Poisn by multiple unsp drug/meds/biol subst, self-harm, init

This code signifies a patient presenting with adverse effects from intentionally self-administering multiple, unidentifiable drugs, medications, or biological substances. The intent is self-harm, and this encounter represents the initial treatment for the poisoning. The specific substances involved are not documented or are unknown.

Apply this code when a patient is admitted or seen in the emergency department due to an overdose involving several different substances, and the patient explicitly states or clinical evidence strongly suggests the overdose was an attempt at self-harm. This is appropriate when the exact drugs or biological substances taken are not yet identified or are broadly categorized as "multiple unspecified." Use for the first time the patient is seen for this specific poisoning event.

• Ensure documentation clearly indicates "intentional self-harm" and "multiple unspecified substances."
• Always assign an additional code for the specific adverse effect(s) or manifestation(s) of the poisoning.
• Do not use if specific substances are known and can be coded individually (e.g., poisoning by specific opioids and benzodiazepines).