I am a lawyer in CT and practice in this area of the law. Your son has a serious and permanent injury. i suggest that you obtain a lawyer immediately to take pictures of the scar and file a lawsuit against the at fault driver. you will be able to recover up to the amount of the at fault drvier's insurance policy, plus any amount of underinsurance that your son has on his insurance policy. most lawyers will meet with you for free the first time. your son deserves more than 1K.