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T37 Other systemic anti-infectives and antiparasitics

ICD-10-CM category T37 sits in Chapter 20 (External causes of morbidity, V00-Y99). It contains 144 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.

Subcategories

T37.0 SulfonamidesT37.0X SulfonamidesT37.0X1 Poisoning by sulfonamides, accidental (unintentional)T37.0X2 Poisoning by sulfonamides, intentional self-harmT37.0X3 Poisoning by sulfonamides, assaultT37.0X4 Poisoning by sulfonamides, undeterminedT37.0X5 Adverse effect of sulfonamidesT37.0X6 Underdosing of sulfonamidesT37.1 Antimycobacterial drugsT37.1X Antimycobacterial drugsT37.1X1 Poisoning by antimycobac drugs, accidental (unintentional)T37.1X2 Poisoning by antimycobacterial drugs, intentional self-harmT37.1X3 Poisoning by antimycobacterial drugs, assaultT37.1X4 Poisoning by antimycobacterial drugs, undeterminedT37.1X5 Adverse effect of antimycobacterial drugsT37.1X6 Underdosing of antimycobacterial drugsT37.2 Antimalarials and drugs acting on bld protzoaT37.2X Antimalarials and drugs acting on bld protzoaT37.2X1 Poisoning by antimalari/drugs acting on bld protzoa, accT37.2X2 Poisn by antimalari/drugs acting on bld protzoa, self-harmT37.2X3 Poisoning by antimalari/drugs acting on bld protzoa, assaultT37.2X4 Poisoning by antimalari/drugs acting on bld protzoa, undetT37.2X5 Adverse effect of antimalari/drugs acting on bld protzoaT37.2X6 Underdosing of antimalarials and drugs acting on bld protzoaT37.3 Antiprotozoal drugsT37.3X Antiprotozoal drugsT37.3X1 Poisoning by oth antiprotozoal drugs, accidentalT37.3X2 Poisoning by oth antiprotozoal drugs, intentional self-harmT37.3X3 Poisoning by other antiprotozoal drugs, assaultT37.3X4 Poisoning by other antiprotozoal drugs, undeterminedT37.3X5 Adverse effect of other antiprotozoal drugsT37.3X6 Underdosing of other antiprotozoal drugsT37.4 AnthelminthicsT37.4X AnthelminthicsT37.4X1 Poisoning by anthelminthics, accidental (unintentional)T37.4X2 Poisoning by anthelminthics, intentional self-harmT37.4X3 Poisoning by anthelminthics, assaultT37.4X4 Poisoning by anthelminthics, undeterminedT37.4X5 Adverse effect of anthelminthicsT37.4X6 Underdosing of anthelminthics

Billable codes in T37

CodeDescription
T37.0X1APoisoning by sulfonamides, accidental (unintentional), initial encounter
T37.0X1DPoisoning by sulfonamides, accidental (unintentional), subsequent encounter
T37.0X1SPoisoning by sulfonamides, accidental (unintentional), sequela
T37.0X2APoisoning by sulfonamides, intentional self-harm, initial encounter
T37.0X2DPoisoning by sulfonamides, intentional self-harm, subsequent encounter
T37.0X2SPoisoning by sulfonamides, intentional self-harm, sequela
T37.0X3APoisoning by sulfonamides, assault, initial encounter
T37.0X3DPoisoning by sulfonamides, assault, subsequent encounter
T37.0X3SPoisoning by sulfonamides, assault, sequela
T37.0X4APoisoning by sulfonamides, undetermined, initial encounter
T37.0X4DPoisoning by sulfonamides, undetermined, subsequent encounter
T37.0X4SPoisoning by sulfonamides, undetermined, sequela
T37.0X5AAdverse effect of sulfonamides, initial encounter
T37.0X5DAdverse effect of sulfonamides, subsequent encounter
T37.0X5SAdverse effect of sulfonamides, sequela
T37.0X6AUnderdosing of sulfonamides, initial encounter
T37.0X6DUnderdosing of sulfonamides, subsequent encounter
T37.0X6SUnderdosing of sulfonamides, sequela
T37.1X1APoisoning by antimycobacterial drugs, accidental (unintentional), initial encounter
T37.1X1DPoisoning by antimycobacterial drugs, accidental (unintentional), subsequent encounter
