ICD-10 Code H33.191 – Other retinoschisis and retinal cysts, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H33.191 – Other retinoschisis and retinal cysts, right eye
What it is
This code identifies retinoschisis or retinal cysts affecting the right eye when the condition does not fit a more specific retinal diagnosis. It is used for a documented structural separation or cystic change in the retina.
Clinical signs
Findings may include a split within the retinal layers, a localized retinal cyst, or incidental retinal elevation on examination. Clinical features vary; refer to documentation.
When to use this code
Use H33.191 when the provider documents other retinoschisis or retinal cysts in the right eye and no more specific retinal code applies. It is appropriate when laterality is clear and the record supports the diagnosis. If the note only says “retinal abnormality,” check documentation.
Do not use for
Do not use this code for left eye, bilateral disease, or unspecified laterality. Do not use it for retinal detachment, tears, or other clearly different retinal disorders.
Coding tip
Confirm that the provider names retinoschisis or retinal cysts and specifies the right eye before assigning this code.