T43.02 — Poisoning by, adverse effect of and underdosing of tetracyclic antidepressants
Is T43.02 billable?
No — T43.02 is a non-billable header code. T43.02 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 T43.02.
Billable codes under this header
- 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
T43.02 at a glance
| Code | T43.02 |
|---|---|
| Description | Poisoning by, adverse effect of and underdosing of tetracyclic antidepressants |
| 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 T43.02 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 T43.02. T43.02 describes a manifestation and cannot be the principal or first-listed diagnosis.
Use additional code — inherited from Chapter 19
Report an additional code alongside T43.02 to fully describe the condition. T43.02 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 T43.02 to fully describe the condition. T43.02 is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T43.02, but a patient may have both at the same time. When documentation supports it, T43.02 and the excluded code may both be reported.
Excludes2 — not included here — inherited from T36-T50
The conditions below are not part of T43.02, but a patient may have both at the same time. When documentation supports it, T43.02 and the excluded code may both be reported.
Excludes2 — not included here — inherited from T43
The conditions below are not part of T43.02, but a patient may have both at the same time. When documentation supports it, T43.02 and the excluded code may both be reported.
What codes fall under T43.02? (6)
- T43.021Poisoning by tetracyclic antidepressants, accidental (unintentional)not billable
- T43.022Poisoning by tetracyclic antidepressants, intentional self-harmnot billable
- T43.023Poisoning by tetracyclic antidepressants, assaultnot billable
- T43.024Poisoning by tetracyclic antidepressants, undeterminednot billable
- T43.025Adverse effect of tetracyclic antidepressantsnot billable
- T43.026Underdosing of tetracyclic antidepressantsnot billable
How long has T43.02 existed?
T43.02 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.