Validation of diagnostic codes for outpatient‐originating sudden cardiac death and ventricular arrhythmia in Medicaid and Medicare claims data

Abstract

First-listed SD/VA diagnostic codes identified in inpatient or emergency department encounters had very good agreement with clinical diagnoses and functioned well to identify outpatient-originating events. Researchers using such codes can be confident of the PPV when conducting studies of SD/VA originating in the outpatient setting.