Low-tension glaucoma, left eye, severe stage

This code signifies a diagnosis of low-tension glaucoma affecting the left eye, indicating significant optic nerve damage and visual field loss despite intraocular pressure (IOP) being within the statistically normal range. It represents a form of primary open-angle glaucoma where the characteristic optic neuropathy occurs without elevated IOP. The "severe stage" denotes advanced disease progression.

Apply this code when documentation confirms a diagnosis of low-tension glaucoma in the left eye, specifically noting a severe stage of the disease. This typically involves detailed ophthalmological examination findings, including optic disc cupping, visual field defects, and IOP measurements that are consistently within the normal range.

• Ensure documentation explicitly states "low-tension" or "normal-tension" glaucoma to differentiate from other types of glaucoma.
• Verify the affected eye (left) and the severity stage (severe) are clearly documented to support the specificity of this code.
• Always sequence glaucoma codes based on the reason for the encounter, and consider any associated conditions or complications.