MA Enrollment Explorer / Parent organizations / ATRIO Health Plans
ATRIO Health Plans: Medicare Advantage enrollment and market share
ATRIO Health Plans had 33,733 Medicare Advantage members in October 2026, #72 nationally with 0.09% of all MA enrollment. It lost 5,405 members (−13.8%) since October 2025, and has enrollment in 1 state and 12 counties with 11 or more members, leading the market in 2 of them. In the 2026 Annual Election Period (December to February) it lost 3,542 members (−9.1%). For 2027, 200 of its members are in plans that terminate and 16 in plans leaving their county. Among members who stay, 0 lose a Part B giveback and 5,410 an OTC allowance.
34KMA members, October 2026
−13.8%change since October 2025 (−5,405)
0.09%national MA share, rank 72
4contracts with enrollment
Largest states
| State | Members | Share of state MA |
|---|---|---|
| Oregon | 33,611 | 6.4% |
Largest counties
| County | Members | Change since October 2025 | Share of county MA |
|---|---|---|---|
| Douglas County, OR | 12,342 | +415 | 66.8% |
| Klamath County, OR | 6,824 | −140 | 90.7% |
| Marion County, OR | 4,408 | +66 | 9.4% |
| Lane County, OR | 4,009 | +366 | 6.5% |
| Jackson County, OR | 3,312 | −4,010 | 10.8% |
| Polk County, OR | 1,756 | −164 | 13.1% |
| Josephine County, OR | 497 | −1,687 | 3.0% |
| Yamhill County, OR | 136 | −36 | 0.9% |
| Multnomah County, OR | 125 | −2 | 0.1% |
| Clackamas County, OR | 116 | −19 | 0.2% |
| Washington County, OR | 73 | −10 | 0.1% |
| Linn County, OR | 13 | +1 | 0.1% |
| Lyon County, NV | 0 | −25 | 0.0% |
| Douglas County, NV | 0 | −23 | 0.0% |
| Carson City, NV | 0 | −13 | 0.0% |
Contracts
| Contract | Plan type | Oct 2024 | Oct 2025 | Oct 2026 |
|---|---|---|---|---|
| H6743 ATRIO Health Plans | Local PPO | 23,593 | 26,229 | 21,080 |
| H7006 ATRIO Health Plans | Local PPO | 9,830 | 10,564 | 10,452 |
| H3814 ATRIO Health Plans | HMO/HMOPOS | 2,840 | 2,282 | 2,000 |
| H5995 ATRIO Health Plans | HMO/HMOPOS | 2,089 | 63 | 201 |
Star ratings for these contracts are in the MA Quality Dashboard.