A Medicare Special Enrollment Period (SEP) is a limited time to make certain Medicare plan changes, like joining, switching or dropping a Medicare Advantage (Part C) or Medicare prescription drug plan (Part D) outside the usual enrollment windows. You can qualify after certain life events, and the timing depends on the situation.
What do I need to know about a Medicare Special Enrollment Period?
A Medicare Special Enrollment Period may let you change plans when you have a qualifying life event, like moving or losing other coverage. Each SEP has a specific start date and end date, so it’s important to confirm your timeline before you enroll.
When is a Medicare Special Enrollment Period?
A Medicare Special Enrollment Period doesn’t have a single set date. It starts when certain life events happen, like moving or losing other coverage. Most Special Enrollment Periods last for a limited time after the event, so it’s important to confirm your timeline on Medicare.gov or in your plan materials before you enroll.
Common situations that trigger a Special Enrollment Period
Special Enrollment Periods are tied to life events, so the timing and the changes you can make depend on what happened. Below are common examples, but there are additional situations and rules.
Common SEP triggers may include:
- You moved, especially if you moved outside your plan’s service area or you have new plan options where you live. In many cases, this SEP begins the month before you move if you report it in advance and lasts for two full months after the month of your move.
- You lost other coverage, such as employer or union coverage, Medicaid or drug coverage that’s as good as Medicare Part D. In many cases, you have up to two months after your coverage ends to join a new plan.
- You gained or lost financial help that lowers your costs, like Medicaid or Extra Help for prescription drugs. If you qualify, you may be able to make changes to your coverage once per month while you have this help.
- You moved into, moved out of or lived in a facility like a nursing home or rehabilitation hospital. In some cases, living in a facility allows you to make plan changes at any time. Your chance to join, switch or drop coverage lasts as long as you live in the facility and continues for two full months after the month you move out of the facility.
- Your plan ended its contract with Medicare or Medicare took an official action related to your plan. In these cases, you are usually given a limited window, two months after you are notified, to choose new coverage.
- A major natural disaster affected your ability to enroll or switch Medicare plans. In these situations, Medicare may allow additional time beyond standard timelines, and the length can vary based on your location and the event.
What happens if you miss your Special Enrollment Period?
If your SEP ends before you make a change, you may have to wait for another Medicare enrollment period to join or switch plans. In the meantime, you can still use your Original Medicare Part A and B coverage and prepare for your next chance to enroll.
In some situations, missing the window can also change what coverage you have next. For example, if you’re in a Medicare Advantage plan and you move outside the plan’s service area, you may return to Original Medicare if you don’t join a new Medicare Advantage plan during that SEP.
If a plan ends its contract and you don’t pick a new Medicare Advantage plan in time, you may be enrolled in Original Medicare after your plan ends. Because details vary, confirm what will happen in your situation before the deadline passes.
How to use your Special Enrollment Period to enroll or change Medicare plans
Using an SEP usually comes down to three steps: confirm your SEP, choose the change you want to make and enroll. If you take it one step at a time, the process can feel more manageable.
Start by confirming:
What life event created your SEP
What changes you’re allowed to make (join, switch or drop coverage)
Your timeline and when the new coverage would start
Next, decide what type of coverage you want, like a Medicare Advantage (Part C) plan or a stand-alone Medicare prescription drug (Part D) plan.
When you’re ready to enroll, you may be able to use one of these options:
Enroll online
Enroll using a paper enrollment form
Enroll in person or by phone with a licensed agent
If you want to enroll in a Medicare Advantage plan, you generally need to be enrolled in Original Medicare (Parts A and B) first. If you aren’t enrolled yet, you will need to complete that step before you choose a Part C plan.
Ready to explore your options? Compare plans in your area and review benefits, costs, provider networks and drug coverage before you enroll. Explore Aetna® Medicare plans near you.
Commonly asked questions about Medicare Special Enrollment Period
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Yes, you may be able to. If you qualify for programs like Medicaid or Extra Help, you may have a Special Enrollment Period that lets you join or switch to a Medicare Advantage plan with drug coverage. The best plan for you depends on your doctors, prescriptions and costs, so it helps to compare your options before enrolling.
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If you qualify for a Special Enrollment Period, you can follow a few simple steps. First, confirm your eligibility and timeline. Then, review available plans in your area and choose one that fits your health needs and budget. When you’re ready, you can enroll online, by phone or with a licensed agent.
Learn more about options to enroll in an Aetna Medicare Advantage plan -
You may qualify for a Special Enrollment Period after certain life events, like moving, losing other coverage or gaining help with costs. Each situation has its own rules and timeline, so it’s important to confirm your eligibility first. Once you qualify, you can explore Medicare Advantage plans with drug coverage available where you live.
Explore available Aetna Medicare plans near you
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You may qualify for a Medicare Special Enrollment Period if you lost employer or union coverage connected to your spouse.
If you qualify, you may be able to join a Medicare Advantage plan with drug coverage or make other Medicare coverage changes.
As you compare plans, consider your doctors, prescriptions and monthly costs before enrolling.
