Language assistance and auxiliary aids are available free of charge. Español · More languages

When can I switch my Medicare plan?

Most people think you can only change your Medicare plan during the fall enrollment window. The truth is more flexible than that — and a quick call to a licensed agent often uncovers a Special Enrollment Period people didn't know they qualified for. Call us at 1-866-531-6565 or read on for the full picture.

Start Here

Start here: a quick call can save you weeks of guessing

If you're trying to figure out whether you can switch your Medicare plan right now, the fastest way to get a real answer is to call a licensed agent. Here's why:

The standard enrollment windows are public information — we'll walk through all of them below. But the harder question is whether you personally qualify for a Special Enrollment Period (SEP) based on something happening in your life. There are dozens of triggers for SEPs, some of them aren't well-known, and the rules around them change. People miss SEPs they qualify for all the time because they didn't know to ask.

A 10-minute call clears this up. We'll ask you a few questions about your situation, your timing, and what's changed in your life. If there's a window open for you right now, we'll find it. If there isn't, we'll tell you when the next one opens and what to do in the meantime.

No cost. No pressure. No obligation to enroll in anything.

Toll-free — Mon–Fri 8am–8pm CT. By calling, you'll be connected to a licensed insurance agent.

Call 1-866-531-6565
The Basics

Why Medicare has enrollment windows in the first place

Medicare uses enrollment windows for one main reason: to keep the system stable for everyone in it. If people could switch plans whenever they wanted, healthy people would jump to cheap plans and only switch to richer plans when they got sick. That would break the math the whole program runs on.

So Medicare sets specific windows during the year when changes are allowed. Outside those windows, you generally can't switch — unless something in your life triggers a Special Enrollment Period.

There are five enrollment-period concepts you should know:

  1. 1

    The Annual Election Period (AEP) — the big fall window most people have heard of

  2. 2

    The Medicare Advantage Open Enrollment Period (MA-OEP) — the spring window for people already on Medicare Advantage

  3. 3

    The Medigap Open Enrollment Period — a one-time, six-month window when you first get Part B

  4. 4

    Special Enrollment Periods (SEPs) — triggered by specific life events at any time of year

  5. 5

    The Initial Enrollment Period (IEP) — your first 7-month window when you turn 65

Annual Election Period

The Annual Election Period (AEP) — October 15 to December 7

Oct 15 – Dec 7 · Every year

This is the big one. Every year, from October 15 through December 7, anyone on Medicare can make changes to their Medicare Advantage and Part D coverage. Whatever you change takes effect on January 1.

During AEP, you can:

What AEP is not for:

  • Medigap plans — the fall enrollment window does not give you special rights to buy or switch Medicare Supplement plans. Medigap has its own enrollment rules covered below.

Every September, your current carrier sends you something called the Annual Notice of Change — a booklet that spells out exactly how your plan is changing for the upcoming year. Premium changes. Formulary changes. Tier changes. New utilization rules. Most people don't read it.

They should. The plan that fits you this year might not fit you next year. AEP is when you do something about it. Even if you ultimately keep your current plan, doing a yearly review during AEP is one of the cleanest ways to make sure you're not slowly drifting onto a worse plan as the carrier makes changes.

Got your Annual Notice of Change in the mail? We do free reviews during AEP every year.

Call 1-866-531-6565
MA Open Enrollment Period

The Medicare Advantage Open Enrollment Period (MA-OEP) — January 1 to March 31

Jan 1 – Mar 31 · Every year

This one is for people already on a Medicare Advantage plan who decide it's not working out. If you enrolled last fall and discovered something you don't like — your doctor isn't in-network, your prescriptions aren't covered the way you expected — MA-OEP gives you a window to fix it.

During MA-OEP, you can:

  • Switch from your current Medicare Advantage plan to a different Medicare Advantage plan
  • Drop your Medicare Advantage plan entirely and return to Original Medicare (and enroll in a stand-alone Part D plan during the same window)

What MA-OEP is not for:

  • Switching from Original Medicare to a Medicare Advantage plan (requires AEP or an SEP)
  • Changing Part D plans on their own (also requires AEP or an SEP)
  • Buying or switching Medigap plans (different rules)
MA-OEP is one of the most underused windows in Medicare. If you signed up for a Medicare Advantage plan last fall and you're already regretting it, this is your second chance.
Medicare Supplement

Medigap enrollment is different — and timing really matters

One-time · 6 months from Part B start

Medicare Supplement plans (Medigap) don't follow the same enrollment calendar as Medicare Advantage and Part D. This trips people up constantly.

When your Medicare Part B becomes effective — usually around your 65th birthday — you get a one-time, six-month window to buy any Medigap plan from any carrier with no health questions asked. They cannot deny you, charge you more for health reasons, or impose waiting periods.

This is the most underrated window in Medicare. It's the only time most people have guaranteed access to any Medigap plan they want.

Outside that window:

  • In most states, you can apply for a Medigap plan any time of year — but the carrier can ask health questions and decide whether to offer you a policy. This is called medical underwriting. Some people qualify without issue. Others get denied or rated up because of their health.
  • A few states have additional protections that make Medigap easier to get year-round, like New York and Connecticut. The rules vary state by state, and they change.
Guaranteed Issue Rights: In specific situations — like losing other coverage involuntarily, moving out of a Medicare Advantage plan's service area, or qualifying for a trial right — you may have a Guaranteed Issue right to buy certain Medigap plans without underwriting. The rules are specific and the windows are short. If you think you might have a Guaranteed Issue right, call us at 1-866-531-6565.
Special Enrollment Periods

Special Enrollment Periods — the windows most people don't know exist

Special Enrollment Periods (SEPs) are windows triggered by specific life events that let you enroll in or change Medicare Advantage and Part D coverage outside the standard windows. There are over a dozen different SEP triggers, and most people have never heard of most of them.

