Maryland Code, Health-General § 2-1004

(a) This section does not prohibit a person that is licensed or otherwise regulated by the Department or a unit of the Department from refusing, withholding from, or denying any person services for failure to conform to the usual and regular requirements, standards, and regulations imposed by the licensed or regulated person, unless the refusal, withholding, or denial is based on discrimination on the grounds of race, color, religion, sex, age, national origin, marital status, sexual orientation, gender identity, or disability.

(b) A person that is licensed or otherwise regulated by the Department or a unit in the Department may not discriminate against any person because of the person's race, color, religion, sex, age, national origin, marital status, sexual orientation, gender identity, or disability.