ICD-10 Code I82.5Z3 – Chronic embolism and thrombosis of unspecified deep veins of distal lower extremity, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.5Z3 – Chronic embolism and thrombosis of unspecified deep veins of distal lower extremity, bilateral
What it is
This code identifies a chronic clot or old embolic blockage in the deep veins of both distal lower extremities, without naming a specific vein. Use it when the record documents a persistent, bilateral deep venous process.
Clinical signs
Clinical features may include leg swelling, pain, heaviness, skin discoloration, or venous stasis changes. Imaging or provider documentation should support chronic deep vein involvement; clinical features vary, so refer to documentation.
When to use this code
Use this code when the provider documents chronic embolism or thrombosis affecting unspecified deep veins in the distal lower legs on both sides. It also fits follow-up encounters for an established bilateral chronic DVT-type condition when no more specific vein is named.
Do not use for
Do not use this code for acute DVT, superficial vein thrombosis, or unilateral disease. If the record identifies a more specific vein, laterality, or acute/chronic status, code that information instead.
Coding tip
Verify that “chronic,” “bilateral,” and “distal lower extremity” are documented before assigning I82.5Z3.