ICD-10 Code H40.819 – Glaucoma with increased episcleral venous pressure, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H40.819 – Glaucoma with increased episcleral venous pressure, unspecified eye
What it is
This code identifies glaucoma caused by elevated episcleral venous pressure in an eye that is not specified as right or left. It describes a secondary glaucoma mechanism rather than primary open-angle disease.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include glaucomatous optic nerve damage, elevated intraocular pressure, and signs consistent with impaired venous drainage.
When to use this code
Use H40.819 when the provider documents glaucoma due to increased episcleral venous pressure and does not specify the affected eye. This is appropriate when the diagnosis is clearly stated in the record and laterality is unavailable. If the note identifies a right or left eye, use the more specific code instead.
Do not use for
Do not use this code for primary glaucoma, ocular hypertension without glaucoma, or other secondary glaucomas with different causes. Check documentation if the eye laterality or underlying cause is not clearly stated.
Coding tip
Verify both the glaucoma type and laterality in the ophthalmology note before assigning H40.819.