G40.8

Non-Billable
ChapterG00–G99
Ranksubcategory
Official Description

Other epilepsy and recurrent seizures

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 6: Diseases of the Nervous System (G00-G99).

Instructional Notes

Includes
  • Epilepsies and epileptic syndromes undetermined as to whether they are focal or generalized
  • Landau-Kleffner syndrome
General instructions are available for the parent sections:
View CH6 NotesView G40 Notes

Clinical Hierarchy

CH6Diseases of the nervous system (G00-G99)
G40-G47Episodic and paroxysmal disorders (G40-G47)
G40Epilepsy and recurrent seizures
G40.8Other epilepsy and recurrent seizures
G40.80Other epilepsy
G40.81Lennox-Gastaut syndrome
G40.82Epileptic spasms
G40.83Dravet syndrome
G40.84KCNQ2-related epilepsy
G40.89Other seizures

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to G40.8:

categoryG40
Epilepsy and recurrent seizures
View context instructions
chapterCH6
Diseases of the nervous system (G00-G99)
View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to G40.8. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

25 raw paths
Epilepsy, epileptic, epilepsia (attack) (cerebral) (convulsion) (fit) (seizure)25 unique routes
benign myoclonic in infancy→G40.8
KCNQ2-related→G40.8(7 variants)
intractable→G40.8(3 variants)
with status epilepticus→G40.8
without status epilepticus→G40.8
not intractable→G40.8(3 variants)
with status epilepticus→G40.8
without status epilepticus→G40.8
myoclonus, myoclonic
severe, in infancy (SMEI)→G40.8
polymorphic, in infancy (PMEI)→G40.8
spasms→G40.8(7 variants)
intractable→G40.8(3 variants)
with status epilepticus→G40.8
without status epilepticus→G40.8
not intractable→G40.8(3 variants)
with status epilepticus→G40.8
without status epilepticus→G40.8
specified NEC→G40.8(7 variants)
intractable→G40.8(3 variants)
with status epilepticus→G40.8
without status epilepticus→G40.8
not intractable→G40.8(3 variants)
with status epilepticus→G40.8
without status epilepticus→G40.8
syndromes
specified NEC→G40.8

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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