Medicare Advantage

Kaiser Permanente Medicare Advantage in Washington for 2027: 17 Plans, County by County

OLYMPIA, Wash. — For the 2027 plan year, Kaiser Permanente is offering 17 Medicare Advantage plans across Washington state, according to the Centers for Medicare & Medicaid Services Landscape Source Files. All 17 include drug coverage. The plans are spread across different counties, so what shows up on this statewide list may or may not appear on the plan finder when a reader types in their own ZIP code.

This article is published by an independent Medicare education site. We are privately owned, not part of the government, and not affiliated with Kaiser Permanente or any other insurance carrier. The purpose here is to help Washington readers understand what CMS has posted for 2027 and where to go for the specific details that matter to their household.

What is Kaiser Permanente offering in Washington for Medicare Advantage in 2027?

Kaiser Permanente is offering 17 Medicare Advantage plans in Washington for 2027: 14 HMO plans and 3 HMO-POS plans. All 17 include prescription drug coverage. The carrier is not offering any Special Needs Plans in the state this year — zero D-SNPs, zero C-SNPs, and zero I-SNPs — so shoppers who qualify for a dual-eligible, chronic condition, or institutional plan will need to look at other carriers or other plan types.

For context on the broader market, CMS lists 14 other Medicare Advantage carriers in Washington for 2027, and 115 Medicare Advantage plans in total statewide across all carriers combined.

Which Kaiser Permanente plans in Washington reach the most counties in 2027?

Among Kaiser Permanente's 2027 Washington plans, Kaiser Permanente Medicare Advantage Basic (HMO) has the widest reach, listed in 9 counties. Kaiser Permanente Medicare Advantage Optimal (HMO) is listed in 7 counties. Several others — Kaiser Permanente Medicare Advantage Essential (HMO) and Kaiser Permanente Medicare Advantage Vital Sound (HMO) — are listed in 4 counties each, while the three HMO-POS plans (Kaiser Permanente Senior Advantage Enhanced, Standard, and Value) are each listed in 3 counties.

The remaining plans in the lineup — including the Centennial, Columbia, the four "Essential" county-specific variants, and the four "Key" plans named for King, Pierce, Snohomish, and Thurston — are each listed in a single county. The full plan-by-plan list is rendered as a table elsewhere on this page.

Being listed in more counties does not make a plan better or worse. It just means the service area is wider. Fit depends on your own doctors, prescriptions, and county.

What is new or not returning for Kaiser Permanente in Washington for 2027?

For 2027 in Washington, Kaiser Permanente has 0 new Medicare Advantage plans and 3 plans from 2026 that are not returning. If you are currently enrolled in a Kaiser Permanente plan, your plan's Annual Notice of Change — mailed in the fall of 2026 — will tell you whether your specific plan is continuing, changing, or ending for 2027.

If a plan is not continuing, enrollees generally have a Special Enrollment Period to pick a different plan. The notice from the carrier will explain the window and the options.

How do I check whether a Kaiser Permanente plan is offered in my Washington county and covers my doctors and prescriptions for 2027?

To check whether a specific Kaiser Permanente plan is offered in your Washington county for 2027, use the Medicare Plan Finder at medicare.gov and enter your ZIP code, or call 1-800-MEDICARE (TTY 1-877-486-2048), available 24 hours a day, 7 days a week. The Plan Finder shows which plans are available in your ZIP code and lets you enter your prescriptions to see how they are handled.

A few things to confirm before you enroll in any plan:

• Service area: is the plan actually offered in your county? A plan listed statewide here may not be in your county.
• Doctors and hospitals: are the providers you want in the plan's network? Check the plan's own provider directory.
• Prescriptions: are your medications on the plan's formulary, and at what tier? Check the plan's drug list.
• Plan documents: the Evidence of Coverage and Summary of Benefits spell out how the plan works.

We intentionally do not quote premiums, copays, deductibles, benefits, star ratings, or network details in this article. Those details change by plan and by county, and the authoritative source is the plan's own documents or the Plan Finder.

What should Washington residents do before December 7, 2026?

Before December 7, 2026, Washington residents enrolled in or considering a Medicare Advantage plan should review their choices for the 2027 plan year during the Annual Enrollment Period, which runs October 15 through December 7, 2026. A choice made in that window takes effect January 1, 2027.

A simple checklist:

1. Read your Annual Notice of Change if you are already enrolled in a plan. 2. Make a list of your doctors, hospitals, and prescriptions. 3. Run your ZIP code through medicare.gov to see every plan available to you. 4. Compare the plan documents directly from the carrier. 5. Make your decision by December 7, 2026.

There is no need to rush. The dates are what they are, and the Plan Finder is open throughout the window.

Where can Washington residents get free help comparing Medicare plans for 2027?

Washington residents can get free help comparing 2027 Medicare plans at medicare.gov or by calling 1-800-MEDICARE (TTY 1-877-486-2048), 24 hours a day, 7 days a week. Both resources are run by the federal government and do not sell insurance.

The Plan Finder at medicare.gov lets you compare every Medicare Advantage and Part D plan available in your ZIP code side by side, enter your prescriptions, and look up providers. Representatives on the 1-800-MEDICARE line can walk you through enrollment, Special Enrollment Periods, and what to do if your current plan is not returning for 2027.