ICD-10 Code H35.143 – Retinopathy of prematurity, stage 3, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H35.143 – Retinopathy of prematurity, stage 3, bilateral
What it is
This code identifies retinopathy of prematurity affecting both eyes at stage 3. It describes abnormal retinal blood vessel growth in a premature infant, with a level of severity documented as stage 3.
Clinical signs
Stage 3 disease is defined by extraretinal fibrovascular proliferation, and bilateral involvement means both eyes are affected. Clinical features vary; refer to documentation.
When to use this code
Use H35.143 when the provider documents retinopathy of prematurity, stage 3, in both eyes. Apply it when the record clearly states bilateral disease, whether found on screening or ophthalmology examination.
If the chart only says retinopathy of prematurity without stage or laterality, check documentation before coding. You need both the stage and bilateral involvement to support this code.
Do not use for
Do not use this code for unilateral retinopathy of prematurity, another stage, or unspecified stage. Do not use it when the diagnosis is not documented as bilateral.
Coding tip
Confirm both the stage and laterality in the ophthalmology note before assigning H35.143.