Underdosing of anthelminthics, sequela

This code indicates a long-term or residual effect stemming from the insufficient administration of an anthelminthic medication. It signifies that the patient experienced an underdosing of a drug used to treat parasitic worm infections, and this inadequate treatment has led to a persistent health problem or complication.

Use this code when documenting a patient presenting with a chronic condition or lasting symptom directly attributable to a past, incomplete, or insufficient course of anthelminthic therapy. This applies to situations where the initial underdosing event is no longer active, but its consequences are still being managed. For example, a patient with persistent organ damage from a parasitic infection due to an anthelminthic underdosing months prior.

• Always sequence this code after the code(s) for the specific sequela (e.g., the chronic parasitic infection or organ damage).
• Do not use this code for active underdosing; use the appropriate acute underdosing code for ongoing situations.
• Ensure documentation clearly links the current condition to the past underdosing event.