The drug giving rise to the adverse effect should be identified by use of codes from categories T36-T50 with fifth or sixth character 5.

Use Additional code(s) to specify:
manifestations of poisoning
underdosing or failure in dosage during medical and surgical care (Y63.6, Y63.8-Y63.9)
underdosing of medication regimen (Z91.12-, Z91.13-)

Code first   , for adverse effects, the nature of the adverse effect, such as:
  adverse effect NOS (T88.7)
  aspirin gastritis (K29.-)
  blood disorders (D56-D76)
  contact dermatitis (L23-L25)
  dermatitis due to substances taken internally (L27.-)
  nephropathy (N14.0-N14.2)

Includes:

  • adverse effect of correct substance properly administered
  • poisoning by overdose of substance
  • poisoning by wrong substance given or taken in error
  • underdosing by (inadvertently) (deliberately) taking less substance than prescribed or instructed

Excludes1

  • toxic reaction to local anesthesia in pregnancy (O29.3-)

Excludes2

  • abuse and dependence of psychoactive substances (F10-F19)
  • abuse of non-dependence-producing substances (F55.-)
  • drug reaction and poisoning affecting newborn (P00-P96)
  • pathological drug intoxication (inebriation) (F10-F19)
  1. T37 Poisoning by, adverse effect of and underdosing of other systemic anti-infectives and antiparasitics

    Excludes1

    • anti-infectives topically used for ear, nose and throat (T49.6-)
    • anti-infectives topically used for eye (T49.5-)
    • locally applied anti-infectives NEC (T49.0-)

    The appropriate 7th character is to be added to each code from category T37

    • A - initial encounter
    • D - subsequent encounter
    • S - sequela
    1. T37.0 Poisoning by, adverse effect of and underdosing of sulfonamides

      1. T37.0X Poisoning by, adverse effect of and underdosing of sulfonamides

        • T37.0X1 Poisoning by sulfonamides, accidental (unintentional)

          Inclusion term(s):

          • Poisoning by sulfonamides NOS
        • T37.0X2 Poisoning by sulfonamides, intentional self-harm
        • T37.0X3 Poisoning by sulfonamides, assault
        • T37.0X4 Poisoning by sulfonamides, undetermined
        • T37.0X5 Adverse effect of sulfonamides
        • T37.0X6 Underdosing of sulfonamides
    2. T37.1 Poisoning by, adverse effect of and underdosing of antimycobacterial drugs

      1. T37.1X Poisoning by, adverse effect of and underdosing of antimycobacterial drugs

        • T37.1X1 Poisoning by antimycobacterial drugs, accidental (unintentional)

          Inclusion term(s):

          • Poisoning by antimycobacterial drugs NOS
        • T37.1X2 Poisoning by antimycobacterial drugs, intentional self-harm
        • T37.1X3 Poisoning by antimycobacterial drugs, assault
        • T37.1X4 Poisoning by antimycobacterial drugs, undetermined
        • T37.1X5 Adverse effect of antimycobacterial drugs
        • T37.1X6 Underdosing of antimycobacterial drugs
    3. T37.2 Poisoning by, adverse effect of and underdosing of antimalarials and drugs acting on other blood protozoa

      1. T37.2X Poisoning by, adverse effect of and underdosing of antimalarials and drugs acting on other blood protozoa

        • T37.2X1 Poisoning by antimalarials and drugs acting on other blood protozoa, accidental (unintentional)

          Inclusion term(s):

          • Poisoning by antimalarials and drugs acting on other blood protozoa NOS
        • T37.2X2 Poisoning by antimalarials and drugs acting on other blood protozoa, intentional self-harm
        • T37.2X3 Poisoning by antimalarials and drugs acting on other blood protozoa, assault
        • T37.2X4 Poisoning by antimalarials and drugs acting on other blood protozoa, undetermined
        • T37.2X5 Adverse effect of antimalarials and drugs acting on other blood protozoa
        • T37.2X6 Underdosing of antimalarials and drugs acting on other blood protozoa
    4. T37.3 Poisoning by, adverse effect of and underdosing of other antiprotozoal drugs

