Intermittent angle-closure glaucoma, right eye

This code signifies a form of glaucoma characterized by episodic closure of the anterior chamber angle in the right eye, leading to sudden increases in intraocular pressure. These episodes are typically transient and resolve spontaneously or with intervention, differentiating it from chronic angle-closure glaucoma.

Apply this code when documentation specifies intermittent or episodic angle-closure glaucoma affecting the patient's right eye. This diagnosis is supported by findings of elevated intraocular pressure during acute attacks, a narrow or occludable angle on gonioscopy, and resolution of symptoms between episodes.

• Differentiate carefully from chronic angle-closure glaucoma (H40.21-) and acute angle-closure glaucoma (H40.22-), which imply persistent or sudden, severe onset, respectively.
• Ensure laterality is clearly documented as "right eye" to support this specific code.
• Consider additional codes for any associated complications or underlying causes, if documented.