Medicare Advantage
UnitedHealthcare's 2027 Medicare Advantage lineup in Seattle: 5 new, 10 not returning
SEATTLE — UnitedHealthcare's 2027 Medicare Advantage lineup for King County looks different than it did this year. According to the CMS Landscape Source File for 2027, the carrier is offering 17 Medicare Advantage plans in the county next year, with 5 new plans, 10 plans not returning, and several others renamed. If you live in Seattle and have a UnitedHealthcare plan — or are weighing one — the Annual Enrollment Period runs October 15 through December 7, 2026, and any change you make takes effect January 1, 2027.
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Key takeaways
- UnitedHealthcare is offering 17 Medicare Advantage plans in King County for 2027: 10 HMO-POS and 7 PPO, with 15 including drug coverage.
- 5 of those plans are new for 2027, 10 of its 2026 plans are not returning, and several are renamed — your Annual Notice of Change explains what applies to you.
- 10 of the 17 are Special Needs Plans: 6 D-SNPs, 2 C-SNPs and 2 I-SNPs, each with its own eligibility rules.
- Before December 7, 2026, check each plan against your doctors and prescriptions on medicare.gov or by calling 1-800-MEDICARE.
| Fact | Figure | Source |
|---|---|---|
| Medicare Advantage plans offered in King County (2026) | 68 | CMS |
| Medicare Advantage plans offered in King County (2027) | 59 | CMS |
| Plans not returning for 2027 / new for 2027 | 27 / 18 | CMS |
| Organizations offering Medicare Advantage in King County (2026) | 10 | CMS |
| Share of eligible beneficiaries in Medicare Advantage, King County | 54% | CMS |
| Residents age 65 and older, King County | 320,899 | U.S. Census Bureau |
| Part B standard monthly premium (2026) | $202.90 | Medicare.gov |
| Part D out-of-pocket cap (2026) | $2,100 | CMS |
| Part D out-of-pocket cap (2027) | $2,400 | CMS |
| Annual Enrollment Period (for 2027 coverage) | October 15 – December 7, 2026 | Medicare.gov |
| Medicare Advantage Open Enrollment Period | January 1 – March 31 | Medicare.gov |
Area counts are for the county as a whole and are not a recommendation of any plan. Program figures are set nationally.
MyMedicarePlans.org is an independent consumer site, not UnitedHealthcare and not the federal government. UnitedHealthcare is one of 11 carriers offering Medicare Advantage in King County for 2027; together those carriers offer 59 plans. This article walks through only UnitedHealthcare's piece of that lineup.
What UnitedHealthcare Medicare Advantage plans are offered in Seattle for 2027?
UnitedHealthcare is offering 17 Medicare Advantage plans in King County, where Seattle is located, for 2027. By plan type, that is 10 HMO-POS plans and 7 PPO plans. 15 of the 17 include Part D prescription drug coverage; 2 do not.
The table below lists every UnitedHealthcare plan available in the county for 2027, in alphabetical order, with its plan type and whether it includes drug coverage. The names come from the CMS Landscape Source File and are listed as CMS has them.
Plan availability is set at the county level, so the same 17 plans are what any Medicare-eligible resident of King County sees — not just Seattle. If you live in a neighboring county, your lineup may differ.
What is new or not returning from UnitedHealthcare in King County for 2027?
Five UnitedHealthcare plans are new in King County for 2027, and ten of its 2026 plans are not returning. A handful of plans are keeping their contract but changing names.
The new-for-2027 plans are AARP Medicare Advantage from UHC WA-18 (PPO), AARP Medicare Advantage Patriot No Rx WA-MA02 (HMO-POS), AARP Medicare Advantage Patriot No RX WA-MA3 (PPO), UHC Complete Care Support WA-1A (HMO-POS C-SNP) and UHC Complete Care Support WA-3A (HMO-POS C-SNP).
Renamed plans include AARP Medicare Advantage from UHC WA-14 (HMO-POS) (previously AARP Medicare Advantage Extras from UHC WA-14), AARP Medicare Advantage from UHC WA-6 (HMO-POS) and WA-7 (HMO-POS) (previously the "Essentials" versions), and the UHC Dual Advantage WA-V1 (HMO-POS D-SNP) and WA-V2 (PPO D-SNP), which were previously branded UHC Dual Complete.
If your current plan is not returning, UnitedHealthcare and CMS will mail notices this fall. If it is returning, your Annual Notice of Change (ANOC) explains what is changing for 2027 — the specifics of premiums, cost-sharing, networks and drug lists are in that document, not here.
