What Your Medicare Card Looks Like and What the Numbers Mean

The front of your Medicare card

Your Medicare card is a plastic card about the size of a credit card. The front shows your name, a nine-digit Medicare number, and the dates your coverage began. The card is mostly white with a blue stripe across the top that says "MEDICARE" in large letters. Your name appears in the upper left corner, and your Medicare number is printed below it.

The Medicare number is the key piece of information on the card. You will need it every time you see a doctor, fill a prescription, or pay a medical bill. The number stays the same for your entire life — it does not change if you move, change doctors, or switch Medicare plans.

On the right side of the front, you will see two dates: one labeled "Effective Date" (when your coverage started) and one labeled "Claim Number" or similar. These dates help your doctor's office and pharmacies know when to bill Medicare.

Key Takeaways

Your Medicare card is a white plastic card with a blue stripe and your name, Medicare number, and coverage dates printed on the front.
The nine-digit Medicare number is the most important piece of information and is used for all medical claims and prescriptions.
The back of the card lists customer service phone numbers and explains which parts of Medicare you have (Part A, Part B, Part D, or other coverage).
You should keep your card in a safe place and bring it to every doctor visit, hospital stay, and pharmacy visit.
If your card is lost, stolen, or damaged, you can order a replacement through Medicare or your insurance company.

The back of your Medicare card

The back of the card is where you find the phone numbers you need. At the top is the main Medicare customer service number: 1-800-MEDICARE (1-800-633-4227). This number is available 24 hours a day, seven days a week. Below that are spaces for your insurance company's customer service number and your prescription drug plan number, if you have one.

The back also lists which parts of Medicare you have. You will see checkmarks or "Yes" next to the coverage types you enrolled in. Most people have Part A (hospital insurance) and Part B (medical insurance). If you have Part D (prescription drug coverage) or a supplemental plan, those will be listed here too.

What the Medicare number means

The nine-digit Medicare number is made up of parts that identify you. The first five digits are usually based on your Social Security number, though this changed for people who turned 65 after 2014. The next two digits are claim numbers that Medicare assigns. The last digit is a check digit that helps catch errors.

You do not need to memorize what each digit means, but you do need to know your full number. Write it down or take a photo of your card and keep it somewhere safe. When you call a doctor's office to make an appointment, they will ask for your Medicare number. When you fill a prescription, the pharmacy will scan or type in your number. When you receive a medical bill, your Medicare number will be on it.

Different types of Medicare cards

If you have Original Medicare (Part A and Part B run directly by the federal government), your card will show that. If you have a Medicare Advantage plan instead, your card may look slightly different — it will have your plan's name and logo on it, and you may have a different customer service number on the back. The Medicare number itself stays the same either way.

If you have both Original Medicare and a supplemental insurance plan (sometimes called Medigap), you will have two cards: your Medicare card and a separate card from your supplemental insurance company. Bring both cards to doctor visits so the office can bill them in the right order.

Keeping your card safe

Your Medicare card should be treated like a credit card. Do not carry it in your wallet if you do not need it that day, because your Medicare number can be used to commit fraud. Keep it in a safe place at home, and bring it only when you have a doctor's appointment, hospital visit, or pharmacy visit.

Do not share your Medicare number with anyone who calls you unexpectedly. Medicare will never call you asking for your number unless you called them first. If someone calls claiming to be from Medicare and asking for your number, hang up and call 1-800-MEDICARE yourself to report it.

What to do if your card is lost or damaged

If your card is lost, stolen, or too worn to read, you can order a replacement. Call 1-800-MEDICARE and tell them your card needs to be replaced. You can also go online to Medicare.gov and order a new card through your account. A replacement card usually arrives in 7 to 10 business days.

Until your new card arrives, you can still see doctors and fill prescriptions. Give the office or pharmacy your Medicare number by memory or from a written note. They can look up your coverage using just your number — they do not need the physical card.

Changes to your card information

If your name changes (through marriage, divorce, or legal name change), you need to tell Medicare. Call 1-800-MEDICARE or visit your local Social Security office. Your Medicare number will stay the same, but your card will be reissued with your new name.

If your coverage changes — for example, if you switch from Original Medicare to a Medicare Advantage plan — you will get a new card that reflects the change. The new card will show your new plan's name and customer service number on the back, but your Medicare number stays the same.

Frequently Asked Questions

Can I use my Medicare card online or by phone without the physical card?

Yes. Doctors' offices, hospitals, and pharmacies can look up your coverage using just your Medicare number. You do not need the physical card in front of you to schedule an appointment or fill a prescription, though it is helpful to have the number written down or memorized.

What if my name on the card does not match my ID?

Tell your doctor's office or hospital about the mismatch when you arrive. They may ask for an ID to verify your identity. If your name has legally changed, contact Medicare to update your records and request a new card with the correct name.

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

For people who turned 65 before 2015, the first five digits of the Medicare number were based on Social Security number. For people who turned 65 after 2014, Medicare assigned a random number instead. Either way, your Medicare number and Social Security number are different nine-digit numbers.

What should I do if I see charges on my Medicare bill that I do not recognize?

Call 1-800-MEDICARE right away. Medicare can investigate whether the charges are correct. You can also review your Medicare Summary Notice (the bill you receive) carefully and report any services you did not receive or do not recognize.

Do I need to carry my Medicare card if I have a Medicare Advantage plan?

Yes. Even with a Medicare Advantage plan, you should bring your Medicare card to appointments. Some doctors and hospitals need to see it to verify your coverage, and it shows your Medicare number, which is used for all billing.

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.