      1. T37.3X Poisoning by, adverse effect of and underdosing of other antiprotozoal drugs

        • T37.3X1 Poisoning by other antiprotozoal drugs, accidental (unintentional)

          Inclusion term(s):

          • Poisoning by other antiprotozoal drugs NOS
        • T37.3X2 Poisoning by other antiprotozoal drugs, intentional self-harm
        • T37.3X3 Poisoning by other antiprotozoal drugs, assault
        • T37.3X4 Poisoning by other antiprotozoal drugs, undetermined
        • T37.3X5 Adverse effect of other antiprotozoal drugs
        • T37.3X6 Underdosing of other antiprotozoal drugs
    5. T37.4 Poisoning by, adverse effect of and underdosing of anthelminthics

      1. T37.4X Poisoning by, adverse effect of and underdosing of anthelminthics

        • T37.4X1 Poisoning by anthelminthics, accidental (unintentional)

          Inclusion term(s):

          • Poisoning by anthelminthics NOS
        • T37.4X2 Poisoning by anthelminthics, intentional self-harm
        • T37.4X3 Poisoning by anthelminthics, assault
        • T37.4X4 Poisoning by anthelminthics, undetermined
        • T37.4X5 Adverse effect of anthelminthics
        • T37.4X6 Underdosing of anthelminthics
    6. T37.5 Poisoning by, adverse effect of and underdosing of antiviral drugs

      1. T37.5X Poisoning by, adverse effect of and underdosing of antiviral drugs

        • T37.5X1 Poisoning by antiviral drugs, accidental (unintentional)

          Inclusion term(s):

          • Poisoning by antiviral drugs NOS
        • T37.5X2 Poisoning by antiviral drugs, intentional self-harm
        • T37.5X3 Poisoning by antiviral drugs, assault
        • T37.5X4 Poisoning by antiviral drugs, undetermined
        • T37.5X5 Adverse effect of antiviral drugs
        • T37.5X6 Underdosing of antiviral drugs
    7. T37.8 Poisoning by, adverse effect of and underdosing of other specified systemic anti-infectives and antiparasitics

      Inclusion term(s):

      • Poisoning by, adverse effect of and underdosing of hydroxyquinoline derivatives
      1. T37.8X Poisoning by, adverse effect of and underdosing of other specified systemic anti-infectives and antiparasitics

        • T37.8X1 Poisoning by other specified systemic anti-infectives and antiparasitics, accidental (unintentional)

          Inclusion term(s):

          • Poisoning by other specified systemic anti-infectives and antiparasitics NOS
        • T37.8X2 Poisoning by other specified systemic anti-infectives and antiparasitics, intentional self-harm
        • T37.8X3 Poisoning by other specified systemic anti-infectives and antiparasitics, assault
        • T37.8X4 Poisoning by other specified systemic anti-infectives and antiparasitics, undetermined
        • T37.8X5 Adverse effect of other specified systemic anti-infectives and antiparasitics
        • T37.8X6 Underdosing of other specified systemic anti-infectives and antiparasitics
    8. T37.9 Poisoning by, adverse effect of and underdosing of unspecified systemic anti-infective and antiparasitics

      1. T37.91 Poisoning by unspecified systemic anti-infective and antiparasitics, accidental (unintentional)

        Inclusion term(s):

        • Poisoning by, adverse effect of and underdosing of systemic anti-infective and antiparasitics NOS
      2. T37.92 Poisoning by unspecified systemic anti-infective and antiparasitics, intentional self-harm

      3. T37.93 Poisoning by unspecified systemic anti-infective and antiparasitics, assault

      4. T37.94 Poisoning by unspecified systemic anti-infective and antiparasitics, undetermined

      5. T37.95 Adverse effect of unspecified systemic anti-infective and antiparasitic

      6. T37.96 Underdosing of unspecified systemic anti-infectives and antiparasitics

Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.