How to get assessed for ADHD or autism as an adult

Short answer

Adult assessment for ADHD or autism is carried out by a qualified professional through a structured evaluation of your history, not by a single test. In most countries the route starts with a doctor who refers you onward, though who is allowed to assess and who pays differs a lot. The pattern that repeats almost everywhere is the wait. Public systems are backlogged, private assessment costs money, and adults are frequently deprioritised behind children. This page describes the route in general terms, then what is specific to a few countries. It is information, not medical advice. NeuroType cannot assess you or refer you.

Who can actually assess you

This is the first thing that differs by country, and getting it wrong wastes months.

In the United States, evaluation can be carried out by a range of licensed professionals. Psychiatrists, psychologists, neurologists, primary care providers, nurse practitioners, and some licensed counsellors and social workers all assess for ADHD, depending on state rules and the setting. One practical distinction matters: psychologists generally cannot prescribe medication, while psychiatrists and other medical prescribers can. Autism evaluation for adults is more specialised and fewer clinicians offer it.

In the United Kingdom, ADHD and autism assessment for adults is done by specialist services, and your GP refers you rather than assessing you.

In Australia, adult ADHD assessment is largely carried out privately, usually by psychiatrists, because public mental health services generally do not provide it. Autism assessment is often multidisciplinary.

In Canada, the route commonly runs through a family doctor to a psychiatrist or psychologist, with availability and public coverage varying by province.

In Ireland, adults typically go through either the public system or private clinics, and the gap between the two in waiting time is wide.

Wherever you are, the underlying principle is the same. There is no blood test, scan, or online quiz that diagnoses either condition. The assessment is a structured look at long standing patterns, how they show up across different settings, and what effect they have on daily life.

Why the wait is long almost everywhere

Adults seeking assessment have collided with the same bottleneck in most high income countries: referrals rose sharply, assessment capacity did not, and adult services were thinner to begin with.

Two properly sourced data points give a sense of the scale. NHS England Digital reported up to 803,658 open referrals that may be for an ADHD assessment in England as at March 2026. Separately, a 2025 study in Autism Research covering ten of fourteen Scottish health boards found a median wait of 252 days for adults, roughly eight and a half months, with only 47 percent of adult assessments meeting the proposed 252 day target. Children waited considerably longer at a median of 525 days.

Both figures need reading carefully. The England number counts open referrals that may be for an assessment rather than a confirmed national waiting list, and the Scottish study is Scottish. Neither is a global figure, and nobody publishes a reliable global one.

Elsewhere the shape is similar even where the numbers are not published. In Australia, the practical consequence of public services generally not assessing adult ADHD is that most people pay privately and wait months. In Canada and Ireland, public waits vary widely by region and are commonly measured in many months to years, with private routes much faster and much more expensive.

The honest summary: if you are being told to expect years, that is not unusual, and it is not because your case is unimportant.

Country specific things worth knowing

United States. Cost and coverage are the main barriers rather than a queue. Check whether an evaluation is covered by your insurance and at what rate before booking, since coverage for adult assessment varies. Lower cost routes exist and are underused: university training clinics attached to psychology and medical programmes, community mental health centres, and clinicians offering sliding scale fees. Some academic hospitals run research programmes that include assessment.

England. If your GP refers you for a first outpatient appointment, in most cases you have a legal right to choose the provider, and this covers mental health referrals. Exceptions apply, including onward referrals for care you are already receiving and urgent treatment. Say you want to choose at the point of referral rather than afterwards, and check the current local position, because arrangements differ by area and some areas have added restrictions.

Scotland, Wales, and Northern Ireland. Administered separately from England. Do not assume English arrangements, including provider choice, apply.

Australia. Expect to go private for adult ADHD and expect a psychiatrist to be involved. Ask what Medicare rebate applies, if any, and get the total cost including follow up in writing before committing.

Canada. Provincial coverage differs substantially. Ask your family doctor what is publicly covered where you live and what the realistic wait is, before deciding whether to pay privately.

Ireland. The gap between public and private waiting times is large. If you are considering private, check the assessor's qualifications and what happens afterwards regarding ongoing care.

Everywhere else. The two questions that unlock the local picture are: which profession is permitted to diagnose adults here, and who pays. Your national ADHD or autism organisation is usually the fastest way to get an accurate answer.

If you are considering paying

Private assessment is a legitimate route in most countries and a private diagnosis is a real diagnosis. The things that catch people out are rarely about quality, they are about what happens next.

Before paying, check four things. Who exactly carries out the assessment and what their registration is. Whether the service follows recognised national guidance for your country. What the fee covers, and whether follow up, reports, or medication review are extra. And most importantly, what happens afterwards: whether your public system or usual doctor will accept the diagnosis and take over any ongoing care, because that is not guaranteed and varies by region.

Ask that last question before you pay, not after. It is the single most common source of expensive disappointment.

What actually helps while you wait

Most content about assessment is written either for people deciding whether to seek one or for people who already have a diagnosis. Almost nothing is written for the very large group in between, waiting, sometimes for years.

A few things genuinely help in that gap.

Keep a written record as you go. An assessment will ask about patterns across your whole life, and notes made while things are happening are far more accurate than memories reconstructed on the day.

Record specific incidents rather than conclusions. What happened, roughly when, and what it cost you in time, money, or energy.

Find evidence of early patterns while it still exists. School reports, old appraisals, and family recollection get harder to retrieve every year.

Ask what support is available without a diagnosis. Workplace adjustments, study support, and general strategies often do not require a formal diagnosis first, though this varies by country and employer.

And treat online self assessment carefully, including this site. Working through structured reflection prompts can help you organise your own account and notice patterns you had not put words to. It carries no clinical weight, it does not confirm or rule out any condition, and it will not move you up a queue. What it can do is make sure that when your appointment finally arrives, you can describe your life accurately instead of whatever you happen to remember in the room.

Source and review status

This article is original NeuroType editorial content written in plain English. Waiting figures are dated and attributed in the text: the England referral figure comes from NHS England Digital management information, and the Scottish median comes from a 2025 study in Autism Research. Descriptions of who can assess adults draw on published guidance from NICE, the CDC, and the National Institute of Mental Health. Country arrangements, costs, coverage, and rules change frequently and vary locally, so treat this as orientation and check the current position with a qualified professional or your national organisation before acting. This is information, not medical advice, and it does not confirm or rule out any condition. Corrections can be sent to hello@neurotype.app.