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Chapter 6: Diseases of the nervous system
G40-G47

Episodic and paroxysmal disorders

Explore the ICD-10 code range G40-G47 for Episodic and Paroxysmal Disorders, crucial for accurate clinical documentation and coding specificity. Enhance your medical records with precise classifications of conditions like epilepsy, migraine, and sleep disorders. Ideal for healthcare professionals seeking to optimize patient care and streamline billing processes.

About This Range
307+
Total codes
205+
Billable codes
102+
Non-billable codes
6
Chapters
Codes in this Range (307+)
Chapter 6: Diseases of the nervous system Range: G00-G99
G40
Epilepsy and recurrent seizures
G40.0
Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset
G40.00
Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, not intractable
G40.001
Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, not intractable, with status epilepticus
Billable
G40.009
Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, not intractable, without status epilepticus
Billable
G40.01
Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, intractable
G40.011
Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, intractable, with status epilepticus
Billable
G40.019
Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, intractable, without status epilepticus
Billable
G40.1
Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures
G40.10
Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, not intractable
G40.101
Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, not intractable, with status epilepticus
Billable
G40.109
Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, not intractable, without status epilepticus
Billable
G40.11
Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable
G40.111
Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable, with status epilepticus
Billable
G40.119
Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable, without status epilepticus
Billable
G40.2
Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures
G40.20
Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractable
G40.201
Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractable, with status epilepticus
Billable
G40.209
Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractable, without status epilepticus
Billable
G40.21
Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractable
G40.211
Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractable, with status epilepticus
Billable
G40.219
Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractable, without status epilepticus
Billable
G40.3
Generalized idiopathic epilepsy and epileptic syndromes
G40.30
Generalized idiopathic epilepsy and epileptic syndromes, not intractable
G40.301
Generalized idiopathic epilepsy and epileptic syndromes, not intractable, with status epilepticus
Billable
G40.309
Generalized idiopathic epilepsy and epileptic syndromes, not intractable, without status epilepticus
Billable
G40.31
Generalized idiopathic epilepsy and epileptic syndromes, intractable
G40.311
Generalized idiopathic epilepsy and epileptic syndromes, intractable, with status epilepticus
Billable
G40.319
Generalized idiopathic epilepsy and epileptic syndromes, intractable, without status epilepticus
Billable
G40.A
Absence epileptic syndrome
G40.A0
Absence epileptic syndrome, not intractable
G40.A01
Absence epileptic syndrome, not intractable, with status epilepticus
Billable
G40.A09
Absence epileptic syndrome, not intractable, without status epilepticus
Billable
G40.A1
Absence epileptic syndrome, intractable
G40.A11
Absence epileptic syndrome, intractable, with status epilepticus
Billable
G40.A19
Absence epileptic syndrome, intractable, without status epilepticus
Billable
G40.B
Juvenile myoclonic epilepsy [impulsive petit mal]
G40.B0
Juvenile myoclonic epilepsy, not intractable
G40.B01
Juvenile myoclonic epilepsy, not intractable, with status epilepticus
Billable
G40.B09
Juvenile myoclonic epilepsy, not intractable, without status epilepticus
Billable
G40.B1
Juvenile myoclonic epilepsy, intractable
G40.B11
Juvenile myoclonic epilepsy, intractable, with status epilepticus
Billable
G40.B19
Juvenile myoclonic epilepsy, intractable, without status epilepticus
