IMHO, the best Sleep Doctor in The Villages is Dr. Juan Albino. His clinic is approved/certified by any nation-wide organization you can think of.
That said, I do not think that you can go wrong by using Dr. Marivic Villa (mentioned previously in this thread). She is as caring as Dr. Albino - and I know them both quite well.
I do not know what insurance cover either accepts, other than that they do accept AARP Healthcare!
If you are a sleep apnea patient, please know about the Sleep Apnea Support Group that meets each second Monday at 6:30 pm, at the Bridgeport Recreation Center. Much useful information there!
SWR