ICD-10 Code I82.A – Embolism and thrombosis of axillary vein (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.A – Embolism and thrombosis of axillary vein
What it is
This code identifies a blood clot in the axillary vein, the large vein in the armpit region. It covers embolism or thrombosis affecting that vein and is used when documentation names the axillary vein specifically.
Clinical signs
Clinical features vary; refer to documentation. Commonly documented findings include upper-extremity swelling, pain, tenderness, or venous congestion, with imaging confirming clot in the axillary vein.
When to use this code
Use I82.A when the provider documents embolism or thrombosis of the axillary vein as the diagnosis. Apply it for confirmed upper-extremity venous thrombosis involving that vessel, including cases found on ultrasound or other imaging.
If the record only says “upper-extremity DVT” without naming the axillary vein, check documentation before assigning this code. Make sure the clot is venous and specifically tied to the axillary vein.
Do not use for
Do not use this code for thrombosis in a different vein, arterial occlusion, or nonspecific limb swelling. Check documentation if the record does not clearly identify the axillary vein.
Coding tip
Code from the provider’s exact vein location; “upper-extremity DVT” alone is not enough if the axillary vein is not documented.