Underdosing of agents primarily affecting GI sys, sequela

This code signifies a long-term health problem or condition that has developed as a direct result of a patient receiving insufficient amounts of medication or substances primarily intended to treat gastrointestinal issues. It indicates that the underdosing event itself is no longer active, but its lasting consequences are now being addressed.

Apply this code when documenting a chronic or residual condition, such as persistent malabsorption, chronic constipation, or recurrent ulcers, that is directly attributable to a past instance of inadequate dosing of a GI-specific agent. This code is appropriate when the patient is being treated for the sequela, not the acute underdosing event.

• Always sequence this code after the code for the specific sequela (e.g., K90.0 for celiac disease with malabsorption).
• Ensure documentation clearly links the current condition to a previous underdosing of a GI agent.
• Do not use for acute underdosing events; those require codes from the T36-T50 range with a 6th character of '1' or '2'.