Glaucoma w increased episcleral venous pressure, bilateral

This code signifies a specific type of secondary glaucoma affecting both eyes, characterized by elevated pressure within the episcleral veins. This increased venous pressure subsequently leads to elevated intraocular pressure (IOP) and optic nerve damage. It is distinct from primary open-angle glaucoma and other secondary glaucomas where the underlying cause of IOP elevation differs.

Use this code when documentation clearly indicates bilateral glaucoma caused by or associated with increased episcleral venous pressure. This condition is often linked to underlying systemic conditions like thyroid eye disease, carotid-cavernous fistula, or superior vena cava syndrome. Documentation should specify the bilateral involvement and the etiology of increased episcleral venous pressure.

• Ensure documentation explicitly states "bilateral" involvement; otherwise, use a unilateral code.
• Always code the underlying systemic condition causing the increased episcleral venous pressure first, if known and documented.
• Differentiate from other secondary glaucomas (e.g., H40.4- for glaucoma secondary to ocular trauma) where the mechanism of IOP elevation is different.