ICD-10 Code I87.013 – Postthrombotic syndrome with ulcer of bilateral lower extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I87.013 – Postthrombotic syndrome with ulcer of bilateral lower extremity
What it is
This code describes chronic venous damage after prior thrombosis, with an ulcer on both lower extremities. It indicates postthrombotic syndrome complicated by bilateral leg ulceration.
Clinical signs
Typical findings include chronic leg swelling, skin discoloration, heaviness, and a venous ulcer that is slow to heal. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record clearly documents postthrombotic syndrome and ulcers affecting both lower legs. You should also use it when the provider links the ulceration to the postthrombotic condition. If laterality or the venous cause is unclear, check documentation before assigning the code.
Do not use for
Do not use this code for venous ulcers without documented postthrombotic syndrome, or for ulcers on only one leg. Check documentation if the condition is described as chronic venous insufficiency without a thrombotic history.
Coding tip
Confirm both the postthrombotic syndrome and bilateral ulcer location in the provider note before coding.