When you are injured in a car accident, the insurance company for the party who caused the accident will be responsible for paying for the medical bills that you incur as a result of your accident.
If you are at fault in your accident, your insurance company will pay. If you are partially at fault then the medical bills will paid proportionally based on the percentage of fault.
Payment of medical bills when you are making a third party claim against a negligent driver can become very complicated. This is why it is crucial to let your health care providers know that you are seeking treatment for injuries from a car accident. Even when you do properly notify the doctor, sometimes bills will be sent to you, or to the wrong insurance company (including your health insurance). In these situations, your attorney can help to sort out your medical bills and make sure they are paid by the proper insurance company.