Underdosing of antiallergic and antiemetic drugs, subs

This code signifies that a patient has experienced an adverse effect due to taking less than the prescribed or recommended dose of medication intended to treat allergies or nausea/vomiting. This underdosing has led to a negative health outcome or a worsening of their condition.

Apply this code when documenting a patient visit where the underdosing of an antiallergic or antiemetic drug is identified as the cause of their current symptoms or treatment failure, and this is not the initial encounter for this specific underdosing event. This is appropriate for follow-up visits where the underdosing issue is being managed or evaluated further.

• Always use an additional code to specify the nature of the adverse effect or the condition being treated.
• Ensure documentation clearly states the medication involved and that the patient took less than the prescribed amount.
• This "D" seventh character indicates a subsequent encounter, meaning the patient is receiving routine care during the healing or recovery phase.