T43.9 — Poisoning by, adverse effect of and underdosing of unspecified psychotropic drug
Is T43.9 billable?
No — T43.9 is a non-billable header code. T43.9 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 18 billable codes beneath T43.9.
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
T43.9 at a glance
| Code | T43.9 |
|---|---|
| Description | Poisoning by, adverse effect of and underdosing of unspecified psychotropic drug |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes1 — never code together — inherited from T36-T50
The conditions below can never be reported together with T43.9 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 T43.9. T43.9 describes a manifestation and cannot be the principal or first-listed diagnosis.
Use additional code — inherited from Chapter 19
Report an additional code alongside T43.9 to fully describe the condition. T43.9 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 T43.9 to fully describe the condition. T43.9 is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T43.9, but a patient may have both at the same time. When documentation supports it, T43.9 and the excluded code may both be reported.
Excludes2 — not included here — inherited from T36-T50
The conditions below are not part of T43.9, but a patient may have both at the same time. When documentation supports it, T43.9 and the excluded code may both be reported.
Excludes2 — not included here — inherited from T43
The conditions below are not part of T43.9, but a patient may have both at the same time. When documentation supports it, T43.9 and the excluded code may both be reported.
What codes fall under T43.9? (6)
- T43.91Poisoning by unspecified psychotropic drug, accidental (unintentional)not billable
- T43.92Poisoning by unspecified psychotropic drug, intentional self-harmnot billable
- T43.93Poisoning by unspecified psychotropic drug, assaultnot billable
- T43.94Poisoning by unspecified psychotropic drug, undeterminednot billable
- T43.95Adverse effect of unspecified psychotropic drugnot billable
- T43.96Underdosing of unspecified psychotropic drugnot billable
How long has T43.9 existed?
T43.9 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.
What other codes are in the T43 family? (8)
- 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