ICD-10-CM > S00-T88 > T36-T50 > T43 > T43.6 > T43.63 T43.63 Poisoning by, adverse effect of and underdosing of methylphenidate Non-Billable/Non-Specific Codes T43.631Poisoning by methylphenidate, accidental (unintentional)T43.631A..., initial encounterT43.631D..., subsequent encounterT43.631S..., sequelaT43.632Poisoning by methylphenidate, intentional self-harmT43.632A..., initial encounterT43.632D..., subsequent encounterT43.632S..., sequelaT43.633Poisoning by methylphenidate, assaultT43.633A..., initial encounterT43.633D..., subsequent encounterT43.633S..., sequelaT43.634Poisoning by methylphenidate, undeterminedT43.634A..., initial encounterT43.634D..., subsequent encounterT43.634S..., sequelaT43.635Adverse effect of methylphenidateT43.635A..., initial encounterT43.635D..., subsequent encounterT43.635S..., sequelaT43.636Underdosing of methylphenidateT43.636A..., initial encounterT43.636D..., subsequent encounterT43.636S..., sequela