Poisoning by barbiturates, assault, initial encounter

This code signifies an acute adverse reaction resulting from the intentional administration of barbiturates by another person with the intent to harm. The patient is experiencing the initial effects of this poisoning, which can manifest as central nervous system depression, respiratory compromise, or cardiovascular instability. This is not an accidental overdose or a therapeutic misadventure.

Apply this code when documentation clearly indicates that a patient's barbiturate poisoning was the result of an assault. This includes situations where the drug was forcibly administered, covertly given, or used to incapacitate the patient by another individual. This code is appropriate for the initial presentation and treatment of the poisoning.

• Always verify the intent of the poisoning; "assault" must be explicitly documented or clearly inferred from the clinical context.
• Remember to also code any specific manifestations of the poisoning, such as coma (R40.2-) or respiratory depression (R06.89).
• This "A" seventh character indicates an initial encounter, meaning the patient is receiving active treatment for the condition.