T37.1X1SPoisoning by antimycobacterial drugs, accidental (unintentional), sequela
T37.1X2APoisoning by antimycobacterial drugs, intentional self-harm, initial encounter
T37.1X2DPoisoning by antimycobacterial drugs, intentional self-harm, subsequent encounter
T37.1X2SPoisoning by antimycobacterial drugs, intentional self-harm, sequela
T37.1X3APoisoning by antimycobacterial drugs, assault, initial encounter
T37.1X3DPoisoning by antimycobacterial drugs, assault, subsequent encounter
T37.1X3SPoisoning by antimycobacterial drugs, assault, sequela
T37.1X4APoisoning by antimycobacterial drugs, undetermined, initial encounter
T37.1X4DPoisoning by antimycobacterial drugs, undetermined, subsequent encounter
T37.1X4SPoisoning by antimycobacterial drugs, undetermined, sequela
T37.1X5AAdverse effect of antimycobacterial drugs, initial encounter
T37.1X5DAdverse effect of antimycobacterial drugs, subsequent encounter
T37.1X5SAdverse effect of antimycobacterial drugs, sequela
T37.1X6AUnderdosing of antimycobacterial drugs, initial encounter
T37.1X6DUnderdosing of antimycobacterial drugs, subsequent encounter
T37.1X6SUnderdosing of antimycobacterial drugs, sequela
T37.2X1APoisoning by antimalarials and drugs acting on other blood protozoa, accidental (unintentional), initial encounter
T37.2X1DPoisoning by antimalarials and drugs acting on other blood protozoa, accidental (unintentional), subsequent encounter
T37.2X1SPoisoning by antimalarials and drugs acting on other blood protozoa, accidental (unintentional), sequela
T37.2X2APoisoning by antimalarials and drugs acting on other blood protozoa, intentional self-harm, initial encounter
T37.2X2DPoisoning by antimalarials and drugs acting on other blood protozoa, intentional self-harm, subsequent encounter
T37.2X2SPoisoning by antimalarials and drugs acting on other blood protozoa, intentional self-harm, sequela
T37.2X3APoisoning by antimalarials and drugs acting on other blood protozoa, assault, initial encounter
T37.2X3DPoisoning by antimalarials and drugs acting on other blood protozoa, assault, subsequent encounter
T37.2X3SPoisoning by antimalarials and drugs acting on other blood protozoa, assault, sequela
T37.2X4APoisoning by antimalarials and drugs acting on other blood protozoa, undetermined, initial encounter
T37.2X4DPoisoning by antimalarials and drugs acting on other blood protozoa, undetermined, subsequent encounter
T37.2X4SPoisoning by antimalarials and drugs acting on other blood protozoa, undetermined, sequela
T37.2X5AAdverse effect of antimalarials and drugs acting on other blood protozoa, initial encounter
T37.2X5DAdverse effect of antimalarials and drugs acting on other blood protozoa, subsequent encounter
T37.2X5SAdverse effect of antimalarials and drugs acting on other blood protozoa, sequela
T37.2X6AUnderdosing of antimalarials and drugs acting on other blood protozoa, initial encounter
T37.2X6DUnderdosing of antimalarials and drugs acting on other blood protozoa, subsequent encounter
T37.2X6SUnderdosing of antimalarials and drugs acting on other blood protozoa, sequela
T37.3X1APoisoning by other antiprotozoal drugs, accidental (unintentional), initial encounter
T37.3X1DPoisoning by other antiprotozoal drugs, accidental (unintentional), subsequent encounter
T37.3X1SPoisoning by other antiprotozoal drugs, accidental (unintentional), sequela
T37.3X2APoisoning by other antiprotozoal drugs, intentional self-harm, initial encounter
T37.3X2DPoisoning by other antiprotozoal drugs, intentional self-harm, subsequent encounter
T37.3X2SPoisoning by other antiprotozoal drugs, intentional self-harm, sequela
