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Medicare Enrollment

This page covers some helpful questions to ask when preparing to enroll in a Medicare plan. See the answers to each one below.

You can enroll in a Medicare plan during one of the following four enrollment periods:


  • Initial Enrollment Period (IEP), which begins when you’re first eligible for Medicare
  • Annual Enrollment Period (AEP), which occurs from October 15 through December 7
  • Medicare Advantage Open Enrollment Period (OEP), from January 1 through March 31
  • Special Enrollment Period (SEP), during specific personal circumstances

Read more about each of these enrollment periods in the questions below. You can also visit our When to enroll page for more information.

You may join, switch or disenroll from your current Medicare plan during Medicare's Annual Enrollment Period (AEP), or if you meet certain circumstances during the Medicare Advantage Open Enrollment Period (OEP). You may also make changes to your Medicare coverage during a Special Enrollment Period (SEP), when certain events happen in your life.


For more information on what you can do during different enrollment periods, see the previous questions on this page.

When you enter an enrollment period, there are a few steps you can take to enroll. You can choose one of the following Medicare enrollment options:


  1. Enroll on
  2. Enroll on
  3. Enroll using the plan’s paper enrollment form
  4. Enroll by calling Allina Health | Aetna Medicare at ${dynamicPhone} ${tty}, ${hours}

The Part D late enrollment penalty is an amount that’s permanently added to your monthly Part D premium if:


  • You don’t sign up when you’re first eligible for Medicare, and
  • You don’t have similar drug coverage (coverage as good as Medicare’s)

For more information, please refer to your Evidence of Coverage.

More questions? We've got answers

Find a plan

Enter a zip code to find a Medicare plan near you.

Get help with enrollment

Talk to a licensed agent at ${dynamicPhone} ${tty}, ${hours}.


Other ways to contact us