T43.3X4
⚠ Non-billable (Header)Poisoning by phenothiazine antipsychotics and neuroleptics, undetermined
Injury, poisoning and certain other consequences of external causes (S00-T88)
⚠️ This is a category header code — not billable. Use a more specific child code below.
⚠️ Excludes2
inheritedRules inherited from parent codes.
- • appetite depressants (T50.5-)
- • barbiturates (T42.3-)
- • benzodiazepines (T42.4-)
- • drug dependence and related mental and behavioral disorders due to psychoactive substance use (F10.- -F19.-)
- • methaqualone (T42.6-)
- • psychodysleptics [hallucinogens] (T40.7-T40.9-)
Child Codes (3)
Clinical Description
ICD-10-CM code T43.3X4 represents poisoning by phenothiazine antipsychotics and neuroleptics, undetermined. This code falls under the Injury, poisoning and certain other consequences of external causes (S00-T88) classification. It is a non-billable category header code. A more specific child code from the list below must be used for billing and reimbursement purposes.
This is a 7-character code at the 6th level of specificity. There are 3 more specific child codes under T43.3X4.
Frequently Asked Questions
What is ICD-10 code T43.3X4?
ICD-10-CM code T43.3X4 is "Poisoning by phenothiazine antipsychotics and neuroleptics, undetermined". It belongs to the category: Injury, poisoning and certain other consequences of external causes (S00-T88).
Is T43.3X4 a billable ICD-10 code?
No, T43.3X4 is a non-billable header code. A more specific child code must be used for billing.
Can T43.3X4 be coded with other codes?
T43.3X4 has 6 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.
Related Codes in T43.3X
Other codes in the same category that may be relevant for differential coding:
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Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)