Hope this helps (need to verify - from 2011 CPT):
95803 - actigraphy testing, recording, analysis, interpretation, and report (min 72 hrs to 14 consecutive days of recording)
95805 - multiple sleep latency or maintenance of wakefulness testing, recording, analysis and interpretation of physiological measurements of sleep during multiple trials to assess sleepiness
95806 - sleep study, unattended, simultaneous recording of, heart rate, oxygen saturation, respiratory airflow, and respiratory effort (eg, thoracoabdominal movement)
(for unattended sleep study that measures heart rate, oxygen saturation, respiratory analysis, and sleep time, use 95800)
(for unattended sleep study that measures heart rate, oxygen saturation, and respiratory analysis, use 95801)
95800 - sleep study, unattended, simultaneous recording; heart rate, oxygen saturation, respiratory analysis (eg, by airflow or peripheral arterial tone), and sleep time
95801 - minimum of heart rate, oxygen saturation, and respiratory analysis (eg, by airflow or peripheral arterial tone)
95807 - sleep study, simultaneous recording of ventilation, respiratory effort, ECG or heart rate, and oxygen saturation, attended by tech
95808 - polysomnograph; sleep staging with 1-3 additional parameters of sleep, attended by tech
95810 - sleep staging with 4 or more additional parameters of sleep, attended by tech
95811 - sleep staging with 2 or more additional parameters of sleep, with initiation of continuous positive airway pressure therapy or bilevel ventilation, attended by tech