G40.5: Epileptic seizures related to external causes
G40.5 is a non-billable header ICD-10-CM code for epileptic seizures related to external causes. It cannot be billed on its own: choose one of the more specific child codes below.
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Add a secondary code to capture the detail described below.
Code also
Both codes may be needed to describe the encounter fully. Sequencing depends on the reason for the visit.
- , if applicable, associated epilepsy and recurrent seizures (G40.-)
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Epileptic seizures related to alcohol
- Epileptic seizures related to drugs
- Epileptic seizures related to hormonal changes
- Epileptic seizures related to sleep deprivation
- Epileptic seizures related to stress
Excludes1 inherited from the categories above G40.5
A category’s note binds every code beneath it.
Excludes2 inherited from the categories above G40.5
Not part of this code, but both may be coded when both are present.
Other codes that can never be billed with G40.5
Their own Excludes1 notes name this code, so the conflict is not listed above.
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Code history
Unchanged in every release from FY2024 to FY2027.
Code to one of these instead G40.5
1 child code. Green means billable.
Other codes under G40
- G40.0Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset
- G40.1Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures
- G40.2Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures
- G40.3Generalized idiopathic epilepsy and epileptic syndromes
- G40.AAbsence epileptic syndrome
- G40.BJuvenile myoclonic epilepsy [impulsive petit mal]
- G40.CLafora progressive myoclonus epilepsy
- G40.4Other generalized epilepsy and epileptic syndromes
- G40.8Other epilepsy and recurrent seizures
- G40.9Epilepsy, unspecified