Preglaucoma, unspecified, unspecified eye

This code signifies a state where a patient exhibits risk factors for developing glaucoma, such as elevated intraocular pressure (ocular hypertension), but without any definitive signs of optic nerve damage or visual field loss. It indicates a pre-glaucomatous condition where the specific type of preglaucoma and the affected eye are not documented.

Use this code when the physician documents "preglaucoma" or "ocular hypertension" without specifying the type (e.g., primary open-angle preglaucoma) and without indicating laterality. This code is appropriate when the patient is being monitored for glaucoma development due to risk factors.

• Avoid using this code if the documentation specifies the type of preglaucoma (e.g., H40.01- for open-angle preglaucoma).
• Do not use if there is any evidence of optic nerve damage or visual field loss, as that would indicate actual glaucoma (H40.1- to H40.9-).
• Always strive for greater specificity regarding the type of preglaucoma and laterality if documented.