ICD-10 Code I87.091 – Postthrombotic syndrome with other complications of right lower extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I87.091 – Postthrombotic syndrome with other complications of right lower extremity
What it is
This code identifies postthrombotic syndrome affecting the right lower extremity, with additional documented complications. It reflects chronic venous problems that develop after a prior deep vein thrombosis in that leg.
Clinical signs
Typical findings include chronic leg swelling, pain, heaviness, skin discoloration, and venous stasis changes in the right lower limb. Clinical features vary; refer to documentation.
When to use this code
Use I87.091 when the record clearly states postthrombotic syndrome in the right lower extremity and specifies other complications beyond the basic syndrome. Code it when the provider links the condition to prior thrombosis and documents the affected side.
It is appropriate for chronic sequelae seen in follow-up or vascular evaluations, not for an acute clot. If the complication is not described, check documentation before assigning this code.
Do not use for
Do not use this code for acute deep vein thrombosis, unspecific leg edema, or venous disease without a documented postthrombotic syndrome. Do not assume the complication type if the chart does not state it.
Coding tip
Confirm both laterality and the specific postthrombotic complication in the provider note before coding I87.091.