Autism and Autism Spectrum Disorder

The scope of this page is autism spectrum disorder (ASD) across the lifespan. For more detailed information and resources about social communication disorders across the lifespan, see the Social Communication Disorder Practice Portal page.

In support of critical considerations for neurodiversity and neurodiversity-affirming care, ASHA encourages providers to be familiar with Communication About Autism: Terminology Considerations.

This Practice Portal page will use the terms “person with autism,” “person with ASD,” “autistic person,” and “person on the autism spectrum,” reflecting diverse identities within the autism community. The term “autism” is generally used in this document, and the term “autism spectrum disorder (ASD)” is used when referring specifically to the diagnosis defined in the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, Text Revision (DSM-5-TR; American Psychiatric Association [APA], 2022). The terminology on this page is monitored on an ongoing basis. Clinicians are advised to use the terminology that their client identifies with best.

See the Autism Evidence Map for summaries of the available research on this topic.

The DSM-5-TR (APA, 2022) defines autism spectrum disorder (ASD) as a neurodevelopmental disorder characterized by deficits in social communication and social interaction and the presence of restricted, repetitive behaviors.

  • Social communication deficits show in various ways and can include impairments in joint attention and social reciprocity as well as challenges using verbal and nonverbal communication behaviors for social interaction.
  • Restricted, repetitive behaviors, interests, or activities are manifested by stereotyped, repetitive speech, motor movement, or use of objects; inflexible adherence to routines; restricted interests; and hyper- and/or hyposensitivity to sensory input.

The Models of Disability

Clinicians consider the various models of disability that may impact service delivery and clinical decisions. Clinicians’ understanding of different models of disability may inform their clinical philosophies. There are several models of disability, but two types are the most well-known.

The medical model of disability views disability through a deficit- or disorder-based lens, where “typical” or “normal” bodies and neurotypes are the end goal of interventions and services (Gaddy & Crow, 2023). Under this model, ASD is a medical diagnosis (as defined above by the DSM-5-TR [APA, 2022] diagnostic criteria). Many service funding sources, such as medical insurance, use a medical model of disability when determining clients’ services and funding eligibility. As such, the medical model of disability can inform the following outcomes and decisions:

  • identification and formal diagnosis of ASD
  • access to services and supports for clients
  • education for clients and professionals
  • development of therapy protocols
  • directions for research
  • social determinants of health

Clinicians use codes from the International Classification of Diseases and Related Health Problems, 10th Revision, Clinical Modification (ICD-10-CM; World Health Organization, 2001) and from Current Procedural Terminology® (CPT) on claims and in documentation for reimbursement. For more information about coding, see The ASHA Leader article, “The Right Codes for ASD-Related Services” (Swanson, 2019).

The social model of disability views disability as a natural part of life, in which a person is not disabled by an inherent “defect”; rather, a person is disabled by societal attitudes toward their difference(s), lack of effective accessibility and supports, and lack of inclusion by people and groups in the social majority (Gaddy & Crow, 2023). Autism is part of a person’s identity. Disability is a part of the person’s lived experience. This lived experience informs clinical practice and how it is carried out—such as using strengths-based approaches, providing accommodations, and providing person-centered care. Neurodiversity-affirming clinicians consider the social model of disability in their practice. It is important for clinicians to understand the different models of disability when providing individualized care.

Diagnosis Based on the DSM-5-TR

The criteria specified in the DSM-5-TR (APA, 2022) reflect several changes from those in the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Text Revision (DSM-IV-TR; APA, 2000). The most notable change eliminated the Pervasive Developmental Disorder (PDD) category, which included diagnoses of Autistic Disorder, Asperger’s Disorder, Childhood Disintegrative Disorder, Rett’s Disorder, and Pervasive Developmental Disorder Not Otherwise Specified.

The DSM-5-TR (APA, 2022) criteria for ASD (the term used in place of PDD) encompass the social and behavioral deficits typically associated with these populations but no longer specify subtypes. Although subtypes are no longer specified, the DSM-5-TR notes, “Individuals with a well-established DSM-IV diagnosis of autistic disorder, Asperger’s disorder, or pervasive developmental disorder not otherwise specified should be given the diagnosis of autism spectrum disorder” (APA, 2022, p. 57). The DSM-5-TR lists Rett syndrome, a genetic disorder, as a separate diagnosis in which disruptions of social interaction may be observed during the regressive phase.

According to the DSM-5-TR, individuals who meet the specified criteria are given the diagnosis of “autism spectrum disorder” with one of three severity levels of support. Each severity level specifies the amount of support needed for the individual’s social communication skills and degree of restricted, repetitive behaviors. Levels of support may vary by context and may fluctuate over time.

Content Disclaimer: The Practice Portal, ASHA policy documents, and guidelines contain information for use in all settings; however, members must consider all applicable local, state and federal requirements when applying the information in their specific work setting.

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