ICD-10 Code I82.402 – Acute embolism and thrombosis of unspecified deep veins of left lower extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.402 – Acute embolism and thrombosis of unspecified deep veins of left lower extremity
What it is
This code identifies an acute blood clot or embolus in a deep vein of the left lower extremity when the specific vein is not documented. Use it for a new, active deep vein thrombosis affecting the left leg.
Clinical signs
Typical findings include unilateral left leg swelling, pain, warmth, tenderness, or redness. Clinical features vary; refer to documentation, and confirm that the clot is in a deep vein rather than a superficial vein.
When to use this code
Use I82.402 when the record states acute DVT or acute embolism/thrombosis of a left leg deep vein, but does not name a more specific vein. It also fits when imaging or the provider documents left lower-extremity deep venous thrombosis without further detail. If the vein site is specified, code that more precise option instead.
Do not use for
Do not use this code for chronic, recurrent, or resolved thrombosis, or for superficial thrombophlebitis. Check documentation if the side, acuity, or deep-vein location is unclear.
Coding tip
Code the highest level of specificity available, and verify laterality and acuity before assigning I82.402.