Adverse effect of agents primarily affecting GI sys, sequela

This code signifies a long-term or residual health problem that arose from a previous adverse reaction to a substance primarily impacting the digestive system. This means the initial adverse effect has resolved, but its lasting consequences are still present and require ongoing management.

Apply this code when documenting a patient presenting with a chronic gastrointestinal condition, such as persistent malabsorption, chronic diarrhea, or irritable bowel syndrome-like symptoms, that is directly attributed to a past adverse drug reaction or exposure to another agent affecting the GI tract. This code is appropriate for follow-up encounters where the sequela is being treated or monitored.

• Always sequence this code after the code for the specific sequela (e.g., K90.0 for celiac disease if it's a sequela of a drug).
• Ensure documentation clearly links the current GI condition to a past adverse effect, not an acute one.
• Verify the "S" seventh character is appropriate for sequela, indicating the long-term nature of the condition.