ICD-10 Code H35.12 – Retinopathy of prematurity, stage 1 (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H35.12 – Retinopathy of prematurity, stage 1
What it is
Use this code for the earliest stage of retinopathy of prematurity, a retinal disorder seen in premature infants. It indicates abnormal retinal vascular development with a mild demarcation between vascular and avascular retina.
Clinical signs
Clinical features vary; refer to documentation. Stage 1 is identified on eye examination by a thin demarcation line at the junction of vascular and avascular retina, without ridge formation.
When to use this code
Assign this code when the provider documents stage 1 retinopathy of prematurity for a premature infant. Use it for ophthalmology findings from screening exams, neonatal follow-up, or consult notes that clearly state stage 1.
If the record only says retinopathy of prematurity without a stage, check documentation before coding. Code the highest documented stage if multiple stages are mentioned in the same encounter.
Do not use for
Do not use this code for other stages of retinopathy of prematurity or for unspecific retinal findings. Check documentation if the note describes retinal disease not clearly tied to prematurity.
Coding tip
Confirm the documented stage from the eye exam note; stage 1 is not the same as more advanced ridge or plus disease.