List of ICD-9 codes 320–359: diseases of the nervous system
6a. Diseases of the nervous system (320–359)
Inflammatory diseases of the central nervous system (320–327)
- (320) Bacterial meningitis
- (321) Meningitis due to other organisms
- (322) Meningitis of unspecified cause
- (323) Encephalitis, myelitis, and encephalomyelitis
- (324) Intracranial and intraspinal abscess
- (325) Phlebitis and thrombophlebitis of intracranial venous sinuses
- (326) Late effects of intracranial abscess or pyogenic infection
- (327) Sleep disorders
- (327.0) Organic insomnia
- (327.1) Organic hypersomnia
- (327.2) Organic sleep apnea
- (327.3) Circadian rhythm sleep disorder
- (327.4) Organic parasomnia
- (327.5) Organic sleep related movement disorders
- (327.8) Other organic sleep disorders
Hereditary and degenerative diseases of the central nervous system (330–337)
- (330) Cerebral degenerations usually manifest in childhood
- (331) Other cerebral degenerations
- (331.0) Alzheimer's
- (331.1) Pick's disease
- (331.2) Senile degeneration of brain
- (331.3) Communicating hydrocephalus
- (331.4) Obstructive hydrocephalus
- (331.5) Idiopathic normal pressure hydrocephalus
- (331.8) Other cerebral degeneration
- (331.81) Reye's syndrome
- (331.82) Dementia with Lewy bodies
- (331.83) Mild cognitive impairment, so stated
- (332) Parkinson's disease
- (332.0) Parkinsonism, primary
- (333) Other extrapyramidal disease and abnormal movement disorders
- (333.0) Other degenerative diseases of the basal ganglia
- (333.1) Essential tremor/familial tremor
- (333.2) Myoclonus
- (333.4) Huntington's chorea
- (333.8) Fragments of torsion dystonia
- (333.9) Other and unspecified extrapyramidal diseases and abnormal movement disorders
- (333.99) Other extrapyramidal diseases and abnormal movement disorders
- (334) Spinocerebellar disease
- (334.0) Friedreich's ataxia
- (334.1) Hereditary spastic paraplegia
- (334.2) Primary cerebellar degeneration
- (334.3) Other cerebellar ataxia
- (334.4) Cerebellar ataxia in diseases classified elsewhere
- (334.8) Other spinocerebellar diseases
- Ataxia-telangiectasia [Louis-Bar syndrome]
- Corticostriatal-spinal degeneration
- (334.9) Spinocerebellar disease unspecified
- (335) Anterior horn cell disease
- (335.2) Motor neuron disease
- (335.20) Amyotrophic lateral sclerosis
- (335.21) Progressive muscular atrophy
- (335.22) Progressive bulbar palsy
- (335.23) Pseudobulbar palsy
- (335.24) Primary lateral sclerosis
- (335.29) Other motor neuron diseases
- (335.2) Motor neuron disease
- (336) Other diseases of spinal cord
- (336.0) Syringomyelia and syringobulbia
- (337) Disorders of the autonomic nervous system
- (337.0) Idiopathic peripheral autonomic neuropathy
- (337.1) Peripheral autonomic neuropathy in disorders classified elsewhere
- (337.2) Reflex sympathetic dystrophy
- (337.3) Autonomic dysreflexia
- (337.9) Unspecified disorder of autonomic nervous system
Pain (338–338)
- (338) Pain, not elsewhere classified
- (338.0) Central pain syndrome
- (338.1) Acute pain
- (338.2) Chronic pain
- (338.3) Neoplasm related pain (acute) (chronic)
- (338.4) Chronic pain syndrome
Other headache syndromes (339–339)
- (339) Other headache syndromes
- (339.0) Cluster headaches and other trigeminal autonomic cephalgias
- (339.00) Cluster headache syndrome, unspecified
- (339.01) Episodic cluster headache
- (339.02) Chronic cluster headache
- (339.03) Episodic paroxysmal hemicrania
- (339.04) Chronic paroxysmal hemicrania
- (339.05) Short-lasting unilateral neuralgiform headache with conjunctival injection and tearing
- (339.09) Other trigeminal autonomic cephalgias
- (339.1) Tension type headache
- (339.2) Post-traumatic headache
- (339.3) Drug induced headache, not elsewhere classified
- (339.4) Complicated headache syndromes
- (339.8) Other specified headache syndromes
- (339.0) Cluster headaches and other trigeminal autonomic cephalgias
Other disorders of the central nervous system (340–349)
- (340) Multiple sclerosis
- (341) Other demyelinating diseases of central nervous system
- (342) Hemiplegia
- (343) Infantile cerebral palsy
- (344) Other paralytic syndromes
- (344.0) Quadraplegia and quadraparesis
- (344.1) Paraplegia
- (344.2) Diplegia of upper limbs
- (344.3) Monoplegia of lower limb
- (344.4) Monoplegia of upper limb
- (344.5) Unspecified monoplegia
- (344.6) Cauda equina syndrome
- (344.8) Other specified paralytic syndromes
- (344.9) Paralysis unspecified
- (345) Epilepsy
- (346) Migraine
- (347) Cataplexy and narcolepsy
- (348) Other conditions of brain
- (349) Other and unspecified disorders of the nervous system
Disorders of the peripheral nervous system (350–359)
- (350) Trigeminal nerve disorders
- (351) Facial nerve disorders
- (352) Disorders of other cranial nerves
- (353) Nerve root and plexus disorders
- (354) Mononeuritis of upper limb and mononeuritis multiplex
- (355) Mononeuritis of lower limb
- (355.0) Lesion of sciatic nerve
- (355.1) Meralgia paresthetica
- (355.2) Other lesion of femoral nerve
- (355.3) Lesion of lateral popliteal nerve
- (355.4) Lesion of medial popliteal nerve
- (355.5) Tarsal tunnel syndrome
- (355.6) Lesion of plantar nerve
- (355.7) Other mononeuritis of lower limb
- (355.8) Mononeuritis of lower limb unspecified
- (355.9) Mononeuritis of unspecified site
- (356) Hereditary and idiopathic peripheral neuropathy
- (357) Inflammatory and toxic neuropathy
- (358) Myoneural disorders
- (359) Muscular dystrophies and other myopathies
- (359.0) Congenital hereditary myopathies, including:
- (359.1) Muscular dyst., hereditary