ICD-10 Code I80.24 – Phlebitis and thrombophlebitis of peroneal vein (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I80.24 – Phlebitis and thrombophlebitis of peroneal vein
What it is
This code identifies inflammation of the peroneal vein with associated clot formation. Use it when the record specifically names the peroneal vein as the affected deep vein.
Clinical signs
Clinical features vary; refer to documentation. Commonly, deep vein thrombosis is described with leg pain, swelling, tenderness, or warmth, but the chart should support the peroneal vein location.
When to use this code
Use I80.24 when the provider documents phlebitis, thrombophlebitis, or venous thrombosis of the peroneal vein. It is appropriate when imaging, assessment, or discharge diagnosis identifies that vein specifically. If the note only says lower-extremity DVT, check documentation for the exact vein.
Do not use for
Do not use this code for superficial thrombophlebitis or for clots in other named veins. If the documentation does not specify the peroneal vein, check documentation before assigning I80.24.
Coding tip
Code the most specific vein named in the record and verify laterality or acuity only if documented.