Poisoning by unsp drug/meds/biol subst, undetermined, init

This code signifies a patient presenting with adverse effects from an unknown drug, medication, or biological substance, where the intent (e.g., accidental, intentional self-harm, assault) cannot be determined. It indicates the initial phase of treatment for this poisoning event.

Use this code when a patient exhibits symptoms of poisoning, and the specific substance involved is not yet identified, or the intent of the exposure is unclear after initial assessment. This is appropriate for the first visit or admission related to this particular poisoning episode.

• Ensure documentation clearly states that the substance is unspecified and the intent is undetermined.
• Only use the "A" (initial encounter) seventh character for the very first encounter for this poisoning.
• Avoid using this code if the substance or intent is known; instead, use more specific codes.