Where to go to sign up for Medicare online

You sign up for Medicare through Medicare.gov, the official government website. Go to Medicare.gov and look for the "Sign up for Medicare" button on the homepage. This takes you to the enrollment portal where you can create an account and complete your enrollment.

You will need to provide your Social Security number, date of birth, and contact information. The online process walks you through each step and saves your progress if you need to stop and come back later. Most people can complete the entire enrollment online without calling or visiting an office.

If you do not have internet access or prefer to enroll by phone, you can call 1-800-MEDICARE (1-800-633-4227) and a representative will help you over the phone. TTY users can call 1-877-486-2048.

Key Takeaways

  • You enroll through Medicare.gov, not through your doctor, insurance company, or Social Security office.
  • You need your Social Security number, date of birth, and proof of citizenship or legal residency to complete enrollment.
  • Most people become may be able to access for Medicare at age 65, but you should sign up three months before your 65th birthday to avoid late penalties.
  • If you miss the initial enrollment window, you can still sign up during the General Enrollment Period (January 1 to March 31 each year), but you may pay a higher premium.
  • You can enroll online, by phone, or in person at your local Social Security office.

What you need before you start

Gather these documents before you begin the online enrollment:

  • Your Social Security number
  • Your date of birth
  • Your citizenship or legal residency status (you will need to confirm this)
  • Your current contact information (phone number and email address)
  • Information about any current health insurance you have

If you are already receiving Social Security benefits, much of this information is already on file, and the enrollment process will be faster. If you are not yet receiving Social Security, you will need to provide more details to verify your identity.

Have a pen and paper nearby to write down your Medicare number once you receive it. You will also want to note any confirmation numbers the system gives you during enrollment.

Step-by-step: enrolling on Medicare.gov

Open a web browser and go to Medicare.gov. Click the "Sign up for Medicare" button. You will be asked whether you are signing up for the first time or making changes to existing coverage. Select "Sign up for Medicare" if this is your first time.

Create a login account using your email address and a password you choose. Medicare will send you a confirmation email — check your inbox and click the link to verify your email address. This step is required before you can continue.

Log back in and answer questions about your personal information: name, date of birth, Social Security number, citizenship status, and contact details. Answer honestly and carefully, because errors here can delay your coverage or cause problems later.

The system will ask about your current health insurance. If you have coverage through an employer, union, or private plan, report it. If you are uninsured, select that option. Then choose which parts of Medicare you want: Part A (hospital insurance), Part B (medical insurance), or both. Most people enroll in both.

Review your answers on the summary screen. If anything is wrong, go back and correct it. Once you confirm, submit your enrollment. You will receive a confirmation number on screen — write this down and save any confirmation emails Medicare sends you.

When to sign up: timing and important date

You become may be able to access for Medicare the month you turn 65. You should sign up three months before that birthday — this is called your Initial Enrollment Period. For example, if you turn 65 in June, sign up between March and June.

If you sign up during this three-month window, your coverage starts the month you turn 65. If you sign up after your birthday but still within the same calendar year, your coverage may start the following month. If you miss this window entirely, you move into a later enrollment period and may face a permanent penalty on your premiums.

If you are still working and covered by your employer's health plan, you may have a Special Enrollment Period that lets you sign up for Medicare later without penalty. Ask your employer's benefits office whether this applies to you.

The General Enrollment Period runs January 1 to March 31 each year. You can sign up during this time, but coverage does not start until July 1, and you may pay higher premiums if you enroll late.

After you submit your enrollment

Medicare will review your enrollment and send you a confirmation letter in the mail within two to four weeks. This letter includes your Medicare number, which parts of Medicare you are enrolled in, and your coverage start date. Keep this letter in a safe place — you will need your Medicare number for doctor visits and prescriptions.

Your Medicare card will arrive separately, usually within two weeks of the confirmation letter. If you do not receive your card by the time your coverage starts, you can show your confirmation letter to your doctor or pharmacy.

Once your coverage is active, you can start using it when ready. Choose a primary care doctor if you are in Original Medicare (Parts A and B), or review your plan's network if you chose a Medicare Advantage plan. Update your doctors' offices with your new Medicare information so they bill correctly.

Troubleshooting common problems

If you cannot log into Medicare.gov, click "Forgot password?" on the login page and follow the steps to reset it. If you do not remember your email address, call 1-800-MEDICARE and a representative can help you recover your account.

If you submitted your enrollment but did not receive a confirmation number, log back into your Medicare.gov account and check the status of your process. You can also call 1-800-MEDICARE to confirm that your enrollment was received.

If your personal information changed after you enrolled (you moved, changed your phone number, or got married), you can update it by logging into your Medicare.gov account and editing your profile. Changes take effect on the first day of the following month.

If you enrolled in the wrong plan or changed your mind, you have a limited time to make changes. During your Initial Enrollment Period, you can change your selections. After that, you can make changes only during the Annual Enrollment Period (October 15 to December 7 each year) or if you have a may have access to life event.

What happens if you miss the enrollment important date

If you do not sign up during your Initial Enrollment Period and you are not covered by an employer plan, you will pay a permanent penalty on your Part B premium. This penalty is 10 percent of the standard Part B premium for each full year you were may be able to access but not enrolled. The penalty stays with you for life, even after you finally sign up.

You can still sign up during the General Enrollment Period (January 1 to March 31), but your coverage will not start until July 1 of that year. If you have a may have access to life event — such as losing employer coverage, moving to a new state, or getting married — you may have a Special Enrollment Period that lets you sign up without penalty.

Call 1-800-MEDICARE to ask whether a Special Enrollment Period applies to your situation. Explain what changed and when it changed. A representative can tell you whether you can avoid the late penalty.

Frequently Asked Questions

Do I have to sign up online, or can I do it another way?

You can sign up online at Medicare.gov, by phone at 1-800-MEDICARE, or in person at your local Social Security office. Online is usually fastest because you get a confirmation number when ready. By phone, a representative will guide you through the same questions and mail you a confirmation. In person takes longer but may help if you have questions.

What if I am still working at 65 — do I still need to sign up for Medicare?

If your employer has 20 or more employees, you may be able to delay Part B enrollment without penalty. You must still enroll in Part A (hospital insurance) at 65. Ask your employer's benefits office about your company's size and whether you may have access to for a Special Enrollment Period. If you do, you can sign up for Part B later without the late penalty.

Can I change my mind after I enroll online?

Yes, but the time window is limited. During your Initial Enrollment Period (the three months before and after your 65th birthday), you can change your plan selections. After that, you can make changes only during the Annual Enrollment Period (October 15 to December 7) or if you have a may have access to life event. Log into your Medicare.gov account or call 1-800-MEDICARE to make changes.

What if I do not have internet access?

Call 1-800-MEDICARE (1-800-633-4227) and a representative will help you enroll over the phone. They will ask the same questions as the online form and mail you a confirmation. You can also visit your local Social Security office in person. Both options are free and do not require you to have a computer or email address.

When will my Medicare coverage actually start?

If you sign up during your Initial Enrollment Period (three months before to three months after your 65th birthday), coverage starts the month you turn 65. If you sign up after that window, coverage typically starts the month after you enroll. If you sign up during the General Enrollment Period (January 1 to March 31), coverage starts July 1 of that year.