ICD-10 Code I82.5Z1 – Chronic embolism and thrombosis of unspecified deep veins of right distal lower extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.5Z1 – Chronic embolism and thrombosis of unspecified deep veins of right distal lower extremity
What it is
This code describes a long-standing blood clot or embolus in the deep veins of the right lower leg, with the exact vein not specified. Use it when documentation confirms a chronic deep vein process on the right distal lower extremity.
Clinical signs
Findings may include persistent leg swelling, pain, heaviness, skin discoloration, or signs of venous insufficiency. Clinical features vary; refer to documentation, imaging, and the provider’s assessment of chronicity and laterality.
When to use this code
Use this code when the record clearly states chronic embolism and thrombosis involving deep veins of the right distal lower extremity, but does not identify a more specific vein. It is appropriate for follow-up visits, ongoing management, or documented residual clot disease. If the note only says “DVT” without chronicity or laterality, check documentation.
Do not use for
Do not use it for acute deep vein thrombosis, unspecified leg laterality, or superficial vein thrombosis. Also avoid it when the documentation identifies a different extremity or a more specific deep vein code is available.
Coding tip
Verify chronicity, right-sided location, and distal lower-extremity involvement before assigning I82.5Z1.