Anomalous portal venous connection

This code describes a congenital malformation where the portal vein, which normally carries blood from the gastrointestinal tract and spleen to the liver, connects abnormally to another vessel or organ. This can result in shunting of portal blood away from the liver, potentially leading to hepatic dysfunction or systemic complications.

Apply this code when documentation confirms a congenital anomaly of the portal venous system, such as a portosystemic shunt or an anomalous drainage into the systemic circulation. This diagnosis is often made through imaging studies like ultrasound, CT, or MRI, or during surgical exploration.

• Ensure documentation specifies a congenital anomaly of the portal venous connection, not an acquired condition.
• Distinguish from portal vein thrombosis or stenosis, which are coded differently.
• Code any associated liver dysfunction or other systemic complications separately.