You can sign up for Medicare at 65, but some people may have access to earlier

The standard age to start Medicare is 65. You become may be able to access on the first day of the month you turn 65, or the month after, depending on your birthday. However, you do not have to wait until 65 if you have been receiving Social Security Disability Insurance (SSDI) for 24 months, or if you have end-stage renal disease (ESRD) or amyotrophic lateral sclerosis (ALS). In those cases, Medicare can start earlier.

The month you turn 65 is called your Initial Enrollment Period. This is a seven-month window: it starts three months before the month you turn 65 and ends three months after. If you miss this window, you may face a permanent penalty on your premiums — so the timing matters, even if you do not plan to use Medicare right away.

Key Takeaways

  • You become may be able to access for Medicare the month you turn 65, and you have a seven-month enrollment window centered on that birthday to sign up without penalty.
  • If you have been on Social Security Disability for 24 months, you may have access to for Medicare before age 65, regardless of your actual age.
  • People with end-stage renal disease or ALS can start Medicare at any age, with different enrollment rules depending on whether they are working.
  • Signing up late can add a permanent 10 percent surcharge to your Part B premium for each year you delayed, so even if you delay coverage, you should still enroll on time.

How the 65-year-old enrollment window works

Your Initial Enrollment Period runs for seven months total. It begins three months before the month you turn 65 and ends three months after. For example, if you turn 65 in June, your window opens in March and closes in September.

You can sign up during any of those seven months, and your coverage will start on the first day of your birth month, the first day of the following month, or the first day of the month after that — depending on when you sign up. If you sign up in March (three months early), coverage starts in June. If you sign up in June itself, coverage starts in July. If you sign up in September (three months late), coverage starts in October.

The reason the timing matters is that if you miss this seven-month window, you enter what is called General Enrollment Period, which runs from January 1 to March 31 each year. During General Enrollment, you can still sign up, but you will pay a penalty — a permanent 10 percent increase to your Part B premium for each full year you were may be able to access but did not enroll.

may have access to for Medicare before 65 through disability

If you have been receiving Social Security Disability Insurance for 24 consecutive months, you become may be able to access for Medicare regardless of your age. This means a 45-year-old or a 55-year-old on SSDI can enroll in Medicare once they have been receiving disability payments for two years.

Your enrollment window is the same seven-month structure, but it is centered on the 24th month of your disability payments, not your birthday. Social Security will notify you when you become may be able to access, usually a few months before your coverage can start. You do not need to do anything to trigger this — it happens automatically — but you still need to actively enroll if you want coverage to begin.

If you are still working while on SSDI and earning above the Substantial Gainful Activity (SGA) limit, you may want to delay Medicare enrollment. Talk to Social Security about how work affects your benefits before you sign up.

may have access to for Medicare at any age with ESRD or ALS

People diagnosed with end-stage renal disease (permanent kidney failure requiring dialysis or transplant) or amyotrophic lateral sclerosis (ALS, also called Lou Gehrig's disease) can enroll in Medicare at any age. There is no waiting period and no age requirement.

For ESRD, your enrollment window depends on your situation. If you are not yet on dialysis or have not had a transplant, your window opens three months before the month dialysis or transplant is expected and closes 14 months after that month begins. If you are already on dialysis when you learn about Medicare, your window is three months before through 14 months after the month you started dialysis.

For ALS, your coverage starts the first day of the month you are diagnosed. You have a different enrollment window: it runs from the month of diagnosis through two months after. Because ALS diagnosis is often recent and urgent, Medicare processes these applications quickly.

What happens if you delay enrollment past 65

If you do not sign up during your Initial Enrollment Period and you do not have a may have access to life event (such as losing employer coverage), you will face a permanent penalty. This penalty applies to Part B and Part D premiums.

For Part B, the penalty is 10 percent of the standard premium for each full 12-month period you were may be able to access but did not enroll. If you were may be able to access for three years and did not sign up, your Part B premium will be 30 percent higher than the standard amount — and that increase stays with you for life, even after you finally enroll.

Part D (prescription drug coverage) has a similar penalty: 1 percent of the national average Part D premium for each month you were may be able to access but did not enroll. These penalties are calculated and added to your premium when you finally do sign up.

The exception is if you had creditable coverage — health insurance through an employer or union that was at least as good as Medicare Part D — during the time you delayed. If you can show you had creditable coverage, the penalty may not explore. You will need documentation from your former employer or plan to prove this.

Enrolling if you are still working at 65

If you are still working and covered by your employer's health plan at 65, you have options. You can delay Medicare Part A (hospital insurance) without penalty if your employer has 20 or more employees. However, you should still enroll in Part B during your Initial Enrollment Period, or you may face a penalty later — unless your employer specifically confirms in writing that you are covered under their plan as an active employee.

The rules are complex and depend on your employer's size, whether you are the employee or the spouse of an employee, and what type of coverage you have. Before you turn 65, contact your employer's benefits office and ask them directly: "Do I need to enroll in Medicare while I am still working here?" Get the answer in writing if possible.

If you are self-employed or a business owner, you cannot delay Part B based on work. You should enroll during your Initial Enrollment Period.

How to enroll when you become may be able to access

You can enroll in Medicare three ways: online through Medicare.gov, by phone at 1-800-MEDICARE (1-800-633-4227), or in person at your local Social Security office.

Online enrollment through Medicare.gov is usually the fastest. You will need your Social Security number and information about any current health coverage. The process takes about 10 minutes. If you enroll online, you will receive a confirmation number — save this.

By phone, a Medicare representative can walk you through the process and answer questions in real time. Wait times vary, but calling early in the day or early in the week is usually faster.

In person, you can visit your local Social Security office. Bring your Social Security card, proof of citizenship or legal residency, and proof of age (such as a birth certificate or passport). No appointment is needed, but you may wait. Call ahead to ask about current wait times.

Frequently Asked Questions

What if I turn 65 but do not want Medicare yet?

You still need to enroll during your seven-month Initial Enrollment Period, even if you do not plan to use it. If you skip enrollment and sign up later, you will pay a permanent penalty. The only exception is if you are still working and covered by an employer plan with 20 or more employees — but you must confirm this with your employer in writing first.

Can I enroll in Medicare before my birthday month?

Yes. Your enrollment window opens three months before the month you turn 65. You can sign up as early as three months before, and coverage will start the month you turn 65. Signing up early is a good idea because it gives you time to choose a plan and avoid missing the important date.

What if I missed my Initial Enrollment Period?

You can still enroll during General Enrollment Period, which runs January 1 through March 31 each year. Coverage will start July 1. However, you will pay a permanent 10 percent penalty on your Part B premium for each year you delayed. If you delayed for two years, your premium will be 20 percent higher for life.

Do I have to be a U.S. citizen to enroll in Medicare at 65?

You must be a U.S. citizen or a lawful permanent resident who has lived in the United States for at least five years. When you enroll, you will need to provide proof of citizenship or legal residency, such as a passport, birth certificate, or green card.

If I am on disability and turn 65, does anything change?

No. Your Medicare coverage continues without interruption. Your coverage type stays the same, and your premiums do not change just because you reached 65. You do not need to re-enroll or take any action.