Chronic angle-closure glaucoma, bilateral, mild stage

This code signifies a chronic form of angle-closure glaucoma affecting both eyes, where the iris blocks the drainage angle, leading to increased intraocular pressure. The condition is in its mild stage, indicating early signs of optic nerve damage or visual field loss.

Apply this code when documentation confirms bilateral chronic angle-closure glaucoma with a specified mild stage. This diagnosis is typically supported by ophthalmological examination findings such as gonioscopy demonstrating angle closure, elevated intraocular pressure, and early optic nerve changes or visual field defects consistent with mild glaucoma.

• Ensure documentation explicitly states "chronic" and "bilateral" angle-closure glaucoma.
• Verify the stage of glaucoma (mild, moderate, severe, or unspecified) is clearly documented.
• Do not confuse with acute angle-closure glaucoma (H40.21-) or open-angle glaucoma (H40.1-).