Medicare Advantage in Johnston County, North Carolina
25,156 people in Johnston County, North Carolina were enrolled in Medicare Advantage in October 2026, 57.0% of 44,156 eligible beneficiaries (+0.2 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 36% of reported enrollment; 11 parent organizations have 11 or more members and the HHI is 2,443 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 1,232 members here are in plans that terminate or leave the county, and Health Care Service Corporation leaves. MA plans offered go from 46 to 36.
Parent organizations in Johnston County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 9,072 | +763 | 36.3% |
| Humana Inc. | 6,603 | −1,674 | 26.4% |
| CuraCor Solutions Corp. | 3,824 | +758 | 15.3% |
| CVS Health Corporation | 2,914 | +114 | 11.6% |
| Alignment Healthcare USA, LLC | 1,924 | +1,144 | 7.7% |
| Centene Corporation | 250 | +23 | 1.0% |
| Health Care Service Corporation | 238 | −25 | 1.0% |
| Liberty Healthcare Insurance | 88 | +3 | 0.4% |
| Highmark Health | 43 | +4 | 0.2% |
| Elevance Health, Inc. | 36 | +1 | 0.1% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 23 | −4 | 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, 6,744 beneficiaries in Johnston County were assigned to 111 Medicare Shared Savings Program ACOs, 51.6% of assignable Original Medicare beneficiaries. Together, roughly 79% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.