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, potentially leading to portal hypertension and liver dysfunction.

Use this code when documentation explicitly states a diagnosis of portal vein thrombosis. This often occurs in patients with underlying liver disease, hypercoagulable states, or abdominal infections. Supporting documentation should include imaging reports (e.g., ultrasound, CT, MRI) confirming the thrombus.

• Differentiate from phlebitis of the portal vein (K75.1), which indicates inflammation rather than a clot.
• Do not use for hepatic vein thrombosis (Budd-Chiari syndrome), which is coded to I82.0.
• Look for documentation of acute versus chronic presentation, as this may impact associated conditions or treatment.