Medicare Advantage in Linn County, Oregon
20,017 people in Linn County, Oregon were enrolled in Medicare Advantage in October 2026, 61.2% of 32,734 eligible beneficiaries (−1.2 pts since October 2025). Centene Corporation is the largest parent organization with 26% of reported enrollment; 13 parent organizations have 11 or more members and the HHI is 1,888 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 2,339 members here are in plans that terminate or leave the county, and Cambia Health Solutions, Inc. leaves. MA plans offered go from 24 to 20.
Parent organizations in Linn County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Centene Corporation | 5,153 | −186 | 25.8% |
| UnitedHealth Group, Inc. | 4,649 | +730 | 23.3% |
| Devoted Health, Inc. | 4,519 | +4,141 | 22.6% |
| Cambia Health Solutions, Inc. | 1,828 | +107 | 9.2% |
| Kaiser Foundation Health Plan, Inc. | 1,210 | +96 | 6.1% |
| Humana Inc. | 1,025 | +237 | 5.1% |
| Samaritan Health Services, Inc. | 670 | −4,822 | 3.4% |
| Highmark Health | 404 | +1 | 2.0% |
| Providence St Joseph Health | 346 | −113 | 1.7% |
| CVS Health Corporation | 80 | −266 | 0.4% |
| Elevance Health, Inc. | 44 | −5 | 0.2% |
| California Physicians' Service | 14 | +1 | under 0.1% |
| ATRIO Health Plans | 13 | +1 | 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, 467 beneficiaries in Linn County were assigned to 52 Medicare Shared Savings Program ACOs, 5.6% of assignable Original Medicare beneficiaries. Together, roughly 63% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.