Most people qualify for Medicare at age 65 — but age is just the starting point. In 2026, you may qualify for Medicare earlier if you have a qualifying disability, end-stage kidney disease, or ALS. And even at 65, whether you’re automatically enrolled or need to sign up yourself depends on whether you’re already collecting Social Security. This guide covers every path to Medicare eligibility, what it costs, when to enroll, and how to avoid the penalties that follow people who miss their window.
The Basic Requirements
To be eligible for Medicare, you must meet two conditions:
Citizenship or residency: You must be a U.S. citizen or a lawful permanent resident who has lived continuously in the United States for at least five years.
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Work history or qualifying condition: Most people qualify through their own work history or through a spouse’s work history. You or your spouse must have worked and paid Medicare payroll taxes for at least 10 years — 40 quarters of coverage. If you have a qualifying disability, end-stage renal disease (ESRD), or ALS, different rules apply and the work requirement may be modified or waived.
Path 1 — Age 65 (The Standard Route)
Medicare is health insurance for people 65 or older. This is the most common path to coverage, and it applies to the vast majority of enrollees.
To enroll in Medicare, you generally need to be a U.S. citizen or a legal permanent resident who has lived in the United States for at least 5 years, and you or your spouse must have worked and paid Social Security taxes for at least 10 years.
If you and your spouse meet the work history requirement, you qualify for premium-free Part A — meaning you pay no monthly premium for hospital insurance. If you or your spouse did not pay Medicare taxes while working, you may be able to buy Medicare Part A — in 2026, the Part A premium can be up to $565 a month.
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Part B — the medical insurance portion covering doctor visits and outpatient care — requires a monthly premium for everyone. In 2026, the standard Part B premium is $202.90, or higher depending on your income. Higher-income enrollees pay an additional surcharge called IRMAA (Income-Related Monthly Adjustment Amount). In 2026, those with tax-reported incomes over $109,000 (single) and $218,000 (joint) must pay an IRMAA for Medicare Part B and Part D premiums.
Path 2 — Under 65 With a Disability
You do not have to wait until 65 to get Medicare if you have a qualifying disability. You must have received Social Security Disability Insurance (SSDI) benefits for at least 24 months. The waiting period begins the month your SSDI payments start — not the month your disability began or the month you applied.
Once you have received SSDI for 24 months, you are automatically enrolled in Medicare Parts A and B. You do not need to take any action. If you’re permanently disabled and you’ve been receiving Social Security Disability Insurance (SSDI) benefits for at least two years, you’ll be automatically enrolled in Medicare Parts A and B.
Path 3 — End-Stage Renal Disease (ESRD)
End-stage renal disease — permanent kidney failure requiring dialysis or a kidney transplant — qualifies you for Medicare at any age, with no waiting period tied to SSDI. Medicare benefits can begin as soon as the first day after three months following a course of regular dialysis or kidney transplant.
Unlike the disability path, enrollment for ESRD is not always automatic. You’ll need to sign up for Medicare when you first become eligible — contact Social Security or visit your local Social Security office for more information on signing up for Medicare if you have ESRD.
Path 4 — ALS (Amyotrophic Lateral Sclerosis / Lou Gehrig’s Disease)
ALS — also known as Lou Gehrig’s disease — is the one condition that triggers immediate Medicare enrollment with no waiting period of any kind. If you have ALS, you’ll be automatically enrolled in Medicare Parts A and B the month your disability benefits begin — whatever your age is. You do not need to apply separately for Medicare — enrollment happens automatically when your SSDI starts.
Medicare Eligibility at a Glance
| Eligibility Path | Minimum Age | Work History Required | Waiting Period | Automatic Enrollment? |
|---|---|---|---|---|
| Age 65 — standard | 65 | 40 quarters (you or spouse) | None | Yes, if already on Social Security |
| SSDI disability | Any age | Yes (SSDI qualification) | 24 months of SSDI payments | Yes, after 24-month wait |
| End-stage renal disease (ESRD) | Any age | Modified — contact SSA | 3 months after dialysis/transplant | No — must apply |
| ALS (Lou Gehrig’s disease) | Any age | Yes (SSDI qualification) | None | Yes, immediately when SSDI begins |
When to Sign Up — Enrollment Periods Explained
Knowing when to enroll is just as important as knowing whether you qualify. Missing your window can mean months without coverage and permanent premium penalties.
Initial Enrollment Period (IEP)
The Initial Enrollment Period is the first time an eligible person can enroll in Medicare Part A and Medicare Part B. This timeline begins three months before the month of a person’s 65th birthday and continues through the three months following a person’s 65th birthday. That is a total of seven months. If your birthday is in August, your IEP runs from May through November.
When your coverage actually starts depends on which month during the IEP you sign up. Signing up in the three months before your birthday month gets you the earliest possible start date. Waiting until your birthday month or the months after will delay the start of your Part B coverage.
Automatic Enrollment — Do You Need to Do Anything?
