Low-tension glaucoma, unspecified eye, moderate stage

This code signifies a diagnosis of low-tension glaucoma, a type of open-angle glaucoma where optic nerve damage and visual field loss occur despite intraocular pressure (IOP) being within the statistically normal range. The "unspecified eye" indicates that the affected eye is not documented, and "moderate stage" denotes a specific level of disease progression based on visual field defects.

Apply this code when documentation confirms low-tension glaucoma with moderate visual field loss, but the specific eye (right or left) is not specified. This diagnosis is typically supported by findings from ophthalmic examinations, including optic nerve head assessment, visual field testing, and IOP measurements that remain within normal limits.

• Ensure documentation clearly states "low-tension glaucoma" and the "moderate stage" of the disease.
• Avoid using this code if the affected eye (right or left) is specified; use the more specific codes (H40.1212 or H40.1222).
• Always sequence this code after any underlying systemic conditions that may contribute to glaucoma, if applicable.