Poisoning by unsp agents aff the GI sys, undetermined, init

This code signifies a poisoning event involving an unknown substance that primarily manifests with gastrointestinal symptoms. The intent of the poisoning (e.g., accidental, intentional self-harm, assault) cannot be determined from the available documentation. This is the initial encounter for this specific poisoning episode.

Apply this code when a patient presents with symptoms like nausea, vomiting, diarrhea, or abdominal pain due to an ingested substance, but the specific agent is not identified. It is appropriate when the medical record does not clearly indicate whether the poisoning was accidental, intentional, or due to an assault. This code is used for the first time the patient is seen for this particular poisoning.

• Ensure documentation explicitly states "undetermined" intent or lacks sufficient information to assign a more specific intent.
• Only use for the initial encounter; subsequent encounters for the same poisoning would use the appropriate seventh character (e.g., D for subsequent, S for sequela).
• Avoid using if a more specific poisoning agent or intent can be identified, even if the primary symptoms are GI-related.