F84.1 is the ICD-10 code for Atypical autism. It is a four-character subcategory of F84 (Pervasive developmental disorders), the most specific level in the WHO edition. It belongs to the block F80–F89 (Disorders of psychological development) in Chapter V, Mental and behavioural disorders.
- Code type
- Subcategory (4 characters)
- Chapter
- V · F00–F99
- Classification
- WHO ICD-10, 2019 version
Definition
A type of pervasive developmental disorder that differs from childhood autism either in age of onset or in failing to fulfil all three sets of diagnostic criteria. This subcategory should be used when there is abnormal and impaired development that is present only after age three years, and a lack of sufficient demonstrable abnormalities in one or two of the three areas of psychopathology required for the diagnosis of autism (namely, reciprocal social interactions, communication, and restricted, stereotyped, repetitive behaviour) in spite of characteristic abnormalities in the other area(s). Atypical autism arises most often in profoundly retarded individuals and in individuals with a severe specific developmental disorder of receptive language.
What F84.1 includes
Conditions and terms that are coded here.
- Atypical childhood psychosis
- Mental retardation with autistic features
Coding notes
- Use additional code (F70-F79), if desired, to identify mental retardation.
F84.1 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
F84.1Atypisk autism
F84.1Atypisk autisme
DF841Atypisk autisme
- DF8410Autisme atypisk med hensyn til begyndelsesalder
- DF8411Autisme atypisk med hensyn til symptomatologi
- DF8412Autisme atypisk med hensyn til både begyndelsesalder og symptomatologi
F84.1Epätyypillinen autismi
- F84.10Alkamisiältään epätyypillinen autismi
- F84.11Oireiltaan epätyypillinen autismi
- F84.12Sekä alkamisiältään että oireiltaan epätyypillinen autismi
F84.1Atypischer Autismus
F84.1Autisme atypique
- F84.10Autisme atypique en raison de l’âge de survenue
- F84.11Autisme atypique en raison de la symptomatologie
- F84.12Autisme atypique en raison de l’âge de survenue et de la symptomatologie
F84.1atypisch autisme
Based on the World Health Organization’s International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10), 2019 version, and the national editions published by each country’s health authority. This page is a reference, not coding advice; follow your national coding rules when you report.
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