ICD-10 Code I82.5Y – Chronic embolism and thrombosis of unspecified deep veins of proximal lower extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.5Y – Chronic embolism and thrombosis of unspecified deep veins of proximal lower extremity
What it is
This code identifies a chronic clot or embolic blockage in a deep vein of the proximal lower extremity, such as the thigh or pelvis, when the exact vein is not specified. It reflects an ongoing, not acute, venous obstruction.
Clinical signs
Findings may include persistent leg swelling, pain, heaviness, skin discoloration, or venous changes from prior deep vein thrombosis. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record documents a chronic embolism or thrombosis in a deep vein of the proximal lower extremity and does not name a more specific vein. It is appropriate for follow-up visits, history with persistent clot, or chronic venous obstruction. Check documentation if acuity or location is unclear.
Do not use for
Do not use it for acute DVT, superficial vein thrombosis, or embolism in a different vascular site. If the provider specifies a more precise vein or laterality, code that detail instead.
Coding tip
Confirm both chronicity and an unspecified proximal deep vein location in the note before assigning I82.5Y.