G40 Epilepsy and recurrent seizures

⚠ Non-Billable ICD-10-CM 2026
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The ICD-10-CM code for Epilepsy and recurrent seizures is G40 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Section
G40-G47: Episodic and paroxysmal disorders (G40-G47)
Category G40
94 codes (58 billable)
FY2026 Status
Stable since FY2024
Excludes1
Not coded here. These conditions should NOT be coded together with G40.
  • conversion disorder with seizures (F44.5)
  • convulsions NOS (R56.9)
  • post traumatic seizures (R56.1)
  • seizure (convulsive) NOS (R56.9)
  • seizure of newborn (P90)
Excludes2
Not included here. These conditions are coded elsewhere but may be coded together if applicable.
  • hippocampal sclerosis (G93.81)
  • mesial temporal sclerosis (G93.81)
  • temporal sclerosis (G93.81)
  • Todd's paralysis (G83.84)

Notes

  • the following terms are to be considered equivalent to intractable: pharmacoresistant (pharmacologically resistant), treatment resistant, refractory (medically) and poorly controlled

Official Coding Guidelines

Dominant/nondominant side (TOC entry)

a. Dominant/nondominant side ................................................................................................. 45

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.6.a
Pain - Category G89 (TOC entry)

b. Pain - Category G89.............................................................................................................. 45

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.6.b

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Cite This Page

Reference G40 with the canonical source and edition:

G40 — Epilepsy and recurrent seizures. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/G40

Canonical URL: https://icd10codingpro.com/codes/G40

Related Codes

All Codes in G40

Every most-specific code under G40 Epilepsy and recurrent seizures (58 codes):

Show the complete G40 code list
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 G40.011 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 G40.101 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 G40.111 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 G40.201 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 G40.211 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 G40.301 Generalized idiopathic epilepsy and epileptic syndromes, not intractable, with status epilepticus G40.309 Generalized idiopathic epilepsy and epileptic syndromes, not intractable, without status epilepticus G40.311 Generalized idiopathic epilepsy and epileptic syndromes, intractable, with status epilepticus G40.319 Generalized idiopathic epilepsy and epileptic syndromes, intractable, without status epilepticus 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 G40.411 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 G40.501 Epileptic seizures related to external causes, not intractable, with status epilepticus G40.509 Epileptic seizures related to external causes, not intractable, without status epilepticus G40.801 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 G40.811 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 G40.821 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 G40.833 Dravet syndrome, intractable, with status epilepticus G40.834 Dravet syndrome, intractable, without status epilepticus G40.841 KCNQ2-related epilepsy, not intractable, with status epilepticus G40.842 KCNQ2-related epilepsy, not intractable, without status epilepticus G40.843 KCNQ2-related epilepsy, intractable, with status epilepticus G40.844 KCNQ2-related epilepsy, intractable, without status epilepticus G40.89 Other seizures G40.901 Epilepsy, unspecified, not intractable, with status epilepticus G40.909 Epilepsy, unspecified, not intractable, without status epilepticus G40.911 Epilepsy, unspecified, intractable, with status epilepticus G40.919 Epilepsy, unspecified, intractable, without status epilepticus G40.A01 Absence epileptic syndrome, not intractable, with status epilepticus G40.A09 Absence epileptic syndrome, not intractable, without status epilepticus G40.A11 Absence epileptic syndrome, intractable, with status epilepticus G40.A19 Absence epileptic syndrome, intractable, without status epilepticus G40.B01 Juvenile myoclonic epilepsy, not intractable, with status epilepticus G40.B09 Juvenile myoclonic epilepsy, not intractable, without status epilepticus G40.B11 Juvenile myoclonic epilepsy, intractable, with status epilepticus G40.B19 Juvenile myoclonic epilepsy, intractable, without status epilepticus G40.C01 Lafora progressive myoclonus epilepsy, not intractable, with status epilepticus G40.C09 Lafora progressive myoclonus epilepsy, not intractable, without status epilepticus G40.C11 Lafora progressive myoclonus epilepsy, intractable, with status epilepticus G40.C19 Lafora progressive myoclonus epilepsy, intractable, without status epilepticus
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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