Korea has gained the much more performances in the fields of pubic health laws and related policies on the basis of the substantial economic achievements. In 1977, the social medical insurance was established for companies with more than 500 employees, and in 1989, Korea successfully achieved the national medical insurance system covering the total population within only 12 years beginning with multiple insurers. There remained some problems, however, to be improved such as both the low level of contribution rates and benefit packages due to the inefficiency in utilizing limited medical resources. In 2000, all insurers were unified into a single insurer (National Health Insurance Corporation), and special independent Health Insurance Review & Assessment Service (HIRA) was also established. From the origin of medical insurance system in 1977, the Korean reimbursement system has been fee-for-service system, and after the establishment of HIRA, it has been providing objective and expert medical cost review services and health quality assessment services.