Requesting/Replacing a Medicare CardI lost my Medicare Card. How do I get a new one? Contact the Social Security Administration at 1-800-772-1213 to ask for a new card or go online at Social Security. You can also print a copy of your Medicare card from your mymedicare.gov account.I recently moved. How do I change my address with Social Security and Medicare?Call the Social Security Administration at 1-800-772-1213 to make your address change. You can also go to www.ssa.gov. If you are a Railroad Retiree, call 1-800-808-0772.