G40.9
Non-billableEpilepsy, unspecified
Epilepsy, unspecified
This is a header/category code. For billing purposes, use a more specific child code from the list below.
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
- 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)
- hippocampal sclerosis (G93.81)
- mesial temporal sclerosis (G93.81)
- temporal sclerosis (G93.81)
- Todd's paralysis (G83.84)
Child Codes (2)
Also Known As / Clinical Terms
UMLS
- EpilepsiesC0014544
- EpilepsyC0014544
- Epilepsy (disorder)C0014544
- Epilepsy NOSC0014544
- Epilepsy, unspecifiedC0014544
- Epileptic convulsions NOSC0014544
- Epileptic fits NOSC0014544
- Epileptic seizures NOSC0014544
- SEIZURE DISC0014544
- Seizure DisorderC0014544
- Seizure DisordersC0014544
- Seizure disorderC0014544
- Seizure disorder (disorder)C0014544
- Seizure disorder NOSC0014544
- attacks epilepticC0014544
- convulsion epilepticC0014544
- disorder epilepsyC0014544
- disorder seizureC0014544
- disorder seizuresC0014544
- disorders epilepticC0014544
- disorders seizureC0014544
- disorders seizuresC0014544
- epilepsiaC0014544
- epilepsiesC0014544
- epilepsisC0014544
- epilepsyC0014544
- epilepsy typesC0014544
- epilepticC0014544
- epileptic attackC0014544
- epileptic fitC0014544
- epileptic fitsC0014544
- epileptic seizureC0014544
- epileptic seizuresC0014544
- epilepticsC0014544
- seizure disorderC0014544
- seizure disordersC0014544
- seizure epilepticC0014544
- seizure syndromeC0014544
- seizures syndromeC0014544
- seizures syndromesC0014544
- syndrome seizureC0014544
Frequently Asked Questions
What is ICD-10 code G40.9?
ICD-10-CM code G40.9 represents "Epilepsy, unspecified". It 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.
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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.