T43 — Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified
Not billable
Is T43 billable?
No — T43 is a non-billable header code. T43 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 60 billable codes beneath T43.
Billable codes under this header
- T43.91XAPoisoning by unspecified psychotropic drug, accidental (unintentional), initial encounter
- T43.91XDPoisoning by unspecified psychotropic drug, accidental (unintentional), subsequent encounter
- T43.91XSPoisoning by unspecified psychotropic drug, accidental (unintentional), sequela
- T43.92XAPoisoning by unspecified psychotropic drug, intentional self-harm, initial encounter
- T43.92XDPoisoning by unspecified psychotropic drug, intentional self-harm, subsequent encounter
- T43.92XSPoisoning by unspecified psychotropic drug, intentional self-harm, sequela
- T43.93XAPoisoning by unspecified psychotropic drug, assault, initial encounter
- T43.93XDPoisoning by unspecified psychotropic drug, assault, subsequent encounter
- T43.93XSPoisoning by unspecified psychotropic drug, assault, sequela
- T43.94XAPoisoning by unspecified psychotropic drug, undetermined, initial encounter
- T43.94XDPoisoning by unspecified psychotropic drug, undetermined, subsequent encounter
- T43.94XSPoisoning by unspecified psychotropic drug, undetermined, sequela
- T43.95XAAdverse effect of unspecified psychotropic drug, initial encounter
- T43.95XDAdverse effect of unspecified psychotropic drug, subsequent encounter
- T43.95XSAdverse effect of unspecified psychotropic drug, sequela
- T43.96XAUnderdosing of unspecified psychotropic drug, initial encounter
- T43.96XDUnderdosing of unspecified psychotropic drug, subsequent encounter
- T43.96XSUnderdosing of unspecified psychotropic drug, sequela
- T43.011APoisoning by tricyclic antidepressants, accidental (unintentional), initial encounter
- T43.011DPoisoning by tricyclic antidepressants, accidental (unintentional), subsequent encounter
- T43.011SPoisoning by tricyclic antidepressants, accidental (unintentional), sequela
- T43.012APoisoning by tricyclic antidepressants, intentional self-harm, initial encounter
- T43.012DPoisoning by tricyclic antidepressants, intentional self-harm, subsequent encounter
- T43.012SPoisoning by tricyclic antidepressants, intentional self-harm, sequela
- T43.013APoisoning by tricyclic antidepressants, assault, initial encounter
- T43.013DPoisoning by tricyclic antidepressants, assault, subsequent encounter
- T43.013SPoisoning by tricyclic antidepressants, assault, sequela
- T43.014APoisoning by tricyclic antidepressants, undetermined, initial encounter
- T43.014DPoisoning by tricyclic antidepressants, undetermined, subsequent encounter
- T43.014SPoisoning by tricyclic antidepressants, undetermined, sequela
- T43.015AAdverse effect of tricyclic antidepressants, initial encounter
- T43.015DAdverse effect of tricyclic antidepressants, subsequent encounter
- T43.015SAdverse effect of tricyclic antidepressants, sequela
- T43.016AUnderdosing of tricyclic antidepressants, initial encounter
- T43.016DUnderdosing of tricyclic antidepressants, subsequent encounter
- T43.016SUnderdosing of tricyclic antidepressants, sequela
- T43.021APoisoning by tetracyclic antidepressants, accidental (unintentional), initial encounter
- T43.021DPoisoning by tetracyclic antidepressants, accidental (unintentional), subsequent encounter
- T43.021SPoisoning by tetracyclic antidepressants, accidental (unintentional), sequela
- T43.022APoisoning by tetracyclic antidepressants, intentional self-harm, initial encounter
- T43.022DPoisoning by tetracyclic antidepressants, intentional self-harm, subsequent encounter
- T43.022SPoisoning by tetracyclic antidepressants, intentional self-harm, sequela
- T43.023APoisoning by tetracyclic antidepressants, assault, initial encounter
- T43.023DPoisoning by tetracyclic antidepressants, assault, subsequent encounter
- T43.023SPoisoning by tetracyclic antidepressants, assault, sequela
- T43.024APoisoning by tetracyclic antidepressants, undetermined, initial encounter
- T43.024DPoisoning by tetracyclic antidepressants, undetermined, subsequent encounter
- T43.024SPoisoning by tetracyclic antidepressants, undetermined, sequela
- T43.025AAdverse effect of tetracyclic antidepressants, initial encounter
- T43.025DAdverse effect of tetracyclic antidepressants, subsequent encounter
- T43.025SAdverse effect of tetracyclic antidepressants, sequela
- T43.026AUnderdosing of tetracyclic antidepressants, initial encounter
- T43.026DUnderdosing of tetracyclic antidepressants, subsequent encounter
- T43.026SUnderdosing of tetracyclic antidepressants, sequela
- T43.1X1APoisoning by monoamine-oxidase-inhibitor antidepressants, accidental (unintentional), initial encounter
- T43.1X1DPoisoning by monoamine-oxidase-inhibitor antidepressants, accidental (unintentional), subsequent encounter
- T43.1X1SPoisoning by monoamine-oxidase-inhibitor antidepressants, accidental (unintentional), sequela
- T43.1X2APoisoning by monoamine-oxidase-inhibitor antidepressants, intentional self-harm, initial encounter
- T43.1X2DPoisoning by monoamine-oxidase-inhibitor antidepressants, intentional self-harm, subsequent encounter
- T43.1X2SPoisoning by monoamine-oxidase-inhibitor antidepressants, intentional self-harm, sequela
T43 at a glance
| Code | T43 |
|---|---|
| Description | Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes2 — not included here
The conditions below are not part of T43, but a patient may have both at the same time. When documentation supports it, T43 and the excluded code may both be reported.
Excludes1 — never code together — inherited from T36-T50
The conditions below can never be reported together with T43 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- toxic reaction to local anesthesia in pregnancy (O29.3-)
Code first — inherited from T36-T50
The underlying condition below must be sequenced before T43. T43 describes a manifestation and cannot be the principal or first-listed diagnosis.
Use additional code — inherited from Chapter 19
Report an additional code alongside T43 to fully describe the condition. T43 is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Use additional code — inherited from T36-T50
Report an additional code alongside T43 to fully describe the condition. T43 is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T43, but a patient may have both at the same time. When documentation supports it, T43 and the excluded code may both be reported.
Excludes2 — not included here — inherited from T36-T50
The conditions below are not part of T43, but a patient may have both at the same time. When documentation supports it, T43 and the excluded code may both be reported.
What codes fall under T43? (9)
- T43.0Poisoning by, adverse effect of and underdosing of tricyclic and tetracyclic antidepressantsnot billable
- T43.1Poisoning by, adverse effect of and underdosing of monoamine-oxidase-inhibitor antidepressantsnot billable
- T43.2Poisoning by, adverse effect of and underdosing of other and unspecified antidepressantsnot billable
- T43.3Poisoning by, adverse effect of and underdosing of phenothiazine antipsychotics and neurolepticsnot billable
- T43.4Poisoning by, adverse effect of and underdosing of butyrophenone and thiothixene neurolepticsnot billable
- T43.5Poisoning by, adverse effect of and underdosing of other and unspecified antipsychotics and neurolepticsnot billable
- T43.6Poisoning by, adverse effect of and underdosing of psychostimulantsnot billable
- T43.8Poisoning by, adverse effect of and underdosing of other psychotropic drugsnot billable
- T43.9Poisoning by, adverse effect of and underdosing of unspecified psychotropic drugnot billable
How long has T43 existed?
T43 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.