Make room in your wallet: You may actually have several Medicare-related health insurance cards to carry. You’ll have a separate card if you’re enrolled in a Medicare Advantage or Medigap plan. And if you have a separate Part D prescription drug plan, you’ll have a card for that, too.
Important note: Your Social Security number is printed on your Original Medicare card. To avoid identity theft, never let anyone else use your card, don’t give it out to anyone who calls (unless you’ve requested phone assistance from Medicare or are signing up for a plan by phone) or comes to your home uninvited, and consider writing “See ID” in the signature line on your card. Your health-care providers and the stores where you shop will then have to ask for a picture ID to confirm that you’re the cardholder.