426 Conduction disorders 
426.0 Atrioventricular block complete convert 426.0 to ICD-10-CM 426.1 Atrioventricular block other and unspecified 
426.10 Atrioventricular block unspecified convert 426.10 to ICD-10-CM 426.11 First degree atrioventricular block convert 426.11 to ICD-10-CM 426.12 Mobitz (type) ii atrioventricular block convert 426.12 to ICD-10-CM
426.13 Other second degree atrioventricular block convert 426.13 to ICD-10-CM 426.2 Left bundle branch hemiblock convert 426.2 to ICD-10-CM 426.3 Other left bundle branch block convert 426.3 to ICD-10-CM 426.4 Right bundle branch block convert 426.4 to ICD-10-CM 426.5 Bundle branch block other and unspecified 426.50 Bundle branch block unspecified convert 426.50 to ICD-10-CM 426.51 Right bundle branch block and left posterior fascicular block convert 426.51 to ICD-10-CM 426.52 Right bundle branch block and left anterior fascicular block convert 426.52 to ICD-10-CM 426.53 Other bilateral bundle branch block convert 426.53 to ICD-10-CM 426.54 Trifascicular block convert 426.54 to ICD-10-CM 426.6 Other heart block convert 426.6 to ICD-10-CM 426.7 Anomalous atrioventricular excitation convert 426.7 to ICD-10-CM 426.8 Other specified conduction disorders 426.81 Lown-ganong-levine syndrome convert 426.81 to ICD-10-CM 426.82 Long qt syndrome convert 426.82 to ICD-10-CM 426.89 Other specified conduction disorders convert 426.89 to ICD-10-CM 426.9 Conduction disorder unspecified convert 426.9 to ICD-10-CM