SSDI includes Medicare, not Medicaid—and that distinction matters for your costs

Social Security Disability Insurance (SSDI) automatically enrolls you in Medicare after you have been receiving benefits for 24 months. This is not Medicaid, which is a separate program run by states. Medicare is a federal health insurance program that covers hospital stays, doctor visits, and some prescription drugs. You do not choose whether to enroll—it happens automatically once you hit the 24-month mark.

The 24-month waiting period is a fixed rule. It does not matter how old you are, what your disability is, or how much you earn. Two years after your first SSDI payment arrives, Medicare Part A (hospital insurance) and Part B (medical insurance) begin. You will receive a Medicare card in the mail before your coverage starts.

Many people on SSDI also remain on Medicaid during those first 24 months and sometimes after, depending on their state and income. Medicaid and Medicare can work together—you can have both at the same time. But they are run by different agencies and have different rules, so understanding which one covers what is important for managing your healthcare costs.

Key Takeaways

  • Medicare Part A and Part B start automatically 24 months after your first SSDI payment, with no action required on your part.
  • You will owe monthly premiums for Medicare Part B (currently around $165 to $560 per month depending on income), which are usually deducted from your SSDI check.
  • Medicaid, a separate program run by your state, may cover you during the first 24 months and can continue alongside Medicare if your income is low enough.
  • Medicare has deductibles, copayments, and coverage gaps that Medicaid can help fill, so having both programs is common for people on SSDI.

How Medicare Part A and Part B work once you are enrolled

Medicare Part A covers inpatient hospital care, skilled nursing facility stays, hospice, and some home health services. There is no monthly premium for Part A—you have already paid for it through payroll taxes during your working years. However, you do pay a deductible when you are admitted to the hospital, and the amount changes each year.

Medicare Part B covers doctor visits, outpatient services, lab tests, imaging, and some preventive care. Part B requires a monthly premium that is deducted directly from your SSDI payment. The premium amount depends on your income from the previous two years. If your income is higher, you pay more. Most people on SSDI pay the standard premium, but some pay extra.

Neither Part A nor Part B covers dental, vision, or hearing aids. They also do not cover long-term custodial care in a nursing home. Many people on SSDI purchase supplemental insurance (called Medigap) or enroll in Medicare Advantage plans to cover these gaps, though these have their own costs and rules.

What happens during the first 24 months before Medicare starts

During the waiting period, you may be covered by Medicaid if you live in a state that covers people on SSDI and your income is low enough. Medicaid rules vary by state—some states are more generous than others. In some states, being approved for SSDI automatically qualifies you for Medicaid. In others, you must explore separately and meet additional income or resource limits.

If you are not covered by Medicaid and do not have other health insurance, you can purchase coverage through the Affordable Care Act (ACA) marketplace. You may be may be able to access for subsidies that lower your monthly premium if your income is low. You can also remain uninsured, though you may owe a penalty when you file taxes in some circumstances.

Some people work part-time while on SSDI and keep employer health insurance. If that is your situation, you can keep that coverage through the 24-month waiting period and beyond, even after Medicare starts. Having both employer insurance and Medicare is allowed.

Medicaid and Medicare working together

When you have both Medicaid and Medicare, Medicaid is called the "secondary payer." This means Medicare pays first for covered services, and Medicaid covers costs that Medicare does not—like copayments, deductibles, and services Medicare does not cover at all. For many people on SSDI with low income, this combination significantly reduces out-of-pocket costs.

To keep Medicaid after Medicare starts, your income must stay below your state's limit. Each state sets its own threshold. Some states allow people on SSDI to keep Medicaid indefinitely as long as they remain on SSDI, while others have stricter income caps. Contact your state Medicaid office or your local Social Security office to learn your state's rules.

If you lose Medicaid because your income rises above the limit, you may be able to purchase a Medigap policy to cover Medicare's gaps. Medigap policies have monthly premiums and cover deductibles and copayments. The cost varies by age, location, and the plan you choose.

Medicare Part D and prescription drug coverage

Medicare Part D is optional prescription drug coverage that you can enroll in when Medicare starts. It is not automatic—you must choose a plan. Part D has a monthly premium, an annual deductible, and copayments for each prescription. If you do not enroll when you first become may be able to access and later decide you want it, you may owe a penalty for every month you went without coverage.

If you are also on Medicaid, Medicaid usually covers your prescriptions instead of Part D, so you would not need to enroll in Part D separately. However, if you lose Medicaid later, you can enroll in Part D at that time without penalty.

Some people on SSDI with very low income may have access to for Extra Help, a federal program that pays Part D premiums and reduces copayments. You can explore for Extra Help through Social Security or Medicare. It is separate from Medicaid but works alongside it.

What you need to do to prepare for Medicare enrollment

You do not need to do anything to enroll in Medicare Part A and Part B—Social Security handles this automatically. However, you should review your Medicare card when it arrives to make sure the information is correct. If you notice errors, contact Medicare at 1-800-MEDICARE.

If you want Part D prescription drug coverage, you will need to choose a plan during your enrollment period. Medicare sends information about available plans a few weeks before your coverage starts. You can compare plans on Medicare.gov or call 1-800-MEDICARE for help.

If you think you might be may be able to access for Medicaid in your state, explore through your state Medicaid office before your Medicare starts. Do not wait until after the 24 months have passed. Some states have waiting lists or processing delays, so explore early gives you the best chance of continuous coverage.

Costs you will pay once Medicare begins

Your Medicare Part B premium will be deducted from your SSDI check each month. The amount depends on your income from two years prior. For 2024, the standard premium is around $165 per month, but higher earners pay more. Your Social Security office can tell you what your specific premium will be.

You will also pay deductibles and copayments for services. Medicare Part A has a hospital deductible (around $1,600 in 2024, though this changes yearly). Medicare Part B has an annual deductible (around $240 in 2024) and then you typically pay 20 percent of the cost of covered services after that.

If you enroll in Part D, you pay a monthly premium for the plan you choose, plus an annual deductible and copayments per prescription. If you have Medicaid alongside Medicare, Medicaid covers many of these costs, which is why having both programs is valuable for people with low income.

Frequently Asked Questions

Can I get health insurance before the 24-month Medicare waiting period ends?

Yes. You can explore for Medicaid through your state if your income qualifies. You can also purchase coverage through the ACA marketplace, where you may receive subsidies based on your SSDI income. If you work and have employer insurance, you can keep that coverage as well.

What if I do not want Medicare Part B?

You can decline Part B when it is offered, but if you change your mind later, you may owe a penalty for each month you were without it. The penalty is a permanent 10 percent increase to your premium for each year you delayed. It is usually better to enroll even if you do not think you will use it.

Does Medicare cover dental, vision, or hearing aids?

No. Original Medicare does not cover routine dental, vision, or hearing services. Some Medicare Advantage plans include these benefits, but they have different costs and networks. You can also purchase standalone dental or vision insurance, though these are not free.

Will my SSDI check be reduced because of Medicare premiums?

Your SSDI payment amount does not change, but your Medicare Part B premium is deducted from it before you receive the check. So your take-home amount will be lower once Medicare starts. Your Social Security office can estimate what your net payment will be.

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

If you earn above the substantial gainful activity limit, your SSDI benefits will eventually stop, and so will Medicare. However, you have a grace period and work incentives that allow you to test work without when ready losing benefits. Contact your local Social Security office to learn about work incentives before you start working.