Episodic and paroxysmal disorders (G40-G47)

Browse all the diagnosis codes used for episodic and paroxysmal disorders (g40-g47). For easy navigation, the diagnosis codes are sorted in alphabetical order and grouped by sections. Each section is clearly marked with its description, and the corresponding three-digit code range. This format makes it simple to browse diagnosis codes in this chapter or section and find what you're looking for. We've also added green checkmark icons to label billable codes, and red warning icons for non-billable ones. This makes it easy to identify which codes can be billed.
  • Diseases of the nervous system (G00–G99)

    • Episodic and paroxysmal disorders (G40-G47)

        • Epilepsy and recurrent seizures (G40)

        • 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
        • G40.009 Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, not intractable, without status epilepticus
        • 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
        • G40.019 Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, intractable, without status epilepticus
        • 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
        • G40.109 Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, not intractable, without status epilepticus
        • 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
        • G40.119 Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable, without status epilepticus
        • 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
        • G40.209 Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractable, without status epilepticus
        • 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
        • G40.219 Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractable, without status epilepticus
        • 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
        • G40.309 Generalized idiopathic epilepsy and epileptic syndromes, not intractable, without status epilepticus
        • G40.31 Generalized idiopathic epilepsy and epileptic syndromes, intractable
        • G40.311 Generalized idiopathic epilepsy and epileptic syndromes, intractable, with status epilepticus
        • G40.319 Generalized idiopathic epilepsy and epileptic syndromes, intractable, without status epilepticus
        • 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
        • G40.409 Other generalized epilepsy and epileptic syndromes, not intractable, without status epilepticus
        • G40.41 Other generalized epilepsy and epileptic syndromes, intractable
        • G40.411 Other generalized epilepsy and epileptic syndromes, intractable, with status epilepticus
        • G40.419 Other generalized epilepsy and epileptic syndromes, intractable, without status epilepticus
        • G40.42 Cyclin-Dependent Kinase-Like 5 Deficiency Disorder
        • 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
        • G40.509 Epileptic seizures related to external causes, not intractable, without status epilepticus
        • G40.8 Other epilepsy and recurrent seizures
        • G40.80 Other epilepsy
        • G40.801 Other epilepsy, not intractable, with status epilepticus
        • G40.802 Other epilepsy, not intractable, without status epilepticus
        • G40.803 Other epilepsy, intractable, with status epilepticus
        • G40.804 Other epilepsy, intractable, without status epilepticus
        • G40.81 Lennox-Gastaut syndrome
        • G40.811 Lennox-Gastaut syndrome, not intractable, with status epilepticus
        • G40.812 Lennox-Gastaut syndrome, not intractable, without status epilepticus
        • G40.813 Lennox-Gastaut syndrome, intractable, with status epilepticus
        • G40.814 Lennox-Gastaut syndrome, intractable, without status epilepticus
        • G40.82 Epileptic spasms
        • G40.821 Epileptic spasms, not intractable, with status epilepticus
        • G40.822 Epileptic spasms, not intractable, without status epilepticus
        • G40.823 Epileptic spasms, intractable, with status epilepticus
        • G40.824 Epileptic spasms, intractable, without status epilepticus
        • G40.83 Dravet syndrome
        • G40.833 Dravet syndrome, intractable, with status epilepticus
        • G40.834 Dravet syndrome, intractable, without status epilepticus
        • G40.89 Other seizures
        • G40.9 Epilepsy, unspecified
        • G40.90 Epilepsy, unspecified, not intractable
        • G40.901 Epilepsy, unspecified, not intractable, with status epilepticus
        • G40.909 Epilepsy, unspecified, not intractable, without status epilepticus
        • G40.91 Epilepsy, unspecified, intractable
        • G40.911 Epilepsy, unspecified, intractable, with status epilepticus
        • G40.919 Epilepsy, unspecified, intractable, without status epilepticus
        • G40.A Absence epileptic syndrome
        • G40.A0 Absence epileptic syndrome, not intractable
        • G40.A01 Absence epileptic syndrome, not intractable, with status epilepticus
        • G40.A09 Absence epileptic syndrome, not intractable, without status epilepticus
        • G40.A1 Absence epileptic syndrome, intractable
        • G40.A11 Absence epileptic syndrome, intractable, with status epilepticus
        • G40.A19 Absence epileptic syndrome, intractable, without status epilepticus
        • 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
        • G40.B09 Juvenile myoclonic epilepsy, not intractable, without status epilepticus
        • G40.B1 Juvenile myoclonic epilepsy, intractable
        • G40.B11 Juvenile myoclonic epilepsy, intractable, with status epilepticus
        • G40.B19 Juvenile myoclonic epilepsy, intractable, without status epilepticus
        • G40.C Lafora progressive myoclonus epilepsy NEW CODE
        • G40.C0 Lafora progressive myoclonus epilepsy, not intractable NEW CODE
        • G40.C01 Lafora progressive myoclonus epilepsy, not intractable, with status epilepticus NEW CODE
        • G40.C09 Lafora progressive myoclonus epilepsy, not intractable, without status epilepticus NEW CODE
        • G40.C1 Lafora progressive myoclonus epilepsy, intractable NEW CODE
        • G40.C11 Lafora progressive myoclonus epilepsy, intractable, with status epilepticus NEW CODE
        • G40.C19 Lafora progressive myoclonus epilepsy, intractable, without status epilepticus NEW CODE
        • Migraine (G43)

