How SSDI and Medicare Connect—And When You Get One Without the Other

You don't have to be on SSDI to get Medicare, but SSDI is one of the main ways people under 65 become may be able to access

Medicare is a federal health insurance program. SSDI is a cash benefit program. They are separate things run by separate parts of Social Security, and you can have one without the other. However, if you receive SSDI, Medicare is automatically included after you have been on SSDI for 24 months. That automatic connection is why many people think you need SSDI to get Medicare—but there are other paths to Medicare that have nothing to do with SSDI.

The confusion happens because SSDI is the most common way people under 65 enter Medicare. But you can also reach Medicare through End-Stage Renal Disease (ESRD), through ALS, or by turning 65. Each path has different rules about timing and what you have to do to enroll.

Key Takeaways

SSDI recipients automatically receive Medicare after 24 months on the program, but you do not need SSDI to get Medicare.
You can reach Medicare before age 65 through ESRD (kidney failure), ALS (Lou Gehrig's disease), or by being on SSDI for 24 months.
If you have ESRD or ALS, you may be may be able to access for Medicare when ready or within a short waiting period, regardless of SSDI status.
If you turn 65, you become may be able to access for Medicare regardless of whether you have ever received SSDI or any other benefit.
You must actively enroll in Medicare Part B and Part D during your enrollment window, even if you receive SSDI—Medicare does not happen automatically.

The three ways to get Medicare before age 65

Social Security recognizes three categories of people under 65 who can receive Medicare. The first is people who have been on SSDI for 24 months. The second is people with End-Stage Renal Disease (ESRD)—permanent kidney failure requiring dialysis or a transplant. The third is people with ALS (amyotrophic lateral sclerosis, also called Lou Gehrig's disease).

If you fall into any of these three groups, you become may be able to access for Medicare. SSDI is only one of the three doors. You do not have to walk through the SSDI door to reach Medicare if you can walk through one of the other two.

ESRD and ALS: Medicare without SSDI

If you have End-Stage Renal Disease, you become may be able to access for Medicare the first day of the month in which you start dialysis treatment or the month you receive a kidney transplant. You do not have to be on SSDI. You do not have to be on any benefit. You do not have to have worked. ESRD alone opens the door to Medicare.

If you have ALS, you become may be able to access for Medicare when ready upon approval for SSDI—not after 24 months like other SSDI recipients. This is a special rule for ALS only. However, you still have to be approved for SSDI first; ALS does not give you Medicare without going through the SSDI process.

If you have ESRD or ALS, you should contact Social Security to report your condition. Social Security will tell you the exact month your Medicare coverage begins and what you need to do to enroll in the parts of Medicare you want.

What happens when you reach 24 months on SSDI

If you are on SSDI and you have been receiving benefits for 24 months, you automatically become may be able to access for Medicare Part A (hospital insurance) and Part B (medical insurance). You do not have to explore. Social Security will send you a notice telling you that Medicare is beginning.

However, automatic may be able to access is not the same as automatic enrollment. You become may be able to access for Part A automatically, and Part A coverage begins without any action on your part. But Part B requires you to enroll. If you do not enroll in Part B during your enrollment window, you may face a permanent penalty on your premiums.

Part D (prescription drug coverage) also requires you to enroll. If you go without Part D coverage and later enroll, you may also face a penalty. Social Security will explain your enrollment important date in the notice they send you.

What you have to do to enroll in Medicare

When you become may be able to access for Medicare—whether through SSDI, ESRD, ALS, or age 65—you receive a notice from Social Security. This notice tells you when your coverage begins and what parts you are may be able to access for. It also tells you your enrollment important date.

For Part B, you have a seven-month window centered on your may be able to access month. If you are may be able to access in March, your window runs from December through June. You can enroll anytime during this window without penalty. If you miss this window, you can still enroll later, but you will pay a higher premium for as long as you have Medicare.

For Part D, the important date is the end of the month in which you become may be able to access. If you miss this important date, you pay a penalty each month you are enrolled in Part D later. You can enroll in Part D through Medicare.gov, by phone at 1-800-MEDICARE, or by visiting a local Social Security office.

SSDI and Medicare are separate programs with separate rules

SSDI is a monthly cash payment. Medicare is health insurance. They come from the same agency (Social Security), but they operate independently. You can receive SSDI without Medicare (if you have been on SSDI for fewer than 24 months). You can receive Medicare without SSDI (if you have ESRD, ALS, or you are 65 or older). You can have both. You can have neither.

The connection between them—the 24-month rule—exists because Congress decided that people who have been disabled long enough to receive SSDI for two years should also have health coverage. But that rule does not mean SSDI is required to get Medicare. It means that if you are on SSDI, Medicare comes along after 24 months.

If you are trying to understand your own situation, the question to ask is: "Which of the three categories do I fall into?" Are you on SSDI? Do you have ESRD? Do you have ALS? Do you turn 65 this year? Your answer determines when you become may be able to access for Medicare, not whether you do.

What to do if you think you might be may be able to access for Medicare

If you have ESRD or ALS, contact Social Security directly. Call 1-800-772-1213 (TTY 1-800-325-0778) or visit your local Social Security office. Tell them about your condition and ask when your Medicare may be able to access begins. They will walk you through the enrollment process.

If you are on SSDI and approaching your 24-month mark, Social Security will contact you. You do not have to do anything to become may be able to access for Part A. But you should watch for the notice about Part B and Part D enrollment important date, because missing those important date costs you money in penalties.

If you are not sure whether you are on SSDI, you can check your Social Security account at ssa.gov. Create an account, sign in, and look at your benefit history. If you see monthly payments listed, you are receiving SSDI. If you have questions about what you see, call Social Security.

Frequently Asked Questions

Can I get Medicare if I am on SSDI but have not been for 24 months yet?

No. You become may be able to access for Medicare only after you have been on SSDI for 24 months. During those first 24 months, you have SSDI but not Medicare. If you need health coverage before then, you may be able to purchase a plan through the health insurance marketplace or look into Medicaid, which is a separate program run by your state.

If I have ESRD, do I still have to go through the SSDI process to get Medicare?

No. ESRD alone makes you may be able to access for Medicare. You do not have to be on SSDI or any other benefit. However, if you also want the monthly cash payment that SSDI provides, you would need to explore for SSDI separately. Medicare and SSDI are two different things.

What if I turn 65 while I am on SSDI?

When you turn 65, your SSDI automatically converts to Social Security retirement benefits. The amount stays the same. Your Medicare coverage continues without interruption. You do not have to do anything—Social Security handles the conversion automatically.

Do I have to enroll in all parts of Medicare, or can I choose?

You become may be able to access for Part A automatically and it covers you automatically. Part B and Part D require you to enroll. You can choose to enroll in Part B, Part D, both, or neither. However, if you delay enrollment past your important date, you will pay penalties later. Talk to Medicare or Social Security about which parts make sense for your situation.

What happens if I miss my Medicare enrollment important date?

If you miss your Part B important date, you pay a permanent 10 percent increase to your premium for each year you were may be able to access but not enrolled. If you miss your Part D important date, you pay a penalty each month you are enrolled in Part D later. You can still enroll after missing the important date, but the penalties explore. Call 1-800-MEDICARE to discuss your options.

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.