Your Medicare number is on your Medicare card, in your online account, or available by phone from Medicare directly
Your Medicare number is a unique identifier that Medicare uses to track your coverage and claims. It appears on your physical Medicare card, which is the fastest place to look. If you do not have your card in front of you, you can retrieve your number through your online Medicare account, by calling Medicare, or by checking documents Medicare has sent you in the mail.
The number itself is 11 characters long — usually a Social Security number followed by a letter, though newer cards use a different format. You will need this number to schedule appointments, fill prescriptions, check claims, and verify coverage with providers.
Key Takeaways
- Your Medicare card is the quickest source — the number appears in the upper right corner on the front of the card.
- You can log into your Medicare account at Medicare.gov using your email and password to view your number anytime.
- Calling 1-800-MEDICARE (1-800-633-4227) will connect you to a representative who can read your number to you over the phone.
- If you have lost your card, you can request a replacement through your online account or by calling Medicare.
- Your Medicare number stays the same for life unless you report fraud or request a change.
Check your physical Medicare card first
If you have your Medicare card, your number is printed on the front in the upper right corner. The card is red, white, and blue. Older cards show your Social Security number followed by a letter (usually A, B, or D). Newer cards issued since 2018 use a Medicare Beneficiary Identifier (MBI) instead — a random 11-character code that does not contain your Social Security number.
The card also shows your name, date of birth, and the date your coverage began. If your card is damaged, faded, or lost, you can still retrieve your number through other methods without waiting for a replacement.
Log into your Medicare account online
Go to Medicare.gov and select "Log In" in the upper right corner. If you do not have an account, you can create one using your email address. You will need to verify your identity — Medicare will ask for your Social Security number, date of birth, and other personal details.
Once you are logged in, your Medicare number appears on your dashboard under "Your Medicare Information" or "Coverage." You can view it anytime without calling or waiting. This account also shows your claims, coverage details, and any notices Medicare has sent you.
Call Medicare directly for your number
Call 1-800-MEDICARE (1-800-633-4227). Representatives are available Monday through Friday, 8 a.m. to 8 p.m. Eastern time, and Saturday 9 a.m. to 1 p.m. Eastern time. Have your name, date of birth, and address ready. The representative will confirm your identity and read your Medicare number to you.
If you are deaf or hard of hearing, use the TTY number 1-877-486-2048. If you speak a language other than English, Medicare offers free interpretation services — tell the representative your language when you call.
Check documents Medicare sent you by mail
Medicare sends notices, explanation of benefits (EOB) statements, and coverage documents to your mailing address. Your Medicare number appears on nearly all of these documents. Look for recent mail from Medicare — usually in a blue envelope — and check the top or bottom of the first page.
If you have not received mail from Medicare in a while, your address on file may be outdated. You can update it through your online account or by calling 1-800-MEDICARE.
Request a replacement card if yours is lost or damaged
If you cannot locate your card and need a replacement, log into your Medicare account and select "Order a Replacement Card" or "Get a New Card." The replacement usually arrives within 7 to 10 business days. You can also call 1-800-MEDICARE to request one by phone.
While you wait for the replacement, you can still use your Medicare coverage — you just need your number, which you can retrieve through your online account or by calling. Providers can look up your coverage using your name and date of birth if you do not have your number memorized.
Understand the difference between old and new Medicare numbers
If you enrolled in Medicare before 2018, your card shows your Social Security number followed by a letter. These cards are still valid, but Medicare has been issuing new cards with a random Medicare Beneficiary Identifier (MBI) to protect your privacy. The MBI is 11 characters — a mix of numbers and letters — and does not contain personal information.
Both numbers are legitimate and work for the same purpose. Providers may ask for either one. If you have an older card, you do not have to replace it when ready, but you can request a new one anytime. Your Medicare coverage does not change when you switch to a new number.
Frequently Asked Questions
What if I cannot remember my Medicare.gov password?
Go to Medicare.gov and select "Log In." Click "Forgot your password?" and enter your email address. Medicare will send you a link to reset your password. If you do not remember your email, call 1-800-MEDICARE and a representative can help you regain access to your account.
Can I give my Medicare number to my doctor's office over the phone?
Yes. Doctors' offices, hospitals, and pharmacies regularly collect Medicare numbers over the phone to verify coverage and process claims. Make sure you are calling the official number listed on their website or your previous paperwork, not a number from an unsolicited call.
Is my Medicare number the same as my member ID?
No. Your Medicare number is issued by the federal government. If you also have a Medicare Advantage plan or Medigap policy, your insurance company will give you a separate member ID for that plan. You may need both numbers when dealing with your insurance company.
What should I do if I think someone has my Medicare number?
Call 1-800-MEDICARE right away and report the concern. You can also contact the Office of Inspector General at 1-800-HHS-TIPS (1-800-447-8477) to report suspected fraud. Monitor your Medicare claims through your online account to catch any unauthorized use.