Medicare Before 65: Who Qualifies and When Coverage Starts

1Why there is a wait

Medicare is built around age, and disability is the exception Congress added later, with a condition attached: you must have been entitled to disability benefits for 24 months first. The clock starts with the first month you are entitled to Social Security Disability Insurance, not on the date you stopped working or applied. Because SSDI itself has a five-month waiting period, the total from the start of the disability is about 29 months.

Months of back pay count. If your claim took a long time to approve and Social Security pays you for earlier months, those months of entitlement count toward the 24, so some people get Medicare soon after they are approved. Our guide to how Social Security decides disability explains how long approval can take.

2Who qualifies before 65

Kidney failure is the one route that does not depend on disability benefits. It depends on your own work record or a spouse's or parent's, and on treatment. The dialysis center's social worker usually handles the paperwork, so ask for them if you are in treatment.

3What starts on its own

If you receive SSDI, you do not apply. Social Security enrolls you in Medicare Part A, which covers hospital care, and Part B, which covers doctors and outpatient care. The card arrives by mail about three months before the 25th month, and Part A is premium-free because your disability benefits rest on your work record.

Part B has a premium, $202.90 a month in 2026 for most people, which comes out of your benefit. You can decline Part B, but only do it if you have other coverage you are sure will last, because a later start can bring a permanent late penalty. If you are unsure, our guide to when to sign up for Medicare covers the penalty rules.

Check your my Social Security account or call 1-800-772-1213 if the card has not arrived by the month before your start date. The card shows when Part A and Part B begin, and an error in the date is easier to fix before it matters than after a claim is denied.

Drug coverage does not start on its own. You need to pick a Part D plan, or a Medicare Advantage plan that includes drugs, in the seven months around your 25th month: three months before, the month itself and three months after. Skipping it can also bring a late penalty. See our guide to Part D drug coverage for the costs.

4What it costs once it starts

Medicare under 65 costs the same as Medicare at 65, but the people who get it often have lower incomes and higher medical needs. Original Medicare has no yearly cap on what you pay for covered care, and Part B covers 80 percent of most outpatient services after a deductible. A Medicare Savings Program can pay your Part B premium and some cost-sharing, Extra Help lowers drug costs, and Medicaid can fill most of the rest. Our guide to Medicare Savings Programs lists the income limits, so check them before the card arrives.

5What pays during the wait

Twenty-four months is a long time to go without coverage, and many people do not. The usual sources are:

• A spouse's or parent's employer plan, if you can be added to it.
• Medicaid. Disability and low income can qualify you, and some states cover adults with income up to 138 percent of the poverty level. See our guide to Medicare and Medicaid.
• Marketplace coverage, with premium help based on income, after a coverage loss or in open enrollment. Our guide to Marketplace subsidies explains the credit.
• COBRA, which can be extended from 18 to 29 months if Social Security finds you disabled early in the coverage. See our guide to COBRA for the rules.

Plan the handoff. Tax credits for a Marketplace plan generally stop once you are enrolled in Medicare Part A, so tell the Marketplace when your Medicare date is near. If you keep Medicaid, it often pays your Medicare costs, and a Medicare Savings Program can cover your Part B premium.

6Medigap and Medicare Advantage under 65

Two choices that are routine at 65 are harder before it. Federal law does not require insurers to sell a Medigap policy to people under 65, and the six-month Medigap open enrollment period, when an insurer cannot refuse you for health reasons, begins when you are 65 and enrolled in Part B. Some states do require insurers to offer Medigap to people under 65 with a disability or kidney failure, and some of those policies cost more. Your state insurance department can tell you which applies.

A Medicare Advantage plan is open to anyone with Part A and Part B who lives in the plan's area, including people under 65. People with kidney failure can join Medicare Advantage, which was not allowed before 2021. Our guide to Original Medicare and Medicare Advantage compares the two.

When you turn 65 you get a new Medigap open enrollment period. If you started on Medicare under 65 and could not buy the policy you wanted, mark that birthday.

7If you go back to work, or benefits end

Working does not end Medicare right away. If you return to work and your cash benefits stop, Medicare usually continues for at least 93 months after the trial work period ends, as long as you still have a disabling condition. Our guide to working on SSDI covers the trial work period. If you later turn 65, you move to Medicare by age, and disability benefits convert to retirement benefits at full retirement age.

9What decides your start date

Social Security decides when your entitlement began and when Medicare starts, and the card or notice states the date. This is general information, and your own dates depend on your claim. For kidney failure and ALS, ask the agency or your treatment team how the rules apply.