The GEP is January 1 – March 31 every year. Here’s what you need to know:
- You can enroll in Part A, Part B or both during this time.
- Coverage begins on July 1 of the same year.
- You may have to pay a late enrollment penalty.
- You may be eligible enroll in a Medicare Advantage (Part C) or a prescription drug (Part D) plan April 1 – June 30 of the same year.

What Happens If You Miss Your Medicare Initial Enrollment Period (IEP)?
It’s important to be aware of what can happen if you miss your Initial Enrollment Period (IEP) for Medicare.
Once you’re enrolled in Parts A and B, you have a chance to change plans once a year during Medicare Open Enrollment, Oct. 15 – Dec. 7. You may also qualify for a Medicare Special Enrollment Period (SEP). A SEP allows you to change plans outside of Medicare Open Enrollment in certain situations, such as if you move.