List of ICD-9 codes 320–359: diseases of the nervous system

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Contents

1 6a. Diseases of the nervous system (320–359)
2 See also

6a. Diseases of the nervous system (320–359) [edit]

Inflammatory diseases of the central nervous system (320–327) [edit]

(320) Bacterial meningitis
- (320.0) Meningitis, hemophilus
- (320.9) Meningitis, bacterial, NOS
(321) Meningitis due to other organisms
- (321.0) Cryptococcal meningitis
(322) Meningitis of unspecified cause
(323) Encephalitis, myelitis, and encephalomyelitis
- (323.6) Postinfectious encephalitis
- (323.9) Encephalitis, unspec.
(324) Intracranial and intraspinal abscess
(325) Phlebitis and thrombophlebitis of intracranial venous sinuses
- (325.0) Venous sinus thrombosis, intracranial
(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
  - (327.51) Periodic limb movement disorder
- (327.8) Other organic sleep disorders

Hereditary and degenerative diseases of the central nervous system (330–337) [edit]

(330) Cerebral degenerations usually manifest in childhood
- (330.0) Leukodystrophy
  - Krabbe disease
  - Pelizaeus-Merzbacher disease
- (330.1) Cerebral lipidoses
  - Tay-Sachs disease
(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
  - Olivopontocerebellar atrophy
  - Shy-Drager syndrome
- (333.1) Essential tremor/familial tremor
- (333.2) Myoclonus
  - Lafora's disease
  - Unverricht disease
- (333.4) Huntington's chorea
- (333.8) Fragments of torsion dystonia
  - (333.81) Blepharospasm
- (333.9) Other and unspecified extrapyramidal diseases and abnormal movement disorders
  - (333.99) Other extrapyramidal diseases and abnormal movement disorders
    - Restless legs
    - Serotonin syndrome
(334) Spinocerebellar disease
- (334.0) Friedreich's ataxia
  - Spinocerebellar 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
(336) Other diseases of spinal cord
- (336.0) Syringomyelia and syringobulbia
(337) Disorders of the autonomic nervous system
- (337.0) Idiopathic peripheral autonomic neuropathy
  - (337.00) Idiopathic peripheral autonomic neuropathy, unspecified
  - (337.01) Carotid sinus syndrome
  - (337.09) Other 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) [edit]

(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) [edit]

(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
  - (339.10) Tension type headache, unspecified
  - (339.11) Episodic tension type headache
  - (339.12) Chronic tension type headache
- (339.2) Post-traumatic headache
  - (339.20) Post-traumatic headache, unspecified
  - (339.21) Acute post-traumatic headache
  - (339.22) Chronic post-traumatic headache
- (339.3) Drug induced headache, not elsewhere classified
- (339.4) Complicated headache syndromes
  - (339.41) Hemicrania continua
  - (339.42) New daily persistent headache
  - (339.43) Primary thunderclap headache
  - (339.44) Other complicated headache syndrome
- (339.8) Other specified headache syndromes
  - (339.81) Hypnic headache
  - (339.82) Headache associated with sexual activity
  - (339.83) Primary cough headache
  - (339.84) Primary exertional headache
  - (339.85) Primary stabbing headache
  - (339.89) Other headache syndromes

Other disorders of the central nervous system (340–349) [edit]

(340) Multiple sclerosis
(341) Other demyelinating diseases of central nervous system
- (341.0) Neuromyelitis optica
- (341.1) Schilder's disease
- (341.2) Acute myelitis (transverse myelitis)
(342) Hemiplegia
- (342.0) Hemiplegia, flaccid
- (342.1) Hemiplegia, spastic
(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
  - (344.81) Locked-in state
- (344.9) Paralysis unspecified
(345) Epilepsy
(346) Migraine
(347) Cataplexy and narcolepsy
- (347.0) Narcolepsy, w/o cataplexy
(348) Other conditions of brain
- (348.0) Cerebral cysts
- (348.1) Anoxic brain damage
- (348.2) Pseudotumor cerebri
- (348.3) Encephalopathy, unspec.
  - (348.31) Encephalopathy, metabolic
- (348.4) Compression of brain
- (348.5) Cerebral edema
(349) Other and unspecified disorders of the nervous system
- (349.0) Headache, post spinal puncture
  - Post dural puncture headache
- (349.8) Other specified disorders of nervous system
  - (349.81) Cerebrospinal fluid rhinorrhea
  - (349.82) Toxic encephalopathy

