Where to Find Your Medicare Number and What It Looks Like

Your Medicare number is on your Medicare card, in your online account, or available by phone from Medicare

Your Medicare number is a unique identifier that Medicare uses to track your coverage and claims. It appears on your physical Medicare card, which is the easiest place to find it. If you do not have your card handy, you can look it up online through your Medicare account or call Medicare directly.

Your Medicare number stays the same for life unless you request a change. It is different from your Social Security number, though Medicare originally used Social Security numbers as identifiers. If you enrolled in Medicare before 2015, your card may show your Social Security number; if you enrolled after 2015, your card shows a randomly assigned Medicare number instead.

Key Takeaways

Your Medicare card shows your Medicare number on the front, along with your name, sex, and the date your coverage began.
You can view your Medicare number by logging into your account at Medicare.gov using your username and password.
If you do not have online access, call 1-800-MEDICARE (1-800-633-4227) and speak to a representative who can provide your number.
Your Medicare number is required when you schedule doctor visits, fill prescriptions, or file claims with Medicare.

Finding your number on your Medicare card

The front of your Medicare card displays your Medicare number in the upper right corner. The number is 11 characters long and includes both letters and numbers. Below your Medicare number, you will see your name, your sex, and the date your Part A coverage began.

The back of your card lists your claims address and customer service phone number. Keep your card in a safe place and bring it to every doctor visit, hospital stay, or pharmacy visit. If your card is lost or damaged, you can request a replacement by calling 1-800-MEDICARE or by visiting Medicare.gov.

Accessing your number through Medicare.gov

You can view your Medicare number online by creating or logging into your account at Medicare.gov. Click "Sign In" at the top of the page and enter your username and password. If you do not have an account, you can create one using your email address and a password you choose.

Once you are signed in, your Medicare number appears on your account dashboard under "Your Medicare Information." This method works 24 hours a day, seven days a week, and you do not need to wait on hold. You can also read or print a copy of your information from this page if you need it for a doctor's office or insurance company.

Calling Medicare to get your number

If you prefer to speak with someone, call 1-800-MEDICARE (1-800-633-4227). Representatives are available Monday through Friday from 8 a.m. to 8 p.m. Eastern time. Have your name, date of birth, and home address ready when you call.

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 the TTY number 1-877-486-2048. Spanish-language support is also available by pressing the appropriate option when you call.

What to do if your card shows your Social Security number

If you enrolled in Medicare before April 2015, your card may display your Social Security number instead of a randomly assigned Medicare number. This is normal and does not mean anything is wrong with your coverage. Your Social Security number still works as your Medicare identifier for all claims and appointments.

Medicare began issuing new cards with random numbers in 2015 to protect privacy. You do not have to request a new card unless you want one, but you can request a replacement at any time by calling 1-800-MEDICARE. The new card will have a randomly assigned Medicare number, though your old Social Security number will still be linked to your account in Medicare's system.

Using your Medicare number for appointments and prescriptions

When you schedule a doctor's appointment, the office will ask for your Medicare number. Provide the number from your card or from your online account. The doctor's office uses this number to verify your coverage and to submit claims to Medicare after your visit.

When you fill a prescription at a pharmacy, give the pharmacist your Medicare number if you have Medicare Part D prescription coverage. The pharmacy uses this number to check your coverage and to process your claim with your Part D plan. If you do not have your card with you, you can usually provide your name and date of birth instead, though having your number speeds up the process.

Protecting your Medicare number

Your Medicare number is sensitive information, similar to your Social Security number. Do not share it with anyone except your doctor, hospital, pharmacy, or insurance company. Be cautious of unsolicited calls or emails asking for your Medicare number, as scammers sometimes pose as Medicare representatives.

Medicare will never call you asking for your number or personal information unless you initiated the contact. If you receive a suspicious call claiming to be from Medicare, hang up and call 1-800-MEDICARE yourself to report it. You can also report fraud to the Office of Inspector General at 1-800-HHS-TIPS (1-800-447-8477).

Frequently Asked Questions

Can I use my Social Security number instead of my Medicare number?

If your card shows your Social Security number, yes — it still works as your Medicare identifier. However, if you have a newer card with a random Medicare number, you should use that number instead. Either way, Medicare's system recognizes both identifiers linked to your account.

What if I lost my Medicare card?

Call 1-800-MEDICARE to request a replacement card. You can also request one online through your Medicare.gov account. A new card usually arrives within 7 to 10 business days. In the meantime, you can provide your Medicare number verbally to doctors and pharmacies if you remember it, or you can look it up online.

Is my Medicare number the same as my member ID?

Your Medicare number and your member ID are different. Your Medicare number is assigned by Medicare and appears on your red, white, and blue Medicare card. Your member ID is assigned by your specific Medicare Advantage or Part D plan and appears on that plan's card. You need both numbers for complete coverage information.

Can I change my Medicare number?

You cannot change your Medicare number under normal circumstances. However, if you believe your number has been compromised or used fraudulently, contact Medicare at 1-800-MEDICARE to report it and discuss your options. In rare cases, Medicare may issue a new number, though this is uncommon.

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.