Poisoning by tricyclic antidepressants, undetermined, init

This code signifies a patient presenting with adverse effects from tricyclic antidepressant exposure where the intent (e.g., accidental, intentional self-harm, assault) cannot be determined. The patient is receiving initial treatment for the poisoning.

Apply this code when documentation indicates a patient has ingested or been exposed to tricyclic antidepressants, resulting in toxic effects, and the provider cannot definitively state whether the exposure was accidental, intentional, or due to assault. This is appropriate for the first encounter for this specific poisoning event.

• Ensure documentation explicitly states "undetermined" intent for the poisoning.
• Pair with codes for specific manifestations of the poisoning (e.g., cardiac arrhythmias, seizures).
• Do not use for adverse effects of properly administered tricyclic antidepressants; refer to adverse effect codes.