There are board certified sleep medicine doctors. Normally, they are otolaryngologists. It might be hard getting in until the COVID virus is contained. When I did mine I went to the office where they had sleeping quarters and spent the night there hooked up to several wires that measured my sleep patterns to determine if I qualified for a CPAP machine. I did-and have been using one for several years. So does my wife. The only downsize is my dog runs away when we put on our masks.
