G40-G47|Chapter 6: Diseases of the nervous system

Episodic and paroxysmal disorders

307 codes in this section

Codes

G40Category

Epilepsy and recurrent seizures

11 subcategoryies

G40.0Category

Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset

2 subcategoryies

G40.00Category

Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, not intractable

2 subcategoryies

G40.001Billable

Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, not intractable, with status epilepticus

G40.009Billable

Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, not intractable, without status epilepticus

G40.01Category

Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, intractable

2 subcategoryies

G40.011Billable

Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, intractable, with status epilepticus

G40.019Billable

Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, intractable, without status epilepticus

G40.1Category

Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures

2 subcategoryies

G40.10Category

Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, not intractable

2 subcategoryies

G40.101Billable

Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, not intractable, with status epilepticus

G40.109Billable

Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, not intractable, without status epilepticus

G40.11Category

Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable

2 subcategoryies

G40.111Billable

Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable, with status epilepticus

G40.119Billable

Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable, without status epilepticus

G40.2Category

Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures

2 subcategoryies

G40.20Category

Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractable

2 subcategoryies

G40.201Billable

Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractable, with status epilepticus

G40.209Billable

Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractable, without status epilepticus

G40.21Category

Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractable

2 subcategoryies

G40.211Billable

Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractable, with status epilepticus

G40.219Billable

Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractable, without status epilepticus

G40.3Category

Generalized idiopathic epilepsy and epileptic syndromes

2 subcategoryies

G40.30Category

Generalized idiopathic epilepsy and epileptic syndromes, not intractable

2 subcategoryies

G40.301Billable

Generalized idiopathic epilepsy and epileptic syndromes, not intractable, with status epilepticus

G40.309Billable

Generalized idiopathic epilepsy and epileptic syndromes, not intractable, without status epilepticus

G40.31Category

Generalized idiopathic epilepsy and epileptic syndromes, intractable

2 subcategoryies

G40.311Billable

Generalized idiopathic epilepsy and epileptic syndromes, intractable, with status epilepticus

G40.319Billable

Generalized idiopathic epilepsy and epileptic syndromes, intractable, without status epilepticus

G40.ACategory

Absence epileptic syndrome

2 subcategoryies

G40.A0Category

Absence epileptic syndrome, not intractable

2 subcategoryies

G40.A01Billable

Absence epileptic syndrome, not intractable, with status epilepticus

G40.A09Billable

Absence epileptic syndrome, not intractable, without status epilepticus

G40.A1Category

Absence epileptic syndrome, intractable

2 subcategoryies

G40.A11Billable

Absence epileptic syndrome, intractable, with status epilepticus

G40.A19Billable

Absence epileptic syndrome, intractable, without status epilepticus

G40.BCategory

Juvenile myoclonic epilepsy [impulsive petit mal]

2 subcategoryies

G40.B0Category

Juvenile myoclonic epilepsy, not intractable

2 subcategoryies

G40.B01Billable

Juvenile myoclonic epilepsy, not intractable, with status epilepticus

G40.B09Billable

Juvenile myoclonic epilepsy, not intractable, without status epilepticus

G40.B1Category

Juvenile myoclonic epilepsy, intractable

2 subcategoryies

G40.B11Billable

Juvenile myoclonic epilepsy, intractable, with status epilepticus

G40.B19Billable

Juvenile myoclonic epilepsy, intractable, without status epilepticus

G40.CCategory

Lafora progressive myoclonus epilepsy

2 subcategoryies

G40.C0Category

Lafora progressive myoclonus epilepsy, not intractable

2 subcategoryies

G40.C01Billable

Lafora progressive myoclonus epilepsy, not intractable, with status epilepticus

G40.C09Billable

Lafora progressive myoclonus epilepsy, not intractable, without status epilepticus

G40.C1Category

Lafora progressive myoclonus epilepsy, intractable

2 subcategoryies

G40.C11Billable

Lafora progressive myoclonus epilepsy, intractable, with status epilepticus

G40.C19Billable

Lafora progressive myoclonus epilepsy, intractable, without status epilepticus

G40.4Category

Other generalized epilepsy and epileptic syndromes

3 subcategoryies

G40.40Category

Other generalized epilepsy and epileptic syndromes, not intractable

2 subcategoryies

G40.401Billable

Other generalized epilepsy and epileptic syndromes, not intractable, with status epilepticus

G40.409Billable

Other generalized epilepsy and epileptic syndromes, not intractable, without status epilepticus

