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The tenth revision of the International Statistical Classification of Diseases and Related Health Problems (ICD-10) has four categories of developmental disorders: specific developmental disorders of speech and language, specific developmental disorders of scholastic skills, specific developmental disorder of motor function, and mixed specific developmental disorder.
PDD-NOS was one of four disorders collapsed into the diagnosis of autism spectrum disorder in the DSM-5, [3] and also was one of the five disorders classified as a pervasive developmental disorder (PDD) in the DSM-IV. [4] The ICD-10 equivalents also became part of its definition of autism spectrum disorder, as of the ICD-11.
The pervasive developmental disorders were: [4] Pervasive developmental disorder not otherwise specified (PDD-NOS), which includes atypical autism, and is the most common (47% of autism diagnoses); [10] Typical autism, the best-known; Asperger syndrome (9% of autism diagnoses); Rett syndrome; and; Childhood disintegrative disorder (CDD).
Developmental disorders comprise a group of psychiatric conditions originating in childhood that involve serious impairment in different areas. There are several ways of using this term. [1] The most narrow concept is used in the category "Specific Disorders of Psychological Development" in the ICD-10. [1]
The DSM-5 (2013), the current version, also features ICD-9-CM codes, listing them alongside the codes of Chapter V of the ICD-10-CM. On 1 October 2015, the United States health care system officially switched from the ICD-9-CM to the ICD-10-CM. [1] [2] The DSM is the authoritative reference work in diagnosing mental disorders in the world.
The term mental retardation, which stemmed from the understanding that such conditions arose as a result of delays or retardation of a child's natural development, [73] was used in the American Psychiatric Association's DSM-IV (1994) and in the World Health Organization's ICD-10 (codes F70–F79).
312.81 Childhood onset: At least one of the Diagnostic Criteria needs to be met for Conduct Disorder before age 10. 312.82 Adolescent onset: The absence of any criteria characteristic of Conduct Disorder before the age of 10. 312.89 Unspecified onset: The age of onset is unknown. 313.81 Oppositional Defiant Disorder
Hyperkinetic disorder was a neuropsychiatric condition that was thought to emerge in early childhood. Its features included an enduring pattern of severe, developmentally inappropriate symptoms of inattention, hyperactivity, and impulsivity across different settings (e.g., home and school) that significantly impair academic, social and work performance. [1]