It is always the provider's responsibility to determine coverage and submit appropriate codes, modifiers, and charges for services rendered. Contact your local insurance carrier/payer for interpretation of appropriate coverage and coding policies. | Transmission distance varies based on the operating frequency and the building architecture. | Loaner units available for customers in the U.S. | Acknowledgments: This work was supported by Small Business Innovation Research grants from the National Institutes of Health (NINDS, NHLBI, NIMH) and the Department of Defense. | Caution: Federal law restricts this device to sale by or on the order of a physician only. | Crystal PSG, Sapphire PSG, SleepScout, DreamPort, and eCrystal PSG are trademarks and Crystal Monitor, and SleepView are registered trademarks of Cleveland Medical Devices Inc., Cleveland, OH. | Sapphire PSG, Crystal Monitor, SleepScout, SleepView, and DreamPort are FDA cleared to market.