This article describes not only the new illness, but also the diagnostic tests for OCD. There is no single diagnostic test that can be done on an individual to determine the presence of the disorder. In fact, there is no known laboratory diagnostic technique that is recommended to test for the presence of OCD in an individual. The only diagnostic tests that are available include an analysis of exhibited symptoms to arrive at a succinct conclusion on the presence of OCD. To get the information required, the Y-BOCS test that administers a series of questions to a patient and rates them using a scale 0-40 can be utilized. A score of above 20 in the Y-BOCS may indicate obsessive disorder and 40 may indicative of compulsion. But if you want to diagnose the illness you should remember that only one test would give you nothing. The tests are appropriate since by establishing all these facts as regards ones symptoms, the possibility of the individual suffering mental illnesses, depression, or anxiety attacks can be ruled out. After verifying the presence of OCD, an individual can then seek timely treatment.