Medicare Advantage in Miller County, Missouri
3,307 people in Miller County, Missouri were enrolled in Medicare Advantage in October 2026, 52.6% of 6,284 eligible beneficiaries (−0.2 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 52% of reported enrollment; 6 parent organizations have 11 or more members and the HHI is 3,701 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 426 members here are in plans that terminate or leave the county. MA plans offered go from 24 to 27.
Parent organizations in Miller County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 1,689 | −286 | 51.7% |
| Humana Inc. | 877 | +530 | 26.9% |
| CVS Health Corporation | 565 | +117 | 17.3% |
| Centene Corporation | 66 | +18 | 2.0% |
| Rifkin Managed Care Holding, LLC | 36 | 0 | 1.1% |
| Elevance Health, Inc. | 33 | −309 | 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, 404 beneficiaries in Miller County were assigned to 25 Medicare Shared Savings Program ACOs, 18.6% of assignable Original Medicare beneficiaries. Together, roughly 61% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.