If he has a full coverage, then he can file a claim against himself, but that may raise his premium.
The better scenario in this case would be if he has a un-insured motorist coverage, in which his insurance company will pay for his car and medical bills without raising his premium.
geez man, I am really sorry to hear that! I was in a similar accident last month, but thank God I wasn't hurt. Free bump for you, and may you recover soon!
See what your insurance can do. Also if you do have to pay a large amount, hospitals will allow you to do payments, look into a payment plan so you don't have to pay so much at once.