My grandson was injured at birth and has Brachial Plexus/Erb's palsy. This injury affected his left arm, wrist, hand and fingers. He had surgery to restore some movement to his arm and he can now move it but is unable to straighten it or lift it above his head and it is about 4 inches shorter than his right. He cannot move his wrist or fingers which severely limit his ability to perform everyday tasks like tying his shoes,zippering or pulling up his pants, bathing himself, buttoning his shirts and he tends to lose his balance due to his left shoulder being lower than his right. His SSI application was rejected because the judge said his injury was not severe enough. Can we reapply and how severe must his injury be in order to qualify?