Re: Elmar Question....please
First, to clarify, I am NOT a medical professional.
The 1990 American College of Rheumatology guidelines for Fibro dx, as I understand them, do NOT require "rule out" lab tests. However the ACR does recognize that fibro may co-exist with other problems, lupus & rheumatoid arthritis being frequently mentioned. It is fairly common for rheumatologists to test for these diseases when fibro symptoms are present.
If your fibro is accompanied by chronic fatigue syndrome, (there are CDC criteria) then testing for certain viruses, or post-viral syndromes may be helpful.
If sig neurological symptoms are present, tests to rule out MS are sometimes done.
I have known individuals whose fibro symptoms were exclusively muscular, to have tests for various forms of myositis & other muscular/neuromuscular diseases ordered by their docs.
I cannot say what rule-outs the state of CA requires for SSDI. Have you considered contacting them directly & asking which tests they require? Then taking that list to a co-operative doc, who might order said tests ... If the SSDI office is unco-operative or hedges, it may be that they are looking for rule-out testing that relates to the individual's specific presentation & symptomology.
The only other thing I know about SSDI claims is that certain docs seem to be more successful than others at obtaining results. It may have something to do with an accompanying letter, beyond the form ... not sure.
I believe that there have been legal cases regarding SSDI difficulties related to a fibro dx. Reading some of the case summaries may yield some helpful info. Any good reference librarian should be able to help you dig these up, or direct you to a specialized librarian who could help.
From a more practical standpoint, endocrine malfunction, often "minor," can significantly contribute to fibro pain, fatigue, & symptoms. This is typically glossed over by MDs, but hormone testing by a naturopath may reveal deficiencies, which can be treated with bio-identical hormone supplementation. Thyroid hormones & testosterone are frequently low in fibro. The standard thyroid screening done will not pick up the low hormone levels. These tests won't necessarily help your with SSDI, but are more for healing.
Best wishes on your quest.