G40.41Category

Other generalized epilepsy and epileptic syndromes, intractable

2 subcategoryies

G40.411Billable

Other generalized epilepsy and epileptic syndromes, intractable, with status epilepticus

G40.419Billable

Other generalized epilepsy and epileptic syndromes, intractable, without status epilepticus

G40.42Billable

Cyclin-Dependent Kinase-Like 5 Deficiency Disorder

G40.5Category

Epileptic seizures related to external causes

1 subcategoryy

G40.50Category

Epileptic seizures related to external causes, not intractable

2 subcategoryies

G40.501Billable

Epileptic seizures related to external causes, not intractable, with status epilepticus

G40.509Billable

Epileptic seizures related to external causes, not intractable, without status epilepticus

G40.8Category

Other epilepsy and recurrent seizures

6 subcategoryies

G40.80Category

Other epilepsy

4 subcategoryies

G40.801Billable

Other epilepsy, not intractable, with status epilepticus

G40.802Billable

Other epilepsy, not intractable, without status epilepticus

G40.803Billable

Other epilepsy, intractable, with status epilepticus

G40.804Billable

Other epilepsy, intractable, without status epilepticus

G40.81Category

Lennox-Gastaut syndrome

4 subcategoryies

G40.811Billable

Lennox-Gastaut syndrome, not intractable, with status epilepticus

G40.812Billable

Lennox-Gastaut syndrome, not intractable, without status epilepticus

G40.813Billable

Lennox-Gastaut syndrome, intractable, with status epilepticus

G40.814Billable

Lennox-Gastaut syndrome, intractable, without status epilepticus

G40.82Category

Epileptic spasms

4 subcategoryies

G40.821Billable

Epileptic spasms, not intractable, with status epilepticus

G40.822Billable

Epileptic spasms, not intractable, without status epilepticus

G40.823Billable

Epileptic spasms, intractable, with status epilepticus

G40.824Billable

Epileptic spasms, intractable, without status epilepticus

G40.83Category

Dravet syndrome

2 subcategoryies

G40.833Billable

Dravet syndrome, intractable, with status epilepticus

G40.834Billable

Dravet syndrome, intractable, without status epilepticus

G40.84Category

KCNQ2-related epilepsy

4 subcategoryies

G40.841Billable

KCNQ2-related epilepsy, not intractable, with status epilepticus

G40.842Billable

KCNQ2-related epilepsy, not intractable, without status epilepticus

G40.843Billable

KCNQ2-related epilepsy, intractable, with status epilepticus

G40.844Billable

KCNQ2-related epilepsy, intractable, without status epilepticus

G40.89Billable

Other seizures

G40.9Category

Epilepsy, unspecified

2 subcategoryies

G40.90Category

Epilepsy, unspecified, not intractable

2 subcategoryies

G40.901Billable

Epilepsy, unspecified, not intractable, with status epilepticus

G40.909Billable

Epilepsy, unspecified, not intractable, without status epilepticus

G40.91Category

Epilepsy, unspecified, intractable

2 subcategoryies

G40.911Billable

Epilepsy, unspecified, intractable, with status epilepticus

G40.919Billable

Epilepsy, unspecified, intractable, without status epilepticus

G43Category

Migraine

13 subcategoryies

G43.0Category

Migraine without aura

2 subcategoryies

G43.00Category

Migraine without aura, not intractable

2 subcategoryies

G43.001Billable

Migraine without aura, not intractable, with status migrainosus

G43.009Billable

Migraine without aura, not intractable, without status migrainosus

G43.01Category

Migraine without aura, intractable

2 subcategoryies

G43.011Billable

Migraine without aura, intractable, with status migrainosus

G43.019Billable

Migraine without aura, intractable, without status migrainosus

G43.1Category

Migraine with aura

2 subcategoryies

G43.10Category

Migraine with aura, not intractable

2 subcategoryies

G43.101Billable

Migraine with aura, not intractable, with status migrainosus

G43.109Billable

Migraine with aura, not intractable, without status migrainosus

G43.11Category

Migraine with aura, intractable

2 subcategoryies

G43.111Billable

Migraine with aura, intractable, with status migrainosus

G43.119Billable

Migraine with aura, intractable, without status migrainosus

G43.4Category

Hemiplegic migraine

2 subcategoryies

G43.40Category

Hemiplegic migraine, not intractable

2 subcategoryies

G43.401Billable

Hemiplegic migraine, not intractable, with status migrainosus

G43.409Billable

Hemiplegic migraine, not intractable, without status migrainosus

G43.41Category

Hemiplegic migraine, intractable

2 subcategoryies

G43.411Billable

Hemiplegic migraine, intractable, with status migrainosus

G43.419Billable

Hemiplegic migraine, intractable, without status migrainosus

G43.5Category

Persistent migraine aura without cerebral infarction

2 subcategoryies

G43.50Category

Persistent migraine aura without cerebral infarction, not intractable

2 subcategoryies

G43.501Billable

Persistent migraine aura without cerebral infarction, not intractable, with status migrainosus

