File for Medicare Three Months Before You Turn 65

You should file for Medicare during the three-month window before your 65th birthday. This means if you turn 65 in June, you file anytime from March through May. Filing during this window ensures your coverage starts on the first day of the month you turn 65, with no gap in protection.

The Social Security Administration processes Medicare enrollment during this period. You do not need to wait until your birthday month itself — filing early in the window gives the system time to process your request and mail your card before coverage begins.

Key Takeaways

  • File during the three months before you turn 65 so coverage starts the first day of your birthday month.
  • If you miss the initial window, you can still file, but your coverage start date will be delayed and you may pay higher premiums permanently.
  • You file through Social Security, either online at ssa.gov, by phone at 1-800-772-1213, or in person at your local Social Security office.
  • If you are already receiving Social Security benefits, you are enrolled in Medicare automatically at 65 and do not need to file separately.
  • Working past 65 and having employer health coverage can change when you should file, so check with your employer's benefits office first.

What Happens If You Miss the Initial Filing Window

If you do not file during the three months before your 65th birthday, you can still file after you turn 65. However, your coverage will not start until the month after you file. For example, if you turn 65 in June but do not file until August, your Medicare coverage begins in September, leaving you uninsured for two months.

More importantly, filing late can result in a permanent penalty on your Part B premiums (the medical insurance portion). For each 12-month period you delay filing after you first become may be able to access, your Part B premium increases by 10 percent for as long as you have Medicare. This penalty does not go away, even if you eventually file.

Special Situations: Working Past 65 or Employer Coverage

If you are still working and your employer offers health coverage, the rules change. You may be able to delay filing for Medicare without penalty if your employer has 20 or more employees. In this case, you can keep your employer coverage as your primary insurance and file for Medicare later when you retire or lose that coverage.

Before you decide to delay, contact your employer's benefits office or human resources department. They can tell you whether your plan qualifies for this exception. If it does, you have up to eight months after your employment ends or your coverage stops to file for Medicare without facing a late penalty.

If your employer has fewer than 20 employees, Medicare becomes your primary coverage at 65 even if you are still working. In that case, file during your initial window to avoid penalties.

How to File: Three Ways to Reach Social Security

You file for Medicare through the Social Security Administration. You have three options: online, by phone, or in person.

Online: Visit ssa.gov and create a my Social Security account if you do not already have one. Once logged in, you can file for Medicare directly. This is the fastest method and you can do it anytime, day or night.

By phone: Call Social Security at 1-800-772-1213. Representatives are available Monday through Friday, 7 a.m. to 7 p.m. Eastern time. Have your Social Security number and birth certificate information ready.

In person: Visit your local Social Security office. You can find the nearest one at ssa.gov/locator. Bring your Social Security card, birth certificate, and proof of citizenship (passport, naturalization papers, or state ID).

If You Already Receive Social Security Benefits

If you are already collecting Social Security retirement or disability benefits when you turn 65, you do not need to file separately for Medicare. The Social Security Administration enrolls you automatically and mails your Medicare card about three months before your 65th birthday.

Check the mail around three months before your birthday. Your card should arrive with information about your coverage. If you do not receive it by two weeks before your birthday, call Social Security at 1-800-772-1213 to confirm enrollment.

Documents You Will Need to File

Have these documents ready before you file, whether you are explore online, by phone, or in person:

  • Your Social Security number
  • Your birth certificate or other proof of birth date
  • Proof of U.S. citizenship or legal residency (passport, naturalization certificate, or state-issued ID)
  • Your current mailing address

If you are filing in person, bring the original documents or certified copies. If you are filing online or by phone, you will not need to submit documents when ready, but Social Security may ask for them later to verify your information.

What Happens After You File

After you file, Social Security processes your request and mails your Medicare card. This usually takes two to four weeks. Your card will show your Medicare number and which parts of Medicare you are enrolled in (typically Part A and Part B).

Your coverage begins on the first day of the month you turn 65 if you filed during the initial window, or the first day of the month after you file if you filed late. You do not need to do anything else — Medicare coverage is automatic once you file.

Frequently Asked Questions

Can I file for Medicare before I turn 64?

No. You can only file during the three-month window before you turn 65. If you try to file earlier, Social Security will not process your request. The earliest you can file is three months before your birthday.

What if I turn 65 on the first day of the month?

File during the three months before that date, just as you would for any other birthday. Your coverage will still start on the first day of the month you turn 65. The exact day of your birthday within the month does not change the coverage start date.

Do I need to file if I have Veterans benefits or TRICARE?

Yes. Even if you have other military or veteran coverage, you must file for Medicare at 65. Medicare becomes your primary coverage at that age. Contact your Veterans Affairs office or TRICARE representative to understand how your benefits coordinate with Medicare.

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

You can file for Medicare if you are a lawful permanent resident (green card holder) and have lived in the United States for at least five years. Bring your green card and proof of residency when you file. Other visa statuses may have different rules — contact Social Security to confirm your situation.

Can I file for my spouse?

No. Each person must file for themselves. If your spouse is turning 65, they need to file during their own three-month window. You can help them gather documents or accompany them to the Social Security office, but they must be the one to submit the request.