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 automatically in Medicare Part A (hospital insurance) and Medicare Part B (medical insurance) once you have been receiving SSDI payments for 24 consecutive months. This automatic enrollment happens whether you are 65 or younger — age does not matter for SSDI recipients.

The 24-month waiting period starts from the month you first become may have access to to SSDI benefits, not from the month you explore. If Social Security approves your claim retroactively — meaning they find you became disabled before the month you filed — the 24 months counts backward from that earlier date. You will receive a notice in the mail about two months before your Medicare coverage begins, showing your effective date and your Medicare number.

You are enrolled in both Part A and Part B unless you actively decline Part B coverage. Most people keep both, but if you are still working and have employer health insurance, you can refuse Part B to avoid paying the monthly premium. You can change this choice later during the annual enrollment period (October 15 to December 7) without penalty, as long as you enroll within eight months of losing your employer coverage.

Key Takeaways

  • Medicare Part A and Part B begin automatically 24 months after your SSDI benefits start, with no process needed.
  • The 24-month clock starts from your entitlement date, which may be earlier than the month you filed if your claim was approved retroactively.
  • You will receive a notice two months before coverage begins, showing your Medicare number and effective date.
  • Part B has a monthly premium that is deducted from your SSDI check, but you can decline it if you have other health insurance.
  • If you refuse Part B now and want it later, you can enroll during the annual open enrollment period without a penalty.

What happens during the 24-month waiting period

During the first 24 months of SSDI, you are not covered by Medicare. You may be covered by Medicaid instead, depending on your state and income. Medicaid is a separate program run by states, and rules vary widely — some states cover all SSDI recipients automatically, while others have income or asset limits that may disqualify you even though you receive SSDI.

If you do not may have access to for Medicaid and cannot afford private insurance, you can purchase a plan through the Health Insurance Marketplace at healthcare.gov. You may be able to lower your monthly premium through tax credits if your income is low enough. Some states also run high-risk pools or other programs for people without coverage; your state health department website lists what is available where you live.

Once your Medicare coverage begins at month 25, Medicaid coverage usually ends in most states — though a few states continue Medicaid alongside Medicare for people with low income. Check with your state Medicaid office to understand what happens to your coverage when Medicare starts.

How Medicare premiums and costs work with SSDI

The Part B premium is deducted automatically from your SSDI payment each month. For 2024, the standard Part B premium is $164.90 per month, though the amount changes each year and may be higher if you have higher income. You also pay a Part A deductible ($1,632 in 2024) if you are hospitalized, and Part B cost-sharing — a $240 annual deductible plus 20% of most services after that.

Many SSDI recipients have low income and may be covered by Medicaid at the same time as Medicare. When you have both programs, Medicaid often pays your Part B premium and cost-sharing, which means you pay little or nothing out of pocket. This is called "dual may be able to access" status. To learn about you may have access to, contact your state Medicaid office — may be able to access rules differ by state.

If you cannot afford Part B premiums and do not may have access to for Medicaid, you may be able to get help through the Medicare Savings Program, which is run by your state. This program pays Part B premiums and sometimes cost-sharing for people with income below certain thresholds. Your state Medicaid office can tell you whether you meet the income and asset limits.

What Medicare does and does not cover

Part A covers hospital stays, skilled nursing facility care (up to 100 days per benefit period), some home health services, and hospice. Part B covers doctor visits, outpatient services, lab tests, imaging, and some preventive care. Neither part covers dental, vision, hearing aids, or long-term custodial care in a nursing home.

If you want coverage for services Medicare does not pay for, you can purchase a Medigap policy (supplemental insurance) or enroll in a Medicare Advantage plan (Part C), which is an alternative to Original Medicare run by private insurers. Medicare Advantage plans often include dental and vision coverage, but they have different networks and rules than Original Medicare. You can switch between Original Medicare and Medicare Advantage during the annual enrollment period.

Many SSDI recipients also need prescription drug coverage. Part D (prescription drug insurance) is optional and sold by private insurers approved by Medicare. You enroll in Part D separately during the annual enrollment period. If you do not enroll when you first become Medicare-may be able to access and do not have other creditable drug coverage, you will pay a penalty if you enroll later.

