Poisoning by heroin, undetermined, initial encounter

This code signifies an adverse health event resulting from heroin exposure where the intent (e.g., accidental, intentional self-harm, assault) cannot be determined from the available documentation. It specifically applies to the initial phase of treatment for such a poisoning.

Use this code for emergency department visits or initial hospital admissions where a patient presents with symptoms of heroin toxicity, and the medical record does not clearly state whether the exposure was accidental, intentional, or due to assault. This code is appropriate when the patient is receiving active treatment for the acute effects of the poisoning.

• Requires documentation explicitly stating "undetermined" intent for the heroin poisoning.
• The "A" seventh character indicates the patient is receiving active treatment for the poisoning.
• Always sequence this code first, followed by codes for any associated manifestations or complications of the poisoning.