T43 ICD-10-CM Code: Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
T43Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified
ICD-10-CM diagnosis code · United States clinical modification
Where T43 sits
- 1
Chapter 19
Injury, poisoning and certain other consequences of external causes (S00-T88)
- 2
Section
Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50)
- 3
Category T43
Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified
- 4
Code T43
Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified
Codes under T43
T43 is a non-billable category. Choose the child code that best matches the documented diagnosis.
T43.0Poisoning by, adverse effect of and underdosing of tricyclic and tetracyclic antidepressantsT43.1Poisoning by, adverse effect of and underdosing of monoamine-oxidase-inhibitor antidepressantsT43.2Poisoning by, adverse effect of and underdosing of other and unspecified antidepressantsT43.3Poisoning by, adverse effect of and underdosing of phenothiazine antipsychotics and neurolepticsT43.4Poisoning by, adverse effect of and underdosing of butyrophenone and thiothixene neurolepticsT43.5Poisoning by, adverse effect of and underdosing of other and unspecified antipsychotics and neurolepticsT43.6Poisoning by, adverse effect of and underdosing of psychostimulantsT43.8Poisoning by, adverse effect of and underdosing of other psychotropic drugsT43.9Poisoning by, adverse effect of and underdosing of unspecified psychotropic drugNotes for this code
Inclusion terms
No inclusion terms are listed for T43.
Code first
No “code first” instruction is listed for T43.
Use additional code
No “use additional code” instruction is listed for T43.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for T43.
Excludes2
Conditions not included here that may be reported separately when present.
- 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-)
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code T43 mean?
T43 is the FY 2027 U.S. ICD-10-CM code for “Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified.”
Is T43 a billable or specific ICD-10-CM code?
No. T43 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is T43 located in ICD-10-CM?
T43 is listed in Chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88), within Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50) (T36–T50), under category T43, Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified.
What coding notes are listed for T43?
No inclusion terms are listed for T43 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. Excludes2 notes: 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-).