Poisoning by peripheral vasodilators, undetermined, init

This code signifies a patient presenting with adverse effects from peripheral vasodilators, where the intent (accidental, intentional self-harm, assault) of the poisoning cannot be determined. The patient is in the initial phase of treatment for this poisoning event.

Apply this code when a patient experiences toxic effects from peripheral vasodilators, and documentation does not clearly specify whether the exposure was accidental, intentional, or due to assault. This is appropriate for the first encounter related to this specific poisoning.

• Requires additional codes for specific manifestations of the poisoning.
• Only use the "A" seventh character for the initial encounter; subsequent care would use "D" or "S".
• Ensure documentation explicitly states "undetermined" intent for peripheral vasodilator poisoning.