Md. Code, Courts and Judicial Proceedings § 5–608

An individual is not civilly liable for any act or omission while providing support to the emergency medical system by giving care, equipment, facilities, or consultation, if:

(1) The individual is a member or employee of any federal, State, county, or city government, hospital, emergency medical service council, or agency that operates as a nonprofit group;

(2) The act or omission is not one of gross negligence; and

(3) The service is provided without fee to the emergency victim.