Medicare Advantage in Stone County, Mississippi
2,457 people in Stone County, Mississippi were enrolled in Medicare Advantage in October 2026, 55.7% of 4,410 eligible beneficiaries (−0.1 pts since October 2025). Humana Inc. is the largest parent organization with 59% of reported enrollment; 8 parent organizations have 11 or more members and the HHI is 3,859 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 42 members here are in plans that terminate or leave the county, and BlueCross BlueShield of Alabama leaves. MA plans offered go from 35 to 38.
Parent organizations in Stone County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 1,433 | +129 | 58.8% |
| Health Care Service Corporation | 365 | −29 | 15.0% |
| UnitedHealth Group, Inc. | 258 | −99 | 10.6% |
| Devoted Health, Inc. | 142 | new | 5.8% |
| CVS Health Corporation | 95 | −77 | 3.9% |
| Centene Corporation | 89 | +38 | 3.7% |
| BlueCross BlueShield of Alabama | 31 | −32 | 1.3% |
| Elevance Health, Inc. | 24 | +1 | 1.0% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 939 beneficiaries in Stone County were assigned to 16 Medicare Shared Savings Program ACOs, 58.8% of assignable Original Medicare beneficiaries. Together, roughly 82% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.