ICD-10 Code I82.401 – Acute embolism and thrombosis of unspecified deep veins of right lower extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.401 – Acute embolism and thrombosis of unspecified deep veins of right lower extremity
What it is
This code identifies an acute blood clot or embolus in a deep vein of the right lower leg or thigh, when the specific vein is not documented. Use it for a current, new event on the right side.
Clinical signs
Typical findings include unilateral right leg swelling, pain, tenderness, warmth, or redness. Clinical features vary; refer to documentation, and confirm the acute nature and deep venous location when available.
When to use this code
Use this code when the record clearly states acute embolism or thrombosis of an unspecified deep vein in the right lower extremity. It is appropriate when imaging or provider documentation confirms DVT but does not name the exact vein. You should verify that the event is acute, not chronic or historical.
Do not use for
Do not use this code for chronic or old deep vein thrombosis, superficial thrombophlebitis, or left-sided disease. Check documentation if the note only says “DVT” without laterality or acuity.
Coding tip
Capture laterality and acuity from the provider note, because missing either detail can lead to a different or unspecified code.