ICD-10 Code H18.532 – Granular corneal dystrophy, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.532 – Granular corneal dystrophy, left eye
What it is
This code identifies granular corneal dystrophy affecting the left eye. It is a hereditary corneal disorder marked by deposits in the corneal stroma that can gradually affect vision.
Clinical signs
Typical findings include discrete white or gray corneal opacities, often described as breadcrumb-like or granular. Clinical features vary; refer to documentation for laterality, severity, and whether vision is affected.
When to use this code
Use H18.532 when the record specifically documents granular corneal dystrophy in the left eye. Choose this code when the diagnosis is confirmed and laterality is clearly stated. If the note only says corneal dystrophy without type or eye, check documentation.
Do not use for
Do not use this code for other corneal dystrophies, corneal scars, or nonspecific corneal opacities. If the provider does not identify the left eye or the granular type, check documentation.
Coding tip
Verify both the dystrophy type and laterality before assigning H18.532.