ICD-10 Code I82.4Y2 – Acute embolism and thrombosis of unspecified deep veins of left proximal lower extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.4Y2 – Acute embolism and thrombosis of unspecified deep veins of left proximal lower extremity
What it is
This code identifies an acute blood clot or embolus in an unspecified deep vein of the left proximal lower extremity. Use it when the affected vein is deep, left-sided, and the proximal leg location is documented but the exact vein is not.
Clinical signs
Typical findings include unilateral leg swelling, pain, warmth, and tenderness, but clinical features vary; refer to documentation. Imaging or provider assessment usually confirms the deep vein thrombosis or embolism.
When to use this code
Use this code when the record states an acute DVT or embolism in a deep vein of the left proximal lower extremity and does not name a more specific vein. It is appropriate for encounters documenting the condition as current and acute. If the chart specifies a different site, laterality, or chronicity, choose the documented code instead.
Do not use for
Do not use it for chronic, recurrent, or resolved thrombosis, or when the clot is in a superficial vein. Check documentation if the provider names a more specific left-leg vein or a different lower-extremity location.
Coding tip
Code the most specific vein location available, and use this unspecified code only when the chart does not identify a more exact deep vein.