Unspecified nystagmus

This code represents an involuntary, rhythmic oscillation of the eyes where the specific type or cause of the nystagmus has not been documented. It indicates the presence of abnormal eye movements without further characterization of its direction, amplitude, or associated conditions.

Use this code when the medical record clearly states "nystagmus" but provides no additional details regarding its classification (e.g., congenital, acquired, vestibular, gaze-evoked). This code is appropriate when the physician has diagnosed nystagmus but further diagnostic workup is pending or the specific type is unknown.

• Avoid using this code if the documentation specifies any particular type of nystagmus; more specific codes are available.
• Query the provider for more detailed information if the documentation simply states "nystagmus" to allow for more precise coding.
• This code should be sequenced as a primary diagnosis when nystagmus is the reason for the encounter, or as a secondary diagnosis if it's a co-existing condition.