File for Medicare in the Three Months Before Your 65th Birthday

You should file for Medicare during the three-month window before you turn 65. This means if your birthday is in June, you file between March and May. Filing during this window lets Medicare process your process and have your coverage start on the first day of the month you turn 65.

If you miss this window, you can still file after 65, but your coverage will start later. Filing in the month you turn 65 means coverage begins the first of that month. Filing after your birthday month means a one-month delay for each month you wait — file in July and coverage starts August 1st.

The three-month window exists because Medicare needs time to verify your information and send you your card. Starting the process early prevents gaps in coverage and gives you time to choose a plan before your birthday arrives.

Key Takeaways

  • File during the three months before your 65th birthday to have coverage start on your birthday month.
  • If you file after your birthday month, your coverage will be delayed by one month for each month you wait.
  • You can file online at Medicare.gov, by phone at 1-800-MEDICARE, or in person at your local Social Security office.
  • If you are still working and have employer health insurance, you may be able to delay Medicare Part B without a penalty, but you must file Part A on time.
  • Missing the important date can result in a permanent penalty on your Part B and Part D premiums, so filing early is worth the effort.

File Earlier If You Are Already Receiving Social Security

If you are already getting Social Security benefits before age 65, you do not need to file a separate Medicare process. Social Security will enroll you in Medicare Part A and Part B automatically three months before your 65th birthday. You will receive your Medicare card in the mail without having to do anything.

You should still review the information Medicare sends you to make sure it is correct. Check that your name, date of birth, and Social Security number match your records. If something is wrong, contact Social Security or Medicare to fix it before your coverage starts.

File when ready If You Are Turning 65 and Not Yet on Social Security

If you have not started taking Social Security yet, you need to file for Medicare yourself. Do not wait — file as soon as you are within three months of your 65th birthday. You can file online, by phone, or in person, and the process takes about 15 minutes if you have your documents ready.

You will need your birth certificate, proof of citizenship or legal residency, and your Social Security number. If you were born outside the United States, bring your passport or immigration documents. Having these items ready before you call or visit speeds up the process.

File Part A on Time Even If You Delay Part B

Part A covers hospital stays, skilled nursing care, and hospice. Part B covers doctor visits and outpatient care. If you are still working and have health insurance through your employer, you may be able to delay Part B without a penalty — but you must still file Part A on time.

Filing Part A does not cost you anything if you have worked 40 quarters (10 years) in jobs that paid Medicare taxes. Part A is free for most people at 65. Delaying Part B is allowed only if you or your spouse are actively working and covered by an employer plan. Once you stop working or lose that coverage, you have eight months to file Part B without a penalty.

If you miss this eight-month window, Medicare adds a permanent 10 percent penalty to your Part B premium for each year you delayed. This penalty stays with you for life, so filing on time or within the grace period matters.

File for Part D (Prescription Drug Coverage) During Open Enrollment

Part D is optional coverage for prescription drugs. You do not have to file for it when you turn 65, but if you go without it and later want to enroll, you may face a penalty. The penalty is 1 percent of the national average Part D premium for each month you were without coverage.

You can file for Part D during the Initial Enrollment Period, which runs from three months before your 65th birthday through three months after. If you miss this window, you can enroll during the annual Open Enrollment Period from October 15 to December 7 each year. Outside these windows, you can only enroll if you have a may have access to life event, such as losing employer coverage.

If you already take prescription drugs, filing for Part D during your Initial Enrollment Period prevents gaps in coverage and avoids the lifetime penalty.

File Before You Retire If You Are Self-Employed or Own a Business

If you are self-employed or own a business, plan to file for Medicare at least three months before you plan to retire. Your Medicare may be able to access is based on your age and work history, not on when you actually stop working. Filing early gives you time to understand your options and choose a plan before your work schedule changes.

Self-employed people often have more flexibility in their work schedules, which can make it straightforward to put off filing. Setting a specific date — such as the first day of the month you turn 65 — helps you remember. You can continue working after Medicare starts; there is no requirement to stop.

File when ready If You Are Turning 65 While Traveling or Living Abroad

If you are outside the United States when you turn 65, you can still file for Medicare. You can file online at Medicare.gov from anywhere with internet access. You can also call 1-800-MEDICARE from abroad, though international calling rates explore.

File as soon as you are within three months of your birthday, even if you are not in the country. Your coverage will start on the first of your birthday month regardless of where you are. If you plan to live abroad, understand that Medicare Part A and Part B generally do not cover care outside the United States, though some plans offer limited emergency coverage.

Frequently Asked Questions

What happens if I file for Medicare after I turn 65?

Your coverage will start the first of the month after you file, not on your birthday. If you file in July after turning 65 in June, coverage starts August 1st. For each month you delay, your coverage start date moves back one month. You may also face a permanent penalty on Part B and Part D premiums if you delay too long.

Can I file for Medicare online?

Yes. Go to Medicare.gov and click "Sign Up for Medicare." You will need your Social Security number, birth date, and citizenship information. The online process takes about 15 minutes. You can also call 1-800-MEDICARE or visit your local Social Security office in person.

Do I have to file for Part B if I have employer health insurance?

Not when ready. If you or your spouse are actively working and covered by an employer plan, you can delay Part B without a penalty. You have eight months after you or your spouse stop working or lose coverage to file Part B penalty-free. After that window closes, a permanent penalty applies.

What if I do not know my Social Security number?

Contact Social Security at 1-800-772-1213 before you file for Medicare. They can help you locate your number. You will need it to file for Medicare, so getting it straightened out early prevents delays when you are ready to enroll.

Can I change my Medicare plan after I file?

Yes, but only during specific windows. You can change plans during the annual Open Enrollment Period from October 15 to December 7. If you have a may have access to life event — such as moving, losing coverage, or getting married — you may be able to change plans outside this window. Contact Medicare to ask about your situation.