G40-G47

Episodic and paroxysmal disorders

Diagnosis codes G40 to G47. Browse all 307 codes with descriptions, billable status, and coding guidelines.

307 Total Codes6 Top-LevelChapter 6

About Section G40-G47

Section G40-G47 covers Episodic and paroxysmal disorders within Chapter 6 of the ICD-10-CM Tabular List. This section includes diagnosis codes ranging from G40 to G47. Each code below includes its description, billable status, and links to detailed coding guidelines.

Diagnosis Codes 307 entries
G40Epilepsy and recurrent seizuresNon-Billable›G40.0Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onsetNon-Billable›G40.00Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, not intractableNon-Billable›G40.001Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, not intractable, with status epilepticusBillable›G40.009Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, not intractable, without status epilepticusBillable›G40.01Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, intractableNon-Billable›G40.011Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, intractable, with status epilepticusBillable›G40.019Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, intractable, without status epilepticusBillable›G40.1Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizuresNon-Billable›G40.10Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, not intractableNon-Billable›G40.101Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, not intractable, with status epilepticusBillable›G40.109Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, not intractable, without status epilepticusBillable›G40.11Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractableNon-Billable›G40.111Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable, with status epilepticusBillable›G40.119Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable, without status epilepticusBillable›G40.2Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizuresNon-Billable›G40.20Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractableNon-Billable›G40.201Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractable, with status epilepticusBillable›G40.209Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractable, without status epilepticusBillable›G40.21Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractableNon-Billable›G40.211Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractable, with status epilepticusBillable›G40.219Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractable, without status epilepticusBillable›G40.3Generalized idiopathic epilepsy and epileptic syndromesNon-Billable›G40.30Generalized idiopathic epilepsy and epileptic syndromes, not intractableNon-Billable›G40.301Generalized idiopathic epilepsy and epileptic syndromes, not intractable, with status epilepticusBillable›G40.309Generalized idiopathic epilepsy and epileptic syndromes, not intractable, without status epilepticusBillable›G40.31Generalized idiopathic epilepsy and epileptic syndromes, intractableNon-Billable›G40.311Generalized idiopathic epilepsy and epileptic syndromes, intractable, with status epilepticusBillable›G40.319Generalized idiopathic epilepsy and epileptic syndromes, intractable, without status epilepticusBillable›G40.4Other generalized epilepsy and epileptic syndromesNon-Billable›G40.40Other generalized epilepsy and epileptic syndromes, not intractableNon-Billable›G40.401Other generalized epilepsy and epileptic syndromes, not intractable, with status epilepticusBillable›G40.409Other generalized epilepsy and epileptic syndromes, not intractable, without status epilepticusBillable›G40.41Other generalized epilepsy and epileptic syndromes, intractableNon-Billable›G40.411Other generalized epilepsy and epileptic syndromes, intractable, with status epilepticusBillable›G40.419Other generalized epilepsy and epileptic syndromes, intractable, without status epilepticusBillable›G40.42Cyclin-Dependent Kinase-Like 5 Deficiency DisorderBillable›G40.5Epileptic seizures related to external causesNon-Billable›G40.50Epileptic seizures related to external causes, not