ICD-10-CM > I00-I99 > I30-I5A > I47 > I47.2 > I47.21 I47.21 Torsades de pointes Billable/Specific Copy Code Copy Description Code Also , if applicable, long QT syndrome (I45.81) Use Additional code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)