DSM-IV Diagnostic Criteria


299.00 Autistic Disorder

299.10 Childhood Disintegrative Disorder
Apparently normal development for at least the first 2 years after birth as manifested by the presence of age-appropriate verbal and nonverbal communication, social relationships, play, and adaptive behavior.
Clinically significant loss of previously acquired skills (before age 10 years) in at least two of the following areas:
  1. expressive or receptive language
  2. social skills or adaptive behavior
  3. bowel or bladder control
  4. play
  5. motor skills
Abnormalities of functioning in at least two of the following areas:
  1. qualitative impairment in social interaction (e.g., impairment in nonverbal behaviors, failure to develop peer relationships, lack of social or emotional reciprocity)
  2. qualitative impairments in communication (e.g., delay or lack of spoken language, inability to initiate or sustain a conversation, stereotyped and repetitive use of language, lack of varied make-believe play)
  3. restricted, repetitive, and stereotyped patterns of behavior, interests, and activities, including motor stereotypies and mannerisms
The disturbance is not better accounted for by another specific Pervasive Developmental Disorder or by Schizophrenia.

299.80 Asperger's Disorder
Qualitative impairment in social interaction, as manifested by at least two of the following:
  1. marked impairment in the use of multiple nonverbal behaviors such as eye-to-eye gaze, facial expression, body postures, and gestures to regulate social interaction
  2. failure to develop peer relationships appropriate to developmental level
  3. a lack of spontaneous seeking to share enjoyment, interests, or achievements with other people(e.g., by a lack of showing, bringing, or pointing out objects of interest to other people)
  4. lack of social or emotional reciprocity.
Restricted repetitive and stereotyped patterns of behavior, interests, and activities, as manifested by at least one of the following:
  1. encompassing preoccupation with one or more stereotyped and restricted patterns of interest that is abnormal either in intensity or focus
  2. apparently inflexible adherence to specific, non-functional routines or rituals
  3. stereotyped and repetitive motor mannerisms (e.g., hand or finger flapping or twisting, or complex whole-body movements)
  4. persistent preoccupation with parts of objects
The disturbance causes clinically significant impairment in social, occupational, or other important areas of functioning.
There is no clinically significant general delay in language (e.g., single words used by age 2 years, communicative phrases used by age 3 years)
There is no clinically significant delay in cognitive development or in the development of age-appropriate self-help skills, adaptive behavior (other than in social interaction), and curiosity about the environment in childhood.
Criteria are not met for another specific Pervasive Developmental Disorder or Schizophrenia.

299.80 Pervasive Developmental Disorder Not Otherwise Specified (Including Atypical Autism)
This category should be used when there is a severe and pervasive impairment in the development of reciprocal social interaction or verbal and nonverbal communication skills, or when stereotyped behavior, interests, and activities are present, but the criteria are not met for a specific Pervasive Developmental Disorder, Schizophrenia, Schizotypal Personality Disorder, or Avoidant Personality Disorder. For example, this category includes atypical autism --- presentations that do not meet the criteria for Autistic Disorder because of late age of onset, atypical symptomatology, or subthreshold symptomatology, or all of these.

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