Which UnitedHealthcare Special Needs Plans are offered in Seattle for 2027?
10 of UnitedHealthcare's 17 plans in King County for 2027 are Special Needs Plans (SNPs), which are built for people who meet specific eligibility rules. The breakdown is 6 Dual-Eligible SNPs (D-SNPs), 2 Chronic Condition SNPs (C-SNPs) and 2 Institutional SNPs (I-SNPs).
- D-SNPs are for people who qualify for both Medicare and Medicaid.
- C-SNPs are for people with certain qualifying chronic conditions.
- I-SNPs are for people who live in, or need the level of care provided by, a long-term care facility.
Enrollment in a SNP requires proof you meet its specific criteria. If you are not sure which, if any, applies to you, Medicare.gov and 1-800-MEDICARE can walk you through it.
How do I check a UnitedHealthcare plan against my doctors and prescriptions before December 7, 2026?
The reliable path is the Medicare Plan Finder at medicare.gov. You can enter your ZIP code, type in each prescription with the dose and quantity, and add the doctors, specialists and pharmacies you want to keep in-network. The tool then shows how each plan in King County handles them.
A few things worth doing before December 7, 2026:
- Read your current plan's Annual Notice of Change, which arrived in late September. It flags what is changing for 2027.
- Confirm your doctors and preferred pharmacy are in the plan's 2027 network — networks can change year to year, even when the plan name does not.
- Check that every prescription is on the 2027 formulary and note its tier, any prior authorization, step therapy or quantity limits.
- Call the plan directly, using the number on its materials, to double-check anything the Plan Finder leaves unclear.
Nothing happens to you if you do nothing — your current plan renews for 2027 if it is still offered, with the changes described in its ANOC.
What's changing in Medicare drug coverage for 2027?
A few program-wide Part D figures are confirmed for 2027. The Part D out-of-pocket cap rises to $2,400 in 2027 (up from $2,100 in 2026). The Part D maximum deductible a plan can charge rises to $700 in 2027 (up from $615 in 2026). CMS has also set the Part D national base beneficiary premium at $41.33 for 2027; that is a formula input, not what any specific plan charges.
The Medicare Prescription Payment Plan — which lets you spread your out-of-pocket drug costs across the year in monthly installments — remains available in 2027.
The 2027 Part B standard premium and deductible, and the 2027 IRMAA income brackets, have not yet been announced. CMS typically publishes those figures later in the fall, usually in November.
By the numbers
Medicare Part B premium, 2006–2026
The standard monthly Part B premium has climbed from $88.50 in 2006 to $202.90 in 2026. Hover any point for that year’s premium.
Source: CMS. Standard premium shown; in some hold-harmless years many existing enrollees paid less. Confirm at Medicare.gov.
By the numbers
How people get Medicare in King County
(MA penetration in King County)
MA penetration from CMS enrollment data; Medigap share is an estimate. U.S. average is about 54% Medicare Advantage. These are area-level figures, not plan-specific.
2027 plan lineup
UnitedHealthcare Medicare Advantage plans in King County for 2027
CMS lists 17 UnitedHealthcare Medicare Advantage plans in King County for 2027, alphabetically by carrier. 10 other carriers also offer plans there.
| Plan | Type | Drug coverage | For 2027 |
|---|---|---|---|
| UnitedHealthcare 17 plans | |||
| AARP Medicare Advantage from UHC WA-0005 (HMO-POS) | HMO-POS | Yes | Returning |
| AARP Medicare Advantage from UHC WA-14 (HMO-POS) | HMO-POS | Yes | Renamed |
| AARP Medicare Advantage from UHC WA-18 (PPO) | PPO | Yes | New |
| AARP Medicare Advantage from UHC WA-6 (HMO-POS) | HMO-POS | Yes | Renamed |
| AARP Medicare Advantage from UHC WA-7 (HMO-POS) | HMO-POS | Yes | Renamed |
| AARP Medicare Advantage Patriot No Rx WA-MA02 (HMO-POS) | HMO-POS | No | New |
| AARP Medicare Advantage Patriot No RX WA-MA3 (PPO) | PPO | No | New |
| UHC Care Advantage WA-E001 (PPO I-SNP) | PPO I-SNP | Yes | Returning |
| UHC Complete Care Support WA-1A (HMO-POS C-SNP) | HMO-POS C-SNP | Yes | New |
| UHC Complete Care Support WA-3A (HMO-POS C-SNP) | HMO-POS C-SNP | Yes | New |
| UHC Dual Advantage WA-V1 (HMO-POS D-SNP) | HMO-POS D-SNP | Yes | Renamed |
| UHC Dual Advantage WA-V2 (PPO D-SNP) | PPO D-SNP | Yes | Renamed |
| UHC Dual Complete WA-Q1 (PPO D-SNP) | PPO D-SNP | Yes | Returning |
| UHC Dual Complete WA-Q2 (HMO-POS D-SNP) | HMO-POS D-SNP | Yes | Returning |
| UHC Dual Complete WA-S2 (PPO D-SNP) | PPO D-SNP | Yes | Returning |
| UHC Dual Complete WA-S4 (HMO-POS D-SNP) | HMO-POS D-SNP | Yes | Returning |
| UHC Nursing Home Plan WA-F001 (PPO I-SNP) | PPO I-SNP | Yes | Returning |
Source: CMS Medicare Advantage Landscape Source Files, plan years 2026 and 2027. Plan availability is set at the county level. No plan is ranked or recommended; premiums, benefits, networks and star ratings are not shown. Plan details come from the Medicare Plan Finder at medicare.gov or the plan itself.
