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Medicare Enrollment Periods

Medicare Initial Enrollment Period
For most people, enrolling in Medicare Part A is automatic. However, there are several instances where you may have to manually enroll in Medicare Part A and/or Part B during your Initial Enrollment Period (IEP), the seven-month period that begins three months before you turn 65, includes the month of your 65th birthday, and ends three months later.

Some situations where you would enroll in Medicare during your initial enrollment include:

  • If you aren’t receiving retirement benefits:
    If you are not yet receiving retirement benefits and are close to turning 65, you can sign up for Medicare Part A and/or Part B during your IEP. If you decide to delay your Social Security retirement benefits or Railroad Retirement Benefits (RRB) beyond age 65, there is an option to enroll in just Medicare and apply for retirement benefits at a later time.
  • If you do not qualify for retirement benefits:
    If you are not eligible for retirement benefits from Social Security or the RRB, you will not be automatically enrolled into Original Medicare. However, you can still sign up for Medicare Part A and/or Part B during your IEP. You may not be able to get premium-free Medicare Part A, and the cost of your monthly Part A premium will depend on how long you worked and paid Medicare taxes. You will still have to pay a Medicare Part B premium.

Medicare General Enrollment Period
If you did not enroll during the IEP when you were first eligible, you can enroll during the General Enrollment Period. The general enrollment period for Original Medicare is from January 1 through March 31 of each year. Keep in mind that you may have to pay a late enrollment penalty for Medicare Part A and/or Part B if you did not sign up when you were first eligible.

Medicare Special Enrollment Period
You may choose not to enroll in Medicare Part B when you are first eligible because you are already covered by group medical insurance through an employer or union. If you lose your group insurance, or if you decide you want to switch from your group coverage to Medicare, you can sign up at any time that you are still covered by the group plan or during a Special Enrollment Period (SEP).

Your eight-month special enrollment period begins either the month that your employment ends or when your group health coverage ends, whichever occurs first. If you enroll during an SEP, you generally do not have to pay a late enrollment penalty.

The Special Enrollment Period does not apply if you’re eligible for Medicare because you have ESRD. Please also keep in mind that COBRA and retiree health coverage are not considered current employer coverage and would not qualify you for a special enrollment period.