Md. Code, Insurance § 15–858

(a) (1) This section applies to:

(i) insurers and nonprofit health service plans that provide coverage for prescription drugs under individual, group, or blanket health insurance policies or contracts that are issued or delivered in the State; and

(ii) health maintenance organizations that provide coverage for prescription drugs under individual or group contracts that are issued or delivered in the State.

(2) An insurer, a nonprofit health service plan, or a health maintenance organization that provides coverage for prescription drugs through a pharmacy benefits manager is subject to the requirements of this section.

(b) An entity subject to this section may not apply a prior authorization requirement for a prescription drug used as postexposure prophylaxis for the prevention of HIV if the prescription drug is prescribed for use in accordance with Centers for Disease Control and Prevention guidelines.