ICD-10 Code I82.45 – Acute embolism and thrombosis of peroneal vein (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.45 – Acute embolism and thrombosis of peroneal vein
What it is
I82.45 identifies an acute blood clot or embolus in the peroneal vein of the lower leg. Use it when documentation specifies the peroneal vein as the site and the event is acute.
Clinical signs
Typical findings include unilateral leg pain, swelling, tenderness, or warmth, but clinical features vary; refer to documentation. Imaging, usually venous ultrasound, may confirm thrombosis in the peroneal vein.
When to use this code
Use this code when the provider documents acute embolism or thrombosis limited to the peroneal vein. It fits confirmed distal deep vein thrombosis in that vein, whether found during evaluation of leg swelling or incidentally on imaging.
If the record states a different lower-extremity vein, or does not specify the peroneal vein, choose the documented site instead. Check documentation when laterality, acuity, or vessel location is unclear.
Do not use for
Do not use I82.45 for chronic, recurrent, or unspecified venous thrombosis. It is also wrong for superficial vein thrombosis or clots documented in other named veins.
Coding tip
Code the exact vein named in the note; if the peroneal vein is not clearly documented, do not assume I82.45.