Medicare Advantage in Marion County, Oregon
46,858 people in Marion County, Oregon were enrolled in Medicare Advantage in October 2026, 64.7% of 72,375 eligible beneficiaries (−0.7 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 49% of reported enrollment; 18 parent organizations have 11 or more members and the HHI is 3,064 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 3,632 members here are in plans that terminate or leave the county, and Samaritan Health Services, Inc., Providence St Joseph Health leave. MA plans offered go from 25 to 22.
Parent organizations in Marion County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 22,878 | +5,397 | 49.0% |
| Kaiser Foundation Health Plan, Inc. | 10,391 | +379 | 22.2% |
| ATRIO Health Plans | 4,408 | +66 | 9.4% |
| Centene Corporation | 3,090 | −1,266 | 6.6% |
| Providence St Joseph Health | 1,731 | −2,950 | 3.7% |
| Cambia Health Solutions, Inc. | 1,664 | −458 | 3.6% |
| PacificSource | 1,130 | −1 | 2.4% |
| Devoted Health, Inc. | 887 | new | 1.9% |
| CVS Health Corporation | 188 | −1,752 | 0.4% |
| Marquis Companies I, Inc. | 89 | +17 | 0.2% |
| Highmark Health | 59 | −4 | 0.1% |
| Humana Inc. | 57 | −9 | 0.1% |
| Elevance Health, Inc. | 45 | −6 | under 0.1% |
| Providence Health & Services | 30 | −2 | under 0.1% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 16 | +2 | under 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, 3,843 beneficiaries in Marion County were assigned to 86 Medicare Shared Savings Program ACOs, 25.6% of assignable Original Medicare beneficiaries. Together, roughly 74% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.