Portal vein thrombosis

This code represents the formation of a blood clot within the portal vein, which carries blood from the gastrointestinal tract, spleen, and pancreas to the liver. This obstruction can impair blood flow to the liver and lead to portal hypertension.

Use this code when documentation clearly indicates a diagnosis of portal vein thrombosis, whether acute or chronic. Supporting documentation typically includes imaging reports (e.g., ultrasound, CT, MRI) confirming the presence of a thrombus in the portal vein, along with clinical signs and symptoms.

• Do not use this code for thrombosis of other hepatic veins (e.g., Budd-Chiari syndrome).
• Specify any underlying cause of the thrombosis if known and documented (e.g., malignancy, cirrhosis).
• Consider sequencing this code as a secondary diagnosis if the portal vein thrombosis is a complication of another primary condition.