Medicare has a handful of windows, and a couple you only get one shot at. Tell us where you are and we'll map yours — what's open now, and what's worth not leaving to the last minute. Nothing here is a recommendation; it's the conversation an unbiased guide would walk you through.
Your map
A map shows you where the doors are. Whether to walk through one is a conversation, not a calculation.
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* State rules vary — some add Medigap rights beyond the federal ones, like a yearly or birthday-rule window or year-round guaranteed issue. Research your state's specific options, or ask Fern.
When is my Medigap open enrollment window?
It's the six-month period that starts the month you're 65 or older and enrolled in Part B. During it, you can buy any Medigap policy sold in your state at the best rate, with no health questions. It happens once and doesn't repeat.
What happens if I miss my Medigap window?
Outside that window (and outside specific guaranteed-issue situations), insurers in most states can review your health and charge you more or turn you down. A few states have more generous ongoing rules — the tool flags whether yours is one.
Can I still get a supplement after leaving Medicare Advantage?
Sometimes, yes — there's a 12-month trial right the first time you try Advantage, and some other guaranteed-issue situations. A closed window isn't always the end, which is exactly what this tool helps you check.
Refined reference build of Tool 1. Logic & copy are carried over verbatim from the verified prototype (CMS / Medicare.gov / SSA + Fact Log, June 2026). Rebuild in Astro with real Brevo + analytics + server-side validation; this file is the behavior + design spec.
// STUB in submitKeepCopy() — POST email + result payload to Brevo, tag into the lead-gen/nurture track (confirm tag with founder), ideally email the personalized result. Validate server-side too.#fernLink currently → /fern; confirm the canonical Fern member-page URL.track() stub fires — situation_selected, result_shown (situation+status), keep_copy_submitted, meet_fern_clicked. Wire to the chosen analytics convention.ANNUAL (year label + per-state examples). Keep this pattern; tie it to the Fact Log. Tool 1 is almost entirely evergreen.ANNUAL.extraProtectionStatesExamples when ready.aria-live result region with focus moved to the result heading, AA contrast.