In order to qualify for Medicare, children must meet certain relationship requirements with you, their parent or guardian. The child must be related to you by birth or legal adoption. If the child has been your stepchild for one year or more, they may also qualify for coverage. In addition, you have to have received Medicare credits through your work in past years. If your child is over 20 years of age , they must be disable d and have been receiving disability benefits from the social security administration for at least two year s before applying for Medicare. Even if your child has never worked, they can still get Medicare coverage because of their disability. The child must have been disabled before reaching age 22. Adult children who qualif y for Medicare will remain entitled to benefits as long as they r emain disabled and remain unmarried. Adult children who are disabled but may still be capable of working will g...