Primary angle closure without glaucoma damage, unsp eye

This code signifies a condition where the drainage angle of the eye is anatomically narrow or closed, leading to a risk of increased intraocular pressure, but without any evidence of optic nerve damage or visual field loss characteristic of glaucoma. It represents a pre-glaucomatous state where the potential for angle closure glaucoma exists.

Use this code when documentation indicates a diagnosis of primary angle closure, such as a narrow or closed anterior chamber angle identified via gonioscopy, but specifically states that there is no associated glaucomatous optic neuropathy or visual field defects. This is often an incidental finding during a routine eye exam or when evaluating for other ocular conditions.

• Ensure the documentation explicitly states "without glaucoma damage" to differentiate from angle closure glaucoma.
• Do not use this code if there is any evidence of optic nerve damage or visual field loss; instead, consider codes from the H40.2- category.
• If the specific eye (right or left) is documented, use the more specific codes H40.061 or H40.062.