Autism assessment UK: how to get one and what to expect

Autism assessment UK: how do you ask for one?

You start with your GP. The NHS says GPs can refer both children and adults to a local autism team. For a child, the school may need to make the referral, and a health visitor may do it if the child is not yet school age. A mental health professional can also refer you if they notice signs of autism while you are getting help for something else.

NHS 111 Wales adds a practical tip: bring a written list of the signs you have noticed. Specific examples from work, home and relationships give a GP something concrete to refer on.

We have not been through the process ourselves, and this is not medical advice. Everything here comes from the official pages in the sources list, checked on 26 October 2026. Rules and waits move, so confirm with your GP.

What happens at an autism assessment?

A team of professionals carries it out, and you may have one or more appointments. For adults the NHS says the team may:

• ask you to complete questionnaires
• ask about your behaviour with others, your early life, and your home, work or college life
• speak to someone who knew you as a child and someone who knows you now
• review GP reports and documents such as school reports or workplace assessments

For children the team may ask about development and medical history, watch how the child plays and communicates, check for conditions that often sit alongside autism such as ADHD or epilepsy, review reports from nursery or school, and sometimes visit the school.

At the end you receive a report. The NHS says it states whether you are autistic, your strengths and support needs, and any other conditions found. A follow-up appointment may come weeks or months later, and you may be given a care plan or information, including support for parents, family or carers.

How long is the wait for an autism assessment?

The official wording is "a few months or longer" after a referral is accepted, according to the NHS. NHS 111 Wales says you may wait a few months and that waits can be very long.

National data gives a harder picture. NHS England Digital's Autism Statistics for July 2025 to June 2026, published on 13 August 2026, report 294,792 patients with an open referral for suspected autism at the end of June 2026, and 17,509 new referrals that month. Of the open referrals, 256,017 (86.8%) had been open for at least 13 weeks, and the page refers to a recommended 13 weeks for a first appointment.

Read those numbers with the caveats NHS England Digital attaches:

• The series is labelled experimental, as official statistics in development.
• One provider, the Owl Centre, made no timely June submission and is recorded as zero, so the June total is likely understated.
• Autism assessments done in community paediatric services cannot yet be identified in the data and are not included, so the picture for children is incomplete.
• The page does not report median waiting times, and it gives no split between adults and children, so we have none to quote.

We have not seen an official page that gives a typical wait for your area. Your GP practice or the autism service itself is the place to ask.

What is Right to Choose for an autism assessment?

In England you can choose which NHS service carries out the assessment. The NHS autism page says you may pick one with shorter waits. NHS England's patient choice guidance names autism spectrum disorder and ADHD assessments as examples of services that may be delivered remotely under these rules.

The conditions come from that guidance. The provider must hold a qualifying NHS contract, and the referral comes from a GP, dentist or optometrist, so self-referral is excluded. The guidance also excludes urgent and crisis care, people already receiving care for the same condition, and people detained under the Mental Health Act 1983, in prison, or serving in the armed forces. A GP is not required to refer if they judge it would not be appropriate, and the guidance asks referrers to aim for a shortlist of about five choices where practical.

It does not say whether the providers offer support after diagnosis, so ask the provider what follows the report before you choose.

We do not name providers. The list changes, and it is not ours to vouch for.

How do England, Scotland, Wales and Northern Ireland differ?

The first step is the same in all four, which is the GP. The detail beyond that varies, and some official pages are short.

For Northern Ireland, nidirect also says several independent providers operate there, costs vary, and you should check whether your trust accepts their reports and whether follow-up support is offered. It points to Autism NI and the National Autistic Society in Northern Ireland for advice.

We found no mention of Right to Choose on the Scottish, Welsh or Northern Irish pages, so do not assume it applies there.

Can you pay for an autism assessment?

Yes. The NHS says that if you disagree with a result you can pay for an assessment by a professional outside the NHS, and nidirect says private providers operate in Northern Ireland. We could not find an official page with private prices, so we do not quote any, and we do not recommend providers.

Before paying, ask your GP or local service whether they will accept the report. The nidirect page says exactly that for Northern Ireland, and it is a sensible question anywhere.

Things to know

• Refusal is not final. The NHS says you can ask another professional, such as a different GP, for a second opinion.
• Support may be available while you wait. NHS 111 Wales lists local support groups, a speech and language therapy referral for a child, the National Autistic Society services directory, school or university support services, your employer, and a needs assessment from your local council. For children, our EHCP guide covers education support.
• England's rules may not travel. Right to Choose is described by NHS England and the English NHS page, not by the other three nations' pages we read.
• The data is incomplete. The figures above are officially labelled experimental and miss some providers and children's community services.
• This is information, not advice. If you are unsure where to start, talk to your GP.