Medicare Under 65 on Disability: A Plain-English Guide for NC, SC and TN

If you stopped working because of a disability, Medicare is coming, but usually not right away. The hard parts are the gap before Medicare starts and the choices once your card arrives. This guide walks through the whole path in order, for people in North Carolina, South Carolina and Tennessee and the family members helping them.

Medicare's rules are federal, so they are the same in all three states. Where a state differs, such as Medicaid or Medicare Supplement access, we say so. For more on how we help, see our Medicare page.

When does Medicare start if I'm on disability?

Medicare usually starts in your 25th month of Social Security disability benefits. Because Social Security Disability Insurance (SSDI) has its own 5-month waiting period first, that is roughly two and a half years after your disability began.

SSDI is the monthly benefit Social Security pays to people who can no longer work because of a disability and who have enough work history. Social Security requires a waiting period of 5 full calendar months before SSDI benefits begin. Then Medicare Part A begins with the 25th month you are entitled to disability benefits. Add those together and Medicare starts about 29 to 30 months after your disability began.

The 24 months don't have to be in a row. Months from an earlier period of disability can count if that period ended within the last 60 months (84 months for widow(er) or childhood benefits), or at any time if it is the same or a related condition. The count also includes months on disabled widow(er)'s benefits or childhood disability benefits, not only SSDI on your own work record.

The two big exceptions: ALS and kidney failure

ALS (Lou Gehrig's disease): there is no 5-month SSDI wait and no 24-month Medicare wait. Medicare starts as soon as your disability benefits start.

End-Stage Renal Disease (ESRD), meaning permanent kidney failure that needs dialysis or a transplant: you can qualify at any age, but you must sign up yourself. For in-center dialysis, coverage generally begins with the fourth month of dialysis. It can start sooner if you train for home dialysis or have a transplant. If you also have a job-based group health plan, that plan pays first for a 30-month coordination period. ESRD timing is easy to get wrong, so we would rather talk it through with you.

Do I get Medicare automatically, or do I have to sign up?

If your Medicare is based on SSDI or ALS, Part A and Part B are set up for you automatically. Your Medicare card comes in the mail about 3 months before your coverage starts. Our step-by-step guide covers what to do when your Medicare card arrives, including what to do if it doesn't come. ESRD is the exception: you have to apply through Social Security. Our guide to applying for Medicare on disability walks through each step in order.

"Automatic" covers only Part A (hospital) and Part B (medical). These decisions are still yours:

• Prescription drug coverage. You choose either a stand-alone drug plan (Part D) or a Medicare Advantage plan that includes prescription drug coverage. Drug coverage is its own decision with its own timing.
• Whether to keep Part B. If you keep the card, you keep Part B and pay its premium. To turn it down, you follow the instructions that come with the card and send it back.

Should I turn down Part B?

Usually only if you have other coverage that genuinely replaces it. Whether you can delay Part B without a late-enrollment penalty depends on your specific situation, including whether you have group health coverage based on your own or your spouse's current employment. Employer size can also affect how Medicare coordinates with that coverage, so we check the details before you decide. For people on disability-based Medicare, a group health plan from a large employer (100 or more employees) based on your own or a family member's current job generally pays first.

If you turn Part B down without that kind of coverage, two things can happen. You can generally sign up again only during the General Enrollment Period, January 1 to March 31, with coverage starting the month after you sign up, which can leave you uncovered for months. You can also owe a Part B late-enrollment penalty of 10% for each full 12 months you went without it. A Part B penalty, once it attaches, generally stays with you for as long as you have Part B. It is not a one-time fee. There is one exception that matters here: a penalty that builds up while you are on disability-based Medicare stops when you turn 65.

How do I stay covered while I wait for Medicare?

The usual bridges are COBRA from your old employer, a Marketplace plan, or Medicaid. Which fits depends on your income, health needs and state. Our guide to health insurance until Medicare starts compares COBRA, state continuation and Marketplace options in detail.

