2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Nervous System And Sense Organs 320-389 > Disorders Of The Eye And Adnexa 360-379 > Other Disorders Of Eye 379.* > 2006 ICD-9-CM Diagnosis 379.50 Nystagmus unspecified View the most recent version of ICD-9-CM 379.50 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. Involuntary movements of the eyeballs. The presence or absence of nystagmus is often used in the diagnosis of a variety of neurological and visual disorders. 379.50 is a specific code that can be used to specify a diagnosis 379.50 contains 1 index entry View the ICD-9-CM Volume 1 379.* hierarchy  Index entries containing 379.50: Nystagmus 379.50 associated with vestibular system disorders 379.54 benign paroxysmal positional 386.11 central positional 386.2 congenital 379.51 deprivation 379.53 dissociated 379.55 latent 379.52 miners' 300.89 positional benign paroxysmal 386.11 central 386.2 specified NEC 379.56 vestibular 379.54 visual deprivation 379.53