T43.016 — Underdosing of tricyclic antidepressants
Is T43.016 billable?
No — T43.016 is a non-billable header code. T43.016 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 3 billable codes beneath T43.016.
T43.016 at a glance
| Code | T43.016 |
|---|---|
| Description | Underdosing of tricyclic 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 T43.016 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 T43.016. T43.016 describes a manifestation and cannot be the principal or first-listed diagnosis.
Use additional code — inherited from Chapter 19
Report an additional code alongside T43.016 to fully describe the condition. T43.016 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 T43.016 to fully describe the condition. T43.016 is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T43.016, but a patient may have both at the same time. When documentation supports it, T43.016 and the excluded code may both be reported.
Excludes2 — not included here — inherited from T36-T50
The conditions below are not part of T43.016, but a patient may have both at the same time. When documentation supports it, T43.016 and the excluded code may both be reported.
Excludes2 — not included here — inherited from T43
The conditions below are not part of T43.016, but a patient may have both at the same time. When documentation supports it, T43.016 and the excluded code may both be reported.
What codes fall under T43.016? (3)
How long has T43.016 existed?
T43.016 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 T43.01 family? (5)
- T43.011Poisoning by tricyclic antidepressants, accidental (unintentional)not billable
- T43.012Poisoning by tricyclic antidepressants, intentional self-harmnot billable
- T43.013Poisoning by tricyclic antidepressants, assaultnot billable
- T43.014Poisoning by tricyclic antidepressants, undeterminednot billable
- T43.015Adverse effect of tricyclic antidepressantsnot billable