intractableNon-Billable›G40.501Epileptic seizures related to external causes, not intractable, with status epilepticusBillable›G40.509Epileptic seizures related to external causes, not intractable, without status epilepticusBillable›G40.8Other epilepsy and recurrent seizuresNon-Billable›G40.80Other epilepsyNon-Billable›G40.801Other epilepsy, not intractable, with status epilepticusBillable›G40.802Other epilepsy, not intractable, without status epilepticusBillable›G40.803Other epilepsy, intractable, with status epilepticusBillable›G40.804Other epilepsy, intractable, without status epilepticusBillable›G40.81Lennox-Gastaut syndromeNon-Billable›G40.811Lennox-Gastaut syndrome, not intractable, with status epilepticusBillable›G40.812Lennox-Gastaut syndrome, not intractable, without status epilepticusBillable›G40.813Lennox-Gastaut syndrome, intractable, with status epilepticusBillable›G40.814Lennox-Gastaut syndrome, intractable, without status epilepticusBillable›G40.82Epileptic spasmsNon-Billable›G40.821Epileptic spasms, not intractable, with status epilepticusBillable›G40.822Epileptic spasms, not intractable, without status epilepticusBillable›G40.823Epileptic spasms, intractable, with status epilepticusBillable›G40.824Epileptic spasms, intractable, without status epilepticusBillable›G40.83Dravet syndromeNon-Billable›G40.833Dravet syndrome, intractable, with status epilepticusBillable›G40.834Dravet syndrome, intractable, without status epilepticusBillable›G40.84KCNQ2-related epilepsyNon-Billable›G40.841KCNQ2-related epilepsy, not intractable, with status epilepticusBillable›G40.842KCNQ2-related epilepsy, not intractable, without status epilepticusBillable›G40.843KCNQ2-related epilepsy, intractable, with status epilepticusBillable›G40.844KCNQ2-related epilepsy, intractable, without status epilepticusBillable›G40.89Other seizuresBillable›G40.9Epilepsy, unspecifiedNon-Billable›G40.90Epilepsy, unspecified, not intractableNon-Billable›G40.901Epilepsy, unspecified, not intractable, with status epilepticusBillable›G40.909Epilepsy, unspecified, not intractable, without status epilepticusBillable›G40.91Epilepsy, unspecified, intractableNon-Billable›G40.911Epilepsy, unspecified, intractable, with status epilepticusBillable›G40.919Epilepsy, unspecified, intractable, without status epilepticusBillable›G40.AAbsence epileptic syndromeNon-Billable›G40.A0Absence epileptic syndrome, not intractableNon-Billable›G40.A01Absence epileptic syndrome, not intractable, with status epilepticusBillable›G40.A09Absence epileptic syndrome, not intractable, without status epilepticusBillable›G40.A1Absence epileptic syndrome, intractableNon-Billable›G40.A11Absence epileptic syndrome, intractable, with status epilepticusBillable›G40.A19Absence epileptic syndrome, intractable, without status epilepticusBillable›G40.BJuvenile myoclonic epilepsy [impulsive petit mal]Non-Billable›G40.B0Juvenile myoclonic epilepsy, not intractableNon-Billable›G40.B01Juvenile myoclonic epilepsy, not intractable, with status epilepticusBillable›G40.B09Juvenile myoclonic epilepsy, not intractable, without status epilepticusBillable›G40.B1Juvenile myoclonic epilepsy, intractableNon-Billable›G40.B11Juvenile myoclonic epilepsy, intractable, with status epilepticusBillable›G40.B19Juvenile myoclonic epilepsy, intractable, without status epilepticusBillable›G40.CLafora progressive myoclonus epilepsyNon-Billable›G40.C0Lafora progressive myoclonus epilepsy, not intractableNon-Billable›G40.C01Lafora progressive myoclonus epilepsy, not intractable, with status epilepticusBillable›G40.C09Lafora progressive myoclonus epilepsy, not intractable, without status epilepticusBillable›G40.C1Lafora progressive myoclonus epilepsy, intractableNon-Billable›G40.C11Lafora progressive myoclonus epilepsy, intractable, with status epilepticusBillable›G40.C19Lafora progressive myoclonus epilepsy, intractable, without status epilepticusBillable›G43MigraineNon-Billable›G43.0Migraine without auraNon-Billable›G43.00Migraine without aura, not intractableNon-Billable›G43.001Migraine without aura, not intractable, with status migrainosusBillable›G43.009Migraine