ICD-10 Code I87.399 – Chronic venous hypertension (idiopathic) with other complications of unspecified lower extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I87.399 – Chronic venous hypertension (idiopathic) with other complications of unspecified lower extremity
What it is
I87.399 identifies chronic venous hypertension in the lower leg veins when the cause is idiopathic and the record notes other complications, but does not specify the exact complication or side. Use it when the documentation supports venous pressure elevation with an unspecified lower extremity.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings may include leg swelling, skin discoloration, venous stasis changes, or discomfort related to chronic venous disease.
When to use this code
Use this code when the provider documents chronic venous hypertension, describes it as idiopathic, and notes another complication without naming a more specific one. It also fits when the affected lower extremity is not identified in the chart. If laterality or complication is documented, code more specifically.
Do not use for
Do not use this code for acute venous problems, simple varicose veins, or venous insufficiency without chronic hypertension. Check documentation if the condition is secondary, postthrombotic, or linked to a more specific complication.
Coding tip
Verify both “idiopathic” and “other complications” in the note before assigning I87.399, and query for laterality if the chart is unclear.