© Copyright 2026 American Medical Association. All rights reserved.
Wearable electrocardiographic rhythm-derived monitoring, as described by CPT® Code 93233, involves the collection of electrocardiographic (ECG) data over a continuous 24-hour period. This procedure is performed using a specialized device, commonly referred to as a Holter monitor, which is worn by the patient during their normal daily activities. The device is equipped with electrodes or leads that are strategically placed on the patient's chest to capture the electrical activity of the heart. Throughout the monitoring period, the device records original ECG waveforms continuously, ensuring that all relevant heart rhythm data is collected without interruption. The recorded data is stored on a medium such as magnetic tape or a digital format, allowing for later analysis. Upon completion of the monitoring period, the patient returns the device, and the stored data is analyzed to assess various cardiac parameters, including heart rhythm and rate, ST segment analysis, heart rate variability, and T-wave alternans. A miniaturized printout of the entire recording is generated, accompanied by a microprocessor-based analysis report that includes selective sampling of rhythm strips. The physician is responsible for reviewing and interpreting this data to identify any potential heart arrhythmias. It is important to note that while CPT® Code 93233 specifically pertains to the physician's review and interpretation of the data, other related codes exist for the complete procedure, recording, and analysis components, ensuring comprehensive billing and documentation for the entire monitoring process.
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