ICD-10 Code I82.A19 – Acute embolism and thrombosis of unspecified axillary vein (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.A19 – Acute embolism and thrombosis of unspecified axillary vein
What it is
This code identifies an acute blood clot blocking an axillary vein, with the side not specified. Use it when documentation states embolism or thrombosis in the axillary vein and does not name right or left.
Clinical signs
Typical findings include arm swelling, pain, heaviness, and sometimes visible superficial veins. Clinical features vary; refer to documentation, and confirm the diagnosis with the provider’s recorded assessment or imaging report.
When to use this code
Use I82.A19 when the record documents an acute axillary vein thrombosis or embolism and laterality is not stated. It also fits when the provider clearly names the axillary vein but does not specify which side. If the note identifies a different upper-extremity vein, choose the more specific code.
Do not use for
Do not use this code for chronic or old thrombosis, or when the clot is in a different vein, such as subclavian or brachial. Check documentation if laterality is known or if the diagnosis is uncertain.
Coding tip
Verify acuity and laterality in the final provider note before assigning I82.A19.