You get Medicare automatically after you have been on SSDI for 24 months

If you receive Social Security Disability Insurance (SSDI), you do not have to explore for Medicare separately. The Social Security Administration enrolls you in both Medicare Part A (hospital insurance) and Medicare Part B (medical insurance) automatically once you have been receiving SSDI payments for 24 consecutive months. This 24-month waiting period starts from the month your SSDI benefits begin, not from the month you filed.

Your Medicare coverage begins on the first day of the 25th month of SSDI. For example, if your SSDI payments started in January 2023, your Medicare would start on January 1, 2025. You will receive your Medicare card in the mail before your coverage begins. You do not need to do anything to trigger this enrollment — it happens automatically through the Social Security system.

The only exception is if you are already enrolled in Medicare through another route (such as being age 65 or older, or having end-stage renal disease). In that case, you straightforward continue with the coverage you already have.

Key Takeaways

  • Medicare Part A and Part B enroll automatically after 24 months on SSDI; you do not need to explore or take any action.
  • Your Medicare coverage begins on the first day of your 25th month receiving SSDI, and you will receive your card by mail before that date.
  • You will owe a monthly premium for Part B unless your income is low enough to may have access to for Medicaid to pay it for you.
  • Many people on SSDI also remain on Medicaid, which covers costs Medicare does not, such as copayments and long-term care.
  • If you work and your SSDI stops, your Medicare continues for at least 93 months after your last SSDI payment, even if you earn too much to receive benefits.

What Medicare Part A and Part B cover for SSDI recipients

Medicare Part A covers inpatient hospital stays, skilled nursing facility care (up to 100 days per benefit period), hospice care, and some home health services. You pay nothing for Part A premiums because you or your spouse paid into Medicare through payroll taxes while working. There is a deductible ($1,676 in 2024, though this amount changes yearly) that you pay when you are admitted to the hospital.

Medicare Part B covers doctor visits, outpatient care, lab tests, X-rays, and some preventive services. Part B has a monthly premium (currently $164.90 per month in 2024 for most people, though higher earners pay more). Social Security deducts the Part B premium directly from your SSDI payment each month. You also pay a yearly deductible ($240 in 2024) and then 20% of the cost of most services after that.

Neither Part A nor Part B covers dental care, vision care, hearing aids, or long-term custodial care in a nursing home. Many people on SSDI stay on Medicaid as well, which fills some of these gaps. If you are on both Medicare and Medicaid, Medicaid can pay your Medicare premiums and cost-sharing, which significantly reduces your out-of-pocket expenses.

How your SSDI payment changes when Medicare starts

When your Medicare Part B coverage begins, Social Security will deduct the monthly premium from your SSDI check. In 2024, this premium is $164.90 per month for most beneficiaries, though the amount changes each year. If you are a higher earner (Modified Adjusted Gross Income above a certain threshold), you will pay a higher premium. Social Security will notify you of the exact amount before your coverage begins.

Your total SSDI payment will be reduced by this amount. For example, if you receive $1,200 per month in SSDI, your payment after Medicare Part B premium deduction would be approximately $1,035. This is automatic — you cannot opt out of Part B once you are enrolled, though you can choose to decline Part B coverage during your initial enrollment period if you have other health insurance (such as employer coverage through a spouse's job).

If your income is low enough, you may be able to stay on Medicaid, and Medicaid can pay your Medicare Part B premium for you. This is called Medicaid Buy-In or may have access to Medicare Beneficiary (QMB) status, depending on your state and income level. Contact your state Medicaid office to find out whether you may have access to.

Medicaid and Medicare together on SSDI

Many people on SSDI remain on Medicaid even after Medicare begins. Medicaid is a separate program run by your state, and the rules for staying on Medicaid after you turn 26 (or after you reach age 18 if you are on SSI instead of SSDI) vary by state. Some states use Medicaid Buy-In programs that let you stay on Medicaid if your income and resources are below a certain level, even after Medicare starts.

Having both Medicare and Medicaid is valuable because Medicaid covers many things Medicare does not: copayments and deductibles, long-term care in a nursing home, dental care, vision care, and hearing aids. When you have both, Medicare is your primary payer (it pays first), and Medicaid is secondary (it pays what Medicare does not cover, up to state limits).

To stay on Medicaid after Medicare begins, you will need to report your Medicare enrollment to your state Medicaid office. Some states do this automatically through data-sharing with Social Security; others require you to report it yourself. Contact your state Medicaid office to confirm what you need to do and whether you still meet the income and resource limits for your state's program.

What happens to Medicare if you return to work

If you work and your SSDI benefits stop because your earnings are too high, your Medicare does not stop when ready. You are may have access to to continue Medicare for at least 93 months (approximately 7.75 years) after your last SSDI payment, even if you are no longer receiving benefits. This is called Medicare continuation and is one of the work incentives built into the SSDI program.

During this 93-month period, you continue to pay the Part B premium (deducted from your paycheck or paid directly to Medicare), and you keep all the same coverage. This gives you time to build work history and income without losing health insurance. After the 93 months end, you can continue Medicare if you pay the full premium yourself, or you may become covered through your employer's health plan if your job offers one.

If you are unsure whether your work will affect your SSDI or Medicare, contact Social Security's Work Incentives Planning and information (WIPA) project. WIPA offers free counseling about how work affects your benefits and Medicare coverage. You can find your local WIPA office at vcu-ntdc.org.

Prescription drug coverage (Part D) and SSDI

Medicare Part D is optional prescription drug coverage. You do not enroll in Part D automatically when you turn 65 or when you start Medicare through SSDI. Instead, you choose whether to enroll during your initial enrollment period (the seven-month window that includes the month Medicare starts and the three months before and after).

If you do not enroll in Part D when you first become may be able to access, you will pay a penalty if you enroll later — a permanent increase to your Part D premium for each month you were without coverage. The penalty is roughly 1% of the national average Part D premium per month. If you have other creditable prescription drug coverage (such as through Medicaid or an employer plan), you do not owe a penalty.

To enroll in Part D, you can visit Medicare.gov, call 1-800-MEDICARE, or visit your local Social Security office. You choose a plan during the annual enrollment period (October 15 to December 7 each year) or during your initial enrollment period when Medicare first starts.

Frequently Asked Questions

Do I have to pay for Medicare Part A when I'm on SSDI?

No. Part A is free because you or your spouse paid into Medicare through payroll taxes while working. You pay a deductible ($1,676 in 2024) only when you are admitted to the hospital, not a monthly premium.

What if I don't want Medicare Part B?

You can decline Part B during your initial enrollment period (the seven months around when Medicare starts) if you have other health insurance, such as coverage through a spouse's employer. If you decline and later want to enroll, you will pay a penalty unless you had creditable coverage. Contact Social Security to decline in writing.

Can I lose Medicare if my SSDI stops?

Not when ready. If your SSDI stops because you work and earn too much, Medicare continues for at least 93 months. After that, you can keep Medicare by paying the full premium yourself, or you may have coverage through your employer.

Will Medicaid pay my Medicare premiums?

It depends on your state and income. Some states have Medicaid Buy-In or may have access to Medicare Beneficiary programs that pay Medicare premiums for people with low income. Contact your state Medicaid office to find out whether you may have access to.

When exactly does my Medicare coverage start?

Medicare begins on the first day of the 25th month you receive SSDI. For example, if SSDI starts in March 2023, Medicare starts March 1, 2025. You will receive your Medicare card by mail before that date.