Patient guide
Autism assessment for children and young people: the UK pathway
Autism assessment for children involves a team looking at development, communication, play and behaviour across home and school. Waiting times for NHS assessment are often long, and families sometimes consider other routes. This guide describes the pathway, the roles involved and what support exists before and after diagnosis.
Last checked: 2026-10-03
Key facts
At a glance.
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Guidance
NICE guideline CG128 describes recognition, referral and diagnosis of autism in under 19s, with a local multidisciplinary autism team.
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Concerns come first
Parents, nurseries, health visitors and teachers can raise concerns and start the process.
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Support does not depend on diagnosis
Schools and services should respond to a child's needs while waiting.
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Waiting times
They vary significantly by area and can be long, so ask about current estimates and interim support.
Early signs that prompt concern
Signs differ by age. In young children they may include limited eye contact, not responding to their name, delayed or unusual speech, little pretend play, strong preferences for routine and distress over small changes. In older children, difficulties with friendships, intense interests, sensory sensitivities, rigid thinking and anxiety may be more evident. Some autistic children, especially girls, may not be recognised until later, because they mask or cope in structured settings.
Who is involved
The assessment is usually led by a team that may include a paediatrician or child psychiatrist, a speech and language therapist, a psychologist and an occupational therapist. The team gathers information from parents, school and the child. A developmental history is taken, covering milestones, language, play, behaviour and sensory responses. Observations of the child, sometimes in school or nursery, form part of the picture.
Typical steps
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Referral by GP, health visitor, school or parent, depending on local arrangements.
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Initial triage and gathering of information from school or nursery.
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A developmental interview with parents or carers.
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Direct observation and structured assessment of the child.
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Consideration of other conditions, such as language disorder, hearing difficulties, ADHD or anxiety.
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A feedback meeting and a written report with recommendations.
While you wait
Do not wait for a diagnosis before asking for support. Talk with the school's special educational needs coordinator about adjustments, such as a quiet space, visual timetables and predictable routines. Ask about local parent workshops. If your child has significant needs, you can ask the local authority about an Education, Health and Care needs assessment in England. Keep a diary of behaviours and strengths to share with clinicians.
Other routes
In England, parents may use Right to Choose where available, and private assessment is also possible. A private report is not automatically accepted by schools or local authorities for all purposes, so ask the provider about its approach and how reports are used. Check qualifications and whether assessment follows recognised guidance.
After a diagnosis
Diagnosis offers an explanation, access to information and support groups and a basis for requesting adjustments. It does not prescribe a single intervention. Support may include speech and language therapy, occupational therapy, behaviour and parent programmes, school support and treatment of co-occurring conditions such as anxiety or sleep problems. Review needs regularly as your child develops.
Preparing for the assessment appointments
Bring a list of your child's early milestones, any health visitor or nursery records, examples of daily routines and the things that cause distress or joy. Think about how you will describe sensory responses, such as to noise, textures or food. If your child is old enough, prepare them gently by explaining that they are meeting people who want to understand how they think and feel. Ask about reasonable adjustments at the clinic, such as a quiet room or a shorter first session, so that your child can show their usual strengths.
Frequently asked
Questions people ask.
Quick, plain-English answers to the questions we hear most.
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At what age can autism be diagnosed?
Signs may be seen in toddlers, and diagnosis can be made in early childhood. Many children are diagnosed later, including as teenagers.
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Does my child need a diagnosis for school support?
No. Schools should provide support according to need.
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Will my child be assessed in school?
Often the team will seek school input or observe there, because behaviour across settings matters.
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What if my child masks at school?
Tell the team. Reports of exhaustion or meltdowns at home after school can indicate masking.
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Are girls assessed differently?
Assessors increasingly consider how autism can present in girls, who may be diagnosed later.
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What is an EHC plan?
In England, an Education, Health and Care plan is a legal document describing support for a child with significant special educational needs.
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Can I ask for a second opinion?
Yes, if you disagree with an outcome, you can ask for clarification or review through your GP or the service.
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Is autism the same as ADHD?
No, but they often co-occur, and assessment may consider both.
Where this comes from
Sources and checking.
This guide is for information, not medical advice.
Your GP or consultant knows your history and can tell you which parts apply to you. If your symptoms are severe, rapidly worsening, or come with red-flag features, seek urgent medical care. Figures and availability change, so treat them as a guide and confirm with the provider.
Published 2026-10-03, next review 2027-10-03.
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NICE guideline CG128, Autism spectrum disorder in under 19s: recognition, referral and diagnosis (nice.org.uk)
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NHS website, Autism pages (nhs.uk)
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NHS England, Your choice of provider: Right to Choose guidance (england.nhs.uk)
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Equality Act 2010 and EHRC guidance on reasonable adjustments (equalityhumanrights.com)