        • G43 Migraine
        • G43.0 Migraine without aura
        • G43.00 Migraine without aura, not intractable
        • G43.001 Migraine without aura, not intractable, with status migrainosus
        • G43.009 Migraine without aura, not intractable, without status migrainosus
        • G43.01 Migraine without aura, intractable
        • G43.011 Migraine without aura, intractable, with status migrainosus
        • G43.019 Migraine without aura, intractable, without status migrainosus
        • G43.1 Migraine with aura
        • G43.10 Migraine with aura, not intractable
        • G43.101 Migraine with aura, not intractable, with status migrainosus
        • G43.109 Migraine with aura, not intractable, without status migrainosus
        • G43.11 Migraine with aura, intractable
        • G43.111 Migraine with aura, intractable, with status migrainosus
        • G43.119 Migraine with aura, intractable, without status migrainosus
        • G43.4 Hemiplegic migraine
        • G43.40 Hemiplegic migraine, not intractable
        • G43.401 Hemiplegic migraine, not intractable, with status migrainosus
        • G43.409 Hemiplegic migraine, not intractable, without status migrainosus
        • G43.41 Hemiplegic migraine, intractable
        • G43.411 Hemiplegic migraine, intractable, with status migrainosus
        • G43.419 Hemiplegic migraine, intractable, without status migrainosus
        • 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
        • G43.509 Persistent migraine aura without cerebral infarction, not intractable, without status migrainosus
        • G43.51 Persistent migraine aura without cerebral infarction, intractable
        • G43.511 Persistent migraine aura without cerebral infarction, intractable, with status migrainosus
        • G43.519 Persistent migraine aura without cerebral infarction, intractable, without status migrainosus
        • 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
        • G43.609 Persistent migraine aura with cerebral infarction, not intractable, without status migrainosus
        • G43.61 Persistent migraine aura with cerebral infarction, intractable
        • G43.611 Persistent migraine aura with cerebral infarction, intractable, with status migrainosus
        • G43.619 Persistent migraine aura with cerebral infarction, intractable, without status migrainosus
        • 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
        • G43.709 Chronic migraine without aura, not intractable, without status migrainosus
        • G43.71 Chronic migraine without aura, intractable
        • G43.711 Chronic migraine without aura, intractable, with status migrainosus
        • G43.719 Chronic migraine without aura, intractable, without status migrainosus
        • G43.8 Other migraine
        • G43.80 Other migraine, not intractable
        • G43.801 Other migraine, not intractable, with status migrainosus
        • G43.809 Other migraine, not intractable, without status migrainosus
        • G43.81 Other migraine, intractable
        • G43.811 Other migraine, intractable, with status migrainosus
        • G43.819 Other migraine, intractable, without status migrainosus
        • G43.82 Menstrual migraine, not intractable
        • G43.821 Menstrual migraine, not intractable, with status migrainosus
        • G43.829 Menstrual migraine, not intractable, without status migrainosus
        • G43.83 Menstrual migraine, intractable
        • G43.831 Menstrual migraine, intractable, with status migrainosus
        • G43.839 Menstrual migraine, intractable, without status migrainosus
        • G43.9 Migraine, unspecified
        • G43.90 Migraine, unspecified, not intractable
        • G43.901 Migraine, unspecified, not intractable, with status migrainosus
        • G43.909 Migraine, unspecified, not intractable, without status migrainosus
        • G43.91 Migraine, unspecified, intractable
        • G43.911 Migraine, unspecified, intractable, with status migrainosus
        • G43.919 Migraine, unspecified, intractable, without status migrainosus
        • G43.A Cyclical vomiting
        • G43.A0 Cyclical vomiting, in migraine, not intractable
        • G43.A1 Cyclical vomiting, in migraine, intractable
        • G43.B Ophthalmoplegic migraine
        • G43.B0 Ophthalmoplegic migraine, not intractable
        • G43.B1 Ophthalmoplegic migraine, intractable
        • G43.C Periodic headache syndromes in child or adult
        • G43.C0 Periodic headache syndromes in child or adult, not intractable
        • G43.C1 Periodic headache syndromes in child or adult, intractable
        • G43.D Abdominal migraine
        • G43.D0 Abdominal migraine, not intractable
        • G43.D1 Abdominal migraine, intractable
        • G43.E Chronic migraine with aura NEW CODE
        • G43.E0 Chronic migraine with aura, not intractable NEW CODE
        • G43.E01 Chronic migraine with aura, not intractable, with status migrainosus NEW CODE
        • G43.E09 Chronic migraine with aura, not intractable, without status migrainosus NEW CODE
        • G43.E1 Chronic migraine with aura, intractable NEW CODE
        • G43.E11 Chronic migraine with aura, intractable, with status migrainosus NEW CODE
        • G43.E19 Chronic migraine with aura, intractable, without status migrainosus NEW CODE
        • Other headache syndromes (G44)

