Where Your Medicare Number Appears
Your Medicare number is printed on your Medicare card, which arrives in the mail when you first become may be able to access. The number appears in the upper left corner of the card, followed by a letter. If you have your card in front of you, that is the fastest way to find it.
If you cannot locate your card, your Medicare number also appears on documents Medicare sends you by mail — including your initial may be able to access notice, any notices about coverage changes, and bills or explanations of benefits from doctors or hospitals. Check any official mail from Medicare or your provider from the past year.
You can also look up your number online through your personal Medicare account, by phone, or by visiting a Social Security office in person. Each method takes a different amount of time and requires different information from you.
Key Takeaways
- Your Medicare number is printed on your Medicare card in the upper left corner, and this is the quickest place to find it if you have the card.
- You can look up your number online at Medicare.gov using your Social Security number and date of birth, without calling anyone.
- Medicare customer service can tell you your number by phone at 1-800-MEDICARE if you have your Social Security number and can answer security questions.
- A local Social Security office can print your Medicare number for you in person if you bring a photo ID and proof of citizenship.
- Your Medicare number appears on any official mail from Medicare or your healthcare providers, including bills and coverage notices.
Looking Up Your Number Online
The fastest way to find your Medicare number without calling is to create or log into your account at Medicare.gov. Go to the homepage and look for the "Sign In" button in the upper right corner. You will need your Social Security number, date of birth, and an email address.
If you do not already have a Medicare.gov account, you can create one by clicking "Create an account" and following the steps. The site will ask you to verify your identity by answering security questions or confirming information from your credit report. Once you are logged in, your Medicare number appears on your account dashboard under "Your Medicare Information."
This method works any time of day or night and does not require you to speak with anyone. If you have trouble logging in or creating an account, Medicare has a help desk available by phone at 1-800-MEDICARE during business hours.
Calling Medicare Customer Service
You can reach Medicare by phone at 1-800-MEDICARE (1-800-633-4227). Have your Social Security number ready before you call. A representative will ask you to confirm your date of birth and may ask other security questions to verify your identity.
Medicare customer service is available Monday through Friday, 8 a.m. to 8 p.m. Eastern time. Wait times are often shorter early in the morning or late in the afternoon. If you are deaf or hard of hearing, you can use TTY at 1-877-486-2048.
The representative will read your Medicare number to you over the phone. Ask them to spell it out if you need to write it down, and confirm you have it correct before you hang up.
Visiting a Social Security Office
You can walk into any Social Security office and ask for your Medicare number. Bring a photo ID (driver's license, passport, or state ID) and proof of citizenship (birth certificate, naturalization papers, or passport). The office staff will look up your number and can print it for you on the spot.
To find the office nearest you, go to ssa.gov/locator and enter your zip code. Some offices require you to take a number and wait; others let you make an appointment online. Calling ahead to ask about wait times can save you a trip.
Social Security offices are open Monday through Friday, 9 a.m. to 4 p.m., though hours vary by location. Bring all your documents with you — staff cannot hold your information and call you back later.
What to Do If You Cannot Find Your Number
If you have lost your Medicare card and do not have a copy of your number written down, the online method through Medicare.gov is usually fastest because you do not have to wait on hold. If you do not have internet access or feel uncomfortable creating an online account, calling 1-800-MEDICARE is the next quickest option.
If you are having trouble remembering your Social Security number or date of birth, bring those documents with you to a Social Security office. Staff there can help you locate the information you need to look up your Medicare number.
Do not give your Medicare number to anyone who calls you unsolicited or sends you an unsolicited email or text. Medicare will never ask for your number this way. If someone contacts you claiming to be from Medicare and asking for your number, hang up or delete the message and call 1-800-MEDICARE yourself to report it.
Understanding Your Medicare Number Format
Your Medicare number is 11 characters long: nine digits followed by a two-letter suffix. For example, it might look like 123-45-6789-AB. The first nine digits are your Social Security number. The two letters at the end indicate your relationship to the person who originally claimed Social Security benefits — usually A for the person themselves, B for a spouse, or another letter for a dependent.
When you give your Medicare number to a doctor's office, hospital, or insurance company, include both the digits and the letters. The letters matter for billing and coverage, so do not leave them off.
If you have both Original Medicare and a Medicare Advantage plan, you have only one Medicare number. It covers both types of coverage. You do not need separate numbers for different parts of Medicare.
Frequently Asked Questions
What if I do not have internet access to look up my number online?
Call 1-800-MEDICARE and have your Social Security number ready. A representative can tell you your Medicare number over the phone. If you do not have a phone, visit a local Social Security office with your photo ID and proof of citizenship.
Can I look up someone else's Medicare number?
No. Medicare will only give you your own number. If you are helping a family member, they will need to call or log in themselves, or authorize you in writing to act on their behalf. Some offices allow you to bring a power of attorney document, but call ahead to confirm what your local office requires.
Is my Medicare number the same as my Social Security number?
Your Medicare number includes your Social Security number as the first nine digits, but it is not the same thing. The two-letter suffix at the end is added by Medicare. Always use your full Medicare number when dealing with healthcare providers or Medicare itself.
What should I do if my Medicare card is damaged or lost?
You can order a replacement card by logging into Medicare.gov, calling 1-800-MEDICARE, or visiting a Social Security office. There is no charge for a replacement card. It typically arrives within two weeks, though you can use your Medicare number before the card arrives.
Do I need my Medicare number for every doctor visit?
Yes. Bring your Medicare card or write down your Medicare number before each appointment. Doctors' offices need it to bill Medicare and to keep your records organized. If you do not have your card, call ahead and give the office your number so they can look up your information.