ICD-10 Code I82.5Y3 – Chronic embolism and thrombosis of unspecified deep veins of proximal lower extremity, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.5Y3 – Chronic embolism and thrombosis of unspecified deep veins of proximal lower extremity, bilateral
What it is
This code identifies a chronic, ongoing clot or embolic blockage in the deep veins of both proximal lower extremities, with the exact vein not specified. Use it when the record documents a persistent deep vein thrombosis affecting both legs.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include leg swelling, pain, heaviness, skin discoloration, or signs of prior venous obstruction, but the diagnosis should be supported by documented chronic thrombosis.
When to use this code
Use this code when the provider documents chronic embolism or thrombosis in unspecified deep veins of the proximal lower extremities on both sides. It fits follow-up visits, history of persistent DVT, or imaging-confirmed chronic clot when no more specific vein is named.
If the note only says “DVT” without chronicity, laterality, or proximal location, check documentation before coding. Code the documented condition as written and avoid assuming acute disease or a more specific vessel.
Do not use for
Do not use this code for acute DVT, superficial vein thrombosis, or embolism without thrombosis. Also avoid it when the record identifies a different vein location or only one leg is involved.
Coding tip
Confirm chronicity, bilateral involvement, and proximal deep-vein location before assigning I82.5Y3.