You must be 65 years old to get Medicare, with rare exceptions for younger people with disabilities or end-stage renal disease

Medicare may be able to access is tied to age 65 for most people. You become may be able to access the month you turn 65, and you can sign up starting three months before that birthday. The program does not make exceptions for early retirement or financial need — age 65 is the standard threshold.

There are two narrow paths to Medicare before 65. If you have been receiving Social Security Disability Insurance (SSDI) for 24 consecutive months, you become may be able to access at any age. If you have end-stage renal disease (ESRD) — permanent kidney failure requiring dialysis or transplant — you can get Medicare regardless of age, though the process and timing differ from age-based enrollment.

Citizenship or legal residency is also required. You must be a U.S. citizen or a permanent resident who has lived in the country for at least five consecutive years.

Key Takeaways

  • You can sign up for Medicare three months before you turn 65, and coverage begins the month you reach that age.
  • If you receive SSDI, you become may be able to access for Medicare after 24 months on disability, regardless of your age.
  • People with end-stage renal disease can get Medicare at any age, but enrollment works differently than standard age-based signup.
  • Missing the initial signup window when you turn 65 can result in permanent penalties on your premiums, so timing matters.

When your Medicare coverage actually starts

Your Medicare coverage begins on the first day of the month you turn 65. If your birthday is January 15, your coverage starts January 1. If your birthday is January 1, your coverage also starts January 1. The program does not prorate coverage by the day of the month.

You can sign up as early as three months before your 65th birthday. Most people should sign up during this window to avoid a gap in coverage. If you wait until after you turn 65, you can still sign up, but you may face late enrollment penalties that increase your premiums permanently.

The initial enrollment period lasts seven months total: three months before the month you turn 65, the month you turn 65, and three months after. If you miss this window and do not have coverage from an employer or union, you will pay a 10 percent increase on your Part B premium for every 12 months you were not signed up.

Younger people on disability: the 24-month SSDI rule

If you receive SSDI, you become may be able to access for Medicare after you have been on disability for 24 consecutive months. This means the clock starts from the month your SSDI benefits begin, not from the month you filed. You do not have to wait until age 65.

Social Security will contact you automatically when you reach 24 months on SSDI and will enroll you in Medicare Part A and Part B. You do not need to do anything — the enrollment happens without your action. Your coverage begins the 25th month of your disability.

If you want to decline Part B (the medical insurance portion) when you are automatically enrolled, you can do so, but you must contact Social Security to make that choice. Part A (hospital insurance) is automatic and you cannot turn it down.

End-stage renal disease: when ready may be able to access at any age

If you have end-stage renal disease and need dialysis or a kidney transplant, you can get Medicare when ready, regardless of age. ESRD is one of the few conditions that overrides the age 65 requirement.

Your Medicare coverage begins the first month you receive dialysis treatment or the month of your kidney transplant, whichever comes first. If you are already on dialysis when you learn about this, you can still sign up retroactively — Medicare can cover you back to the month your treatment started, though you will need medical records to prove the start date.

You will be enrolled in both Part A and Part B automatically once your dialysis center or transplant team reports your condition to Social Security. Like SSDI recipients, you can decline Part B if you choose, but you must notify Social Security in writing.

What happens if you miss the signup window

If you turn 65 and do not sign up during your seven-month initial enrollment period, you can still sign up later, but penalties explore. The most common penalty is a permanent 10 percent increase to your Part B premium for each 12-month period you were not enrolled.

There is a General Enrollment Period from January 1 to March 31 each year, during which you can sign up without a special reason. Coverage would begin July 1 of that year. But the premium penalty still applies if you missed your initial window.

The only way to avoid the penalty is to show you had creditable coverage from an employer or union during the time you were not on Medicare. Creditable coverage means health insurance through a current or former employer, a spouse's employer, or COBRA. If you can document this, you can sign up later without penalty.

Employer coverage and the decision to delay Medicare

If you are still working at 65 and have health insurance through your employer, you may not need to sign up for Medicare right away. However, the rules depend on the size of your employer and whether you are the employee or the spouse of an employee.

If your employer has 20 or more employees, you can delay Medicare Part B without penalty as long as you stay on the employer plan. You have eight months after you leave the job or lose the coverage to sign up for Medicare without a late penalty. This is called the Special Enrollment Period.

If your employer has fewer than 20 employees, you must sign up for Medicare when you turn 65, even if you have employer coverage. Failing to do so will trigger the permanent premium penalty. You should still sign up for Part A (hospital insurance) at 65 even if you delay Part B, because Part A has no premium and waiting can result in a penalty.

How to sign up when you reach 65

You can sign up for Medicare online through Medicare.gov, by phone at 1-800-MEDICARE, or in person at your local Social Security office. Online signup is usually the fastest route and can be done three months before your birthday.

You will need your Social Security number, proof of citizenship or legal residency (such as a birth certificate or passport), and proof of residency (such as a utility bill or lease). If you are signing up based on a spouse's work record, you will also need their Social Security number.

If you are already receiving Social Security benefits, your signup may happen automatically. Social Security will send you a notice in the mail about three months before you turn 65. If you receive SSDI or are on the railroad retirement system, enrollment is automatic at the appropriate time.

Frequently Asked Questions

Can I get Medicare before 65 if I retire early?

No. Early retirement does not change the age requirement. You must be 65, have SSDI for 24 months, or have end-stage renal disease. If you retire before 65, you will need to find coverage through the Affordable Care Act marketplace, COBRA, or a spouse's plan until you reach 65.

What if I am not a U.S. citizen?

You must be a U.S. citizen or a permanent resident who has lived in the country for at least five consecutive years. If you are a permanent resident but have not met the five-year requirement, you cannot get Medicare at 65. Undocumented immigrants are not may be able to access for Medicare.

Do I have to sign up for Medicare if I have VA benefits?

No, but you should still sign up for Part A at 65 because it is free and has no premium. Part B has a premium, and you can decline it if you have VA coverage. However, if you later want Part B, you may face a late enrollment penalty unless you can prove you had creditable coverage.

What if I am still working at 65 and do not want Medicare yet?

If your employer has 20 or more employees, you can delay Part B without penalty as long as you work there and stay on the plan. You have eight months after leaving the job to sign up. You should still sign up for Part A because it is free and has no penalty for waiting.

Can my spouse sign up for Medicare at 65 based on my work record?

Yes. Your spouse can sign up for Medicare at 65 based on your work record even if they did not work or did not work long enough to may have access to on their own. They will need your Social Security number and proof of your work history when they sign up.