Primary open-angle glaucoma, left eye, indeterminate stage

This code signifies a diagnosis of primary open-angle glaucoma affecting the left eye, where the severity or stage of the disease cannot be definitively determined. This form of glaucoma is characterized by optic nerve damage and visual field loss, typically due to elevated intraocular pressure, without an identifiable secondary cause. The "indeterminate stage" indicates that the extent of damage is not yet classifiable into mild, moderate, or severe.

Use this code when documentation confirms primary open-angle glaucoma in the left eye, but the physician explicitly states that the stage of the disease is indeterminate or cannot be assessed. This often occurs in initial diagnoses, when baseline testing is incomplete, or when the patient's condition makes staging difficult. Supporting documentation should clearly specify the affected eye and the inability to stage the glaucoma.

• Ensure the documentation explicitly states "indeterminate stage" for the left eye; otherwise, a more specific stage code should be used.
• Do not use this code if the stage is known but not documented; query the provider for clarification.
• Verify laterality carefully; separate codes exist for the right eye, bilateral, and unspecified eyes.