ICD-10 Code H40.81 – Glaucoma with increased episcleral venous pressure (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H40.81 – Glaucoma with increased episcleral venous pressure
What it is
This code identifies glaucoma caused by elevated episcleral venous pressure, which can impair aqueous outflow and raise intraocular pressure. Use it when the diagnosis specifically links glaucoma to this venous pressure problem.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include elevated intraocular pressure, optic nerve damage, and visual field loss, with evidence of increased episcleral venous pressure on examination.
When to use this code
Use H40.81 when the provider documents glaucoma due to increased episcleral venous pressure, including secondary glaucoma attributed to that mechanism. It may also apply when the record clearly states this specific etiology even if the glaucoma subtype is not further detailed.
Do not use for
Do not use this code for glaucoma without documented increased episcleral venous pressure. Check documentation if the record only describes ocular hypertension, open-angle glaucoma, or another secondary cause.
Coding tip
Code the cause only when the provider explicitly connects glaucoma to increased episcleral venous pressure.