Medicare Advantage in Gibson County, Tennessee
5,584 people in Gibson County, Tennessee were enrolled in Medicare Advantage in October 2026, 46.0% of 12,138 eligible beneficiaries (+0.8 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 36% of reported enrollment; 10 parent organizations have 11 or more members and the HHI is 2,499 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 407 members here are in plans that terminate or leave the county, and Centene Corporation leaves. MA plans offered go from 31 to 29.
Parent organizations in Gibson County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 1,975 | +192 | 35.7% |
| BlueCross BlueShield of Tennessee | 1,670 | +52 | 30.1% |
| Humana Inc. | 775 | +34 | 14.0% |
| Health Care Service Corporation | 491 | −55 | 8.9% |
| Elevance Health, Inc. | 325 | −63 | 5.9% |
| Highmark Health | 150 | −6 | 2.7% |
| CVS Health Corporation | 72 | 0 | 1.3% |
| Centene Corporation | 51 | −11 | 0.9% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 19 | +1 | 0.3% |
| Mitchell Family Office | 11 | −18 | 0.2% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 2,164 beneficiaries in Gibson County were assigned to 34 Medicare Shared Savings Program ACOs, 38.3% of assignable Original Medicare beneficiaries. Together, roughly 67% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.