I was a meth user and only very recently quit. i am having some tests done for neuropathy. does the dr. have to tell you that they are testing for dru?

Yes, if private: Your mdmay not perform secret tests on you. But your employer, or prospective employers may (you give permission as part of the employment process). But most importantly, you should have an addiction pro helping and supporting you now. Addictions--meth in particular--can creep right back in and take over, especially if you are hit by some new stress--which happens in life all the time.