Traditional Korean medicine (TKM) is formally integrated into the Korean national health system and monitored through the systematic and computerized system, which could grasp the whole medical services utilization in Korea. This study analyzed TKM resources as input and utilization as output using data from 2008–2017 and compared them to Conventional Medicine (CM). As a result, 25.4% of Koreans utilized TKM yearly, and the proportion of TKM medical expenditure (ME) to total ME in national health insurance was around 4% between 2008 to 2017. The proportion of ME has been stagnating or decreasing over the past ten years. Primary users are the elderly, women, and patients with musculoskeletal diseases. The Korean Ministry of health and welfare has also developed and operated programs that have taken advantage of the strengths of TKM. This study analyzes the current status of TKM in Korea comparing with that of CM. It also explores how and why the patterns of TKM and CM are different. Although the study focuses on input and output indicators, it also highlights the challenge of evaluating whether these lead to outcomes. Lastly, it seeks to inform relevant authorities of the importance of monitoring roles and evidence-informed policymaking.