ICD-10 Code H40.813 – Glaucoma with increased episcleral venous pressure, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H40.813 – Glaucoma with increased episcleral venous pressure, bilateral
What it is
This code identifies bilateral glaucoma associated with increased episcleral venous pressure. Use it when documentation states this specific mechanism affecting both eyes.
Clinical signs
Clinical features may include elevated intraocular pressure and optic nerve changes consistent with glaucoma. Findings depend on the underlying cause; refer to documentation.
When to use this code
Use H40.813 when the record clearly documents glaucoma due to increased episcleral venous pressure in both eyes. It also fits when the provider names this diagnosis, even if the exact cause is still being evaluated. If laterality is not bilateral, check documentation for a more specific code.
Do not use for
Do not use this code for glaucoma without documented increased episcleral venous pressure. It is also incorrect for unilateral disease or for nonspecific glaucoma diagnoses.
Coding tip
Verify both laterality and the stated mechanism before assigning H40.813.