Medicare is included with SSDI after you've been receiving benefits for 24 months

When you receive Social Security Disability Insurance (SSDI), you automatically become covered by Medicare after you have been on SSDI for 24 consecutive months. This is not something you have to request — it happens automatically. Medicare Part A (hospital insurance) and Part B (medical insurance) both begin on the first day of the 25th month of your SSDI may be able to access.

This is different from regular Social Security retirement benefits, where Medicare starts at age 65. With SSDI, the 24-month waiting period is the trigger, regardless of your age. If you became disabled at 30 and started receiving SSDI, you would have Medicare coverage by age 32.

You will receive a Medicare card in the mail before your coverage begins. The card shows your Medicare number, which is usually your Social Security number followed by a letter. Keep this card with you when you see doctors or go to the hospital.

Key Takeaways

  • Medicare Part A and Part B coverage begins automatically after 24 months of SSDI, with no application needed on your part.
  • You pay a monthly premium for Part B (medical insurance) unless your income is very low, in which case Medicaid may cover it.
  • Some people with SSDI remain on Medicaid instead of or alongside Medicare, depending on their state and income.
  • You can add prescription drug coverage (Part D) and supplemental coverage (Medigap or Medicare Advantage) to fill gaps in what Medicare pays.

What Medicare Part A and Part B cover

Medicare Part A covers hospital stays, skilled nursing facility care after a hospital stay, hospice care, and some home health services. There is no monthly premium for Part A — it is paid for through payroll taxes. You do pay a deductible when you enter the hospital, and you pay coinsurance (a percentage of costs) for longer stays.

Medicare Part B covers doctor visits, outpatient care, medical equipment, and preventive services like screenings and vaccines. Part B has a monthly premium, which changes each year. For 2024, the standard premium is $164.90 per month, but the amount varies based on your income. If your income is higher, you may pay more. If your income is very low, your state's Medicaid program may pay your Part B premium for you.

Neither Part A nor Part B covers dental, vision, or hearing care. They also do not cover long-term custodial care in a nursing home. These gaps are why many people on Medicare add supplemental coverage.

Medicaid and SSDI work together in some states

Some people on SSDI also receive Medicaid, which is a separate program run by states. Medicaid covers things Medicare does not — dental work, vision care, hearing aids, and long-term nursing home care. Whether you get Medicaid alongside Medicare depends on your state and your income.

In most states, if your income is below a certain threshold (usually around $1,000 to $1,500 per month, depending on the state), you automatically receive Medicaid when you start SSDI. In other states, you have to meet a separate income test for Medicaid. A few states have different rules entirely. Your local Social Security office or your state Medicaid agency can tell you whether you may have access to.

If you have both Medicare and Medicaid, Medicaid is called the "secondary payer" — it covers costs that Medicare does not pay. This combination gives you much broader coverage than Medicare alone.

Prescription drug coverage under Part D

Medicare Part D is prescription drug coverage, and it is optional but strongly recommended. You enroll in a Part D plan through a private insurance company, and the plan covers most prescription medications. There is a monthly premium, which varies by plan and by year.

If you do not enroll in Part D when you first become may be able to access, you may pay a penalty later if you join. The penalty is a percentage of the national average premium, added to your monthly premium for as long as you have Part D coverage. The exception is if you have other creditable drug coverage (such as from a former employer or a union) — in that case, you can enroll later without penalty.

If your income is very low, you may be able to get help paying Part D premiums and out-of-pocket costs through the Low-Income Subsidy program. Your Social Security office or your state Medicaid agency can tell you whether you may have access to.

Supplemental coverage options: Medigap and Medicare Advantage

Medicare does not cover everything. You pay deductibles, coinsurance, and copayments out of your own pocket. To reduce these costs, you can buy supplemental coverage.

Medigap (also called Medicare Supplement Insurance) is a policy sold by private insurance companies that pays some or all of the costs Medicare does not cover — deductibles, coinsurance, and copayments. There are ten standardized Medigap plans, labeled A through N. Each plan covers a different combination of costs. Plan G, for example, covers the Part B deductible and most coinsurance. Plan N covers most costs but leaves you responsible for some copayments. Medigap premiums vary by plan, by insurance company, and by your age and location.

Medicare Advantage (Part C) is an alternative to Original Medicare (Parts A and B). Instead of buying Medicare from the government, you buy a plan from a private insurance company that covers everything Medicare does, usually with lower out-of-pocket costs. However, Medicare Advantage plans often have networks — you may have to use doctors and hospitals in the plan's network, or pay more if you go out of network. Some plans also require prior approval before you see a specialist or have a procedure.

You cannot have both Medigap and Medicare Advantage at the same time. You choose one or the other. If you have Medicaid, you should check with your state before buying Medigap, because some states have rules about which supplemental coverage works best with Medicaid.

How SSDI insurance differs from employer health insurance

If you were working before you became disabled, you may have had employer health insurance. SSDI does not replace that insurance — it is a separate benefit. However, there are programs that help you keep your employer coverage if you need to.

COBRA allows you to stay on your former employer's health plan for up to 18 months after you leave your job, though you pay the full premium yourself (usually much more than you paid as an employee). Medicaid may also help pay for COBRA premiums if your income is low enough.

If you return to work and earn above a certain amount (the "substantial gainful activity" level, which is $1,550 per month in 2024), your SSDI benefits stop, but you may be able to keep Medicare for a period of time. The rules are complex, and it is worth asking your Social Security office about your specific situation before you take a job.

When your Medicare coverage begins and what to expect

Your Medicare coverage begins on the first day of the 25th month of your SSDI may be able to access. You will receive your Medicare card about two weeks before that date. The card will show your Medicare number and the date your coverage starts.

Before your coverage begins, you should choose a primary care doctor and make sure they accept Medicare. You should also decide whether you want to enroll in a Part D prescription drug plan — you have a limited window to enroll without penalty. If you are unsure, you can call 1-800-MEDICARE to ask questions or get help choosing a plan.

After your coverage begins, keep your Medicare card with you at all medical appointments. Show it to your doctor, hospital, pharmacy, and any other provider. If you lose your card, you can request a replacement online or by calling Social Security.

Frequently Asked Questions

Do I have to pay for Medicare if I'm on SSDI?

Part A (hospital insurance) is free. Part B (medical insurance) has a monthly premium, which is usually deducted from your SSDI payment. If your income is very low, Medicaid may pay your Part B premium. Part D (prescription drugs) is optional and has its own premium if you choose it.

What happens to my insurance if I go back to work?

If you earn above the substantial gainful activity level, your SSDI stops, but you can keep Medicare for up to 93 months (about 7.5 years) while you work. You will have to pay the Part B and Part D premiums yourself. This is called Extended Medicare Coverage, and it gives you time to see if work is sustainable before losing insurance.

Can I use my Medicare at any hospital or doctor?

Original Medicare (Parts A and B) works at most hospitals and doctors nationwide. However, some doctors do not accept Medicare, so you should call ahead to confirm. If you have a Medicare Advantage plan, you may be limited to doctors and hospitals in that plan's network.

What if I need dental or vision care?

Original Medicare does not cover dental, vision, or hearing care. If you have Medicaid, it may cover some of these services depending on your state. You can also buy standalone dental and vision plans, or look for community health centers that offer these services on a sliding fee scale based on income.

Do I need to do anything to enroll in Medicare?

No. Medicare enrollment is automatic after 24 months of SSDI. You will receive your card in the mail. However, you should enroll in Part D (prescription drugs) during your initial enrollment period to avoid a penalty later, even if you do not take medications now.