Lattice corneal dystrophy, bilateral

This code signifies a bilateral inherited corneal disorder characterized by the deposition of amyloid protein in the corneal stroma, leading to a lattice-like pattern. This progressive dystrophy can cause recurrent corneal erosions, pain, and significant vision impairment in both eyes.

Apply this code when documentation confirms the diagnosis of lattice corneal dystrophy affecting both the right and left eyes. This diagnosis is typically made through slit-lamp examination revealing the characteristic refractile lines and opacities in the corneal stroma.

• Ensure documentation explicitly states "bilateral" involvement; otherwise, use the appropriate unilateral code.
• Distinguish from other corneal dystrophies (e.g., granular, macular) which have different ICD-10-CM codes.
• Code any associated complications, such as corneal erosion (T85.69x-), in addition to the dystrophy.