Chronic angle-closure glaucoma, left eye, mild stage

This code signifies a chronic form of glaucoma where the iris blocks the drainage angle of the left eye, leading to increased intraocular pressure and optic nerve damage. The "mild stage" indicates early optic nerve damage with corresponding visual field defects that are not extensive. This condition is progressive and can lead to irreversible vision loss if untreated.

Use this code when documentation confirms chronic angle-closure glaucoma affecting the left eye, with a clear indication of mild-stage involvement based on visual field testing and optic nerve assessment. This typically applies to patients presenting with initial diagnosis or follow-up care where the disease progression remains in the mild stage. Documentation should specify the laterality and the stage of the glaucoma.

• Ensure the medical record explicitly states "chronic" and "angle-closure" to differentiate from acute or open-angle forms.
• Verify laterality (left eye) is clearly documented; codes exist for right, bilateral, and unspecified eyes.
• Confirm the stage (mild) is supported by clinical findings, such as visual field mean deviation or optic disc changes.