Intermittent angle-closure glaucoma, unspecified eye

This code describes a form of glaucoma characterized by episodes of elevated intraocular pressure (IOP) due to temporary closure of the anterior chamber angle, which impedes aqueous humor outflow. Between attacks, the angle may reopen, and IOP returns to normal. This specific code indicates that the affected eye is not specified.

Use this code when documentation clearly indicates intermittent angle-closure glaucoma without specifying laterality (e.g., "intermittent angle-closure glaucoma, bilateral" or "intermittent angle-closure glaucoma, right eye"). This diagnosis is typically made based on tonometry readings during and between attacks, gonioscopy findings, and patient-reported symptoms like blurred vision or eye pain.

• Avoid using this code if the documentation specifies laterality (e.g., right, left, or bilateral); instead, use the more specific codes H40.231, H40.232, or H40.233.
• Ensure the "intermittent" nature of the angle closure is documented, distinguishing it from chronic angle-closure glaucoma.
• Consider sequencing this code with codes for associated symptoms or complications if applicable and supported by documentation.