Chronic angle-closure glaucoma, unspecified eye, mild stage

This code signifies a chronic form of glaucoma characterized by a narrow or closed anterior chamber angle, leading to impaired aqueous humor outflow and elevated intraocular pressure. This specific instance indicates that the affected eye is not specified, and the disease progression is currently at a mild stage.

Use this code when documentation confirms chronic angle-closure glaucoma without specifying laterality (e.g., "chronic angle-closure glaucoma, unspecified eye") and explicitly states a "mild stage" of the disease. This is appropriate when the physician has not identified whether the right or left eye is affected, or if both are affected but not individually specified.

• Ensure documentation clearly states "unspecified eye" and "mild stage" for accurate code assignment.
• Avoid using this code if laterality (right or left eye) is documented; instead, select the appropriate H40.221- or H40.222- code.
• Do not confuse with acute angle-closure glaucoma (H40.21-) or other types of glaucoma.