Key Highlights
- Autism no longer has official subtypes. In 2013, three separate diagnoses were consolidated into one: autism spectrum disorder.
- Asperger syndrome, PDD-NOS, and autistic disorder are the labels that were merged, and people diagnosed under them keep their diagnosis.
- Variation is now described through three severity levels and a set of specifiers rather than through separate categories.
- Levels describe support needs in two domains separately, at one point in time, and they can differ from each other and change.
- Specifiers record whether intellectual impairment, language impairment, a known genetic condition, or another condition is present.
- "Profound autism" is a newer proposed term for high-dependency needs, formally introduced by a Lancet Commission in 2021 and actively debated.
- No label determines a child's therapy plan. Assessment of specific skills does.
Parents searching for the types of autism usually find lists of four or five categories presented as current fact. Most of those lists describe a diagnostic system that was replaced more than a decade ago.
The accurate answer is more useful than the outdated one, because it explains what a diagnostic report actually contains and why two children carrying the same label can look nothing alike. This article covers what the former subtypes were, what replaced them, how the current system describes variation, which older terms remain in circulation, and what any of it means for planning support.
Quick Answer: What Are the Different Types of Autism?
Autism does not currently have official subtypes. In 2013, the DSM-5 consolidated autistic disorder, Asperger syndrome, and pervasive developmental disorder not otherwise specified into a single diagnosis called autism spectrum disorder. Variation within that diagnosis is now described using three severity levels, which indicate how much support a person needs in social communication and in restricted or repetitive behaviors, plus specifiers noting things like accompanying intellectual or language impairment. Older subtype names still circulate socially, and a newer term, profound autism, has been proposed for people with high-dependency needs.
What the Old Subtypes Were, and What Happened to Them
Before 2013, five separate diagnoses sat under a heading called Pervasive Developmental Disorders. According to the Center for Autism Research at Children's Hospital of Philadelphia, those five were autistic disorder, Asperger syndrome, pervasive developmental disorder not otherwise specified (PDD-NOS), Rett syndrome, and childhood disintegrative disorder.
The DSM-5 eliminated the Pervasive Developmental Disorders category. Autistic disorder, Asperger syndrome, and PDD-NOS were combined into one label: autism spectrum disorder. The CDC confirms the same consolidation.
Former diagnosisCurrent statusWhat it means in practiceAutistic disorderMerged into autism spectrum disorderDiagnosis retained; new evaluations use ASD with levels and specifiersAsperger syndromeMerged into autism spectrum disorderStill used socially and as an identity; no longer issued as a new diagnosisPDD-NOSMerged into autism spectrum disorderWas a catch-all for presentations not fitting the other categoriesRett syndromeRemoved from the autism categoryRecognized as a distinct genetic conditionChildhood disintegrative disorderNo longer a separate diagnosisRegression is now addressed within the ASD framework
A common worry is worth addressing directly: people diagnosed under the older labels did not lose their diagnoses when the manual changed. An adult diagnosed with Asperger syndrome in 2005 remains diagnosed. What changed is what a clinician writes for a new evaluation today.
How Autism Is Described Now
The current system describes variation along two axes rather than sorting people into boxes.
The Two Core Domains
Diagnosis requires difficulties in all three areas of social communication and social interaction: social and emotional reciprocity, which covers social approach, back-and-forth conversation, and sharing interests; nonverbal communication used for social interaction, including eye contact, body language, and understanding gestures and facial expressions; and developing and maintaining relationships outside of caregiver relationships.
It also requires at least two of four restricted or repetitive patterns: stereotyped or repetitive speech, movements, or use of objects; rigid adherence to routines and distress at small changes; highly restricted interests with unusual intensity; and increased or decreased reactivity to sensory input, such as strong aversion to specific sounds or fascination with spinning objects.
That second criterion is where much of the visible variation comes from. A child can meet the threshold through sensory reactivity and routine rigidity while another meets it through repetitive movements and intense interests. Both are autistic. They look substantially different.
