Medicare Advantage in Jefferson County, Oregon
2,595 people in Jefferson County, Oregon were enrolled in Medicare Advantage in October 2026, 41.7% of 6,227 eligible beneficiaries (−2.2 pts since October 2025). PacificSource is the largest parent organization with 94% of reported enrollment; 4 parent organizations have 11 or more members and the HHI is 8,873 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 1,823 members here are in plans that terminate or leave the county. MA plans offered go from 5 to 3.
Parent organizations in Jefferson County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| PacificSource | 2,402 | +209 | 94.1% |
| UnitedHealth Group, Inc. | 75 | −4 | 2.9% |
| Providence St Joseph Health | 54 | −295 | 2.1% |
| CVS Health Corporation | 21 | +3 | 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, 546 beneficiaries in Jefferson County were assigned to 21 Medicare Shared Savings Program ACOs, 24.6% of assignable Original Medicare beneficiaries. Together, roughly 56% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.