CPT® Code 93657

Add-On Code

Additional linear or focal intracardiac catheter ablation of the left or right atrium for treatment of atrial fibrillation remaining after completion of pulmonary vein isolation (List separately in addition to code for primary procedure)

The CPT® Code 93657 refers to an additional linear or focal intracardiac catheter ablation procedure specifically targeting the left or right atrium for the treatment of atrial fibrillation that persists after the completion of pulmonary vein isolation. This procedure is performed as a supplementary intervention following an initial ablation, which is typically denoted by CPT® Code 93656. The primary goal of this additional ablation is to eliminate any remaining arrhythmogenic foci that may be contributing to the ongoing atrial fibrillation. The procedure involves a comprehensive electrophysiologic study (EPS) that includes the induction or attempted induction of arrhythmia, allowing for a detailed assessment of the heart's electrical activity. During the procedure, multiple electrode catheters are inserted into the heart through transseptal catheterizations, which may involve puncturing the skin or making small incisions over blood vessels, usually in the groin area. These catheters are then maneuvered into the right and/or left atrium and/or right ventricle, where they can record electrical signals and deliver pacing stimuli. The EPS study encompasses various techniques, including left or right atrial pacing, right ventricular pacing, and His bundle recording, to evaluate all areas that may be involved in triggering or sustaining atrial fibrillation. Following the EPS, pacing techniques are employed to induce arrhythmia, which may involve adjusting pacing rates or using programmed stimulation. The procedure also incorporates intracardiac echocardiography and electrophysiological 3D mapping to visualize and analyze the arrhythmogenic pathways. Ultimately, the ablation catheter is applied to the targeted tissue around the pulmonary veins' connections to the left atrium to achieve effective isolation. Code 93657 is reported when additional ablation is necessary to address any residual atrial fibrillation after the initial pulmonary vein isolation has been completed.