Summary & Overview
HCPCS C8929: Transthoracic Echocardiography with Contrast, Complete
HCPCS Level II code C8929 represents a complete transthoracic echocardiogram performed with contrast (or without contrast followed by with contrast), including real-time 2D imaging, M-mode when performed, spectral Doppler, and color flow Doppler. This code matters nationally as contrast-enhanced transthoracic echocardiography improves endocardial border delineation, chamber assessment, and detection of regional wall motion abnormalities, impacting diagnostic accuracy and downstream care decisions.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication provides a consolidated view of how C8929 is used across payers, typical sites of service, and clinical contexts where contrast-enhanced transthoracic echocardiography is indicated.
Readers will learn: benchmarks for utilization and site-of-service patterns (national context), the clinical scope and documentation elements associated with C8929, and relevant policy or coding considerations affecting coverage and billing. Data not available in the input is explicitly noted where applicable. The content is intended to inform coding administrators, policy analysts, and billing staff about the clinical and billing profile of HCPCS Level II code C8929 without providing clinical recommendations.
Billing Code Overview
HCPCS Level II code C8929 describes a transthoracic echocardiography procedure performed with contrast, or without contrast followed by with contrast, with real-time 2D image documentation. The service includes M-mode recording when performed, a complete examination, spectral Doppler echocardiography, and color flow Doppler echocardiography.
Service Type: Diagnostic cardiovascular imaging — transthoracic echocardiogram with contrast
Typical Site of Service: Hospital outpatient department, outpatient imaging center, or cardiology clinic with echocardiography capabilities
Clinical & Coding Specifications
Clinical Context
A 67-year-old male with hypertension and new-onset exertional dyspnea is referred to cardiology for evaluation of suspected ischemic cardiomyopathy. The patient presents to the hospital outpatient echocardiography lab after an initial resting transthoracic echocardiogram (TTE) demonstrated suboptimal endocardial border definition and possible regional wall motion abnormalities. The clinical workflow includes pre-procedure consent and allergy screening (contrast agent shellfish/iodine not relevant for most ultrasound contrast agents), vital signs assessment, and placement on cardiac monitoring. A complete TTE with spectral and color Doppler is performed first without contrast. Because of poor acoustic windows and unclear endocardial visualization, intravenous ultrasound contrast is administered and real-time contrast-enhanced imaging is acquired, including 2D imaging with m-mode when indicated, spectral Doppler measurements, and color flow Doppler assessment. Images and cine loops are documented and archived in the PACS. The interpreting cardiologist reviews contrast-enhanced images to assess left ventricular ejection fraction, regional wall motion, valvular function, and intracardiac masses or thrombus. Procedure coding uses C8929 to reflect transthoracic echocardiography with contrast (or without followed by with contrast) complete study. Typical sites of service include hospital outpatient imaging centers, freestanding cardiac imaging centers, and hospital inpatient wards when indicated. Common clinical indications include heart failure evaluation, suspected ischemia, poor acoustic windows on prior study, evaluation for intracardiac thrombus prior to cardioversion, and assessment of valvular disease severity when endocardial definition is limited.
Coding Specifications
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