Primary open-angle glaucoma, bilateral, stage unspecified

This code signifies a chronic eye condition characterized by damage to the optic nerve due to elevated intraocular pressure, affecting both eyes. It represents the most common form of glaucoma where the drainage angle of the eye remains open, but fluid outflow is impaired. The specific stage of the disease progression is not documented or determined.

This code is appropriate when a patient has been diagnosed with primary open-angle glaucoma in both eyes, and the medical record does not specify the stage of the disease (e.g., mild, moderate, severe, or indeterminate). Documentation should clearly indicate bilateral involvement and the "open-angle" type of glaucoma.

• Do not use this code if the stage of glaucoma is documented; instead, select a more specific code from the H40.11 category.
• Ensure documentation explicitly states "bilateral" involvement; otherwise, consider codes for unilateral or unspecified eye involvement.
• Distinguish from secondary open-angle glaucoma (H40.3-H40.6), which has an identifiable underlying cause.