ICD-10-CM › G00-G99 › G40-G47 › G codes › G40

G40

Epilepsy and recurrent seizures

Not billableICD-10-CM diagnosis code.

This code exists but cannot be submitted on its own. It groups the more specific codes beneath it.

A category header for its whole life, FY2016 onwards. It has never been valid for submission on its own.

Submit one of these 11 more specific codes instead:

  • G40.0 Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset (also a header)
  • G40.1 Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures (also a header)
  • G40.2 Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures (also a header)
  • G40.3 Generalized idiopathic epilepsy and epileptic syndromes (also a header)
  • G40.4 Other generalized epilepsy and epileptic syndromes (also a header)
  • G40.5 Epileptic seizures related to external causes (also a header)
  • G40.8 Other epilepsy and recurrent seizures (also a header)
  • G40.9 Epilepsy, unspecified (also a header)
  • G40.A Absence epileptic syndrome (also a header)
  • G40.B Juvenile myoclonic epilepsy [impulsive petit mal] (also a header)
  • G40.C Lafora progressive myoclonus epilepsy (also a header)

What has happened to this code

Every change the publisher made, from 2012 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.

  1. FY2012 Added to the draft code set draft Epilepsy and recurrent seizures

Official coding rules

Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.

This code

Excludes1 - never coded here

  • 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

  • hippocampal sclerosis (G93.81)
  • mesial temporal sclerosis (G93.81)
  • temporal sclerosis (G93.81)
  • Todd's paralysis (G83.84)

Note

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

How CDC's index refers to this code

Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.