ICD-10 Code H53.421 – Scotoma of blind spot area, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H53.421 – Scotoma of blind spot area, right eye
What it is
This code identifies a localized visual field defect in the blind spot area of the right eye. It means the patient has a scotoma, or small area of missing vision, documented specifically in the right eye.
Clinical signs
You may see complaints of a missing spot in vision, reduced awareness of objects in part of the visual field, or abnormal perimetry findings. Clinical features vary; refer to documentation.
When to use this code
Use H53.421 when the record clearly documents a scotoma affecting the blind spot area of the right eye. This is appropriate when the provider specifies laterality and the defect is not described more generally. Check documentation if the note only says visual disturbance or field loss.
Do not use for
Do not use this code for unspecified scotoma, left eye findings, or bilateral visual field defects. If the chart does not confirm the blind spot area or right-eye laterality, check documentation.
Coding tip
Match the code to the documented eye and exact visual field location before assigning it.