Posterior corneal pigmentations, bilateral

This code represents the presence of pigment deposits on the posterior surface of the cornea in both eyes. These pigmentations can be a benign finding or indicate an underlying ocular condition such as pigment dispersion syndrome or pseudoexfoliation syndrome.

Use this code when documentation specifies posterior corneal pigmentations affecting both eyes. This often occurs during a slit lamp examination where the ophthalmologist notes pigment on the corneal endothelium. It is crucial to use this code when the laterality is explicitly stated as bilateral.

• Ensure the documentation clearly specifies "posterior" corneal pigmentations and not anterior or stromal.
• Verify that both eyes are affected; if only one eye is involved, use the appropriate unilateral code (H18.051 or H18.052).
• Consider coding any underlying conditions causing the pigmentations, such as pigment dispersion syndrome (H21.11x) or pseudoexfoliation syndrome (H21.5x), as primary diagnoses when applicable.