Medicare Advantage in Grant County, Washington
6,764 people in Grant County, Washington were enrolled in Medicare Advantage in October 2026, 36.6% of 18,469 eligible beneficiaries (+1.4 pts since October 2025). Humana Inc. is the largest parent organization with 42% of reported enrollment; 8 parent organizations have 11 or more members and the HHI is 3,217 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 2,676 members here are in plans that terminate or leave the county, and Elevance Health, Inc. leaves. MA plans offered go from 12 to 8.
Parent organizations in Grant County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 2,822 | +1,179 | 42.0% |
| Centene Corporation | 2,440 | −427 | 36.3% |
| UnitedHealth Group, Inc. | 516 | +121 | 7.7% |
| Community Health Plan of Washington | 474 | −484 | 7.1% |
| Molina Healthcare, Inc. | 304 | −40 | 4.5% |
| CVS Health Corporation | 130 | +4 | 1.9% |
| Elevance Health, Inc. | 19 | new | 0.3% |
| Cambia Health Solutions, Inc. | 13 | +1 | 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, 6,762 beneficiaries in Grant County were assigned to 49 Medicare Shared Savings Program ACOs, 71.6% 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.