An Insurance term, referring to a program intended to reduce unnecessary health costs, by controlling the delivery systems and regulating the providers of healthcare via systems such as the gatekeepers. The term “networks” of insurance typically referred to managed-care organizations or MCO’s, and these networks may be closed to certain types of providers.managed-care networks are often criticized of limiting complementary or alternative care CAM. Chiropractic organizations typically lobby for inclusion more inclusion in NCOs.