Posterior corneal pigmentations, left eye

This code describes the presence of pigment deposits on the posterior surface of the cornea in the left eye. These pigmentations are typically observed during a slit lamp examination and can be a sign of various underlying ocular conditions, including pigment dispersion syndrome or glaucoma.

Use this code when documentation specifically indicates posterior corneal pigmentations affecting the left eye. This diagnosis is often made during a comprehensive ophthalmic examination where the clinician notes pigment deposition on the corneal endothelium. Supporting documentation should include findings from a slit lamp biomicroscopy.

• Ensure the documentation specifies "posterior" corneal pigmentations, as anterior pigmentations would be coded differently.
• Verify the laterality; this code is specific to the left eye. If both eyes are affected, separate codes for each eye or a bilateral code (if available) would be necessary.
• Investigate for any underlying causes such as pigment dispersion syndrome (H21.26-) or glaucoma (H40.-) and code them additionally if documented.