ICD-10 Code I82.A1 – Acute embolism and thrombosis of axillary vein (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.A1 – Acute embolism and thrombosis of axillary vein
What it is
I82.A1 identifies an acute blood clot or embolus in the axillary vein, a deep vein in the upper arm. Use it for a new, active venous thrombosis in this location.
Clinical signs
Clinical features may include arm swelling, pain, tenderness, and venous distention. Diagnosis is usually supported by imaging or other documented evidence of acute axillary vein thrombosis; clinical features vary, refer to documentation.
When to use this code
Use this code when the provider documents an acute embolism or thrombosis involving the axillary vein. It is appropriate for confirmed upper-extremity deep vein thrombosis in this vein, including cases described as acute clot, thrombus, or embolus. Check documentation for laterality and any associated conditions.
Do not use for
Do not use this code for chronic, old, or resolved thrombosis, or for superficial vein thrombosis. If the clot is in a different vein or the documentation is unclear, check documentation.
Coding tip
Code the acute axillary vein event only when the record clearly documents the site and acuity.