I Have To Get Blood Tests For Low White Blood

I have to get blood tests for low white blood cell counts and anemia when I arrive in Naples next week. I've had four tests in last two weeks from my Portland, Maine doctor, August Valenti. He wants a reading while I am down here. Where should I go to get this service? A hospital or lab. Do I need to have a doctor in Naples to get this or will they accept Valenti's orders?