ICD-10 Code I82.C12 – Acute embolism and thrombosis of left internal jugular vein (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.C12 – Acute embolism and thrombosis of left internal jugular vein
What it is
This code identifies a recent clot or embolus in the left internal jugular vein, a major neck vein that drains blood from the brain and face. Use it when the documentation specifically states the left internal jugular vein and an acute event.
Clinical signs
Clinical features vary; refer to documentation. Typical notes may describe neck pain or swelling, tenderness along the vein, or imaging-confirmed venous thrombosis. You should rely on provider documentation and diagnostic imaging when available.
When to use this code
Use I82.C12 when the provider documents an acute embolism or thrombosis involving the left internal jugular vein. It may appear in settings with neck venous clot confirmed by ultrasound, CT, or other imaging. Verify laterality and acuity before coding.
Do not use for
Do not use this code for chronic or old thrombosis, or for clots in a different vein or side. If the record does not clearly identify the left internal jugular vein, check documentation.
Coding tip
Always confirm “acute,” “embolism,” or “thrombosis,” plus left-sided internal jugular vein involvement, before assigning I82.C12.