Common arterial trunk

This code represents a severe congenital heart defect where a single large arterial vessel, instead of a separate aorta and pulmonary artery, arises from both ventricles of the heart. This common trunk then supplies blood to the systemic, pulmonary, and coronary circulations. It is often associated with a large ventricular septal defect.

Assign this code when documentation clearly indicates the presence of a common arterial trunk, also known as truncus arteriosus. This diagnosis is typically made prenatally or shortly after birth based on echocardiography findings. Use this code for the primary diagnosis of this specific congenital anomaly.

• Differentiate from other complex congenital heart defects; specifically note the "Excludes1" for aortic septal defect.
• Ensure documentation specifies a single great artery arising from the heart, not just a connection between the aorta and pulmonary artery.
• Code any associated congenital anomalies, such as a ventricular septal defect, separately if documented.