T37.8X6 - Underdosing of other specified systemic anti-infectives and antiparasitics T37.8 - Poisoning by, adverse effect of and underdosing of other specified systemic anti-infectives and antiparasitics T37.8X - Poisoning by, adverse effect of and underdosing of other specified systemic anti-infectives and antiparasitics T37.8X6 - Underdosing of other specified systemic anti-infectives and antiparasitics