ICD-10 Code I80.212 – Phlebitis and thrombophlebitis of left iliac vein (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I80.212 – Phlebitis and thrombophlebitis of left iliac vein
What it is
This code identifies inflammation of the left iliac vein with associated thrombosis. Use it when documentation specifically states phlebitis or thrombophlebitis in that vein.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include unilateral pelvic or lower abdominal venous thrombosis, pain, swelling, or imaging evidence of clot in the left iliac vein.
When to use this code
Use I80.212 when the provider documents left iliac vein phlebitis or thrombophlebitis, including confirmed venous inflammation with clot. It may also fit when imaging or specialist notes clearly localize the thrombus to the left iliac vein.
Do not use for
Do not assign this code for thrombosis in a different vein or for superficial phlebitis elsewhere. If the chart only says “deep vein thrombosis” without site detail, check documentation.
Coding tip
Always verify laterality and exact venous site in the record before coding.