ICD-10-CM > S00-T88 > T36-T50 > T42 > T42.0 T42.0 Poisoning by, adverse effect of and underdosing of hydantoin derivatives Non-Billable/Non-Specific Codes T42.0XPoisoning by, adverse effect of and underdosing of hydantoin derivativesT42.0X1Poisoning by hydantoin derivatives, accidental (unintentional)T42.0X1A..., initial encounterT42.0X1D..., subsequent encounterT42.0X1S..., sequelaT42.0X2Poisoning by hydantoin derivatives, intentional self-harmT42.0X2A..., initial encounterT42.0X2D..., subsequent encounterT42.0X2S..., sequelaT42.0X3Poisoning by hydantoin derivatives, assaultT42.0X3A..., initial encounterT42.0X3D..., subsequent encounterT42.0X3S..., sequelaT42.0X4Poisoning by hydantoin derivatives, undeterminedT42.0X4A..., initial encounterT42.0X4D..., subsequent encounterT42.0X4S..., sequelaT42.0X5Adverse effect of hydantoin derivativesT42.0X5A..., initial encounterT42.0X5D..., subsequent encounterT42.0X5S..., sequelaT42.0X6Underdosing of hydantoin derivativesT42.0X6A..., initial encounterT42.0X6D..., subsequent encounterT42.0X6S..., sequela