Lattice corneal dystrophy, unspecified eye

This code represents a rare, inherited corneal dystrophy characterized by the deposition of amyloid protein in the corneal stroma, forming lattice-like patterns. These deposits can lead to recurrent corneal erosions, pain, and progressive vision impairment due to corneal opacification. The "unspecified eye" designation indicates that the laterality of the condition is not documented.

Use this code when the medical record clearly documents a diagnosis of lattice corneal dystrophy, but the specific eye affected (right or left) is not specified. This code is appropriate when the physician's documentation confirms the presence of the characteristic lattice-like stromal opacities.

• Avoid using this code if the medical record specifies laterality; instead, use the more specific codes for right (H18.541) or left (H18.542) eye.
• Ensure the documentation supports the diagnosis of lattice corneal dystrophy, differentiating it from other corneal dystrophies.
• Consider sequencing this code as a primary diagnosis if it is the main reason for the patient's encounter.