ICD-10 Code H18.531 – Granular Corneal Dystrophy, Right Eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.531 – Granular corneal dystrophy, right eye
What it is
Granular corneal dystrophy is a hereditary corneal disorder with breadcrumb-like opacities in the cornea. This code specifies involvement of the right eye only.
Clinical signs
Typical findings include discrete white or gray corneal deposits, usually in the central stroma, with slowly progressive visual disturbance. Clinical features vary; refer to documentation.
When to use this code
Use H18.531 when the provider documents granular corneal dystrophy affecting the right eye alone. It may be appropriate for ophthalmology visits, follow-up exams, or problem-list coding when the diagnosis is confirmed. If both eyes are involved, check documentation and code laterality correctly.
Do not use for
Do not use this code for unspecified corneal dystrophy or for left-eye or bilateral disease. If the record does not clearly identify the right eye, check documentation.
Coding tip
Confirm laterality in the assessment or impression before assigning H18.531.