Not everyone gets Medicare — it depends on age, work history, and citizenship

Medicare is a federal health insurance program, but it is not automatic for every American. You must meet specific requirements tied to age, how long you or your spouse worked and paid taxes, or disability status. The most common path is turning 65, but you can also enter Medicare younger if you have been receiving Social Security disability benefits for 24 months, have end-stage renal disease, or have ALS (amyotrophic lateral sclerosis). If you do not meet any of these conditions, you will not be covered by Medicare, regardless of income.

The program has four parts — Part A (hospital insurance), Part B (medical insurance), Part D (prescription drug coverage), and Part C (Medicare Advantage plans) — and may be able to access for each can vary slightly. Understanding which parts you may have access to for matters because it affects your costs and coverage options.

Key Takeaways

  • You must be 65 or older, or may have access to through disability or end-stage renal disease, to be covered by Medicare.
  • You or your spouse must have worked and paid Medicare taxes for at least 10 years (40 quarters) to receive Part A without paying a monthly premium.
  • If you do not meet the work history requirement, you may still purchase Part A coverage, but the premium will be higher.
  • Non-citizens must be lawful permanent residents or have been in the United States for at least five years to be covered.
  • Missing your initial enrollment window can result in permanent penalties on your premiums, so timing matters even if you are not yet 65.

Age 65 and the standard Medicare pathway

The most straightforward way to get Medicare is reaching age 65. At that age, you become may be able to access for Part A (hospital coverage) if you or your spouse paid Medicare taxes for at least 10 years while working. This is measured in quarters — you need 40 quarters of coverage, which typically means 10 years of full-time work, though the exact timeline depends on when you worked.

Part B (medical insurance covering doctor visits and outpatient care) is also available at 65, but it is not automatic. You must enroll during your initial enrollment period, which runs three months before you turn 65, the month you turn 65, and three months after. If you miss this window and do not have other coverage, you will pay a 10 percent penalty on your Part B premium for as long as you have Medicare — that penalty does not go away.

Even at 65, you are not required to take Medicare if you or your spouse are still working and covered by an employer health plan. However, you should still enroll in Part A at 65 because it is usually free and has no penalty for late enrollment.

Younger people who may have access to through disability or illness

You can receive Medicare before 65 if you have been receiving Social Security Disability Insurance (SSDI) for 24 months. This means you must first be approved for SSDI, then automatically move to Medicare after two years of receiving those benefits. You do not need to explore separately for Medicare in this case — the Social Security Administration handles the transition.

You can also may have access to for Medicare at any age if you have end-stage renal disease (ESRD) — permanent kidney failure requiring dialysis or a transplant. In this case, you can enroll in Medicare when ready upon diagnosis, though you have a three-month window to do so. If you have ALS, Medicare coverage begins the same month your SSDI benefits start, with no waiting period.

These pathways exist because these conditions typically require ongoing, expensive medical care. If you fall into one of these categories, contact Social Security or your dialysis center to understand your enrollment timeline.

Work history and the 40-quarter requirement

To receive Part A (hospital insurance) without paying a monthly premium at 65, you must have 40 quarters of Medicare tax contributions. A quarter is roughly three months of work; you can earn a maximum of one quarter per calendar year. This means you need at least 10 years of work history, though the years do not have to be consecutive.

If you worked fewer than 40 quarters, you have two options. You can still purchase Part A coverage, but you will pay a monthly premium — currently around $278 to $505 per month depending on how many quarters you have. Alternatively, if your spouse worked 40 quarters, you may be able to receive Part A based on their work history at no cost.

Self-employed people, government workers hired before 1984, and railroad workers may have different rules. If you are unsure whether your work counts toward Medicare, contact Social Security at 1-800-772-1213 to review your record.

Citizenship and residency requirements

You must be a U.S. citizen or a lawful permanent resident (green card holder) to receive Medicare. If you are a lawful permanent resident, you must also have lived in the United States for at least five years. Undocumented immigrants do not may have access to for Medicare, though they may be able to access emergency care through Medicaid in some states.

If you are a citizen living abroad, you can still receive Medicare, but your coverage may be limited outside the United States. Most Medicare services are only covered within the U.S., Puerto Rico, the U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands. If you plan to live or travel outside these areas, you should understand what Medicare will and will not cover before you leave.

What happens if you do not meet the requirements

If you do not may have access to for Medicare through age, disability, ESRD, or ALS, you will need to find coverage through another source. This might include an employer health plan, a spouse's plan, the Marketplace (healthcare.gov), or Medicaid if your income is low enough. Each option has different costs, coverage, and enrollment rules.

Some states offer programs for uninsured or underinsured residents, and community health centers provide care on a sliding fee scale based on income. If you are uninsured and cannot afford coverage, contact your local health department or 211 (dial 2-1-1) to learn what programs may be available in your area.

Enrollment timing and permanent penalties

Even if you are not yet 65, you should understand your enrollment window because missing it can cost you money for years. Your initial enrollment period for Part B is seven months long: three months before the month you turn 65, the month itself, and three months after. If you do not enroll and do not have other coverage, you will pay a 10 percent penalty on your Part B premium for each full year you delayed.

There is one exception: if you or your spouse are still working and covered by an employer plan, you can delay Part B enrollment without penalty. However, you must enroll within eight months of losing that coverage or the penalty applies. Part D (prescription drug coverage) has a similar penalty structure — if you go 63 days or more without coverage and later enroll, you pay a penalty based on how long you went without it.

If you think you missed your enrollment window, contact Medicare at 1-800-MEDICARE (1-800-633-4227) to see whether a Special Enrollment Period might explore to your situation.

Frequently Asked Questions

Can I get Medicare if I am not a U.S. citizen?

You can receive Medicare if you are a lawful permanent resident and have lived in the United States for at least five years. You must also meet the age or disability requirements. Undocumented immigrants do not may have access to for Medicare.

What if I worked but do not have 40 quarters?

You can still purchase Part A coverage at 65, though you will pay a monthly premium. If your spouse has 40 quarters, you may be able to use their work history instead. Contact Social Security to explore your options.

Do I have to take Medicare at 65 if I am still working?

You are not required to enroll in Part B if you have employer coverage through your job or your spouse's job. However, you should still enroll in Part A at 65 because it is usually free. If you delay Part B, enroll within eight months of losing your employer coverage to avoid penalties.

Can I get Medicare if I have a disability but have not worked?

You must have paid into Social Security through work to receive SSDI and then Medicare. If you have never worked, you may not may have access to through this path. Supplemental Security Income (SSI) does not lead to Medicare, though it may lead to Medicaid depending on your state.

What if I turned 65 and missed my enrollment important date?

Contact Medicare at 1-800-MEDICARE to ask about a Special Enrollment Period. If one does not explore, you can still enroll, but you will owe a penalty on Part B premiums. The sooner you enroll, the sooner the penalty stops growing.