ICD-10 Code I82.603 – Acute embolism and thrombosis of unspecified veins of upper extremity, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.603 – Acute embolism and thrombosis of unspecified veins of upper extremity, bilateral
What it is
This code identifies a sudden blood clot or embolus in unspecified veins of both upper extremities. Use it when the record confirms bilateral arm vein involvement but does not name the exact veins.
Clinical signs
Typical findings include arm swelling, pain, tenderness, warmth, or visible venous distention. Clinical features vary; refer to documentation, and confirm bilateral involvement and the acute nature of the event.
When to use this code
Use I82.603 when the provider documents acute thrombosis or embolism affecting veins in both arms and does not specify superficial or deep veins. It is also appropriate when the note clearly states bilateral upper-extremity venous thrombosis without further detail. Check documentation if the laterality or vein type is unclear.
Do not use for
Do not use this code for chronic or old thrombosis, or when the clot is limited to one arm. If the record specifies a different vein location, code that more specific diagnosis instead.
Coding tip
Verify both laterality and acuity in the provider note before assigning I82.603.