ICD-10 Code I82.4Z – Acute embolism and thrombosis of unspecified deep veins of distal lower extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.4Z – Acute embolism and thrombosis of unspecified deep veins of distal lower extremity
What it is
This code identifies an acute clot or embolus in a deep vein of the lower leg, but the exact vein is not specified. Use it when documentation confirms distal lower-extremity DVT without naming a particular vessel.
Clinical signs
Typical findings include unilateral leg pain, swelling, tenderness, warmth, or erythema. Clinical features vary; refer to documentation, and confirm that the provider documented an acute deep venous clot in the distal lower extremity.
When to use this code
Use this code when the record states acute embolism or thrombosis in a deep vein of the calf or other distal lower-extremity vein, but does not identify the exact vein. It is appropriate when imaging or provider assessment supports DVT and the site remains unspecified. If the documentation names a more specific vein, code that instead.
Do not use for
Do not use this code for chronic, old, or resolved thrombosis, or for superficial vein thrombosis. Check documentation if the clot is in a proximal leg vein, another limb, or a specified deep vein.
Coding tip
Verify that “acute” and “distal lower extremity” are both documented before assigning I82.4Z.