Medicare Advantage in Coos County, Oregon
5,305 people in Coos County, Oregon were enrolled in Medicare Advantage in October 2026, 24.1% of 22,003 eligible beneficiaries (−0.5 pts since October 2025). Centene Corporation is the largest parent organization with 87% of reported enrollment; 7 parent organizations have 11 or more members and the HHI is 7,570 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 0 members here are in plans that terminate or leave the county. MA plans offered go from 1 to 1.
Parent organizations in Coos County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Centene Corporation | 4,540 | −17 | 86.7% |
| UnitedHealth Group, Inc. | 353 | −9 | 6.7% |
| CVS Health Corporation | 136 | −11 | 2.6% |
| Cambia Health Solutions, Inc. | 90 | −6 | 1.7% |
| Elevance Health, Inc. | 55 | −9 | 1.1% |
| California Physicians' Service | 45 | +3 | 0.9% |
| Humana Inc. | 19 | −4 | 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, 7,996 beneficiaries in Coos County were assigned to 60 Medicare Shared Savings Program ACOs, 70.5% of assignable Original Medicare beneficiaries. Together, roughly 78% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.