ICD-10 Code I82.B22 – Chronic embolism and thrombosis of left subclavian vein (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.B22 – Chronic embolism and thrombosis of left subclavian vein
What it is
This code identifies a long-standing blood clot or embolic obstruction in the left subclavian vein. Use it when documentation states the condition is chronic and specifically involves the left side.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include arm swelling, pain, venous distention, or prior imaging showing persistent venous obstruction in the left subclavian vein.
When to use this code
Use this code when the provider documents chronic embolism or chronic thrombosis of the left subclavian vein. It may also apply when a chronic clot is confirmed by imaging, operative note, or specialist assessment. Code the left-sided site exactly as documented.
Do not use for
Do not use this code for acute thrombosis, unspecified upper-extremity DVT, or thrombosis in another vein. Check documentation if the chronicity or laterality is unclear.
Coding tip
Confirm both chronic status and left subclavian location in the record before assigning I82.B22.