Primary open-angle glaucoma, bilateral, severe stage

This code identifies primary open-angle glaucoma affecting both eyes, indicating a severe stage of the disease. This condition is characterized by progressive optic nerve damage and visual field loss due to elevated intraocular pressure, without an identifiable secondary cause. The severe stage implies significant and irreversible vision impairment.

Apply this code when documentation explicitly states bilateral primary open-angle glaucoma and specifies a severe stage. This is typically supported by ophthalmological reports detailing visual field defects, optic nerve head damage, and intraocular pressure readings consistent with severe disease in both eyes.

• Ensure documentation clearly specifies "primary" open-angle glaucoma and "bilateral" involvement.
• Verify the "severe stage" is explicitly stated or clearly inferred from visual field loss and optic nerve damage descriptions.
• Do not use for other types of glaucoma (e.g., secondary, angle-closure) or for unilateral involvement.