The Board of Trustees of the American Psychiatric Association has announced that the fifth edition of the group's "Diagnostic and Statistical Manual for Mental Disorders" or DSM-5, the official guide to classifying psychiatric illnesses will be released in the spring of 2013. Currently, mental health professionals use the DSM-4 manual, which was last updated in 1994.
Psychiatrists and psychologists base their diagnoses on the definitions set out in the DSM. This change means that several new mental health conditions (including hoarding and disruptive mood dysregulation disorder (for children). At the same time, some existing mental health conditions will be re-defined (for example, depression will now include a provision for bereavement that did not previously exist).
Social Security's mental health listings, which may be found here, will need to re-written to reflect the new DSM. You can review the latest draft of the DSM-5 by clicking here.