ICD-10 · PDGM grouping
G40-G47 — Episodic and paroxysmal disorders
Every ICD-10-CM code in this range and the PDGM clinical group CMS assigns to it, read from the CMS grouper crosswalk v07.1.26.
OASIS-E2 v1.00.0 · ingested 2026-04-26
Codes in range
205
No clinical group
15
A period cannot be grouped from these.
Barred as primary
0
CMS rejects these in the primary position.
Where these codes group
181 of the 205 codes in G40-G47 group to MMTA - Other, but the range is not uniform — it spreads across 3 clinical groups. A further 15 are assigned no clinical group at all, which means a 30-day period cannot be grouped from them.
Every code in G40-G47
Descriptions are CMS’s own, abbreviated as CMS abbreviates them.
| Code | Description | Clinical group | Primary position |
|---|---|---|---|
| G40001 | Local-rel idio epi w seiz of loc onst, not ntrct, w stat epi | A | Accepted |
| G40009 | Local-rel idio epi w seiz of loc onst,not ntrct,w/o stat epi | A | Accepted |
| G40011 | Local-rel idio epi w seiz of loc onset, ntrct, w stat epi | A | Accepted |
| G40019 | Local-rel idio epi w seiz of loc onset, ntrct, w/o stat epi | A | Accepted |
| G40101 | Local-rel symptc epi w simp part seiz, not ntrct, w stat epi | A | Accepted |
| G40109 | Local-rel symptc epi w simp prt seiz,not ntrct, w/o stat epi | A | Accepted |
| G40111 | Local-rel symptc epi w simple part seiz, ntrct, w stat epi | A | Accepted |
| G40119 | Local-rel symptc epi w simple part seiz, ntrct, w/o stat epi | A | Accepted |
| G40201 | Local-rel symptc epi w cmplx prt seiz, not ntrct, w stat epi | A | Accepted |
| G40209 | Local-rel symptc epi w cmplx prt seiz,not ntrct,w/o stat epi | A | Accepted |
| G40211 | Local-rel symptc epi w cmplx partial seiz, ntrct, w stat epi | A | Accepted |
| G40219 | Local-rel symptc epi w cmplx part seiz, ntrct, w/o stat epi | A | Accepted |
| G40301 | Gen idiopathic epilepsy, not intractable, w stat epi | A | Accepted |
| G40309 | Gen idiopathic epilepsy, not intractable, w/o stat epi | A | Accepted |
| G40311 | Generalized idiopathic epilepsy, intractable, w stat epi | A | Accepted |
| G40319 | Generalized idiopathic epilepsy, intractable, w/o stat epi | A | Accepted |
| G40401 | Oth generalized epilepsy, not intractable, w stat epi | A | Accepted |
| G40409 | Oth generalized epilepsy, not intractable, w/o stat epi | A | Accepted |
| G40411 | Oth generalized epilepsy, intractable, w status epilepticus | A | Accepted |
| G40419 | Oth generalized epilepsy, intractable, w/o stat epi | A | Accepted |
| G4042 | Cyclin-Dependent Kinase-Like 5 Deficiency Disorder | B | Accepted |
| G40501 | Epileptic seiz rel to extrn causes, not ntrct, w stat epi | A | Accepted |
| G40509 | Epileptic seiz rel to extrn causes, not ntrct, w/o stat epi | A | Accepted |
| G40801 | Other epilepsy, not intractable, with status epilepticus | A | Accepted |
| G40802 | Other epilepsy, not intractable, without status epilepticus | A | Accepted |
| G40803 | Other epilepsy, intractable, with status epilepticus | A | Accepted |
| G40804 | Other epilepsy, intractable, without status epilepticus | A | Accepted |
| G40811 | Lennox-Gastaut syndrome, not intractable, w stat epi | A | Accepted |
| G40812 | Lennox-Gastaut syndrome, not intractable, w/o stat epi | A | Accepted |
| G40813 | Lennox-Gastaut syndrome, intractable, w status epilepticus | A | Accepted |
| G40814 | Lennox-Gastaut syndrome, intractable, w/o status epilepticus | A | Accepted |
| G40821 | Epileptic spasms, not intractable, with status epilepticus | A | Accepted |
| G40822 | Epileptic spasms, not intractable, w/o status epilepticus | A | Accepted |
| G40823 | Epileptic spasms, intractable, with status epilepticus | A | Accepted |
| G40824 | Epileptic spasms, intractable, without status epilepticus | A | Accepted |
| G40833 | Dravet syndrome, intractable, with status epilepticus | A | Accepted |
| G40834 | Dravet syndrome, intractable, without status epilepticus | A | Accepted |
| G40841 | KCNQ2-related epilepsy, not intractable, with stat epi | A | Accepted |
| G40842 | KCNQ2-related epilepsy, not intractable, without stat epi | A | Accepted |
