Everyone who enrolls in Medicare also receives a Medicare card, also know as the red, white, and blue card. It lists your name and the dates that your Original Medicare hospital insurance (Part A) and medical insurance (Part B) began. It also shows your Medicare claim number, which is the same as your Social Security number and identifies you in the Medicare system. If you get Medicare through the Railroad Retirement Board, your card will say “Railroad Retirement Board” at the top. If you choose to get your Medicare benefits from a Medicare Advantage Plan, you will use your plan’s card instead of the Medicare card. See also: Private Plan Card.