Some people are enrolled automatically. If you begin receiving Social Security retirement benefits between age 62 and up to 4 months before turning 65, you will be automatically enrolled in Medicare. The same applies to Railroad Retirement Board (RRB) recipients. If that describes you, your Medicare card will arrive in the mail before your 65th birthday.
If you are not yet receiving Social Security or RRB benefits when you turn 65 — for example, because you are still working and delaying Social Security — you must actively sign up. You can do so at ssa.gov, by calling 1-800-772-1213, or in person at your local Social Security office.
General Enrollment Period (GEP)
If you miss your IEP, you may be able to sign up during the General Enrollment Period, which runs from January 1 to March 31 each year, but this may result in a late enrollment penalty. Coverage for GEP enrollees starts July 1 of the same year.
Special Enrollment Period (SEP) — If You’re Still Working
If you or your spouse has coverage through a current employer’s group health plan at age 65, you can delay Medicare enrollment without penalty. A Special Enrollment Period allows you to sign up for Medicare Part B within eight months of losing that employer coverage or leaving that job — whichever comes first. This applies whether you are the employee or the dependent covered under a spouse’s employer plan.
Important: Retiree coverage and COBRA do not count as active employer coverage for this purpose. If your only coverage at 65 is retiree insurance or COBRA, you should enroll in Medicare during your IEP to avoid penalties.
Annual Enrollment Period (AEP)
The Annual Enrollment Period runs from October 15 to December 7 each year, which allows for switching between Original Medicare and Medicare Advantage plans or changing prescription drug plans. This period is for people who are already enrolled in Medicare and want to change their coverage, not for people enrolling for the first time.
Enrollment Periods Quick Reference
| Period | When | Who It’s For | Coverage Start |
|---|---|---|---|
| Initial Enrollment Period (IEP) | 3 months before to 3 months after your 65th birthday (7 months total) | First-time enrollees turning 65 | As early as your birthday month |
| Special Enrollment Period (SEP) | Within 8 months of losing employer coverage | People with employer coverage at 65 | Usually the following month |
| General Enrollment Period (GEP) | January 1 – March 31 each year | People who missed their IEP | July 1 of the same year |
| Annual Enrollment Period (AEP) | October 15 – December 7 each year | Current enrollees switching plans | January 1 of the following year |
Late Enrollment Penalties — What Happens If You Miss Your Window
Missing your enrollment window has real, lasting consequences.
Part B late penalty: If you don’t enroll in Medicare Part B when you’re first eligible, your monthly premiums may go up by as much as 10% for each year you were eligible but didn’t sign up. In most cases, you’ll have to pay this penalty each time on your monthly premiums, for as long as you have Medicare. A two-year delay means a 20% permanent premium surcharge on top of the standard rate.
Part D late penalty: If you go without Medicare drug coverage (Part D) for 63 or more consecutive days after your IEP ends, you will owe a late enrollment penalty added permanently to your Part D premium when you do eventually enroll.
Part A late penalty: Most people do not owe a Part A penalty because most people qualify for premium-free Part A. If you do have to pay a Part A premium and enroll late, you may pay up to 10% more for twice the number of years you went without coverage.
Medicare Savings Programs — Help With Costs
If your income is limited, you may qualify for a Medicare Savings Program through your state’s Medicaid agency. These programs help pay some or all of your Medicare premiums, deductibles, and copayments:
| Program | Abbreviation | Who It Helps | What It Covers |
|---|---|---|---|
| Qualified Medicare Beneficiary | QMB | Lowest-income enrollees | Parts A and B premiums, deductibles, coinsurance, and copayments |
| Specified Low-Income Medicare Beneficiary | SLMB | Slightly higher income than QMB | Part B premium only |
| Qualifying Individual | QI | Slightly higher income than SLMB | Part B premium only (limited slots, first-come basis) |
| Qualified Disabled and Working Individual | QDWI | Under-65 disabled enrollees who returned to work | Part A premium only |
To apply, contact your state Medicaid office or dial 211. Income and asset limits for these programs vary by state. If you receive SNAP (Food Stamps) or Medicaid, you may already qualify — it is worth checking.
What Medicare Covers — A Quick Summary
Medicare is divided into four parts:
Part A covers inpatient hospital care, skilled nursing facility stays following a hospital admission, hospice care, and some home health services.
Part B covers medically necessary services — doctor visits, outpatient procedures, preventive care, durable medical equipment, and some home health services.
Part C (Medicare Advantage) is an alternative to Original Medicare offered by private insurers. These plans must cover everything Parts A and B cover and typically include drug coverage and additional benefits like dental and vision. Once enrolled in Parts A and B, you can choose a Medicare Advantage plan during your IEP or AEP.
Part D covers prescription drugs. You can add Part D to Original Medicare through a stand-alone drug plan or choose a Medicare Advantage plan that includes drug coverage.
