ICD-10 Code I87.031 – Postthrombotic syndrome with ulcer and inflammation of right lower extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I87.031 – Postthrombotic syndrome with ulcer and inflammation of right lower extremity
What it is
This code identifies chronic venous damage after a prior blood clot in the right leg, with both an ulcer and inflammation present. Use it when documentation shows postthrombotic syndrome affecting the right lower extremity.
Clinical signs
Typical findings include chronic leg swelling, skin discoloration, pain, and a venous ulcer on the right lower leg. Clinical features vary; refer to documentation for evidence of inflammation and postthrombotic changes.
When to use this code
Use I87.031 when the provider documents postthrombotic syndrome in the right leg and specifies an ulcer with inflammation. It is appropriate for chronic sequelae of prior deep vein thrombosis, not for an acute clot.
Confirm laterality and the presence of both ulceration and inflammation in the record. If the documentation is incomplete, check documentation before assigning the code.
Do not use for
Do not use this code for acute deep vein thrombosis, isolated venous insufficiency, or a leg ulcer without postthrombotic syndrome. Do not assume laterality if the right side is not documented.
Coding tip
Match the code to the documented side and complication details; if ulcer or inflammation is missing, verify the exact diagnosis first.