This part trips people up: many people assume someone who leaves work on disability "has Medicare." Usually they don't, yet.

COBRA: keep your job-based plan

COBRA lets you keep your employer's group plan, usually for 18 months, by paying the full cost yourself. The disability rule is important here: COBRA can stretch to 29 months if Social Security finds you were disabled at some point during your first 60 days of COBRA and your COBRA came from losing your job or having your hours cut. To get the extension, you must tell the plan within 60 days of Social Security's decision and before your first 18 months run out. The extension covers everyone in your family on the plan. During the extra months, the plan can charge up to 150% of the plan's cost for months that include the disabled person.

Since SSDI's wait plus 24 months is about 29 months, the extension can carry you most or all of the way. But if Medicare starts after you elected COBRA, the plan is allowed to end your COBRA at that point. See our guide to the COBRA disability extension for the deadlines and costs.

A Marketplace plan

Losing job-based coverage, including COBRA ending, opens a Special Enrollment Period to buy a plan through the Health Insurance Marketplace (HealthCare.gov in all three of our states). You can sign up from 60 days before to 60 days after you lose coverage. Your SSDI counts as income when the Marketplace figures your savings. HealthCare.gov counts both taxable and non-taxable Social Security, while SSI does not count. We compare the two routes in more depth in COBRA vs. Marketplace.

When Medicare starts, the Marketplace plan does not end on its own. You have to end it, and you can report your Medicare start date up to 3 months ahead so it ends the day before. Once you have Medicare, you lose any premium tax credits on a Marketplace plan.

Medicaid: this is where the three states differ most

• North Carolina expanded Medicaid on December 1, 2023 for adults 19 to 64 with income up to 138% of the federal poverty level. It can bridge the wait, but it doesn't cover anyone who has Medicare, so it ends when Medicare starts. People on SSDI or SSI are exempt from the work requirements NC begins on January 1, 2027. See whether you qualify for Medicaid in NC.
• South Carolina has not expanded Medicaid. Its disability-related Medicaid groups include Aged, Blind or Disabled coverage up to 100% of the poverty level and a Working Disabled program.
• Tennessee has not expanded Medicaid either. TennCare's coverage for adults with disabilities generally runs through SSI, a few SSI-related groups and long-term care programs, rather than an income-based group like NC's and SC's.

In all three states, people who get SSI (Supplemental Security Income, the needs-based disability benefit) generally get Medicaid automatically.

Who pays for health insurance while I'm on long-term disability?

A long-term disability (LTD) policy replaces part of your pay. It is not health insurance, so don't count on it to cover your health premiums. Whether your employer keeps your health coverage going while you are on leave depends on your employer's plan rules, so ask HR for the plan documents early. Our disability income insurance page explains how income coverage works.

What does Medicare cover when you're under 65?

You get the same Medicare as someone who is 65. Part A covers hospital care, Part B covers doctors and outpatient care, and the costs are the same.

With Medicare based on SSDI, Part A has no monthly premium. In 2026, the standard Part B premium is $202.90 a month, the Part B deductible is $283, and the Part A hospital deductible is $1,736. After the deductible, you usually pay 20% of the cost of each Part B service, and Original Medicare has no yearly limit on what you pay out of pocket. See how the Part B premium works. Medicare has not released the 2027 Part A and Part B amounts yet. For a full breakdown, see how much Medicare costs under 65 on disability.

What are my choices when Medicare starts?

You have up to four paths: Original Medicare with a drug plan, Medicare Advantage, a D-SNP if you also have Medicaid, or Original Medicare with a Medicare Supplement where your state allows it. Neither Advantage nor a Supplement is automatically the right answer.

Your first chance to choose is a 7-month period built around your 25th month of benefits: the 3 months before, the month itself, and the 3 months after. During it you can join a Medicare Advantage plan or a stand-alone drug plan.