without aura, not intractable, without status migrainosusBillable›G43.01Migraine without aura, intractableNon-Billable›G43.011Migraine without aura, intractable, with status migrainosusBillable›G43.019Migraine without aura, intractable, without status migrainosusBillable›G43.1Migraine with auraNon-Billable›G43.10Migraine with aura, not intractableNon-Billable›G43.101Migraine with aura, not intractable, with status migrainosusBillable›G43.109Migraine with aura, not intractable, without status migrainosusBillable›G43.11Migraine with aura, intractableNon-Billable›G43.111Migraine with aura, intractable, with status migrainosusBillable›G43.119Migraine with aura, intractable, without status migrainosusBillable›G43.4Hemiplegic migraineNon-Billable›G43.40Hemiplegic migraine, not intractableNon-Billable›G43.401Hemiplegic migraine, not intractable, with status migrainosusBillable›G43.409Hemiplegic migraine, not intractable, without status migrainosusBillable›G43.41Hemiplegic migraine, intractableNon-Billable›G43.411Hemiplegic migraine, intractable, with status migrainosusBillable›G43.419Hemiplegic migraine, intractable, without status migrainosusBillable›G43.5Persistent migraine aura without cerebral infarctionNon-Billable›G43.50Persistent migraine aura without cerebral infarction, not intractableNon-Billable›G43.501Persistent migraine aura without cerebral infarction, not intractable, with status migrainosusBillable›G43.509Persistent migraine aura without cerebral infarction, not intractable, without status migrainosusBillable›G43.51Persistent migraine aura without cerebral infarction, intractableNon-Billable›G43.511Persistent migraine aura without cerebral infarction, intractable, with status migrainosusBillable›G43.519Persistent migraine aura without cerebral infarction, intractable, without status migrainosusBillable›G43.6Persistent migraine aura with cerebral infarctionNon-Billable›G43.60Persistent migraine aura with cerebral infarction, not intractableNon-Billable›G43.601Persistent migraine aura with cerebral infarction, not intractable, with status migrainosusBillable›G43.609Persistent migraine aura with cerebral infarction, not intractable, without status migrainosusBillable›G43.61Persistent migraine aura with cerebral infarction, intractableNon-Billable›G43.611Persistent migraine aura with cerebral infarction, intractable, with status migrainosusBillable›G43.619Persistent migraine aura with cerebral infarction, intractable, without status migrainosusBillable›G43.7Chronic migraine without auraNon-Billable›G43.70Chronic migraine without aura, not intractableNon-Billable›G43.701Chronic migraine without aura, not intractable, with status migrainosusBillable›G43.709Chronic migraine without aura, not intractable, without status migrainosusBillable›G43.71Chronic migraine without aura, intractableNon-Billable›G43.711Chronic migraine without aura, intractable, with status migrainosusBillable›G43.719Chronic migraine without aura, intractable, without status migrainosusBillable›G43.8Other migraineNon-Billable›G43.80Other migraine, not intractableNon-Billable›G43.801Other migraine, not intractable, with status migrainosusBillable›G43.809Other migraine, not intractable, without status migrainosusBillable›G43.81Other migraine, intractableNon-Billable›G43.811Other migraine, intractable, with status migrainosusBillable›G43.819Other migraine, intractable, without status migrainosusBillable›G43.82Menstrual migraine, not intractableNon-Billable›G43.821Menstrual migraine, not intractable, with status migrainosusBillable›G43.829Menstrual migraine, not intractable, without status migrainosusBillable›G43.83Menstrual migraine, intractableNon-Billable›G43.831Menstrual migraine, intractable, with status migrainosusBillable›G43.839Menstrual migraine, intractable, without status migrainosusBillable›G43.9Migraine, unspecifiedNon-Billable›G43.90Migraine, unspecified, not intractableNon-Billable›G43.901Migraine, unspecified, not intractable, with status migrainosusBillable›G43.909Migraine, unspecified, not intractable, without status