You should request your Medicare card three months before you turn 65, or as soon as you become may be able to access if you may have access to before that age

Medicare enrollment happens on a schedule, and your card arrives by mail after you've enrolled. If you wait until after your 65th birthday to start the process, you may face late penalties on your premiums and a gap in coverage. The safest approach is to begin three months ahead — that gives you time to enroll, receive your card, and start coverage on your 65th birthday without interruption.

If you're already receiving Social Security benefits, Medicare will enroll you automatically three months before you turn 65. You'll receive your card in the mail without having to do anything. If you're not yet taking Social Security, you'll need to enroll yourself through Medicare.gov, by phone, or in person at your local Social Security office.

Key Takeaways

  • Start the enrollment process three months before your 65th birthday to avoid coverage gaps and late-enrollment penalties.
  • If you already receive Social Security, Medicare will enroll you automatically and mail your card without action on your part.
  • If you don't receive Social Security, you must enroll yourself through Medicare.gov, by calling 1-800-MEDICARE, or at your local Social Security office.
  • Your Medicare card arrives by mail within two to four weeks after enrollment, though coverage can begin on your 65th birthday even if the card hasn't arrived yet.
  • Some people may have access to for Medicare before 65 due to disability or end-stage renal disease; the three-month rule applies to them as well.

How the automatic enrollment process works if you receive Social Security

Social Security and Medicare share records, so if you're already collecting benefits, the system knows your birthday. About three months before you turn 65, Social Security will enroll you in Medicare Part A (hospital insurance) and Part B (medical insurance) automatically. You don't need to fill out forms or make phone calls.

Your Medicare card will arrive in the mail roughly two to four weeks after enrollment. The card shows your name, Medicare number, and the dates your coverage begins. Even if the card hasn't arrived by your 65th birthday, your coverage starts on that date — you can use your Social Security number as proof of enrollment if you need medical care before the card shows up.

How to enroll yourself if you don't receive Social Security

If you're not taking Social Security benefits, you need to enroll in Medicare yourself. You have three ways to do this: online at Medicare.gov, by phone at 1-800-MEDICARE (1-800-633-4227), or in person at your local Social Security office.

The online route through Medicare.gov is often the fastest. You'll need your Social Security number, proof of citizenship or legal residency, and information about any current health coverage. The phone line is available seven days a week, and a representative can walk you through the process. If you prefer face-to-face help, Social Security offices are open weekdays, though wait times vary by location.

After you enroll, your card will arrive by mail within two to four weeks. Your coverage begins on the first day of the month you turn 65, or the first day of the month you become may be able to access if that's earlier.

What happens if you miss the three-month window

If you don't enroll during the three months before your 65th birthday, you can still enroll during the General Enrollment Period, which runs January 1 through March 31 each year. However, your coverage won't start until July 1 of that year — meaning you'll have months without Medicare. You'll also pay a higher Part B premium for as long as you have Medicare, as a penalty for late enrollment.

The penalty is 10 percent of the standard Part B premium for each full 12 months you delayed enrollment. If you delay for two years, you pay 20 percent more. That extra cost stays with you permanently, so enrolling on time saves money over your lifetime.

There are narrow exceptions to the late-enrollment penalty — for instance, if you had employer coverage and delayed Medicare because of it, or if you were out of the country. These situations require documentation, so contact Medicare directly to discuss your circumstances.

Special situations: Disability and end-stage renal disease

You may become may be able to access for Medicare before 65 if you've been receiving Social Security Disability Insurance (SSDI) for 24 months, or if you have end-stage renal disease (ESRD) or ALS. The same three-month enrollment window applies to you.

If you receive SSDI, Social Security will enroll you automatically in Medicare 24 months after your disability benefits began. If you have ESRD or ALS, you'll need to enroll yourself or work with your healthcare provider, as these conditions don't trigger automatic enrollment. Your local Social Security office or Medicare can help you understand your timeline and options.

What to do while you wait for your card to arrive

Your coverage begins on your 65th birthday (or your may be able to access date) even if your physical card hasn't arrived yet. If you need medical care before the card shows up, you can use your Social Security number as proof of enrollment. Give your doctor's office or hospital your Social Security number and let them know you've enrolled in Medicare — they can verify your coverage through their systems.

Keep any enrollment confirmation documents you receive by mail or email. These show your Medicare number and coverage dates and can serve as proof while you wait for the official card. If more than four weeks pass and your card hasn't arrived, contact Medicare at 1-800-MEDICARE to request a replacement.

Frequently Asked Questions

What if I'm still working at 65 — do I still need to enroll in Medicare?

Yes, you should still enroll in Medicare even if you're working and have employer coverage. If you delay, you'll face late-enrollment penalties when you eventually leave your job. The exception is if your employer has 20 or more employees — in that case, you may be able to delay Part B enrollment without penalty, but you should still enroll in Part A.

Can I get my Medicare card before I turn 65?

No, your card will not be issued until after you enroll, which happens in the three months before your 65th birthday. You can enroll earlier if you become may be able to access due to disability or ESRD, and your card will arrive after that enrollment is processed.

What if I'm turning 65 but haven't received my Social Security yet?

You can still enroll in Medicare even if you haven't started Social Security benefits. Contact Medicare directly through Medicare.gov, by phone at 1-800-MEDICARE, or at your local Social Security office. You'll need to provide proof of age and citizenship.

Do I need to do anything with my Medicare card once it arrives?

Keep your card in a safe place and bring it to all medical appointments. You don't need to set up it or register it — it's ready to use as soon as it arrives. If your card is lost or damaged, you can request a replacement through Medicare.gov or by calling 1-800-MEDICARE.

What if I'm not a U.S. citizen — can I still get Medicare?

You can enroll in Medicare if you're a lawful permanent resident (green card holder) who has lived in the United States for at least five years, or if you're a citizen. You'll need to provide proof of legal residency when you enroll. Contact Medicare to discuss your specific situation.