Underdosing of other antidysrhythmic drugs, subs encntr

This code signifies that a patient is experiencing adverse effects or a worsening of their cardiac arrhythmia due to taking less than the prescribed amount of an antidysrhythmic medication other than amiodarone, lidocaine, or other specified drugs. This underdosing is occurring during a follow-up visit for the initial underdosing event or its sequelae.

Apply this code when a patient presents for ongoing management of an arrhythmia that is poorly controlled because they are not taking their prescribed non-specified antidysrhythmic medication as directed. This is appropriate for subsequent encounters where the underdosing is still a contributing factor to the patient's current clinical status.

• Ensure documentation clearly indicates underdosing of an antidysrhythmic drug not otherwise specified.
• Confirm the encounter is a subsequent visit related to the underdosing or its consequences, not the initial presentation.
• Always code the specific cardiac arrhythmia as the primary diagnosis, with this underdosing code as a secondary diagnosis.