You get a Medicare card automatically when you turn 65, or you can request one if you already have Medicare

If you are turning 65 and enrolled in Medicare, Social Security will mail your card to you automatically about two weeks before your birthday. You do not need to do anything — the card arrives on its own. If you are already on Medicare and need a replacement card (yours is lost, damaged, or you want to update your name), you can request a new one through Medicare directly.

Your Medicare card shows your Medicare number, which you will need for doctor visits, prescriptions, and hospital stays. The card itself is not required to receive care — providers can look up your information by your Social Security number — but having the card makes check-in faster and reduces errors.

Key Takeaways

  • Social Security mails your Medicare card automatically about two weeks before you turn 65, as long as you enrolled in Medicare on time.
  • You can request a replacement card online through Medicare.gov, by phone at 1-800-MEDICARE, or by mail if you do not have internet access.
  • Your Medicare number stays the same for life, but Social Security changed the format in 2020 to use a random number instead of your Social Security number.
  • If your card does not arrive within three weeks of your 65th birthday, contact Social Security or Medicare to check whether enrollment went through.

Getting your first card when you turn 65

Social Security handles the mailing of your first Medicare card. About two weeks before your 65th birthday, Social Security will send the card to the address they have on file. The card arrives in a plain white envelope with no markings that identify it as Medicare information.

For this to happen, you must have enrolled in Medicare during your initial enrollment period. Your initial enrollment period runs for seven months: three months before the month you turn 65, the month you turn 65, and three months after. If you enrolled during this window, the card will arrive automatically. If you missed this period and enrolled later, Social Security will still mail your card, but it may take longer — sometimes four to six weeks after your enrollment is processed.

If you do not receive your card within three weeks of your birthday, call Social Security at 1-800-772-1213 (TTY 1-800-325-0778) to confirm that your enrollment went through and that they have your correct mailing address.

Requesting a replacement card online

If you need a new card because yours is lost, stolen, or damaged, the fastest way is through Medicare.gov. Go to the Medicare website, sign in to your account (you will need to create one if you do not have it), and look for the option to order a replacement card. The process takes about five minutes and your new card will arrive in seven to ten business days.

You can also request a replacement card by phone. Call 1-800-MEDICARE (1-800-633-4227) and tell the representative that you need a replacement card. They will verify your identity by asking for your name, date of birth, and Social Security number, then mail the card to you. Phone lines are open Monday through Friday, 8 a.m. to 8 p.m. Eastern time, and Saturday 9 a.m. to 1 p.m. Eastern time.

Requesting a card by mail if you do not have internet access

If you cannot use the online form or prefer to explore by mail, you can request a replacement card through the Social Security Administration. Fill out Form SSA-131 (process for a Social Security Card) and mail it to your local Social Security office. You can find the address on the Social Security website or by calling 1-800-772-1213.

When you mail the form, include a copy of a document that proves your identity — a driver's license, passport, or state ID card works. The form and instructions are available on the Social Security website. Processing by mail takes longer than online or phone requests, usually three to four weeks.

Understanding your Medicare number

Your Medicare number is a unique identifier that stays with you for life. Before 2020, Medicare numbers were based on your Social Security number, which meant your Medicare number revealed your Social Security number to anyone who saw your card. Social Security changed this in 2020 to protect privacy.

If you turned 65 before 2020, your old Medicare number may still appear in some provider records, but your new card shows a random number instead. Both numbers are valid — providers can look up your information using either one. If you are confused about which number to use, ask your doctor's office; they will have your correct Medicare number in their system.

What to do if your address changes

If you move after you receive your Medicare card, update your address with Social Security so that any future mail reaches you. You can update your address online through your Social Security account, by phone at 1-800-772-1213, or in person at your local Social Security office.

You do not need a new Medicare card when you move — your current card remains valid. However, updating your address ensures that Medicare can reach you about coverage changes, premium notices, or other important information. If you move and do not update your address, you may miss notices about important date that affect your coverage.

If your name changes

If you change your name after you receive your Medicare card — through marriage, divorce, or legal name change — you can request a new card with your updated name. Call 1-800-MEDICARE or go to Medicare.gov and request a replacement card. You will need to provide proof of your name change, such as a marriage certificate, divorce decree, or court order.

Update your name with Social Security at the same time. This ensures that your Medicare records, Social Security records, and provider records all match, which prevents billing and coverage problems. You can update your name with Social Security by phone, online, or in person at a local office.

Frequently Asked Questions

What if I enrolled in Medicare late — will I still get a card?

Yes. Social Security will mail your card after your enrollment is processed, though it may take longer than the standard two weeks. Late enrollment can add a surcharge to your Part B premium, but you will still receive a card. If you enrolled more than three months after your 65th birthday, allow four to six weeks for the card to arrive.

Can I use my old Medicare card if I have a new one?

No. Once you receive a new card, your old card is no longer valid. Destroy the old card by cutting it up so that no one else can use the number. If you have both an old number (based on your Social Security number) and a new number (random), providers may have either one in their system, but your new card is the current official one.

Do I need my Medicare card to see a doctor?

You do not need the physical card to receive care. Doctors can look up your Medicare information using your name and Social Security number. However, bringing your card to appointments makes check-in faster and reduces the chance of billing errors. If you do not have your card yet, tell the office you are on Medicare and provide your Medicare number if you know it.

What if my card arrives with the wrong information on it?

Call 1-800-MEDICARE right away. The representative will verify the information and correct any errors in your Medicare record. Common errors include misspelled names or wrong dates of birth. Fixing these now prevents problems when you file claims or refill prescriptions.

How long does a Medicare card last?

Your Medicare card does not expire. You keep the same card for life unless you need a replacement because it is lost, damaged, or your name changes. Your Medicare number also stays the same throughout your life, so you will use the same number for all your Medicare claims and coverage.