ICD-10 Code H33.101 – Unspecified retinoschisis, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H33.101 – Unspecified retinoschisis, right eye
What it is
H33.101 identifies retinoschisis in the right eye when the record does not specify the type. Retinoschisis means splitting of the retinal layers, which can affect vision and needs eye specialist evaluation.
Clinical signs
Patients may have reduced peripheral vision, blurred vision, or be asymptomatic. Examination may show a retinal splitting appearance; clinical features vary, so refer to documentation.
When to use this code
Use this code when the provider documents retinoschisis in the right eye but does not name a specific subtype. It also applies when the chart confirms retinal layer splitting without further detail. If the note later specifies a different eye or more precise diagnosis, code that instead.
Do not use for
Do not use this code for retinoschisis of the left eye or bilateral disease. Do not use it when the documentation states a more specific retinoschisis type; check documentation.
Coding tip
Code the eye and specificity exactly as documented, and query for clarification if the record only says “retinal splitting.”