Congenital nystagmus

This code identifies an involuntary, rhythmic oscillation of the eyes that is present at birth or manifests shortly thereafter. It is a neurological condition affecting eye movement control, often resulting in reduced visual acuity. The nystagmus can be horizontal, vertical, torsional, or a combination.

Apply this code when documentation explicitly states "congenital nystagmus" or describes nystagmus identified as present since birth or early infancy. This code is appropriate for initial diagnoses and subsequent encounters for ongoing management of the condition. Supporting documentation includes ophthalmology reports, pediatric neurological evaluations, and physician notes detailing the onset and nature of the nystagmus.

• Do not confuse with acquired nystagmus, which has different underlying causes and codes.
• Always review documentation to confirm the congenital nature; if onset is not specified as congenital, further clarification may be needed.
• Code any associated visual impairments or underlying neurological conditions separately.