ICD-10 Code I82.B19 – Acute embolism and thrombosis of unspecified subclavian vein (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.B19 – Acute embolism and thrombosis of unspecified subclavian vein
What it is
This code identifies an acute blood clot or embolus in the subclavian vein when the affected side is not documented. Use it for a recent venous obstruction in the vein beneath the collarbone.
Clinical signs
Typical findings include arm or shoulder swelling, pain, heaviness, and possible venous distention. Clinical features vary; refer to documentation, imaging, and the provider’s diagnosis for confirmation.
When to use this code
Use I82.B19 when the record states acute embolism or thrombosis of the subclavian vein and does not specify right or left. It fits confirmed cases documented by the provider, often after imaging or specialist evaluation. If the side is documented, code the specified laterality instead.
Do not use for
Do not use this code for chronic or old thrombotic disease, or for thrombosis in a different vein location. Check documentation if the record only mentions suspected clot or superficial thrombophlebitis.
Coding tip
Look for “acute” and “unspecified side” in the diagnosis wording before assigning I82.B19.