migrainosusBillable›G43.91Migraine, unspecified, intractableNon-Billable›G43.911Migraine, unspecified, intractable, with status migrainosusBillable›G43.919Migraine, unspecified, intractable, without status migrainosusBillable›G43.ACyclical vomitingNon-Billable›G43.A0Cyclical vomiting, in migraine, not intractableBillable›G43.A1Cyclical vomiting, in migraine, intractableBillable›G43.BOphthalmoplegic migraineNon-Billable›G43.B0Ophthalmoplegic migraine, not intractableBillable›G43.B1Ophthalmoplegic migraine, intractableBillable›G43.CPeriodic headache syndromes in child or adultNon-Billable›G43.C0Periodic headache syndromes in child or adult, not intractableBillable›G43.C1Periodic headache syndromes in child or adult, intractableBillable›G43.DAbdominal migraineNon-Billable›G43.D0Abdominal migraine, not intractableBillable›G43.D1Abdominal migraine, intractableBillable›G43.EChronic migraine with auraNon-Billable›G43.E0Chronic migraine with aura, not intractableNon-Billable›G43.E01Chronic migraine with aura, not intractable, with status migrainosusBillable›G43.E09Chronic migraine with aura, not intractable, without status migrainosusBillable›G43.E1Chronic migraine with aura, intractableNon-Billable›G43.E11Chronic migraine with aura, intractable, with status migrainosusBillable›G43.E19Chronic migraine with aura, intractable, without status migrainosusBillable›G44Other headache syndromesNon-Billable›G44.0Cluster headaches and other trigeminal autonomic cephalgias (TAC)Non-Billable›G44.00Cluster headache syndrome, unspecifiedNon-Billable›G44.001Cluster headache syndrome, unspecified, intractableBillable›G44.009Cluster headache syndrome, unspecified, not intractableBillable›G44.01Episodic cluster headacheNon-Billable›G44.011Episodic cluster headache, intractableBillable›G44.019Episodic cluster headache, not intractableBillable›G44.02Chronic cluster headacheNon-Billable›G44.021Chronic cluster headache, intractableBillable›G44.029Chronic cluster headache, not intractableBillable›G44.03Episodic paroxysmal hemicraniaNon-Billable›G44.031Episodic paroxysmal hemicrania, intractableBillable›G44.039Episodic paroxysmal hemicrania, not intractableBillable›G44.04Chronic paroxysmal hemicraniaNon-Billable›G44.041Chronic paroxysmal hemicrania, intractableBillable›G44.049Chronic paroxysmal hemicrania, not intractableBillable›G44.05Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT)Non-Billable›G44.051Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), intractableBillable›G44.059Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), not intractableBillable›G44.09Other trigeminal autonomic cephalgias (TAC)Non-Billable›G44.091Other trigeminal autonomic cephalgias (TAC), intractableBillable›G44.099Other trigeminal autonomic cephalgias (TAC), not intractableBillable›G44.1Vascular headache, not elsewhere classifiedBillable›G44.2Tension-type headacheNon-Billable›G44.20Tension-type headache, unspecifiedNon-Billable›G44.201Tension-type headache, unspecified, intractableBillable›G44.209Tension-type headache, unspecified, not intractableBillable›G44.21Episodic tension-type headacheNon-Billable›G44.211Episodic tension-type headache, intractableBillable›G44.219Episodic tension-type headache, not intractableBillable›G44.22Chronic tension-type headacheNon-Billable›G44.221Chronic tension-type headache, intractableBillable›G44.229Chronic tension-type headache, not intractableBillable›G44.3Post-traumatic headacheNon-Billable›G44.30Post-traumatic headache, unspecifiedNon-Billable›G44.301Post-traumatic headache, unspecified, intractableBillable›G44.309Post-traumatic headache, unspecified, not intractableBillable›G44.31Acute post-traumatic headacheNon-Billable›G44.311Acute post-traumatic headache, intractableBillable›G44.319Acute post-traumatic headache, not intractableBillable›G44.32Chronic post-traumatic headacheNon-Billable›G44.321Chronic post-traumatic headache, intractableBillable›G44.329Chronic post-traumatic headache, not intractableBillable›G44.4Drug-induced headache, not elsewhere classifiedNon-Billable›G44.40Drug-induced headache, not elsewhere classified, not intractableBillable›G44.41Drug-induced headache, not elsewhere