You become may be able to access for Medicare at 65, but you can start earlier if you have been receiving Social Security disability benefits for 24 months or have end-stage renal disease or ALS

The standard age is 65. You do not have to be retired, and you do not have to stop working. If you turn 65 and are still employed, you can sign up for Medicare while you keep your job. Your employer's health plan and Medicare can work together, with Medicare as the secondary payer.

If you are younger than 65, you may still be able to join Medicare under three circumstances: you have been on Social Security Disability Insurance (SSDI) for 24 consecutive months; you have end-stage renal disease (ESRD) and need dialysis or a transplant; or you have been diagnosed with amyotrophic lateral sclerosis (ALS), also called Lou Gehrig's disease. People with ALS become may be able to access when ready upon diagnosis, without waiting.

Key Takeaways

  • You are may be able to access to join Medicare at 65, whether or not you are retired or still working.
  • If you have been on SSDI for 24 months, you become may be able to access before 65, and Medicare begins the month after your 25th month of disability payments.
  • People with end-stage renal disease or ALS can join Medicare at any age once their condition is documented.
  • You must sign up during your enrollment window or face a permanent penalty on your premiums, even if you have other health coverage.
  • Your birth month determines your Initial Enrollment Period, a seven-month window centered on the month you turn 65.

How the Initial Enrollment Period works

Your Initial Enrollment Period is a seven-month window. It starts three months before the month you turn 65, includes the month you turn 65, and ends three months after. For example, if you turn 65 in June, your window runs from March through September.

You can sign up anytime during those seven months. The month your coverage starts depends on when you sign up. If you sign up in the month you turn 65 or earlier, coverage typically begins the first day of the month you turn 65. If you sign up after that month, coverage begins the first day of the month after you sign up.

This window matters because if you miss it and do not have a valid reason, you will pay a permanent 10% increase on your Part B premium for each full year you were may be able to access but did not sign up. That penalty stays with you for life.

When you are still working at 65

If you are covered by an employer health plan through your own job (not your spouse's), you may be able to delay Medicare Part B without penalty. This is called creditable coverage. You must have actual coverage through the employer plan — not just be may be able to access for it.

You still need to sign up for Part A (hospital insurance) at 65, even if you delay Part B. Part A has no premium if you or your spouse paid Medicare taxes for at least 10 years, so there is no financial reason to wait. You can sign up for Part A alone and delay Part B until you leave the job or lose the employer coverage.

When you do leave the job, you have eight months from the date your coverage ends to sign up for Part B without penalty. Keep your final pay stub or a letter from your employer showing your coverage ended — you will need proof of the date.

SSDI recipients and the 24-month rule

If you receive SSDI, you become may be able to access for Medicare after 24 consecutive months of payments. You do not have to be 65. Medicare begins automatically the month after your 25th month of benefits, so you do not have to sign up — it happens on its own.

The 24 months must be consecutive. If your benefits stop and restart, the clock resets. If you return to work and your benefits pause, that break counts against the consecutive requirement. Contact Social Security to confirm your count if you have had any breaks in your benefits.

You will receive a Medicare card in the mail about three months before your coverage starts. If you do not receive it, contact Social Security or Medicare to confirm your coverage date.

End-stage renal disease and ALS

If you have end-stage renal disease (ESRD), you become may be able to access for Medicare once you start dialysis or are on a waiting list for a kidney transplant. You do not have to wait until 65. Your nephrologist's office or dialysis center can help you understand the timing and can refer you to someone who handles Medicare enrollment.

If you have ALS, you become may be able to access when ready upon diagnosis. You do not have to wait 24 months or reach 65. Your doctor can provide the documentation needed to start the enrollment process right away.

In both cases, you will need medical documentation from your healthcare provider. The Social Security office or your local Medicare office can tell you exactly what paperwork they need.

What happens if you miss your enrollment window

If you pass your Initial Enrollment Period without signing up and you do not have a valid reason, you will face a permanent penalty. For Part B, that penalty is 10% of the standard premium for each full year you were may be able to access but not enrolled. The penalty applies for as long as you have Part B.

A valid reason to miss the important date is called a Special Enrollment Period. The most common one is losing employer coverage. If you were covered by an employer plan and that coverage ended, you have eight months to sign up for Part B without penalty. Other reasons include moving out of your plan's service area, losing Medicaid, or having a family member's coverage end.

If you think you have a valid reason, contact Medicare or Social Security to ask. Do not assume you are protected — the rules are specific, and the burden is on you to prove the reason was valid.

Signing up before or at 65

You can sign up online at Medicare.gov, by phone at 1-800-MEDICARE (1-800-633-4227), or in person at your local Social Security office. Online is usually fastest — the website lets you create an account, review your information, and complete enrollment in one session.

If you sign up online, you will need your Social Security number, date of birth, and citizenship or immigration status. The system will show you which parts of Medicare you are may be able to access for and let you choose your coverage. You will receive your Medicare card by mail within about two weeks.

If you prefer to call or visit in person, have your Social Security number and birth certificate or passport ready. The process takes about 15 to 20 minutes by phone.

Frequently Asked Questions

Do I have to retire to get Medicare at 65?

No. You can be working full-time and still sign up for Medicare at 65. If your employer offers health coverage, Medicare and the employer plan can coordinate, with one paying first and the other second depending on the situation.

What if I am not a U.S. citizen?

You must be a U.S. citizen or have been a lawful permanent resident for at least five consecutive years. Certain other immigration statuses may may have access to. Contact Medicare at 1-800-633-4227 to discuss your specific situation.

Can I sign up for Medicare before I turn 65?

Yes, during your Initial Enrollment Period, which starts three months before you turn 65. You can sign up as early as three months before your 65th birthday. If you sign up that early, your coverage will still begin the first day of the month you turn 65.

What if I was on SSDI but returned to work and my benefits stopped?

If your benefits stop, your 24-month count resets. You will need to accumulate 24 new consecutive months of SSDI payments before Medicare begins. Contact Social Security to confirm your current count and when you might become may be able to access again.

Is there a penalty if I delay Medicare because I am still working?

No penalty if you have creditable coverage through your employer. You must have actual health coverage through your job (not just be may be able to access). When you leave the job, you have eight months to sign up for Part B without penalty. Keep proof of when your coverage ended.