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Rapid atrial pacing induced left A-flutter into A-fibrillation back into A-flutter into A-fibrillation. Ablation of the roof near the LSVP terminated the A Fib. Ablation contined down the posterior antrum of the L atrium which induced A-Flutter. We ablated around the entire L antrum, the tachycardia continued. We ablated the roof of the LA, from LSPV to RSPV as well as the posterior line from the L antrum to the R antrum and the left A-flutter terminated. The left flutter was posterior wall dependent. Multiple ablations were done in the mitral isthmus region and the corresponding contralateral CS region. After ablation was complete, EPS was done with no inducible atrial tachydysrhythmia. Adenosine bolus was given to induce pulmonary vein fascicles. None were induced. Post op dx are atrial fibrillation and two different left atrial flutter. Should this be coded to 93656, 93657 x 2 or 93653, 93656, 93657 x 1? In this case, would 93623 be billed for the adenosine?