Lab Tests

Autoimmune disorders are diagnosed, evaluated, and monitored through a combination of autoantibody blood tests, blood tests to measure inflammation and organ function, clinical presentation, and through non-laboratory examinations such as X-rays. (From labtestsonline.org)

Here is a link to some information about a blood test that is sort of a generic screen for auto-immune disorders:
http://www.labtestsonline.org/understanding/analytes/ana/test.html

It is called the ANA (antinuclear antibody) test. Different patterns in the cells used for the ANA test are associated with different autoimmune disorders.

Other blood tests for autoimmune disorders may include:
ESR - http://labtestsonline.org/understanding/analytes/esr/test.html

CRP - http://labtestsonline.org/understanding/analytes/crp/test.html

Many more antibody tests and conditions that may call for antibody testing are listed here:
http://labtestsonline.org/understanding/analytes/antibody_tests/glance-4.html