Medicare Advantage in Washington County, Tennessee
21,165 people in Washington County, Tennessee were enrolled in Medicare Advantage in October 2026, 61.6% of 34,373 eligible beneficiaries (+0.3 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 48% of reported enrollment; 11 parent organizations have 11 or more members and the HHI is 3,441 (highly concentrated). For 2027, 835 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 Washington County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 10,070 | −1,343 | 47.8% |
| BlueCross BlueShield of Tennessee | 5,833 | +1,270 | 27.7% |
| Humana Inc. | 4,147 | +627 | 19.7% |
| Elevance Health, Inc. | 331 | −11 | 1.6% |
| Devoted Health, Inc. | 258 | +123 | 1.2% |
| CVS Health Corporation | 233 | +13 | 1.1% |
| Centene Corporation | 73 | −8 | 0.3% |
| Missouri Healthcare Advisors, LLC | 52 | 0 | 0.2% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 51 | −8 | 0.2% |
| Health Care Service Corporation | 16 | −67 | under 0.1% |
| UMWA Health and Retirement Funds | 14 | 0 | under 0.1% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 1,864 beneficiaries in Washington County were assigned to 89 Medicare Shared Savings Program ACOs, 20.4% of assignable Original Medicare beneficiaries. Together, roughly 69% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.