Underdosing of other antidysrhythmic drugs, init encntr

This code indicates a patient has taken less than the prescribed amount of an antidysrhythmic medication, leading to an adverse effect or exacerbation of their cardiac arrhythmia. This underdosing is the primary reason for the current encounter and is not due to a physician's decision to reduce the dosage.

Apply this code when a patient presents with symptoms related to their cardiac arrhythmia because they have not taken their antiarrhythmic medication as directed. This includes situations where the patient intentionally or unintentionally took too little of the drug, and this is the initial presentation for this specific underdosing event.

• Remember to use a subsequent encounter code (T46.2X6D) for follow-up care related to this underdosing.
• Always sequence this code first if the underdosing is the primary reason for the encounter.
• Consider adding an additional code to specify the nature of the adverse effect or the specific cardiac arrhythmia.