ICD-10 Code I82.52 – Chronic embolism and thrombosis of iliac vein (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.52 – Chronic embolism and thrombosis of iliac vein
What it is
This code identifies a long-standing blockage in an iliac vein caused by a clot or embolic material. It refers to chronic venous obstruction in the pelvic venous system, not an acute new clot.
Clinical signs
Common findings include leg swelling, pain, heaviness, or visible collateral veins. Clinical features vary; refer to documentation, especially when imaging confirms chronic iliac venous thrombosis or embolism.
When to use this code
Use I82.52 when the provider documents chronic thrombosis or chronic embolism involving an iliac vein. It fits follow-up care, persistent venous obstruction, or a prior clot described as chronic on imaging or in the assessment.
Apply it when the record clearly distinguishes chronic disease from acute DVT. If the note only says “venous thrombosis” or the vein location is unclear, check documentation before coding.
Do not use for
Do not use this code for acute iliac vein thrombosis or for thrombosis in another venous site. Also avoid it when the chart does not specify chronicity or iliac vein involvement.
Coding tip
Confirm both the vein location and the chronic nature of the clot in the provider’s documentation before assigning I82.52.