Yes, but only after you've received SSDI for 24 months

If you receive Social Security Disability Insurance (SSDI), you become covered by Medicare automatically after you have been on SSDI for 24 consecutive months. This is not something you request or explore for separately — Social Security enrolls you in Medicare Part A and Part B without action on your part.

The 24-month waiting period starts the month your SSDI payments begin, not the month you filed. If you were approved retroactively — meaning Social Security paid you for months before your approval letter arrived — those retroactive months count toward the 24-month clock.

This automatic enrollment happens whether you are working, not working, or earning money through a work incentive program. The only exception is if you actively decline Medicare Part B in writing before your enrollment date, which is rare and usually not advisable.

Key Takeaways

  • Medicare Part A and Part B coverage begins automatically 24 months after your SSDI payments start, with no process needed.
  • The 24-month wait includes any retroactive SSDI payments Social Security made before your approval, so your actual coverage date may come sooner than you expect.
  • You pay the standard Medicare Part B premium (currently $164.90 per month for most people in 2024, though this changes yearly) unless your income is low enough to may have access to for Medicaid to cover it.
  • If you are also on Medicaid, Medicaid can pay your Medicare premiums and cost-sharing through a program called Medicaid Buy-In, which varies by state.
  • Declining Medicare Part B is possible but unusual; most people on SSDI benefit from having both programs cover their medical costs.

What happens on your Medicare start date

About three months before your 24-month mark, Social Security mails you a Medicare card. The card shows your Medicare number (which is your Social Security number unless you requested a different one) and your coverage start date. You do not need to do anything with this card — it is proof of coverage.

On your Medicare start date, you are automatically enrolled in Medicare Part A (hospital insurance) and Medicare Part B (medical insurance). Part A covers inpatient hospital stays, skilled nursing facility care, and some home health services. Part B covers doctor visits, outpatient care, and preventive services.

Your Part B premium is deducted from your SSDI payment each month. If your SSDI payment is very small, Social Security may not deduct the full premium and may bill you directly for the difference. If you receive Supplemental Security Income (SSI) in addition to SSDI, Medicaid may cover your Part B premium depending on your state.

How the 24-month clock actually works

The waiting period is 24 consecutive months of SSDI may be able to access, not 24 months of work history or 24 months since you became disabled. This matters because your SSDI may be able to access date is set by Social Security, not by when you filed.

If Social Security approves you and says your may be able to access date was six months before your approval, those six months count. If you were denied once and approved on appeal with an may be able to access date going back to your original filing, that earlier date is what counts. You can find your exact SSDI may be able to access date on your Social Security statement or by calling Social Security at 1-800-772-1213.

Once you know your may be able to access date, add 24 months to find your Medicare start date. Social Security will confirm this date in the letter that comes with your Medicare card.

Medicare premiums and what you pay

Most people on SSDI pay the standard Medicare Part B premium, which is set each year by the federal government. For 2024, the standard premium is $164.90 per month. This amount changes every January and is announced in the fall of the prior year.

If your income is above a certain threshold, you may pay a higher premium under Income-Related Monthly Adjustment Amounts (IRMAA). IRMAA applies if your modified adjusted gross income is above $97,000 (single) or $194,000 (married filing jointly) in 2024. The income limits change yearly. If you are on SSDI alone and have no other income, you will not trigger IRMAA.

You do not pay a premium for Medicare Part A if you or your spouse paid Medicare taxes for at least 10 years (40 quarters). Nearly all people on SSDI meet this requirement because SSDI itself requires a work history. If you do not meet the requirement, Part A costs up to $505 per month in 2024.

Medicare Part A and Part B do not cover everything. You are responsible for deductibles, copayments, and coinsurance. Many people on SSDI also have Medicaid, which covers these out-of-pocket costs.

Medicaid and Medicare working together

If you are on both Medicaid and Medicare, Medicaid is called the secondary payer. This means Medicare pays first for covered services, and Medicaid covers what Medicare does not pay — including your Medicare premiums and cost-sharing.