Disorders of the peripheral nervous system (350–359) [edit]

(350) Trigeminal nerve disorders
- (350.1) Trigeminal neuralgia
(351) Facial nerve disorders
- (351.0) Bell's palsy
(352) Disorders of other cranial nerves
(353) Nerve root and plexus disorders
- (353.0) Thoracic outlet syndrome
- (353.6) Phantom limb
(354) Mononeuritis of upper limb and mononeuritis multiplex
- (354.0) Carpal tunnel syndrome
- (354.1) Other lesion of median nerve
- (354.2) Lesion of ulnar nerve
- (354.3) Lesion of radial nerve
- (354.4) Causalgia of upper limb
- (354.5) Mononeuritis multiplex
- (354.8) Other mononeuritis of upper limb
- (354.9) Mononeuritis of upper limb unspecified
(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
  - Morton's neuroma
- (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

See also [edit]

Pathology: Medical conditions and ICD code

(Disease / Disorder / Syndrome / Sequence, Symptom / Sign, Injury, etc.)

(A/B, 001–139)

Infectious disease/Infection: Bacterial disease (G+, G-) · Virus disease · Parasitic disease (Protozoan infection, Helminthiasis, Ectoparasitic infestation) · Mycosis · Zoonosis

(C/D,
140–239 &
279–289)

Cancer (C00–D48, 140–239)	Tumor

Myeloid hematologic (D50–D77, 280–289)	Anemia · Coagulopathy

Lymphoid immune (D80–D89, 279)	Immunodeficiency · Immunoproliferative disorder · Hypersensitivity

Endocrine disease · Nutrition disorder · Inborn error of metabolism

Mental disorder

(G, 320–359)

Nervous system disease (CNS, PNS) · Neuromuscular disease

Eye disease · Ear disease

Cardiovascular disease (Heart disease, Vascular disease)

Respiratory disease (Obstructive lung disease, Restrictive lung disease, Pneumonia)

Stomatognathic disease (Tooth disease) · Digestive disease (Esophageal, Stomach, Enteropathy, Liver, Pancreatic)

Skin disease · skin appendages (Nail disease, Hair disease, Sweat gland disease)

Musculoskeletal disorders: Myopathy · Arthropathy · Osteochondropathy (Osteopathy, Chondropathy)

Urologic disease (Nephropathy, Urinary bladder disease) · Male genital disease · Breast disease · Female genital disease

Complications of pregnancy · Obstetric labor complication · Puerperal disorder

Congenital disorder (Congenital abnormality)

Syndromes · Medical signs (Eponymous)

(S/T, 800–999)

Bone fracture · Joint dislocation · Sprain · Strain · Subluxation · Head injury · Chest trauma · Poisoning

Diseases of meninges (G00–G03, 320–322)

Meningoencephalitis

anat (n/s/m/p/4/e/b/d/c/a/f/l/g)/phys/devp

noco (m/d/e/h/v/s)/cong/tumr, sysi/epon, injr

proc, drug (N1A/2AB/C/3/4/7A/B/C/D)

Pathology of the nervous system, primarily CNS (G04–G47, 323–349)

Brain	Encephalitis Viral encephalitis Herpesviral encephalitis Cavernous sinus thrombosis Brain abscess Amoebic

Spinal cord	Myelitis: Poliomyelitis Demyelinating disease Transverse myelitis Tropical spastic paraparesis Epidural abscess

Both/either	Encephalomyelitis Acute disseminated Meningoencephalitis

Brain/
encephalopathy

Extrapyramidal and movement disorders	Basal ganglia disease Parkinsonism PD Postencephalitic NMS PKAN Tauopathy PSP Striatonigral degeneration Hemiballismus HD OA Dyskinesia Dystonia Status dystonicus Spasmodic torticollis Meige's Blepharospasm Athetosis Chorea Choreoathetosis Myoclonus Myoclonic epilepsy Akathesia Tremor Essential tremor Intention tremor Restless legs Stiff person

