The overnight polysomnograms that are performed in a sleep center may cost from $600 to $5,000 for each night, according to various discussions online. The average is typically around $1000 per night. Likely one of the most expensive places to get a sleep study is Stanford University, where studies are about $8,500 per night. Insurance may cover the majority of this expense.Home sleep apnea testing is significantly less expensive, due to the fact that less data is collected and the overhead costs of maintaining a sleep center and paying a sleep technician do not exist. In general, these tests may cost closer to $200 to $600 per night.