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Free Medical Coding > ICD10 CM > 2025 ICD-10-CM Codes > 2025 ICD-10-CM Codes S00-T88 – Injury, poisoning and certain other consequences of external causes (S00-T88) > 2025 ICD-10-CM Codes T36-T50 – Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50)

2025 ICD-10-CM Codes T36-T50 – Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50)

Type 1 Excludes

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

Type 2 Excludes

  • 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)

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

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-)
  • Codes Description
  • T36
    Poisoning by, adverse effect of and underdosing of systemic antibiotics
  • T37
    Poisoning by, adverse effect of and underdosing of other systemic anti-infectives and antiparasitics
  • T38
    Poisoning by, adverse effect of and underdosing of hormones and their synthetic substitutes and antagonists, not elsewhere classified
  • T39
    Poisoning by, adverse effect of and underdosing of nonopioid analgesics, antipyretics and antirheumatics
  • T40
    Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens]
  • T41
    Poisoning by, adverse effect of and underdosing of anesthetics and therapeutic gases
  • T42
    Poisoning by, adverse effect of and underdosing of antiepileptic, sedative- hypnotic and antiparkinsonism drugs
  • T43
    Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified
  • T44
    Poisoning by, adverse effect of and underdosing of drugs primarily affecting the autonomic nervous system
  • T45
    Poisoning by, adverse effect of and underdosing of primarily systemic and hematological agents, not elsewhere classified
  • T46
    Poisoning by, adverse effect of and underdosing of agents primarily affecting the cardiovascular system
  • T47
    Poisoning by, adverse effect of and underdosing of agents primarily affecting the gastrointestinal system
  • T48
    Poisoning by, adverse effect of and underdosing of agents primarily acting on smooth and skeletal muscles and the respiratory system
  • T49
    Poisoning by, adverse effect of and underdosing of topical agents primarily affecting skin and mucous membrane and by ophthalmological, otorhinorlaryngological and dental drugs
  • T50
    Poisoning by, adverse effect of and underdosing of diuretics and other and unspecified drugs, medicaments and biological substances

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