T43 Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified

⚠ Non-Billable ICD-10-CM 2026
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The ICD-10-CM code for Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified is T43 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Section
T36-T50: Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50)
Category T43
147 codes (118 billable)
FY2026 Status
Stable since FY2024
Excludes2
Not included here. These conditions are coded elsewhere but may be coded together if applicable.
  • appetite depressants (T50.5-)
  • barbiturates (T42.3-)
  • benzodiazepines (T42.4-)
  • drug dependence and related mental and behavioral disorders due to psychoactive substance use (F10.- -F19.-)
  • methaqualone (T42.6-)
  • psychodysleptics [hallucinogens] (T40.7-T40.9-)

Official Coding Guidelines

Sequence blood vessel/nerve injury first (fragment)

injury is to the blood vessels or nerves, that injury should be sequenced first.

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.19.b.2
Do not assign injury codes for iatrogenic injuries; code complication

3) Iatrogenic injuries Injury codes from Chapter 19 should not be assigned for injuries that occur during, or as a result of, a medical intervention. Assign the appropriate complication code(s).

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.19.b.3

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Cite This Page

Reference T43 with the canonical source and edition:

T43 — Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/T43

Canonical URL: https://icd10codingpro.com/codes/T43

Related Codes

All Codes in T43

Every most-specific code under T43 Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified (118 codes):

