ICD-10 Code I47.21 – Torsades de pointes (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I47.21 – Torsades de pointes
What it is
Torsades de pointes is a specific type of polymorphic ventricular tachycardia. It is an abnormal, rapid heart rhythm that can be life-threatening and often appears related to prolonged repolarization.
Clinical signs
Clinical features vary; refer to documentation. Common findings include a polymorphic wide-complex tachycardia with a twisting QRS pattern on ECG and episodes of palpitations, dizziness, syncope, or cardiac arrest.
When to use this code
Use I47.21 when the provider documents torsades de pointes as the diagnosed arrhythmia. It may also apply when the record clearly identifies torsades as the cause of a cardiac event or monitoring finding. Check documentation for any underlying cause.
Do not use for
Do not use this code for nonspecific ventricular tachycardia, atrial arrhythmias, or QT prolongation alone. If the chart does not clearly document torsades de pointes, use the more specific documented rhythm or check documentation.
Coding tip
Verify that the provider names torsades de pointes explicitly, because ECG description alone may not be enough.