ICD-10 Code H18.551 – Macular Corneal Dystrophy, Right Eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.551 – Macular corneal dystrophy, right eye
What it is
H18.551 identifies macular corneal dystrophy affecting the right eye. This is a hereditary corneal disorder that causes progressive clouding of the cornea and can reduce vision.
Clinical signs
Clinical features may include corneal haze, scattered stromal opacities, and gradual visual decline. Findings are usually confirmed by eye examination; clinical features vary, so refer to documentation.
When to use this code
Use this code when the provider documents macular corneal dystrophy in the right eye specifically. It also applies when the record clearly links the corneal dystrophy to the right eye on examination or assessment. If laterality is not stated, check documentation.
Do not use for
Do not use this code for corneal dystrophy in the left eye, bilateral disease, or an unspecified eye. It is also wrong for nonspecific corneal opacity without a documented dystrophy.
Coding tip
Assign laterality only when the note clearly identifies the right eye; otherwise, query or code the unspecified option if available.