        • 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
        • G44.009 Cluster headache syndrome, unspecified, not intractable
        • G44.01 Episodic cluster headache
        • G44.011 Episodic cluster headache, intractable
        • G44.019 Episodic cluster headache, not intractable
        • G44.02 Chronic cluster headache
        • G44.021 Chronic cluster headache, intractable
        • G44.029 Chronic cluster headache, not intractable
        • G44.03 Episodic paroxysmal hemicrania
        • G44.031 Episodic paroxysmal hemicrania, intractable
        • G44.039 Episodic paroxysmal hemicrania, not intractable
        • G44.04 Chronic paroxysmal hemicrania
        • G44.041 Chronic paroxysmal hemicrania, intractable
        • G44.049 Chronic paroxysmal hemicrania, not intractable
        • 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
        • G44.059 Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), not intractable
        • G44.09 Other trigeminal autonomic cephalgias (TAC)
        • G44.091 Other trigeminal autonomic cephalgias (TAC), intractable
        • G44.099 Other trigeminal autonomic cephalgias (TAC), not intractable
        • G44.1 Vascular headache, not elsewhere classified
        • G44.2 Tension-type headache
        • G44.20 Tension-type headache, unspecified
        • G44.201 Tension-type headache, unspecified, intractable
        • G44.209 Tension-type headache, unspecified, not intractable
        • G44.21 Episodic tension-type headache
        • G44.211 Episodic tension-type headache, intractable
        • G44.219 Episodic tension-type headache, not intractable
        • G44.22 Chronic tension-type headache
        • G44.221 Chronic tension-type headache, intractable
        • G44.229 Chronic tension-type headache, not intractable
        • G44.3 Post-traumatic headache
        • G44.30 Post-traumatic headache, unspecified
        • G44.301 Post-traumatic headache, unspecified, intractable
        • G44.309 Post-traumatic headache, unspecified, not intractable
        • G44.31 Acute post-traumatic headache
        • G44.311 Acute post-traumatic headache, intractable
        • G44.319 Acute post-traumatic headache, not intractable
        • G44.32 Chronic post-traumatic headache
        • G44.321 Chronic post-traumatic headache, intractable
        • G44.329 Chronic post-traumatic headache, not intractable
        • G44.4 Drug-induced headache, not elsewhere classified
        • G44.40 Drug-induced headache, not elsewhere classified, not intractable
        • G44.41 Drug-induced headache, not elsewhere classified, intractable
        • G44.5 Complicated headache syndromes
        • G44.51 Hemicrania continua
        • G44.52 New daily persistent headache (NDPH)
        • G44.53 Primary thunderclap headache
        • G44.59 Other complicated headache syndrome
        • G44.8 Other specified headache syndromes
        • G44.81 Hypnic headache
        • G44.82 Headache associated with sexual activity
        • G44.83 Primary cough headache
        • G44.84 Primary exertional headache
        • G44.85 Primary stabbing headache
        • G44.86 Cervicogenic headache
        • G44.89 Other headache syndrome
        • Sleep disorders (G47)