Billable
G40.C
Lafora progressive myoclonus epilepsy
G40.C0
Lafora progressive myoclonus epilepsy, not intractable
G40.C01
Lafora progressive myoclonus epilepsy, not intractable, with status epilepticus
Billable
G40.C09
Lafora progressive myoclonus epilepsy, not intractable, without status epilepticus
Billable
G40.C1
Lafora progressive myoclonus epilepsy, intractable
G40.C11
Lafora progressive myoclonus epilepsy, intractable, with status epilepticus
Billable
G40.C19
Lafora progressive myoclonus epilepsy, intractable, without status epilepticus
Billable
G40.4
Other generalized epilepsy and epileptic syndromes
G40.40
Other generalized epilepsy and epileptic syndromes, not intractable
G40.401
Other generalized epilepsy and epileptic syndromes, not intractable, with status epilepticus
Billable
G40.409
Other generalized epilepsy and epileptic syndromes, not intractable, without status epilepticus
Billable
G40.41
Other generalized epilepsy and epileptic syndromes, intractable
G40.411
Other generalized epilepsy and epileptic syndromes, intractable, with status epilepticus
Billable
G40.419
Other generalized epilepsy and epileptic syndromes, intractable, without status epilepticus
Billable
G40.42
Cyclin-Dependent Kinase-Like 5 Deficiency Disorder
Billable
G40.5
Epileptic seizures related to external causes
G40.50
Epileptic seizures related to external causes, not intractable
G40.501
Epileptic seizures related to external causes, not intractable, with status epilepticus
Billable
G40.509
Epileptic seizures related to external causes, not intractable, without status epilepticus
Billable
G40.8
Other epilepsy and recurrent seizures
G40.80
Other epilepsy
G40.801
Other epilepsy, not intractable, with status epilepticus
Billable
G40.802
Other epilepsy, not intractable, without status epilepticus
Billable
G40.803
Other epilepsy, intractable, with status epilepticus
Billable
G40.804
Other epilepsy, intractable, without status epilepticus
Billable
G40.81
Lennox-Gastaut syndrome
G40.811
Lennox-Gastaut syndrome, not intractable, with status epilepticus
Billable
G40.812
Lennox-Gastaut syndrome, not intractable, without status epilepticus
Billable
G40.813
Lennox-Gastaut syndrome, intractable, with status epilepticus
Billable
G40.814
Lennox-Gastaut syndrome, intractable, without status epilepticus
Billable
G40.82
Epileptic spasms
G40.821
Epileptic spasms, not intractable, with status epilepticus
Billable
G40.822
Epileptic spasms, not intractable, without status epilepticus
Billable
G40.823
Epileptic spasms, intractable, with status epilepticus
Billable
G40.824
Epileptic spasms, intractable, without status epilepticus
Billable
G40.83
Dravet syndrome
G40.833
Dravet syndrome, intractable, with status epilepticus
Billable
G40.834
Dravet syndrome, intractable, without status epilepticus
Billable
G40.84
KCNQ2-related epilepsy
G40.841
KCNQ2-related epilepsy, not intractable, with status epilepticus
Billable
G40.842
KCNQ2-related epilepsy, not intractable, without status epilepticus
Billable
G40.843
KCNQ2-related epilepsy, intractable, with status epilepticus
Billable
G40.844
KCNQ2-related epilepsy, intractable, without status epilepticus
Billable
G40.89
Other seizures
Billable
G40.9
Epilepsy, unspecified
G40.90
Epilepsy, unspecified, not intractable
G40.901
Epilepsy, unspecified, not intractable, with status epilepticus
Billable
G40.909
Epilepsy, unspecified, not intractable, without status epilepticus
Billable
G40.91
Epilepsy, unspecified, intractable
G40.911
Epilepsy, unspecified, intractable, with status epilepticus
Billable
G40.919
Epilepsy, unspecified, intractable, without status epilepticus
Billable
G43
Migraine
G43.0
Migraine without aura
G43.00
Migraine without aura, not intractable
G43.001
Migraine without aura, not intractable, with status migrainosus
Billable
G43.009
Migraine without aura, not intractable, without status migrainosus
Billable
G43.01
Migraine without aura, intractable
G43.011
Migraine without aura, intractable, with status migrainosus
Billable
G43.019
Migraine without aura, intractable, without status migrainosus
Billable
G43.1
Migraine with aura
G43.10
Migraine with aura, not intractable
G43.101
Migraine with aura, not intractable, with status migrainosus
Billable
G43.109
