ICD-10 Code H33.102 – Unspecified retinoschisis, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H33.102 – Unspecified retinoschisis, left eye
What it is
Use this code for retinoschisis affecting the left eye when the record does not specify the type. Retinoschisis is a splitting of the retinal layers.
Clinical signs
Findings may include reduced vision, peripheral visual field changes, or an incidental retinal splitting on examination. Clinical features vary; refer to documentation.
When to use this code
Assign H33.102 when the provider documents retinoschisis in the left eye but does not identify a specific subtype. Use it for confirmed left-eye retinoschisis on ophthalmic exam or imaging when the note remains nonspecific.
If the chart later identifies a more specific retinoschisis diagnosis, code that documented condition instead. Check documentation for laterality and exact terminology.
Do not use for
Do not use this code for retinoschisis in the right eye, both eyes, or unspecified eye laterality. Do not use it when the documentation describes a different retinal disorder.
Coding tip
Verify laterality and whether the provider truly means retinoschisis before coding, because unspecified retinal findings often need a more precise diagnosis.