Summary & Overview
HCPCS C8928: Transthoracic Echocardiography with Contrast During Stress Testing
HCPCS Level II code C8928 denotes transthoracic echocardiography performed with contrast (or without contrast followed by with contrast) in real time with 2D imaging and M‑mode as applicable, conducted during rest and cardiovascular stress testing (treadmill, bicycle, and/or pharmacologic). This code captures a frequently used diagnostic service in cardiac care, informing diagnosis and management of ischemia, valvular disease, and ventricular function under stress conditions. Nationally, standardized coding for stress echocardiography supports consistent billing, utilization tracking, and clinical quality measurement across settings.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical service and typical sites of care, an outline of common modifiers used with the service, and context for how the code fits into cardiac imaging service lines. The publication summarizes billing and reporting considerations, highlights policy and coverage relevance for major payers, and provides benchmarks and comparative points useful for revenue cycle and clinical leadership. Practical value includes clarifying when contrast-enhanced stress echocardiography is represented by C8928, how it is documented in reports, and what aspects influence payer processing and authorization workflows.
Billing Code Overview
HCPCS Level II code C8928 describes transthoracic echocardiography with contrast, or without contrast followed by with contrast, real-time with image documentation (2D), including M‑mode recording when performed, during rest and cardiovascular stress testing (treadmill, bicycle exercise and/or pharmacologic stress), with interpretation and report.
Service Type: Cardiac imaging — transthoracic echocardiography with contrast during rest and stress testing
Typical Site of Service: Hospital outpatient departments, outpatient imaging centers, cardiac diagnostic laboratories, and ambulatory surgical centers where cardiovascular stress testing and echocardiography are performed
Clinical & Coding Specifications
Clinical Context
A 62-year-old patient with exertional dyspnea and known coronary artery disease is referred for a transthoracic echocardiographic stress study. The patient undergoes an exercise treadmill stress test with baseline resting transthoracic echocardiography followed by exercise stress imaging. Contrast agent is administered during the study to improve endocardial border delineation because of technically limited acoustic windows. Real-time two-dimensional imaging with m-mode when indicated is obtained at rest and immediately post-stress, and a cardiologist provides interpretation and a written report documenting wall motion, ejection fraction, and any ischemic changes.
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Typical workflow:
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Patient check-in, pre-procedure screening for contrast contraindications (e.g., known hypersensitivity).
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Baseline resting transthoracic echocardiography performed with and/or without contrast per sonographer protocol, including 2D imaging and m-mode as needed.
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Treadmill or pharmacologic stress protocol implemented; continuous monitoring of vital signs and ECG.
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Contrast agent administered during rest or following noncontrast imaging to optimize images during peak stress imaging.
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Acquisition of real-time 2D images with image documentation during rest and stress phases.
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Cardiologist review, interpretation, and generation of the final report.
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Results communicated to referring clinician and incorporated into treatment planning.