Where to Find Your Medicare ID Number and What It Looks Like

Your Medicare ID number is on your Medicare card, in your online account, or by calling Medicare directly

Your Medicare ID number is a unique identifier that Medicare uses to track your coverage and claims. You will need it every time you see a doctor, fill a prescription, or check on your benefits. If you have your physical Medicare card, the number is printed on the front. If you do not have the card in front of you, you can find the number through your online Medicare account, by calling Medicare, or by checking documents Medicare has sent you in the mail.

The number itself is 10 digits long and may be followed by a letter. It is not the same as your Social Security number, though Medicare originally used Social Security numbers as Medicare IDs. If you turned 65 before 2015, your Medicare ID might still be your Social Security number plus a letter. If you turned 65 in 2015 or later, Medicare assigned you a new random number instead.

Key Takeaways

Your Medicare ID is printed on the front of your Medicare card in the upper right corner, and it is 10 digits followed by a letter.
You can view your Medicare ID by logging into your account at Medicare.gov using your email address and password.
Calling 1-800-MEDICARE (1-800-633-4227) will connect you to a representative who can read your Medicare ID to you over the phone.
If you have lost your card and cannot access your online account, Medicare can mail you a replacement card within 7 to 10 business days.
Your Medicare ID stays the same for life unless you make changes to your coverage type, so you only need to find it once.

Finding your number on your Medicare card

The easiest way to find your Medicare ID is to look at your physical Medicare card. The number appears in the upper right corner of the front of the card, printed in large type. It is 10 digits followed by a single letter. Below the number, you will see your name and the date your coverage began.

If you have received more than one Medicare card over the years, use the most recent one. Older cards may show an outdated number or coverage type. If your card is damaged, faded, or you cannot read the number clearly, request a replacement by calling 1-800-MEDICARE or by logging into your Medicare account online.

Accessing your number through Medicare.gov

You can view your Medicare ID number by logging into your personal account at Medicare.gov. Go to the website and select "Log In" in the upper right corner. You will need an email address and password. If you do not have an account yet, you can create one by selecting "Create Account" and following the steps.

Once you are logged in, select "My Health Information" or "My Medicare" from the menu. Your Medicare ID number will appear on the main page or under a section labeled "Medicare Coverage" or "My Coverage." You can also read or print a copy of your information from this page to keep for your records.

If you forget your password, select "Forgot Password" on the login page and follow the steps to reset it. Medicare will send a link to your email address. If you no longer have access to the email address you used to create your account, call 1-800-MEDICARE and a representative can help you regain access.

Calling Medicare to get your number

You can call Medicare directly at 1-800-MEDICARE (1-800-633-4227) and speak to a representative who will read your Medicare ID number to you. This line is open 24 hours a day, 7 days a week. Have your name, date of birth, and address ready when you call, as the representative will ask for this information to look up your account.

If you are deaf or hard of hearing, you can use the TTY number 1-877-486-2048. If you speak a language other than English, Medicare can connect you to an interpreter at no cost. Tell the representative which language you speak when you call.

Checking documents Medicare sent you

Your Medicare ID number also appears on official documents that Medicare sends you by mail. Look for your Medicare Summary Notice, which Medicare sends once a year to show what claims were processed and what Medicare paid. The number is listed at the top of this notice. You may also find it on your Explanation of Benefits (EOB) from your doctor or hospital, though this document comes from your provider, not directly from Medicare.

If you have received a letter from Medicare about your coverage, your enrollment, or your benefits, your Medicare ID will be printed on that letter as well. Keep these documents in a safe place so you have your number available when you need it.

What to do if you cannot find your number

If you have looked everywhere and still cannot locate your Medicare ID, the fastest solution is to call 1-800-MEDICARE. A representative can confirm your identity and provide your number when ready over the phone. You can also request a replacement Medicare card, which will arrive by mail within 7 to 10 business days.

If you are having trouble accessing your online account or do not remember your email address, call Medicare and ask for help. Do not give your Social Security number or other personal information to anyone who calls you claiming to be from Medicare — Medicare will never call you first to ask for this information. If someone calls you, hang up and call 1-800-MEDICARE yourself to verify the call was real.

Understanding your Medicare ID format

Your Medicare ID is always 10 digits followed by a letter. The letter at the end indicates your relationship to the person who originally enrolled in Medicare. For example, the letter "A" usually means you are the person who enrolled, "B" means you are the spouse, and "D" means you are a widow or widower. This letter does not affect your coverage — it is just how Medicare tracks family relationships internally.

If you have Original Medicare (Parts A and B), your Medicare ID is the same whether you use it at the doctor's office, the hospital, or the pharmacy. If you have a Medicare Advantage plan or a prescription drug plan, your plan may issue you a separate card with a different number for that specific plan. Keep both cards with you when you go to medical appointments.

Frequently Asked Questions

Is my Medicare ID number the same as my Social Security number?

Not necessarily. If you turned 65 before 2015, your Medicare ID is likely your Social Security number followed by a letter. If you turned 65 in 2015 or later, Medicare gave you a new random 10-digit number instead of using your Social Security number. You can check your Medicare card to see which format you have.

What if I have both Original Medicare and a Medicare Advantage plan?

You will have two different ID numbers — one for Original Medicare (Parts A and B) and one for your Medicare Advantage plan. Bring both cards to your doctor's office. The office staff will know which one to use based on the type of care you are receiving.

Can I change my Medicare ID number?

No, your Medicare ID number stays the same for life. It only changes if you make major changes to your coverage, such as switching from Original Medicare to a Medicare Advantage plan, and even then Medicare will assign you a new number rather than letting you choose one.

Do I need to memorize my Medicare ID number?

You do not need to memorize it, but it is helpful to write it down and keep it in your wallet or phone. When you call your doctor's office to schedule an appointment or call your pharmacy to refill a prescription, having the number handy will speed up the process.

What should I do if my Medicare card is lost or stolen?

Call 1-800-MEDICARE and request a replacement card. Medicare will mail you a new card within 7 to 10 business days at no cost. In the meantime, you can still see your Medicare ID by logging into your account at Medicare.gov or by calling Medicare and asking a representative to read it to you.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.