Chronic angle-closure glaucoma, bilateral, moderate stage

This code signifies a chronic form of glaucoma where the iris blocks the drainage angle of the eye, leading to increased intraocular pressure, affecting both eyes. The condition has progressed to a moderate stage, indicating some visual field loss and/or optic nerve damage.

Apply this code when documentation confirms chronic angle-closure glaucoma affecting both eyes, with a physician's assessment of moderate stage. This typically involves findings of gonioscopy, tonometry, visual field testing, and optic nerve evaluation.

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