T42.6
ICD-10Non-billable categoryAntiepileptic and sedative-hypnotic drugs
Official ICD-10-CM descriptor (FY2026)
Poisoning by, adverse effect of and underdosing of other antiepileptic and sedative-hypnotic drugs
T42.6 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
- Poisoning by, adverse effect of and underdosing of methaqualone
- Poisoning by, adverse effect of and underdosing of valproic acid
Excludes1
Not coded here. An Excludes1 code should never be reported at the same time as the code above it.
- poisoning by, adverse effect of and underdosing of carbamazepine (T42.1-)
ICD-10-CM FY2026 defines 1 code beneath T42.6. See the ICD-10-CM index for what this site publishes.
Related codes in T42
- T42.0Hydantoin derivativescategory
- T42.1Iminostilbenescategory
- T42.2Succinimides and oxazolidinedionescategory
- T42.3Barbituratescategory
- T42.4Benzodiazepinescategory
- T42.5Mixed antiepilepticscategory
- T42.7Unsp antiepileptic and sedative-hypnotic drugscategory
- T42.8Antiparkns drug/centr muscle-tone depressantscategory
Where this code sits
- Parent code
- T42
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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.