When an individual lacks legal capacity to execute powers of attorney, it will be necessary for a guardian to be appointed to that person. Upon reaching the age of 18, all persons, without regard to the extent of their disability, are considered adults and are legally responsible for making their own decisions. This means that parents won’t be able to rely on their position as mom or dad to be able to make decisions for their child. Doctors offices, hospitals, psychiatrists, and other medical providers are not allowed to discuss health care matters with parents of a child who is 18 or older unless that child has authorized the parent .