You moved. Moving to a new permanent address — even within the same state — may trigger an SEP because your old plan may not be available where you live now.

You lost other coverage. Losing creditable coverage from an employer, union, COBRA, or another source typically gives you an SEP to enroll in Medicare Advantage or Part D.

You qualify for Extra Help or Medicaid. People who qualify for the Extra Help program (Low Income Subsidy for Part D) or for full Medicaid get an SEP that resets each calendar quarter for the first three quarters of the year.

Your plan changed its contract with Medicare. If your Medicare Advantage or Part D plan is leaving Medicare or Medicare ended its contract with the plan, you get an SEP to enroll in something else.

You entered, lived in, or left a long-term care facility. Skilled nursing facilities, nursing homes, and certain other institutional settings trigger an SEP.

Your plan was sanctioned or rated poorly. If your current plan has been sanctioned by Medicare or received a low star rating, you may have an SEP to switch to a higher-rated plan.

Other SEP triggers include returning to the U.S. after living abroad, being released from incarceration, becoming newly eligible for Medicare under disability rules, and several more situational scenarios.

Why this matters: SEPs typically last 2 to 3 months from the triggering event. If you wait, you can lose the window. Most people don't know they qualified for an SEP until well after it closed.

Think something might have changed in your life that qualifies you for an SEP? That's exactly the kind of thing we figure out on a quick call — no cost, no pressure.

Call 1-866-531-6565
Initial Enrollment Period

Your Initial Enrollment Period (IEP) — only happens once

7 months · Around your 65th birthday

This one is for people new to Medicare. Your Initial Enrollment Period is the 7-month window — three months before, the month of, and three months after your 65th birthday.

During your IEP, you can:

Missing your IEP can cost you money for the rest of your life through late enrollment penalties. If you're approaching 65 and haven't enrolled yet, that's a conversation to have now, not later. We have a full guide for people in this situation — see our New to Medicare guide for the details.
How It Works

How working with Clarity65 actually goes

Tell us your situation

Your ZIP, your current coverage, what's changed in your life, and what you're trying to figure out. Anything you can share about recent moves, coverage changes, or life events helps us figure out which windows are open for you.

We figure out which windows apply

A licensed agent looks at your situation against the full list of enrollment periods and SEPs. If there's a window open for you right now, we'll find it.

If we can help, we walk through your options

If you have a window open and you want to look at different plans, we compare what's available across the carriers we represent. You decide what fits. We handle enrollment.

It costs you nothing. We're paid by the carrier you enroll with. Your premium is the same whether you enroll through us, through the carrier directly, or through anyone else.

Common Questions

Common questions about switching plans

Can I switch my Medicare plan whenever I want?
No. Medicare uses specific enrollment windows during the year. The most common one is the Annual Election Period (October 15 – December 7), which lets most people change Medicare Advantage and Part D plans. Outside of that, you generally need to qualify for a Special Enrollment Period based on a specific life event. The honest answer to "can I switch right now" usually requires a quick conversation about your situation.
What's the difference between AEP and MA-OEP?
AEP (October 15 – December 7) is the big fall window where anyone on Medicare can change Medicare Advantage or Part D plans. MA-OEP (January 1 – March 31) is a smaller window specifically for people already on a Medicare Advantage plan who want to switch to a different MA plan or go back to Original Medicare. AEP affects almost everyone; MA-OEP only affects current MA enrollees.
How do I know if I qualify for a Special Enrollment Period?
This is the question we get most. The most reliable way to know is to call us. SEPs are triggered by specific life events — moving, losing coverage, qualifying for assistance programs, and many others. Most SEPs last 2 to 3 months from the triggering event, so if something has changed in your life recently, don't wait too long to find out whether you qualify.
Can I switch Medigap plans during AEP?
AEP doesn't grant any special rights for Medigap. Outside your one-time six-month Medigap Open Enrollment Period when you first get Part B, switching Medigap plans generally requires medical underwriting in most states — meaning the carrier can ask health questions and decide whether to offer you a policy. There are exceptions in certain states and in certain Guaranteed Issue situations. This is something to talk through with a licensed agent.
I moved. Can I switch plans?
Probably yes. Moving to a new permanent address typically triggers a Special Enrollment Period because your old Medicare Advantage or Part D plan may not be available where you live now. The window usually lasts about 3 months. Call us and we'll confirm whether you qualify and walk through your options in the new area.
I just retired. Can I switch plans?
Probably yes. Losing creditable coverage from an employer or retiree plan typically triggers a Special Enrollment Period that gives you a window to enroll in Medicare Advantage or Part D without a late enrollment penalty. The window is usually about 2 months from when the employer coverage ends. The sooner you call, the cleaner the transition.
My current plan got worse this year. Can I switch?
If the change is happening at the start of a new calendar year, AEP (October 15 – December 7 of the prior year) is when most people would have switched. If your plan is currently in the middle of its year and you missed AEP, you generally have to wait — unless you qualify for a Special Enrollment Period or have an MA-OEP option. We can tell you which one applies to your situation.
What if I want help reviewing my current plan but I'm not sure I want to switch?
That's completely fine. A free plan review is exactly that — a review. We look at what you have, what's changing, and what other options exist. You decide whether to do anything with the information. Most people who call for a review don't switch. They just leave the call knowing their current plan still fits, which is genuinely useful.

Not sure which window applies to you?

That's the most common reason people call us. Five minutes on the phone, no pressure, no obligation. We'll tell you exactly where you stand.

By calling the number above, you will be connected to a licensed insurance agent. Mon–Fri 8am–8pm CT.