ICD-10 Code I82.422 – Acute embolism and thrombosis of left iliac vein (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.422 – Acute embolism and thrombosis of left iliac vein
What it is
This code identifies an acute blood clot or embolus in the left iliac vein, a major pelvic vein that drains blood from the left leg. Use it when documentation specifies the left side and an acute event.
Clinical signs
Clinical features may include unilateral left leg swelling, pain, warmth, or tenderness, and sometimes venous congestion. Imaging or other documentation should confirm left iliac vein involvement; clinical features vary; refer to documentation.
When to use this code
Use I82.422 when the provider documents acute thrombosis or embolism in the left iliac vein, including a newly diagnosed deep venous clot in that location. Code it when the record clearly states the left side and acute nature. If the site or acuity is unclear, check documentation.
Do not use for
Do not use this code for chronic, recurrent, or unspecified venous thrombosis, or for clots in other veins such as femoral or popliteal vessels. If the documentation does not confirm the left iliac vein, check documentation.
Coding tip
Verify both laterality and acuity in the provider note before assigning I82.422.