Finding a Tricare Prime doctor will be a challenge here in The Villages. Tricare Standard is accepted by several physicians. Your best bet is to work the Tricare Internet site and maybe give them a call. Here is the site:
Welcome to TRICARE I don't like the site much but you can get info from it. Set up your profile as Retiree, Prime in Zip Code 32162; then search for doctors.
I'm retired Air Force and have had Tricare Standard (with no secondary) here since arriving in The Villages July 2009. Now have Medicare as primary health insurance with Tricare For Life (TFL) as secondary payer. No problems getting medical checks and treatment.
Good Luck.