ICD-10 Code I82.5Y2 – Chronic embolism and thrombosis of unspecified deep veins of left proximal lower extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.5Y2 – Chronic embolism and thrombosis of unspecified deep veins of left proximal lower extremity
What it is
This code identifies a chronic, long-standing clot or embolic obstruction in deep veins of the left proximal lower extremity. Use it when the documentation specifies the left side and proximal deep veins, but does not name a more specific vein.
Clinical signs
Clinical features vary; refer to documentation. Common findings in chronic deep vein disease include persistent leg swelling, pain, heaviness, skin discoloration, or venous insufficiency changes, but the record must support chronic thrombosis or embolism.
When to use this code
Use this code when the provider documents chronic embolism or thrombosis involving unspecified deep veins in the left proximal lower extremity. It fits follow-up visits, ongoing management, or historical clot disease that remains clinically relevant. Check documentation if the anatomic site is unclear or if acuity is not stated.
Do not use for
Do not use it for acute DVT, superficial vein thrombosis, or embolism in a different limb or vein segment. If the chart only says “history of DVT” without current chronic disease, check documentation.
Coding tip
Confirm both chronicity and laterality; if the vein location is more specific, code that documented site instead.