ICD-10 Code I82.0 – Budd-Chiari syndrome (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.0 – Budd-Chiari syndrome
What it is
Budd-Chiari syndrome is obstruction of hepatic venous outflow, usually from thrombosis or blockage of the hepatic veins. It causes impaired drainage from the liver and may lead to congestion, hepatomegaly, and portal hypertension.
Clinical signs
Clinical features vary; refer to documentation. Common findings include abdominal pain, ascites, liver enlargement, and signs of portal hypertension. Imaging or other documented evidence of hepatic venous obstruction supports the diagnosis.
When to use this code
Use I82.0 when the record clearly documents Budd-Chiari syndrome or hepatic venous outflow obstruction affecting the hepatic veins. Code it when the provider identifies the condition as the active diagnosis, including chronic or acute presentations if documented that way.
Do not substitute this code for nonspecific liver disease, ascites alone, or general venous thrombosis without hepatic vein involvement. If the note is unclear about the site or cause, check documentation before assigning the code.
Do not use for
Do not use I82.0 for portal vein thrombosis, inferior vena cava thrombosis without hepatic vein obstruction, or liver congestion from nonvascular causes. Check documentation when the diagnosis is only suspected.
Coding tip
Confirm that the chart names Budd-Chiari syndrome or clearly describes hepatic venous outflow obstruction before coding I82.0.