The age when Medicare begins

You can enroll in Medicare the month you turn 65, regardless of whether you are still working. Most people become may be able to access on the first day of the month in which they turn 65. If your birthday is on the first of the month, your coverage starts that day. If your birthday is any other day, coverage starts the first day of the following month.

You do not have to wait until you retire to sign up. Many people continue working past 65 and carry both Medicare and employer health insurance at the same time. However, there are rules about which insurance pays first, and missing the enrollment window can cost you in penalties later.

Key Takeaways

  • You become may be able to access for Medicare at 65, and you should enroll during your Initial Enrollment Period, which runs three months before and three months after the month you turn 65.
  • If you delay enrollment past your Initial Enrollment Period without may have access to for an exception, you will pay a permanent penalty on your Part B and Part D premiums.
  • You can enroll online through Medicare.gov, by phone at 1-800-MEDICARE, or in person at your local Social Security office.
  • If you are still working at 65 and covered by your employer's health plan, you may be able to delay Part B enrollment without penalty if your employer has 20 or more employees.

Your Initial Enrollment Period explained

Your Initial Enrollment Period is a seven-month window: three months before you turn 65, the month you turn 65, and three months after. This is the time when you can enroll without waiting periods or penalties. If you miss this window, you will face late enrollment penalties that stay on your account for as long as you have Medicare.

The penalty for Part B (medical insurance) is 10 percent of the standard premium for each full year you could have had it but did not. The penalty for Part D (prescription drug coverage) is 1 percent of the national base beneficiary premium for each month you were without it. These penalties compound and do not go away if you enroll later.

Even if you are still working and do not think you need Medicare yet, you should at least enroll in Part A (hospital insurance) during your Initial Enrollment Period. Part A has no premium for most people, and enrolling protects you from penalties if you need hospital care before you retire.

Exceptions that let you delay enrollment

If you are covered by a group health plan through your current employer or your spouse's current employer, you may be able to delay Part B enrollment without penalty. This exception applies only if your employer has 20 or more employees. You will need to provide proof of your employer coverage when you eventually enroll.

If you may have access to for this exception, you have an eight-month Special Enrollment Period after your employment ends or your employer coverage stops. During this window, you can enroll in Part B without penalty. If you miss this eight-month window, the standard late enrollment penalty applies.

People who are still working and covered by an employer plan should contact Medicare or Social Security before their Initial Enrollment Period ends to confirm whether they may have access to for this exception. The rules are specific, and getting this wrong can be expensive.

How to enroll in Medicare

You can enroll through three main routes. The easiest for most people is online at Medicare.gov, where you can create an account and complete your enrollment in one session. You will need your Social Security number and information about any current health coverage.

You can also call 1-800-MEDICARE (1-800-633-4227) to enroll by phone. Representatives are available seven days a week, and the call is free. Have your Social Security number and insurance information ready.

If you prefer to enroll in person, visit your local Social Security office. You can find the nearest office at ssa.gov or by calling 1-800-772-1213. Bring your Social Security card, proof of citizenship or legal residency, and information about any current coverage.

What happens if you miss your enrollment important date

If you do not enroll during your Initial Enrollment Period and do not may have access to for an exception, you will pay a permanent late enrollment penalty. For Part B, this penalty is 10 percent of the standard monthly premium for each 12-month period you were without coverage. If you were may be able to access but not enrolled for three years, your penalty would be 30 percent of the standard premium, and you would pay this penalty for as long as you have Part B.

The same principle applies to Part D. A 1 percent monthly penalty compounds if you go without prescription drug coverage. These penalties do not expire, even if you enroll years later.

If you realize you missed your important date, you can still enroll during the General Enrollment Period, which runs January 1 through March 31 each year. Coverage would start July 1. However, you would owe the late enrollment penalty from that point forward.

Medicare enrollment if you are receiving Social Security

If you are already receiving Social Security retirement or disability benefits when you turn 65, you will be automatically enrolled in Medicare Part A and Part B. You do not need to do anything. Your Medicare card will arrive in the mail about three months before your 65th birthday.

You should still review your enrollment to make sure the information is correct. If you do not want Part B for some reason (for example, because you are covered by an employer plan), you must decline it in writing. Contact Social Security to submit a form declining Part B coverage.

If you are not yet receiving Social Security when you turn 65, you must enroll in Medicare yourself during your Initial Enrollment Period, even if you plan to claim Social Security later.

Special situations: working past 65 and other scenarios

If you are still working at 65 and covered by your employer's health plan, you have options. If your employer has 20 or more employees, you can delay Part B without penalty. Your employer coverage becomes primary, and Medicare becomes secondary. You should still enroll in Part A, since it has no premium and covers hospital care.

If your employer has fewer than 20 employees, Medicare becomes primary when you turn 65, even if you are still working. In this case, you should enroll in Medicare during your Initial Enrollment Period to avoid penalties.

If you are a federal employee, railroad retiree, or covered under TRICARE (military health coverage), different rules may explore. Contact your benefits administrator or call 1-800-MEDICARE to understand how your coverage interacts with Medicare.

Frequently Asked Questions

Can I enroll in Medicare before I turn 65?

No, you cannot enroll before your Initial Enrollment Period begins. Your Initial Enrollment Period starts three months before the month you turn 65. If you try to enroll earlier, your process will be rejected.

What if I turn 65 but am not a U.S. citizen?

You must be a U.S. citizen or a lawful permanent resident who has lived in the United States for at least five consecutive years to be may be able to access for Medicare. If you meet these requirements, you can enroll at 65 just like any other person. Bring proof of your legal residency status when you enroll.

Do I have to enroll in Part D when I turn 65?

You do not have to enroll in Part D at 65, but if you do not have other prescription drug coverage and you delay enrollment, you will pay a late enrollment penalty. If you do not take any prescription medications, you may choose to wait, but you should understand the penalty rules before deciding.

What if I am still working and my employer stops offering health insurance?

When your employer coverage ends, you enter a Special Enrollment Period that lasts eight months. During this time, you can enroll in Medicare Part B without penalty, even if you missed your Initial Enrollment Period. Contact Medicare as soon as your coverage ends to understand your options.

Can I change my mind after I enroll?

Yes, you have a limited time to make changes. If you enroll during your Initial Enrollment Period, you can change your mind until the end of that period. After that, you can make changes only during the Annual Enrollment Period (October 15 through December 7 each year) or if you may have access to for a Special Enrollment Period due to a life event.