ICD-10 Code H18.543 – Lattice corneal dystrophy, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.543 – Lattice corneal dystrophy, bilateral
What it is
This code identifies lattice corneal dystrophy affecting both eyes. It is a hereditary corneal disorder with amyloid deposits in the cornea that can reduce visual clarity over time.
Clinical signs
Typical findings include branching, lattice-like corneal opacities, recurrent corneal erosions, and gradual visual disturbance. Clinical features vary; refer to documentation.
When to use this code
Use H18.543 when the provider documents bilateral lattice corneal dystrophy or equivalent wording affecting both corneas. Apply it when the diagnosis is confirmed in the chart, ophthalmology note, or problem list. If laterality is not specified, check documentation before coding.
Do not use for
Do not use this code for other corneal dystrophies, corneal scars, or nonspecific corneal opacities. Check documentation if the record does not clearly state bilateral involvement.
Coding tip
Confirm both the diagnosis and laterality in the ophthalmology note before assigning H18.543.