Yes, you can sign up for Medicare online, but not for everything

You can create a Medicare account online and use it to view your coverage, pay premiums, and change some plan details. You cannot complete your initial sign-up for Medicare entirely online — at some point you will need to submit documents or speak to someone. The route you take depends on whether you are turning 65, switching plans, or signing up late.

Medicare.gov is the official place to start. You can create an account there in about 10 minutes, but that account is separate from actually enrolling in coverage. Enrollment itself — the step that actually gets you a Medicare card — happens through Medicare.gov, by phone, by mail, or through an insurance agent, depending on which part of Medicare you are joining and when.

Key Takeaways

  • You can start the sign-up process on Medicare.gov by creating an account and answering questions about your situation, but you cannot finish enrollment entirely online.
  • If you are turning 65, you have a seven-month window starting three months before your birthday month; missing it triggers a permanent penalty on your premiums.
  • Medicare Part A (hospital insurance) is usually automatic at 65 if you have been paying Social Security taxes, but you still need to confirm you want it.
  • Medicare Part B (doctor visits) requires you to actively choose it during your enrollment window, and you can do this on Medicare.gov, by phone at 1-800-MEDICARE, or by mail.
  • If you miss your initial enrollment window, you can still sign up during the General Enrollment Period (January 1 to March 31 each year), but you will pay a higher monthly premium.

What you can and cannot do on Medicare.gov

On Medicare.gov, you can create a personal account, review your may be able to access, compare Medicare Advantage and Medigap plans, and enroll in Part B or Part D (prescription drug coverage) if you are in your enrollment window. You can also change your plan during the annual open enrollment period (October 15 to December 7) or if you have a may have access to life event.

What you cannot do online: you cannot upload documents to prove your citizenship or residency, you cannot complete enrollment in Part A if you are not automatically enrolled, and you cannot resolve problems with your Social Security record or work history. For those steps, you will need to call 1-800-MEDICARE or visit a local Social Security office.

The online process is fastest when your information is already in the Social Security system — meaning you have been working and paying taxes, or you are already receiving Social Security benefits. If your records are incomplete or you are signing up from outside the United States, you will need to submit documents by mail or in person.

Signing up for Part A and Part B when you turn 65

Part A (hospital insurance) is usually automatic. If you are already receiving Social Security or Railroad Retirement benefits, Medicare Part A starts the month you turn 65 with no action needed. If you are not yet receiving benefits, you need to contact Social Security to confirm you want Part A, and you can do this online through your Social Security account, by phone at 1-800-772-1213, or at a local Social Security office.

Part B (doctor and outpatient services) requires you to actively choose it. You have a seven-month enrollment window: three months before your birthday month, your birthday month itself, and three months after. If you miss this window and do not have other may have access to coverage (such as employer health insurance), you will pay a 10 percent higher premium for each year you were not enrolled. This penalty is permanent.

To enroll in Part B during your window, you can go to Medicare.gov and complete the form online, call 1-800-MEDICARE, or submit a paper form by mail. If you use Medicare.gov, you will answer questions about your situation, and the system will tell you whether you can finish online or whether you need to call or mail documents.

Signing up for Part D (prescription drug coverage)

Part D enrollment works the same way as Part B: you have a seven-month window starting three months before you turn 65, and missing it costs you. You can compare plans and enroll on Medicare.gov, by phone, or through an insurance agent.

On Medicare.gov, you can enter your medications and see which plans cover them and at what cost. This tool is useful because Part D plans vary widely — the same drug can cost $5 at one plan and $50 at another. Once you have chosen a plan, you can enroll right there on the website.

If you already have prescription drug coverage through an employer or union, you may not need Part D right away, but you should check your coverage against Medicare's minimum standard. If your coverage is weaker than Medicare's standard, you will pay a penalty if you enroll in Part D later.

Signing up for Medicare Advantage or Medigap plans

Medicare Advantage (Part C) and Medigap are different ways to get coverage beyond Original Medicare (Parts A and B). You must have Part A and Part B first, then you choose one or the other — you cannot have both at the same time.

