ICD-10 Code H18.523 – Epithelial (juvenile) corneal dystrophy, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.523 – Epithelial (juvenile) corneal dystrophy, bilateral
What it is
This code identifies bilateral epithelial, or juvenile, corneal dystrophy affecting both eyes. It refers to an inherited corneal disorder that alters the outer corneal layer and can reduce visual clarity.
Clinical signs
Typical findings include bilateral corneal epithelial irregularity, recurrent erosions, or visually significant surface changes. Clinical features vary; refer to documentation.
When to use this code
Use H18.523 when the provider documents epithelial corneal dystrophy in both eyes, including juvenile or epithelial basement membrane-type descriptions tied to bilateral disease. Code it when the diagnosis is established and laterality is specifically bilateral. Check documentation if the note only says corneal dystrophy without eye laterality.
Do not use for
Do not use this code for unilateral corneal dystrophy or for other corneal dystrophies with different names or layers involved. If the record does not confirm bilateral epithelial disease, check documentation.
Coding tip
Confirm that the provider documents both eyes and the epithelial dystrophy type before assigning H18.523.