G43.509Billable

Persistent migraine aura without cerebral infarction, not intractable, without status migrainosus

G43.51Category

Persistent migraine aura without cerebral infarction, intractable

2 subcategoryies

G43.511Billable

Persistent migraine aura without cerebral infarction, intractable, with status migrainosus

G43.519Billable

Persistent migraine aura without cerebral infarction, intractable, without status migrainosus

G43.6Category

Persistent migraine aura with cerebral infarction

2 subcategoryies

G43.60Category

Persistent migraine aura with cerebral infarction, not intractable

2 subcategoryies

G43.601Billable

Persistent migraine aura with cerebral infarction, not intractable, with status migrainosus

G43.609Billable

Persistent migraine aura with cerebral infarction, not intractable, without status migrainosus

G43.61Category

Persistent migraine aura with cerebral infarction, intractable

2 subcategoryies

G43.611Billable

Persistent migraine aura with cerebral infarction, intractable, with status migrainosus

G43.619Billable

Persistent migraine aura with cerebral infarction, intractable, without status migrainosus

G43.7Category

Chronic migraine without aura

2 subcategoryies

G43.70Category

Chronic migraine without aura, not intractable

2 subcategoryies

G43.701Billable

Chronic migraine without aura, not intractable, with status migrainosus

G43.709Billable

Chronic migraine without aura, not intractable, without status migrainosus

G43.71Category

Chronic migraine without aura, intractable

2 subcategoryies

G43.711Billable

Chronic migraine without aura, intractable, with status migrainosus

G43.719Billable

Chronic migraine without aura, intractable, without status migrainosus

G43.ACategory

Cyclical vomiting

2 subcategoryies

G43.A0Billable

Cyclical vomiting, in migraine, not intractable

G43.A1Billable

Cyclical vomiting, in migraine, intractable

G43.BCategory

Ophthalmoplegic migraine

2 subcategoryies

G43.B0Billable

Ophthalmoplegic migraine, not intractable

G43.B1Billable

Ophthalmoplegic migraine, intractable

G43.CCategory

Periodic headache syndromes in child or adult

2 subcategoryies

G43.C0Billable

Periodic headache syndromes in child or adult, not intractable

G43.C1Billable

Periodic headache syndromes in child or adult, intractable

G43.DCategory

Abdominal migraine

2 subcategoryies

G43.D0Billable

Abdominal migraine, not intractable

G43.D1Billable

Abdominal migraine, intractable

G43.8Category

Other migraine

4 subcategoryies

G43.80Category

Other migraine, not intractable

2 subcategoryies

G43.801Billable

Other migraine, not intractable, with status migrainosus

G43.809Billable

Other migraine, not intractable, without status migrainosus

G43.81Category

Other migraine, intractable

2 subcategoryies

G43.811Billable

Other migraine, intractable, with status migrainosus

G43.819Billable

Other migraine, intractable, without status migrainosus

G43.82Category

Menstrual migraine, not intractable

2 subcategoryies

G43.821Billable

Menstrual migraine, not intractable, with status migrainosus

G43.829Billable

Menstrual migraine, not intractable, without status migrainosus

G43.83Category

Menstrual migraine, intractable

2 subcategoryies

G43.831Billable

Menstrual migraine, intractable, with status migrainosus

G43.839Billable

Menstrual migraine, intractable, without status migrainosus

G43.9Category

Migraine, unspecified

2 subcategoryies

G43.90Category

Migraine, unspecified, not intractable

2 subcategoryies

G43.901Billable

Migraine, unspecified, not intractable, with status migrainosus

G43.909Billable

Migraine, unspecified, not intractable, without status migrainosus

G43.91Category

Migraine, unspecified, intractable

2 subcategoryies

G43.911Billable

Migraine, unspecified, intractable, with status migrainosus

G43.919Billable

Migraine, unspecified, intractable, without status migrainosus

G43.ECategory

Chronic migraine with aura

2 subcategoryies

G43.E0Category

Chronic migraine with aura, not intractable

2 subcategoryies

G43.E01Billable

Chronic migraine with aura, not intractable, with status migrainosus

G43.E09Billable

Chronic migraine with aura, not intractable, without status migrainosus

G43.E1Category

