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Injury, poisoning and certain other consequences of external causes (S00-T88)

Note:: Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.

Use additional: code to identify any retained foreign body, if applicable (Z18.-)
Excludes 1:: birth trauma (P10-P15)
obstetric trauma (O70-O71)

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

Note:: 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.

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
Use additional: code(s) to specify:
Use additional: manifestations of poisoning
Use additional: underdosing or failure in dosage during medical and surgical care (Y63.6, Y63.8-Y63.9)
Use additional: underdosing of medication regimen (Z91.12-, Z91.13-)
Excludes 1:: toxic reaction to local anesthesia in pregnancy (O29.3-)
Excludes 2:: 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)

T36

Poisoning by, adverse effect of and underdosing of systemic antibiotics [+]

Excludes 1:	antineoplastic antibiotics (T45.1-) locally applied antibiotic NEC (T49.0) topically used antibiotic for ear, nose and throat (T49.6) topically used antibiotic for eye (T49.5)
The appropriate 7th character is to be added to each code from category T36 A - initial encounter D - subsequent encounter S - sequela

T37

Poisoning by, adverse effect of and underdosing of other systemic anti-infectives and antiparasitics [+]

Excludes 1:	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

T38

Poisoning by, adverse effect of and underdosing of hormones and their synthetic substitutes and antagonists, not elsewhere classified [+]

Excludes 1:	mineralocorticoids and their antagonists (T50.0-) oxytocic hormones (T48.0-) parathyroid hormones and derivatives (T50.9-)
The appropriate 7th character is to be added to each code from category T38 A - initial encounter D - subsequent encounter S - sequela

T39

Poisoning by, adverse effect of and underdosing of nonopioid analgesics, antipyretics and antirheumatics [+]

The appropriate 7th character is to be added to each code from category T39
A - initial encounter
D - subsequent encounter
S - sequela

T40

Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens] [+]

Excludes 2:	drug dependence and related mental and behavioral disorders due to psychoactive substance use (F10.-F19.-)
The appropriate 7th character is to be added to each code from category T40 A - initial encounter D - subsequent encounter S - sequela

T41

Poisoning by, adverse effect of and underdosing of anesthetics and therapeutic gases [+]

Excludes 1:	benzodiazepines (T42.4-) cocaine (T40.5-) complications of anesthesia during pregnancy (O29.-) complications of anesthesia during labor and delivery (O74.-) complications of anesthesia during the puerperium (O89.-) opioids (T40.0-T40.2-)
The appropriate 7th character is to be added to each code from category T41 A - initial encounter D - subsequent encounter S - sequela

T42

Poisoning by, adverse effect of and underdosing of antiepileptic, sedative- hypnotic and antiparkinsonism drugs [+]

Excludes 2:	drug dependence and related mental and behavioral disorders due to psychoactive substance use (F10.--F19.-)
The appropriate 7th character is to be added to each code from category T42 A - initial encounter D - subsequent encounter S - sequela

T43

Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified [+]

Excludes 1:	appetite depressants (T50.5-) barbiturates (T42.3-) benzodiazepines (T42.4-) methaqualone (T42.6-) psychodysleptics [hallucinogens] (T40.7-T40.9-)
Excludes 2:	drug dependence and related mental and behavioral disorders due to psychoactive substance use (F10.- -F19.-)
The appropriate 7th character is to be added to each code from category T43 A - initial encounter D - subsequent encounter S - sequela

T44

Poisoning by, adverse effect of and underdosing of drugs primarily affecting the autonomic nervous system [+]

The appropriate 7th character is to be added to each code from category T44
A - initial encounter
D - subsequent encounter
S - sequela

T45

Poisoning by, adverse effect of and underdosing of primarily systemic and hematological agents, not elsewhere classified [+]

The appropriate 7th character is to be added to each code from category T45
A - initial encounter
D - subsequent encounter
S - sequela

T46

Poisoning by, adverse effect of and underdosing of agents primarily affecting the cardiovascular system [+]

Excludes 1:	poisoning by, adverse effect of and underdosing of metaraminol (T44.4)
The appropriate 7th character is to be added to each code from category T46 A - initial encounter D - subsequent encounter S - sequela

T47

Poisoning by, adverse effect of and underdosing of agents primarily affecting the gastrointestinal system [+]

The appropriate 7th character is to be added to each code from category T47
A - initial encounter
D - subsequent encounter
S - sequela

T48

Poisoning by, adverse effect of and underdosing of agents primarily acting on smooth and skeletal muscles and the respiratory system [+]

The appropriate 7th character is to be added to each code from category T48
A - initial encounter
D - subsequent encounter
S - sequela

T49

Poisoning by, adverse effect of and underdosing of topical agents primarily affecting skin and mucous membrane and by ophthalmological, otorhinorlaryngological and dental drugs [+]

Includes:	poisoning by, adverse effect of and underdosing of glucocorticoids, topically used
The appropriate 7th character is to be added to each code from category T49 A - initial encounter D - subsequent encounter S - sequela

T50

Poisoning by, adverse effect of and underdosing of diuretics and other and unspecified drugs, medicaments and biological substances [+]

The appropriate 7th character is to be added to each code from category T50
A - initial encounter
D - subsequent encounter
S - sequela