ICD-10 Code I82.A22 – Chronic embolism and thrombosis of left axillary vein (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.A22 – Chronic embolism and thrombosis of left axillary vein
What it is
This code identifies a long-standing blood clot or embolus in the left axillary vein, a deep vein in the upper arm. Use it when documentation specifies chronic involvement on the left side.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include arm swelling, pain, heaviness, or venous congestion, but chronic cases can be subtle or partly resolved.
When to use this code
Use I82.A22 when the provider documents chronic embolism or thrombosis in the left axillary vein. It may appear in follow-up notes, imaging reports, or problem lists for an established upper-extremity venous clot.
Code it only when chronicity and left axillary vein location are clear. If the record says acute, unspecified, or another vein, choose the documented diagnosis instead.
Do not use for
Do not use this code for acute axillary vein thrombosis or for thrombosis in a different vein. Check documentation if the laterality or chronic status is not stated.
Coding tip
Verify both chronicity and left-sided axillary vein involvement before assigning I82.A22.