Maryland Health - General Section 24-907
§ 24-907.
  (a)   (1)   Each Program participant shall be issued an identification card with an identification number.
    (2)   The identification number shall be cross-indexed to a confidential record containing pertinent data on the participant.
  (b)   Any information obtained by the Program that would identify Program participants, including Program records, is:
    (1)   Confidential;
    (2)   Not open to public inspection or disclosure; and
    (3)   Not discoverable in any criminal or civil proceeding.
  (c)   (1)   Notwithstanding the provisions of subsection (b) of this section, on the written consent of a Program participant, information obtained by the Program that identifies the Program participant may be released or disclosed to a person or agency participating in the Program.
    (2)   In addition to the provisions of paragraph (1) of this subsection, if a Program participant raises the issue of participation in the Program either as a subject matter or legal defense in an administrative, civil, or criminal proceeding, the Program participant waives the confidentiality as to identity provided under subsection (b)(1) of this section.