Dementia	Tauopathy Alzheimer's Early-onset Primary progressive aphasia Frontotemporal dementia/Frontotemporal lobar degeneration Pick's Dementia with Lewy bodies Multi-infarct dementia

Mitochondrial disease	Leigh's disease

Episodic/
paroxysmal

Seizure/epilepsy	Focal Generalised Status epilepticus Myoclonic epilepsy

Headache	Migraine Familial hemiplegic Cluster Tension

Cerebrovascular	TIA Amaurosis fugax Transient global amnesia Acute aphasia Stroke MCA ACA PCA Foville's Millard-Gubler Lateral medullary Weber's Lacunar stroke

Sleep disorders	Insomnia Hypersomnia Sleep apnea Obstructive Ondine's curse Narcolepsy Cataplexy Kleine-Levin Circadian rhythm sleep disorder Advanced sleep phase disorder Delayed sleep phase disorder Non-24-hour sleep-wake disorder Jet lag

Other

Spinal cord/
myelopathy

Both/either

SA	Friedreich's ataxia Ataxia telangiectasia

MND	UMN only: PLS PP HSP LMN only: Distal hereditary motor neuropathies Spinal muscular atrophies SMA SMAX1 SMAX2 DSMA1 SMA-PCH SMA-LED PMA PBP Fazio–Londe Infantile progressive bulbar palsy both: ALS

anat (n/s/m/p/4/e/b/d/c/a/f/l/g)/phys/devp

noco (m/d/e/h/v/s)/cong/tumr, sysi/epon, injr

proc, drug (N1A/2AB/C/3/4/7A/B/C/D)

Psychophysiology: Sleep and sleep disorders (F51 and G47 / 307.4 and 327)

Sleep stages

Sleep disorders

Dyssomnia	Insomnia Narcolepsy Sleep apnea Obesity hypoventilation syndrome Ondine's curse Hypersomnia Kleine–Levin syndrome Sleep state misperception

Circadian rhythm disorder	Advanced sleep phase disorder Delayed sleep phase disorder Irregular sleep–wake rhythm Jet lag Non-24-hour sleep-wake disorder Shift work sleep disorder

Parasomnia	Catathrenia Night terror Rapid eye movement behavior disorder Sleepwalking Somniloquy

Other	Night eating syndrome Nocturia Nocturnal myoclonus

Benign phenomena

Related topics

¹ Not a sleep disorder.

dsrd (o, p, m, p, a, d, s), sysi/epon, spvo

proc (eval/thrp), drug (N5A/5B/5C/6A/6B/6D)

anat (n/s/m/p/4/e/b/d/c/a/f/l/g)/phys/devp

noco (m/d/e/h/v/s)/cong/tumr, sysi/epon, injr

proc, drug (N1A/2AB/C/3/4/7A/B/C/D)

Autonomic diseases, Dysautonomia, autonomic- neuropathy (G90, 337)

Orthostatic intolerance

Other

anat (h/r/t/c/b/l/s/a)/phys (r)/devp/prot/nttr/nttm/ntrp

noco/auto/cong/tumr, sysi/epon, injr

proc, drug (N1B)

CNS disease: Headache (G43–G44, 339, 346)

ICHD 1	Migraine Familial hemiplegic Retinal migraine

ICHD 2	Tension

ICHD 3	Cluster Chronic paroxysmal hemicrania SUNCT

ICHD 4	Hemicrania continua Thunderclap headache Coital cephalalgia New daily persistent headache Hypnic headache

ICHD 5	Migralepsy

ICHD 7	Ictal headache Post-dural-puncture headache

ICHD 8	Hangover Medication overuse headache

Other

Vascular

anat (n/s/m/p/4/e/b/d/c/a/f/l/g)/phys/devp

noco (m/d/e/h/v/s)/cong/tumr, sysi/epon, injr

proc, drug (N1A/2AB/C/3/4/7A/B/C/D)

