I agree with @mobilian33 that blood panels and metabolic profiles are a better way of diagnosing patients than simply doing the regular hands on examination that the doctor does, but it's unbelievable all the different tests they have.
I was having problems with my feet swelling, and the possible causes were narrowed down. The doctor then asked which blood tests I wanted to do first. I didn't realize they would have to do all of these tests separately . I don't know how many tests they ended up doing, but I had to pay for most of them since my insurance didn't cover all of them.
What's worse, after all the test were completed, we still don't know what is causing the swelling and pain in my feet.