DSM V Manual Revisions
Here is an article on the most significant revisions to the DSM-IV manual in over 20 years. This includes the elimination of Asperger Syndrome as a separate category. It will now fall under the Autism Spectrum Disorder classification.
There is also a new category on Disruptive Mood Dysregulation Disorder - severe recurrent temper tantrums (ultimately designed to replace the earlier and incorrect diagnosis of Bipolar Disorder in younger children.
DSM IV criteria does not automatically make students eligible or ineligible for special education services. However, these diagnoses are regularly used by doctors and psychiatrists in their evaluations of children and adults.