ICD-10 Code I80.233 – Phlebitis and thrombophlebitis of tibial vein, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I80.233 – Phlebitis and thrombophlebitis of tibial vein, bilateral
What it is
I80.233 identifies inflammation and clot formation in both tibial veins, which are deep veins in the lower legs. Use it when the record clearly states bilateral tibial vein phlebitis or thrombophlebitis.
Clinical signs
Clinical features may include leg pain, tenderness, swelling, warmth, and possible redness along the affected calves. Diagnosis is usually documented by exam and imaging; if details are unclear, check documentation.
When to use this code
Use this code when the provider documents thrombophlebitis or phlebitis specifically in the tibial veins of both legs. It fits confirmed bilateral deep vein involvement, including cases described as acute or chronic if the tibial veins are named.
Do not assume laterality from general “lower-extremity DVT” wording. If the note names a different vein, a single leg, or does not specify tibial veins, code the documented site instead.
Do not use for
Do not use I80.233 for superficial phlebitis, unspecified leg vein thrombosis, or unilateral tibial vein disease. Check documentation when the vein location or laterality is not explicit.
Coding tip
Always verify both the vein type and bilateral laterality before assigning I80.233.