Table 4. Data related to Diagnosis Procedure Combination (DPC).

File	Description	Item
Form 1	Patient clinical information	Basic patient information (date of birth, sex), postal code of patient address area, dates of admission and discharge, route of hospital admission, outcome at discharge, diseases/injuries name, surgical procedure, various clinical scores, cancer stage classification, etc
D-file	Medical treatment information (Reimbursement information for DPC/PDPS)	Medical charges, implementation date and number of times/quantity of medical treatment (surgery, treatment, test, etc), pharmaceuticals, medical materials, etc
EF-file	Medical treatment information (Reimbursement information for fee-for-service payment)	Medical charges, implementation date and number of times/quantity of medical treatment (surgery, treatment, test, etc), pharmaceuticals, medical materials, etc
H-file	Daily anonymization information from medical records etc	Scores for each evaluation item on the evaluation sheet for severity of a patient’s condition and extent of a patient’s need for medical/nursing care
Form 3	Facility information	Number of beds, medical safety measures, infection prevention measures, etc
Form 4	Information on the patients who have received medical treatment not covered by public health insurance	Payment source information for hospitalization medical charge, etc
K-file	Encrypted file able to conduct coupling analysis of the other database	Primary common ID (generated based on date of birth, name spelled in kana, and sex), date of admission, date of discharge, implementation date of medical treatment, medical institution, etc

DPC/PDPS, DPC-based Per-Diem Payment System.