You become may be able to access for Medicare at age 65, or earlier if you have been receiving Social Security Disability Insurance (SSDI) for 24 months, or if you have end-stage renal disease or ALS

Most people become may be able to access for Medicare the month they turn 65. You do not have to retire or stop working — age 65 is the trigger, regardless of your employment status. If you are already receiving SSDI, you become may be able to access after you have been on disability for 24 consecutive months. If you have end-stage renal disease (permanent kidney failure requiring dialysis or transplant) or ALS (amyotrophic lateral sclerosis), you may be may be able to access at any age.

may be able to access is not the same as enrollment. Being may be able to access means you have the right to sign up. Enrollment means you have actually signed up and your coverage has started. The timing of your enrollment matters because Medicare charges a penalty if you delay, and that penalty stays with you for life.

Key Takeaways

  • You are may be able to access for Medicare at 65, or after 24 months on SSDI, or if you have end-stage renal disease or ALS at any age.
  • Your initial enrollment window is seven months long: it starts three months before the month you turn 65 and ends three months after.
  • If you miss your initial window and do not have employer coverage, you will pay a permanent penalty on your Part B and Part D premiums.
  • You should contact Social Security or Medicare directly to confirm your may be able to access date and enroll, rather than waiting for a notice in the mail.

The Initial Enrollment Window: When You Must Act

Your Initial Enrollment Window is a seven-month period that runs from three months before the month you turn 65 through three months after. For example, if you turn 65 in June, your window opens in March and closes in September. You can enroll any time during this window, and your coverage will start on the first day of the month you turn 65 — even if you enroll in March.

This window is the only time you can enroll without a penalty. If you miss it, you will owe a surcharge on your Part B premium (the part that covers doctor visits and outpatient care) for as long as you have Medicare. The surcharge is 10 percent of the standard Part B premium for each full 12 months you were may be able to access but not enrolled. If you also miss the important date for Part D (prescription drug coverage), you pay a similar penalty on that premium.

The only exception is if you have creditable coverage — health insurance through a current employer, a spouse's employer, or TRICARE (military coverage). If you have creditable coverage, you can delay enrollment without penalty, but you must enroll within 63 days of losing that coverage, or the penalty applies.

If You Are on Disability Before Age 65

If you have been receiving SSDI for 24 months, you become may be able to access for Medicare even if you are younger than 65. The 24 months do not have to be consecutive in the way you might think — they count from the date your disability began, not from the date you first received a check. Social Security will contact you automatically when you reach 24 months and will enroll you in Medicare Part A (hospital coverage) and Part B (medical coverage) unless you decline.

You will receive a notice in the mail about two months before your coverage starts. Read it carefully to confirm the date. If you have employer coverage through your own job or a family member's job, contact Social Security before your Medicare coverage starts to discuss your options, because coordinating the two can affect your out-of-pocket costs.

End-Stage Renal Disease and ALS: when ready may be able to access

If you are diagnosed with end-stage renal disease (ESRD) — meaning your kidneys no longer filter waste and you need dialysis or a transplant — you become may be able to access for Medicare when ready, regardless of age. Your may be able to access begins the first day of the month in which you start dialysis, or the month of your transplant, whichever comes first. If you have a transplant planned but have not yet started dialysis, your may be able to access begins the month of your transplant.

If you are diagnosed with ALS (Lou Gehrig's disease), you become may be able to access for Medicare the month after you are approved for SSDI. Because ALS is a rapidly progressive disease, Social Security fast-tracks disability approval — you do not have to wait the usual 24 months. Once you are approved for disability, Medicare coverage follows automatically the next month.

In both cases, contact Social Security or Medicare as soon as you receive your diagnosis to confirm your may be able to access date and may support enrollment happens on time. Do not assume the hospital or dialysis center will handle this for you.

