ICD-10 Code I82.4Y – Acute embolism and thrombosis of unspecified deep veins of proximal lower extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.4Y – Acute embolism and thrombosis of unspecified deep veins of proximal lower extremity
What it is
This code identifies an acute blood clot, with or without embolism, in a deep vein of the proximal lower extremity when the exact vein is not specified. Use it for recent lower-leg clotting in the thigh or other proximal deep veins.
Clinical signs
Typical findings include unilateral leg swelling, pain, warmth, tenderness, or redness. Clinical features vary; refer to documentation, and confirm the clot is in a proximal deep vein and described as acute.
When to use this code
Use this code when the record documents an acute deep vein thrombosis or embolism in a proximal lower-extremity vein, but does not name the exact vessel. It fits cases involving the femoral, popliteal, or other proximal deep veins when specificity is lacking. Check documentation if laterality or vessel detail is unclear.
Do not use for
Do not use it for chronic, old, or resolved thrombosis, or for superficial venous thrombosis. If the clot is in a different location or the chart specifies another vein, choose the more specific code.
Coding tip
Code to the most specific vein and laterality available; if the documentation only says “proximal DVT,” this code may be appropriate.