ICD-10 Code I82.A13 – Acute embolism and thrombosis of axillary vein, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.A13 – Acute embolism and thrombosis of axillary vein, bilateral
What it is
This code identifies an acute blood clot or embolus in both axillary veins, the large veins in the armpit area that drain the upper arms. Use it when documentation clearly states bilateral axillary vein involvement.
Clinical signs
Clinical features may include arm swelling, pain, tenderness, or a feeling of heaviness, sometimes with visible venous distention. Diagnosis is usually confirmed by imaging; clinical features vary, refer to documentation.
When to use this code
Use I82.A13 when the provider documents acute thrombosis or embolism affecting both axillary veins. It is appropriate for confirmed bilateral upper-extremity venous thrombosis, including cases described as acute clot, thrombus, or embolus in the axillary veins.
If the record only mentions upper-extremity DVT without specifying the axillary veins or bilaterality, check documentation before coding. Make sure the acute nature is documented, since chronic or historical thrombosis may require a different code.
Do not use for
Do not use this code for thrombosis in a different vein location, such as subclavian, brachial, or lower-extremity veins. Also avoid it when the chart does not support an acute bilateral axillary event.
Coding tip
Always verify both the vein site and laterality in the provider note; if either is missing, check documentation.