I'm not sure which state you are in and I'm only licensed in N.Y., however, I can give you some general information. Where you are involved with a hit and run vehicle, you may be able to bring an uninsured motorist claim against the vehicle's policy in which you were a passenger and possibly your own motor vehicle policy. It's best to put all possible insurance carriers on notice of the accident and your intention of bringing an un/underinsured motorist claim.
Since certain policy conditions such as the reporting of the accident within 24 hours to the police and a statement under oath may be required, it is best to speak with a personal injury attorney in your jurisdiction as soon as possible.