Low-tension glaucoma, left eye, mild stage

This code signifies a form of primary open-angle glaucoma where optic nerve damage and visual field loss occur despite intraocular pressure (IOP) remaining within the statistically normal range. It specifically identifies the condition affecting the patient's left eye and indicates that the disease progression is in its mild stage.

Apply this code when documentation confirms a diagnosis of low-tension glaucoma in the left eye, supported by optic nerve damage and visual field defects, with IOP consistently below 21 mmHg. The "mild stage" designation should be explicitly stated or clearly inferred from clinical findings such as minimal optic disc cupping or early visual field loss.

• Ensure documentation specifies "low-tension" or "normal-tension" glaucoma, not just general open-angle glaucoma.
• Verify the affected eye (left) and the stage of the disease (mild) are clearly documented.
• Do not use this code if the intraocular pressure is elevated, even if optic nerve damage is present; instead, consider codes for primary open-angle glaucoma.