H40.42X1
ICD-10-CMThis code signifies a type of secondary glaucoma affecting the left eye, specifically caused by inflammation within the eye. It indicates that the condition is currently in its mildest stage of progression. This form of glaucoma results from inflammatory processes that disrupt the normal outflow of aqueous humor, leading to increased intraocular pressure.
Apply this code when documentation clearly states a diagnosis of glaucoma in the left eye, directly attributed to an underlying inflammatory condition (e.g., uveitis, iritis). The medical record must also specify that the glaucoma is in a "mild" stage. This code is appropriate when the inflammation is the primary etiology of the elevated intraocular pressure and subsequent optic nerve damage.
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