Medicare Advantage in Multnomah County, Oregon
91,882 people in Multnomah County, Oregon were enrolled in Medicare Advantage in October 2026, 65.7% of 139,818 eligible beneficiaries (−1.4 pts since October 2025). Kaiser Foundation Health Plan, Inc. is the largest parent organization with 27% of reported enrollment; 18 parent organizations have 11 or more members and the HHI is 1,808 (highly concentrated). For 2027, 20,606 members here are in plans that terminate or leave the county, and Providence St Joseph Health, PacificSource, Health Care Service Corporation leave. MA plans offered go from 43 to 32.
Parent organizations in Multnomah County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Kaiser Foundation Health Plan, Inc. | 24,559 | +707 | 26.8% |
| UnitedHealth Group, Inc. | 23,292 | +933 | 25.4% |
| Providence St Joseph Health | 15,795 | −620 | 17.2% |
| CareOregon, Inc. | 6,734 | −1,437 | 7.3% |
| Humana Inc. | 5,623 | +1,430 | 6.1% |
| Cambia Health Solutions, Inc. | 4,888 | −482 | 5.3% |
| Centene Corporation | 2,810 | +15 | 3.1% |
| CVS Health Corporation | 2,726 | +387 | 3.0% |
| Devoted Health, Inc. | 2,453 | +628 | 2.7% |
| PacificSource | 1,117 | −1,171 | 1.2% |
| Providence Health & Services | 914 | +17 | 1.0% |
| Health Care Service Corporation | 231 | −551 | 0.3% |
| Elevance Health, Inc. | 175 | +13 | 0.2% |
| ATRIO Health Plans | 125 | −2 | 0.1% |
| Marquis Companies I, Inc. | 113 | −28 | 0.1% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 14,309 beneficiaries in Multnomah County were assigned to 150 Medicare Shared Savings Program ACOs, 54.5% of assignable Original Medicare beneficiaries. Together, roughly 84% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.