T40-T52
Medium Complexity

Burns and corrosions confined to eye and internal organs

Primary Specialty: Ophthalmology
Last Updated: 2025-09-09

ICD-10 Codes (200)

0 billable
195 category headers
T41
Poisoning by, adverse effect of and underdosing of anesthetics and therapeutic gases
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T41.0
Poisoning by, adverse effect of and underdosing of inhaled anesthetics
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T41.1
Poisoning by, adverse effect of and underdosing of intravenous anesthetics
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T41.2
Poisoning by, adverse effect of and underdosing of other and unspecified general anesthetics
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T41.20
Poisoning by, adverse effect of and underdosing of unspecified general anesthetics
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T41.201
Poisoning by unspecified general anesthetics, accidental (unintentional)
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T41.202
Poisoning by unspecified general anesthetics, intentional self-harm
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T41.203
Poisoning by unspecified general anesthetics, assault
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T41.204
Poisoning by unspecified general anesthetics, undetermined
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T41.205
Adverse effect of unspecified general anesthetics
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T41.206
Underdosing of unspecified general anesthetics
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T41.29
Poisoning by, adverse effect of and underdosing of other general anesthetics
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T41.291
Poisoning by other general anesthetics, accidental (unintentional)
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T41.292
Poisoning by other general anesthetics, intentional self-harm
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T41.293
Poisoning by other general anesthetics, assault
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T41.294
Poisoning by other general anesthetics, undetermined
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T41.295
Adverse effect of other general anesthetics
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T41.296
Underdosing of other general anesthetics
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T41.3
Poisoning by, adverse effect of and underdosing of local anesthetics
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T41.4
Poisoning by, adverse effect of and underdosing of unspecified anesthetic
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T41.41
Poisoning by unspecified anesthetic, accidental (unintentional)
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T41.42
Poisoning by unspecified anesthetic, intentional self-harm
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T41.43
Poisoning by unspecified anesthetic, assault
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T41.44
Poisoning by unspecified anesthetic, undetermined
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T41.45
Adverse effect of unspecified anesthetic
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T41.46
Underdosing of unspecified anesthetics
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T41.5
Poisoning by, adverse effect of and underdosing of therapeutic gases
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T42
Poisoning by, adverse effect of and underdosing of antiepileptic, sedative- hypnotic and antiparkinsonism drugs
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T42.0
Poisoning by, adverse effect of and underdosing of hydantoin derivatives
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T42.1
Poisoning by, adverse effect of and underdosing of iminostilbenes
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T42.2
Poisoning by, adverse effect of and underdosing of succinimides and oxazolidinediones
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T42.3
Poisoning by, adverse effect of and underdosing of barbiturates
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T42.4
Poisoning by, adverse effect of and underdosing of benzodiazepines
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T42.5
Poisoning by, adverse effect of and underdosing of mixed antiepileptics
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T42.6
Poisoning by, adverse effect of and underdosing of other antiepileptic and sedative-hypnotic drugs
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T42.7
Poisoning by, adverse effect of and underdosing of unspecified antiepileptic and sedative-hypnotic drugs
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T42.71
Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, accidental (unintentional)
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T42.72
Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, intentional self-harm
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T42.73
Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, assault
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T42.74
Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, undetermined
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T42.75
Adverse effect of unspecified antiepileptic and sedative-hypnotic drugs
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T42.76
Underdosing of unspecified antiepileptic and sedative-hypnotic drugs
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T42.8
Poisoning by, adverse effect of and underdosing of antiparkinsonism drugs and other central muscle-tone depressants
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T43
Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified
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T43.0
Poisoning by, adverse effect of and underdosing of tricyclic and tetracyclic antidepressants
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T43.01
Poisoning by, adverse effect of and underdosing of tricyclic antidepressants
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T43.011
Poisoning by tricyclic antidepressants, accidental (unintentional)
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T43.012
Poisoning by tricyclic antidepressants, intentional self-harm
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T43.013
Poisoning by tricyclic antidepressants, assault
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T43.014
Poisoning by tricyclic antidepressants, undetermined
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T43.015
Adverse effect of tricyclic antidepressants
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T43.016
Underdosing of tricyclic antidepressants
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T43.02
Poisoning by, adverse effect of and underdosing of tetracyclic antidepressants
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T43.021
Poisoning by tetracyclic antidepressants, accidental (unintentional)
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T43.022
Poisoning by tetracyclic antidepressants, intentional self-harm
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T43.023
Poisoning by tetracyclic antidepressants, assault
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T43.024
Poisoning by tetracyclic antidepressants, undetermined
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T43.025
Adverse effect of tetracyclic antidepressants
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T43.026
Underdosing of tetracyclic antidepressants
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T43.1
Poisoning by, adverse effect of and underdosing of monoamine-oxidase-inhibitor antidepressants
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T43.2
Poisoning by, adverse effect of and underdosing of other and unspecified antidepressants
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T43.20
Poisoning by, adverse effect of and underdosing of unspecified antidepressants
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T43.201
Poisoning by unspecified antidepressants, accidental (unintentional)
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T43.202
Poisoning by unspecified antidepressants, intentional self-harm
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T43.203
Poisoning by unspecified antidepressants, assault
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T43.204
Poisoning by unspecified antidepressants, undetermined
