Where can I find certified rapid antigen tests near the Millennium Hilton for my flight back to the US?

The inquiry is about locating certified rapid antigen testing centers in Central Bangkok, specifically near the Millennium Hilton, for a flight back to the US. Several suggestions were made, including checking 7/11 (though it was questioned if they are certified), Medconsult in Thonglor, and a testing clinic located near Silom BTS station. Additional advice includes searching online for clinics that provide travel-specific COVID testing. Bangkok Hospital was also mentioned as a potential facility.