Migraine with aura, not intractable, without status migrainosus
Billable
G43.11
Migraine with aura, intractable
G43.111
Migraine with aura, intractable, with status migrainosus
Billable
G43.119
Migraine with aura, intractable, without status migrainosus
Billable
G43.4
Hemiplegic migraine
G43.40
Hemiplegic migraine, not intractable
G43.401
Hemiplegic migraine, not intractable, with status migrainosus
Billable
G43.409
Hemiplegic migraine, not intractable, without status migrainosus
Billable
G43.41
Hemiplegic migraine, intractable
G43.411
Hemiplegic migraine, intractable, with status migrainosus
Billable
G43.419
Hemiplegic migraine, intractable, without status migrainosus
Billable
G43.5
Persistent migraine aura without cerebral infarction
G43.50
Persistent migraine aura without cerebral infarction, not intractable
G43.501
Persistent migraine aura without cerebral infarction, not intractable, with status migrainosus
Billable
G43.509
Persistent migraine aura without cerebral infarction, not intractable, without status migrainosus
Billable
G43.51
Persistent migraine aura without cerebral infarction, intractable
G43.511
Persistent migraine aura without cerebral infarction, intractable, with status migrainosus
Billable
G43.519
Persistent migraine aura without cerebral infarction, intractable, without status migrainosus
Billable
G43.6
Persistent migraine aura with cerebral infarction
G43.60
Persistent migraine aura with cerebral infarction, not intractable
G43.601
Persistent migraine aura with cerebral infarction, not intractable, with status migrainosus
Billable
G43.609
Persistent migraine aura with cerebral infarction, not intractable, without status migrainosus
Billable
G43.61
Persistent migraine aura with cerebral infarction, intractable
G43.611
Persistent migraine aura with cerebral infarction, intractable, with status migrainosus
Billable
G43.619
Persistent migraine aura with cerebral infarction, intractable, without status migrainosus
Billable
G43.7
Chronic migraine without aura
G43.70
Chronic migraine without aura, not intractable
G43.701
Chronic migraine without aura, not intractable, with status migrainosus
Billable
G43.709
Chronic migraine without aura, not intractable, without status migrainosus
Billable
G43.71
Chronic migraine without aura, intractable
G43.711
Chronic migraine without aura, intractable, with status migrainosus
Billable
G43.719
Chronic migraine without aura, intractable, without status migrainosus
Billable
G43.A
Cyclical vomiting
G43.A0
Cyclical vomiting, in migraine, not intractable
Billable
G43.A1
Cyclical vomiting, in migraine, intractable
Billable
G43.B
Ophthalmoplegic migraine
G43.B0
Ophthalmoplegic migraine, not intractable
Billable
G43.B1
Ophthalmoplegic migraine, intractable
Billable
G43.C
Periodic headache syndromes in child or adult
G43.C0
Periodic headache syndromes in child or adult, not intractable
Billable
G43.C1
Periodic headache syndromes in child or adult, intractable
Billable
G43.D
Abdominal migraine
G43.D0
Abdominal migraine, not intractable
Billable
G43.D1
Abdominal migraine, intractable
Billable
G43.8
Other migraine
G43.80
Other migraine, not intractable
G43.801
Other migraine, not intractable, with status migrainosus
Billable
G43.809
Other migraine, not intractable, without status migrainosus
Billable
G43.81
Other migraine, intractable
G43.811
Other migraine, intractable, with status migrainosus
Billable
G43.819
Other migraine, intractable, without status migrainosus
Billable
G43.82
Menstrual migraine, not intractable
G43.821
Menstrual migraine, not intractable, with status migrainosus
Billable
G43.829
Menstrual migraine, not intractable, without status migrainosus
Billable
G43.83
Menstrual migraine, intractable
G43.831
Menstrual migraine, intractable, with status migrainosus
Billable
G43.839
Menstrual migraine, intractable, without status migrainosus
Billable
G43.9
Migraine, unspecified
G43.90
Migraine, unspecified, not intractable
G43.901
Migraine, unspecified, not intractable, with status migrainosus
Billable
G43.909
Migraine, unspecified, not intractable, without status migrainosus
Billable
G43.91
Migraine, unspecified, intractable
G43.911
Migraine, unspecified, intractable, with status migrainosus
Billable
G43.919
Migraine, unspecified, intractable, without status migrainosus