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T43.205
Adverse effect of unspecified antidepressants
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T43.206
Underdosing of unspecified antidepressants
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T43.21
Poisoning by, adverse effect of and underdosing of selective serotonin and norepinephrine reuptake inhibitors
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T43.211
Poisoning by selective serotonin and norepinephrine reuptake inhibitors, accidental (unintentional)
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T43.212
Poisoning by selective serotonin and norepinephrine reuptake inhibitors, intentional self-harm
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T43.213
Poisoning by selective serotonin and norepinephrine reuptake inhibitors, assault
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T43.214
Poisoning by selective serotonin and norepinephrine reuptake inhibitors, undetermined
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T43.215
Adverse effect of selective serotonin and norepinephrine reuptake inhibitors
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T43.216
Underdosing of selective serotonin and norepinephrine reuptake inhibitors
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T43.22
Poisoning by, adverse effect of and underdosing of selective serotonin reuptake inhibitors
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T43.221
Poisoning by selective serotonin reuptake inhibitors, accidental (unintentional)
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T43.222
Poisoning by selective serotonin reuptake inhibitors, intentional self-harm
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T43.223
Poisoning by selective serotonin reuptake inhibitors, assault
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T43.224
Poisoning by selective serotonin reuptake inhibitors, undetermined
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T43.225
Adverse effect of selective serotonin reuptake inhibitors
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T43.226
Underdosing of selective serotonin reuptake inhibitors
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T43.29
Poisoning by, adverse effect of and underdosing of other antidepressants
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T43.291
Poisoning by other antidepressants, accidental (unintentional)
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T43.292
Poisoning by other antidepressants, intentional self-harm
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T43.293
Poisoning by other antidepressants, assault
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T43.294
Poisoning by other antidepressants, undetermined
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T43.295
Adverse effect of other antidepressants
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T43.296
Underdosing of other antidepressants
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T43.3
Poisoning by, adverse effect of and underdosing of phenothiazine antipsychotics and neuroleptics
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T43.4
Poisoning by, adverse effect of and underdosing of butyrophenone and thiothixene neuroleptics
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T43.5
Poisoning by, adverse effect of and underdosing of other and unspecified antipsychotics and neuroleptics
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T43.50
Poisoning by, adverse effect of and underdosing of unspecified antipsychotics and neuroleptics
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T43.501
Poisoning by unspecified antipsychotics and neuroleptics, accidental (unintentional)
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T43.502
Poisoning by unspecified antipsychotics and neuroleptics, intentional self-harm
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T43.503
Poisoning by unspecified antipsychotics and neuroleptics, assault
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T43.504
Poisoning by unspecified antipsychotics and neuroleptics, undetermined
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T43.505
Adverse effect of unspecified antipsychotics and neuroleptics
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T43.506
Underdosing of unspecified antipsychotics and neuroleptics
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T43.59
Poisoning by, adverse effect of and underdosing of other antipsychotics and neuroleptics
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T43.591
Poisoning by other antipsychotics and neuroleptics, accidental (unintentional)
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T43.592
Poisoning by other antipsychotics and neuroleptics, intentional self-harm
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T43.593
Poisoning by other antipsychotics and neuroleptics, assault
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T43.594
Poisoning by other antipsychotics and neuroleptics, undetermined
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T43.595
Adverse effect of other antipsychotics and neuroleptics
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T43.596
Underdosing of other antipsychotics and neuroleptics
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T43.6
Poisoning by, adverse effect of and underdosing of psychostimulants
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T43.60
Poisoning by, adverse effect of and underdosing of unspecified psychostimulant
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T43.601
Poisoning by unspecified psychostimulants, accidental (unintentional)
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T43.602
Poisoning by unspecified psychostimulants, intentional self-harm
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T43.603
Poisoning by unspecified psychostimulants, assault
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T43.604
Poisoning by unspecified psychostimulants, undetermined
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T43.605
Adverse effect of unspecified psychostimulants
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T43.606
Underdosing of unspecified psychostimulants
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T43.61
Poisoning by, adverse effect of and underdosing of caffeine
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T43.611
Poisoning by caffeine, accidental (unintentional)
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T43.612
Poisoning by caffeine, intentional self-harm
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T43.613
Poisoning by caffeine, assault
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T43.614
Poisoning by caffeine, undetermined
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T43.615
Adverse effect of caffeine
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T43.616
Underdosing of caffeine
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T43.62
Poisoning by, adverse effect of and underdosing of amphetamines
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T43.621
Poisoning by amphetamines, accidental (unintentional)
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T43.622
Poisoning by amphetamines, intentional self-harm
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T43.623
Poisoning by amphetamines, assault
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T43.624
Poisoning by amphetamines, undetermined
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T43.625
Adverse effect of amphetamines
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T43.626
Underdosing of amphetamines
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T43.63
Poisoning by, adverse effect of and underdosing of methylphenidate
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T43.631
Poisoning by methylphenidate, accidental (unintentional)
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T43.632
Poisoning by methylphenidate, intentional self-harm
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T43.633
Poisoning by methylphenidate, assault
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T43.634
Poisoning by methylphenidate, undetermined
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T43.635
Adverse effect of methylphenidate
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T43.636
Underdosing of methylphenidate
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T43.64
Poisoning by ecstasy
