ICD-10 Code H33.1 – Retinoschisis and retinal cysts (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H33.1 – Retinoschisis and retinal cysts
What it is
H33.1 identifies retinoschisis, a splitting of the retinal layers, and retinal cysts. Use it when the diagnosis specifically involves these structural retinal changes.
Clinical signs
Findings may include peripheral or macular retinal splitting, a translucent elevated retina, or cystic-appearing spaces on exam. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents retinoschisis or retinal cysts as the confirmed diagnosis. It also fits follow-up visits for a known retinal split or cystic retinal lesion.
If the note only describes retinal detachment, tear, or another retinal disorder, do not assume H33.1. Check documentation for the exact retinal condition before coding.
Do not use for
Do not use H33.1 for retinal detachment, retinal tear, or nonspecific visual complaints. If the record says only “retinal abnormality,” check documentation.
Coding tip
Code H33.1 only when the provider names retinoschisis or retinal cysts; otherwise, query for a more specific retinal diagnosis.