I had an accident last year with my carbon bike - different situation as it was on a trunk rack and I was hit from behind while at a red light at a fairly low speed. On the surface, it just looked like the front wheel was damaged. I brought it to my LBS and the mechanic recommended replacing the fork, too, just to be sure as it can be difficult to discern underlying damage. I submitted the claim to the other party's insurance company for both the wheel and the fork and they paid the claim. Best to have a full assessment of your bike done without letting time pass from the accident.