ICD-10 Code H35.123 – Retinopathy of prematurity, stage 1, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H35.123 – Retinopathy of prematurity, stage 1, bilateral
What it is
This code identifies mild retinopathy of prematurity affecting both eyes. It is used when premature infant retinal changes are documented as stage 1 in each eye.
Clinical signs
Stage 1 retinopathy is characterized by a thin demarcation line between vascular and avascular retina. Clinical features vary; refer to documentation.
When to use this code
Use H35.123 when the provider documents bilateral stage 1 retinopathy of prematurity. Apply it from ophthalmology or neonatal records when both eyes are specifically staged as 1. If laterality or stage is unclear, check documentation before assigning the code.
Do not use for
Do not use this code for unilateral disease, a different ROP stage, or a history of prematurity without active retinopathy. Check documentation if the record does not clearly state stage 1 in both eyes.
Coding tip
Code only when both stage and laterality are documented; otherwise, query the provider.