A neuro we went to (once) ordered this test for us from Athena, said it needed to be done because "it affects how you respond to the meds", and this test tested for only ONE gene (why, we have no idea) and they billed US $2,500.00. Yes, the decimals are in the correct place. To top it off, the insurance company has balked at paying this. Be sure you know what the charges are up front, and what all they will test for. I personally think charging twenty-five hundred dollars for ONE gene test is absurd, but that' s just me.