Glaucoma secondary to oth eye disord, left eye, mild stage

This code signifies elevated intraocular pressure and optic nerve damage in the left eye, resulting from an underlying ocular condition other than trauma, inflammation, or medication. It indicates a mild stage of the disease, implying early or limited functional impairment. This form of glaucoma is a consequence of another eye pathology affecting aqueous humor dynamics.

Apply this code when documentation specifies secondary glaucoma in the left eye due to a pre-existing ocular disorder (e.g., retinal detachment, intraocular tumor, or congenital anomalies) and the stage is explicitly noted as mild. The physician's notes must clearly link the glaucoma to the primary eye condition and confirm the affected eye and severity.

• Ensure the documentation specifies "left eye" and "mild stage" to accurately assign this code.
• Always code the underlying primary eye disorder first, followed by this secondary glaucoma code.
• Distinguish from primary open-angle glaucoma (H40.1x) and other forms of secondary glaucoma (e.g., H40.3x for post-traumatic, H40.4x for inflammatory).