Medicare Advantage in Platte County, Missouri
9,211 people in Platte County, Missouri were enrolled in Medicare Advantage in October 2026, 44.2% of 20,845 eligible beneficiaries (−0.5 pts since October 2025). Humana Inc. is the largest parent organization with 56% of reported enrollment; 9 parent organizations have 11 or more members and the HHI is 4,129 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 41 members here are in plans that terminate or leave the county, and Health Care Service Corporation leaves. MA plans offered go from 35 to 35.
Parent organizations in Platte County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 5,182 | +3,022 | 56.5% |
| UnitedHealth Group, Inc. | 2,657 | −2,405 | 29.0% |
| CVS Health Corporation | 856 | −359 | 9.3% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 225 | −4 | 2.5% |
| Devoted Health, Inc. | 130 | +76 | 1.4% |
| Health Care Service Corporation | 41 | −49 | 0.4% |
| Centene Corporation | 35 | −18 | 0.4% |
| Mitchell Family Office | 29 | 0 | 0.3% |
| Elevance Health, Inc. | 15 | 0 | 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, 4,601 beneficiaries in Platte County were assigned to 53 Medicare Shared Savings Program ACOs, 56.3% 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.