• Original Medicare plus a Part D drug plan. You pay the 20% with no yearly cap unless you add a Supplement.
• Medicare Advantage with prescription drug coverage. You can join at any age if you have Part A and Part B. People with ESRD have been able to join since January 1, 2021. Medicare Advantage plans must set a yearly maximum out-of-pocket amount for in-network care, which is one reason people under 65 look closely at these plans. See Medicare Advantage under 65 on disability for costs, timing and what to check.
• A D-SNP (Dual Eligible Special Needs Plan). A type of Medicare Advantage plan for people who have both Medicare and Medicaid. See having both Medicare and Medicaid.
• Original Medicare plus a Medicare Supplement (Medigap) and a drug plan. Under 65, this depends heavily on your state. See the next section.

Base the choice on your actual care: the specialists you see and how often, every prescription checked by name and dose against the options you're considering, equipment and therapy you rely on, how often care needs approval in advance, and whether you travel. We compare the two main paths in Medicare Advantage vs. Medicare Supplement.

Can I get a Medicare Supplement under 65 in NC, SC or Tennessee?

It depends on your state, because federal law doesn't require companies to sell Medigap to people under 65. North Carolina has a guarantee, South Carolina largely does not, and Tennessee's guarantee is the broadest of the three.

Medigap plans are standardized by letter, so the basic benefits for a given plan letter are the same from one insurer to the next. Premiums, underwriting, discounts and company service can still differ.

In every state, a full Medigap Open Enrollment Period opens at 65 (more on that below), so a choice you make now is not your last chance. For more on each state's rules, see Medicare Supplements under 65 on disability.

Can I get help paying for Medicare on disability?

Yes. Extra Help lowers prescription drug costs, Medicare Savings Programs can pay your Part B premium, and some people qualify for full Medicaid on top of Medicare.

• Extra Help (the Low-Income Subsidy) lowers Part D premiums, deductibles and copays. In 2026 the limits are $23,940 in yearly income and $18,090 in resources for one person. You get it automatically if you have full Medicaid, a Medicare Savings Program or SSI.
• Medicare Savings Programs (QMB, SLMB and QI) are run by each state and pay the Part B premium. QMB also covers Medicare deductibles and coinsurance. In both NC and SC, the 2026 monthly income limits for one person are $1,330 (QMB), $1,596 (SLMB) and $1,796 (QI), with a $9,950 resource limit. Tennessee uses the same 2026 limits.
• Full Medicaid alongside Medicare makes you "dual eligible." In NC, full Medicaid for people with disabilities generally goes up to 100% of the poverty level ($1,330 a month for one person in 2026). In SC, the Aged, Blind or Disabled group uses the same 100% level.

Since January 1, 2025, people with Medicaid or Extra Help can make a change once a month to move to Original Medicare with a drug plan, or switch drug plans. Integrated D-SNPs bring more of your Medicare and Medicaid benefits under one plan. CMS's 2026 list shows four of these in South Carolina, none in North Carolina, and six in Tennessee, all fully integrated with TennCare. TennCare says that by January 2027, people with full TennCare who want a D-SNP must get their Medicare and TennCare benefits from the same plan. For a full walk-through, see help paying for Medicare.

What changes when I turn 65?

Turning 65 gives you a genuine fresh start: a new enrollment window, penalties from the disability years cleared, and your first guaranteed chance at a Medicare Supplement in many cases.

• A new 7-month window around your 65th birthday to join, switch or drop a Medicare Advantage or drug plan.
• A Part B penalty from your disability years stops once you reach 65.
• A Part D penalty from your disability years ends too. It stops the day before your age-65 window begins, and the count starts over. Keep drug coverage in place after that so a new one doesn't start.
• Your Medigap Open Enrollment Period is the 6 months starting the first month you are 65 and enrolled in Part B. During it, an insurer can't turn you down or charge you more because of your health. This applies even if you've had Part B for years.
• Your SSDI does not end at 65. It changes to retirement benefits at full retirement age (66 to 67), and your Medicare simply continues.

