What documents do I need to enroll in Medicare?
The short answer
To enroll in Medicare, you'll generally need your Social Security number, proof of U.S. citizenship or legal residency, and your birth certificate or other proof of age. If you're enrolling based on disability or other special circumstances, additional documents may be required.
The full explanation
For most people, enrolling in Medicare is simpler than expected. If you're already receiving Social Security benefits when you turn 65, you'll be enrolled in Parts A and B automatically and your Medicare card will arrive in the mail. You don't need to gather documents or fill out forms. If you're not yet taking Social Security, you'll need to sign up actively, either online at ssa.gov, by phone, or at a Social Security office. In that case, have your Social Security number ready, along with proof of age like a birth certificate or passport, and proof of U.S. citizenship or lawful permanent residency. If you're enrolling because of a disability or end-stage renal disease, the process has additional steps and Social Security will tell you what documentation they need. If you're enrolling in a Medicare Advantage or Part D plan through a private insurer after getting your Medicare number, the insurer typically just needs your Medicare Beneficiary Identifier, which is the ID number on your red, white, and blue Medicare card. Keep that card somewhere safe.
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