MA Enrollment Explorer / Parent organizations / PacificSource
PacificSource: Medicare Advantage enrollment and market share
PacificSource had 54,976 Medicare Advantage members in October 2026, #50 nationally with 0.15% of all MA enrollment. It gained 3,140 members (+6.1%) since October 2025, and has enrollment in 3 states and 29 counties with 11 or more members, leading the market in 10 of them. In the 2026 Annual Election Period (December to February) it gained 3,759 members (+7.3%). For 2027, 26,241 of its members are in plans that terminate and 16,113 in plans leaving their county, and it leaves 11 counties entirely.
55KMA members, October 2026
+6.1%change since October 2025 (+3,140)
0.15%national MA share, rank 50
2contracts with enrollment
Largest states
Largest counties
| County | Members | Change since October 2025 | Share of county MA |
|---|---|---|---|
| Deschutes County, OR | 18,170 | +1,666 | 88.2% |
| Lane County, OR | 5,828 | −2,182 | 9.4% |
| Kootenai County, ID | 4,985 | +1,815 | 24.8% |
| Twin Falls County, ID | 3,368 | +2,380 | 30.6% |
| Crook County, OR | 3,046 | +307 | 92.0% |
| Jefferson County, OR | 2,402 | +209 | 94.1% |
| Bonner County, ID | 2,399 | +575 | 38.9% |
| Ada County, ID | 1,938 | +1,035 | 3.3% |
| Wasco County, OR | 1,876 | −19 | 91.2% |
| Marion County, OR | 1,130 | −1 | 2.4% |
| Multnomah County, OR | 1,117 | −1,171 | 1.2% |
| Yellowstone County, MT | 1,099 | +125 | 7.5% |
| Jerome County, ID | 1,096 | +781 | 47.9% |
| Hood River County, OR | 833 | +30 | 46.6% |
| Gooding County, ID | 797 | +490 | 47.1% |
Contracts
| Contract | Plan type | Oct 2024 | Oct 2025 | Oct 2026 |
|---|---|---|---|---|
| H3864 PacificSource Medicare | HMO/HMOPOS | 47,318 | 48,637 | 52,448 |
| H4754 PacificSource Medicare | Local PPO | 8,742 | 3,199 | 2,528 |
| H8261 PacificSource PACE | National PACE | n/a | n/a | 0 |
Star ratings for these contracts are in the MA Quality Dashboard.