| G40843 | KCNQ2-related epilepsy, intractable, with status epilepticus | A | Accepted |
| G40844 | KCNQ2-related epilepsy, intractable, without stat epi | A | Accepted |
| G4089 | Other seizures | A | Accepted |
| G40901 | Epilepsy, unsp, not intractable, with status epilepticus | A | Accepted |
| G40909 | Epilepsy, unsp, not intractable, without status epilepticus | A | Accepted |
| G40911 | Epilepsy, unspecified, intractable, with status epilepticus | A | Accepted |
| G40919 | Epilepsy, unsp, intractable, without status epilepticus | A | Accepted |
| G40A01 | Absence epileptic syndrome, not intractable, w stat epi | A | Accepted |
| G40A09 | Absence epileptic syndrome, not intractable, w/o stat epi | A | Accepted |
| G40A11 | Absence epileptic syndrome, intractable, w stat epi | A | Accepted |
| G40A19 | Absence epileptic syndrome, intractable, w/o stat epi | A | Accepted |
| G40B01 | Juvenile myoclonic epilepsy, not intractable, w stat epi | A | Accepted |
| G40B09 | Juvenile myoclonic epilepsy, not intractable, w/o stat epi | A | Accepted |
| G40B11 | Juvenile myoclonic epilepsy, intractable, w stat epi | A | Accepted |
| G40B19 | Juvenile myoclonic epilepsy, intractable, w/o stat epi | A | Accepted |
| G40C01 | Lafora progr myoclonus epilepsy, not ntrct, with stat epi | A | Accepted |
| G40C09 | Lafora progr myoclonus epilepsy, not ntrct, without stat epi | A | Accepted |
| G40C11 | Lafora progressive myoclonus epilepsy, ntrct, with stat epi | A | Accepted |
| G40C19 | Lafora progr myoclonus epilepsy, ntrct, without stat epi | A | Accepted |
| G43001 | Migraine w/o aura, not intractable, with status migrainosus | A | Accepted |
| G43009 | Migraine w/o aura, not intractable, w/o status migrainosus | A | Accepted |
| G43011 | Migraine without aura, intractable, with status migrainosus | A | Accepted |
| G43019 | Migraine w/o aura, intractable, without status migrainosus | A | Accepted |
| G43101 | Migraine with aura, not intractable, with status migrainosus | A | Accepted |
| G43109 | Migraine with aura, not intractable, w/o status migrainosus | A | Accepted |
| G43111 | Migraine with aura, intractable, with status migrainosus | A | Accepted |
| G43119 | Migraine with aura, intractable, without status migrainosus | A | Accepted |
| G43401 | Hemiplegic migraine, not intractable, w status migrainosus | A | Accepted |
| G43409 | Hemiplegic migraine, not intractable, w/o status migrainosus | A | Accepted |
| G43411 | Hemiplegic migraine, intractable, with status migrainosus | A | Accepted |
| G43419 | Hemiplegic migraine, intractable, without status migrainosus | A | Accepted |
| G43501 | Perst migraine aura w/o cereb infrc, not ntrct, w stat migr | A | Accepted |
| G43509 | Perst migrn aura w/o cereb infrc, not ntrct, w/o stat migr | A | Accepted |
| G43511 | Perst migraine aura w/o cerebral infrc, ntrct, w stat migr | A | Accepted |
| G43519 | Perst migraine aura w/o cerebral infrc, ntrct, w/o stat migr | A | Accepted |
| G43601 | Perst migraine aura w cerebral infrc, not ntrct, w stat migr | A | Accepted |
| G43609 | Perst migraine aura w cereb infrc, not ntrct, w/o stat migr | A | Accepted |
| G43611 | Perst migraine aura w cerebral infrc, ntrct, w stat migr | A | Accepted |
| G43619 | Perst migraine aura w cerebral infrc, ntrct, w/o stat migr | A | Accepted |
| G43701 | Chronic migraine w/o aura, not intractable, w stat migr | A | Accepted |
| G43709 | Chronic migraine w/o aura, not intractable, w/o stat migr | A | Accepted |
| G43711 | Chronic migraine w/o aura, intractable, w status migrainosus | A | Accepted |
| G43719 | Chronic migraine w/o aura, intractable, w/o stat migr | A | Accepted |
| G43801 | Other migraine, not intractable, with status migrainosus | A | Accepted |
| G43809 | Other migraine, not intractable, without status migrainosus | A | Accepted |
| G43811 | Other migraine, intractable, with status migrainosus | A | Accepted |
| G43819 | Other migraine, intractable, without status migrainosus | A | Accepted |
| G43821 | Menstrual migraine, not intractable, with status migrainosus | A | Accepted |
| G43829 | Menstrual migraine, not intractable, w/o status migrainosus | A | Accepted |
