Poisoning by oth agents aff GI sys, undetermined, sequela

This code signifies a long-term health problem or complication resulting from an ingestion of a substance that primarily affected the gastrointestinal system, where the intent (accidental, intentional self-harm, assault) of the poisoning event cannot be determined. It indicates that the acute phase of the poisoning has passed, and the patient is now experiencing residual effects.

Apply this code when documenting a chronic condition, organ damage, or other lasting sequelae directly attributable to a past poisoning event involving a gastrointestinal agent, and the circumstances surrounding the original exposure remain unknown. This is appropriate for follow-up visits where the focus is on managing these persistent effects.

• Always use this code as a secondary diagnosis, following the code for the specific sequela (e.g., chronic gastritis, esophageal stricture).
• Ensure documentation clearly links the current condition to a past poisoning and specifies the undetermined intent.
• Do not use for acute poisoning events; those require codes from the initial encounter subcategories.