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.-)
  • immunodeficiency due to drugs (D84.821)
  • drug reaction and poisoning affecting newborn (P00-P96)
  • pathological drug intoxication (inebriation) (F10-F19)
  1. T47 Poisoning by, adverse effect of and underdosing of agents primarily affecting the gastrointestinal system

    1. T47.0 Poisoning by, adverse effect of and underdosing of histamine H2-receptor blockers

      1. T47.0X Poisoning by, adverse effect of and underdosing of histamine H2-receptor blockers

        • T47.0X1 Poisoning by histamine H2-receptor blockers, accidental (unintentional)

          Inclusion term(s):

          • Poisoning by histamine H2-receptor blockers NOS
        • T47.0X2 Poisoning by histamine H2-receptor blockers, intentional self-harm
        • T47.0X3 Poisoning by histamine H2-receptor blockers, assault
        • T47.0X4 Poisoning by histamine H2-receptor blockers, undetermined
        • T47.0X5 Adverse effect of histamine H2-receptor blockers
        • T47.0X6 Underdosing of histamine H2-receptor blockers
    2. T47.1 Poisoning by, adverse effect of and underdosing of other antacids and anti-gastric-secretion drugs

      1. T47.1X Poisoning by, adverse effect of and underdosing of other antacids and anti-gastric-secretion drugs

        • T47.1X1 Poisoning by other antacids and anti-gastric-secretion drugs, accidental (unintentional)

          Inclusion term(s):

          • Poisoning by other antacids and anti-gastric-secretion drugs NOS
        • T47.1X2 Poisoning by other antacids and anti-gastric-secretion drugs, intentional self-harm
        • T47.1X3 Poisoning by other antacids and anti-gastric-secretion drugs, assault
        • T47.1X4 Poisoning by other antacids and anti-gastric-secretion drugs, undetermined
        • T47.1X5 Adverse effect of other antacids and anti-gastric-secretion drugs
        • T47.1X6 Underdosing of other antacids and anti-gastric-secretion drugs
    3. T47.2 Poisoning by, adverse effect of and underdosing of stimulant laxatives

      1. T47.2X Poisoning by, adverse effect of and underdosing of stimulant laxatives

        • T47.2X1 Poisoning by stimulant laxatives, accidental (unintentional)

          Inclusion term(s):

          • Poisoning by stimulant laxatives NOS
        • T47.2X2 Poisoning by stimulant laxatives, intentional self-harm
        • T47.2X3 Poisoning by stimulant laxatives, assault
        • T47.2X4 Poisoning by stimulant laxatives, undetermined
        • T47.2X5 Adverse effect of stimulant laxatives
        • T47.2X6 Underdosing of stimulant laxatives
    4. T47.3 Poisoning by, adverse effect of and underdosing of saline and osmotic laxatives

      1. T47.3X Poisoning by and adverse effect of saline and osmotic laxatives

        • T47.3X1 Poisoning by saline and osmotic laxatives, accidental (unintentional)

          Inclusion term(s):

          • Poisoning by saline and osmotic laxatives NOS
        • T47.3X2 Poisoning by saline and osmotic laxatives, intentional self-harm
        • T47.3X3 Poisoning by saline and osmotic laxatives, assault
        • T47.3X4 Poisoning by saline and osmotic laxatives, undetermined
        • T47.3X5 Adverse effect of saline and osmotic laxatives
        • T47.3X6 Underdosing of saline and osmotic laxatives
    5. T47.4 Poisoning by, adverse effect of and underdosing of other laxatives

      1. T47.4X Poisoning by, adverse effect of and underdosing of other laxatives

        • T47.4X1 Poisoning by other laxatives, accidental (unintentional)

          Inclusion term(s):

          • Poisoning by other laxatives NOS
        • T47.4X2 Poisoning by other laxatives, intentional self-harm
        • T47.4X3 Poisoning by other laxatives, assault
        • T47.4X4 Poisoning by other laxatives, undetermined
        • T47.4X5 Adverse effect of other laxatives
        • T47.4X6 Underdosing of other laxatives
    6. T47.5 Poisoning by, adverse effect of and underdosing of digestants

      1. T47.5X Poisoning by, adverse effect of and underdosing of digestants

        • T47.5X1 Poisoning by digestants, accidental (unintentional)

          Inclusion term(s):

          • Poisoning by digestants NOS
        • T47.5X2 Poisoning by digestants, intentional self-harm
        • T47.5X3 Poisoning by digestants, assault
        • T47.5X4 Poisoning by digestants, undetermined
        • T47.5X5 Adverse effect of digestants
        • T47.5X6 Underdosing of digestants
    7. T47.6 Poisoning by, adverse effect of and underdosing of antidiarrheal drugs

      1. T47.6X Poisoning by, adverse effect of and underdosing of antidiarrheal drugs

        • T47.6X1 Poisoning by antidiarrheal drugs, accidental (unintentional)

          Inclusion term(s):

          • Poisoning by antidiarrheal drugs NOS
        • T47.6X2 Poisoning by antidiarrheal drugs, intentional self-harm
        • T47.6X3 Poisoning by antidiarrheal drugs, assault
        • T47.6X4 Poisoning by antidiarrheal drugs, undetermined
        • T47.6X5 Adverse effect of antidiarrheal drugs
        • T47.6X6 Underdosing of antidiarrheal drugs
    8. T47.7 Poisoning by, adverse effect of and underdosing of emetics

      1. T47.7X Poisoning by, adverse effect of and underdosing of emetics

    9. T47.8 Poisoning by, adverse effect of and underdosing of other agents primarily affecting gastrointestinal system

      1. T47.8X Poisoning by, adverse effect of and underdosing of other agents primarily affecting gastrointestinal system

        • T47.8X1 Poisoning by other agents primarily affecting gastrointestinal system, accidental (unintentional)

          Inclusion term(s):

          • Poisoning by other agents primarily affecting gastrointestinal system NOS
        • T47.8X2 Poisoning by other agents primarily affecting gastrointestinal system, intentional self-harm
        • T47.8X3 Poisoning by other agents primarily affecting gastrointestinal system, assault
        • T47.8X4 Poisoning by other agents primarily affecting gastrointestinal system, undetermined
        • T47.8X5 Adverse effect of other agents primarily affecting gastrointestinal system
        • T47.8X6 Underdosing of other agents primarily affecting gastrointestinal system
    10. T47.9 Poisoning by, adverse effect of and underdosing of unspecified agents primarily affecting the gastrointestinal system

      1. T47.91 Poisoning by unspecified agents primarily affecting the gastrointestinal system, accidental (unintentional)

        Inclusion term(s):

        • Poisoning by agents primarily affecting the gastrointestinal system NOS
      2. T47.92 Poisoning by unspecified agents primarily affecting the gastrointestinal system, intentional self-harm

      3. T47.93 Poisoning by unspecified agents primarily affecting the gastrointestinal system, assault

      4. T47.94 Poisoning by unspecified agents primarily affecting the gastrointestinal system, undetermined

      5. T47.95 Adverse effect of unspecified agents primarily affecting the gastrointestinal system

      6. T47.96 Underdosing of unspecified agents primarily affecting the gastrointestinal system

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.