Pigmentary glaucoma, left eye, stage unspecified

This code signifies pigmentary glaucoma affecting the left eye, where the specific stage of the condition has not been documented. Pigmentary glaucoma is a secondary open-angle glaucoma characterized by the dispersion of pigment from the iris, which then clogs the trabecular meshwork, leading to increased intraocular pressure and optic nerve damage.

Use this code when documentation clearly indicates a diagnosis of pigmentary glaucoma in the patient's left eye, but the ophthalmologist has not specified the stage of the disease (e.g., mild, moderate, severe). This code is appropriate when the medical record confirms the presence of pigmentary glaucoma and laterality, but omits staging information.

• Always confirm laterality (left eye) and the absence of a documented stage before assigning this code.
• If a stage is documented, a more specific code from the H40.13- subcategory should be used.
• Code any associated ocular hypertension or other related conditions separately.