Clinical Cardiac Electrophysiology CPT Codes for Outpatient and OBL Billing
Clinical cardiac electrophysiology (EP) studies the heart's electrical system to diagnose and treat arrhythmias, mapping conduction pathways and treating rhythm disturbances with catheter ablation. Much of this work is documented through the CPT EP family, roughly 93600 through 93662, covering diagnostic studies, recordings, pacing, and ablation. Therapeutic codes such as 93653 (treatment of SVT) and 93656 (treatment of atrial fibrillation) bundle the diagnostic study with the ablation in a single code, so coders should read the descriptor before adding separate study codes.
Where a case is performed matters for payment. Codes on CMS Addendum AA are on the ASC Covered Procedures List, meaning Medicare pays them in an ASC, while Addendum EE codes are excluded. Confirm the setting and current addendum status for each code before you bill. DataLily's procedure library tracks CPT-specific prior-authorization and documentation requirements to support that check.
Clinical Cardiac Electrophysiology codes(10)
- 93653Compre ep eval tx svt
- 93656Compre ep eval abltj atr fib
- 93620Comp ep evl r at ven pac&rec
- 93619Comprehensive ep evaluation
- 93623Prgrmd stimj&pacg iv rx nfs
- 93642Ep evl 1/2chmb trnsvns cvdfb
- 93650Icar cath abltj av node func
- 93654Compre ep eval tx vt
- 93655Icar cath abltj dscrt arrhyt
- 93657Tx l/r atrial fib addl
Are cardiac electrophysiology procedures done in an ASC?
Some are, and many are furnished in an office-based lab (OBL) instead. Whether Medicare pays a specific EP procedure in an ASC depends on its CMS addendum status: codes on Addendum AA are on the ASC Covered Procedures List, while Addendum EE codes are excluded from ASC payment. When EP runs as an OBL proceduralist under place of service 11, the service is paid under the physician fee schedule rather than as an ASC facility claim. Confirm the setting and the current addendum status for each code before billing.
What CPT codes does clinical cardiac electrophysiology use?
EP work centers on the CPT family from about 93600 to 93662. This includes diagnostic and comprehensive EP evaluations such as 93619 and 93620, and therapeutic studies with ablation such as 93653 for supraventricular tachycardia and 93656 for atrial fibrillation. The family also covers intracardiac recordings, pacing, and related mapping and stimulation services.
What is the difference between codes like 93653, 93656, and 93619?
93619 describes a comprehensive EP evaluation, a diagnostic study with right atrial and ventricular recording and pacing. 93653 and 93656 are therapeutic: each bundles a comprehensive EP study with catheter ablation, 93653 for treatment of supraventricular tachycardia and 93656 for treatment of atrial fibrillation. Because the ablation codes already include the diagnostic study, coders should avoid separately reporting a standalone EP evaluation for the same session unless the descriptor and guidelines clearly support it.