Medicare Advantage in Johnson County, Missouri
4,363 people in Johnson County, Missouri were enrolled in Medicare Advantage in October 2026, 44.5% of 9,815 eligible beneficiaries (−0.05 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 72% of reported enrollment; 6 parent organizations have 11 or more members and the HHI is 5,517 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 375 members here are in plans that terminate or leave the county, and Health Care Service Corporation leaves. MA plans offered go from 21 to 22.
Parent organizations in Johnson County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 3,140 | +613 | 72.5% |
| CVS Health Corporation | 497 | −677 | 11.5% |
| Humana Inc. | 488 | +135 | 11.3% |
| Centene Corporation | 109 | +31 | 2.5% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 67 | −3 | 1.5% |
| Health Care Service Corporation | 33 | +19 | 0.8% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 617 beneficiaries in Johnson County were assigned to 30 Medicare Shared Savings Program ACOs, 14.6% of assignable Original Medicare beneficiaries. Together, roughly 53% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.