ICD-10-CM > S00-T88 > T51-T65 > T65 > T65.9 T65.9 Toxic effect of unspecified substance Non-Billable/Non-Specific Codes T65.91Toxic effect of unspecified substance, accidental (unintentional)T65.91XA..., initial encounterT65.91XD..., subsequent encounterT65.91XS..., sequelaT65.92Toxic effect of unspecified substance, intentional self-harmT65.92XA..., initial encounterT65.92XD..., subsequent encounterT65.92XS..., sequelaT65.93Toxic effect of unspecified substance, assaultT65.93XA..., initial encounterT65.93XD..., subsequent encounterT65.93XS..., sequelaT65.94Toxic effect of unspecified substance, undeterminedT65.94XA..., initial encounterT65.94XD..., subsequent encounterT65.94XS..., sequela