Chronic angle-closure glaucoma, right eye, severe stage

This code signifies a chronic form of angle-closure glaucoma affecting the right eye, where the iris blocks the drainage angle, leading to increased intraocular pressure. The "severe stage" indicates significant and irreversible optic nerve damage and visual field loss.

Apply this code when documentation clearly states chronic angle-closure glaucoma in the right eye, along with a confirmed severe stage of the disease. This typically involves findings of extensive visual field defects, significant optic disc cupping, and high intraocular pressure despite treatment.

• Ensure the documentation specifies "chronic" and not "acute" or "intermittent" angle-closure glaucoma.
• Laterality (right eye) and the severity stage ("severe") must be explicitly documented to support this specific code.
• Do not confuse with codes for open-angle glaucoma or other types of glaucoma, as the pathophysiology and treatment differ.