Show the complete T43 code list
T43.011 Poisoning by tricyclic antidepressants, accidental (unintentional) T43.012 Poisoning by tricyclic antidepressants, intentional self-harm T43.013 Poisoning by tricyclic antidepressants, assault T43.014 Poisoning by tricyclic antidepressants, undetermined T43.015 Adverse effect of tricyclic antidepressants T43.016 Underdosing of tricyclic antidepressants T43.021 Poisoning by tetracyclic antidepressants, accidental (unintentional) T43.022 Poisoning by tetracyclic antidepressants, intentional self-harm T43.023 Poisoning by tetracyclic antidepressants, assault T43.024 Poisoning by tetracyclic antidepressants, undetermined T43.025 Adverse effect of tetracyclic antidepressants T43.026 Underdosing of tetracyclic antidepressants T43.1X1 Poisoning by monoamine-oxidase-inhibitor antidepressants, accidental (unintentional) T43.1X2 Poisoning by monoamine-oxidase-inhibitor antidepressants, intentional self-harm T43.1X3 Poisoning by monoamine-oxidase-inhibitor antidepressants, assault T43.1X4 Poisoning by monoamine-oxidase-inhibitor antidepressants, undetermined T43.1X5 Adverse effect of monoamine-oxidase-inhibitor antidepressants T43.1X6 Underdosing of monoamine-oxidase-inhibitor antidepressants T43.201 Poisoning by unspecified antidepressants, accidental (unintentional) T43.202 Poisoning by unspecified antidepressants, intentional self-harm T43.203 Poisoning by unspecified antidepressants, assault T43.204 Poisoning by unspecified antidepressants, undetermined T43.205 Adverse effect of unspecified antidepressants T43.206 Underdosing of unspecified antidepressants T43.211 Poisoning by selective serotonin and norepinephrine reuptake inhibitors, accidental (unintentional) T43.212 Poisoning by selective serotonin and norepinephrine reuptake inhibitors, intentional self-harm T43.213 Poisoning by selective serotonin and norepinephrine reuptake inhibitors, assault T43.214 Poisoning by selective serotonin and norepinephrine reuptake inhibitors, undetermined T43.215 Adverse effect of selective serotonin and norepinephrine reuptake inhibitors T43.216 Underdosing of selective serotonin and norepinephrine reuptake inhibitors T43.221 Poisoning by selective serotonin reuptake inhibitors, accidental (unintentional) T43.222 Poisoning by selective serotonin reuptake inhibitors, intentional self-harm T43.223 Poisoning by selective serotonin reuptake inhibitors, assault T43.224 Poisoning by selective serotonin reuptake inhibitors, undetermined T43.225 Adverse effect of selective serotonin reuptake inhibitors T43.226 Underdosing of selective serotonin reuptake inhibitors T43.291 Poisoning by other antidepressants, accidental (unintentional) T43.292 Poisoning by other antidepressants, intentional self-harm T43.293 Poisoning by other antidepressants, assault T43.294 Poisoning by other antidepressants, undetermined T43.295 Adverse effect of other antidepressants T43.296 Underdosing of other antidepressants T43.3X1 Poisoning by phenothiazine antipsychotics and neuroleptics, accidental (unintentional) T43.3X2 Poisoning by phenothiazine antipsychotics and neuroleptics, intentional self-harm T43.3X3 Poisoning by phenothiazine antipsychotics and neuroleptics, assault T43.3X4 Poisoning by phenothiazine antipsychotics and neuroleptics, undetermined T43.3X5 Adverse effect of phenothiazine antipsychotics and neuroleptics T43.3X6 Underdosing of phenothiazine antipsychotics and neuroleptics T43.4X1 Poisoning by butyrophenone and thiothixene neuroleptics, accidental (unintentional) T43.4X2 Poisoning by butyrophenone and thiothixene neuroleptics, intentional self-harm T43.4X3 Poisoning by butyrophenone and thiothixene neuroleptics, assault T43.4X4 Poisoning by butyrophenone and thiothixene neuroleptics, undetermined T43.4X5 Adverse effect of butyrophenone and thiothixene neuroleptics T43.4X6 Underdosing of butyrophenone and thiothixene neuroleptics T43.501 Poisoning by unspecified antipsychotics and neuroleptics, accidental (unintentional) T43.502 Poisoning by unspecified antipsychotics and neuroleptics, intentional self-harm T43.503 Poisoning by unspecified antipsychotics and neuroleptics, assault T43.504 Poisoning by unspecified antipsychotics and neuroleptics, undetermined T43.505 Adverse effect of unspecified antipsychotics and neuroleptics T43.506 Underdosing of unspecified antipsychotics and neuroleptics T43.591 Poisoning by other antipsychotics and neuroleptics, accidental (unintentional) T43.592 Poisoning by other antipsychotics and neuroleptics, intentional self-harm T43.593 Poisoning by other antipsychotics and neuroleptics, assault T43.594 Poisoning by other antipsychotics and neuroleptics, undetermined T43.595 Adverse effect of other antipsychotics and neuroleptics T43.596 Underdosing of other antipsychotics and neuroleptics T43.601 Poisoning by unspecified psychostimulants, accidental (unintentional) T43.602 Poisoning by unspecified psychostimulants, intentional self-harm T43.603 Poisoning by unspecified psychostimulants, assault T43.604 Poisoning by unspecified psychostimulants, undetermined T43.605 Adverse effect of unspecified psychostimulants T43.606 Underdosing of unspecified psychostimulants T43.611 Poisoning by caffeine, accidental (unintentional) T43.612 Poisoning by caffeine, intentional self-harm T43.613 Poisoning by caffeine, assault T43.614 Poisoning by caffeine, undetermined T43.615 Adverse effect of caffeine T43.616 Underdosing of caffeine T43.621 Poisoning by amphetamines, accidental (unintentional) T43.622 Poisoning by amphetamines, intentional self-harm T43.623 Poisoning by amphetamines, assault T43.624 Poisoning by amphetamines, undetermined T43.625 Adverse effect of amphetamines T43.626 Underdosing of amphetamines T43.631 Poisoning by methylphenidate, accidental (unintentional) T43.632 Poisoning by methylphenidate, intentional self-harm T43.633 Poisoning by methylphenidate, assault T43.634 Poisoning by methylphenidate, undetermined T43.635 Adverse effect of methylphenidate T43.636 Underdosing of methylphenidate T43.641 Poisoning by ecstasy, accidental (unintentional) T43.642 Poisoning by ecstasy, intentional self-harm T43.643 Poisoning by ecstasy, assault T43.644 Poisoning by ecstasy, undetermined T43.651 Poisoning by methamphetamines accidental (unintentional) T43.652 Poisoning by methamphetamines intentional self-harm T43.653 Poisoning by methamphetamines, assault T43.654 Poisoning by methamphetamines, undetermined T43.655 Adverse effect of methamphetamines T43.656 Underdosing of methamphetamines T43.691 Poisoning by other psychostimulants, accidental (unintentional) T43.692 Poisoning by other psychostimulants, intentional self-harm T43.693 Poisoning by other psychostimulants, assault T43.694 Poisoning by other psychostimulants, undetermined T43.695 Adverse effect of other psychostimulants T43.696 Underdosing of other psychostimulants T43.8X1 Poisoning by other psychotropic drugs, accidental (unintentional) T43.8X2 Poisoning by other psychotropic drugs, intentional self-harm T43.8X3 Poisoning by other psychotropic drugs, assault T43.8X4 Poisoning by other psychotropic drugs, undetermined T43.8X5 Adverse effect of other psychotropic drugs T43.8X6 Underdosing of other psychotropic drugs T43.91 Poisoning by unspecified psychotropic drug, accidental (unintentional) T43.92 Poisoning by unspecified psychotropic drug, intentional self-harm T43.93 Poisoning by unspecified psychotropic drug, assault T43.94 Poisoning by unspecified psychotropic drug, undetermined T43.95 Adverse effect of unspecified psychotropic drug T43.96 Underdosing of unspecified psychotropic drug
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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