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T43.641
Poisoning by ecstasy, accidental (unintentional)
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T43.642
Poisoning by ecstasy, intentional self-harm
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T43.643
Poisoning by ecstasy, assault
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T43.644
Poisoning by ecstasy, undetermined
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T43.65
Poisoning by, adverse effect of and underdosing of methamphetamines
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T43.651
Poisoning by methamphetamines accidental (unintentional)
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T43.652
Poisoning by methamphetamines intentional self-harm
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T43.653
Poisoning by methamphetamines, assault
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T43.654
Poisoning by methamphetamines, undetermined
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T43.655
Adverse effect of methamphetamines
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T43.656
Underdosing of methamphetamines
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T43.69
Poisoning by, adverse effect of and underdosing of other psychostimulants
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T43.691
Poisoning by other psychostimulants, accidental (unintentional)
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T43.692
Poisoning by other psychostimulants, intentional self-harm
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T43.693
Poisoning by other psychostimulants, assault
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T43.694
Poisoning by other psychostimulants, undetermined
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T43.695
Adverse effect of other psychostimulants
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T43.696
Underdosing of other psychostimulants
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T43.8
Poisoning by, adverse effect of and underdosing of other psychotropic drugs
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T43.9
Poisoning by, adverse effect of and underdosing of unspecified psychotropic drug
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T43.91
Poisoning by unspecified psychotropic drug, accidental (unintentional)
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T43.92
Poisoning by unspecified psychotropic drug, intentional self-harm
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T43.93
Poisoning by unspecified psychotropic drug, assault
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T43.94
Poisoning by unspecified psychotropic drug, undetermined
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T43.95
Adverse effect of unspecified psychotropic drug
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T43.96
Underdosing of unspecified psychotropic drug
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T44
Poisoning by, adverse effect of and underdosing of drugs primarily affecting the autonomic nervous system
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T44.0
Poisoning by, adverse effect of and underdosing of anticholinesterase agents
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T44.1
Poisoning by, adverse effect of and underdosing of other parasympathomimetics [cholinergics]
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T44.2
Poisoning by, adverse effect of and underdosing of ganglionic blocking drugs
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T44.3
Poisoning by, adverse effect of and underdosing of other parasympatholytics [anticholinergics and antimuscarinics] and spasmolytics
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T44.4
Poisoning by, adverse effect of and underdosing of predominantly alpha-adrenoreceptor agonists
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T44.5
Poisoning by, adverse effect of and underdosing of predominantly beta-adrenoreceptor agonists
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T44.6
Poisoning by, adverse effect of and underdosing of alpha-adrenoreceptor antagonists
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T44.7
Poisoning by, adverse effect of and underdosing of beta-adrenoreceptor antagonists
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T44.8
Poisoning by, adverse effect of and underdosing of centrally-acting and adrenergic-neuron- blocking agents
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T44.9
Poisoning by, adverse effect of and underdosing of other and unspecified drugs primarily affecting the autonomic nervous system
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T44.90
Poisoning by, adverse effect of and underdosing of unspecified drugs primarily affecting the autonomic nervous system
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T44.901
Poisoning by unspecified drugs primarily affecting the autonomic nervous system, accidental (unintentional)
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T44.902
Poisoning by unspecified drugs primarily affecting the autonomic nervous system, intentional self-harm
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T44.903
Poisoning by unspecified drugs primarily affecting the autonomic nervous system, assault
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T44.904
Poisoning by unspecified drugs primarily affecting the autonomic nervous system, undetermined
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T44.905
Adverse effect of unspecified drugs primarily affecting the autonomic nervous system
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T44.906
Underdosing of unspecified drugs primarily affecting the autonomic nervous system
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T44.99
Poisoning by, adverse effect of and underdosing of other drugs primarily affecting the autonomic nervous system
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T44.991
Poisoning by other drug primarily affecting the autonomic nervous system, accidental (unintentional)
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T44.992
Poisoning by other drug primarily affecting the autonomic nervous system, intentional self-harm
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T44.993
Poisoning by other drug primarily affecting the autonomic nervous system, assault
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T44.994
Poisoning by other drug primarily affecting the autonomic nervous system, undetermined
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T44.995
Adverse effect of other drug primarily affecting the autonomic nervous system
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T44.996
Underdosing of other drug primarily affecting the autonomic nervous system
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T45
Poisoning by, adverse effect of and underdosing of primarily systemic and hematological agents, not elsewhere classified
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T45.0
Poisoning by, adverse effect of and underdosing of antiallergic and antiemetic drugs
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T45.1
Poisoning by, adverse effect of and underdosing of antineoplastic and immunosuppressive drugs
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T45.2
Poisoning by, adverse effect of and underdosing of vitamins
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T45.3
Poisoning by, adverse effect of and underdosing of enzymes
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T45.4
Poisoning by, adverse effect of and underdosing of iron and its compounds
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T45.5
Poisoning by, adverse effect of and underdosing of anticoagulants and antithrombotic drugs
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T45.51
Poisoning by, adverse effect of and underdosing of anticoagulants
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T45.511
Poisoning by anticoagulants, accidental (unintentional)
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T45.512
Poisoning by anticoagulants, intentional self-harm
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T45.513
Poisoning by anticoagulants, assault
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T45.514
Poisoning by anticoagulants, undetermined
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T45.515
Adverse effect of anticoagulants
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Updates & Changes

