When Medicare Coverage Starts If You Receive SSDI

Medicare begins 24 months after your SSDI payments start

If you receive Social Security Disability Insurance (SSDI), Medicare coverage begins automatically after you have been receiving SSDI payments for 24 consecutive months. You do not need to do anything to trigger this — Social Security tracks the months for you and enrolls you in Medicare Part A (hospital insurance) and Part B (medical insurance) without requiring a separate request.

The 24-month waiting period starts from the first month you receive an SSDI payment, not from the month you applied. This means if your SSDI payments began in January, your Medicare coverage would start in January of the following year, two years later. Social Security will send you a Medicare card in the mail about a month before your coverage begins.

There is one exception: if you are under 65 and have end-stage renal disease (ESRD) or amyotrophic lateral sclerosis (ALS), you may be able to begin Medicare sooner. People with ALS can receive Medicare when ready upon SSDI approval. Those with ESRD can begin Medicare after three months of SSDI payments or a month after starting dialysis, whichever comes first.

Key Takeaways

• Medicare Part A and Part B begin automatically 24 months after your first SSDI payment, with no action required on your part.
• Social Security sends your Medicare card about one month before coverage starts, so you will have it in hand before you need it.
• If you have ALS, Medicare begins when ready when your SSDI is approved; if you have ESRD, it begins after three months of SSDI payments.
• You will still pay the standard Medicare Part B premium, which is deducted from your SSDI payment each month.

What happens during the 24-month waiting period

While you are waiting for Medicare to begin, you may have other coverage options. Many people on SSDI are also covered by Medicaid, which is a separate program run by your state. Medicaid covers medical expenses during the months before Medicare starts, and the rules for Medicaid vary by state — some states cover people on SSDI automatically, while others require a separate process.

If you do not have Medicaid and cannot afford private insurance, you can purchase coverage through the Health Insurance Marketplace (also called the ACA marketplace). You may be able to receive a subsidy to lower your monthly premium if your income is low enough. The Marketplace opens for enrollment each year in the fall, though you can enroll year-round if you have a may have access to life event, such as losing other coverage.

Some people on SSDI also have employer-sponsored insurance through a spouse's job or their own work. If you are working and earning income while on SSDI, you can keep that insurance and coordinate it with Medicare once it begins.

How Medicare premiums work with your SSDI payment

When your Medicare coverage begins, Social Security automatically deducts the Part B premium from your monthly SSDI payment. The Part B premium amount changes each year and is set by the federal government. For 2024, the standard Part B premium is $164.90 per month, though some people pay more if their income is above a certain threshold.

You do not pay a premium for Medicare Part A (hospital insurance) if you have worked and paid Social Security taxes for at least 10 years, which most people on SSDI have done. The Part A coverage is included at no cost.

If you also enroll in Medicare Part D (prescription drug coverage) or a Medicare Advantage plan, those have their own premiums that you pay separately. Part D premiums vary depending on which plan you choose, and Medicare Advantage plans sometimes have no premium but charge copays and deductibles instead.

What to do when your Medicare card arrives

About one month before your Medicare coverage begins, Social Security will mail your Medicare card to the address they have on file. The card shows your Medicare number, which is different from your Social Security number. Keep this card in a safe place — you will need to show it to doctors, hospitals, and pharmacies.

Once you receive the card, review it for errors. If your name, date of birth, or Medicare number is wrong, contact Social Security when ready to request a corrected card. Errors can cause claims to be denied or delayed.

You should also update your doctors' offices with your new Medicare information. Call ahead and let them know your Medicare coverage is starting, so they can update their records and bill Medicare instead of Medicaid or any other insurance you may have had.

Coordinating Medicare with other insurance

If you have Medicaid when Medicare begins, both programs will work together. Medicare becomes your primary insurance, meaning it pays first, and Medicaid pays some of the costs that Medicare does not cover. This is called "dual coverage," and it can significantly reduce your out-of-pocket costs.

If you have employer-sponsored insurance through a spouse or your own work, you can keep that insurance and let it work alongside Medicare. The order in which they pay depends on the size of the employer and other factors — your employer's benefits office or your insurance company can tell you which insurance is primary.

If you have a Medicare Advantage plan (Part C) instead of Original Medicare (Part A and B), you cannot also use Medicaid to cover the same services. You must choose one or the other. Many people on SSDI choose Original Medicare with Medicaid because it offers more flexibility in choosing doctors.

What Medicare does and does not cover

Medicare Part A covers hospital stays, skilled nursing facility care, hospice, and some home health services. Part B covers doctor visits, outpatient care, medical equipment, and preventive services. Together, they cover most acute medical care, but they do not cover everything.

Medicare does not cover long-term custodial care (such as assisted living or nursing home care for non-medical reasons), dental care, vision care, hearing aids, or most prescription drugs. Part D (prescription drug coverage) is optional and covers many medications, but you must enroll in a plan and pay a separate premium.

If you have Medicaid in addition to Medicare, Medicaid may cover some of these gaps, depending on your state's rules. For example, some states cover dental care through Medicaid, while others do not.

If you return to work and lose SSDI

If your earnings increase and you no longer meet the income limits for SSDI, your SSDI payments will stop. However, your Medicare coverage does not stop when ready. You can continue Medicare for up to 93 months (about 7.75 years) after your SSDI ends, as long as you pay the Part B premium yourself.

This extended coverage is called "Medicare continuation," and it gives you time to find other insurance or return to work-based coverage without a gap. Social Security will notify you when your SSDI ends and explain how to continue paying for Medicare.

Frequently Asked Questions

Do I have to do anything to get Medicare when the 24 months are up?

No. Social Security automatically enrolls you in Medicare Part A and Part B once you have received 24 months of SSDI payments. You will receive your Medicare card in the mail about a month before coverage begins. You do not need to submit any forms or contact anyone.

What if I have Medicaid now — will it stop when Medicare starts?

No. Medicaid and Medicare work together. When Medicare begins, it becomes your primary insurance, and Medicaid continues to cover costs that Medicare does not pay. You keep both programs unless your state's rules change or your income increases above the Medicaid limit.

Can I get Medicare before 24 months if I have a serious illness?

Yes, but only if you have ALS or end-stage renal disease. People with ALS receive Medicare when ready upon SSDI approval. People with ESRD can begin Medicare after three months of SSDI payments or one month after starting dialysis, whichever comes first. Other conditions do not may have access to for early Medicare.

What happens to my Medicare if I go back to work and my SSDI stops?

Your Medicare does not stop right away. You can continue Medicare for up to 93 months after your SSDI ends, as long as you pay the Part B premium yourself each month. Social Security will explain the payment process when your SSDI ends.

Will I have to pay for Medicare Part A?

No, if you have worked and paid Social Security taxes for at least 10 years. Most people on SSDI meet this requirement and receive Part A at no cost. You will only pay the Part B premium, which is deducted from your SSDI payment.