Yes, I did it through my doctor's office. I know of two labs that do the testing: Diagnos Techs and Great Smokies. I think that they have doctor searches on their websites to find someone who uses them. At the least, you can use their contact info to inquire about that.
I had to get off all supplements and stay away from certain foods for 7 days total while doing the test. Once I sent it in, it took about two weeks to get the results.