Are you talking about Medicare, or do you mean Medicaid? Medicare is typically for retired adults or older adults. Medicaid is what "younger" people are sometimes eligible for. You can see the eligibility requirements here: Are You Eligible? Medicaid Eligibility. I've read online that if you qualify for medicaid, it doesn't necessarily mean you'll qualify for braces coverage. I think it has to be a pretty serious medical need for them for it to be covered. Cosmetic reasons aren't covered. You should consult a medicaid office to find out for sure though.