Medicare Advantage

Medicare in Juneau: Which Enrollment Window Is Yours?

# Medicare Advantage or Medigap? Understanding the two paths in…

JUNEAU, Alaska — Choosing between Original Medicare with a Medigap policy and a Medicare Advantage plan is one of the biggest decisions you'll make about your coverage. But here in Juneau, the choice often comes down to something less talked about: timing. Miss the right window, and the door to one path can quietly close — or get much harder to walk through.

This guide focuses on the enrollment dates that shape your options in Juneau City and Borough for 2027, so you know which window is yours and what happens if it passes.

The two paths, in one paragraph

Original Medicare (Parts A and B) is the federal program. Many people pair it with a stand-alone Part D drug plan and a Medigap (Medicare Supplement) policy that helps with cost-sharing. Medicare Advantage (Part C) is an all-in-one alternative offered by private insurers approved by Medicare, usually including drug coverage. Both paths are available to people in Juneau City and Borough, and the number of Medicare Advantage and Part D plans offered in the borough is set at the county level and updated each fall by CMS. The 2027 lineup is detailed in each plan's Annual Notice of Change and on the Medicare Plan Finder at medicare.gov.

Window 1: Your Initial Enrollment Period (IEP)

Your IEP is a seven-month stretch — the three months before your 65th birthday month, the month itself, and the three months after. This is the simplest time to choose your path, because:

• You can enroll in Part A and Part B.
• You can pick up a Medicare Advantage plan or a stand-alone Part D drug plan.
• You unlock your one-time Medigap Open Enrollment window (more on that below).

If you miss your IEP and don't have other qualifying coverage, you may face a late enrollment penalty for Part B or Part D that sticks with you for as long as you have Medicare.

Window 2: The Medigap Open Enrollment Period

This is the window most people don't hear enough about. It's a six-month period that starts the month you're 65 or older AND enrolled in Part B. During this window, insurers must sell you any Medigap policy they offer, at their best available rate, no matter your health.

Miss this window, and in most states — Alaska included — insurers can use medical underwriting. That means they can ask about your health, charge more, or turn you down. So if you think you might ever want Medigap, this is the moment to pay attention. Once it's gone, switching from Medicare Advantage back to Original Medicare with a Medigap policy can get complicated.

Window 3: Annual Enrollment Period (Oct. 15 – Dec. 7)

Every fall, all people with Medicare can review their coverage and make changes for the coming year. During AEP you can:

• Switch from Original Medicare to a Medicare Advantage plan, or vice versa.
• Change from one Medicare Advantage plan to another.
• Join, drop, or switch a Part D drug plan.

Changes take effect January 1. This is the main window most Juneau residents will use year after year.

Window 4: Medicare Advantage Open Enrollment (Jan. 1 – March 31)

If you're already in a Medicare Advantage plan on January 1, you get one more chance in the new year to switch to a different Medicare Advantage plan or drop back to Original Medicare (and pick up a stand-alone Part D plan). You can only make one change during this window, and it doesn't let you jump from Original Medicare into an Advantage plan. Important: leaving Advantage during this period does not guarantee you a Medigap policy without underwriting.

Special Enrollment Periods

Life events can open extra windows. Losing employer coverage, moving out of your plan's service area, qualifying for Extra Help, or moving into or out of a nursing facility can all trigger a Special Enrollment Period. If any of these apply to you, don't wait — SEPs have their own short deadlines.

How the dates interact

Here's the piece that trips people up: these windows overlap and stack on each other in ways that matter.

• Your IEP and your Medigap Open Enrollment window can run at the same time, but they end on different clocks.
• Picking a Medicare Advantage plan during your IEP does not cancel or extend your Medigap window.
• AEP (fall) and Medicare Advantage OEP (winter/spring) can look similar, but only AEP lets someone on Original Medicare join an Advantage plan.
• A few program-level facts to keep in mind for 2026: the Part D out-of-pocket cap is $2,100, the maximum Part D deductible is $615, the coverage gap has been eliminated, and IRMAA surcharges for higher-income enrollees begin above $109,000 for a single filer.

What to do before your window closes

1. Mark your dates. Put your IEP, Medigap window, and AEP on a calendar. 2. Compare plans offered in Juneau City and Borough on medicare.gov's Plan Finder. 3. Call 1-800-MEDICARE (TTY 1-877-486-2048) for official answers. 4. Contact Alaska's State Health Insurance Assistance Program — the Alaska Medicare Information Office — for free, unbiased local help.