ICD-10-CM › G00-G99 › G40-G47 › G40.81 Lennox-Gastaut syndrome › G40.814

G40.814

Lennox-Gastaut syndrome, intractable, without status epilepticus

ValidICD-10-CM diagnosis code.

Valid for claims with a date of service in the current code year.

Valid FY2016 onwards.

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 Lennox-Gastaut syndrome, intractable, without status epilepticus

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.

Inherited from G40 Epilepsy and recurrent seizures

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.

Codes in the same group

CodeDescriptionStatus
G40.811 Lennox-Gastaut syndrome, not intractable, with status epilepticus Valid
G40.812 Lennox-Gastaut syndrome, not intractable, without status epilepticus Valid
G40.813 Lennox-Gastaut syndrome, intractable, with status epilepticus Valid