ICD-10 Code I82.423 – Acute embolism and thrombosis of iliac vein, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.423 – Acute embolism and thrombosis of iliac vein, bilateral
What it is
This code identifies an acute blood clot or embolus in both iliac veins, the large pelvic veins that drain blood from the legs. Use it when documentation clearly states bilateral iliac vein involvement.
Clinical signs
Typical findings include new leg swelling, pain, heaviness, or tenderness, sometimes with pelvic discomfort. Clinical features vary; refer to documentation and imaging confirmation when available.
When to use this code
Use I82.423 when the record specifies an acute embolism or thrombosis affecting both iliac veins. It is appropriate for confirmed bilateral proximal venous clotting, whether found on imaging or documented by the provider. If laterality is not bilateral, check documentation.
Do not use for
Do not use this code for chronic thrombosis, superficial vein thrombosis, or clotting limited to a different venous site. If the note does not identify both iliac veins, do not assume bilateral involvement.
Coding tip
Verify the site, acuity, and laterality in the provider note before assigning I82.423.