The driver’s insurance carrier will not pay your bills until after the injured party has completed any medical treatment. If the pedestrian has health insurance, they can use that to pay their medical bills, and if they recover compensation later, it can be used to cover those bills. Take note that the health insurance company is likely to want to be paid back.
If the pedestrian does not have health insurance, then pedestrian lawyers will help get the bills paid via an attorney’s lien, which is an agreement between the attorney and the healthcare provider whereby the healthcare company agrees to treat the patient at no charge now, and they will then be compensated out of the pedestrian’s award when a settlement is negotiated, or a trial is won.