Poisoning by tetracyclic antidepressants, assault, init

This code signifies a case of poisoning resulting from the intentional administration or ingestion of a tetracyclic antidepressant with the intent to harm the patient. The patient is experiencing the acute effects of the substance, and this encounter represents the initial presentation for treatment.

Apply this code when a patient presents to an emergency department or clinic with symptoms of overdose due to a tetracyclic antidepressant, and the medical record clearly documents the poisoning as an assault. This code is appropriate for the first visit where the poisoning is evaluated and treated.

• Always assign an additional code for the specific tetracyclic antidepressant involved, if known (e.g., from the T43.02- subcategory).
• Remember to append a seventh character for subsequent encounters (D) or sequela (S) as appropriate for follow-up care.
• Do not use this code for accidental poisoning or self-harm; specific codes exist for those scenarios.