Multiple sclerosis and other demyelinating diseases of CNS (G35–G37, 340–341)

Signs and symptoms

Diagnosis and evolution following

Investigation

Borderline forms

Acute disseminated encephalomyelitis
Balo concentric sclerosis
Neuromyelitis optica
Marburg multiple sclerosis
Schilder's disease
Tumefactive multiple sclerosis (Autoimmune PNS diseases like Guillain-Barré syndrome and CIDP are normally set appart)

Other

anat (n/s/m/p/4/e/b/d/c/a/f/l/g)/phys/devp

noco (m/d/e/h/v/s)/cong/tumr, sysi/epon, injr

proc, drug (N1A/2AB/C/3/4/7A/B/C/D)

Cerebral palsy and other syndromes (G80–G83, 342–344)

Paresis and plegia NOS

Flaccidity vs. spasticity

Specific types

anat (n/s/m/p/4/e/b/d/c/a/f/l/g)/phys/devp

noco (m/d/e/h/v/s)/cong/tumr, sysi/epon, injr

proc, drug (N1A/2AB/C/3/4/7A/B/C/D)

Nervous system pathology, PNS, somatic (G50–G64, 350–357)

Nerve, nerve root, plexus

Cranial nerve
disease

V (Trigeminal neuralgia, Anesthesia dolorosa) · VII (Facial nerve paralysis, Bell's palsy, Melkersson–Rosenthal syndrome, Parry–Romberg syndrome, Central seven) · XI (Accessory nerve disorder)

Radiculopathy,
plexopathy

brachial plexus (Brachial plexus lesion, Thoracic outlet syndrome) · Phantom limb

Mono-
neuropathy

Upper limb	median nerve (Carpal tunnel syndrome, Ape hand deformity) ulnar nerve (Ulnar nerve entrapment, Froment's sign, Guyon's canal syndrome, Ulnar claw) radial nerve (Radial neuropathy, Wrist drop, Cheiralgia paresthetica) long thoracic nerve (Winged scapula)

Lower limb	lateral cutaneous nerve of thigh (Meralgia paraesthetica) tibial nerve (Tarsal tunnel syndrome) plantar nerve (Morton's neuroma) superior gluteal nerve (Trendelenburg's sign) sciatic nerve (Piriformis syndrome)

General	Causalgia · Mononeuritis multiplex · Neuropathy (Neuralgia/Neuritis) · Nerve compression syndrome

Polyneuropathies/Polyradiculoneuropathy

HMSN	Charcot–Marie–Tooth disease · Dejerine–Sottas disease · Refsum's disease · Hereditary spastic paraplegia

Autoimmune/demyelinating	Guillain–Barré syndrome · Chronic inflammatory demyelinating polyneuropathy

Other	Alcoholic polyneuropathy

anat (h/r/t/c/b/l/s/a)/phys (r)/devp/prot/nttr/nttm/ntrp

noco/auto/cong/tumr, sysi/epon, injr

proc, drug (N1B)

Diseases of myoneural junction and muscle / neuromuscular disease (G70–G73, 358–359)

Neuromuscular-
junction disease

autoimmune
- Myasthenia gravis
- Lambert–Eaton myasthenic syndrome

Myopathy/
congenital myopathy

Muscular dystrophy
(DAPC)

AD	Limb-girdle muscular dystrophy 1 Oculopharyngeal Facioscapulohumeral Myotonic Distal (most)

AR	Limb-girdle muscular dystrophy 2 Congenital Fukuyama Ullrich Walker–Warburg

XR	dystrophin Becker's Duchenne Emery–Dreifuss

Other structural

Myotonia	Myotonia congenita Thomsen disease Neuromyotonia/Isaacs syndrome Paramyotonia congenita

Periodic paralysis	Hypokalemic Thyrotoxic Hyperkalemic

Other	Central core disease

Mitochondrial myopathy

Other

Inflammatory myopathy

M: MUS, DF+DRCT

anat (h/n, u, t/d, a/p, l)/phys/devp/hist

noco (m, s, c)/cong (d)/tumr, sysi/epon, injr

proc, drug (M1A/3)

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