After a car accident, you must get medical treatment within 14 days for your injuries to be eligible for PIP coverage.
Your lawyer will prepare the claim an all supporting documents. Contacting a lawyer is important because insurance companies are trying to settle as fast as they can and do not have your best interest at heart.
You will need to prove that your injuries stemmed from the car accident for a PIP claim. If you need to file a fault-based claim, you will need to prove both your injuries and liability for the crash.