調査報告
わが国における新型コロナウイルス感染症のパンデミックによる医療費への影響
―協会けんぽデータによる分析―
2022 年 16 巻 1 号 p. 59-69
詳細
2022 年 16 巻 1 号 p. 59-69
Objectives: As the pandemic started in early 2020, WHO assigned a special emergency ICD-10 code to Covid-19. Japan followed it by assigning a special code for disease classification of health insurance claims. The author analyzed health insurance claims data to estimate health care cost spent for Covid-19.
Methods: Japan Health Insurance Association (JHIA), provides aggregated claims data as open data. The JHIA data are aggregated by sex, age groups, prefectures, in/outpatient and, most importantly, disease classifications. JHIA enrolls approximately 35% of Japan's population younger than 75 years old. The author analyzed the JHIA data focusing on claims containing Covid-19 as principal diagnoses.
Results: Approximately 101 billion yen were spent for approximately 2.4 million claims containing “Covid-19” code as their principal diagnoses. When applied to the national population, approximately 390 billion yen were spent for Covid-19 in 19 months (March 2020-September 2021), slightly less than 1% of Japan's national health care expenditures.
Conclusion: Health insurance claims data may effectively be used as a supplement to the infectious diseases surveillance to monitor the utilization pattern of infected patients.