In most states, if you are on SSDI and your income is low, you are automatically on Medicaid once you turn 65. Before 65, Medicaid coverage depends on your state's rules. Some states cover all SSDI recipients under a program called Section 1619(b). Others cover only those whose SSDI payment is below a certain amount. A few states have stricter rules.

If you are in a state that covers SSDI recipients and your income stays low, Medicaid will pay your Medicare Part B premium automatically. You do not have to do anything. If your income rises — for example, through work or a work incentive program — you may lose Medicaid but keep Medicare, and you will then pay the full Part B premium yourself.

What to do if you think your Medicare start date is wrong

If you receive your Medicare card and the start date does not match what you calculated, or if you believe Social Security made an error in your may be able to access date, contact Social Security directly. Call 1-800-772-1213 (TTY 1-800-325-0778) or visit your local Social Security office with your approval letter and any documents showing your work history.

Do not assume the date on the card is wrong without checking. Social Security has records of your exact may be able to access date, and that is what controls your Medicare start date. If there is a genuine error, Social Security can correct it, but this process takes time — usually several weeks.

If you are already on Medicare and believe you were enrolled incorrectly or too early, you have the right to decline Part B coverage. You must do this in writing within a specific window. However, if you decline and later want Part B back, you may face a permanent premium penalty. For this reason, it is worth confirming your dates are correct before your coverage starts.

How SSDI and Medicare affect work and earnings

Having Medicare does not change the work rules for SSDI. You can continue to work and earn money while on SSDI, subject to the same limits that applied before Medicare started. The Substantial Gainful Activity (SGA) limit in 2024 is $1,550 per month (or $2,590 if you are blind). If you earn more than this, your SSDI can stop.

If you are using a work incentive program like Plan to Achieve Self-Support (PASS) or the Medicaid Buy-In, your Medicare coverage continues regardless of how much you earn, as long as you remain on SSDI. These programs are designed to let you work without losing benefits.

Once you reach full retirement age, your SSDI automatically converts to retirement benefits at the same payment amount. Your Medicare coverage does not change — you keep both Part A and Part B.

Frequently Asked Questions

Can I turn down Medicare Part B when it starts?

Yes, you can decline Part B in writing before your coverage date. However, if you decline and later want to enroll, you will likely pay a permanent 10% premium penalty for each year you were not enrolled. Most people on SSDI should not decline because the cost is low relative to the coverage, especially if Medicaid pays the premium.

What if I'm on SSDI but also working and earning good income?

You keep Medicare Part A and Part B regardless of how much you earn, as long as you remain on SSDI. However, if your earnings exceed the SGA limit, your SSDI payments will stop. Your Medicare continues for a limited time after SSDI ends — usually through the end of the month you stop being may be able to access, plus a grace period. After that, you can buy Medicare as an individual.

Does Medicare start if I'm on SSI instead of SSDI?

No. Medicare is tied to SSDI only. If you receive Supplemental Security Income (SSI) but not SSDI, you do not get Medicare. However, you may be on Medicaid, which is the main health coverage for SSI recipients. Some people receive both SSDI and SSI; in that case, the 24-month clock for Medicare is based on your SSDI may be able to access date.

What if my SSDI was approved retroactively for a year ago?

Your 24-month clock starts from your may be able to access date, not your approval date. If you were approved in 2024 but your may be able to access date was 2023, your Medicare start date is 24 months from 2023. Social Security will tell you the exact date when you receive your Medicare card.

Can Medicaid pay my Medicare premiums if I'm on SSDI?

Yes, if you are on both Medicaid and SSDI and your income is low enough to stay on Medicaid. Medicaid will pay your Part B premium automatically. The income limits and rules vary by state. Contact your state Medicaid office or your local Social Security office to confirm whether you are on Medicaid and whether it is paying your premiums.