G40-G47
Episodic and paroxysmal disorders
Codes in this block
307 codes
Billableusable codeNon-billableheader / grouping codeRisk-adjusting
- 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
Official Guidelines for G40-G47
FY 2026 ›Sections that reference codes in G40-G47