Each health plan offered to public employees and their covered dependents under this chapter that is not subject to the provisions of Title 48 RCW and is established or renewed after January 1, 1990, and that provides benefits for hospital or medical care shall provide benefits for screening or diagnostic mammography services, provided that such services are delivered upon the recommendation of the patient’s physician or advanced registered nurse practitioner as authorized by the nursing care quality assurance commission pursuant to chapter 18.79 RCW or physician assistant pursuant to chapter 18.71A RCW.