When You Can Start Medicare: Age Requirements and Timing

The standard age to start Medicare is 65

You become may be able to access for Medicare at age 65, regardless of whether you are still working. This is the age set by federal law, and it applies to everyone — there are no exceptions based on health, income, or employment status.

You do not have to wait until you turn 65 to sign up, though. You can enroll starting three months before your 65th birthday. This means if you turn 65 in June, you can sign up beginning in March. Signing up early gives you time to choose a plan and make sure your coverage starts on time.

If you miss the window around your birthday, you can still sign up later, but waiting may cost you more in premiums. Each month you delay past 65 without other coverage, your Part B and Part D premiums increase by a percentage that stays with you for life.

Key Takeaways

You become may be able to access for Medicare at age 65, and you can sign up three months before your birthday.
If you are still working and have health insurance through your job, you may be able to delay Part B without a penalty.
Delaying Medicare past 65 without employer coverage results in permanent premium increases for Part B and Part D.
Some people under 65 may may have access to for Medicare if they receive Social Security disability benefits or have end-stage renal disease.
You should contact Social Security or Medicare directly to confirm your may be able to access date and understand your enrollment window.

What happens if you are still working at 65

If you are still employed and your employer offers health insurance, you do not have to sign up for Medicare at 65. You can delay Part B (medical insurance) without penalty as long as you have group health plan coverage through your current job. This rule applies if you work for a company with 20 or more employees.

You should still sign up for Part A (hospital insurance) at 65, even if you are working, because Part A has no premium for most people. Delaying Part A can result in permanent penalties if you wait too long.

When you leave your job or lose the employer coverage, you have a special enrollment period — usually eight months — to sign up for Part B without the late penalty. You will need to show proof that you had group coverage through work. Keep your health plan documents and any letters from your employer stating your coverage dates.

People under 65 who may may have access to for Medicare

You do not have to wait until 65 if you receive Social Security Disability Insurance (SSDI). After you have been on SSDI for 24 months, you become may be able to access for Medicare regardless of your age. This means someone who starts receiving disability at age 40 can enroll in Medicare at age 42.

You also may have access to for Medicare before 65 if you have end-stage renal disease (ESRD) — permanent kidney failure requiring dialysis or a transplant. You can sign up for Medicare as soon as your doctor determines you need dialysis, even if you have not yet started treatment. If you receive a kidney transplant, you remain on Medicare for at least 36 months after the transplant, even if your new kidney works perfectly.

A third group includes people with amyotrophic lateral sclerosis (ALS), also called Lou Gehrig's disease. You become may be able to access for Medicare when ready upon approval for Social Security disability benefits, without waiting the usual 24 months.

How to sign up around your 65th birthday

You can sign up for Medicare online at Medicare.gov, by phone at 1-800-MEDICARE, or in person at your local Social Security office. The easiest route for most people is the website, where you can complete the process in about 15 minutes if you have your Social Security number and birth date ready.

Start the process three months before your birthday. If your birthday is June 15, begin in mid-March. This timing gives Medicare time to process your enrollment and send you your card before your coverage starts on July 1.

When you sign up, you will choose between Original Medicare (Part A and Part B) or a Medicare Advantage plan. You will also choose a prescription drug plan (Part D) if you want drug coverage. These choices do not lock you in forever — you have a chance to change plans each year during the annual enrollment period from October 15 to December 7.

What happens if you miss your enrollment window

If you do not sign up during your initial enrollment period — the three months before your birthday, your birthday month, and the three months after — you can still sign up later during the general enrollment period (January 1 to March 31 each year). However, your coverage will not start until July 1 of that year, leaving you uninsured for months.

More importantly, you will face a late enrollment penalty on Part B and Part D that increases the longer you wait. For Part B, the penalty is 10 percent of the standard premium for each full year you were may be able to access but did not sign up. For Part D, the penalty is 1 percent of the national average premium for each month you were may be able to access but did not have coverage. These penalties are permanent — they do not go away even after you finally sign up.

The only way to avoid the late penalty is to show that you had other creditable coverage (like an employer plan or COBRA) during the time you were not on Medicare. You will need to provide proof of that coverage when you sign up.

Confirming your may be able to access and enrollment date

Your Medicare may be able to access date is usually the first day of the month in which you turn 65. If your birthday is June 15, your may be able to access date is June 1. If your birthday is June 1, your may be able to access date is also June 1. This matters because it determines when your coverage can start.

You can confirm your may be able to access by creating an account on Medicare.gov or by calling Social Security at 1-800-772-1213. Have your Social Security number ready. Social Security will tell you your exact may be able to access date and answer questions about whether you need to sign up or can delay based on your work situation.

If you are unsure whether your employer coverage counts as creditable coverage, ask your employer's benefits department directly. They can provide a letter stating your coverage dates and whether it meets Medicare's standards. This letter protects you if you later need to prove you had coverage during a gap.

Questions to ask your doctor or Social Security

Ask your doctor: "Do I have any conditions that might make me may be able to access for Medicare before 65?" This matters if you have kidney disease, ALS, or are explore for disability. Your doctor's documentation will support your process.

Ask Social Security: "What is my exact Medicare may be able to access date?" and "If I am still working, do I need to sign up for Part B now, or can I delay?" Social Security handles Medicare enrollment and can walk you through your specific situation based on your work status.

Ask your employer's benefits department: "Does my health plan count as creditable coverage for Medicare purposes?" This prevents you from being penalized later if you delay Medicare while still employed.

Frequently Asked Questions

Can I sign up for Medicare before I turn 65?

Yes. You can sign up starting three months before your 65th birthday. For example, if you turn 65 on September 20, you can enroll beginning June 20. Your coverage will start on the first day of the month you turn 65 (September 1 in this example).

What if I am still working and do not want Medicare yet?

If your employer has 20 or more employees and offers health insurance, you can delay Part B without penalty. You should still sign up for Part A at 65 because it has no premium. When you leave your job, you have eight months to sign up for Part B without a late penalty.

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

No. Once you are on Medicare, you stay on it even if you return to work or get new employer coverage. Your Medicare and employer coverage can work together. You do not have to choose one or the other.

What if I was on disability and now I am turning 65?

Your Medicare coverage continues automatically. You do not need to re-enroll. If you were on SSDI for 24 months before turning 65, you are already on Medicare, and it straightforward continues under the age-65 rules.

How much does it cost to sign up for Medicare?

There is no cost to sign up. However, Medicare has monthly premiums for Part B (medical insurance) and Part D (prescription drugs) if you choose those parts. Part A (hospital insurance) has no premium for most people. The exact amounts change each year.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.