How to Apply for Medicare
Online: Visit ssa.gov to apply for Medicare online in about 10 minutes. You do not need to visit a Social Security office.
By phone: Call Social Security at 1-800-772-1213 (TTY: 1-800-325-0778), Monday through Friday from 8 a.m. to 7 p.m. local time.
In person: Find your nearest Social Security office at ssa.gov/locator.
For questions about Medicare benefits: Call 1-800-MEDICARE (1-800-633-4227), available 24 hours a day, 7 days a week.
Medicare Eligibility by State
Medicare is a federal program, so the core eligibility rules are the same in every state.
But Medicare Savings Programs, Medicaid income limits, and state-specific enrollment assistance vary by where you live.
Select your state below to find your state’s Medicare resources, Medicaid office contact, and local SHIP (State Health Insurance Assistance Program) counselor — free, unbiased Medicare help available in every state.
Frequently Asked Questions
What age do you have to be to get Medicare?
Most people become eligible for Medicare at age 65. You can enroll during the seven-month window that begins three months before your 65th birthday. You may qualify earlier than 65 if you have received SSDI benefits for 24 months, if you have end-stage renal disease requiring dialysis or a kidney transplant, or if you have ALS — in which case enrollment is immediate when your disability benefits begin.
Can I get Medicare if I haven’t worked for 10 years?
You can still get Medicare at 65 — but you may have to pay a premium for Part A. If you (or your spouse) worked and paid Medicare taxes for fewer than 40 quarters, you can buy into Part A. In 2026, that premium is up to $565 per month. You can also qualify through a spouse’s work history if your spouse worked 40 or more quarters, even if you did not.
Does income affect Medicare eligibility?
No — income does not affect whether you qualify for Medicare. However, it does affect what you pay. Higher-income enrollees pay a surcharge (called IRMAA) on top of the standard Part B and Part D premiums. In 2026, the surcharge applies to individuals with incomes over $109,000 per year or married couples filing jointly with incomes over $218,000.
What happens if I miss my Medicare enrollment window?
If you miss your Initial Enrollment Period and do not qualify for a Special Enrollment Period, you can sign up during the General Enrollment Period from January 1 through March 31 each year. Coverage begins July 1 of that year. You will also owe a late enrollment penalty on Part B premiums — 10% for every 12-month period you were eligible but didn’t sign up. That penalty is permanent for as long as you have Medicare.
Do I qualify for Medicare if I’m still working at 65?
Yes — being employed does not disqualify you from Medicare. If you have coverage through your own or a spouse’s current employer group health plan, you can delay Medicare enrollment without penalty until that coverage ends. Once that coverage ends, you have eight months to enroll in Part B through a Special Enrollment Period. However, if your only coverage is COBRA or retiree insurance, those do not count — you should enroll in Medicare during your IEP to avoid a penalty.
Is Medicare the same as Medicaid?
No. Medicare is a federal health insurance program available primarily to people 65 and older and qualifying younger people with disabilities. It is based on work history, not income. Medicaid is a joint federal-state program based on income and assets, with eligibility limits that vary by state. Some low-income Medicare enrollees qualify for both programs — called “dual eligibility” — and can get help from their state Medicaid program paying Medicare premiums and cost-sharing through Medicare Savings Programs.
How do I know if I’ll be automatically enrolled in Medicare?
You will be automatically enrolled in Medicare Parts A and B at 65 if you are already receiving Social Security retirement or Railroad Retirement Board benefits at least four months before you turn 65. You will also be automatically enrolled if you have been receiving SSDI for 24 months, or if you have ALS. If none of those apply to you, you must actively enroll during your Initial Enrollment Period. If you are unsure of your status, call Social Security at 1-800-772-1213.
Can immigrants qualify for Medicare?
Lawful permanent residents who have lived continuously in the United States for at least five years can qualify for Medicare at age 65, provided they or their spouse meet the work history requirement. Undocumented individuals do not qualify for Medicare. If you are unsure about your immigration status and Medicare eligibility, contact the Social Security Administration or a benefits counselor for guidance specific to your situation.
Bottom Line
Medicare eligibility is straightforward for most people — turn 65, have enough work history, and enroll during your seven-month Initial Enrollment Period. The biggest mistake new enrollees make is missing that window and facing permanent premium penalties. Sign up on time, and Medicare provides dependable health coverage for the rest of your life.
If your income is limited, check whether you qualify for a Medicare Savings Program through your state — these programs can significantly reduce what you pay out of pocket for premiums and medical costs.
For help finding what SNAP and other benefits you may qualify for, use our SNAP Eligibility Calculator. To learn more about food assistance programs, see our state-by-state EBT phone number guide or explore surprising things you can buy with EBT.
Last updated: 2026 | Medicare eligibility rules and premium amounts reflect 2026 CMS guidelines and are subject to annual updates. For the most current information, visit medicare.gov or call 1-800-MEDICARE (1-800-633-4227) any time, 24/7.