Poisoning by enzymes, undetermined, initial encounter

This code signifies an adverse event resulting from exposure to enzymes, where the intent (e.g., accidental, intentional self-harm, assault) cannot be determined. The patient is receiving active treatment for the poisoning.

Apply this code when a patient presents with symptoms of enzyme poisoning, and documentation does not specify whether the exposure was accidental, intentional, or due to assault. This is appropriate for the initial visit where the poisoning is being actively managed.

• Requires a fifth character of 'A' for initial encounter. Subsequent encounters will use 'D' or 'S'.
• Always sequence this code first if it is the primary reason for the encounter.
• Do not use if the intent of the poisoning is clearly documented (e.g., accidental, intentional self-harm).