ICD-10 Code I82.221 – Chronic embolism and thrombosis of inferior vena cava (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.221 – Chronic embolism and thrombosis of inferior vena cava
What it is
I82.221 identifies a chronic clot or embolic blockage in the inferior vena cava, the large vein that returns blood from the lower body to the heart. Use it when the condition is documented as chronic, not acute.
Clinical signs
Clinical features vary; refer to documentation. Patients may have swelling, venous congestion, or collateral vein formation, and imaging may show persistent obstruction of the inferior vena cava.
When to use this code
Use this code when the provider documents chronic embolism or thrombosis involving the inferior vena cava. It may also apply when imaging or specialist notes confirm an old, persistent caval clot. Do not assume chronicity from a current venous thromboembolism diagnosis alone.
Do not use for
Do not use this code for acute inferior vena cava thrombosis or for thrombosis in another vein segment. Check documentation if the record only states DVT, venous obstruction, or history of clot without confirming the inferior vena cava.
Coding tip
Code I82.221 only when the provider clearly documents chronic inferior vena cava thrombosis or embolism.