ICD-10 Code H35.1 – Retinopathy of Prematurity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H35.1 – Retinopathy of prematurity
What it is
H35.1 identifies retinopathy of prematurity, an eye disorder seen in premature infants. It reflects abnormal retinal blood vessel development and may range from mild changes to vision-threatening disease.
Clinical signs
Clinical features vary; refer to documentation. Common findings include retinal vascular immaturity, plus documented staging or zone findings from eye examinations in premature infants.
When to use this code
Use H35.1 when the provider documents retinopathy of prematurity, ROP, or a specific stage of the condition. It is appropriate for neonatal ophthalmology follow-up and coded based on the confirmed diagnosis. Check documentation if the note only mentions prematurity without retinal disease.
Do not use for
Do not use this code for general prematurity, nonspecific neonatal eye screening, or other retinal disorders without ROP documentation. If the record is unclear, check documentation.
Coding tip
Capture the provider’s exact ROP wording, including stage or laterality details when documented.