classified, intractableBillable›G44.5Complicated headache syndromesNon-Billable›G44.51Hemicrania continuaBillable›G44.52New daily persistent headache (NDPH)Billable›G44.53Primary thunderclap headacheBillable›G44.59Other complicated headache syndromeBillable›G44.8Other specified headache syndromesNon-Billable›G44.81Hypnic headacheBillable›G44.82Headache associated with sexual activityBillable›G44.83Primary cough headacheBillable›G44.84Primary exertional headacheBillable›G44.85Primary stabbing headacheBillable›G44.86Cervicogenic headacheBillable›G44.89Other headache syndromeBillable›G45Transient cerebral ischemic attacks and related syndromesNon-Billable›G45.0Vertebro-basilar artery syndromeBillable›G45.1Carotid artery syndrome (hemispheric)Billable›G45.2Multiple and bilateral precerebral artery syndromesBillable›G45.3Amaurosis fugaxBillable›G45.4Transient global amnesiaBillable›G45.8Other transient cerebral ischemic attacks and related syndromesBillable›G45.9Transient cerebral ischemic attack, unspecifiedBillable›G46Vascular syndromes of brain in cerebrovascular diseasesNon-Billable›G46.0Middle cerebral artery syndromeBillable›G46.1Anterior cerebral artery syndromeBillable›G46.2Posterior cerebral artery syndromeBillable›G46.3Brain stem stroke syndromeBillable›G46.4Cerebellar stroke syndromeBillable›G46.5Pure motor lacunar syndromeBillable›G46.6Pure sensory lacunar syndromeBillable›G46.7Other lacunar syndromesBillable›G46.8Other vascular syndromes of brain in cerebrovascular diseasesBillable›G47Sleep disordersNon-Billable›G47.0InsomniaNon-Billable›G47.00Insomnia, unspecifiedBillable›G47.01Insomnia due to medical conditionBillable›G47.09Other insomniaBillable›G47.1HypersomniaNon-Billable›G47.10Hypersomnia, unspecifiedBillable›G47.11Idiopathic hypersomnia with long sleep timeBillable›G47.12Idiopathic hypersomnia without long sleep timeBillable›G47.13Recurrent hypersomniaBillable›G47.14Hypersomnia due to medical conditionBillable›G47.19Other hypersomniaBillable›G47.2Circadian rhythm sleep disordersNon-Billable›G47.20Circadian rhythm sleep disorder, unspecified typeBillable›G47.21Circadian rhythm sleep disorder, delayed sleep phase typeBillable›G47.22Circadian rhythm sleep disorder, advanced sleep phase typeBillable›G47.23Circadian rhythm sleep disorder, irregular sleep wake typeBillable›G47.24Circadian rhythm sleep disorder, free running typeBillable›G47.25Circadian rhythm sleep disorder, jet lag typeBillable›G47.26Circadian rhythm sleep disorder, shift work typeBillable›G47.27Circadian rhythm sleep disorder in conditions classified elsewhereBillable›G47.29Other circadian rhythm sleep disorderBillable›G47.3Sleep apneaNon-Billable›G47.30Sleep apnea, unspecifiedBillable›G47.31Primary central sleep apneaBillable›G47.32High altitude periodic breathingBillable›G47.33Obstructive sleep apnea (adult) (pediatric)Billable›G47.34Idiopathic sleep related nonobstructive alveolar hypoventilationBillable›G47.35Congenital central alveolar hypoventilation syndromeBillable›G47.36Sleep related hypoventilation in conditions classified elsewhereBillable›G47.37Central sleep apnea in conditions classified elsewhereBillable›G47.39Other sleep apneaBillable›G47.4Narcolepsy and cataplexyNon-Billable›G47.41NarcolepsyNon-Billable›G47.411Narcolepsy with cataplexyBillable›G47.419Narcolepsy without cataplexyBillable›G47.42Narcolepsy in conditions classified elsewhereNon-Billable›G47.421Narcolepsy in conditions classified elsewhere with cataplexyBillable›G47.429Narcolepsy in conditions classified elsewhere without cataplexyBillable›G47.5ParasomniaNon-Billable›G47.50Parasomnia, unspecifiedBillable›G47.51Confusional arousalsBillable›G47.52REM sleep behavior disorderBillable›G47.53Recurrent isolated sleep paralysisBillable›G47.54Parasomnia in conditions classified elsewhereBillable›G47.59Other parasomniaBillable›G47.6Sleep related movement disordersNon-Billable›G47.61Periodic limb movement disorderBillable›G47.62Sleep related leg crampsBillable›G47.63Sleep related bruxismBillable›G47.69Other sleep related movement disordersBillable›G47.8Other sleep disordersBillable›G47.9Sleep disorder, unspecifiedBillable›