You can start Medicare at 65, but you may be able to start earlier if you have a disability or end-stage renal disease

The standard age to start Medicare is 65. Most people become may be able to access on the first day of the month they turn 65, or the month after, depending on their birthday. But age 65 is not the only way in. If you have been receiving Social Security disability benefits for 24 months, you become may be able to access at any age. If you have end-stage renal disease (permanent kidney failure requiring dialysis or transplant), you may be may be able to access regardless of age. If you are a railroad retiree, different rules explore.

The month you turn 65 matters because Medicare enrollment windows open and close around that date. Missing the window can mean delayed coverage and higher premiums for the rest of your life. Understanding which path applies to you — and when to act — prevents costly gaps.

Key Takeaways

  • You become may be able to access for Medicare the month you turn 65 if you are a U.S. citizen or permanent resident who has lived in the country for at least five years.
  • If you receive Social Security disability benefits, 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 become may be able to access for Medicare when ready upon diagnosis, even before age 65.
  • Your initial enrollment period runs from three months before you turn 65 through three months after, and missing it can result in permanent premium penalties.
  • If you are still working and have employer health coverage at 65, you may be able to delay enrollment without penalty, but you must notify Medicare.

Medicare may be able to access at age 65

To be may be able to access for Medicare at 65, you must be a U.S. citizen or a permanent resident who has lived in the United States for at least five consecutive years. You do not need to be retired — you can still be working. You do not need to have paid a certain amount into Social Security, though most people have.

Your may be able to access begins on the first day of the month you turn 65. If your birthday is on the first of the month, your coverage starts that day. If your birthday is any other day, coverage starts the first day of the following month. For example, if you turn 65 on March 15, your Medicare coverage begins April 1.

Becoming may be able to access through disability before age 65

If you receive Social Security Disability Insurance (SSDI) benefits, you become may be able to access for Medicare after you have been receiving those benefits for 24 months. This applies regardless of your age. A person who starts receiving SSDI at age 40 becomes may be able to access for Medicare at age 42, after the 24-month waiting period ends.

The 24 months are counted from the month your disability benefits began, not from the month you applied. Your Medicare coverage then begins on the 25th month of your disability. You do not need to do anything special — Social Security will notify Medicare automatically, and your coverage will start without a separate enrollment step.

End-stage renal disease and when ready may be able to access

If you have end-stage renal disease — meaning your kidneys no longer work and you need dialysis or a transplant to survive — you may become may be able to access for Medicare when ready, regardless of age. This includes people in their 20s, 30s, or 40s who develop kidney failure.

Your may be able to access begins the first month you are medically determined to have end-stage renal disease, even if you have not yet started dialysis. You will need to provide medical documentation of your diagnosis to Medicare. Unlike the disability pathway, there is no waiting period. Contact your dialysis center or transplant team — they can help you understand the enrollment process and connect you with Social Security.

Railroad retirement and special rules

If you are a railroad retiree, you may be covered under the Railroad Retirement Board rather than Social Security. Railroad employees have different may be able to access rules and timelines. If you worked for a railroad, contact the Railroad Retirement Board directly to learn when you become may be able to access and what steps you need to take.

Do not assume that standard Medicare rules explore to you if you have railroad employment history. The Railroad Retirement Board administers its own system, and the enrollment windows and age requirements differ.

What happens during your initial enrollment period

Your initial enrollment period is a seven-month window: three months before the month you turn 65, the month you turn 65, and three months after. During this time, you can enroll in Medicare Part A (hospital insurance) and Part B (medical insurance) without penalty.

If you miss this window, you will face a permanent increase to your Part B premium — roughly 10 percent more for each year you delayed. This penalty stays with you for life, even if you enroll later. The only exception is if you had employer health coverage through your job or your spouse's job at the time you turned 65. In that case, you may be able to delay without penalty, but you must notify Medicare in writing that you are covered by an employer plan.

Delaying enrollment if you have employer coverage

If you are still working at 65 and your employer offers health insurance, you may not need to enroll in Medicare right away. You can delay Part B enrollment without penalty as long as you are covered by an active employer plan. This applies whether the coverage is through your own job or through your spouse's job.

However, you must tell Medicare that you have employer coverage. You do this by contacting Social Security or Medicare directly and stating that you are delaying enrollment due to employer health insurance. Without this notification, you will still face late-enrollment penalties even though you had coverage. Once you leave your job or lose the employer coverage, you have eight months to enroll in Medicare Part B without penalty.

Frequently Asked Questions

Can I start Medicare before I turn 65?

Yes, if you have been receiving Social Security disability benefits for 24 months, or if you have end-stage renal disease. Otherwise, you must wait until the month you turn 65. Railroad retirees may have different timelines — contact the Railroad Retirement Board to confirm.

What if I turn 65 but I am still working?

You can still enroll in Medicare. You do not have to be retired. If your employer offers health coverage, you may delay Part B enrollment without penalty, but you must notify Medicare that you have employer coverage. Part A (hospital insurance) typically has no premium if you paid Medicare taxes while working, so many people enroll in Part A even if they delay Part B.

Do I lose Medicare if I move out of the United States?

Medicare coverage generally does not work outside the U.S., except for limited situations in Canada and Mexico. If you plan to move abroad, contact Medicare to understand what coverage you will have and whether you should keep your enrollment active.

What if I miss my initial enrollment period?

You can still enroll, but you will face a permanent premium penalty on Part B — roughly 10 percent more for each year you delayed. The only way to avoid this penalty after the fact is if you had employer health coverage when you turned 65 and can prove it. Enroll as soon as you can to stop the penalty from growing.

How do I know if I am a permanent resident for Medicare purposes?

You must have a green card and have lived in the United States for at least five consecutive years. If you are unsure about your status, contact Social Security or Medicare directly with your immigration documents. They can confirm whether you meet the residency requirement.