Some individuals are auto enrolled in different parts of Original Medicare. Original Medicare includes Medicare Part A and Part B.

Whether you're one of those individuals depends on your situation.

You'll be auto enrolled in Medicare Part A and Part B if:

• You're 65, and already receiving benefits from Social Security or the Railroad Retirement Board.
  
• You're younger than 65, have a disability and have been receiving disability benefits for 24 months through Social Security or the Railroad Retirement Board. 
• You have Lou Gehrig's disease, also known as Amyotrophic Lateral Sclerosis. 

You'll be auto enrolled in Medicare Part A if: 

• You're 65, live in Puerto Rico and are currently receiving Social Security or Railroad Retirement Board benefits. 

You'll be auto enrolled in Medicare Part B if: 

• You're getting disability benefits when you turn 65, and already have Part A Medicare. 

You'll be auto enrolled in Medicare Part D prescription drug coverage if:

• You're part of the government Low-Income Subsidy program because you qualify for Medicare and Medicaid.
• You're currently receiving Supplemental Security Income.

If none of the above situations apply to you, you need to enroll in Medicare during your Medicare initial enrollment period.