I made a test and go reservation at Novatel BKK airport hotel for upcoming December trip. Novotel is 5 minutes from the airport. The reservation process itself was just like any other hotel reservation - just make sure you select the "Wellness" package per below. It costs 4900 baht and the breakfast buffet option is another 500 baht. They didn't ask for passport info or anything else except airline arrival time for their shuttle service. They told me they have testing available 24 hours a day and will have results 6 hours later. Because I am arriving near midnight, I will be getting the test and hopefully will have the results when I wake up the next morning. If there are any hitches or hassles, I will be reporting them here.