Billable
G43.E
Chronic migraine with aura
G43.E0
Chronic migraine with aura, not intractable
G43.E01
Chronic migraine with aura, not intractable, with status migrainosus
Billable
G43.E09
Chronic migraine with aura, not intractable, without status migrainosus
Billable
G43.E1
Chronic migraine with aura, intractable
G43.E11
Chronic migraine with aura, intractable, with status migrainosus
Billable
G43.E19
Chronic migraine with aura, intractable, without status migrainosus
Billable
G44
Other headache syndromes
G44.0
Cluster headaches and other trigeminal autonomic cephalgias (TAC)
G44.00
Cluster headache syndrome, unspecified
G44.001
Cluster headache syndrome, unspecified, intractable
Billable
G44.009
Cluster headache syndrome, unspecified, not intractable
Billable
G44.01
Episodic cluster headache
G44.011
Episodic cluster headache, intractable
Billable
G44.019
Episodic cluster headache, not intractable
Billable
G44.02
Chronic cluster headache
G44.021
Chronic cluster headache, intractable
Billable
G44.029
Chronic cluster headache, not intractable
Billable
G44.03
Episodic paroxysmal hemicrania
G44.031
Episodic paroxysmal hemicrania, intractable
Billable
G44.039
Episodic paroxysmal hemicrania, not intractable
Billable
G44.04
Chronic paroxysmal hemicrania
G44.041
Chronic paroxysmal hemicrania, intractable
Billable
G44.049
Chronic paroxysmal hemicrania, not intractable
Billable
G44.05
Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT)
G44.051
Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), intractable
Billable
G44.059
Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), not intractable
Billable
G44.09
Other trigeminal autonomic cephalgias (TAC)
G44.091
Other trigeminal autonomic cephalgias (TAC), intractable
Billable
G44.099
Other trigeminal autonomic cephalgias (TAC), not intractable
Billable
G44.1
Vascular headache, not elsewhere classified
Billable
G44.2
Tension-type headache
G44.20
Tension-type headache, unspecified
G44.201
Tension-type headache, unspecified, intractable
Billable
G44.209
Tension-type headache, unspecified, not intractable
Billable
G44.21
Episodic tension-type headache
G44.211
Episodic tension-type headache, intractable
Billable
G44.219
Episodic tension-type headache, not intractable
Billable
G44.22
Chronic tension-type headache
G44.221
Chronic tension-type headache, intractable
Billable
G44.229
Chronic tension-type headache, not intractable
Billable
G44.3
Post-traumatic headache
G44.30
Post-traumatic headache, unspecified
G44.301
Post-traumatic headache, unspecified, intractable
Billable
G44.309
Post-traumatic headache, unspecified, not intractable
Billable
G44.31
Acute post-traumatic headache
G44.311
Acute post-traumatic headache, intractable
Billable
G44.319
Acute post-traumatic headache, not intractable
Billable
G44.32
Chronic post-traumatic headache
G44.321
Chronic post-traumatic headache, intractable
Billable
G44.329
Chronic post-traumatic headache, not intractable
Billable
G44.4
Drug-induced headache, not elsewhere classified
G44.40
Drug-induced headache, not elsewhere classified, not intractable
Billable
G44.41
Drug-induced headache, not elsewhere classified, intractable
Billable
G44.5
Complicated headache syndromes
G44.51
Hemicrania continua
Billable
G44.52
New daily persistent headache (NDPH)
Billable
G44.53
Primary thunderclap headache
Billable
G44.59
Other complicated headache syndrome
Billable
G44.8
Other specified headache syndromes
G44.81
Hypnic headache
Billable
G44.82
Headache associated with sexual activity
Billable
G44.83
Primary cough headache
Billable
G44.84
Primary exertional headache
Billable
G44.85
Primary stabbing headache
Billable
G44.86
Cervicogenic headache
Billable
G44.89
Other headache syndrome
Billable
G45
Transient cerebral ischemic attacks and related syndromes
G45.0
Vertebro-basilar artery syndrome
Billable
G45.1
Carotid artery syndrome (hemispheric)
Billable
G45.2
Multiple and bilateral precerebral artery syndromes
Billable
G45.3
Amaurosis fugax
Billable
G45.4
Transient global amnesia
Billable
G45.8
Other transient cerebral ischemic attacks and related syndromes
Billable
G45.9
Transient cerebral ischemic attack, unspecified
Billable
G46
Vascular syndromes of brain in cerebrovascular diseases
G46.0
Middle cerebral artery syndrome
