Maryland Code, Courts and Judicial Proceedings § 6-311

(b)(1) This section applies to an action against a person who had applicable insurance coverage under an insurance policy or self-insurance plan at the time the alleged liability that is the subject of the action was incurred.

(2) Subject to paragraph (1) of this subsection, this section applies to a person who is a defendant subject to a complaint, counterclaim, cross-claim, or third-party complaint.

(c)(1) On written request of a plaintiff to the action, an insurer or a person that has a self-insurance plan shall provide to the plaintiff the defendant's last known home and business addresses if known.

(2) An insurer or a person that has a self-insurance plan, and their employees and agents, may not be civilly or criminally liable for the disclosure of information required under this subsection.