ICD-10-CM 2027 diagnosis code
T43.2Poisoning by, adverse effect of and underdosing of other and unspecified antidepressants
T43.2 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it and add the required 7th character.Short description: And unsp antidepressants
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About T43.2
T43.2 is the ICD-10-CM diagnosis code for poisoning by, adverse effect of and underdosing of other and unspecified antidepressants. It belongs to category T43 (poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified), block T36-T50 (poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.
Within T43, choose T43.2 (other and unspecified antidepressants) only when documentation doesn't support a more specific option: tricyclic and tetracyclic antidepressants (T43.0), monoamine-oxidase-inhibitor antidepressants (T43.1), phenothiazine antipsychotics and neuroleptics (T43.3), butyrophenone and thiothixene neuroleptics (T43.4), other and unspecified antipsychotics and neuroleptics (T43.5), psychostimulants (T43.6), other psychotropic drugs (T43.8) and unspecified psychotropic drug (T43.9).
Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
7th character
The appropriate 7th character is to be added to each code from category T43
- T43.20Poisoning by, adverse effect of and underdosing of unspecified antidepressants
- T43.201Poisoning by unspecified antidepressants, accidental (unintentional)
- T43.202Poisoning by unspecified antidepressants, intentional self-harm
- T43.203Poisoning by unspecified antidepressants, assault
- T43.204Poisoning by unspecified antidepressants, undetermined
- T43.205Adverse effect of unspecified antidepressants
- T43.206Underdosing of unspecified antidepressants
- T43.21Poisoning by, adverse effect of and underdosing of selective serotonin and norepinephrine reuptake inhibitors
- T43.211Poisoning by selective serotonin and norepinephrine reuptake inhibitors, accidental (unintentional)
- T43.212Poisoning by selective serotonin and norepinephrine reuptake inhibitors, intentional self-harm
- T43.213Poisoning by selective serotonin and norepinephrine reuptake inhibitors, assault
- T43.214Poisoning by selective serotonin and norepinephrine reuptake inhibitors, undetermined
- T43.215Adverse effect of selective serotonin and norepinephrine reuptake inhibitors
- T43.216Underdosing of selective serotonin and norepinephrine reuptake inhibitors
- T43.22Poisoning by, adverse effect of and underdosing of selective serotonin reuptake inhibitors
- T43.221Poisoning by selective serotonin reuptake inhibitors, accidental (unintentional)
- T43.222Poisoning by selective serotonin reuptake inhibitors, intentional self-harm
- T43.223Poisoning by selective serotonin reuptake inhibitors, assault
- T43.224Poisoning by selective serotonin reuptake inhibitors, undetermined
- T43.225Adverse effect of selective serotonin reuptake inhibitors
- T43.226Underdosing of selective serotonin reuptake inhibitors
- T43.29Poisoning by, adverse effect of and underdosing of other antidepressants
- T43.291Poisoning by other antidepressants, accidental (unintentional)
- T43.292Poisoning by other antidepressants, intentional self-harm
- T43.293Poisoning by other antidepressants, assault
- T43.294Poisoning by other antidepressants, undetermined
- T43.295Adverse effect of other antidepressants
- T43.296Underdosing of other antidepressants
- Ainitial encounter
- Dsubsequent encounter
- Ssequela
Notes that apply from higher levels
Instructions written at a parent level also apply to T43.2.
› From T43 Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified
Broader instructions also apply from T36-T50 Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances and Chapter 19: Injury, poisoning and certain other consequences of external causes.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about T43.2
Is T43.2 billable?
- No. T43.2 is a header code. Report one of its more specific subcodes instead.