The Three Severity Levels
Alongside the diagnosis, clinicians assign a severity level describing how much support is needed.
Level 1: Requiring Support
Difficulty initiating social interactions, responses to others' social advances that may be unusual or unsuccessful, and what can appear as reduced interest in social interaction. Repetitive behaviors interfere with functioning to some degree, and there is some difficulty shifting away from fixed interests.
Level 2: Requiring Substantial Support
Marked delays in verbal and nonverbal communication. Limited interest in or ability to initiate social interaction, and difficulty forming relationships even with support in place. Restricted interests and repetitive behaviors are apparent to a casual observer and interfere across multiple contexts, with high distress when they are interrupted.
Level 3: Requiring Very Substantial Support
Severe impairment in daily functioning, very limited initiation of social interaction, minimal response to others' overtures, and potentially very limited verbal communication. Rituals and repetitive behaviors greatly interfere with functioning, and coping with change is extremely difficult.
Two points about levels are frequently missed. First, a level is assigned separately for each domain, so a child can be Level 1 in one and Level 2 in the other. Second, a level describes support needs at a point in time. It is a snapshot, not a permanent classification, and it can be reassessed.
Specifiers
Specifiers are the part of the diagnosis that carries much of the practical information, and they are the reason a level alone tells you relatively little. A diagnosis can record whether it occurs with or without accompanying intellectual impairment, with or without accompanying language impairment, in association with a known genetic or medical condition, and with or without another neurodevelopmental, mental, or behavioral condition.
The presence or absence of intellectual and language impairment often shapes a child's day more than the level number does. Two children both assigned Level 2, one with significant language impairment and one without, need different plans.
The Terms You Will Still Encounter
Formal consolidation did not remove these words from conversation, and knowing what people mean by them is genuinely useful.
- Asperger syndrome. No longer issued as a new diagnosis, but retained by many diagnosed adults as an identity term. Roughly, though not precisely, it corresponds to what would now be diagnosed as autism with lower support needs and without language or intellectual impairment. Clinical guidance cautions that mapping the old label onto Level 1 is loose rather than exact.
- High-functioning and low-functioning. These are not diagnostic terms and never were. Many autistic people object to them, because "high-functioning" tends to obscure real support needs while "low-functioning" obscures real abilities. Describing specific skills is more accurate and more useful than either.
- Profound autism. This is the significant recent development. In 2021, a Lancet Commission on the future of care and clinical research in autism formally introduced the term to describe autistic people with high-dependency needs. As reported by the Child Mind Institute, the designation covers people who have an IQ below 50 or are nonverbal or minimally verbal, who need help with daily living tasks, and who require round-the-clock support throughout life. A subsequent CDC analysis of records for more than 20,000 8-year-olds found that 26.7 percent of autistic children would meet the criteria.
The term is debated rather than settled. Supporters, including researchers and many parents of severely affected children, argue that the breadth of the single ASD diagnosis obscures this group's needs and that these children are routinely excluded from research. Critics, including the Autistic Self Advocacy Network, argue that it revives functioning labels that have historically harmed autistic people, and note that the existing specifiers for intellectual and language impairment were designed to capture this variation. Clinicians on the other side of that argument respond that the specifiers have not been adopted as intended in practice and are often not recognized by insurers.
The debate is worth knowing about because it explains why families encounter such different vocabulary depending on which organization they read.
Case Study: Same Level, Different Children
The following is a composite drawn from several families, with identifying details changed.
Two four-year-olds began services within a month of each other. Both arrived with the same documented diagnosis: autism spectrum disorder, Level 2, requiring substantial support.
- Child A: Spoke in short phrases and used them functionally to request. Assessment showed the primary barriers were transitions and sensory reactivity: leaving a preferred activity produced prolonged distress, and hand dryers and vacuum noise cleared the room. Social initiation with peers was present but rarely reciprocated successfully.
- Child B: Minimally verbal, using perhaps five-word approximations inconsistently. Transitions were largely uneventful. The primary barrier was that nearly every want had to be communicated through leading an adult by the hand or through escalation, because no reliable requesting repertoire existed.
