G40.5
ICD-10Non-billable categoryEpileptic seizures related to external causes
Official ICD-10-CM descriptor (FY2026)
Epileptic seizures related to external causes
G40.5 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Inclusion terms
- 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
Use additional code
Report an additional code to identify the associated condition.
- code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
Code also
Two codes may be needed; sequencing depends on the reason for the encounter.
- , if applicable, associated epilepsy and recurrent seizures (G40.-)
ICD-10-CM FY2026 defines 1 code beneath G40.5. See the ICD-10-CM index for what this site publishes.
Related codes in G40
- G40.0Local-rel (focal) idio epilepsy w seizures of loc onsetcategory
- G40.1Local-rel (focal) symptc epilepsy w simple partial seizurescategory
- G40.2Local-rel (focal) symptc epilepsy w complex partial seizurescategory
- G40.3Generalized idiopathic epilepsy and epileptic syndromescategory
- G40.AAbsence epileptic syndromecategory
- G40.BJuvenile myoclonic epilepsy [impulsive petit mal]category
- G40.CLafora progressive myoclonus epilepsycategory
- G40.4Other generalized epilepsy and epileptic syndromescategory
- G40.8Other epilepsy and recurrent seizurescategory
- G40.9Epilepsy, unspecifiedcategory
Where this code sits
- Parent code
- G40
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.