If your Medicare Advantage plan is closing outright, you already know to look for a new one. This is about the far more common case: your plan keeps its name, keeps operating, and mails you an Annual Notice of Change anyway, listing what's different about it next year.
By September 30, every Medicare Advantage plan sends this notice, whether it's changing a little or a lot. Most retirees open the envelope, see a wall of small print, and set it aside. If you never get back to it, you don't keep this year's plan. You're automatically re-enrolled in whatever version the notice described, changes included.
Decision
What would actually make you switch?
Pick the change that would matter most to you, so the checklist below focuses on it.
Read These Four Sections First
An Annual Notice of Change follows roughly the same layout every year: what your premium and deductible will be, which providers are in network, what's on the drug list and at what cost tier, and what extra benefits like dental or transportation look like. Plans bury the changes that matter inside sections that sound routine.
Skim the whole notice once, then go back and read these four sections slowly, comparing each one to what you have right now rather than trusting the plan's own summary of what changed.
Why Doing Nothing Isn't Neutral
Medicare treats silence as acceptance. If you don't act on your notice, your plan carries you into next year exactly as described, cost increases, network changes, and all. There's no grace period where you keep this year's terms by default while you decide.
That's the part that catches people off guard. A plan that raised a copay or dropped a specialist from its network isn't required to call and warn you. It already told you in the notice you set aside.
Know what to ask before you call Medicare or Social Security.
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Prepare short, specific Medicare or Social Security questions before your next call.
Checklist
Locate these four sections in your notice
Check each one off as you find and read it.
0 of 4 done.
Checklist
Double-check your prescription costs
Do this for every medication you take regularly, including any you might forget to check.
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Timeline
Work the two deadlines in order
Check off each step as you complete it.
Read the full notice in addition to the summary, even if you expect no changes.
Finish your comparison so you're not researching for the first time once enrollment opens.
This is the only standard window to change plans for coverage starting January 1.
Whatever you chose, or didn't choose, becomes your coverage starting this day.
Checklist
Before you enroll in a replacement plan
Confirm each one by name, not by assuming it carries over from your current plan.
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Save what you found in your notice so you're ready before enrollment opens.
Your Two Deadlines
Two dates matter here, and they're not the same one. Your notice arrives by September 30, but the window to actually act on it, by switching to a different plan or to Original Medicare, is Medicare's Annual Enrollment Period, October 15 through December 7. After December 7, you're generally locked in for the year, with only limited exceptions.
Give yourself time to read the notice before the enrollment window opens, not during it. That way you're comparing plans with a clear list of what changed, instead of skimming both at once under a deadline.
If You Decide to Switch
If your notice turned up a change you can't live with, the enrollment window is your only standard chance to act until next fall. Your Medicare Advantage Plan Might Not Exist Next Year walks through comparing a replacement plan's network, drug list, and extra benefits in more depth.
