Md. 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.