This article aims to describe the training and medical licensing system (uieop) for becoming a physician officer (uigwan) during Korea’s Goryeo Dynasty (918-1392). In the Goryeo Dynasty, although no license was necessary to provide medical services to the common people, there was a licensing examination to become a physician officer. No other national licensing system for healthcare professionals existed in Korea at that time. The medical licensing examination was administered beginning in 958. Physician officers who passed the medical licensing examination worked in two main healthcare institutions: the Government Hospital (Taeuigam) and Pharmacy for the King (Sangyakguk). The promotion and expansion of medical education differed depending on the historical period. Until the reign of King Munjong (1046-1083), medical education as a path to licensure was encouraged in order to increase the number of physician officers qualifying for licensure by examination; thus, the number of applicants sitting for the examination increased. However, in the late Goryeo Dynasty, after the officer class of the local authorities (hyangri) showed a tendency to monopolize the examination, the Goryeo government limited the examination applications by this group. The medical licensing examination was divided into two parts: medicine and ‘feeling the pulse and acupuncture’ (jugeumeop). The Goryeo Dynasty followed the Chinese Dang Dynasty’s medical system while also taking a strong interest in the Chinese Song Dynasty’s ideas about medicine.