Poisoning by unsp agents aff the GI sys, assault, sequela

This code signifies a long-term health problem or complication resulting from an intentional act of poisoning with an unknown substance that primarily impacted the digestive system. The initial poisoning event is in the past, and the patient is now presenting with residual effects.

Apply this code when documenting a sequela (e.g., chronic gastritis, malabsorption, esophageal stricture) directly attributable to a past assault involving an unspecified gastrointestinal toxin. This is appropriate when the acute phase of the poisoning has resolved, and the current encounter addresses the lasting consequences.

• Ensure documentation clearly links the current gastrointestinal condition to a past poisoning assault.
• Only use the "S" (sequela) seventh character when the acute phase of the poisoning has passed.
• Avoid this code if the specific toxic agent is known or if the poisoning was accidental or self-harm.