ICD-10 Code H33.199 – Other retinoschisis and retinal cysts, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H33.199 – Other retinoschisis and retinal cysts, unspecified eye
What it is
This code identifies retinoschisis or a retinal cyst when the affected eye is not specified in the documentation. Use it for a documented retinal splitting or cystic change that does not fit a more specific code.
Clinical signs
Clinical features vary; refer to documentation. Findings may include a retinal separation or cyst-like retinal change on examination, imaging, or specialist assessment.
When to use this code
Use H33.199 when the record documents other retinoschisis or retinal cysts but does not identify the right or left eye. It also fits when the provider confirms the condition without enough detail for a more specific laterality code. If the note names another retinal disorder instead, do not assign this code.
Do not use for
Do not use this code for retinal detachment, tears, or other clearly different retinal conditions. If the documentation specifies the eye, choose the laterality-specific code instead.
Coding tip
Check the ophthalmology note for laterality and exact retinal diagnosis before selecting this unspecified-eye code.