Medicare Advantage in Kittitas County, Washington
2,927 people in Kittitas County, Washington were enrolled in Medicare Advantage in October 2026, 26.8% of 10,923 eligible beneficiaries (+0.8 pts since October 2025). Humana Inc. is the largest parent organization with 53% of reported enrollment; 8 parent organizations have 11 or more members and the HHI is 4,245 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 39 members here are in plans that terminate or leave the county. MA plans offered go from 5 to 5.
Parent organizations in Kittitas County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 1,529 | +420 | 53.3% |
| UnitedHealth Group, Inc. | 1,061 | −28 | 37.0% |
| CVS Health Corporation | 152 | +11 | 5.3% |
| Molina Healthcare, Inc. | 65 | −16 | 2.3% |
| Cambia Health Solutions, Inc. | 19 | +7 | 0.7% |
| Centene Corporation | 15 | −250 | 0.5% |
| Community Health Plan of Washington | 15 | +2 | 0.5% |
| Elevance Health, Inc. | 12 | new | 0.4% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 1,153 beneficiaries in Kittitas County were assigned to 49 Medicare Shared Savings Program ACOs, 19.5% of assignable Original Medicare beneficiaries. Together, roughly 41% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.