        • G47 Sleep disorders
        • G47.0 Insomnia
        • G47.00 Insomnia, unspecified
        • G47.01 Insomnia due to medical condition
        • G47.09 Other insomnia
        • G47.1 Hypersomnia
        • G47.10 Hypersomnia, unspecified
        • G47.11 Idiopathic hypersomnia with long sleep time
        • G47.12 Idiopathic hypersomnia without long sleep time
        • G47.13 Recurrent hypersomnia
        • G47.14 Hypersomnia due to medical condition
        • G47.19 Other hypersomnia
        • G47.2 Circadian rhythm sleep disorders
        • G47.20 Circadian rhythm sleep disorder, unspecified type
        • G47.21 Circadian rhythm sleep disorder, delayed sleep phase type
        • G47.22 Circadian rhythm sleep disorder, advanced sleep phase type
        • G47.23 Circadian rhythm sleep disorder, irregular sleep wake type
        • G47.24 Circadian rhythm sleep disorder, free running type
        • G47.25 Circadian rhythm sleep disorder, jet lag type
        • G47.26 Circadian rhythm sleep disorder, shift work type
        • G47.27 Circadian rhythm sleep disorder in conditions classified elsewhere
        • G47.29 Other circadian rhythm sleep disorder
        • G47.3 Sleep apnea
        • G47.30 Sleep apnea, unspecified
        • G47.31 Primary central sleep apnea
        • G47.32 High altitude periodic breathing
        • G47.33 Obstructive sleep apnea (adult) (pediatric)
        • G47.34 Idiopathic sleep related nonobstructive alveolar hypoventilation
        • G47.35 Congenital central alveolar hypoventilation syndrome
        • G47.36 Sleep related hypoventilation in conditions classified elsewhere
        • G47.37 Central sleep apnea in conditions classified elsewhere
        • G47.39 Other sleep apnea
        • G47.4 Narcolepsy and cataplexy
        • G47.41 Narcolepsy
        • G47.411 Narcolepsy with cataplexy
        • G47.419 Narcolepsy without cataplexy
        • G47.42 Narcolepsy in conditions classified elsewhere
        • G47.421 Narcolepsy in conditions classified elsewhere with cataplexy
        • G47.429 Narcolepsy in conditions classified elsewhere without cataplexy
        • G47.5 Parasomnia
        • G47.50 Parasomnia, unspecified
        • G47.51 Confusional arousals
        • G47.52 REM sleep behavior disorder
        • G47.53 Recurrent isolated sleep paralysis
        • G47.54 Parasomnia in conditions classified elsewhere
        • G47.59 Other parasomnia
        • G47.6 Sleep related movement disorders
        • G47.61 Periodic limb movement disorder
        • G47.62 Sleep related leg cramps
        • G47.63 Sleep related bruxism
        • G47.69 Other sleep related movement disorders
        • G47.8 Other sleep disorders
        • G47.9 Sleep disorder, unspecified