Diagnostic and Statistical Manual of Mental Disorders
It is the book that mental health professionals use, which lists categories and defines mental health disorders.
The DSM is now on it's 4th iteration, and the DSM-V is slated for publication around 2010.
It is unclear at this point whether Body Integrity Identity Disorder will be added to the list of disorders listed in the DSM-V. Many people with BIID wish to see this happen, arguing that until medical professionals have a diagnostic, black on white, there will be no possibility of an accepted Treatment Protocol for Body Integrity Identity Disorder. Others argue that BIID is not a mental condition and should therefore not be included in the DSM.
Dr. Michael First, one of the editors of the DSM-V was the first person to suggest the term "Body Integrity Identity Disorder".
For more information about the DSM, see Wikipedia:Diagnostic and Statistical Manual of Mental Disorders.