Maryland Code, Courts and Judicial Proceedings § 11-301

(a) In an action for bodily injury arising from the operation of a motor vehicle in which a money judgment is entered in favor of the plaintiff, the court may assess interest against the defendant at the rate of not more than 10 percent per annum on the amount of judgment from a time not earlier than the time the action was filed if it finds that the defendant caused unnecessary delay in having the action ready or set for trial.

(b) For the purposes of this section, a delay caused by the defendant's insurer or counsel is deemed an unnecessary delay caused by the defendant.