Billable
G46.1
Anterior cerebral artery syndrome
Billable
G46.2
Posterior cerebral artery syndrome
Billable
G46.3
Brain stem stroke syndrome
Billable
G46.4
Cerebellar stroke syndrome
Billable
G46.5
Pure motor lacunar syndrome
Billable
G46.6
Pure sensory lacunar syndrome
Billable
G46.7
Other lacunar syndromes
Billable
G46.8
Other vascular syndromes of brain in cerebrovascular diseases
Billable
G47
Sleep disorders
G47.0
Insomnia
G47.00
Insomnia, unspecified
Billable
G47.01
Insomnia due to medical condition
Billable
G47.09
Other insomnia
Billable
G47.1
Hypersomnia
G47.10
Hypersomnia, unspecified
Billable
G47.11
Idiopathic hypersomnia with long sleep time
Billable
G47.12
Idiopathic hypersomnia without long sleep time
Billable
G47.13
Recurrent hypersomnia
Billable
G47.14
Hypersomnia due to medical condition
Billable
G47.19
Other hypersomnia
Billable
G47.2
Circadian rhythm sleep disorders
G47.20
Circadian rhythm sleep disorder, unspecified type
Billable
G47.21
Circadian rhythm sleep disorder, delayed sleep phase type
Billable
G47.22
Circadian rhythm sleep disorder, advanced sleep phase type
Billable
G47.23
Circadian rhythm sleep disorder, irregular sleep wake type
Billable
G47.24
Circadian rhythm sleep disorder, free running type
Billable
G47.25
Circadian rhythm sleep disorder, jet lag type
Billable
G47.26
Circadian rhythm sleep disorder, shift work type
Billable
G47.27
Circadian rhythm sleep disorder in conditions classified elsewhere
Billable
G47.29
Other circadian rhythm sleep disorder
Billable
G47.3
Sleep apnea
G47.30
Sleep apnea, unspecified
Billable
G47.31
Primary central sleep apnea
Billable
G47.32
High altitude periodic breathing
Billable
G47.33
Obstructive sleep apnea (adult) (pediatric)
Billable
G47.34
Idiopathic sleep related nonobstructive alveolar hypoventilation
Billable
G47.35
Congenital central alveolar hypoventilation syndrome
Billable
G47.36
Sleep related hypoventilation in conditions classified elsewhere
Billable
G47.37
Central sleep apnea in conditions classified elsewhere
Billable
G47.39
Other sleep apnea
Billable
G47.4
Narcolepsy and cataplexy
G47.41
Narcolepsy
G47.411
Narcolepsy with cataplexy
Billable
G47.419
Narcolepsy without cataplexy
Billable
G47.42
Narcolepsy in conditions classified elsewhere
G47.421
Narcolepsy in conditions classified elsewhere with cataplexy
Billable
G47.429
Narcolepsy in conditions classified elsewhere without cataplexy
Billable
G47.5
Parasomnia
G47.50
Parasomnia, unspecified
Billable
G47.51
Confusional arousals
Billable
G47.52
REM sleep behavior disorder
Billable
G47.53
Recurrent isolated sleep paralysis
Billable
G47.54
Parasomnia in conditions classified elsewhere
Billable
G47.59
Other parasomnia
Billable
G47.6
Sleep related movement disorders
G47.61
Periodic limb movement disorder
Billable
G47.62
Sleep related leg cramps
Billable
G47.63
Sleep related bruxism
Billable
G47.69
Other sleep related movement disorders
Billable
G47.8
Other sleep disorders
Billable
G47.9
Sleep disorder, unspecified
Billable

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Frequently Asked Questions
What are the common symptoms of epilepsy as classified under ICD-10 code G40?

Epilepsy, classified under ICD-10 code G40, commonly presents with recurrent seizures, which may include convulsions, temporary confusion, staring spells, and loss of consciousness. It's important for individuals experiencing these symptoms to seek medical evaluation for proper diagnosis and management.

How is migraine diagnosed and treated according to ICD-10 code G43?

Migraines, categorized under ICD-10 code G43, are diagnosed based on clinical history, symptom patterns, and ruling out other conditions. Treatment often involves medications such as triptans, preventive therapies, and lifestyle modifications to manage triggers and reduce frequency and severity of attacks.

What sleep disorders are included in ICD-10 code G47 and how are they managed?

ICD-10 code G47 encompasses various sleep disorders, including insomnia, sleep apnea, and narcolepsy. Management strategies vary by condition but may involve behavioral therapies, CPAP machines for sleep apnea, and medications like stimulants for narcolepsy to improve sleep quality and daytime alertness.

Episodic and paroxysmal disorders