T37.3X3APoisoning by other antiprotozoal drugs, assault, initial encounter
T37.3X3DPoisoning by other antiprotozoal drugs, assault, subsequent encounter
T37.3X3SPoisoning by other antiprotozoal drugs, assault, sequela
T37.3X4APoisoning by other antiprotozoal drugs, undetermined, initial encounter
T37.3X4DPoisoning by other antiprotozoal drugs, undetermined, subsequent encounter
T37.3X4SPoisoning by other antiprotozoal drugs, undetermined, sequela
T37.3X5AAdverse effect of other antiprotozoal drugs, initial encounter
T37.3X5DAdverse effect of other antiprotozoal drugs, subsequent encounter
T37.3X5SAdverse effect of other antiprotozoal drugs, sequela
T37.3X6AUnderdosing of other antiprotozoal drugs, initial encounter
T37.3X6DUnderdosing of other antiprotozoal drugs, subsequent encounter
T37.3X6SUnderdosing of other antiprotozoal drugs, sequela
T37.4X1APoisoning by anthelminthics, accidental (unintentional), initial encounter
T37.4X1DPoisoning by anthelminthics, accidental (unintentional), subsequent encounter
T37.4X1SPoisoning by anthelminthics, accidental (unintentional), sequela
T37.4X2APoisoning by anthelminthics, intentional self-harm, initial encounter
T37.4X2DPoisoning by anthelminthics, intentional self-harm, subsequent encounter
T37.4X2SPoisoning by anthelminthics, intentional self-harm, sequela
T37.4X3APoisoning by anthelminthics, assault, initial encounter
T37.4X3DPoisoning by anthelminthics, assault, subsequent encounter
T37.4X3SPoisoning by anthelminthics, assault, sequela
T37.4X4APoisoning by anthelminthics, undetermined, initial encounter
T37.4X4DPoisoning by anthelminthics, undetermined, subsequent encounter
T37.4X4SPoisoning by anthelminthics, undetermined, sequela
T37.4X5AAdverse effect of anthelminthics, initial encounter
T37.4X5DAdverse effect of anthelminthics, subsequent encounter
T37.4X5SAdverse effect of anthelminthics, sequela
T37.4X6AUnderdosing of anthelminthics, initial encounter
T37.4X6DUnderdosing of anthelminthics, subsequent encounter
T37.4X6SUnderdosing of anthelminthics, sequela
T37.5X1APoisoning by antiviral drugs, accidental (unintentional), initial encounter
T37.5X1DPoisoning by antiviral drugs, accidental (unintentional), subsequent encounter
T37.5X1SPoisoning by antiviral drugs, accidental (unintentional), sequela
T37.5X2APoisoning by antiviral drugs, intentional self-harm, initial encounter
T37.5X2DPoisoning by antiviral drugs, intentional self-harm, subsequent encounter
T37.5X2SPoisoning by antiviral drugs, intentional self-harm, sequela
T37.5X3APoisoning by antiviral drugs, assault, initial encounter
T37.5X3DPoisoning by antiviral drugs, assault, subsequent encounter
T37.5X3SPoisoning by antiviral drugs, assault, sequela
T37.5X4APoisoning by antiviral drugs, undetermined, initial encounter
T37.5X4DPoisoning by antiviral drugs, undetermined, subsequent encounter
T37.5X4SPoisoning by antiviral drugs, undetermined, sequela
T37.5X5AAdverse effect of antiviral drugs, initial encounter
T37.5X5DAdverse effect of antiviral drugs, subsequent encounter
T37.5X5SAdverse effect of antiviral drugs, sequela
T37.5X6AUnderdosing of antiviral drugs, initial encounter
T37.5X6DUnderdosing of antiviral drugs, subsequent encounter
T37.5X6SUnderdosing of antiviral drugs, sequela
T37.8X1APoisoning by other specified systemic anti-infectives and antiparasitics, accidental (unintentional), initial encounter
T37.8X1DPoisoning by other specified systemic anti-infectives and antiparasitics, accidental (unintentional), subsequent encounter
T37.8X1SPoisoning by other specified systemic anti-infectives and antiparasitics, accidental (unintentional), sequela
