Determine when your Medicare Initial Enrollment Period (IEP) begins. Your IEP is a seven-month period, including the three months before, the month of, and the three months following your 65th birthday. The date when your Medicare coverage begins depends on when you sign up.
If you missed your IEP, you may be able to enroll in Medicare during a different enrollment period. If you are under 65 and eligible for Medicare because of a disability, you should be automatically enrolled.