Close Icon Dismiss modal Close Icon Dismiss modal External Icon Link to an external resource Gear Icon Display options X Icon X Icon Plus Icon Minus Icon Arrow Right Arrow Left Arrow Up Arrow Down Calendar Edit Refresh First Last Question Info Block PDF PDF Document Word Word Document Excel Excel Document Powerpoint Powerpoint Document Active Checkbox Checked checkbox Active Radio Selected radio button Checkmark Error Warning Visibile Hidden

Welcome to Summit Health

Key dates to enroll

Depending on your circumstances, there are different enrollment periods for Medicare. You should know the following key dates before enrolling.

Initial enrollment period

You can enroll in Medicare during your initial enrollment period, which begins three months before your 65th birthday and ends three months after your birthday month. If you are under age 65, you may be able to enroll if you have a qualifying event. It’s important that you know that there may be penalties if you do not enroll. If you decide to delay enrollment, you may have to pay a lifetime late enrollment penalty.

Special enrollment period

If you have a qualifying event, you may qualify for special enrollment. You can use special enrollment to enroll in Medicare or make changes to your existing Medicare coverage. Qualifying events can include:

  • Change of address to a different service area
  • Losing current insurance or drug coverage
  • Any time you have a chance to get coverage from an employer, union or program
  • If Medicare changes its contract with your plan, making coverage unavailable


There are other qualifying events. To learn more, visit

Annual enrollment periods

If you are already enrolled in Original Medicare, Medicare Advantage or a stand-alone prescription drug plan, you can make changes to your coverage during the annual enrollment period. Annual enrollment is Oct. 15 to Dec. 7 every year. During annual enrollment:

Original Medicare members can:

  • Change to a Medicare Advantage plan

Medicare Advantage members can:

  • Change Medicare Advantage plans
  • Return to Original Medicare

Open enrollment period

If you are already enrolled in a Medicare Advantage plan, you can make changes to your coverage from Jan. 1 to March 31 every year. Medicare Advantage members can:
  • Change Medicare Advantage plans
  • Return to Original Medicare

General enrollment period

If you did not enroll during these other periods, you can enroll in Part A and/or Part B from Jan. 1 to March 31.

Last updated Nov. 6, 2020

Contact us

Have questions? We’re here to help. Call us today at 844-827-2355 (TTY users, please call 711). Our customer service team is available from 7 a.m. to 8 p.m., Pacific Time, seven days a week from Oct. 1 to March 31. After March 31, your call will be handled by our automated phone system on weekends and holidays.

Get more details