ICD-10 · PDGM grouping
G40 Epilepsy and recurrent seizures
All 58 codes in the G40 family, with the PDGM clinical group, comorbidity subgroup and primary-position rule CMS assigns, read from the CMS grouper crosswalk v07.2.26 and the CDC FY2027 code file.
ICD-10-CM FY2027 · CMS grouper v07.2.26
Codes in family
58
Can lead a claim
58
Cannot lead a claim
0
What CMS assigns to G40
All 58 codes group to MMTA - Other (57) and Neuro Rehabilitation (1). 45 of the 58 count toward the Epilepsy comorbidity subgroup; 13 are assigned none. Every code can lead a claim.
- Epilepsy: counts toward the high comorbidity tier only in an interaction pair.
Every code in G40
Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.
| Code | Description | Primary position | Clinical group | Comorbidity subgroup |
|---|---|---|---|---|
| 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 epilepticusCMS: Local-rel idio epi w seiz of loc onst, not ntrct, w stat epi | Can lead a claim | A | None |
| G40.009 | Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, not intractable, without status epilepticusCMS: Local-rel idio epi w seiz of loc onst,not ntrct,w/o stat epi | Can lead a claim | A | None |
| 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 epilepticusCMS: Local-rel idio epi w seiz of loc onset, ntrct, w stat epi | Can lead a claim | A | None |
| G40.019 | Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, intractable, without status epilepticusCMS: Local-rel idio epi w seiz of loc onset, ntrct, w/o stat epi | Can lead a claim | A | None |
| 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 epilepticusCMS: Local-rel symptc epi w simp part seiz, not ntrct, w stat epi | Can lead a claim | A | Epilepsy |
| G40.109 | Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, not intractable, without status epilepticusCMS: Local-rel symptc epi w simp prt seiz,not ntrct, w/o stat epi | Can lead a claim | A | Epilepsy |
| 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 epilepticusCMS: Local-rel symptc epi w simple part seiz, ntrct, w stat epi | Can lead a claim | A | Epilepsy |
| G40.119 | Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable, without status epilepticusCMS: Local-rel symptc epi w simple part seiz, ntrct, w/o stat epi | Can lead a claim | A | Epilepsy |
| 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 epilepticusCMS: Local-rel symptc epi w cmplx prt seiz, not ntrct, w stat epi | Can lead a claim | A | None |
| G40.209 | Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractable, without status epilepticusCMS: Local-rel symptc epi w cmplx prt seiz,not ntrct,w/o stat epi | Can lead a claim | A | None |
| 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 epilepticusCMS: Local-rel symptc epi w cmplx partial seiz, ntrct, w stat epi | Can lead a claim | A | None |
| G40.219 | Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractable, without status epilepticusCMS: Local-rel symptc epi w cmplx part seiz, ntrct, w/o stat epi | Can lead a claim | A | None |
| 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 epilepticusCMS: Gen idiopathic epilepsy, not intractable, w stat epi | Can lead a claim | A | None |
| G40.309 | Generalized idiopathic epilepsy and epileptic syndromes, not intractable, without status epilepticusCMS: Gen idiopathic epilepsy, not intractable, w/o stat epi | Can lead a claim | A | Epilepsy |
| G40.31 Generalized idiopathic epilepsy and epileptic syndromes, intractable | ||||
| G40.311 | Generalized idiopathic epilepsy and epileptic syndromes, intractable, with status epilepticusCMS: Generalized idiopathic epilepsy, intractable, w stat epi | Can lead a claim | A | Epilepsy |
| G40.319 | Generalized idiopathic epilepsy and epileptic syndromes, intractable, without status epilepticusCMS: Generalized idiopathic epilepsy, intractable, w/o stat epi | Can lead a claim | A | Epilepsy |
| G40.A Absence epileptic syndrome | ||||
