The Claim Database in Japan

Based on the Fee-For-Service tariff system, Japan has developed the National Database (NDB) that registers all health care insurance claims. Compared with the similar databases of other countries, NDB has more detailed data, i.e., insurer’s code, insured ID number, diagnoses, age, sex, date of consultation for out-patient service, date of admission, date of discharge, procedures and drugs provided with information of date, volume and tariff....