Unspecified open-angle glaucoma, indeterminate stage

This code signifies a form of glaucoma characterized by an open anterior chamber angle, where the specific type of open-angle glaucoma cannot be determined. The disease progression is also unknown, meaning the extent of optic nerve damage or visual field loss has not been assessed or documented.

Use this code when the medical record clearly indicates a diagnosis of open-angle glaucoma, but the physician has not specified a more definitive type (e.g., primary, low-tension, pigmentary). It is also appropriate when the stage of the glaucoma (e.g., mild, moderate, severe) is not documented or cannot be determined from the available clinical information.

• Avoid using this code if a more specific type of open-angle glaucoma (e.g., H40.11 for primary open-angle glaucoma) is documented.
• Ensure documentation supports the "indeterminate stage" aspect; if a stage is known, a more specific code should be used.
• Always sequence this code after any underlying systemic conditions contributing to secondary glaucoma, if applicable.