| G40.A0 Absence epileptic syndrome, not intractable | ||||
| G40.A01 | Absence epileptic syndrome, not intractable, with status epilepticusCMS: Absence epileptic syndrome, not intractable, w stat epi | Can lead a claim | A | Epilepsy |
| G40.A09 | Absence epileptic syndrome, not intractable, without status epilepticusCMS: Absence epileptic syndrome, not intractable, w/o stat epi | Can lead a claim | A | Epilepsy |
| G40.A1 Absence epileptic syndrome, intractable | ||||
| G40.A11 | Absence epileptic syndrome, intractable, with status epilepticusCMS: Absence epileptic syndrome, intractable, w stat epi | Can lead a claim | A | Epilepsy |
| G40.A19 | Absence epileptic syndrome, intractable, without status epilepticusCMS: Absence epileptic syndrome, intractable, w/o stat epi | Can lead a claim | A | Epilepsy |
| G40.B Juvenile myoclonic epilepsy [impulsive petit mal] | ||||
| G40.B0 Juvenile myoclonic epilepsy, not intractable | ||||
| G40.B01 | Juvenile myoclonic epilepsy, not intractable, with status epilepticusCMS: Juvenile myoclonic epilepsy, not intractable, w stat epi | Can lead a claim | A | Epilepsy |
| G40.B09 | Juvenile myoclonic epilepsy, not intractable, without status epilepticusCMS: Juvenile myoclonic epilepsy, not intractable, w/o stat epi | Can lead a claim | A | Epilepsy |
| G40.B1 Juvenile myoclonic epilepsy, intractable | ||||
| G40.B11 | Juvenile myoclonic epilepsy, intractable, with status epilepticusCMS: Juvenile myoclonic epilepsy, intractable, w stat epi | Can lead a claim | A | Epilepsy |
| G40.B19 | Juvenile myoclonic epilepsy, intractable, without status epilepticusCMS: Juvenile myoclonic epilepsy, intractable, w/o stat epi | Can lead a claim | A | Epilepsy |
| G40.C Lafora progressive myoclonus epilepsy | ||||
| G40.C0 Lafora progressive myoclonus epilepsy, not intractable | ||||
| G40.C01 | Lafora progressive myoclonus epilepsy, not intractable, with status epilepticusCMS: Lafora progr myoclonus epilepsy, not ntrct, with stat epi | Can lead a claim | A | Epilepsy |
| G40.C09 | Lafora progressive myoclonus epilepsy, not intractable, without status epilepticusCMS: Lafora progr myoclonus epilepsy, not ntrct, without stat epi | Can lead a claim | A | Epilepsy |
| G40.C1 Lafora progressive myoclonus epilepsy, intractable | ||||
| G40.C11 | Lafora progressive myoclonus epilepsy, intractable, with status epilepticusCMS: Lafora progressive myoclonus epilepsy, ntrct, with stat epi | Can lead a claim | A | Epilepsy |
| G40.C19 | Lafora progressive myoclonus epilepsy, intractable, without status epilepticusCMS: Lafora progr myoclonus epilepsy, ntrct, without stat epi | Can lead a claim | A | Epilepsy |
| 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 epilepticusCMS: Oth generalized epilepsy, not intractable, w stat epi | Can lead a claim | A | Epilepsy |
| G40.409 | Other generalized epilepsy and epileptic syndromes, not intractable, without status epilepticusCMS: Oth generalized epilepsy, not intractable, w/o stat epi | Can lead a claim | A | Epilepsy |
| G40.41 Other generalized epilepsy and epileptic syndromes, intractable | ||||
| G40.411 | Other generalized epilepsy and epileptic syndromes, intractable, with status epilepticusCMS: Oth generalized epilepsy, intractable, w status epilepticus | Can lead a claim | A | Epilepsy |
| G40.419 | Other generalized epilepsy and epileptic syndromes, intractable, without status epilepticusCMS: Oth generalized epilepsy, intractable, w/o stat epi | Can lead a claim | A | Epilepsy |
| G40.42 | Cyclin-Dependent Kinase-Like 5 Deficiency Disorder | Can lead a claim | B | Epilepsy |
| 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 epilepticusCMS: Epileptic seiz rel to extrn causes, not ntrct, w stat epi | Can lead a claim | A | Epilepsy |
| G40.509 | Epileptic seizures related to external causes, not intractable, without status epilepticusCMS: Epileptic seiz rel to extrn causes, not ntrct, w/o stat epi | Can lead a claim | A | Epilepsy |