The 2027 choices, by type
How UnitedHealthcare Medicare Advantage plans in King County break down for 2027
HMO plans use a network and usually a primary-care doctor and referrals; HMO-POS plans add some out-of-network coverage; PPO plans also cover out-of-network care, at a higher share; PFFS plans pay any provider that accepts the plan’s terms. Special Needs Plans serve people with Medicare and Medicaid (D-SNP), certain chronic conditions (C-SNP) or living in an institution (I-SNP).
Source: CMS Medicare Advantage Landscape Source Files, plan years 2026 and 2027. Plan availability is set at the county level. No plan is ranked or recommended; premiums, benefits, networks and star ratings are not shown. Plan details come from the Medicare Plan Finder at medicare.gov or the plan itself.
Key dates
Medicare enrollment periods at a glance
- Around your 65thInitial Enrollment PeriodA 7-month window around the month you turn 65 — your first chance to sign up.
- October 15 – December 7Annual Enrollment PeriodAnyone with Medicare can join, switch, or drop a Medicare Advantage or Part D plan.
- January 1 – March 31Medicare Advantage Open EnrollmentIf you're already in a Medicare Advantage plan, you can make one change.
- January 1 – March 31General Enrollment PeriodFor people who missed their first chance to sign up for Part B.
- VariesSpecial Enrollment PeriodTriggered by life events like moving or losing other coverage.
Dates are set by Medicare and apply nationwide. Confirm your personal windows at Medicare.gov or 1-800-MEDICARE.
Explore
When can you enroll? An interactive year
Enrollment windows are federal and the same nationwide. Confirm your personal dates at Medicare.gov or 1-800-MEDICARE.
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The parts of Medicare
Good to know
Frequently asked questions
Does UnitedHealthcare offer the same Medicare Advantage plans in every part of Seattle?
What happens if my UnitedHealthcare plan is one of the 10 not returning for 2027?
I like my current plan. Do I have to do anything by December 7, 2026?
Are the other carriers in King County worth comparing?
- CMS — MA Landscape Source File (plan-level availability by county)
- CMS — MA Landscape Source Files, current and coming plan year (year-over-year comparison)
- CMS — Medicare enrollment periods (medicare.gov)
For personalized answers, contact Medicare.gov or 1-800-MEDICARE.
Also for Seattle
Sources and methodology
- CMS, Medicare Advantage and Part D Landscape Source Files
- CMS, Medicare Advantage state/county penetration and enrollment files
- U.S. Census Bureau, American Community Survey (table B01001, age 65 and older)
- Medicare.gov, Medicare costs (Part B premium)
- CMS, Medicare prescription drug coverage (Part D) program rules
- CMS, Medicare Advantage and Part D plan-year announcements
- Medicare.gov, enrollment periods and plan rules
Figures cited in this article
- CMS Medicare Advantage Landscape Source Files (2026 and 2027): UnitedHealthcare's plan counts, plan names, plan types, SNP categories, and the new/not returning/renamed status for King County.
- CMS: the 2027 Part D out-of-pocket cap, maximum deductible and national base beneficiary premium.
- Medicare.gov: the Annual Enrollment Period dates, how the Plan Finder works, and 1-800-MEDICARE as a help line.
How we put this together: area counts come from the CMS files listed above for the county that contains this city, program figures come from CMS, Medicare.gov and the Social Security Administration, and no plan is ranked or recommended.
By The Medicare Desk · Published . For personalized answers, contact Medicare.gov or 1-800-MEDICARE.
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This page was last updated: October 2026.