ICD-10 Code I82.522 – Chronic embolism and thrombosis of left iliac vein (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.522 – Chronic embolism and thrombosis of left iliac vein
What it is
I82.522 identifies a long-standing blockage in the left iliac vein caused by a clot or embolic material. Use it when documentation specifies chronic thrombosis or chronic embolism in that vein.
Clinical signs
Clinical features may include chronic unilateral leg swelling, pain, heaviness, or venous congestion on the left side. Imaging or vascular assessment may show persistent obstruction; clinical features vary, so refer to documentation.
When to use this code
Use this code when the provider documents chronic embolism or thrombosis specifically involving the left iliac vein. It may also apply when follow-up imaging or specialist notes confirm an ongoing chronic clot in that vessel. If laterality or chronicity is not clear, check documentation.
Do not use for
Do not use this code for acute iliac vein thrombosis, unspecified venous thrombosis, or thrombosis in a different vein. If the record only says “DVT” without left iliac vein and chronic status, check documentation.
Coding tip
Confirm both chronicity and left-sided iliac vein involvement before assigning I82.522.