Generally, there are three different types of insurance that come into play in an auto accident case. The first is the other driver's insurance. That's primary insurance, meaning that his or her insurance is responsible for making you whole again.
The second type of insurance is your car insurance. That comes into play with personal injury protection or med pay, depending on what state you're in, as well as uninsured or underinsured insurance, which would be used if you were hit by somebody who was uninsured or didn't have enough insurance. Finally, oftentimes you can use your medical insurance in a case.
It's important that you contact an attorney to make sure you maximize all the benefits you have available to you.