Low-tension glaucoma, bilateral, moderate stage

This code signifies a form of primary open-angle glaucoma where optic nerve damage and visual field loss occur despite intraocular pressure (IOP) consistently remaining within the statistically normal range. It indicates that both eyes are affected and the disease has progressed to a moderate stage, characterized by more extensive visual field defects but not yet reaching end-stage severity.

Apply this code when documentation confirms a diagnosis of low-tension glaucoma affecting both eyes, and visual field testing or other clinical assessments indicate a moderate stage of the disease. Supporting documentation should include IOP readings consistently below 21 mmHg, evidence of optic nerve damage (e.g., cupping, rim thinning), and visual field defects consistent with moderate progression.

• Ensure documentation explicitly states "low-tension glaucoma" or "normal-tension glaucoma" and specifies bilateral involvement.
• Confirm the stage of glaucoma (mild, moderate, severe, indeterminate) is clearly documented by the ophthalmologist.
• Do not confuse with other types of open-angle glaucoma where IOP is elevated; this code is specific to normal-tension cases.