Where to sign up for Medicare online

You can sign up for Medicare through Medicare.gov, the official government website. Go to Medicare.gov and look for the "Sign Up" or "Enroll" button on the homepage. This takes you to the enrollment system where you enter your information and choose your coverage.

You can also create a personal account on Medicare.gov before you enroll. Having an account saves time because your name, address, and Social Security number are already filled in when you start the enrollment process. You will still need to answer questions about your income, citizenship, and current health coverage.

The online process works on desktop computers, tablets, and smartphones. You will need your Social Security number, date of birth, and citizenship information. If you have current health insurance through an employer or another source, have that information ready too — the system asks whether you are dropping existing coverage.

Key Takeaways

  • Medicare.gov is the only official online enrollment site; you cannot sign up through other websites or by phone during the general enrollment period.
  • You will need your Social Security number, date of birth, and information about any current health coverage before you start.
  • The online process takes 10 to 15 minutes if you have your documents ready, and you receive a confirmation number when ready.
  • If you miss the general enrollment period, you may face a permanent penalty on your premiums unless you have a may have access to life event.

What happens after you submit your enrollment online

After you complete the online form and submit it, Medicare sends you a confirmation number on the screen and by email. Write down or save this number — you will need it if you have questions about your enrollment later. The confirmation email also includes a summary of the coverage you chose.

Medicare processes your enrollment within 7 to 14 days. During this time, they verify your information with Social Security and check whether you meet the requirements for the parts you selected. You will receive a Medicare card in the mail once your enrollment is approved. The card usually arrives within two weeks, though it can take longer during busy periods.

Your coverage starts on the first day of the month after you enroll, unless you enroll between the 1st and 15th of a month — then coverage starts on the 1st of that same month. For example, if you enroll on March 20th, your coverage begins April 1st. If you enroll on March 10th, your coverage begins March 1st.

Enrollment periods and important date

The general enrollment period runs from January 1st through March 31st each year. During these three months, anyone who is 65 or older can sign up for Medicare online without penalty. If you miss this window, you may have to wait until the next year to enroll, and you could owe a higher premium for the rest of your life.

If you have a may have access to life event — such as losing employer health coverage, moving to a new state, or getting married — you may be able to enroll outside the general period. These special enrollment periods usually last 60 days from the date of the event. You will need to report the event when you enroll online and may need to upload documents such as a termination letter from your employer or a marriage certificate.

If you are still working and covered by an employer health plan, you may not need to enroll in Medicare right away. However, you should still sign up for Medicare Part A (hospital insurance) at 65 to avoid penalties later, even if you delay Part B (medical insurance). The online system lets you choose which parts to enroll in.

Choosing between Original Medicare and Medicare Advantage online

When you enroll online, you decide whether you want Original Medicare (Part A and Part B) or a Medicare Advantage plan (Part C). Original Medicare is run by the federal government and covers hospital stays, doctor visits, and some other services. Medicare Advantage is offered by private insurance companies and usually includes prescription drug coverage, but has networks of doctors and hospitals you must use.

The Medicare.gov enrollment form shows you plans available in your area with their costs and coverage details. You can compare plans side by side before you choose. If you pick Original Medicare, you can also add a Medigap policy (supplemental insurance) or a prescription drug plan (Part D) during enrollment or within 63 days afterward.

If you choose a Medicare Advantage plan online, your enrollment in that plan is final. You cannot switch to Original Medicare until the next general enrollment period unless you have a may have access to life event. Original Medicare does not have this restriction — you can switch between Original Medicare and Medicare Advantage during the general enrollment period each year.

Adding prescription drug coverage during online enrollment

If you choose Original Medicare, you can add Part D prescription drug coverage at the same time you enroll online. The enrollment form shows you the drug plans available in your area. You can search for your medications to see which plans cover them and at what cost.

If you do not add Part D when you first enroll in Medicare, you can still add it later, but you may owe a penalty if you wait. The penalty is 1% of the national average Part D premium for each month you were may be able to access but did not enroll. This penalty stays on your premiums for as long as you have Part D coverage.

Medicare Advantage plans usually include prescription drug coverage already, so you do not choose a separate Part D plan if you pick Medicare Advantage. The coverage details are shown in the plan information when you compare options online.

Troubleshooting common online enrollment problems

If you cannot log into Medicare.gov, check that you are using the correct username and password. If you forgot your password, click "Forgot Username or Password" on the login page and follow the steps to reset it. You will need access to the email address or phone number you used when you created your account.

If the system says your Social Security number does not match their records, double-check that you entered it correctly. If you recently changed your name or address with Social Security, that information may not have updated in the Medicare system yet. You can call Social Security at 1-800-772-1213 to confirm your information is correct, or you can complete your enrollment by phone with Medicare instead.

If you get an error message saying you are not yet 65, check your birth date. Medicare enrollment opens three months before you turn 65. If your birthday is in April, you can enroll starting in January. If the system still will not let you proceed, call Medicare at 1-800-MEDICARE (1-800-633-4227) and they can help you enroll over the phone.

Enrolling by phone or in person if online does not work

If you cannot enroll online or prefer not to, you can call Medicare at 1-800-MEDICARE (1-800-633-4227). Representatives are available Monday through Friday, 8 a.m. to 8 p.m. Eastern time. They will ask you the same questions as the online form and can complete your enrollment over the phone. You will receive a confirmation number at the end of the call.

You can also visit your local Social Security office to enroll in Medicare in person. Bring your Social Security card, birth certificate, and proof of citizenship (such as a passport or driver's license). Staff can help you fill out the enrollment form and answer questions about your options. Social Security offices are open Monday through Friday during regular business hours.

Some community centers, senior centers, and libraries also offer free help with Medicare enrollment. These sites often have trained counselors who can walk you through the online process on a computer. Call your local Area Agency on Aging to find enrollment help near you.

Frequently Asked Questions

Can I change my mind after I enroll online?

Yes, but only during certain times. If you enroll in Original Medicare, you have until March 31st of the year after you first enroll to switch to a Medicare Advantage plan. If you enroll in Medicare Advantage, you have until March 31st to switch to Original Medicare or to a different Medicare Advantage plan. Outside these windows, you can only change plans if you have a may have access to life event.

Do I need to upload documents when I enroll online?

Usually not. The online system verifies your information automatically through Social Security and the IRS. However, if you are claiming a may have access to life event to enroll outside the general period, you may need to upload documents such as a job termination letter or marriage certificate. The system will tell you if documents are needed before you submit your enrollment.

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

You can enroll in Medicare online if you are a lawful permanent resident (green card holder) who has lived in the United States for at least five years. You will need to provide your green card number during enrollment. If you are not a permanent resident, you cannot enroll in Medicare, but you may have other coverage options.

Can I enroll in Medicare before I turn 65?

You can start the enrollment process three months before you turn 65, but your coverage will not start until the month you turn 65 or later. For example, if your birthday is in June, you can enroll starting in March, and your coverage will begin in June. You cannot enroll before the three-month window opens.

Is there a fee to enroll online?

No. Enrolling on Medicare.gov is free. However, once your coverage starts, you will pay premiums for the parts you chose. Part A has no premium for most people, but Part B, Part D, and Medicare Advantage plans all have monthly costs that vary by plan and your income.