ICD-10 Code I87.03 – Postthrombotic syndrome with ulcer and inflammation (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I87.03 – Postthrombotic syndrome with ulcer and inflammation
What it is
I87.03 identifies postthrombotic syndrome after a prior venous thrombosis, with both ulceration and inflammation present. Use it for chronic venous damage that has progressed beyond simple swelling or skin change.
Clinical signs
Typical findings include chronic leg edema, skin discoloration, venous stasis changes, and an active ulcer with surrounding inflammatory changes. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record clearly links the ulcer and inflammation to postthrombotic syndrome, usually in the same affected limb. It fits chronic sequelae of prior deep vein thrombosis with documented venous ulceration. Check documentation if the cause of the ulcer is unclear.
Do not use for
Do not use this code for a venous ulcer without documented postthrombotic syndrome. It is also wrong when inflammation or ulceration is due to another condition, such as arterial disease or diabetes.
Coding tip
Verify that the provider documents both postthrombotic syndrome and the ulcer with inflammation before assigning I87.03.