| G43831 | Menstrual migraine, intractable, with status migrainosus | A | Accepted |
| G43839 | Menstrual migraine, intractable, without status migrainosus | A | Accepted |
| G43901 | Migraine, unsp, not intractable, with status migrainosus | A | Accepted |
| G43909 | Migraine, unsp, not intractable, without status migrainosus | A | Accepted |
| G43911 | Migraine, unspecified, intractable, with status migrainosus | A | Accepted |
| G43919 | Migraine, unsp, intractable, without status migrainosus | A | Accepted |
| G43A0 | Cyclical vomiting, in migraine, not intractable | A | Accepted |
| G43A1 | Cyclical vomiting, in migraine, intractable | A | Accepted |
| G43B0 | Ophthalmoplegic migraine, not intractable | A | Accepted |
| G43B1 | Ophthalmoplegic migraine, intractable | A | Accepted |
| G43C0 | Periodic headache syndromes in chld/adlt, not intractable | A | Accepted |
| G43C1 | Periodic headache syndromes in child or adult, intractable | A | Accepted |
| G43D0 | Abdominal migraine, not intractable | A | Accepted |
| G43D1 | Abdominal migraine, intractable | A | Accepted |
| G43E01 | Chronic migraine with aura, not intractable, with stat migr | A | Accepted |
| G43E09 | Chronic migraine with aura, not ntrct, without stat migr | A | Accepted |
| G43E11 | Chronic migraine with aura, intractable, with stat migr | A | Accepted |
| G43E19 | Chronic migraine with aura, intractable, without stat migr | A | Accepted |
| G44001 | Cluster headache syndrome, unspecified, intractable | A | Accepted |
| G44009 | Cluster headache syndrome, unspecified, not intractable | A | Accepted |
| G44011 | Episodic cluster headache, intractable | A | Accepted |
| G44019 | Episodic cluster headache, not intractable | A | Accepted |
| G44021 | Chronic cluster headache, intractable | A | Accepted |
| G44029 | Chronic cluster headache, not intractable | A | Accepted |
| G44031 | Episodic paroxysmal hemicrania, intractable | A | Accepted |
| G44039 | Episodic paroxysmal hemicrania, not intractable | A | Accepted |
| G44041 | Chronic paroxysmal hemicrania, intractable | A | Accepted |
| G44049 | Chronic paroxysmal hemicrania, not intractable | A | Accepted |
| G44051 | Shrt lst unil nerlgif hdache w cnjnct inject/tear, ntrct | A | Accepted |
| G44059 | Shrt lst unil nerlgif hdache w cnjnct inject/tear, not ntrct | A | Accepted |
| G44091 | Other trigeminal autonomic cephalgias (TAC), intractable | A | Accepted |
| G44099 | Other trigeminal autonomic cephalgias (TAC), not intractable | A | Accepted |
| G441 | Vascular headache, not elsewhere classified | A | Accepted |
| G44201 | Tension-type headache, unspecified, intractable | A | Accepted |
| G44209 | Tension-type headache, unspecified, not intractable | A | Accepted |
| G44211 | Episodic tension-type headache, intractable | A | Accepted |
| G44219 | Episodic tension-type headache, not intractable | A | Accepted |
| G44221 | Chronic tension-type headache, intractable | A | Accepted |
| G44229 | Chronic tension-type headache, not intractable | A | Accepted |
| G44301 | Post-traumatic headache, unspecified, intractable | A | Accepted |
| G44309 | Post-traumatic headache, unspecified, not intractable | A | Accepted |
| G44311 | Acute post-traumatic headache, intractable | A | Accepted |
| G44319 | Acute post-traumatic headache, not intractable | A | Accepted |
| G44321 | Chronic post-traumatic headache, intractable | A | Accepted |
| G44329 | Chronic post-traumatic headache, not intractable | A | Accepted |
| G4440 | Drug-induced headache, NEC, not intractable | A | Accepted |
| G4441 | Drug-induced headache, not elsewhere classified, intractable | A | Accepted |
| G4451 | Hemicrania continua | A | Accepted |
| G4452 | New daily persistent headache (NDPH) | A | Accepted |
| G4453 | Primary thunderclap headache | A | Accepted |
| G4459 | Other complicated headache syndrome | A | Accepted |
| G4481 | Hypnic headache | A | Accepted |
| G4482 | Headache associated with sexual activity | A | Accepted |
| G4483 | Primary cough headache | A | Accepted |
| G4484 | Primary exertional headache | A | Accepted |
| G4485 | Primary stabbing headache | A | Accepted |
