I just happened to see your recent post. To answer your question, there is not one blood test that can diagnose RA. Rheumatologist will order more extensive blood testing, anti-CCP checking for antibodies, ESR or CRP looking for any inflammation in the body. Even with elevated ESR or CRP, that is not used to make a diagnosis. Also a physical exam & xrays may be ordered. It is a combination of things to arrive at a diagnosis. It would be terribly wrong for any dr to make this diagnosis based on one lab test.
I suggest that you obtain copies of all your lab test reports because you need to know what has been ordered & look at the results. Rheumatologists are the specialists to diagnose & treat people with RA. Personally, no, I would not ever to rely on my pcp to make a diagnosis of RA, that is out of his realm of care. I have been with my pcp for over 20 years. While he knows my history quite well, if something unusual ever pops up, he immediately refers me to a specialist.
Get copies of all of your records & consider getting a 2nd opinion with another rheumatologist. I know it can be frustrating when there is conflict with drs, this is why I suggest a 2nd opinion. Good luck & take care.
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Post Edited (straydog) : 2/17/2019 10:02:10 AM (GMT-7)