Short answer: Your window is 7 months around your 65th birthday — enroll in the first 3 months. And know Washington's advantage: once you have a Medigap plan B through N, WA lets you switch to another B-through-N plan any time, without health questions, so your Supplement rate is never a life sentence.
This one's personal — Washington is our home state. iCoach Solutions is headquartered in Tacoma, and most of our team lives and works right here in the South Sound. Here's the turning-65 playbook for Washingtonians.
Your 7-month Initial Enrollment Period
The window: 3 months before your birthday month, the month itself, and 3 months after. Enroll early for coverage that starts the first of your birthday month. Miss it without creditable coverage and the Part B penalty (10% per year, for life) and Part D penalty apply.
Medigap plans in Washington State: the switch rule
In most states, once your Medigap enrollment window passes, switching Supplement plans means health underwriting — and a possible decline if your health has changed. Washington law works differently. The state's Office of the Insurance Commissioner puts it plainly: if you already have a Medigap plan B through N, you can switch at any time to another plan B through N, and if you have Plan A, you can switch to another Plan A. Either way, you do not take a written health screening questionnaire. Practically, that means when your carrier raises rates, you can shop, a lever most of the country doesn't have.
Three details to know before you shop:
- Plans C and F are closed to newer enrollees. If you became eligible for Medicare on or after January 1, 2020, Washington's switch law lists Plans B, D, G (including high-deductible G), K, L, M and N for you (RCW 48.66.045).
- Coming from other coverage is different. Moving to Medigap from an employer plan or Medicare Advantage, the Commissioner says rules vary and an insurer may require the health questionnaire, unless you have a guaranteed-issue right. Ask before you cancel anything.
- Keep the old plan until the new one sticks. Medicare gives you a 30-day free look at a new Medigap policy; Medicare.gov says to keep the first one until you have decided to keep the second, and you pay both premiums for the month you have both.
How Medigap prices are set in Washington
Washington requires every Medigap insurer to set rates on a community-rated basis (RCW 48.66.045). Everyone with the same plan from the same insurer pays the same premium, whatever their age or health; the only differences allowed are discounts for spouses or for how you pay, and a separate rate pool for people on Medicare because of a disability. So your premium does not climb because you had a birthday. It moves when the insurer raises the rate for everyone on that plan, and that is exactly when the switch rule pays off.
Because Medigap plans are standardized, a Plan G pays the same benefits whichever company sells it, so the comparison comes down to price, the company's rate history and service. The Commissioner publishes the full list of approved Medigap plans and their monthly premiums, by company. We do not offer every plan on that list, and we will tell you which ones we do.
Advantage vs. Original + Supplement in Washington
From Seattle and Tacoma to Spokane, Washington's Advantage plans are competitive — but network fit matters across our hospital systems (MultiCare, Virginia Mason Franciscan, UW Medicine, Providence). Original Medicare + a Supplement opens nearly every door, and thanks to the switch rule, your Supplement choice stays flexible.
Already on Medicare? Your yearly chance to change Medicare Advantage and Part D plans is open enrollment, October 15 to December 7. Medigap switches in Washington are not tied to that window. For a second look at your 2027 options, book a free plan review with our Tacoma-based team.
Free, local help — we're literally here
We're not a call center in another time zone. iCoach Solutions is headquartered in Tacoma with licensed agents across Washington — meet the team on our Washington page, or see our local pages for Tacoma, Puyallup, Olympia, and more South Sound cities. The state also offers SHIBA, Washington's free counseling program. Map your dates with our free Medicare Readiness Timeline.
Wherever you are in Washington, our guide to finding a Medicare agent near you covers what to ask any agent, including us, before you enroll.
Turning 65 in Washington? Talk to your home-state team — free.Tacoma-based, licensed across WA, English & Español. Book online or call (253) 453-5885 →iCoach Solutions is an independent insurance agency headquartered in Tacoma, WA. We do not offer every plan available in your area. Not affiliated with or endorsed by the U.S. Government or the federal Medicare program. Medigap switching rules have plan-level details — confirm your specific situation before changing plans.