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Polysomnography, as defined by CPT® Code 95782, is a comprehensive sleep study conducted on patients younger than 6 years old. This procedure involves sleep staging, which is the classification of different sleep phases, and is performed by a trained sleep technologist. The primary purpose of polysomnography is to evaluate and diagnose various sleep disorders, including but not limited to sleep apnea, narcolepsy, insomnia, sleepwalking, restless leg syndrome, and other periodic movements that occur during sleep. The process of sleep staging utilizes several monitoring techniques, including electroencephalography (EEG), electro-oculogram (EOG), and electromyogram (EMG). EEG is conducted by placing one to four electrodes on the scalp to monitor brain activity, while EOG involves attaching electrodes around the eyes to track eye movements. Additionally, a submental EMG is performed by placing an electrode under the chin to assess muscle tone during sleep. In conjunction with these primary monitoring techniques, four or more additional parameters of sleep are recorded and analyzed. These parameters may include heart rate and rhythm, airflow, ventilation and respiratory effort, gas exchange through oximetry or other methods, extremity muscle activity, extended EEG monitoring, penile tumescence, gastroesophageal reflux, continuous blood pressure monitoring, snoring, and body position. The comprehensive data collected during the polysomnography is then analyzed by a physician, who provides a written interpretation of the results. It is important to use CPT® Code 95782 specifically when four or more additional parameters of sleep are measured, distinguishing it from other related codes such as CPT® Code 95873, which is used when continuous positive airway pressure (CPAP) therapy or bilevel ventilation is also performed during the study.
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