T37.8X2APoisoning by other specified systemic anti-infectives and antiparasitics, intentional self-harm, initial encounter
T37.8X2DPoisoning by other specified systemic anti-infectives and antiparasitics, intentional self-harm, subsequent encounter
T37.8X2SPoisoning by other specified systemic anti-infectives and antiparasitics, intentional self-harm, sequela
T37.8X3APoisoning by other specified systemic anti-infectives and antiparasitics, assault, initial encounter
T37.8X3DPoisoning by other specified systemic anti-infectives and antiparasitics, assault, subsequent encounter
T37.8X3SPoisoning by other specified systemic anti-infectives and antiparasitics, assault, sequela
T37.8X4APoisoning by other specified systemic anti-infectives and antiparasitics, undetermined, initial encounter
T37.8X4DPoisoning by other specified systemic anti-infectives and antiparasitics, undetermined, subsequent encounter
T37.8X4SPoisoning by other specified systemic anti-infectives and antiparasitics, undetermined, sequela
T37.8X5AAdverse effect of other specified systemic anti-infectives and antiparasitics, initial encounter
T37.8X5DAdverse effect of other specified systemic anti-infectives and antiparasitics, subsequent encounter
T37.8X5SAdverse effect of other specified systemic anti-infectives and antiparasitics, sequela
T37.8X6AUnderdosing of other specified systemic anti-infectives and antiparasitics, initial encounter
T37.8X6DUnderdosing of other specified systemic anti-infectives and antiparasitics, subsequent encounter
T37.8X6SUnderdosing of other specified systemic anti-infectives and antiparasitics, sequela
T37.91XAPoisoning by unspecified systemic anti-infective and antiparasitics, accidental (unintentional), initial encounter
T37.91XDPoisoning by unspecified systemic anti-infective and antiparasitics, accidental (unintentional), subsequent encounter
T37.91XSPoisoning by unspecified systemic anti-infective and antiparasitics, accidental (unintentional), sequela
T37.92XAPoisoning by unspecified systemic anti-infective and antiparasitics, intentional self-harm, initial encounter
T37.92XDPoisoning by unspecified systemic anti-infective and antiparasitics, intentional self-harm, subsequent encounter
T37.92XSPoisoning by unspecified systemic anti-infective and antiparasitics, intentional self-harm, sequela
T37.93XAPoisoning by unspecified systemic anti-infective and antiparasitics, assault, initial encounter
T37.93XDPoisoning by unspecified systemic anti-infective and antiparasitics, assault, subsequent encounter
T37.93XSPoisoning by unspecified systemic anti-infective and antiparasitics, assault, sequela
T37.94XAPoisoning by unspecified systemic anti-infective and antiparasitics, undetermined, initial encounter
T37.94XDPoisoning by unspecified systemic anti-infective and antiparasitics, undetermined, subsequent encounter
T37.94XSPoisoning by unspecified systemic anti-infective and antiparasitics, undetermined, sequela
T37.95XAAdverse effect of unspecified systemic anti-infective and antiparasitic, initial encounter
T37.95XDAdverse effect of unspecified systemic anti-infective and antiparasitic, subsequent encounter
T37.95XSAdverse effect of unspecified systemic anti-infective and antiparasitic, sequela
T37.96XAUnderdosing of unspecified systemic anti-infectives and antiparasitics, initial encounter
T37.96XDUnderdosing of unspecified systemic anti-infectives and antiparasitics, subsequent encounter
T37.96XSUnderdosing of unspecified systemic anti-infectives and antiparasitics, sequela

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