If you are shopping for a sleep center, be aware that many insurance providers require that a site be accredited before they will cover expenses for sleep services.
So do your research and pick a sleep center that has been accredited by the American Academy of Sleep Medicine if you can. As for how much a sleep center visit will cost you, cost varies from one site to another. It may also vary from one part of the country to another.
An insurance policy that covers outpatient tests such as an x-ray or an EEG should also cover an overnight sleep study. Medicaid and Medicare may have more rigid policies of coverage. Consult your healthcare company before you sign on with a sleep center to ensure that you have full understanding of coverage and fees.