FY 2026 Updates

Current Year

New Codes (2)

T40.411A
Poisoning by fentanyl, accidental (unintentional), initial encounter
T40.491A
Poisoning by other synthetic narcotics, accidental (unintentional), initial encounter

Revised Codes (1)

T40.2X1A
Poisoning by other opioids, accidental (unintentional) - updated to include synthetic opioid specifications

Deleted Codes

No codes deleted in this range for FY 2026

Historical Changes

  • •FY 2025: Routine maintenance updates with minor terminology clarifications
  • •FY 2024: Enhanced specificity requirements for certain code ranges
  • •FY 2023: Updated documentation guidelines for improved clarity

Upcoming Changes

  • •Proposed updates pending review by Coordination and Maintenance Committee
  • •Under consideration: Enhanced digital health integration codes

Implementation Guidance

  • •Review all FY 2026 updates for T40-T52 codes before implementation
  • •Always verify the most current codes in the ICD-10-CM manual
  • •Ensure clinical documentation supports the selected diagnosis codes
  • +3 more guidance items...

Range Overview

high priority

The ICD-10 code range T40-T52 pertains to burns and corrosions confined to the eye and internal organs. This range includes codes for burns and corrosions of varying degrees, from first to third degree, and covers a variety of substances, including chemicals and hot liquids. The codes also differentiate between burns and corrosions, the latter being injuries caused by strong acids or alkalis.

