Maryland Code, Estates and Trusts § 8-101

(a) Except as provided in § 8-104 of this subtitle, a proceeding to enforce a claim against an estate of a decedent may not be revived or commenced before the appointment of a personal representative.

(b) After appointment and until the estate is closed, the procedures prescribed by § 8-104 of this subtitle shall be followed.

(c) After the estate is closed, a creditor whose claim has not been barred may recover directly from the persons to whom property has been distributed as provided in § 10-102 of this article, or from a former personal representative individually as provided in § 10-103 of this article.