Summary & Overview
CPT 0745T: Image-Guided Localization and Mapping for Arrhythmia
CPT code 0745T denotes an image-guided localization and mapping procedure that fuses imaging data with electrical recordings (such as ECG) to identify the precise site of an arrhythmia prior to a separately reportable radiation ablation. This preparatory mapping is a specialized service that supports noninvasive or minimally invasive cardiac ablation workflows and is relevant to centers offering advanced electrophysiology and cardiac radiation services.
Key national payers in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of the clinical context for CPT code 0745T, typical sites of service, and the role of the procedure within arrhythmia management pathways. The publication also summarizes common billing considerations and the typical supporting documentation needed for medical review.
This summary equips clinicians, coding staff, and policy professionals with concise context on where CPT code 0745T fits in clinical care and billing. It highlights the procedure's purpose — mapping and localization to prepare for radiation ablation — and outlines what the reader will learn: definitions, payer coverage landscape, documentation expectations, and the clinical workflow implications for facilities that provide image-guided arrhythmia localization nationally.
Billing Code Overview
CPT code 0745T describes a procedure in which the provider uses imaging data alongside electrical recordings (for example, electrocardiography) to localize and map the site of an arrhythmia. The mapped information is used to prepare for a separately reportable radiation ablation of the identified arrhythmia focus.
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Service type: Image-guided electroanatomic localization and mapping to plan radiation ablation
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Typical site of service: Hospital outpatient department or ambulatory surgical center with advanced imaging and electrophysiology capabilities
Clinical & Coding Specifications
Clinical Context
A 68-year-old male with symptomatic, drug-refractory focal ventricular tachycardia is referred for stereotactic radiation ablation. The electrophysiology and radiation oncology teams schedule a pre-procedural localization session in an ambulatory procedural suite or hospital outpatient department. During this session, the provider integrates noninvasive imaging (CT or MRI) with surface and intracardiac electrical data (ECG, body-surface mapping, or previously recorded invasive electrograms) to create a fused anatomic-electrical map that identifies the arrhythmia focus and determines target volumes for later stereotactic radiation delivery. The workflow includes review of prior procedural records and imaging, acquisition of planning CT and ECG-gated cardiac imaging, placement of external ECG leads or use of body-surface mapping arrays, signal acquisition and processing, image–electrical map fusion, multidisciplinary review with radiation oncology, and documentation of target coordinates. The mapping session is billed separately from the later radiation ablation treatment and typically occurs in the cardiac catheterization lab, hybrid OR, or radiation oncology simulation suite depending on institutional setup.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when work, time, or technical difficulty substantially exceeds typical and documentation supports increased services. |