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    FreeTwo 2027 reports
    Medicare Advantage · Oregon · enrollment Oct 2026

    Medicare Advantage in Oregon: 466,507 members, 15 carriers, UnitedHealth in front.

    UnitedHealth holds 30.6% of Oregon’s visible Medicare Advantage members, ahead of Kaiser at 13.0% and Providence at 9.6%. The market grew +0.7% (+3,114 members) from Nov 2025 to Oct 2026 and stepped −1.5% at the 2026 election period. 53.8% of the state's Medicare beneficiaries are in a Medicare Advantage plan.

    Visible members
    466,507
    Oct 2026
    Carriers
    15
    93 plans with members
    MA penetration
    53.8%
    of 977,770 eligible
    Twelve months
    +0.7%
    +3,114 members
    Election step
    −1.5%
    December to January 2026
    Top three
    53.2%
    HHI 1,500, moderately concentrated

    Every carrier with members in Oregon

    Ranked by visible members in Oct 2026. The twelve-month change runs Nov 2025 to Oct 2026; the election step is the carrier’s own December-to-January change. Counties led counts counties where the carrier has the most visible members and at least one other carrier is visible. UnitedHealth leads 7 of the 17 counties with a lead. At the election period Devoted stepped up most (+174.0%) and Samaritan Health Services, Inc. stepped down most (−88.6%).

    #CarrierMembersShareTwelve monthsElection stepCounties ledRating$0 premiumPlans
    1UnitedHealth142,624
    30.6%
    		+14.8%+10.4%7 of 133.73100%10
    2Kaiser60,840
    13.0%
    		+5.6%+2.1%1 of 104.5038%4
    3Providence44,834
    9.6%
    		−18.5%−24.0%0 of 7––6
    4Cambia41,890
    9.0%
    		−3.4%−1.4%3 of 133.5011%5
    5PacificSource36,513
    7.8%
    		−8.4%−5.9%2 of 133.0025%11
    6Centene36,082
    7.7%
    		−9.3%−1.7%1 of 142.9425%11
    7ATRIO33,530
    7.2%
    		−13.4%−8.0%2 of 112.5081%16
    8Devoted19,494
    4.2%
    		+234.5%+174.0%1 of 123.2055%7
    9Humana16,908
    3.6%
    		+25.5%+14.8%0 of 124.29100%11
    10Aetna (CVS)15,555
    3.3%
    		+41.3%+9.6%0 of 73.48100%5
    11CareOregon13,029
    2.8%
    		−17.8%−7.1%0 of 53.50100%1
    12AllCare2,471
    0.5%
    		−3.6%−1.4%0 of 42.50100%1
    13Samaritan Health Services, Inc.1,364
    0.3%
    		−90.0%−88.6%0 of 43.00100%1
    14Marquis Companies I, Inc.880
    0.2%
    		+13.1%+1.9%0 of 8–69%2
    15Health Care Service Corporation493
    0.1%
    		−70.9%−75.5%0 of 43.86–2

    Oregon county by county

    30 counties with visible members, largest first. A county’s leader is the carrier with the most visible members there; a county with one visible carrier shows no leader, because the others are suppressed, not absent. Penetration is Medicare Advantage members as a share of the county’s Medicare beneficiaries.

    CountyVisible membersCarriersLeaderLeader shareMA penetrationDual eligibles
    Multnomah79,23613UnitedHealth27.1%65.7%31,177
    Washington60,91313UnitedHealth32.8%64.4%15,044
    Lane57,8179UnitedHealth52.5%63.3%17,550
    Clackamas56,91913UnitedHealth31.9%66.1%12,114
    Marion41,15110UnitedHealth53.3%64.7%13,996
    Jackson28,9158Cambia27.0%49.2%10,783
    Linn18,3477Centene28.1%61.2%6,055
    Deschutes18,1611one visible carrier–38.5%5,952
    Douglas17,4044ATRIO70.9%50.9%7,048
    Josephine15,7696Cambia28.4%58.7%5,810
    Yamhill13,5848UnitedHealth49.1%59.3%3,758
    Polk11,6706UnitedHealth52.6%64.8%2,952
    Benton8,6586Cambia40.7%49.3%2,349
    Columbia7,4529Kaiser30.6%60.9%2,082
    Klamath7,1983ATRIO94.8%39.5%4,141
    Lincoln5,0372Devoted93.3%31.0%3,031
    Coos4,5381one visible carrier–24.1%4,630
    Crook3,0441one visible carrier–40.4%1,223
    Jefferson2,4021one visible carrier–41.7%1,268
    Malheur2,2261one visible carrier–34.4%1,721
    Wasco1,8741one visible carrier–31.3%1,252
    Hood River1,5745PacificSource52.9%34.2%731
    Tillamook7861one visible carrier–13.5%1,409
    Baker7051one visible carrier–15.8%968
    Wallowa3381one visible carrier–14.8%413
    Morrow3081one visible carrier–16.1%476
    Clatsop1811one visible carrier–5.8%1,995
    Curry1161one visible carrier–5.1%1,719
    Sherman1142PacificSource81.6%25.8%85
    Gilliam701one visible carrier–16.5%110

