Arizona has a statute of limitations for personal injury claims, including those involving allegations of medical errors. Under A.R.S. § 12-542, you must file your claim no later than two years after the date of your injury. However, the statute of limitations will not begin to run until you learn of your injury or should have known that you were injured because of the negligence. However, if the injured victim is a minor, the statute of limitations will not begin to run until the minor reaches age 18 under A.R.S. § 12-502. If you fail to file your lawsuit within the limitations period, your claim will be time-barred.