TABLE 1. Open data of cranioplasty from Healthcare Bigdata Hub which is provided from Health Insurance Review and Assessment Service, Republic of Korea. Cranioplastys for craniosynostosis are excluded. Code N0341 means simple cranioplasty limited in skull, N0342 means cranioplasty including duroplasty, N0346 means relatively simple cranioplasty and N0347 means relatively complex cranioplasty. Surgical fee was increased with phase-out of the selective medical fee in 2014 Jul in Repubic of Korea.