Low-tension glaucoma, unspecified 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) being consistently within the statistically normal range. It indicates a mild stage of the disease, meaning minimal optic nerve damage and visual field defects.

Use this code when documentation confirms a diagnosis of low-tension glaucoma, also known as normal-tension glaucoma, in an unspecified eye, and the severity is explicitly stated as mild. Supporting documentation should include IOP readings, optic nerve head evaluation (e.g., cupping, rim thinning), visual field testing results, and a physician's assessment of mild disease progression.

• Ensure the documentation specifies "low-tension" or "normal-tension" glaucoma, not just general open-angle glaucoma.
• Verify the stage of glaucoma is clearly documented as "mild"; avoid using this code for moderate or severe stages.
• This code is for an unspecified eye; if the affected eye (right or left) is known, a more specific code should be used.