ICD-10 Code I82.491 – Acute embolism and thrombosis of other specified deep vein of right lower extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.491 – Acute embolism and thrombosis of other specified deep vein of right lower extremity
What it is
This code identifies an acute blood clot or embolus in a specified deep vein of the right lower leg that is not named elsewhere in ICD-10-CM. Use it when the documentation clearly states the right side and an acute deep venous event.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include unilateral leg pain, swelling, tenderness, warmth, or erythema, but imaging or provider diagnosis is usually needed to confirm the deep vein involvement.
When to use this code
Use I82.491 when the provider documents an acute embolism or thrombosis in a specified deep vein of the right lower extremity and does not name a more specific vein code. It may also apply when the record identifies a right-sided deep vein clot but the exact vein is not otherwise classifiable. Check documentation for acuity and laterality before assigning the code.
Do not use for
Do not use this code for chronic or old thrombosis, superficial vein thrombosis, or left-sided lower-extremity events. If the documentation names a different vein or body site, select the more specific code.
Coding tip
Verify both acuity and right-sided laterality in the provider note before coding, and choose a more specific deep vein code if the exact vein is documented.