Some people get Part A and Part B automatically
If you’re already getting benefits from Social Security or the Railroad Retirement Board (RRB), you’ll automatically get Part A and Part B starting the first day of the month you turn 65. (If your birthday is on the first day of the month, Part A and Part B will start the first day of the prior month.)
If you’re under 65 and disabled, you’ll automatically get Part A and Part B after you get disability benefits from Social Security for 24 months or certain disability benefits from the RRB for 24 months.
If you’re automatically enrolled, you’ll get your red, white, and blue Medicare card in the mail 3 months before your 65th birthday or 25th month of disability benefits. If you’re going to wait to get Part B, follow the instructions that come with the card, and send the card back. If you keep the card, you keep Part B and will pay Part B premiums. See
pages 22–23 for help deciding if you should wait to get Part B.
If you have ALS (Amyotrophic Lateral Sclerosis, also called Lou Gehrig’s disease), you’ll get Part A and Part B automatically the month your disability benefits begin.