T42.6X6DBillable
Underdosing of other antiepileptic and sedative-hypnotic drugs, subsequent encounter
Short description: Underdosing of antiepileptic and sed-hypntc drugs, subs
- Chapter
- 19. Injury, poisoning and certain other consequences of external causes
- Category
- T42
- Effective date
- October 1, 2026
Related codes in category T42
T42Antiepileptic, sedative- hypnotic and antiparkinsonism drugsT42.0Hydantoin derivativesT42.0XHydantoin derivativesT42.0X1Poisoning by hydantoin derivatives, accidentalT42.0X1APoisoning by hydantoin derivatives, accidental, initYesT42.0X1DPoisoning by hydantoin derivatives, accidental, subsYesT42.0X1SPoisoning by hydantoin derivatives, accidental, sequelaYesT42.0X2Poisoning by hydantoin derivatives, intentional self-harmT42.0X2APoisoning by hydantoin derivatives, self-harm, initYesT42.0X2DPoisoning by hydantoin derivatives, self-harm, subsYesT42.0X2SPoisoning by hydantoin derivatives, self-harm, sequelaYesT42.0X3Poisoning by hydantoin derivatives, assault
Frequently asked questions
What is ICD-10 code T42.6X6D?
T42.6X6D is an ICD-10-CM diagnosis code for Underdosing of other antiepileptic and sedative-hypnotic drugs, subsequent encounter.
Is T42.6X6D a billable code?
Yes. T42.6X6D is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is T42.6X6D in?
T42.6X6D falls under Chapter 19: Injury, poisoning and certain other consequences of external causes.
When did T42.6X6D become effective?
T42.6X6D has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to T42.6X6D?
T42.6X6D belongs to category T42, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.