Getting Medicare Before You Turn 65: Who Qualifies and How

Yes, you can get Medicare before 65 if you meet one of three conditions

Medicare is not automatically tied to age 65 anymore. You can enroll before that birthday if you have been receiving Social Security Disability Insurance (SSDI) for 24 months, if you have end-stage renal disease (ESRD), or if you have amyotrophic lateral sclerosis (ALS). Each path has different timing and different paperwork, but none of them require you to wait until your 65th birthday.

The key is understanding which condition applies to you and when your coverage actually starts. Timing matters because Medicare does not backdate coverage in most cases — if you miss the window to enroll, you may face a gap in coverage or a permanent penalty on your premiums.

Key Takeaways

You can get Medicare at any age if you have been on SSDI for 24 months, have end-stage renal disease, or have been diagnosed with ALS.
If you receive SSDI, Medicare starts automatically in the 25th month of your disability benefits, with no enrollment step required.
People with ESRD or ALS must enroll in Medicare themselves during their Initial Enrollment Period, which is usually three months before and three months after the may have access to event.
Missing your enrollment window can result in a permanent increase to your Part B premium, so timing your enrollment correctly matters even if you do not plan to use Medicare right away.

Medicare through SSDI: The 24-month rule

If you receive Social Security Disability Insurance, Medicare begins automatically in your 25th month of benefits. You do not need to enroll, fill out forms, or contact anyone — it happens on its own. Your coverage starts on the first day of the month you turn 25 months into your disability claim.

This is the most common path to Medicare before 65. Social Security will send you a Medicare card in the mail before your coverage starts. If you do not receive it about two weeks before your coverage date, contact Social Security to confirm your address is correct.

Your SSDI benefits and your Medicare coverage are separate. You keep receiving your monthly disability payment, and Medicare Part A (hospital insurance) and Part B (medical insurance) begin at the same time. You will have the option to choose a Medigap plan or a Medicare Advantage plan, just as someone turning 65 would.

Medicare for end-stage renal disease (ESRD)

If you have end-stage renal disease and need dialysis or a kidney transplant, you can get Medicare regardless of age. Your coverage can start as early as the first day of the month you begin dialysis or the month of your transplant, whichever comes first.

Unlike SSDI, ESRD coverage does not happen automatically. You must enroll during your Initial Enrollment Period, which runs for three months before the month you become may be able to access, the month you become may be able to access, and three months after. If you miss this window, you can still enroll later, but you may face a permanent 10 percent increase to your Part B premium for each 12-month period you delayed enrollment.

Contact your dialysis center or transplant team — they can help you understand your enrollment timeline and may be able to submit your enrollment paperwork on your behalf. You will need to provide proof of your ESRD diagnosis, usually through your treatment records.

Medicare for ALS (amyotrophic lateral sclerosis)

If you have been diagnosed with ALS, you are may have access to to Medicare at any age. Your coverage can begin as early as the first day of the month you are diagnosed, though the exact start date depends on when you enroll.

Like ESRD, you must enroll yourself during your Initial Enrollment Period: three months before diagnosis, the month of diagnosis, and three months after. The Social Security Administration or your state's disability agency will have determined your diagnosis date based on your medical records, so confirm that date before you enroll to make sure your coverage starts when you expect.

You will need documentation of your ALS diagnosis from your neurologist or treating physician. If you are already receiving SSDI when you are diagnosed with ALS, your Medicare coverage will still begin automatically in your 25th month of benefits — you do not need to do anything extra.

What happens if you miss your enrollment window

If you have ESRD or ALS and do not enroll during your Initial Enrollment Period, you can still enroll later, but the cost goes up. Medicare will add a permanent 10 percent surcharge to your Part B premium for each full 12-month period you waited after your Initial Enrollment Period ended.

For example, if your Initial Enrollment Period ended in June and you do not enroll until the following September, you have waited 15 months. That is one full 12-month period plus three months, so you would pay a 10 percent penalty for life. If you wait two full years, the penalty is 20 percent, and it never goes away.

The only exception is if you have other health insurance that covers the same services Medicare would cover. If you are covered under a spouse's employer plan or another group health plan, you may be able to enroll without penalty during a Special Enrollment Period. Contact Medicare directly to ask whether your situation qualifies.

Choosing your coverage type before 65

Once you are enrolled in Medicare, you have the same choices as someone who turned 65: Original Medicare (Part A and Part B) with a Medigap supplemental plan, or a Medicare Advantage plan. The rules are the same, and the costs work the same way.

If you are under 65 and newly may be able to access for Medicare, you have a one-time chance to enroll in a Medigap plan without medical underwriting — meaning the insurance company cannot turn you down or charge you more because of pre-existing conditions. This is called your Medigap Open Enrollment Period, and it lasts six months from the first day you have both Medicare Part A and Part B. After that window closes, Medigap insurers can deny you or charge higher premiums based on your health.

Medicare Advantage plans have different rules. You can enroll in one during your Initial Enrollment Period, and you can switch plans during the annual open enrollment period each fall. Unlike Medigap, Medicare Advantage plans can use medical underwriting, but in practice most accept people with pre-existing conditions.

How to enroll if you are not on SSDI

If you have ESRD or ALS, you need to enroll in Medicare yourself. You can do this online at Medicare.gov, by phone at 1-800-MEDICARE, or in person at your local Social Security office.

Have your diagnosis documentation ready — a letter from your doctor stating your diagnosis date and the type of treatment you are receiving (for ESRD) or confirmation of your ALS diagnosis. You will also need your Social Security number and proof of citizenship or legal residency.

Enroll as early in your Initial Enrollment Period as possible. If you enroll in the first month of your window, your coverage will start on the first day of the following month. If you enroll later, there may be a delay before coverage begins, so do not wait until the last month of your enrollment period.

Frequently Asked Questions

Do I have to be on SSDI to get Medicare before 65?

No. You can also get Medicare if you have end-stage renal disease or ALS, regardless of whether you receive disability benefits. However, SSDI is the most common path — if you are receiving SSDI, Medicare starts automatically in your 25th month of benefits with no enrollment needed.

What if I turn 65 while I am already on Medicare?

Nothing changes. Your Medicare coverage continues without interruption. You do not need to re-enroll or switch plans just because you turned 65. If you want to make changes to your coverage, you can do so during the annual open enrollment period in the fall, just like anyone else on Medicare.

Can I delay Medicare if I am on SSDI and do not want it yet?

No. Medicare enrollment is automatic in your 25th month of SSDI benefits and cannot be delayed. However, you can choose not to enroll in Part B if you have other health insurance through an employer or spouse's plan, though you will still be enrolled in Part A (hospital insurance).

Will I have a gap in coverage if I miss my enrollment window?

Possibly. If you have ESRD or ALS and miss your Initial Enrollment Period, you can enroll later, but your coverage will not start until the month after you enroll. During that gap, you are responsible for your own medical costs. Additionally, you will face a permanent premium penalty.

What if my employer offers health insurance — do I still need Medicare?

If you are under 65 and newly may be able to access for Medicare through SSDI, ESRD, or ALS, you must enroll in Medicare Part A. You can delay Part B if you have employer coverage, but you should contact Medicare to understand how your employer plan coordinates with Medicare to avoid coverage gaps.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.