When and how to sign up for Medicare

You can sign up for Medicare starting three months before the month you turn 65. The Social Security Administration handles the enrollment, and you have seven months total to register — three months before, the month you turn 65, and three months after. If you miss this window, you may pay a penalty for the rest of your life, so timing matters.

Most people sign up through Social Security directly. You can do this online at ssa.gov, by phone at 1-800-772-1213, or in person at your local Social Security office. You will need your birth certificate, proof of citizenship or legal residency, and your bank account information if you want direct deposit.

If you are already receiving Social Security benefits, you are usually signed up for Medicare automatically three months before you turn 65. You do not need to do anything. If you are not yet receiving Social Security, you must contact Social Security yourself to enroll in Medicare.

Key Takeaways

  • You can sign up for Medicare three months before you turn 65, and you have until three months after your birthday to do so without penalty.
  • Contact Social Security through their website at ssa.gov, by phone at 1-800-772-1213, or at your local office to enroll.
  • If you are already getting Social Security checks, Medicare enrollment happens automatically and you will receive your card in the mail.
  • Missing the enrollment window can result in a permanent penalty added to your Part B and Part D premiums.
  • You will need your birth certificate, proof of citizenship or legal residency, and bank details for direct deposit.

What documents to gather before you contact Social Security

Have these documents ready when you call or visit Social Security. You will need your original or certified birth certificate. If you were born outside the United States, bring your passport, naturalization papers, or green card showing your legal status.

You will also need proof of your current address — a recent utility bill, lease, or mortgage statement works. If you want your Medicare card mailed to you and your benefits deposited directly to your bank account, have your routing number and account number ready. Social Security can set up direct deposit on the phone, which is faster than waiting for paper checks.

Signing up online versus by phone or in person

The online route through ssa.gov is available 24 hours and you can work at your own pace. You create a Social Security account, answer questions about your work history and citizenship, and submit your information. You will upload photos of your documents or mail them in. Processing usually takes two to four weeks.

Calling 1-800-772-1213 is faster if you have questions or need help. A representative can walk you through the process, answer questions about your specific situation, and tell you what documents to expect. Wait times are longest early in the morning and on Mondays. Calling from a quiet place where you can take notes helps.

Visiting your local Social Security office in person is an option if you prefer face-to-face help or have complex circumstances. You can find your nearest office at ssa.gov/locator. Bring all your documents with you. Many offices now ask you to schedule an appointment online rather than walk in, so check ahead.

What happens after you sign up

Social Security will send you a Medicare card in the mail within two to four weeks of enrollment. Your card shows your Medicare number, which you will use to access your benefits. Keep this card in a safe place — you will need it when you see a doctor or fill a prescription.

Your Medicare coverage starts on the first day of the month you turn 65, even if your card arrives later. You do not have to wait for the physical card to use your benefits. If your card does not arrive within four weeks, call Medicare at 1-800-633-4227 to request a replacement.

After enrollment, you will receive information about your coverage choices. Part A (hospital insurance) and Part B (medical insurance) are automatic, but you can choose whether to enroll in Part D (prescription drug coverage) and whether to add supplemental coverage. These choices have their own important date, usually within a few months of turning 65.

What to do if you miss the initial enrollment window

If you turn 65 and do not sign up within the seven-month window, you can still enroll, but you may owe a penalty. For Part B, the penalty is 10 percent of the standard premium for each full year you delayed. For Part D, the penalty is 1 percent of the national average premium for each month you were without coverage. These penalties stay on your bill permanently.

You can enroll during the General Enrollment Period, which runs January 1 through March 31 each year. Coverage would start July 1 of that year. If you have a may have access to life event — such as losing employer coverage or moving to a new state — you may be able to enroll outside these windows without penalty. Contact Medicare at 1-800-633-4227 to ask about your situation.

Special situations: Still working or covered by an employer plan

If you are still working and your employer offers health insurance, you may not need to sign up for Part B right away. You can delay Part B without penalty as long as you are covered by an active employer plan and you are still working. However, you should still enroll in Part A (hospital insurance) at 65, since it is rarely covered by employer plans.

When you leave your job or lose employer coverage, you have eight months to sign up for Part B without penalty. This is called a Special Enrollment Period. Keep documentation of your employer coverage and the date it ended, because Medicare will ask for proof. If you are unsure whether your plan qualifies, call your employer's benefits office or Medicare at 1-800-633-4227.

Frequently Asked Questions

Can I sign up for Medicare before I turn 65?

You can start the process three months before your 65th birthday, but your coverage will not begin until the first day of the month you turn 65. Signing up early gives you time to receive your card and understand your coverage before it starts.

What if I do not have a birth certificate?

Contact your state's vital records office to request a certified copy — this usually costs $10 to $30 and takes one to two weeks. If you were born outside the United States, your passport or naturalization papers work instead. Social Security can tell you which documents they will accept for your situation.

Do I have to sign up for Part B if I am still working?

No. If your employer has 20 or more employees and you are covered by their health plan, you can delay Part B without penalty. You must sign up within eight months of leaving your job or losing coverage. Part A (hospital insurance) should still be enrolled at 65.

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

Most cards arrive within two to four weeks. Your coverage starts on the first day of the month you turn 65, even if the card has not arrived yet. If you need your number before the card comes, Social Security can give it to you over the phone.

What if I enrolled but never received my card?

Call Medicare at 1-800-633-4227 to request a replacement. Have your Social Security number ready. They can mail a new card or, in some cases, provide your Medicare number over the phone so you can use it when ready.