The Basic Age Rule for Medicare

You become may be able to access for Medicare when you turn 65, regardless of your work history or income. This is the primary rule, and it applies to almost everyone. You do not have to be retired to sign up — you can still be working — but you must be a U.S. citizen or permanent resident who has lived in the country for at least five years.

If you were born on the first of the month, Medicare coverage begins the month before your 65th birthday. If you were born on any other day, coverage begins the month you turn 65. You can sign up starting three months before the month you turn 65, and you have until three months after that month ends. If you miss this window, you may pay a penalty for the rest of your life, so marking your calendar matters.

Key Takeaways

  • You are may be able to access for Medicare at 65 if you are a U.S. citizen or permanent resident who has lived here for at least five years.
  • You can sign up three months before you turn 65 through three months after the month you turn 65, with no penalty if you enroll during this window.
  • Some people under 65 may have access to for Medicare if they receive Social Security Disability Insurance (SSDI) for at least 24 months or have end-stage renal disease or ALS.
  • If you delay signing up past your initial window, you will pay a permanent monthly surcharge on your Part B and Part D premiums.
  • You should contact Social Security or visit Medicare.gov to start the sign-up process at least three months before you turn 65.

may have access to for Medicare Before Age 65

You can become may be able to access for Medicare before 65 in three specific situations. The first is if you have been receiving Social Security Disability Insurance (SSDI) for at least 24 months. The 24 months do not have to be consecutive — they are counted from the date your disability began, even if you had breaks in receiving payments. Once you have been on SSDI for 24 months, Medicare begins automatically; you do not need to explore again.

The second way is if you have end-stage renal disease (ESRD) — permanent kidney failure requiring dialysis or a transplant. You become may be able to access for Medicare when ready when your kidney disease is diagnosed, even if you are not yet on dialysis. You will need to provide medical documentation from your nephrologist (kidney doctor) when you sign up.

The third way is if you have been diagnosed with amyotrophic lateral sclerosis (ALS), also called Lou Gehrig's disease. Unlike ESRD and SSDI, you do not have to wait — Medicare coverage begins in the month you are diagnosed. You will need a letter from your doctor confirming the diagnosis.

How Work History Affects Your may be able to access

You do not need a specific number of work years to may have access to for Medicare at 65. However, your work history does determine whether you or your spouse can claim benefits based on someone else's record. If you have worked and paid Medicare taxes for at least 10 years (40 quarters), you may have access to on your own record. If you have not worked that long, you may still be able to sign up based on your spouse's work history, your ex-spouse's history (if you were married at least 10 years), or your parent's history (if you are 62 or older).

Even if you have never worked or paid Medicare taxes, you can still enroll in Medicare at 65. You will pay higher premiums for Part B (medical insurance) and Part D (prescription drug coverage) because you do not have the required work credits, but you will not be denied coverage. This is different from Social Security retirement benefits, which require work history to receive payments.

What Happens If You Miss Your Sign-Up Window

If you do not sign up during the seven-month window around your 65th birthday, you will face a permanent penalty. For Part B, the penalty is 10 percent of the standard premium for each full year you delayed, added to your monthly bill for life. For Part D (prescription drug coverage), the penalty is 1 percent of the national average premium for each month you were without coverage, also added for life. These penalties do not go away if you sign up later.

There are limited exceptions. If you were covered by a group health plan through your own job or your spouse's job when you turned 65, you have an eight-month grace period after that coverage ends to sign up without penalty. You will need to provide proof of that coverage — usually a letter from your employer or health plan — when you enroll. If you were living outside the United States, you also have a grace period, but you must show proof of residency abroad.

Signing Up for Medicare at 65

You should contact Social Security at least three months before you turn 65. You can call 1-800-772-1213, visit your local Social Security office, or go to ssa.gov to start the process. You will need your birth certificate, proof of citizenship or permanent residency, and your current contact information. If you are signing up based on someone else's work record, you will also need their Social Security number.

You can also sign up directly through Medicare at Medicare.gov or by calling 1-800-MEDICARE (1-800-633-4227). Both routes lead to the same enrollment system. Social Security handles the paperwork, but Medicare processes the coverage. You do not have to choose your specific plan (Part B, Part D, or supplemental insurance) at this stage — you can do that during the general enrollment period or during the annual open enrollment period in the fall.

When to Ask Your Doctor About Medicare

If you are approaching 65 and have chronic conditions or take multiple medications, talk to your doctor about which Medicare plan might work best for you. Your doctor can tell you which hospitals and specialists are in different plans' networks, and whether your current medications are covered under different Part D plans. This conversation is most useful about four months before you turn 65, when you still have time to research options.

If you are under 65 and think you might may have access to through SSDI, ESRD, or ALS, contact Social Security or your local Medicare office to confirm your may be able to access. Do not assume you are automatically enrolled — you still need to sign up, even though the coverage date may be earlier than 65. Waiting to contact them can delay your coverage start date.

Frequently Asked Questions

What if I am still working at 65 — do I have to sign up for Medicare?

You do not have to sign up if you are covered by a group health plan through your current job and your employer has 20 or more employees. You can delay without penalty as long as you are actively employed. Once you leave that job, you have eight months to sign up. If your employer has fewer than 20 employees, you should sign up at 65 even if you are working, because Medicare becomes your primary insurance.

Can my spouse sign up for Medicare based on my work record?

Yes, if you have worked and paid Medicare taxes for at least 10 years. Your spouse can sign up at 65 based on your record, even if they never worked. They will need to provide proof of marriage and your Social Security number when they enroll. This does not affect your own Medicare benefits.

What if I was born outside the United States?

You can still may have access to for Medicare at 65 if you are a U.S. citizen or have been a permanent resident for at least five years. You will need to provide proof of citizenship or a green card when you sign up. If you are a permanent resident, you must have lived in the U.S. continuously for those five years — extended trips abroad can interrupt the requirement.

Do I lose Medicare if I move to another country?

You can keep Medicare if you move abroad, but coverage is limited. Medicare generally does not pay for care outside the U.S., except in rare cases near the border or on ships in U.S. waters. If you plan to live abroad, talk to Medicare before you move to understand what coverage you will have.

What if I turned 65 years ago and never signed up?

You can still enroll, but you will owe back premiums and penalties. Contact Social Security or Medicare when ready to find out how much you owe and to start coverage. The longer you wait, the larger the penalty grows, so enrolling now is better than waiting further.