T43.022
Poisoning by tetracyclic antidepressants, intentional self-harm
Not billable — category only FY2026 2025-10-01 → 2026-09-30
Exclusions 8 never code together
T43code
Excludes1
- appetite depressants (T50.5-)T50.5-
- barbiturates (T42.3-)T42.3-
- benzodiazepines (T42.4-)T42.4-
- methaqualone (T42.6-)T42.6-
- psychodysleptics [hallucinogens] (T40.7-T40.9-)T40.7-T40.9
Excludes1 — never code together. The excluded condition and this one are mutually exclusive.
Excludes2 — not included here, but the patient may have both. Code both when documented.
7th character 3
A initial encounter
D subsequent encounter
S sequela
Instructional notes 3
S00-T88chapter
Notes
- Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
- The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.
Use additional code
- code to identify any retained foreign body, if applicable (Z18.-)Z18.-
Index entries leading here filed at null
No alphabetic index entry points at this code.
Alongside this code 5 same parent — T43.02
T43.021 Poisoning by tetracyclic antidepressants, accidental category T43.023 Poisoning by tetracyclic antidepressants, assault category T43.024 Poisoning by tetracyclic antidepressants, undetermined category T43.025 Adverse effect of tetracyclic antidepressants category T43.026 Underdosing of tetracyclic antidepressants category
Subordinate codes 3
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.