You can compare and enroll in Medicare Advantage or Medigap plans on Medicare.gov during the annual open enrollment period (October 15 to December 7). You can also enroll when you first turn 65, as long as you are also enrolling in Part B. Outside these windows, you can enroll only if you have a may have access to life event, such as losing employer coverage or moving to a different state.

Most Medicare Advantage and Medigap plans let you enroll online through their own websites or through Medicare.gov. Some require a phone call or a paper form, so check the plan's details before you start.

What happens if you miss your enrollment window

If you miss your initial enrollment window at 65, you can still sign up during the General Enrollment Period, which runs January 1 to March 31 each year. Coverage starts July 1 of that year. However, you will pay a higher monthly premium for Part B and Part D for as long as you have Medicare — the penalty does not go away.

The Part B penalty is 10 percent of the standard premium for each full year you were not enrolled. The Part D penalty is 1 percent of the national average plan premium for each month you were not enrolled. If you wait two years to sign up for Part B, you will pay 20 percent more every month for the rest of your life.

There are a few exceptions: if you had other may have access to coverage (such as employer health insurance or TRICARE) when you turned 65, you may not owe a penalty. You will need to show proof of that coverage when you enroll. Contact Medicare at 1-800-MEDICARE to discuss your situation.

Signing up late and paying the penalty

If you are past 65 and did not enroll during your initial window, you can still sign up on Medicare.gov, by phone, or by mail during the General Enrollment Period (January 1 to March 31). You will need to provide proof that you did not have other may have access to coverage during the time you were not enrolled in Medicare.

The online process on Medicare.gov will ask you questions about your work history and coverage. If your answers show you may may have access to for an exception to the penalty, the system will tell you to call 1-800-MEDICARE to discuss it. Do not assume you owe the penalty — some people do not, and it is worth a phone call to find out.

Using an insurance agent or broker instead

You do not have to use Medicare.gov. You can also enroll through a licensed insurance agent or broker who represents Medicare plans. Agents can help you compare plans, explain your options, and submit your enrollment form. They do not charge you — they are paid by the insurance companies.

Agents are useful if you want someone to walk you through the choices, especially if you have complex medical needs or a large number of medications. You can find agents through Medicare.gov's "Find Care Providers" tool, or you can call 1-800-MEDICARE and ask for a referral.

Enrolling through an agent takes the same amount of time as enrolling on Medicare.gov, and the important date is the same. The agent will submit your form, but you are still responsible for meeting the important date — if the form arrives late, you will owe the penalty.

Frequently Asked Questions

Do I need to create a Medicare.gov account to sign up?

No. You can enroll without an account by calling 1-800-MEDICARE or mailing a paper form. A Medicare.gov account is useful if you want to compare plans online or check your coverage later, but it is not required to enroll.

Can I sign up for Medicare before I turn 65?

Yes. Your enrollment window opens three months before your birthday month. You can start on Medicare.gov as soon as that window opens, and your coverage will start the first day of your birthday month or the month after, depending on when you enroll.

What if I am still working at 65 and have employer health insurance?

You may not need to enroll in Medicare Part B right away. If your employer has 20 or more employees, your employer plan is primary and Medicare is secondary. You can delay Part B without penalty as long as you enroll within eight months of losing that coverage. Tell Medicare about your employer coverage when you enroll in Part A.

How long does it take to get a Medicare card after I sign up online?

If you enroll on Medicare.gov, you should receive your card in the mail within two weeks. If you enroll by phone or mail, it may take three to four weeks. You can view your coverage details on Medicare.gov before your card arrives.

What if I made a mistake on my enrollment form?

You can change your plan choices during the annual open enrollment period (October 15 to December 7) or if you have a may have access to life event. For other mistakes, call 1-800-MEDICARE and explain the error. They can sometimes correct it without you having to re-enroll.