Poisoning by phenothiaz antipsychot/neurolept, assault, init

This code signifies a patient presenting with adverse effects from phenothiazine antipsychotics or other neuroleptics, specifically when the exposure was intentionally inflicted by another person. The patient is in the acute phase of treatment for this poisoning.

Apply this code when documentation clearly indicates a patient has been poisoned by a phenothiazine or neuroleptic drug due to an assault. This would include scenarios where a substance was forcibly administered or covertly given with malicious intent. It is used for the initial visit related to this specific poisoning event.

• Always sequence this code first when it is the primary reason for the encounter.
• Requires external cause codes (e.g., Y09.-) to fully describe the circumstances of the assault.
• Ensure documentation specifies "assault" and "initial encounter" for accurate code assignment.