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

This code signifies a poisoning event involving an unknown substance that primarily impacts the digestive system, where the intent (e.g., accidental, intentional self-harm) cannot be determined. The patient is receiving follow-up care for the sequelae or ongoing management of this poisoning.

Apply this code when a patient presents for subsequent treatment or monitoring related to a previously diagnosed poisoning of the gastrointestinal system, and the specific toxic agent remains unidentified. This is appropriate when the initial encounter for the poisoning has already occurred, and the intent of the poisoning is still unclear.

• Always sequence this code after the primary diagnosis for the specific GI manifestation (e.g., gastritis, enteritis) if applicable.
• Ensure documentation clearly supports the "subsequent encounter" status, indicating ongoing care for the poisoning.
• Avoid using this code if the specific agent is known or if the intent of the poisoning has been determined (e.g., accidental, intentional).