    Oregon's twelve months

    Visible Medicare Advantage members in Oregon each month, Nov 2025 to Oct 2026. The December-to-January step is the election period; the rest of the year moves on new eligibles, special enrollment and deaths.

    Nov 2025 · 463,393Oct 2026 · 466,507

    What 2027 does to Oregon

    The fate assigned to every plan for 2027, joined to the members in it today. A plan that ends sends its members to choose again; a plan dropping counties keeps the plan but not every county, and which counties is not stated.

    Plans that end
    68,520

    members in Oregon are in plans that end for 2027.

    • Providence44,834
    • PacificSource8,085
    • Aetna (CVS)7,388
    • UnitedHealth6,785
    • Centene735
    • Health Care Service Corporation493
    • ATRIO200
    Plans dropping counties
    202,970

    members are in plans that keep selling in Oregon but drop at least one county for 2027.

    • UnitedHealth · 6 plans119,959
    • Cambia · 4 plans39,978
    • PacificSource · 1 plans20,906
    • Centene · 5 plans18,967
    • Humana · 6 plans3,160

    The plans on sale in Oregon for 2027

    Benefit design weighted by each plan’s members today, so a figure is what the market’s members are offered, not a count of plans. The rating is the 2027 overall Star Rating, weighted the same way.

    $0 premium
    63%

    of members are in a plan with no monthly premium

    In-network maximum
    $7,150

    median out-of-pocket maximum, member weighted

    Star Rating
    3.56

    2027 overall, member weighted

    • UnitedHealth3.73 stars · 100% at $0 · $7,150 max
    • Kaiser4.50 stars · 38% at $0 · $5,250 max
    • Providencenot rated · – at $0 · – max
    • Cambia3.50 stars · 11% at $0 · $7,150 max
    • PacificSource3.00 stars · 25% at $0 · $7,150 max
    • Centene2.94 stars · 25% at $0 · $7,900 max
    • ATRIO2.50 stars · 81% at $0 · $7,150 max
    • Devoted3.20 stars · 55% at $0 · $6,700 max
    • Humana4.29 stars · 100% at $0 · $5,150 max
    • Aetna (CVS)3.48 stars · 100% at $0 · $7,150 max
    • CareOregon3.50 stars · 100% at $0 · $9,850 max
    Carrier Command · for Medicare Advantage plans

    The read on every carrier in Oregon is in Carrier Command.

    A monthly position page for each of the 15 carriers here: risk and rebate against the market, Stars levers, the election-period forecast, county standing and the written read. Launching for Medicare Advantage plans.

    Request early access See Carrier Command

    Other states

    Every state has its own page; the largest carriers have one nationally.

    UnitedHealth in every state · Kaiser in every state · Providence in every state · All states and carriers

    How these numbers are made

    • Members are visible members: CMS suppresses any plan-county cell of ten or fewer, so small counties undercount. Market share excludes employer group plans.
    • Enrollment is Oct 2026; the twelve months run Nov 2025 to Oct 2026; the election step compares December 2025 with January 2026.
    • Plan fates are the ones assigned for contract year 2027; benefit design is the 2027 filing; the rating is the 2027 overall Star Rating of each carrier's contracts, weighted by members in Oregon.
    • A carrier is a parent organization; its brands in Oregon may carry other names. The rank 1st to 15th counts every parent with visible members in 2026.
    • Every figure comes from public CMS data as Livmor reads it, and the page is rebuilt when a new month posts. Livmor Carrier Command, public CMS data.