Maryland Code, Insurance § 9-203

(1) has done, purports to do, is doing, or is licensed to do an insurance business; and

(2) is subject to the insurance supervisory authority of, or to liquidation, rehabilitation, reorganization, or conservation by, the Commissioner or equivalent insurance supervisory official of another state.

(1) a corporation that operates a nonprofit health service plan under Title 14, Subtitle 1 of this article;

(2) an insurer that is doing or has done insurance business in the State and against whom claims arising from that insurance business may exist now or in the future;

(3) a person that purports to do insurance business in the State;

(4) an insurer that has an insured resident or located in the State;

(5) a person organized or in the process of organizing with intent to do insurance business in the State; and

(6) a person that does, or has done, any of the acts of an insurance business specified in § 4-205 of this article.