Applying for Medicare is simpler than most people expect, but the process looks a little different depending on whether you are already receiving Social Security benefits, still working, or approaching 65 for the first time. This guide walks through exactly how to apply, what to have ready, and what happens after you submit your application.
Confirm whether you're enrolled automatically
If you already receive Social Security or Railroad Retirement Board benefits, you are typically enrolled automatically in Medicare Part A and Part B the month you turn 65, and your Medicare card arrives in the mail a few months beforehand. If you are not yet receiving those benefits, you will need to apply yourself — this applies to most people who are still working past 65 or who haven't started Social Security.
Apply online, by phone, or in person
The fastest way to apply is through the Social Security Administration's online application at ssa.gov, which usually takes less than 10 minutes. You can also apply by calling Social Security at 1-800-772-1213, or by visiting a local Social Security office in person. All three paths lead to the same enrollment — choose whichever is easiest for you.
Gather what you'll need before you start
Have your Social Security number, date and place of birth, and information about your current or most recent employer on hand. If you're applying for Part B outside your Initial Enrollment Period because of employer coverage, you'll also need your employer to complete a form confirming your coverage dates.
Know your enrollment window
Most people apply during their seven-month Initial Enrollment Period, which starts three months before the month you turn 65 and ends three months after. Missing this window without qualifying employer coverage can mean a late-enrollment penalty added to your Part B premium for as long as you have Medicare, so it's worth applying early rather than waiting until your birthday month.
What happens after you apply
Most online applications are processed within a few weeks. You'll receive a decision letter and, once approved, your Medicare card in the mail. If you want to add a Medicare Advantage plan, a Medicare Supplement policy, or a standalone Part D prescription drug plan, that's a separate enrollment step you can take once your Part A and Part B coverage is confirmed — a licensed local agent can help you compare those options once you have your Medicare number in hand.
Frequently asked questions
Can I apply for Medicare before I turn 65?
Yes. You can apply up to three months before your birthday month as part of your Initial Enrollment Period, and doing so early helps your coverage start on time.
Do I have to apply for Medicare Part B if I have employer coverage?
Not necessarily, depending on your employer's size and your current employment status. Confirm your specific situation with your employer's benefits administrator and Social Security before delaying Part B.
How long does it take to hear back after applying?
Online applications are typically processed within a few weeks, though processing times can vary. You'll receive written confirmation once a decision is made.
Does applying for Medicare automatically enroll me in a Medicare Advantage or Part D plan?
No. Applying through Social Security only enrolls you in Original Medicare (Part A and Part B). Medicare Advantage, Medicare Supplement, and Part D plans require a separate enrollment, usually through a private insurance company or licensed agent.
Find local Medicare help
Ready to speak with someone nearby? Browse the Agents by State directory (medicareagentshelpline.com/search/agents-by-state) or explore more educational resources in the Insurance Blog (medicareagentshelpline.com/insurance-blog).
Important Medicare information
Medicare Agents Helpline is not affiliated with the U.S. government or the federal Medicare program. Agents may not offer every plan available in your area. For information about all of your options, visit Medicare.gov or call 1-800-MEDICARE.