| G4486 | Cervicogenic headache | E | Accepted |
| G4489 | Other headache syndrome | A | Accepted |
| G450 | Vertebro-basilar artery syndrome | B | Accepted |
| G451 | Carotid artery syndrome (hemispheric) | B | Accepted |
| G452 | Multiple and bilateral precerebral artery syndromes | B | Accepted |
| G453 | Amaurosis fugax | B | Accepted |
| G454 | Transient global amnesia | B | Accepted |
| G458 | Oth transient cerebral ischemic attacks and related synd | B | Accepted |
| G459 | Transient cerebral ischemic attack, unspecified | B | Accepted |
| G460 | Middle cerebral artery syndrome | None | Cannot group |
| G461 | Anterior cerebral artery syndrome | None | Cannot group |
| G462 | Posterior cerebral artery syndrome | None | Cannot group |
| G463 | Brain stem stroke syndrome | None | Cannot group |
| G464 | Cerebellar stroke syndrome | None | Cannot group |
| G465 | Pure motor lacunar syndrome | None | Cannot group |
| G466 | Pure sensory lacunar syndrome | None | Cannot group |
| G467 | Other lacunar syndromes | None | Cannot group |
| G468 | Oth vascular syndromes of brain in cerebrovascular diseases | None | Cannot group |
| G4700 | Insomnia, unspecified | A | Accepted |
| G4701 | Insomnia due to medical condition | A | Accepted |
| G4709 | Other insomnia | A | Accepted |
| G4710 | Hypersomnia, unspecified | A | Accepted |
| G4711 | Idiopathic hypersomnia with long sleep time | A | Accepted |
| G4712 | Idiopathic hypersomnia without long sleep time | A | Accepted |
| G4713 | Recurrent hypersomnia | A | Accepted |
| G4714 | Hypersomnia due to medical condition | A | Accepted |
| G4719 | Other hypersomnia | A | Accepted |
| G4720 | Circadian rhythm sleep disorder, unspecified type | A | Accepted |
| G4721 | Circadian rhythm sleep disorder, delayed sleep phase type | A | Accepted |
| G4722 | Circadian rhythm sleep disorder, advanced sleep phase type | A | Accepted |
| G4723 | Circadian rhythm sleep disorder, irregular sleep wake type | A | Accepted |
| G4724 | Circadian rhythm sleep disorder, free running type | A | Accepted |
| G4725 | Circadian rhythm sleep disorder, jet lag type | A | Accepted |
| G4726 | Circadian rhythm sleep disorder, shift work type | A | Accepted |
| G4727 | Circadian rhythm sleep disorder in conditions classd elswhr | None | Cannot group |
| G4729 | Other circadian rhythm sleep disorder | A | Accepted |
| G4730 | Sleep apnea, unspecified | A | Accepted |
| G4731 | Primary central sleep apnea | A | Accepted |
| G4732 | High altitude periodic breathing | A | Accepted |
| G4733 | Obstructive sleep apnea (adult) (pediatric) | A | Accepted |
| G4734 | Idio sleep related nonobstructive alveolar hypoventilation | A | Accepted |
| G4735 | Congenital central alveolar hypoventilation syndrome | A | Accepted |
| G4736 | Sleep related hypoventilation in conditions classd elswhr | None | Cannot group |
| G4737 | Central sleep apnea in conditions classified elsewhere | None | Cannot group |
| G4739 | Other sleep apnea | A | Accepted |
| G47411 | Narcolepsy with cataplexy | A | Accepted |
| G47419 | Narcolepsy without cataplexy | A | Accepted |
| G47421 | Narcolepsy in conditions classified elsewhere with cataplexy | None | Cannot group |
| G47429 | Narcolepsy in conditions classified elsewhere w/o cataplexy | None | Cannot group |
| G4750 | Parasomnia, unspecified | A | Accepted |
| G4751 | Confusional arousals | A | Accepted |
| G4752 | REM sleep behavior disorder | A | Accepted |
| G4753 | Recurrent isolated sleep paralysis | A | Accepted |
| G4754 | Parasomnia in conditions classified elsewhere | None | Cannot group |
| G4759 | Other parasomnia | A | Accepted |
| G4761 | Periodic limb movement disorder | A | Accepted |
| G4762 | Sleep related leg cramps | A | Accepted |
| G4763 | Sleep related bruxism | A | Accepted |
| G4769 | Other sleep related movement disorders | A | Accepted |
| G478 | Other sleep disorders | A | Accepted |
| G479 | Sleep disorder, unspecified | A | Accepted |
Source: CMS HH PPS Grouper Software v07.1.26, effective 2026-04-01. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.
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