, (an adult into whose care the minor has been entrusted) to consent to medical treatment of. Applicants who are under the age of 18 are considered minors in the United States.Once a person reaches 18 years of age, they are considered an adult. Create a quick and hassle-free Medical Consent Form for minors with this easy-to-use template. Ensure smooth communication and authorization for medical care. This form allows a relative to enroll a child in school and get medical treatment. To order a birth certificate in person, please come to our office during normal business hours.