T36-T50

Non-Billable
ChapterS00–T88
Rankblock
Official Description

Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50)

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88).

CH19 Parent Instructions

Excludes2(Not included here)
Use Additional Code
  • code to identify any retained foreign body, if applicable (Z18.-)

Instructional Notes

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(Not coded here)
  • toxic reaction to local anesthesia in pregnancy (O29.3-)
Excludes2(Not included here)
  • 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)
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)
Use Additional Code
  • 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-)

Clinical Hierarchy

CH19Injury, poisoning and certain other consequences of external causes (S00-T88)
T36-T50Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50)
T36Poisoning by, adverse effect of and underdosing of systemic antibiotics
T37Poisoning by, adverse effect of and underdosing of other systemic anti-infectives and antiparasitics
T38Poisoning by, adverse effect of and underdosing of hormones and their synthetic substitutes and antagonists, not elsewhere classified
T39Poisoning by, adverse effect of and underdosing of nonopioid analgesics, antipyretics and antirheumatics
T40Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens]
T41Poisoning by, adverse effect of and underdosing of anesthetics and therapeutic gases
T42Poisoning by, adverse effect of and underdosing of antiepileptic, sedative- hypnotic and antiparkinsonism drugs
T43Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified
T44Poisoning by, adverse effect of and underdosing of drugs primarily affecting the autonomic nervous system
T45Poisoning by, adverse effect of and underdosing of primarily systemic and hematological agents, not elsewhere classified
T46Poisoning by, adverse effect of and underdosing of agents primarily affecting the cardiovascular system
T47Poisoning by, adverse effect of and underdosing of agents primarily affecting the gastrointestinal system
T48Poisoning by, adverse effect of and underdosing of agents primarily acting on smooth and skeletal muscles and the respiratory system
T49Poisoning by, adverse effect of and underdosing of topical agents primarily affecting skin and mucous membrane and by ophthalmological, otorhinorlaryngological and dental drugs
T50Poisoning by, adverse effect of and underdosing of diuretics and other and unspecified drugs, medicaments and biological substances

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to T36-T50:

chapterCH19
Injury, poisoning and certain other consequences of external causes (S00-T88)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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