Objectives: For domestic medical treatment, a medical treatment code according to medical treatment is submitted to the Health Insurance Review and Assessment Service to claim the number of insurance benefit items, and the Health Insurance Review and Assessment Service discloses these billing data to the Healthcare Big Data Hub. Based on this actual insurance fee claim data, we analyzed dialysis-related treatment behavior to find out the recent changes in dialysis-related treatment behavior. Methods: Using the health care data system, changes in dialysis-related treatment practices over the past five years (2006-2010) were analyzed. Dialysis-related treatments such as hemodialysis, peritoneal dialysis, arteriovenous fistula surgery, and peritoneal dialysis catheter insertion were analyzed using insurance EDI(electronic data interchange) codes listed in the cost of health insurance care benefits. Results: Peritoneal dialysis catheter surgeries behavior gradually decreased from 2,035 cases in 2006 to 1,404 cases in 2020. The number of arteriovenous fistula surgeries using autologous blood vessels gradually increased from 7,141 cases in 2016 to 8,817 cases in 2020. Arteriovenos fisula surgeries using artificial blood vessels increased from 3,221 cases in 2016 to 3,342 cases in 2019 and then decreased to 3,275 cases in 2020. Conclusions: The data on the claim code of the Health Insurance Review and Assessment Service can be considered to be accurate as it was actually implemented as a medical practice. In the past five years, the number of peritoneal dialysis surgeries has been gradually decreasing, and arteriovenous fistula surgery for hemodialysis is increasing, and based on these results, it is thought that there should be a change in healthcare policy for dialysis-related treatment.