Shop online for STD tests to help identify various sexually-transmitted infections, including chlamydia, gonorrhea, hepatitis B, hepatitis C, trichomoniasis, syphilis, HIV-1, and HIV-2. Once you purchase a test, it's easy to schedule an appointment at one of 2000+ Quest Diagnostics locations nationwide. You'll get your results online, fast and discreetly, and have the option to discuss them with an independent physician at no extra cost.