Chronic migraine with aura, intractable

2 subcategoryies

G43.E11Billable

Chronic migraine with aura, intractable, with status migrainosus

G43.E19Billable

Chronic migraine with aura, intractable, without status migrainosus

G44Category

Other headache syndromes

7 subcategoryies

G44.0Category

Cluster headaches and other trigeminal autonomic cephalgias (TAC)

7 subcategoryies

G44.00Category

Cluster headache syndrome, unspecified

2 subcategoryies

G44.001Billable

Cluster headache syndrome, unspecified, intractable

G44.009Billable

Cluster headache syndrome, unspecified, not intractable

G44.01Category

Episodic cluster headache

2 subcategoryies

G44.011Billable

Episodic cluster headache, intractable

G44.019Billable

Episodic cluster headache, not intractable

G44.02Category

Chronic cluster headache

2 subcategoryies

G44.021Billable

Chronic cluster headache, intractable

G44.029Billable

Chronic cluster headache, not intractable

G44.03Category

Episodic paroxysmal hemicrania

2 subcategoryies

G44.031Billable

Episodic paroxysmal hemicrania, intractable

G44.039Billable

Episodic paroxysmal hemicrania, not intractable

G44.04Category

Chronic paroxysmal hemicrania

2 subcategoryies

G44.041Billable

Chronic paroxysmal hemicrania, intractable

G44.049Billable

Chronic paroxysmal hemicrania, not intractable

G44.05Category

Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT)

2 subcategoryies

G44.051Billable

Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), intractable

G44.059Billable

Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), not intractable

G44.09Category

Other trigeminal autonomic cephalgias (TAC)

2 subcategoryies

G44.091Billable

Other trigeminal autonomic cephalgias (TAC), intractable

G44.099Billable

Other trigeminal autonomic cephalgias (TAC), not intractable

G44.1Billable

Vascular headache, not elsewhere classified

G44.2Category

Tension-type headache

3 subcategoryies

G44.20Category

Tension-type headache, unspecified

2 subcategoryies

G44.201Billable

Tension-type headache, unspecified, intractable

G44.209Billable

Tension-type headache, unspecified, not intractable

G44.21Category

Episodic tension-type headache

2 subcategoryies

G44.211Billable

Episodic tension-type headache, intractable

G44.219Billable

Episodic tension-type headache, not intractable

G44.22Category

Chronic tension-type headache

2 subcategoryies

G44.221Billable

Chronic tension-type headache, intractable

G44.229Billable

Chronic tension-type headache, not intractable

G44.3Category

Post-traumatic headache

3 subcategoryies

G44.30Category

Post-traumatic headache, unspecified

2 subcategoryies

G44.301Billable

Post-traumatic headache, unspecified, intractable

G44.309Billable

Post-traumatic headache, unspecified, not intractable

G44.31Category

Acute post-traumatic headache

2 subcategoryies

G44.311Billable

Acute post-traumatic headache, intractable

G44.319Billable

Acute post-traumatic headache, not intractable

G44.32Category

Chronic post-traumatic headache

2 subcategoryies

G44.321Billable

Chronic post-traumatic headache, intractable

G44.329Billable

Chronic post-traumatic headache, not intractable

G44.4Category

Drug-induced headache, not elsewhere classified

2 subcategoryies

G44.40Billable

Drug-induced headache, not elsewhere classified, not intractable

G44.41Billable

Drug-induced headache, not elsewhere classified, intractable

G44.5Category

Complicated headache syndromes

4 subcategoryies

G44.51Billable

Hemicrania continua

G44.52Billable

New daily persistent headache (NDPH)

G44.53Billable

Primary thunderclap headache

G44.59Billable

Other complicated headache syndrome

G44.8Category

Other specified headache syndromes

7 subcategoryies

G44.81Billable

Hypnic headache

G44.82Billable

Headache associated with sexual activity

G44.83Billable

Primary cough headache

G44.84Billable

Primary exertional headache

G44.85Billable

Primary stabbing headache

G44.86Billable

Cervicogenic headache

G44.89Billable

Other headache syndrome

G45Category

Transient cerebral ischemic attacks and related syndromes

7 subcategoryies

G45.0Billable

Vertebro-basilar artery syndrome

G45.1Billable

Carotid artery syndrome (hemispheric)

