If your Medicare card was lost, stolen, or destroyed, you can ask for a replacement card from Social Security in three ways:
Once you’re logged in, select the "Replace your Medicare card” link under the Medicare Enrollment Detail section. Then select “Mail my replacement Medicare Card.”
You can also print an official copy of your card from your secure Medicare account or call 1-800-MEDICARE (1-800-633-4227). TTY users can call 1-877-486-2048.