ICD-10 Code I87.321 – Chronic venous hypertension (idiopathic) with inflammation of right lower extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I87.321 – Chronic venous hypertension (idiopathic) with inflammation of right lower extremity
What it is
I87.321 identifies chronic venous hypertension of the right lower extremity when the cause is idiopathic and there is associated inflammation. Use it for long-standing venous pressure problems limited to the right leg.
Clinical signs
Typical findings include chronic leg swelling, skin discoloration, heaviness, and inflammatory changes such as redness or tenderness. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents chronic venous hypertension in the right lower extremity, specifies idiopathic origin, and notes inflammation. It fits outpatient, inpatient, or problem-list documentation when the diagnosis is established. Check documentation if laterality or etiology is unclear.
Do not use for
Do not use it for venous disease in the left leg, bilateral disease, or cases without documented inflammation. Avoid this code if the record does not support idiopathic chronic venous hypertension.
Coding tip
Verify laterality, idiopathic etiology, and inflammatory involvement before assigning I87.321.