T48.901 - Poisoning by unspecified agents primarily acting on the respiratory system, accidental (unintentional) T48.9 - Poisoning by, adverse effect of and underdosing of other and unspecified agents primarily acting on the respiratory system T48.90 - Poisoning by, adverse effect of and underdosing of unspecified agents primarily acting on the respiratory system T48.901 - Poisoning by unspecified agents primarily acting on the respiratory system, accidental (unintentional)