Maryland Health - General Section 20-703
§ 20-703.
  (a)   A physician, pharmacist, dentist, or nurse who treats an individual for an injury that was caused or shows evidence of having been caused by a gunshot of any type, or the individual in charge of a hospital that treats the injured individual, shall notify the county sheriff, the county police, or the Department of State Police of the injury as soon as practicable.
  (b)   A report of injury shall include:
    (1)   The injured individual's name and address, if known;
    (2)   A description of the injury; and
    (3)   Any other facts concerning the matter that might assist in detecting crime.
  (c)   A person who fails to make a report required by this section is guilty of a misdemeanor and on conviction is subject to a fine not exceeding $25.