AutoICD API

G40.9

Non-billable

Epilepsy, unspecified

Epilepsy, unspecified

This is a header/category code. For billing purposes, use a more specific child code from the list below.

Status

Non-billable / Header

Block

G40-G47

Parent Code

G40

Child Codes

2

ICD-11 Mapping

1 equivalent

Coding Notes

Excludes 1

Codes that cannot be used together with this code (mutual exclusion)

Excludes 2

Conditions not included here, but the patient may have both

Child Codes (2)

G40.90

Epilepsy, unspecified, not intractable

G40.91

Epilepsy, unspecified, intractable

Related Codes(10)
G40.0

Local-rel (focal) idio epilepsy w seizures of loc onset

G40.1

Local-rel (focal) symptc epilepsy w simple partial seizures

G40.2

Local-rel (focal) symptc epilepsy w complex partial seizures

G40.3

Generalized idiopathic epilepsy and epileptic syndromes

G40.4

Other generalized epilepsy and epileptic syndromes

G40.5

Epileptic seizures related to external causes

G40.8

Other epilepsy and recurrent seizures

G40.A

Absence epileptic syndrome

G40.B

Juvenile myoclonic epilepsy [impulsive petit mal]

G40.C

Lafora progressive myoclonus epilepsy

ICD-11 Equivalents(1)

ICD-11 Equivalents

View full mapping

Corresponding ICD-11 codes from the WHO crosswalk mapping

8A6ZEpilepsy or seizures, unspecifiedequivalentPrimary
Also Known As / Clinical Terms(41)

UMLS

Frequently Asked Questions
What is the ICD-10 code for epilepsy, unspecified?

The ICD-10-CM code for epilepsy, unspecified is G40.9. The full clinical description is "Epilepsy, unspecified". G40.9 is a non-billable header code. Use a more specific child code for billing purposes.

What does ICD-10 code G40.9 mean?

ICD-10-CM code G40.9 represents “Epilepsy, unspecified”. It is classified under Chapter 6: Diseases of the Nervous System and is a non-billable header code. Use a more specific child code for billing purposes.

Is G40.9 a billable code?

No, G40.9 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 2 child codes under G40.9.

What chapter is G40.9 in?

G40.9 is in Chapter 6: Diseases of the Nervous System (codes G00-G99).

What codes cannot be used with G40.9?

G40.9 has Excludes1 notes indicating codes that cannot be used together with it, including: conversion disorder with seizures (F44.5); convulsions NOS (R56.9); post traumatic seizures (R56.1); and 2 more.

What are the subcategories under G40.9?

G40.9 has 2 child codes, including: G40.90 (Epilepsy, unspecified, not intractable), G40.91 (Epilepsy, unspecified, intractable).

What are the UMLS CUIs for G40.9?

G40.9 is linked to 1 UMLS Concept Unique Identifier: C0014544. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.

How does G40.9 relate to ICF functioning codes?

ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like epilepsy, unspecified affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.

What is the ICD-11 equivalent of G40.9?

G40.9 maps to the ICD-11 code: 8A6Z (Epilepsy or seizures, unspecified).

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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.