Medicare Advantage in Montgomery County, Tennessee
14,868 people in Montgomery County, Tennessee were enrolled in Medicare Advantage in October 2026, 43.8% of 33,952 eligible beneficiaries (+0.5 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 28% of reported enrollment; 10 parent organizations have 11 or more members and the HHI is 2,020 (highly concentrated). For 2027, 1,707 members here are in plans that terminate or leave the county, and Centene Corporation leaves. MA plans offered go from 35 to 28.
Parent organizations in Montgomery County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 4,063 | −234 | 27.5% |
| Health Care Service Corporation | 3,346 | +583 | 22.7% |
| Humana Inc. | 3,069 | +389 | 20.8% |
| BlueCross BlueShield of Tennessee | 2,363 | +8 | 16.0% |
| Elevance Health, Inc. | 908 | −60 | 6.2% |
| CVS Health Corporation | 652 | −27 | 4.4% |
| Centene Corporation | 253 | −7 | 1.7% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 78 | +1 | 0.5% |
| BrightSpring Health Services, Inc. | 20 | −5 | 0.1% |
| UMWA Health and Retirement Funds | 11 | 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, 7,410 beneficiaries in Montgomery County were assigned to 114 Medicare Shared Savings Program ACOs, 57.5% of assignable Original Medicare beneficiaries. Together, roughly 76% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.