ICD-10 Code I87.003 – Postthrombotic syndrome without complications of bilateral lower extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I87.003 – Postthrombotic syndrome without complications of bilateral lower extremity
What it is
This code identifies postthrombotic syndrome affecting both lower extremities, without documented complications. It refers to chronic venous problems that follow prior deep vein thrombosis, causing ongoing leg symptoms or vein changes.
Clinical signs
Typical findings include leg swelling, heaviness, aching, skin discoloration, or venous stasis changes after a previous thrombosis. Clinical features vary; refer to documentation.
When to use this code
Use I87.003 when the record clearly documents postthrombotic syndrome in both legs and does not describe complications. You should also confirm that the condition is chronic and linked to prior thrombosis, not an acute clot. If the note only says venous insufficiency or leg edema, check documentation.
Do not use for
Do not use this code for acute deep vein thrombosis, isolated unilateral postthrombotic syndrome, or unspecified chronic venous disease. Check documentation if complications, such as ulcers or inflammation, are recorded.
Coding tip
Verify bilateral involvement and the absence of documented complications before assigning I87.003.