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 additional code to identify any associated medical condition and mental retardation.
 * F84.0 Autistic disorder
 * Infantile autism
 * Infantile psychosis
 * Kanner's syndrome
 * Excludes1: Asperger?s syndrome (F84.5)
 * F84.2 Rett's syndrome
 * Excludes1: Asperger?s syndrome (F84.5)
 * Autistic disorder (F84.0)
 * Other childhood disintegrative disorder (F84.3)
 * F84.3 Other childhood disintegrative disorder
 * Dementia infantilis
 * Disintegrative psychosis
 * Heller's syndrome
 * Symbiotic psychosis
 * Use additional code to identify any associated neurological condition.
 * Excludes1: Asperger?s syndrome (F84.5)
 * Autistic disorder (F84.0)
 * Rett's syndrome (F84.2)
 * F84.5 Asperger's syndrome
 * Asperger?s disorder
 * Autistic psychopathy
 * Schizoid disorder of childhood
 * F84.8 Other pervasive developmental disorders
 * Overactive disorder associated with mental retardation and stereotyped movements
 * F84.9 Pervasive developmental disorder, unspecified
 * Atypical autism

F88 Other disorders of psychological development

 * Includes: developmental agnosia

F89 Unspecified disorder of psychological development

 * Includes: developmental disorder NOS

=Behavioral and emotional disorders with onset usually occurring in childhood and adolescence (F90-F98)=
 * Note: Codes within categories F90-F98 may be used regardless of the age of a patient. These disorders generally have onset within the childhood or adolescent years, but may continue throughout life or not be diagnosed until adulthood

F90 Attention-deficit hyperactivity disorders

 * Includes: attention deficit disorder with hyperactivity
 * attention deficit syndrome with hyperactivity
 * Excludes2: