Retinopathy of prematurity, stage 1, left eye

This code describes a mild form of retinopathy of prematurity (ROP) affecting the left eye, characterized by a demarcation line separating vascularized from avascular retina. This stage indicates early abnormal retinal vessel development in premature infants.

Use this code when documentation specifies a diagnosis of retinopathy of prematurity, stage 1, in the left eye. This diagnosis is typically made by an ophthalmologist during a retinal examination of a premature infant. Supporting documentation would include ophthalmology notes detailing the stage and affected eye.

• Ensure the documentation clearly specifies "stage 1" and "left eye" to accurately assign this code.
• Do not confuse with other stages of ROP (e.g., H35.13- for stage 2, H35.14- for stage 3).
• Laterality is crucial; confirm whether the condition affects the left, right, or both eyes.