T57.3X - Toxic effect of hydrogen cyanide T57.3 - Toxic effect of hydrogen cyanide T57.3X - Toxic effect of hydrogen cyanide T57.3X1 - Toxic effect of hydrogen cyanide, accidental (unintentional) T57.3X2 - Toxic effect of hydrogen cyanide, intentional self-harm T57.3X3 - Toxic effect of hydrogen cyanide, assault T57.3X4 - Toxic effect of hydrogen cyanide, undetermined