CPT® Code 95811

Polysomnography; age 6 years or older, sleep staging with 4 or more additional parameters of sleep, with initiation of continuous positive airway pressure therapy or bilevel ventilation, attended by a technologist

Polysomnography, as defined by CPT® Code 95811, is a comprehensive sleep study conducted on patients aged 6 years or older. This procedure involves sleep staging, which is the process of categorizing 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. During the study, the patient typically arrives at the sleep center in the evening, where the environment is controlled to facilitate accurate monitoring. The sleep staging process utilizes several techniques, including electroencephalography (EEG), electro-oculography (EOG), and electromyography (EMG). EEG involves placing one to four electrodes on the scalp to monitor brain activity, while EOG uses electrodes positioned around the eyes to track eye movements. Additionally, a submental EMG is conducted by placing an electrode under the chin to assess muscle tone. Beyond these primary measurements, the study records four or more additional parameters of sleep, which may include heart rate and rhythm, airflow, respiratory effort, gas exchange through oximetry or other methods, muscle activity, extended EEG monitoring, and other relevant factors. The room is darkened to promote natural sleep, and the technologist records brain activity, eye movements, and muscle activity throughout the night. After the completion of the polysomnography, the physician reviews the collected data and provides a detailed written interpretation of the results. This code is specifically utilized when continuous positive airway pressure (CPAP) therapy or bilevel ventilation is initiated during the study, which is essential for patients with certain sleep-related breathing disorders. In cases where CPAP is applied, a nasal mask is used to maintain an open airway during inhalation, while bi-level ventilation employs a ventilator to support respiration while allowing for spontaneous breathing.