ICD-10 Code I82.5Z – Chronic embolism and thrombosis of unspecified deep veins of distal lower extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.5Z – Chronic embolism and thrombosis of unspecified deep veins of distal lower extremity
What it is
This code identifies a chronic blood clot or embolic blockage in a deep vein of the lower leg or foot, when the exact distal vein is not specified. It reflects an ongoing, not acute, venous obstruction.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include persistent leg swelling, discomfort, skin discoloration, or signs of chronic venous insufficiency after prior deep vein thrombosis.
When to use this code
Use this code when the record clearly documents chronic embolism or chronic thrombosis in an unspecified deep vein of the distal lower extremity. It fits follow-up encounters, residual clot, or longstanding venous obstruction. Check documentation if the site is more specific or if the event is acute.
Do not use for
Do not use it for acute deep vein thrombosis, superficial vein thrombosis, or embolism in a different vascular territory. If the provider names a more specific vein or laterality, code that instead.
Coding tip
Code the chronicity and anatomic location exactly as documented; if the note says only “DVT,” verify whether it is chronic and distal.