Glaucoma secondary to eye inflam, left eye, severe stage

This code signifies a severe stage of glaucoma that has developed as a direct consequence of inflammation within the left eye. This secondary glaucoma involves elevated intraocular pressure (IOP) leading to optic nerve damage and visual field loss, specifically affecting the left eye due to an underlying inflammatory process.

Use this code when documentation clearly indicates glaucoma in the left eye, explicitly stating it is secondary to an inflammatory condition (e.g., uveitis, iritis) and has progressed to a severe stage. Supporting documentation would include ophthalmologist notes detailing the inflammatory etiology, elevated IOP, optic nerve damage, visual field defects, and a confirmed severe stage diagnosis for the left eye.

• Ensure the documentation specifies "left eye" and "severe stage" for accurate coding.
• Always code the underlying inflammatory condition first, followed by this secondary glaucoma code.
• Differentiate from primary open-angle glaucoma (H40.1x) or other types of secondary glaucoma (H40.4x) based on the documented etiology.