Yes, but only after you have been on SSDI for 24 months

If you receive Social Security Disability Insurance (SSDI), you become covered by Medicare Part A and Part B automatically after you have been receiving SSDI payments for 24 consecutive months. You do not have to do anything to enroll — Medicare coverage starts on the first day of the 25th month of your SSDI payments.

This is different from how Medicare normally works. Most people become covered at age 65 or because they have paid Medicare taxes for a certain number of years. SSDI recipients get Medicare earlier because the law treats the 24-month waiting period as the equivalent of having earned that coverage through work history.

The 24 months are counted from the month your SSDI payments actually begin, not from the month you applied or were approved. If your first payment arrived in March, your Medicare coverage begins in March of the second year.

Key Takeaways

  • Medicare Part A and Part B start automatically after 24 months of SSDI payments; you do not need to enroll separately.
  • The 24-month clock starts from your first SSDI payment month, not your approval date.
  • You will receive a Medicare card in the mail about two months before your coverage begins.
  • If you work and your SSDI payments stop, your Medicare coverage continues for at least 93 more months (the extended coverage period).
  • You can enroll in Medicare Part D (prescription drug coverage) or a Medigap plan during your initial enrollment window.

What happens when your 24 months are almost up

About two months before your Medicare coverage begins, the Social Security Administration will mail you a Medicare card to the address on file. The card shows your Medicare number, which is usually your Social Security number followed by a letter. Keep this card safe — you will need it to show doctors and hospitals that you have coverage.

You do not have to do anything when the card arrives. Your coverage is already active on the date shown. If you do not receive a card by the time your coverage should start, call Social Security at 1-800-772-1213 to confirm your address is correct.

If you are already enrolled in a Medicare Advantage plan (Part C) or have chosen a Medigap supplemental plan before your Part A and Part B begin, those plans will coordinate with your new coverage automatically. If you have not chosen a plan yet, you have a window of time after your Part A and Part B start to enroll without a penalty.

What Medicare Part A and Part B cover

Part A covers hospital stays, skilled nursing facility care (up to 100 days per benefit period), hospice, and some home health services. You pay nothing for Part A — it is fully covered. There is a deductible per hospital stay, but SSDI recipients do not pay a monthly premium.

Part B covers doctor visits, outpatient care, lab tests, X-rays, and some medical equipment and supplies. Part B has a monthly premium (the amount changes each year), and you pay 20 percent of the cost after you meet your annual deductible. Most SSDI recipients have their Part B premium deducted directly from their SSDI payment.

Neither Part A nor Part B covers prescription drugs, dental care, vision care, or hearing aids. You can add Part D (prescription drug coverage) through a separate plan, and you can purchase a Medigap supplemental plan to cover some of the costs that Medicare does not pay.

What happens if you return to work and your SSDI stops

If you work and your SSDI payments end, your Medicare coverage does not end when ready. You are covered for an additional 93 months (about 7.75 years) after your SSDI payments stop, as long as you do not have other health insurance that would make you ineligible. This is called the extended coverage period.

During the extended coverage period, you pay the standard Part B premium (deducted from any remaining SSDI payment, or billed directly to you). Part A remains free. After the 93 months end, you can continue Medicare coverage by paying the full premium yourself, or you may be covered through an employer if you are working.

You do not have to do anything to stay on Medicare during the extended period — your coverage continues automatically. However, if you have questions about whether you still may have access to, contact Social Security to confirm your status.

Coordinating SSDI with other health insurance

If you have health insurance through a current or former employer, Medicaid, or another source before your Medicare coverage begins, that insurance remains your primary coverage until Medicare starts. After Medicare begins, the coordination depends on what other coverage you have.

If you are also covered by Medicaid (because your SSDI income is low), Medicaid becomes your secondary payer after Medicare starts. This means Medicare pays first, and Medicaid covers some costs that Medicare does not. You keep both coverages — you do not have to choose one.

If you have employer coverage and are still working, your employer plan is usually primary and Medicare is secondary. Tell your employer's benefits office that you now have Medicare so they can coordinate correctly. Do not drop employer coverage just because you have Medicare — employer coverage often pays more than Medicare alone.

Enrolling in Part D and Medigap plans

When your Medicare Part A and Part B begin, you have a 63-day initial enrollment window to sign up for Part D (prescription drug coverage) without a late enrollment penalty. If you miss this window, you may pay a penalty for every month you go without Part D coverage, even if you enroll later.

You can enroll in Part D through Medicare.gov, by phone at 1-800-MEDICARE, or through an insurance agent. You choose a plan based on the medications you take — different plans cover different drugs at different costs. Compare plans each year during the annual enrollment period (October 15 to December 7) because coverage and costs change.

Medigap plans (also called Supplement plans) help pay the costs that Medicare does not cover, such as deductibles and coinsurance. You can enroll in a Medigap plan anytime, but enrolling during your initial Medicare enrollment window may give you better rates and fewer restrictions. Medigap plans are sold by private insurance companies, not by Medicare.

Frequently Asked Questions

Do I have to pay for Medicare when I am on SSDI?

Part A is free. Part B has a monthly premium that is usually deducted from your SSDI payment. The premium amount changes each year. If your SSDI payment is very small, you may may have access to for help paying the Part B premium through a state program.

What if I am under 65 and on SSDI — do I get Medicare at a different age?

No. Your age does not matter. If you are on SSDI, you get Medicare after 24 months of payments, regardless of whether you are 30 or 64. Once you turn 65, your SSDI automatically converts to regular Social Security retirement benefits, but your Medicare coverage continues without interruption.

Can I enroll in a Medicare Advantage plan instead of staying on Original Medicare?

Yes. Medicare Advantage (Part C) is an alternative to Original Medicare (Part A and Part B). You can enroll in a Medicare Advantage plan during your initial enrollment window or during the annual enrollment period. Some plans have lower premiums but require you to use doctors in their network.

What happens to my Medicare if I move to a different state?

Your Medicare coverage stays the same no matter where you live in the United States. However, if you have a Medicare Advantage plan or Medigap plan, you may need to switch plans because not all plans are available in every state. Contact your plan or call 1-800-MEDICARE to find plans available in your new state.

Do I lose Medicare if I go back on SSDI after working?

If you return to SSDI after your extended coverage period ends, you must wait another 24 months from your new SSDI start date to get Medicare again. However, if you are still within the 93-month extended coverage period, your Medicare continues without interruption.