ICD-10 Code I87.9 – Disorder of vein, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I87.9 – Disorder of vein, unspecified
What it is
I87.9 is used for a vein disorder when the provider documents a venous condition but does not name a more specific diagnosis. It signals a nonspecific problem involving the veins.
Clinical signs
Clinical features vary; refer to documentation. Vein disorders may involve swelling, pain, heaviness, visible vein changes, or other venous abnormalities, but the record must support the diagnosis.
When to use this code
Use I87.9 when the chart identifies a disorder of the veins and no more specific code is documented. It is appropriate for nonspecific venous disease, especially when laterality, type, or cause is not stated. Check documentation if the provider names a more precise venous condition.
Do not use for
Do not use this code when the record supports a specific venous diagnosis, such as varicose veins, venous insufficiency, or thrombosis. Also avoid it if the condition is not a vein disorder.
Coding tip
Query for specificity before assigning I87.9, because a more detailed venous diagnosis may be available in the documentation.