Title: Get Started With Medicare | Your Medicare Card
Article Snip: "...
Your card has a Medicare Number that’s unique to you — it’s not your Social Security Number. This helps protect your identity.
The card shows:
You have Medicare Part A (listed as HOSPITAL), Part B (listed as MEDICAL), or both.
The date your coverage begins.
Once you’re signed up for Medicare, we’ll mail you your Medicare card in your welcome packet. You can also log into (or create) your secure Medicare account to print your official Medicare card.
..."
Reference: www.medicare.gov