A person who is licensed to practice medicine in this State or the professional legal entity of which the person is a shareholder, partner, employee, or owner, may submit a bill for outpatient anatomic pathology services only to:

(1) the patient directly;

(2) the responsible insurer or other third-party payor;

(3) the hospital, public health clinic, or nonprofit health clinic; or

(4) the referral laboratory or the primary laboratory.