You get a new Medicare card only when something changes — not every year
Medicare does not automatically send you a new card each year. You keep the same card for as long as your information stays the same. The Social Security Administration and Centers for Medicare & Medicaid Services (CMS) only mail a replacement card when your name changes, your Medicare number changes, or you switch from one type of coverage to another — for example, from Original Medicare to a Medicare Advantage plan.
If your card arrives damaged, lost, or stolen, you can request a replacement at any time. The card itself has no expiration date printed on it, so there is no important date to replace it straightforward because time has passed.
Key Takeaways
- Medicare cards do not expire and are not replaced annually — you keep the same card unless your coverage or personal information changes.
- A new card is mailed when you change your name, when your Medicare number changes, or when you switch between Original Medicare and a Medicare Advantage or Medigap plan.
- If your card is lost, stolen, or damaged, you can request a replacement by calling 1-800-MEDICARE or visiting Medicare.gov.
- Your Medicare number is now your Social Security number, and CMS stopped mailing new cards to all beneficiaries in 2019 — older cards with different numbers are still valid.
When CMS will mail you a replacement card
CMS mails a new card in four main situations. First, if you legally change your name — through marriage, divorce, or court order — you must notify Social Security, and CMS will send a card with your new name. Second, if your Medicare number itself changes (which is rare but can happen if there was an error in your original enrollment), you will receive a new card with the updated number.
Third, if you switch from Original Medicare to a Medicare Advantage plan, or from Medicare Advantage back to Original Medicare, your card may change to reflect your new plan. Fourth, if you move to a different state, your card may be reissued depending on your plan type and whether your coverage changes as a result of the move.
In all other cases — annual plan reviews, premium changes, deductible adjustments, or routine updates to your coverage — you do not receive a new card. Your existing card remains valid.
How to replace a lost, stolen, or damaged card
If your card is damaged, lost, or stolen, you do not have to wait for an automatic mailing. You can request a replacement when ready by calling 1-800-MEDICARE (1-800-633-4227). The phone line is open 24 hours a day, seven days a week. Have your Social Security number ready when you call.
You can also request a replacement online at Medicare.gov by logging into your account or creating one if you do not have one yet. A replacement card typically arrives within 7 to 10 business days. If your card was stolen, consider reporting the theft to your local police department and keeping a copy of the report for your records.
Understanding the Medicare number on your card
Your Medicare number is now your Social Security number plus a two-letter suffix. This change began in 2018, and CMS mailed new cards to all beneficiaries by December 2019. If you have an older card with a different number format (a nine-digit number without letters), that card is still valid and does not need to be replaced straightforward because it looks different.
The old number format is no longer used for new enrollments or replacements, but the cards themselves do not expire. You can use an older card for as long as it remains readable. However, when you do receive a replacement card for any of the reasons listed above, it will show your Social Security number with the two-letter suffix.
What to do if you never received your original card
If you became may be able to access for Medicare but never received your initial card in the mail, contact CMS directly at 1-800-MEDICARE. Have your Social Security number and date of birth ready. CMS can confirm whether a card was mailed to your address on file and can issue a replacement if needed.
If you recently moved, the card may have been sent to an old address. Update your address with Social Security at ssa.gov or by visiting a local Social Security office. Once your address is corrected, you can request that a new card be mailed to your current location.
How to update your information without waiting for a new card
Changes to your coverage details — such as switching plans, updating your address, or changing your contact information — do not always require a new card to take effect. Many changes can be made through your Medicare account online or by calling 1-800-MEDICARE, and they become active in your records when ready even if a new card has not yet arrived.
If you change your address, update it with Social Security first, then notify your Medicare Advantage plan or Medigap insurer directly. Your coverage will reflect the change even before a replacement card is mailed. The same applies to plan changes during the annual enrollment period — your new plan takes effect on January 1, and you will receive a new card from your new plan if required, but your coverage is active regardless.
Frequently Asked Questions
Do I need a new card every time my plan changes during open enrollment?
Not always. If you switch between Original Medicare and a Medicare Advantage plan, you may receive a new card from your new plan. If you stay within Original Medicare and only change your Medigap or prescription drug plan, you typically do not receive a new Medicare card — your existing card remains valid. Your new plan will send you a separate plan card.
What if my card is still readable but looks worn?
A worn but readable card is still valid. You do not need to replace it unless it is damaged to the point that your name, number, or coverage information cannot be read. If you are concerned about readability, you can request a replacement at any time by calling 1-800-MEDICARE.
Can I use my old card with the old number format at the doctor's office?
Yes. Old cards with the original nine-digit number format are still valid and accepted by providers. You do not need to replace it straightforward because the number format is different. Providers' systems recognize both the old and new number formats.
How long does it take to receive a replacement card?
A replacement card typically arrives within 7 to 10 business days after you request it. If you need proof of coverage before the card arrives, you can print a temporary proof of coverage from your Medicare account online or ask 1-800-MEDICARE to mail you a temporary document.
What should I do if I receive a card I did not request?
If you receive an unexpected card, check the name and number to confirm it is yours. If the information is correct, it may be a replacement issued due to a change in your coverage or a routine update. If the information is incorrect or you believe it was sent in error, call 1-800-MEDICARE to clarify. Do not discard the card until you confirm the situation.