Autism used to be considered many different conditions. Some diagnoses in the past include: Classical autism, Asperger's syndrome, and Pervasive Developmental Disorder Not Otherwise Specified (PDD-NOS). However, none of these separate diagnoses exist anymore. Both the US DSM-V (2013) and the ICD-11 (2022) have only one diagnosis: Autism spectrum disorder. This happened because doctors found that these diagnoses were frequently used in different ways. For example, one person could get a diagnosis of classical autism from one doctor, Asperger's from a second doctor, and PDD-NOS from a third doctor. This was hurting people's ability to access services and support.