Poisoning by MAO inhib antidepressants, undetermined, init

This code signifies a patient presenting with adverse effects from monoamine oxidase inhibitor (MAOI) antidepressants, where the intent of the poisoning (e.g., accidental, intentional self-harm, assault) cannot be determined at the time of the initial encounter. The patient is experiencing symptoms directly attributable to the MAOI, requiring medical attention.

Apply this code when a patient arrives at an emergency department or clinic with signs and symptoms of MAOI toxicity, and the healthcare provider cannot definitively ascertain whether the exposure was accidental, intentional, or due to an assault. This code is appropriate for the very first time the patient is seen for this specific poisoning event.

• Ensure documentation clearly states "undetermined" intent for the poisoning.
• Pair with codes for specific manifestations of the poisoning (e.g., serotonin syndrome, hypertensive crisis).
• Only use the "A" seventh character for the initial encounter for this specific poisoning event.