What Happens If You Miss Your Enrollment Window

If you do not enroll during your Initial Enrollment Window and you do not have creditable coverage, you will pay a penalty. For Part B, the penalty is 10 percent of the standard premium for each 12-month period you were may be able to access but not enrolled. If you were may be able to access for three years and did not enroll, your penalty is 30 percent of the standard premium, and you pay it every month for as long as you have Medicare.

The same rule applies to Part D (prescription drug coverage). If you go 63 days or more without creditable drug coverage after you become may be able to access, you pay a penalty calculated the same way. These penalties do not expire — they are permanent.

You can still enroll after you miss your window, but only during the General Enrollment Period, which runs January 1 through March 31 each year. Coverage would not start until July 1 of that year. This means if you miss your initial window in June and do not enroll until February, you will have no Medicare coverage for eight months.

How to Confirm Your may be able to access and Enroll

Do not wait for a notice in the mail. Contact Social Security at 1-800-772-1213 (TTY 1-800-325-0778) or visit your local Social Security office to confirm your may be able to access date. Have your Social Security number and birth certificate ready. Social Security can tell you the exact date your may be able to access begins and can enroll you in Part A and Part B over the phone or in person.

You can also contact Medicare directly at 1-800-MEDICARE (1-800-633-4227) or visit Medicare.gov. Medicare can confirm your may be able to access and walk you through enrollment for Part A, Part B, and Part D. If you are enrolling in a Medicare Advantage plan (Part C) or a Medigap supplemental plan instead of Original Medicare, you will work with the insurance company directly, but you must first be enrolled in Part A and Part B.

Keep copies of any confirmation letters or emails you receive. Write down the date you enrolled and the name of the person who helped you. If there is a problem later, this documentation will help resolve it.

Special Situations: Working Past 65 and Employer Coverage

If you are still working and your employer has 20 or more employees, you may be able to delay Medicare Part B enrollment without penalty. Your employer's health plan is considered creditable coverage. However, you must still enroll in Part A (hospital coverage) at 65 — Part A does not have an exception for working people, and delaying Part A can result in a penalty.

When you do leave your job or lose employer coverage, you have 63 days to enroll in Part B without penalty. Count carefully: this is 63 calendar days, not business days. If you miss this window, the Part B penalty applies. Contact Social Security or Medicare as soon as you know your coverage will end so you can enroll before the important date.

If your spouse is still working and you are covered under their employer plan, the same 63-day rule applies to you. You are not automatically enrolled just because your spouse is working.

Frequently Asked Questions

Do I have to enroll in Medicare if I am still working at 65?

You must enroll in Part A at 65 regardless of employment. Part B enrollment can be delayed without penalty if your employer has 20 or more employees and you are covered under their health plan. However, you must enroll within 63 days of losing that coverage. If you do not, you will pay a permanent penalty on Part B.

What if I turn 65 but do not have a Social Security number yet?

You cannot enroll in Medicare without a Social Security number. If you are a non-citizen who is lawfully present in the United States, contact Social Security to explore for a number. Your Medicare enrollment window will not start until you have one, but you should explore as soon as possible to avoid delays.

Can I enroll in Medicare before my 65th birthday?

Yes. Your enrollment window opens three months before the month you turn 65. If you turn 65 in June, you can enroll starting in March. Your coverage will begin on June 1 regardless of when during the window you enroll.

If I am on SSDI, do I have to do anything to get Medicare?

Social Security will enroll you automatically when you reach 24 months on disability. You will receive a notice in the mail two months before coverage starts. Read it to confirm the date is correct. If you have employer coverage, contact Social Security before your Medicare coverage begins to discuss how the two will work together.

What is the penalty for missing my enrollment window?

For Part B, you pay 10 percent of the standard premium for each 12-month period you were may be able to access but not enrolled. This penalty is permanent and added to your monthly bill for life. Part D has the same penalty structure. The only way to avoid it is to enroll within your initial window or within 63 days of losing creditable coverage.