ICD-10 Code I82.4Z3 – Acute embolism and thrombosis of unspecified deep veins of distal lower extremity, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.4Z3 – Acute embolism and thrombosis of unspecified deep veins of distal lower extremity, bilateral
What it is
This code identifies an acute blood clot or embolus in deep veins of the lower legs on both sides. Use it when the record specifies bilateral distal lower-extremity deep vein involvement but does not name a more exact vein.
Clinical signs
Typical findings include leg pain, swelling, tenderness, warmth, or redness, though clinical features vary; refer to documentation. Diagnosis is usually supported by imaging or another documented clinical assessment of bilateral distal DVT.
When to use this code
Use I82.4Z3 when the provider documents an acute DVT or embolism in unspecified deep veins of the distal lower extremities on both sides. It fits cases where the clot is in the lower legs and laterality is clearly bilateral, but the exact vein is not stated. Check documentation if the site is more specific.
Do not use for
Do not use this code for chronic, recurrent, or history-only thrombosis. It is also wrong when the clot is in a named vein, a proximal leg vein, or when laterality is not bilateral.
Coding tip
Confirm both acuity and bilateral distal location before assigning this code; if the vein is specified elsewhere in the note, code the more precise option.