16, unless child
Wants parent there or child is globally, emotionally or mentally delayed.
In which case, child may never be old enough to see the doctor alone. Some 13 - 16-year-olds are adamant about not having parents join them in the office. For instance if child has genital or gender issues, in which case parents need to speak to the dr. Both before or after leaving jack or jill alone with dr. Or dr. + nurse.