All ICD10 Codes

G40

Non-Billable
ChapterG00–G99
Rankcategory
Official Description

Epilepsy and recurrent seizures

Use a more specific code (0 billable, 11 non-billable)
G40.0Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onsethas subcodesG40.1Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizureshas subcodesG40.2Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizureshas subcodesG40.3Generalized idiopathic epilepsy and epileptic syndromeshas subcodesG40.4Other generalized epilepsy and epileptic syndromeshas subcodesG40.5Epileptic seizures related to external causeshas subcodesG40.8Other epilepsy and recurrent seizureshas subcodesG40.9Epilepsy, unspecifiedhas subcodesG40.AAbsence epileptic syndromehas subcodesG40.BJuvenile myoclonic epilepsy [impulsive petit mal]has subcodesG40.CLafora progressive myoclonus epilepsyhas subcodes
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 6: Diseases of the Nervous System (G00-G99).

CH6 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Instructional Notes

Excludes1(Not coded here. Use a different code.)
  • 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. Code separately if applicable.)

Clinical Hierarchy

BillableHas subcodes
CH6Diseases of the nervous system (G00-G99)
G40-G47Episodic and paroxysmal disorders (G40-G47)
G40Epilepsy and recurrent seizuresNot billable
G40.0Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onsetSubcodes
G40.1Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizuresSubcodes
G40.2Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizuresSubcodes
G40.3Generalized idiopathic epilepsy and epileptic syndromesSubcodes
G40.4Other generalized epilepsy and epileptic syndromesSubcodes
G40.5Epileptic seizures related to external causesSubcodes
G40.8Other epilepsy and recurrent seizuresSubcodes
G40.9Epilepsy, unspecifiedSubcodes
G40.AAbsence epileptic syndromeSubcodes
G40.BJuvenile myoclonic epilepsy [impulsive petit mal]Subcodes
G40.CLafora progressive myoclonus epilepsySubcodes

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to G40:

chapterCH6
Diseases of the nervous system (G00-G99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

Find Procedures (ICD-10-PCS)

Find surgical and procedural codes related to Epilepsy and recurrent seizures.

Search PCS Codes