ICD-10 Code I82.529 – Chronic embolism and thrombosis of unspecified iliac vein (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.529 – Chronic embolism and thrombosis of unspecified iliac vein
What it is
This code identifies a chronic blood clot or embolic obstruction in an iliac vein when the affected side is not specified. It refers to a long-standing venous blockage in the pelvis.
Clinical signs
Clinical features vary; refer to documentation. Commonly documented findings include leg swelling, pain, heaviness, or signs of chronic venous insufficiency affecting the lower extremity.
When to use this code
Use this code when the provider documents chronic embolism or thrombosis in an iliac vein without stating right or left. It is appropriate for established, ongoing venous disease, not an acute event. If the record identifies a specific side, code the laterality instead.
Do not use for
Do not use this code for acute iliac vein thrombosis or for thrombosis in a different venous site. Check documentation if the note describes superficial venous disease or a history of clot without current chronic thrombosis.
Coding tip
Confirm both chronicity and unspecified laterality in the provider note before assigning I82.529.