The Main Groups Covered by Medicare

Medicare covers four main groups of people. Most are adults 65 and older who have worked and paid into Social Security. But you can also get Medicare before 65 if you have been receiving Social Security Disability Insurance (SSDI) for 24 months, if you have end-stage renal disease (ESRD), or if you have amyotrophic lateral sclerosis (ALS). Each path has different rules about when coverage starts and what paperwork you need.

You do not automatically receive Medicare when you turn 65. You have to take a step to enroll, and the timing matters — missing the important date can cost you money in penalties for the rest of your life. The same is true if you become disabled or develop ESRD before 65. Understanding which group you fall into is the first step to knowing when and how to sign up.

Key Takeaways

  • People 65 and older who worked and paid Social Security taxes for at least 10 years can get Medicare Part A (hospital insurance) at no monthly cost.
  • You can get Medicare before 65 if you have received SSDI for 24 months, have ESRD, or have ALS — the rules and timing differ for each condition.
  • Spouses and ex-spouses of workers can get Medicare based on their family member's work record, even if they did not work enough years themselves.
  • You must actively enroll in Medicare during your enrollment window, or you will face late penalties that stay with you permanently.
  • Railroad workers, federal employees, and some other groups have different Medicare rules and should check with their specific employer or agency.

Adults 65 and Older With a Work Record

If you are 65 or older and worked for at least 10 years while paying Social Security taxes, you are may have access to to Medicare Part A (hospital insurance) at no monthly premium. You become may be able to access on the first day of the month you turn 65. Part A covers hospital stays, skilled nursing facility care, hospice, and some home health services.

Part B (medical insurance) covers doctor visits, outpatient care, and some preventive services. Part B has a monthly premium that changes each year — it is not free. You can turn down Part B if you are still working and have health coverage through your job, but if you wait to enroll after you leave that job, you will pay a penalty for each month you delayed.

Your spouse or ex-spouse can also get Medicare based on your work record if they are 62 or older, even if they did not work enough years themselves. An ex-spouse can use your record if you were married for at least 10 years and you are at least 62 years old (you do not have to be receiving benefits yourself).

People Under 65 With Disabilities or ESRD

If you have been receiving SSDI for 24 consecutive months, you become may have access to to Medicare Part A and Part B on the first day of the 25th month. You do not have to wait until 65. The 24-month waiting period starts from the month you first received a disability payment, not from the month you applied.

If you have end-stage renal disease (ESRD) — permanent kidney failure requiring dialysis or a transplant — you can get Medicare regardless of age. Coverage usually starts the first day of the month you begin dialysis or the month of your transplant, whichever comes first. If you are already on dialysis when you learn you have ESRD, your coverage date may be retroactive.

If you have amyotrophic lateral sclerosis (ALS), you do not have to wait 24 months. Medicare coverage starts the first month you receive an SSDI payment for ALS. This is the only condition with an when ready pathway to Medicare.

Spouses, Widows, and Divorced Individuals

A spouse age 62 or older can get Medicare based on their husband's or wife's work record, even if that spouse has not yet claimed Social Security. The working spouse must be at least 62 years old. A spouse under 62 can get Medicare only if they are caring for a child under 16 who is receiving benefits on the worker's record.

A widow or widower age 60 or older can get Medicare based on their deceased spouse's work record. If the widow or widower is disabled, they can get Medicare as early as age 50. A divorced widow or widower can use an ex-spouse's record if the marriage lasted at least 10 years.

Children and grandchildren of a worker can also get Medicare if they are disabled and the disability began before age 22. They must be receiving benefits on the worker's record to may have access to.

Railroad Workers and Federal Employees

Railroad workers covered by the Railroad Retirement Board (RRB) do not get Medicare in the same way. Instead, they receive railroad retirement benefits and railroad Medicare benefits, which are similar to but separate from regular Medicare. If you worked for a railroad, contact the RRB directly to understand your coverage — do not assume regular Medicare rules explore.

Federal employees hired before 1984 are covered by the Civil Service Retirement System (CSRS) and may have different Medicare rules. Federal employees hired in 1984 or later are covered by the Federal Employees Retirement System (FERS) and follow standard Medicare rules. If you are a federal employee or retiree, check with your agency's benefits office about your specific Medicare pathway.

Government Employees Without Social Security Coverage

Some state and local government employees do not pay Social Security taxes. Instead, they pay into a government pension system. These workers may not be may have access to to Medicare Part A at 65 unless they have enough quarters of Social Security coverage from other jobs. If you worked for a government employer and did not pay Social Security taxes, you need to find out how many quarters of coverage you have from other employment.

If you do not have enough quarters to get Part A for free, you can buy it at age 65 if you are a U.S. citizen or permanent resident who has lived in the United States for at least five years. The monthly premium for Part A is higher than it would be if you had earned it through work. Contact Social Security to find out your exact quarter count and your options.

Non-Citizens and Permanent Residents

To get Medicare, you must be a U.S. citizen or a permanent resident (green card holder). If you are a permanent resident, you must have lived in the United States for at least five years to be may have access to to Part A. The five years do not have to be continuous, but they must add up to 60 months.

If you are a non-citizen without permanent resident status, you cannot get regular Medicare, even if you have worked and paid taxes. You may be able to get coverage through Medicaid or the Affordable Care Act marketplace, depending on your state and immigration status. Contact your state Medicaid office or a local health center to learn what is available to you.

Frequently Asked Questions

Can I get Medicare if I never worked?

Not on your own record. But you may be able to get Medicare as a spouse, widow, widower, or dependent child if a family member has enough work credits. If you are disabled and have no work record, you cannot get Medicare — you would need to look into Medicaid or other programs.

What if I worked in another country?

Work in another country generally does not count toward Medicare may be able to access. You need 40 quarters of coverage from work in the United States. Some countries have agreements with the U.S. that allow work credits to be combined, but this is rare. Contact Social Security to ask if your country has a totalization agreement.

Do I lose Medicare if I go back to work after 65?

No. Once you are 65 and enrolled in Medicare, you keep it even if you work full-time. If you delayed enrolling in Part B because you had employer coverage, you can enroll without a penalty when you leave that job or lose the coverage.

When should I enroll if I am turning 65?

You should enroll during your Initial Enrollment Period, which is the three months before the month you turn 65, the month you turn 65, and the three months after. If you miss this window and do not have a may have access to reason, you will pay a permanent penalty on Part B and Part D premiums.

How do I find out how many work quarters I have?

Create an account at ssa.gov and view your Social Security Statement, which shows your earnings history and quarter count. You can also call Social Security at 1-800-772-1213 or visit a local Social Security office. Bring a photo ID and proof of citizenship or permanent residency.