A grandparents' medical consent form allows a parent or legal guardian to hand over all responsibility regarding their child's healthcare decisions. The New York Health Care Proxy Law allows you to appoint someone you trust — for example, a family member or close friend – to make health care decisions.This service is available Monday through Friday from 8am to 4 pm EST. I, or my authorized representative, request that health information regarding my care and treatment be released as set forth on this form: In. How to fill out the Grandparent Medical Consent Form for Minors? This consent form should be taken with the child to the hospital or physician's office when the child is taken for treatment.