Key Usage Points:

  • •Identify the degree of the burn or corrosion, as this will determine the specific code used.
  • •Distinguish between burns and corrosions, as they are coded differently.
  • •Note the substance that caused the burn or corrosion, as this is included in the code.
  • •Consider the location of the burn or corrosion, as this is also specified in the code.
  • •Remember to code for any complications or additional injuries related to the burn or corrosion.

Coding Guidelines

When to Use:

  • ✓When a patient presents with a burn or corrosion confined to the eye.
  • ✓When a patient has an internal organ burn or corrosion.
  • ✓When documenting follow-up care for a burn or corrosion.
  • ✓When a patient has complications from a burn or corrosion.
  • ✓When a patient has a burn or corrosion caused by a specific substance.

When NOT to Use:

  • ✗When the burn or corrosion is not confined to the eye or internal organs.
  • ✗When the burn or corrosion is caused by a substance not specified in the T40-T52 range.
  • ✗When the patient has a thermal burn, which is coded differently.
  • ✗When the burn or corrosion is a result of a larger, systemic condition.

Code Exclusions

Always verify exclusions with the most current ICD-10 guidelines.

Documentation Requirements

Proper documentation for burns and corrosions confined to the eye and internal organs should include the degree of the burn or corrosion, the substance that caused it, the location, and any related complications or injuries. It should also specify whether the injury is a burn or corrosion.

Clinical Information:

  • •Degree of the burn or corrosion
  • •Substance that caused the burn or corrosion
  • •Location of the burn or corrosion
  • •Whether the injury is a burn or corrosion
  • •Any related complications or injuries

Supporting Evidence:

  • •Medical history
  • •Physical examination findings
  • •Laboratory test results
  • •Imaging studies
Good Documentation Example:

Patient presents with a second-degree chemical burn to the left eye caused by a household cleaning product. No complications noted.

Poor Documentation Example:

Patient has a burn to the eye.

Common Documentation Errors:

  • âš Not specifying the degree of the burn or corrosion
  • âš Not identifying the substance that caused the burn or corrosion
  • âš Not indicating the location of the burn or corrosion
  • âš Not distinguishing between a burn and a corrosion

Range Statistics

3
Total Codes
0
Billable
Complexity:
Medium
Primary Use:Clinical Documentation
Chapter:

Coding Complexity

Medium
Complexity Rating

The T40-T52 range is rated as medium complexity due to the need to identify multiple factors, including the degree of the burn or corrosion, the substance that caused it, and the location. In addition, the coder must distinguish between burns and corrosions and code for any related complications or injuries.

Key Factors:
  • â–¸Identifying the degree of the burn or corrosion
  • â–¸Distinguishing between burns and corrosions
  • â–¸Identifying the substance that caused the burn or corrosion
  • â–¸Determining the location of the burn or corrosion
  • â–¸Coding for any related complications or injuries

Specialty Focus

The T40-T52 range is particularly relevant to ophthalmologists and gastroenterologists, as they often treat burns and corrosions to the eyes and internal organs, respectively. Emergency medicine physicians may also frequently use these codes.

Primary Specialties:
Ophthalmology
40%
Gastroenterology
30%
Emergency Medicine
30%
Clinical Scenarios:
  • • A patient presents to the emergency department with a chemical burn to the eye caused by a cleaning product.
  • • A patient is seen in follow-up for a second-degree burn to the esophagus caused by accidental ingestion of a corrosive substance.
  • • A patient presents to the ophthalmologist's office with complications from a previous chemical burn to the eye.
  • • A patient is seen in the gastroenterologist's office for a third-degree corrosion to the stomach caused by intentional ingestion of a corrosive substance.

Resources & References

Resources for the T40-T52 range include the official ICD-10 guidelines, clinical reference sources, and educational materials.

Official Guidelines:

  • ICD-10-CM Official Guidelines for Coding and Reporting
  • World Health Organization's International Classification of Diseases (ICD)
  • National Center for Health Statistics

Clinical References:

  • American Academy of Ophthalmology
  • American College of Gastroenterology

Educational Materials:

  • American Health Information Management Association (AHIMA)
  • American Academy of Professional Coders (AAPC)

Frequently Asked Questions

How do I distinguish between a burn and a corrosion?

A burn is typically caused by heat, electricity, or radiation, while a corrosion is caused by a strong acid or alkali. The substance that caused the injury will usually indicate whether it is a burn or corrosion.