Summary & Overview
CPT 93624: Follow-Up Electrophysiology Study with Programmed Stimulation
CPT code 93624 identifies a follow-up electrophysiology study in which intracardiac electrodes record electrical activity while the clinician uses programmed electrical stimulation to induce rapid heart rates and assess the effect of prior therapy, such as catheter ablation. This procedure is important for confirming procedural success, guiding further management of arrhythmias, and informing decisions about device therapy or repeat intervention. Nationally, utilization of post-ablation electrophysiologic testing influences both clinical outcomes and resource use in cardiac electrophysiology services.
Key payers referenced in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find benchmarks and coverage context for CPT code 93624, an explanation of its clinical role after ablation or other rhythm therapies, and operational considerations for site-of-service assignment and billing classification. The publication summarizes typical use cases, common modifiers seen on claims, and how this service fits into electrophysiology care pathways. Data not available in the input where applicable is noted. The content is presented to support payers, hospital administrators, and clinicians in understanding the national significance and billing context of CPT code 93624.
Billing Code Overview
CPT code 93624 describes a follow-up electrophysiologic study of the heart in which the clinician records intracardiac electrical activity using an electrode placed inside the heart and regulates heart rhythm by electrical stimulation. The procedure includes induction of rapid heart rates (programmed stimulation) to assess the effect of prior therapy, such as an ablation, on cardiac conduction and arrhythmia vulnerability.
Service Type: Electrophysiology study with programmed stimulation (follow-up/diagnostic)
Typical Site of Service: Electrophysiology laboratory or cardiac catheterization lab in an outpatient or inpatient hospital setting
Clinical & Coding Specifications
Clinical Context
A 62-year-old patient with a history of paroxysmal supraventricular tachycardia and prior catheter ablation presents for a post-procedural electrophysiology follow-up study. The patient reports recurrent palpitations and intermittent lightheadedness. Prior to the visit, the cardiology team reviews recent device and rhythm monitoring data. The electrophysiology lab admits the patient for a monitored diagnostic pacing study under conscious sedation or general anesthesia as indicated.
During the procedure, an electrophysiologist advances intracardiac catheters to record endocardial electrograms and uses an internal cardiac electrode to pace and induce tachyarrhythmia. The team assesses inducibility of arrhythmia, evaluates conduction properties, and tests the effect of prior ablation lesions by programmed electrical stimulation with incremental pacing and burst pacing. Findings are documented, and adjustments to medical therapy or plans for repeat ablation are determined based on inducibility and mapped arrhythmogenic sites. The typical site of service is an inpatient or outpatient hospital-based cardiac electrophysiology laboratory or a specialized ambulatory surgical center with full resuscitation capabilities.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | Default/No modifier | Use when no specific modifier applies and billing requires a placeholder code |
26 | Professional component | Use when billing only the physician interpretation or professional portion of the service |
52 | Reduced services | Use when the study is partially performed or abbreviated for clinical reasons |
53 | Discontinued procedure | Use when the study is started but terminated due to patient instability or other valid reasons |
62 | Two surgeons | Use when two physicians of different specialties share primary responsibility during a complex procedure |
78 | Return to OR for related procedure during postoperative period | Use if an unplanned repeat invasive electrophysiology procedure is required during the global period |
81 | Minimum assistant surgeon | Use when a minimal assistant surgeon service is furnished and reporting requires this modifier |
82 | Assistant surgeon (when a qualified resident is unavailable) | Use when an assistant surgeon is required but a resident is not available to assist |
QK | Medical direction of two, three, or four concurrent anesthesia procedures involving qualified individuals | Use when anesthesia services are billed and meet medical direction criteria |
QX | CRNA service: medically directed by physician | Use when a certified registered nurse anesthetist furnishes anesthesia under medical direction |
QY | Medical direction of one CRNA by an anesthesiologist | Use when an anesthesiologist provides medical direction for a single CRNA |
AS | Physician assistant, nurse practitioner, or clinical nurse specialist services in lieu of physician | Use when an advanced practice provider performs part of the service under appropriate state law |
26 | Professional component | Use when the provider bills only the interpretation of intracardiac tracings (repeat entry for emphasis on relevance) |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
| Data not available in the input. | Data not available in the input. | Data not available in the input. |
| 3345C0002X | Cardiac Electrophysiology (Clinical Cardiac Electrophysiology) | Electrophysiologists perform intracardiac studies and ablation follow-up |
| 207RH0000X | Cardiology | Interprets study results and manages medical therapy |
| 163W00000X | Emergency Medicine | May be involved for acute peri-procedural complications |
| 363L00000X | Anesthesiology | Provides sedation or general anesthesia during complex studies |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
I47.1 | Supraventricular tachycardia | Common indication for intracardiac electrophysiology studies and post-ablation inducibility testing |
I48.0 | Paroxysmal atrial fibrillation | Evaluated when atrial arrhythmias are suspected and to assess ablation efficacy |
I49.01 | Ventricular fibrillation | Relevant when ventricular arrhythmias are inducible or need assessment after therapy |
I49.9 | Cardiac arrhythmia, unspecified | Used when a specific arrhythmia diagnosis is pending and diagnostic study is required |
I45.6 | Pre-excitation syndrome (e.g., Wolff-Parkinson-White) | EP study and pacing are used to localize accessory pathways and test ablation success |
R00.2 | Palpitations | Symptom code commonly present when ordering diagnostic intracardiac electrophysiology studies |
Z98.890 | History of cardiac ablation | Indicates prior ablation; 93624 assesses for recurrent or persistent arrhythmia post-procedure |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
93624 | Intracardiac electrophysiologic study with induction or attempted induction of supraventricular or ventricular tachyarrhythmia; follow-up study | Primary code for the described intracardiac follow-up electrophysiology study involving pacing and induction to assess therapy effectiveness |
93621 | Intracardiac electrophysiologic study including insertion and repositioning of multiple electrode catheters with pacing and recording and induction or attempted induction of arrhythmia; initial study | Performed prior to ablation; documents baseline electrophysiologic properties and may precede 93624 for follow-up comparison |
93650 | Intracardiac catheter ablation of focal arrhythmia; for example, supraventricular tachycardia | Ablation procedure that may have been performed earlier; 93624 assesses efficacy of such therapy |
93279 | Telemetry monitoring using external ambulatory continuous rhythm recording (eg, Holter) for extended periods | Noninvasive monitoring often used before or after 93624 to document recurrent arrhythmia episodes |
93799 | Unlisted cardiovascular procedure | Used for novel or not otherwise specified intracardiac procedures related to complex mapping or adjunctive therapies |
01210 | Anesthesia for procedures on extracranial vessels of head and neck; not otherwise classified (example anesthesia code) | Anesthesia codes may be billed in conjunction with 93624 when general anesthesia or monitored anesthesia care is provided |