Medicare General Enrollment Period | AARP® Medicare Plans from UnitedHealthcare®

Medicare General Enrollment Period

Questions? Call UnitedHealthcare toll-free at: 1-800-000-0000 (TTY 711)

Hours: 8 a.m. – 8 p.m. local time, 7 days a week

Need help?Chat
live with a sales agent.

Miss your Initial Enrollment Period? You may still have time to enroll in Medicare.


The General Enrollment Period (GEP) is like make-up time. It’s when you can enroll in Part A, Part B or both if you didn’t sign up during your Initial Enrollment Period. In some situations, you may have to pay a penalty for late enrollment.

The GEP runs from January 1 through March 31 every year. Coverage that you sign up for during this time takes effect on the following July 1.

What you can do during the General Enrollment Period

Here’s what you can do during General Enrollment Period.

  • You can enroll in Part A, Part B or both.
  • If you enroll in both Part A and Part B and want a Medicare Advantage plan or prescription drug coverage, you need to wait until Medicare Open Enrollment. Open enrollment is October 15 through December 7 every year.

What do you want to do next?


Or learn about Medicare coverage choices