A grandparents' medical consent form allows a parent or legal guardian to hand over all responsibility regarding their child's healthcare decisions. This policy outlines consent for medical treatment and identification of a surrogate decision- maker to consent to treatment.How to fill out the Grandparent Medical Consent Form for Minors? Yes. Usually there is no issue with a grandparent taking a child to the doctor. Download a free Medical Consent Form for Babysitter. Streamline how patients authorize medical treatment and procedures with our Medical Consent Form for Adults template.