Medicare starts at age 65 for most people

You become may be able to access for Medicare at age 65, regardless of your work history or income. This is the standard may be able to access age set by federal law. You do not have to be retired to sign up — you only have to reach 65.

There are some exceptions. If you are under 65, you may be able to enroll in Medicare if you have been receiving Social Security disability benefits for 24 months, or if you have end-stage renal disease or ALS (amyotrophic lateral sclerosis). Otherwise, age 65 is the threshold.

The month you turn 65 matters for when your coverage begins. Medicare enrollment happens during specific windows, and missing your window can delay your coverage or cost you more in premiums later.

Key Takeaways

  • You become may be able to access for Medicare the month you turn 65, even if you are still working.
  • You must enroll during your Initial Enrollment Period, which runs three months before, the month of, and three months after your 65th birthday.
  • If you miss your enrollment window, you may face permanent premium increases on Part B and Part D coverage.
  • You can enroll online through Medicare.gov, by phone at 1-800-MEDICARE, or in person at your local Social Security office.
  • Some people under 65 may have access to for Medicare if they receive disability benefits or have specific medical conditions.

Your Initial Enrollment Period: the three-month window

Your Initial Enrollment Period is a seven-month window centered on your 65th birthday. It starts 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 should enroll during this window to avoid delays and extra costs. If you enroll before your birthday month, coverage typically starts the month you turn 65. If you enroll in the month of your birthday or after, your coverage may start the following month.

Enrolling late — after your Initial Enrollment Period ends — can trigger a permanent increase to your Part B premium (the medical insurance portion) and your Part D premium (prescription drug coverage). This penalty stays with you for as long as you have Medicare, so the cost of missing the window is real.

How to enroll when you turn 65

You have three main ways to enroll in Medicare. The easiest for most people is online through Medicare.gov, where you can create an account, review your options, and submit your enrollment. You will need your Social Security number and information about any current health coverage.

You can also call 1-800-MEDICARE (1-800-633-4227) to enroll by phone. A representative will walk you through your choices and answer questions about Original Medicare versus Medicare Advantage plans. The line is open seven days a week.

A third option is to visit your local Social Security office in person. Bring your Social Security card, proof of citizenship or legal residency, and proof of age. You can find your nearest office on Social Security's website.

What happens if you are still working at 65

You can enroll in Medicare at 65 even if you are still employed and covered by your employer's health plan. You are not required to retire. However, the rules about when to enroll depend on the size of your employer.

If your employer has 20 or more employees, you may be able to delay enrolling in Part B (medical insurance) without penalty, as long as you stay on your employer plan. This is called the Special Enrollment Period. You can enroll in Part A (hospital insurance) at 65 without penalty regardless of employer size.

If your employer has fewer than 20 employees, you should enroll in both Part A and Part B at 65 to avoid penalties later. Talk to your employer's benefits administrator about how your coverage will coordinate with Medicare.

Medicare for people under 65

Most people under 65 cannot enroll in Medicare, but three groups can. The first group is people who have been receiving Social Security Disability Insurance (SSDI) for 24 consecutive months. Once you hit that 24-month mark, you become may be able to access for Medicare automatically — you do not have to wait until 65.

The second group is people with end-stage renal disease (permanent kidney failure requiring dialysis or a transplant). You become may be able to access for Medicare when ready upon diagnosis, regardless of age.

The third group is people with ALS (amyotrophic lateral sclerosis, also called Lou Gehrig's disease). You become may be able to access for Medicare the month you are approved for SSDI, with no 24-month waiting period.

If you fall into one of these categories, you will receive a notice from Social Security or your dialysis center explaining your Medicare may be able to access. You still need to enroll during your Initial Enrollment Period to avoid delays.

What to do if you miss your enrollment window

If you pass your Initial Enrollment Period without enrolling, you can still sign up, but you may face consequences. Part B and Part D premiums increase by 10 percent for each full 12-month period you were may be able to access but not enrolled. This penalty is permanent — it does not go away after a few years.

You can enroll during the General Enrollment Period, which runs January 1 through March 31 each year. Coverage begins July 1 of that year. This means if you miss your Initial Enrollment Period in 2024, you could enroll in January 2025, but your coverage would not start until July 2025.

There are some exceptions that waive the penalty. If you had creditable coverage (health insurance that is as good as or better than Medicare) through an employer or union, you may not owe a penalty. You will need to provide proof of that coverage when you enroll.

Frequently Asked Questions

Do I have to enroll in Medicare at 65 if I have employer coverage?

It depends on your employer's size. If your employer has 20 or more employees, you can delay Part B enrollment without penalty while you stay on the employer plan. If your employer has fewer than 20 employees, you should enroll in both Part A and Part B at 65 to avoid penalties. Part A has no penalty for late enrollment if you have employer coverage, but Part B does.

What if I turn 65 while I'm traveling or living abroad?

You can still enroll during your Initial Enrollment Period. Use Medicare.gov or call 1-800-MEDICARE from anywhere. Your coverage will begin the same month you turn 65 (or the following month, depending on when you enroll). Living abroad does not change your may be able to access, though some Medicare benefits have limits outside the United States.

Can I enroll in Medicare before I turn 65?

Yes. Your Initial Enrollment Period starts three months before your 65th birthday, so you can enroll as early as three months in advance. Enrolling early is a good idea because it gives you time to review your options and avoid last-minute confusion.

What if I was denied Social Security disability but I'm still unable to work?

If you were denied SSDI, you do not become may be able to access for Medicare before 65 based on disability alone. You would need to appeal your SSDI denial or wait until you turn 65. If you have end-stage renal disease or ALS, those conditions make you may be able to access regardless of SSDI status.

Does my spouse become may be able to access for Medicare when I do?

No. Your spouse becomes may be able to access for Medicare at their own age 65, regardless of when you enrolled. They have their own Initial Enrollment Period based on their birthday. If they are younger than 65, they cannot enroll unless they meet one of the exceptions (disability, end-stage renal disease, or ALS).