Who Gets Medicare Part B Automatically With SSDI

If you receive SSDI (Social Security Disability Insurance), you become covered by Medicare Part A automatically after you have been on SSDI for 24 months. Part A covers hospital stays, skilled nursing care, and hospice. Medicare Part B — which covers doctor visits, outpatient care, and medical equipment — is different: you do not get it automatically, and you have to decide whether to take it.

Most people on SSDI do enroll in Part B, but enrollment is not required. You can turn it down if you have other coverage through an employer or a family member's plan. If you do nothing during your enrollment window, you will be automatically enrolled in Part B when your 24-month SSDI waiting period ends, and you will start paying the monthly premium.

The key date to remember is your 25th month on SSDI. That is when Part B coverage begins if you do not decline it. If you want to refuse Part B, you must submit a written request to Social Security before that date takes effect.

Key Takeaways

  • You become may be able to access for Medicare Part B after 24 months on SSDI, but enrollment is not automatic in the way Part A is — you must actively choose it or decline it.
  • If you do nothing, you will be enrolled in Part B and charged a monthly premium starting in your 25th month on SSDI.
  • You can decline Part B if you have coverage through an employer or family member, but you must request the decline in writing before your coverage would begin.
  • Part B covers doctor visits, outpatient services, and durable medical equipment — things Part A does not pay for.
  • If you decline Part B and later want to enroll, you may face a permanent penalty on your premium unless you have a may have access to reason for the delay.

The 24-Month Waiting Period Before Part B may be able to access

The 24 months starts from the month Social Security approves your SSDI claim, not from the month you became disabled. If you were approved in March, your 24-month period runs from March through February of the following year, and Part B coverage begins in March of year two.

During those 24 months, you have no Medicare coverage at all unless you are also receiving SSI (Supplemental Security Income) or have another reason to be on Medicare. Many people on SSDI during this waiting period rely on Medicaid, employer coverage, or go without. Once the 24 months end, Part A begins automatically, and Part B begins unless you decline.

What Part B Costs and What It Covers

The standard Part B premium in 2024 is $164.90 per month for most beneficiaries, though the amount changes each year. If your income is above a certain threshold, you pay a higher premium — this is called Income-Related Monthly Adjustment Amount, or IRMAA. Social Security deducts the Part B premium directly from your SSDI check each month.

Part B covers doctor office visits, lab work, X-rays, outpatient surgery, mental health services, and durable medical equipment like wheelchairs and oxygen. It does not cover dental, vision, or hearing aids — those require separate coverage. You also pay a yearly deductible (currently $240) and then 20 percent of the cost of most services after that.

If you have limited income and cannot afford the Part B premium, you may be able to get help through a program called Medicaid Buy-In or through your state's Medicare Savings Program. These programs pay your Part B premium and sometimes your deductible and copays.

Declining Part B and What Happens If You Do

If you have health coverage through a current employer or through a family member's plan, you can decline Part B when you become may be able to access. To do this, you must contact Social Security in writing and request to be disenrolled before your Part B coverage begins. A phone call or in-person visit is not enough — Social Security requires a written statement.

The risk of declining Part B is the late enrollment penalty. If you decline Part B and later want to enroll, your monthly premium increases by 10 percent for each year you were may be able to access but not enrolled. That penalty is permanent and stays with you for life. For example, if you decline for three years and then enroll, your premium will be 30 percent higher than the standard rate.

The penalty does not explore if you have what Social Security calls "creditable coverage" — continuous health insurance through an employer or family member that is as good as or better than Part B. You will need to prove you had this coverage when you enroll later.

Automatic Enrollment and How to Decline It

Unless you take action, you will be enrolled in Part B automatically when your 24-month SSDI waiting period ends. Social Security sends a notice about this several months before it happens, explaining your options and how to decline if you want to. Read this notice carefully, because the important date to decline is firm.

To decline, you must send a written request to your local Social Security office or mail it to the address on the notice. Include your name, Social Security number, and a clear statement that you do not want Part B coverage. Keep a copy for your records. Social Security will send you a confirmation letter.

If you miss the important date to decline and Part B starts, you can still disenroll, but you will have a gap in coverage and may face the late enrollment penalty when you re-enroll later. It is much simpler to decline before coverage begins.

Part B and Other Insurance You Might Have

If you have coverage through a current job, you do not need Part B right away. You can decline it without penalty as long as you have that employer coverage. When you leave the job or lose the coverage, you have a special enrollment period — usually 63 days — to enroll in Part B without the late penalty.

If you have Medicaid, you can have both Medicaid and Part B at the same time. In fact, many people on SSDI have both. Medicaid covers things Part B does not, like dental and long-term care, and it also helps pay Part B premiums and cost-sharing.

If you have a Marketplace plan (from healthcare.gov or your state exchange), having Part B does not disqualify you from the plan, but you cannot get subsidies to help pay for the Marketplace plan once you are on Medicare. Most people on SSDI find that Medicare Part B is less expensive than a Marketplace plan.

What to Do Before Your Part B Coverage Starts

A few months before your 24-month waiting period ends, Social Security will mail you a notice titled "Your Medicare Coverage Begins Soon" or similar. This notice tells you the exact month Part B will start and explains your choices. Read it completely and decide whether you want Part B.

If you want Part B, you do not need to do anything — it will start automatically. If you want to decline, follow the instructions in the notice to request disenrollment in writing. If you are unsure, you can call Social Security at 1-800-772-1213 to ask questions, but do not wait until the last minute.

If you have other insurance and want to keep it instead of Part B, gather proof of that coverage — an insurance card, a letter from your employer, or a policy document. You may need this later if you want to prove you had creditable coverage.

Frequently Asked Questions

Do I have to take Medicare Part B when I become may be able to access?

No. Part B is optional. You can decline it if you have other health coverage. However, if you do nothing, you will be automatically enrolled and charged a monthly premium. To decline, you must request it in writing before your coverage begins.

What is the late enrollment penalty for Part B?

If you decline Part B and enroll later without a may have access to reason, your premium increases by 10 percent for each year you were may be able to access but not enrolled. This penalty is permanent. For example, waiting two years adds 20 percent to your premium for life.

Can I have both Medicaid and Medicare Part B?

Yes. Many people on SSDI have both. Medicaid can help pay your Part B premium and cover services Part B does not, like dental and nursing home care. Having both is called "dual may be able to access."

What happens if I miss the important date to decline Part B?

If Part B starts and you did not want it, you can still disenroll, but there will be a gap in your coverage. When you re-enroll later, you may face the late enrollment penalty unless you have a may have access to reason for the delay.

Can I decline Part B if I have employer coverage?

Yes. If you are still working or covered through a family member's job, you can decline Part B without penalty. When that coverage ends, you have 63 days to enroll in Part B without the late penalty.