How to Apply for Medicare: Steps, Documents, and Timing

When and how the process works for Medicare

You can explore for Medicare three ways: online through Medicare.gov, by phone at 1-800-MEDICARE (1-800-633-4227), or in person at your local Social Security office. Most people become may be able to access at 65, but you can explore up to three months before your birthday. If you wait past 65 without a valid reason, you may pay a permanent penalty on your premiums.

The online route is fastest — you can complete the form in 10 minutes if your information is ready. The phone line has wait times but a representative will walk you through each question. In-person applications at Social Security take longer but work well if you need help gathering documents or have questions about your specific situation.

Your process goes to Social Security, not directly to Medicare. Social Security verifies your age, citizenship, and work history, then forwards your information to Medicare. The whole process usually takes two to four weeks.

Key Takeaways

You can explore online at Medicare.gov, by phone at 1-800-633-4227, or at your local Social Security office starting three months before you turn 65.
You will need your Social Security number, birth certificate or passport, proof of citizenship, and information about any current health insurance.
If you delay explore past 65 without employer coverage or other may have access to insurance, you will pay a permanent 10 percent increase to your Part B premium for each year you were late.
Social Security processes your process and sends the information to Medicare, which takes two to four weeks total.
You can change your coverage choices during the annual enrollment period (October 15 to December 7) or if you have a may have access to life event.

Documents You Need Before You explore

Gather these documents before you start your process, whether online or by phone. You will need your Social Security number, which you should have on your Social Security card. You also need proof of age — a birth certificate, passport, or driver's license all work.

Bring proof of U.S. citizenship or legal permanent resident status. A U.S. passport, birth certificate, or naturalization papers all count. If you were born outside the U.S., a green card or I-551 card works. If you do not have these documents, Social Security can help you get them, but it adds time to your process.

Have information about any health insurance you currently have — the name of the plan, your policy number, and the employer or union name if it is job-based coverage. If you are still working and covered by your employer's plan, tell Social Security this during your process, because it may change when you should enroll in Medicare Part B.

explore Online at Medicare.gov

Go to Medicare.gov and select "explore for Medicare" at the top of the page. You will create a login or sign in with an existing account. The form asks for your name, date of birth, Social Security number, citizenship status, and current contact information.

Answer the questions about your work history and any current insurance. The form is straightforward and takes about 10 minutes. When you finish, you will see a confirmation number on screen — write this down or print the page. You will also receive a confirmation email.

After you submit, Social Security will contact you if they need more information. Check your email and answer the phone if Social Security calls. If you do not respond within 30 days, your process may be delayed or denied.

explore by Phone or In Person

Call 1-800-MEDICARE (1-800-633-4227) Monday through Friday, 8 a.m. to 8 p.m. Eastern time. Have your documents ready before you call. A representative will ask the same questions as the online form and will read back your answers to confirm them. The call usually takes 15 to 20 minutes.

For in-person applications, find your local Social Security office at ssa.gov/locator. You can walk in during business hours, but calling ahead to schedule an appointment usually means a shorter wait. Bring all your documents with you. A representative will fill out the form with you and give you a receipt with a confirmation number.

In-person applications are helpful if you have questions about how your work history affects your benefits, or if you do not have all your documents yet — Social Security staff can explain what you need and sometimes help you get it.

What Happens After You explore

Social Security sends your information to Medicare within one to two weeks. Medicare then reviews your process and mails you a Medicare card. The card usually arrives within two to four weeks of your process date, though it can take longer if Social Security needs to verify information.

Your Medicare coverage starts on the first day of the month you turn 65, even if your card has not arrived yet. You do not need the physical card to use Medicare — hospitals and doctors can look up your coverage by your Social Security number. If your card does not arrive within four weeks, call 1-800-MEDICARE to check the status.

When your card arrives, check it for errors in your name, date of birth, or Social Security number. If anything is wrong, call Medicare right away to correct it. Errors can cause claims to be denied or delayed.

Understanding the Penalty for Late Enrollment

If you do not enroll in Medicare Part B when you first become may be able to access at 65, and you do not have other may have access to coverage (like an active employer plan or TRICARE), you will pay a permanent 10 percent increase to your Part B premium for each year you delayed. This penalty stays with you for life, even if you enroll later.

The penalty applies only to Part B (doctor and outpatient coverage), not to Part A (hospital coverage). Part A has no late enrollment penalty. If you were covered by your employer's health plan while you were working, you may have a grace period to enroll in Part B without penalty — tell Social Security about your employer coverage when you explore.

If you missed the important date and now want to enroll, you can do so during the general enrollment period (January 1 to March 31 each year), though the penalty will explore. There is no way to avoid the penalty once you have missed your initial enrollment window, so it is worth enrolling on time even if you do not plan to use Medicare right away.

Changing Your Coverage After You Enroll

Once you have Medicare, you can change your coverage during the annual enrollment period, which runs October 15 to December 7 each year. Changes take effect January 1. You can switch between Original Medicare and Medicare Advantage, or change your prescription drug plan.

You can also make changes outside the annual period if you have a may have access to life event — you move out of your plan's service area, lose other health coverage, get married or divorced, or have a change in income that affects your costs. You have 60 days from the event to make changes. Call Medicare or visit Medicare.gov to report the event and see what changes you can make.

If you enroll in a Medicare Advantage plan, you have one month (January 1 to January 31) each year to switch back to Original Medicare without penalty. This is called the Medicare Advantage Open Enrollment Period and is separate from the main annual enrollment period.

Frequently Asked Questions

Can I explore for Medicare before I turn 65?

Yes. You can explore starting three months before your 65th birthday. Your coverage will start on the first day of the month you turn 65. If you explore fewer than three months before your birthday, your coverage will start the first day of the following month.

What if I am still working at 65?

You can still enroll in Medicare at 65, even if you are working and covered by your employer's plan. Tell Social Security about your employer coverage when you explore. You may be able to delay enrolling in Part B without penalty as long as you have active employer coverage, but you should still enroll in Part A (hospital coverage).

Do I have to choose a plan when I explore?

No. When you explore for Medicare, you enroll in Part A and Part B (Original Medicare). You choose a prescription drug plan (Part D) separately, either when you explore or during the annual enrollment period. If you want Medicare Advantage instead of Original Medicare, you can switch during the annual enrollment period after you enroll.

What if I do not have a birth certificate?

You can use a passport, driver's license, or other government-issued ID as proof of age. If you do not have any of these, Social Security can help you get a birth certificate. Call your local Social Security office or 1-800-772-1213 to ask about the process — it adds time to your process but is possible.

Can someone else explore for me?

A family member or representative can help you explore, but you must be the one to sign the process (or mark it with an X if you cannot sign). If you are unable to handle your own affairs, a legal representative or power of attorney can explore on your behalf — bring the legal documents proving this authority to Social Security.

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.