ICD-10 Code I82.A23 – Chronic embolism and thrombosis of axillary vein, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.A23 – Chronic embolism and thrombosis of axillary vein, bilateral
What it is
This code identifies a long-standing blood clot or embolic blockage in both axillary veins, the deep veins in the armpit area. Use it when the condition is documented as chronic and bilateral.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include arm swelling, pain, heaviness, or venous distention, but the record should confirm bilateral axillary vein involvement and chronicity.
When to use this code
Use I82.A23 when the provider documents chronic thrombosis or embolism affecting both axillary veins. It may appear in notes describing persistent upper-extremity deep vein thrombosis, prior clot with ongoing residual obstruction, or chronic venous occlusion.
Code it only when the bilateral axillary location is explicit. If the chart says upper-extremity DVT without side, chronicity, or vein specificity, check documentation before assigning this code.
Do not use for
Do not use this code for acute axillary vein thrombosis, unilateral disease, or superficial vein thrombosis. Check documentation if the record describes another upper-extremity vein or an unspecified clot.
Coding tip
Confirm both chronic status and bilateral axillary vein involvement in the provider note before coding.