G45.2Billable

Multiple and bilateral precerebral artery syndromes

G45.3Billable

Amaurosis fugax

G45.4Billable

Transient global amnesia

G45.8Billable

Other transient cerebral ischemic attacks and related syndromes

G45.9Billable

Transient cerebral ischemic attack, unspecified

G46Category

Vascular syndromes of brain in cerebrovascular diseases

9 subcategoryies

G46.0Billable

Middle cerebral artery syndrome

G46.1Billable

Anterior cerebral artery syndrome

G46.2Billable

Posterior cerebral artery syndrome

G46.3Billable

Brain stem stroke syndrome

G46.4Billable

Cerebellar stroke syndrome

G46.5Billable

Pure motor lacunar syndrome

G46.6Billable

Pure sensory lacunar syndrome

G46.7Billable

Other lacunar syndromes

G46.8Billable

Other vascular syndromes of brain in cerebrovascular diseases

G47Category

Sleep disorders

9 subcategoryies

G47.0Category

Insomnia

3 subcategoryies

G47.00Billable

Insomnia, unspecified

G47.01Billable

Insomnia due to medical condition

G47.09Billable

Other insomnia

G47.1Category

Hypersomnia

6 subcategoryies

G47.10Billable

Hypersomnia, unspecified

G47.11Billable

Idiopathic hypersomnia with long sleep time

G47.12Billable

Idiopathic hypersomnia without long sleep time

G47.13Billable

Recurrent hypersomnia

G47.14Billable

Hypersomnia due to medical condition

G47.19Billable

Other hypersomnia

G47.2Category

Circadian rhythm sleep disorders

9 subcategoryies

G47.20Billable

Circadian rhythm sleep disorder, unspecified type

G47.21Billable

Circadian rhythm sleep disorder, delayed sleep phase type

G47.22Billable

Circadian rhythm sleep disorder, advanced sleep phase type

G47.23Billable

Circadian rhythm sleep disorder, irregular sleep wake type

G47.24Billable

Circadian rhythm sleep disorder, free running type

G47.25Billable

Circadian rhythm sleep disorder, jet lag type

G47.26Billable

Circadian rhythm sleep disorder, shift work type

G47.27Billable

Circadian rhythm sleep disorder in conditions classified elsewhere

G47.29Billable

Other circadian rhythm sleep disorder

G47.3Category

Sleep apnea

9 subcategoryies

G47.30Billable

Sleep apnea, unspecified

G47.31Billable

Primary central sleep apnea

G47.32Billable

High altitude periodic breathing

G47.33Billable

Obstructive sleep apnea (adult) (pediatric)

G47.34Billable

Idiopathic sleep related nonobstructive alveolar hypoventilation

G47.35Billable

Congenital central alveolar hypoventilation syndrome

G47.36Billable

Sleep related hypoventilation in conditions classified elsewhere

G47.37Billable

Central sleep apnea in conditions classified elsewhere

G47.39Billable

Other sleep apnea

G47.4Category

Narcolepsy and cataplexy

2 subcategoryies

G47.41Category

Narcolepsy

2 subcategoryies

G47.411Billable

Narcolepsy with cataplexy

G47.419Billable

Narcolepsy without cataplexy

G47.42Category

Narcolepsy in conditions classified elsewhere

2 subcategoryies

G47.421Billable

Narcolepsy in conditions classified elsewhere with cataplexy

G47.429Billable

Narcolepsy in conditions classified elsewhere without cataplexy

G47.5Category

Parasomnia

6 subcategoryies

G47.50Billable

Parasomnia, unspecified

G47.51Billable

Confusional arousals

G47.52Billable

REM sleep behavior disorder

G47.53Billable

Recurrent isolated sleep paralysis

G47.54Billable

Parasomnia in conditions classified elsewhere

G47.59Billable

Other parasomnia

G47.6Category

Sleep related movement disorders

4 subcategoryies

G47.61Billable

Periodic limb movement disorder

G47.62Billable

Sleep related leg cramps

G47.63Billable

Sleep related bruxism

G47.69Billable

Other sleep related movement disorders

G47.8Billable

Other sleep disorders

G47.9Billable

Sleep disorder, unspecified

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