Primary open-angle glaucoma, right eye, severe stage

This code signifies primary open-angle glaucoma affecting the right eye, where the disease has progressed to a severe stage. This condition is characterized by optic nerve damage and visual field loss due to elevated intraocular pressure, without identifiable secondary causes, and with significant functional impairment.

Apply this code when documentation clearly indicates a diagnosis of primary open-angle glaucoma in the patient's right eye, and the ophthalmologist has explicitly staged the condition as "severe." This typically involves extensive visual field defects, significant optic nerve cupping, and often high intraocular pressures despite treatment.

• Ensure the documentation specifies "primary open-angle glaucoma" and not another type of glaucoma.
• Laterality (right eye) and stage (severe) must be clearly documented by the provider.
• Do not use this code if the glaucoma is mild, moderate, indeterminate, or if the specific stage is not documented.