| G40.8 Other epilepsy and recurrent seizures | ||||
| G40.80 Other epilepsy | ||||
| G40.801 | Other epilepsy, not intractable, with status epilepticus | Can lead a claim | A | Epilepsy |
| G40.802 | Other epilepsy, not intractable, without status epilepticus | Can lead a claim | A | Epilepsy |
| G40.803 | Other epilepsy, intractable, with status epilepticus | Can lead a claim | A | Epilepsy |
| G40.804 | Other epilepsy, intractable, without status epilepticus | Can lead a claim | A | Epilepsy |
| G40.81 Lennox-Gastaut syndrome | ||||
| G40.811 | Lennox-Gastaut syndrome, not intractable, with status epilepticusCMS: Lennox-Gastaut syndrome, not intractable, w stat epi | Can lead a claim | A | Epilepsy |
| G40.812 | Lennox-Gastaut syndrome, not intractable, without status epilepticusCMS: Lennox-Gastaut syndrome, not intractable, w/o stat epi | Can lead a claim | A | Epilepsy |
| G40.813 | Lennox-Gastaut syndrome, intractable, with status epilepticusCMS: Lennox-Gastaut syndrome, intractable, w status epilepticus | Can lead a claim | A | Epilepsy |
| G40.814 | Lennox-Gastaut syndrome, intractable, without status epilepticusCMS: Lennox-Gastaut syndrome, intractable, w/o status epilepticus | Can lead a claim | A | Epilepsy |
| G40.82 Epileptic spasms | ||||
| G40.821 | Epileptic spasms, not intractable, with status epilepticus | Can lead a claim | A | None |
| G40.822 | Epileptic spasms, not intractable, without status epilepticusCMS: Epileptic spasms, not intractable, w/o status epilepticus | Can lead a claim | A | None |
| G40.823 | Epileptic spasms, intractable, with status epilepticus | Can lead a claim | A | None |
| G40.824 | Epileptic spasms, intractable, without status epilepticus | Can lead a claim | A | None |
| G40.83 Dravet syndrome | ||||
| G40.833 | Dravet syndrome, intractable, with status epilepticus | Can lead a claim | A | Epilepsy |
| G40.834 | Dravet syndrome, intractable, without status epilepticus | Can lead a claim | A | Epilepsy |
| G40.84 KCNQ2-related epilepsy | ||||
| G40.841 | KCNQ2-related epilepsy, not intractable, with status epilepticusCMS: KCNQ2-related epilepsy, not intractable, with stat epi | Can lead a claim | A | Epilepsy |
| G40.842 | KCNQ2-related epilepsy, not intractable, without status epilepticusCMS: KCNQ2-related epilepsy, not intractable, without stat epi | Can lead a claim | A | Epilepsy |
| G40.843 | KCNQ2-related epilepsy, intractable, with status epilepticus | Can lead a claim | A | Epilepsy |
| G40.844 | KCNQ2-related epilepsy, intractable, without status epilepticusCMS: KCNQ2-related epilepsy, intractable, without stat epi | Can lead a claim | A | Epilepsy |
| G40.89 | Other seizures | Can lead a claim | A | Epilepsy |
| G40.9 Epilepsy, unspecified | ||||
| G40.90 Epilepsy, unspecified, not intractable | ||||
| G40.901 | Epilepsy, unspecified, not intractable, with status epilepticusCMS: Epilepsy, unsp, not intractable, with status epilepticus | Can lead a claim | A | Epilepsy |
| G40.909 | Epilepsy, unspecified, not intractable, without status epilepticusCMS: Epilepsy, unsp, not intractable, without status epilepticus | Can lead a claim | A | Epilepsy |
| G40.91 Epilepsy, unspecified, intractable | ||||
| G40.911 | Epilepsy, unspecified, intractable, with status epilepticus | Can lead a claim | A | Epilepsy |
| G40.919 | Epilepsy, unspecified, intractable, without status epilepticusCMS: Epilepsy, unsp, intractable, without status epilepticus | Can lead a claim | A | Epilepsy |
Sources: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01, for the clinical group, comorbidity subgroup, code-first conventions and primary-position flags; CDC NCHS ICD-10-CM FY2027 code descriptions for the family title and code wording. 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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