Glaucoma secondary to eye inflammation, left eye, stage unsp

This code signifies elevated intraocular pressure (IOP) in the left eye resulting from an inflammatory process within the eye. The specific stage or severity of the glaucoma is not documented or determined. This condition can lead to optic nerve damage and vision loss if left untreated.

Apply this code when documentation clearly indicates glaucoma in the left eye that is directly attributable to an underlying ocular inflammatory condition (e.g., uveitis, iritis). The medical record must specify the left eye and lack information regarding the glaucoma stage.

• Ensure documentation explicitly links the glaucoma to an inflammatory cause, not other secondary etiologies.
• Always code the underlying inflammatory condition first, followed by this glaucoma code.
• If the stage of glaucoma is known (e.g., mild, moderate, severe), a more specific code from the H40.42 category should be used.