Typically, if the criminal case is still proceeding, and the defendant pleads guilty or is found guilty at trial, then at sentencing, the prosecutor in the case will ask you to turn over all your medical expenses and other damage claims resulting from the incident for the judge to consider as "restitution" for the defendant to pay. If the case has already been adjudicated, and no restitution was ordered, then your only remedy is to file a civil suit against the defendant, usually in small claims court, to seek a monetary judgement against the person for your damages. With civil suits, you can file them by yourself or hire an attorney to do so if you feel more comfortable doing so.