ICD-10 Code I82.4Z1 – Acute embolism and thrombosis of unspecified deep veins of right distal lower extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.4Z1 – Acute embolism and thrombosis of unspecified deep veins of right distal lower extremity
What it is
This code identifies an acute blood clot or embolus in a deep vein of the right lower leg, but the exact vein is not specified. Use it when documentation confirms a new deep vein thrombosis in the distal right lower extremity.
Clinical signs
Typical findings include unilateral leg swelling, pain, tenderness, warmth, or redness. Clinical features vary; refer to documentation, and confirm that the clot is acute and located in a deep vein of the right distal leg.
When to use this code
Use this code when the provider documents acute deep vein thrombosis or embolism in an unspecified deep vein of the right distal lower extremity. It fits cases where the site is clearly right-sided and distal, but the exact vein is not named.
Check documentation if the record only says “DVT” without laterality, acuity, or location. You should also verify that the episode is acute rather than chronic, recurrent, or historical.
Do not use for
Do not use this code for chronic or recurrent venous thrombosis, left-sided disease, or superficial vein thrombosis. If the documentation is incomplete, check documentation before assigning I82.4Z1.
Coding tip
Confirm three elements in the note: acute, right side, and distal deep vein involvement.