Clinical Terms for Nystagmus and other irregular eye movements (H55)
Nystagmus, Pathologic-. Involuntary movements of the eye that are divided into two types, jerk and pendular. Jerk nystagmus has a slow phase in one direction followed by a corrective fast phase in the opposite direction, and is usually caused by central or peripheral vestibular dysfunction. Pendular nystagmus features oscillations that are of equal velocity in both directions and this condition is often associated with visual loss early in life.
Nystagmus, Physiologic-. Involuntary rhythmical movements of the eyes in the normal person. These can be naturally occurring as in end-position (end-point, end-stage, or deviational) nystagmus or induced by the optokinetic drum (NYSTAGMUS, OPTOKINETIC), caloric test, or a rotating chair.
Nystagmus, Optokinetic-. Normal nystagmus produced by looking at objects moving across the field of vision.
Nystagmus, Congenital-. Nystagmus present at birth or caused by lesions sustained in utero or at the time of birth. It is usually pendular, and is associated with ALBINISM and conditions characterized by early loss of central vision. Inheritance patterns may be X-linked, autosomal dominant, or recessive.
Diseases of the eye and adnexa (H00–H59)
Other disorders of eye and adnexa (H55-H57)
- H55 - Nystagmus and other irregular eye movements NON-BILLABLE CODE
- H55.0 - Nystagmus NON-BILLABLE CODE
- H55.00 - Unspecified nystagmus BILLABLE CODE
- H55.01 - Congenital nystagmus BILLABLE CODE
- H55.02 - Latent nystagmus BILLABLE CODE
- H55.03 - Visual deprivation nystagmus BILLABLE CODE
- H55.04 - Dissociated nystagmus BILLABLE CODE
- H55.09 - Other forms of nystagmus BILLABLE CODE
- H55.8 - Other irregular eye movements NON-BILLABLE CODE
- H55.81 - Deficient saccadic eye movements BILLABLE CODE UPDATED CODE
- H55.82 - Deficient smooth pursuit eye movements BILLABLE CODE NEW CODE
- H55.89 - Other irregular eye movements BILLABLE CODE
Nystagmus and other irregular eye movements (H55)