Poisoning by tetracyclic antidepressants, accidental, init

This code signifies an adverse health event resulting from an accidental overdose or unintended exposure to a tetracyclic antidepressant medication. The patient is experiencing the initial effects of the poisoning, which can manifest in various systemic symptoms depending on the specific drug and dosage.

Apply this code when a patient presents to an emergency department or clinic with symptoms of poisoning due to an accidental ingestion or misadministration of a tetracyclic antidepressant. This is appropriate for the initial visit where the poisoning is first diagnosed and treatment is initiated.

• Ensure documentation clearly states the poisoning was accidental and not intentional self-harm.
• Confirm the antidepressant involved is specifically a tetracyclic type.
• This "A" seventh character indicates the initial encounter for this condition, regardless of subsequent visits for the same poisoning episode.