported enrollment; 8 parent organizations have 11 or more members and the HHI is 2,508 (highly concentrated). For 2027, 681 members here are in plans that terminate or leave the county, and Centene Corporation leaves. MA plans offered go from 30 to 27.
Parent organizations in Madison County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 3,491 | +189 | 32.7% |
| BlueCross BlueShield of Tennessee | 3,296 | +132 | 30.9% |
| Humana Inc. | 1,991 | +207 | 18.7% |
| Health Care Service Corporation | 1,090 | −137 | 10.2% |
| Elevance Health, Inc. | 578 | −42 | 5.4% |
| Centene Corporation | 92 | −12 | 0.9% |
| CVS Health Corporation | 80 | +2 | 0.7% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 52 | −6 | 0.5% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 1,404 beneficiaries in Madison County were assigned to 62 Medicare Shared Savings Program ACOs, 14.7% of assignable Original Medicare beneficiaries. Together, roughly 55% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.