For a month-by-month plan, see what changes when you turn 65 on disability Medicare.

Can I work while I'm on SSDI and keep Medicare?

Often, yes. Social Security's work rules let you test working without losing Medicare right away.

In 2026, any month you earn more than $1,210 counts toward a 9-month Trial Work Period. After it ends, Medicare can continue for at least 93 months, with Part A still at no premium. Part B and Part D premiums still apply. If you go back to work with a large employer's group plan, that plan generally pays first and Medicare second.

How are the rules different in North Carolina, South Carolina and Tennessee?

Medicare itself is the same everywhere. The differences are in Medicaid, Medicare Supplement access and some local programs.

Mistakes we see people make

• Assuming Medicare starts as soon as SSDI is approved. For most people, there are about two more years to cover.
• Letting COBRA lapse too early, or missing the deadline to ask for the 29-month disability extension.
• Assuming the long-term disability insurer pays for health coverage. It replaces income. It isn't a health plan.
• Sending back the Part B card without other qualifying coverage, then facing a penalty and a gap.
• Forgetting to end a Marketplace plan when Medicare starts. It doesn't end on its own, and once you have Medicare you lose the premium tax credits on it.
• Skipping the review at 65, when the Medigap window and penalty reset make it the best time to re-shop.

What to have ready before you talk to us

• Your Social Security award letter, with your disability onset and entitlement dates
• Your Medicare card, if it has arrived
• Your current coverage (employer plan, COBRA, Marketplace or Medicaid) and the date it ends
• Your doctors and specialists, by name
• Every prescription, with the dose, and the pharmacy you use
• Whether you have Medicaid, Extra Help or a Medicare Savings Program, or have applied
• Who else is helping you, such as a spouse or adult child, so they can join the call

How The Jordan Insurance Agency helps

The Jordan Insurance Agency is an independent agency based in Charlotte. You work with a licensed agent who stays with you over time, so you are not repeating your story to someone new each year. We can meet by phone, by video, or in person at our office at 3540 Toringdon Way, Suite 200, Charlotte, NC 28277, Monday through Friday, 9 to 5 Eastern. There is no cost to you to work with us.

Many people in your situation come to us while waiting for Medicare, when the card arrives, or as 65 approaches. We'll map your dates, check your doctors and prescriptions, and explain your options in plain English. Call (704) 926-7565 or use the button below to schedule a Medicare review. If you'd like to read more first, start with how to choose a Medicare agent or browse our Medicare questions answered.

Frequently asked questions

Does the 24-month wait for Medicare start when I apply for SSDI?

No. It starts with your first month of entitlement to SSDI benefits, which comes after the 5-month waiting period. Your award letter shows the date. Months on an earlier period of SSDI can sometimes count toward the 24.

Can I get Medicare on SSI alone?

SSI by itself doesn't make you eligible for Medicare, because Medicare on disability is tied to Social Security disability benefits from a work record. SSI generally comes with Medicaid instead. That's true in NC, SC and Tennessee.

Will my Medicare card come automatically if I have ALS?

Yes. With ALS, Medicare starts as soon as your Social Security disability benefits start, with no 24-month wait, and Parts A and B are set up for you.

Can someone under 65 on disability get a Medicare Advantage plan with drug coverage?

Yes. Anyone with Part A and Part B can join a Medicare Advantage plan offered where they live, at any age. That includes people with ESRD since 2021.

Does a Part B penalty from my disability years follow me after 65?

No. A Part B penalty that built up while you were on disability-based Medicare stops once you reach 65, and a Part D penalty from those years ends when your age-65 window begins.

Reviewed and approved by Billy Jordan, Jr., licensed agent and President of The Jordan Insurance Agency.

Last reviewed: October 2026