How SSDI and Medicare interact with work incentives

If you work while receiving SSDI, your earnings do not affect your Medicare coverage. Once you have been on SSDI for 24 months and Medicare begins, you keep Medicare even if your work earnings eventually cause your SSDI payments to stop. This is called Medicare Continuation, and it lasts for up to 93 months (about 7.75 years) after your SSDI benefits end.

During the Medicare Continuation period, you must pay the Part B premium yourself — it is no longer deducted from an SSDI check. The premium amount depends on your income from the previous two years. If you cannot afford the premium, you may still may have access to for the Medicare Savings Program or Medicaid, depending on your state and current income.

If you are using a work incentive like the Plan to Achieve Self-Support (PASS) or Impairment Related Work Expenses (IRWE), these reduce your countable income for SSDI purposes but do not affect your Medicare coverage or premiums. Work incentives are tools to help you keep more of your earnings while staying on SSDI; they do not change how Medicare works.

When Medicare coverage begins and what to expect

Your Medicare coverage begins on the first day of the 25th month of your SSDI entitlement. Social Security sends you a notice about two months before that date, along with your Medicare card. The card shows your Medicare number, which is usually your Social Security number followed by a letter (A, B, C, or D).

When you receive your card, check it for errors — if your name, date of birth, or sex is wrong, contact Social Security or Medicare to correct it. You do not need to do anything else to set up your coverage; it starts automatically on the date shown in your notice.

If you do not receive a notice or your card does not arrive, contact Social Security at 1-800-772-1213 (TTY 1-800-325-0778) or visit your local Social Security office. You can also create an account at ssa.gov to check your SSDI status and see when Medicare will begin.

Declining Part B and changing your mind later

You can refuse Part B coverage when you first become Medicare-may be able to access by returning a form to Social Security. This is useful if you have employer health insurance and do not need Medicare yet. However, if you decline Part B and later want to enroll, you can do so during the annual open enrollment period (October 15 to December 7) without paying a penalty, as long as you enroll within eight months of losing your other coverage.

If you enroll in Part B outside the annual enrollment period and more than eight months after losing other coverage, you will pay a late enrollment penalty — an extra 10% of the Part B premium for each year you were may be able to access but did not enroll. This penalty is permanent and added to your premium for life, so it is important to enroll during the correct window if you change your mind.

To decline Part B or to enroll during open enrollment, contact Social Security or visit Medicare.gov. You can also call 1-800-MEDICARE (1-800-633-4227) for help with enrollment questions.

Frequently Asked Questions

What if I am already on Medicare before my 24-month SSDI waiting period ends?

If you are 65 or older and already enrolled in Medicare through regular retirement benefits or because you turned 65, you do not need to do anything when your SSDI waiting period ends. Your Medicare coverage continues without interruption. If you are under 65 and on Medicare for another reason (such as end-stage renal disease), your coverage also continues.

Do I have to pay back Medicare premiums if my SSDI claim is denied on appeal?

If your SSDI claim is denied after you have been receiving benefits and paying Medicare premiums, you will owe back premiums for the months you were not actually may have access to to SSDI. Social Security will work out the amount owed and may deduct it from any back pay you receive. Contact Social Security to understand what you owe if your case changes.

Can I keep Medicaid after Medicare starts?

Yes, in most states you can have both Medicare and Medicaid at the same time if your income and assets are low enough. Medicaid will pay your Medicare premiums and cost-sharing. Rules vary by state, so contact your state Medicaid office to confirm whether you remain covered after Medicare begins.

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

Your Medicare coverage follows you — it is federal and works the same in every state. However, your Medicaid coverage may change because each state has different rules. Contact your new state's Medicaid office to learn about you still may have access to and what your coverage will be.

Do I need to enroll in Part D prescription drug coverage, or does it happen automatically?

Part D is not automatic. You must enroll during the annual enrollment period (October 15 to December 7) or when you first become Medicare-may be able to access. If you do not enroll and do not have other creditable drug coverage, you will pay a penalty when you do enroll. Talk to your doctor about whether you need Part D coverage based on the medications you take.