In my case, the doctors did not know enough to order the correct blood tests. There are many different tests that can be done with blood, I now know. The first doctor was also impossible to communicate with, so I never got back to her. The second (his pa) I gave a copy of the educational material that the rheumatologist gave me. I am now on my third doctor who knows about PMR because she worked in a hospital for several years. Serendipity.