When to Join


You'll have many dates to keep track of before your 65th birthday. Here's a reminder on Medicare Part A and B timelines.

Medicare Part A — Hospital

If you're paid Social Security benefits, Part A benefits will start on the first day of the month you turn 65.

Medicare Part B — Medical

You'll have three opportunities to sign up for Part B:


Initial Enrollment Period (IEP) Annual Enrollment Period (AEP) Special Enrollment Period (SEP)




Seven months that include:

  • Three months before your 65th birthday month
  • Your 65th birthday month
  • Three months after your 65th birthday month


October 15-December 7


Certain situations may allow you to:

  • Join,
  • Switch, or
  • Drop a Medicare Plan