ICD-10 Code I82.459 – Acute embolism and thrombosis of unspecified peroneal vein (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.459 – Acute embolism and thrombosis of unspecified peroneal vein
What it is
I82.459 identifies an acute clot or embolus in a peroneal vein when the side is not documented. Use it for a newly diagnosed deep vein thrombosis in this calf vein.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include calf pain, swelling, tenderness, warmth, or unilateral leg discomfort, with imaging confirming venous thrombosis.
When to use this code
Use this code when the provider documents acute embolism or thrombosis involving a peroneal vein and does not specify right or left. It also fits cases confirmed by ultrasound or other imaging, as long as the event is acute. Code from the provider’s exact wording and laterality documentation.
Do not use for
Do not use it for chronic or old thrombosis, or when the clot is in a different vein segment. If the record specifies right or left peroneal vein, choose the laterality-specific code instead.
Coding tip
Check the note for acuity and laterality before assigning I82.459.