- What the plans looked like: Child A's program centered on transition warning systems, choice-making, gradual sensory tolerance work embedded in real routines, and peer interaction targets. Child B's program centered almost entirely on functional communication: establishing a reliable requesting response first, using a picture system alongside vocal models, and building from there.
- The point: The label these two children shared predicted almost none of what their programs contained. What determined the programs was direct assessment of specific skills. This is the practical reason the search for a type is less useful than it feels: the type would not have told anyone what to do on Monday morning.
What Actually Drives a Child’s Program
If the label is not what determines support, it is fair to ask what does. Four things:
- Direct assessment of current skills across communication, play, social interaction, adaptive skills, and behavior, conducted through observation rather than inferred from a diagnosis.
- Family priorities, since what most needs to change in a specific household is not derivable from a diagnostic category.
- The function of any challenging behavior, which is determined through functional assessment and varies between children who look superficially similar.
- Response to teaching, measured through data over time, which is the only reliable guide to whether the current plan is right.
A label opens the door to services, and for insurance and school eligibility purposes, that matters enormously. Beyond that door, it does comparatively little work.
Further reading: The Child Mind Institute maintains a plain-language explainer, Understanding the Levels of Autism, which covers what the level assignments mean for diagnosis and support in more detail.
Understanding Your Child’s Profile, Not Just the Label
The different types of autism are, in current clinical terms, one diagnosis described through two domains, three severity levels, and a set of specifiers. The variation families notice is real, but it lives in the details of an individual profile rather than in categories, which is why two children with identical paperwork can need entirely different support.
Centerbrite builds programs from that profile rather than from the label. Every child receives a comprehensive assessment before goals are written, and the plan is designed and overseen by a BCBA who works directly with your child rather than reviewing reports from a distance. Sessions are play-based and paced by your child's assent, teaching happens inside your family's real routines, and parent training is part of every plan.
Centerbrite provides ABA services in Branchburg, NJ, across Bergen, Essex, and Morris counties. If you have a diagnostic report and are not sure what it means for your child specifically, contact us today. We are glad to walk through it with you.
Frequently Asked Questions
1. Does my child have a type of autism I should know the name of?
Not in the sense of a named subtype, because those are no longer assigned. What is worth knowing from the report is the severity level for each of the two domains and which specifiers were recorded, particularly whether accompanying intellectual or language impairment was noted. That combination describes your child's profile far better than any single category name.
2. My child was diagnosed with Asperger's years ago. Is that diagnosis still valid?
Yes. The consolidation applied to how new diagnoses are written, not retroactively to existing ones. Many people diagnosed under the older term continue to use it, and that is a personal choice rather than a clinical error.
3. Can my child's level change?
Levels describe support needs at the time of assessment, so a reassessment can produce a different level. It is worth being careful with expectations here: levels are not a progress metric, and a level that stays stable does not mean nothing has improved. Meaningful gains in daily functioning often occur without a change in the assigned number.
4. Why do so many websites still list four or five types of autism?
Because that content reflects the pre-2013 system and gets copied repeatedly without being checked against current criteria. It is not malicious, but it is out of date, and it leads families to search for a category their child will never be assigned.
5. Does the level determine what therapy my child receives?
Not directly. Eligibility for services generally follows from the autism diagnosis itself, and the content of a treatment plan should follow from direct assessment of your child's specific skills. A provider who describes a standard program for a given level is not individualizing, which is a departure from practice standards.
Sources:
- https://www.research.chop.edu/car-autism-roadmap/diagnostic-criteria-for-autism-spectrum-disorder-in-the-dsm-5
- https://www.cdc.gov/autism/diagnosis/index.html
- https://childmind.org/article/what-is-profound-autism/
- https://childmind.org/article/understanding-the-levels-of-autism/
- https://www.pexels.com/photo/two-children-playing-with-lego-blocks-and-other-toys-3661450/
