Well you are right, I did not know this although I know there are labs around here that do prescreening tests for companies hiring new employees etc. I did locate on of the labs connected to the company that you mentioned.
I do know that you can ask your Dr. to run a lab test and if they don't feel it is necessary you can sign a waiver to pay the bill yourself if they will just order the test.
I don't know what I would do if I were you. I have done some off the cuff things due to anxiety so I sure would not judge you if you followed through on this.
Interesting concept and I do know what it feels like to be told your lab works is fine but I would never have known to order the right test for me re my cancerous tumor. Now I do, however.
My test was not the result I was hoping for so I keep on doing what I have to do - chemo.
Hugs to you,