A complete guide to what you can expect to pay for an ADHD assessment in the United Kingdom and the United States, including NHS and private options, online assessments, and practical ways to reduce the cost.
The cost of an ADHD assessment varies significantly depending on where you live, whether you access public or private healthcare, the type of clinician carrying out the assessment, and how comprehensive the evaluation needs to be. What is consistent across both the UK and the USA is that demand for ADHD assessments has risen sharply over the last decade, creating lengthy waiting lists in public health systems and a growing private sector that comes at a considerable cost to patients.
In the United Kingdom, the average cost of a private ADHD assessment is around £1,200 for adults and £1,050 for children, though prices range from £530 at the lower end to over £2,300 for the most comprehensive evaluations. In the United States, the picture is broader, with basic ADHD screenings starting at around $200 and full neuropsychological evaluations costing anywhere from $1,500 to $5,000 or more depending on the provider and location.
Both countries offer publicly funded routes. In the UK, NHS ADHD assessments are available at no cost to the patient, but waiting times can stretch from several months to over ten years in the worst-affected areas. In the USA, Medicaid and Medicare may cover ADHD testing when it is deemed medically necessary, and many private insurance plans offer partial or full coverage, though significant variation exists between plans and providers.
The United Kingdom offers two main routes to an ADHD assessment: through the National Health Service (NHS) or through a private provider. The right route for you will depend on your circumstances, how urgently you need an assessment, and what you can afford.
NHS ADHD assessments are free at the point of use and represent the gold standard for most patients. However, the demand for these services has outpaced NHS capacity significantly. Waiting times vary enormously across England, Scotland, Wales, and Northern Ireland. Some patients wait between three and six months, while in areas such as Herefordshire and Worcestershire, waiting lists of over 550 weeks (more than ten years) have been reported. The average NHS adult ADHD waiting time in England is around two to three years.
For many adults and children who are struggling to function in daily life, work, or education, waiting years for a diagnosis is not a realistic option. This is why so many people in the UK now turn to private providers for an ADHD assessment.
Private ADHD assessment costs in the UK differ noticeably by region, reflecting local running costs, the availability of qualified ADHD specialists, and the level of demand in each area.
| Region | Average Adult Cost | Typical Range | Average Child Cost |
|---|---|---|---|
| London | £1,400 | £900 to £2,000 | £1,419 |
| South East | £1,300 | £850 to £1,800 | £1,419 |
| East of England | £1,331 | £800 to £1,700 | £1,350 |
| Midlands | £1,100 | £750 to £1,500 | £1,271 |
| North England | £950 | £650 to £1,400 | £1,374 |
| Scotland | £1,200 | £800 to £1,600 | £1,300 |
| Wales | £900 | £600 to £1,300 | £1,100 |
| Northern Ireland | £936 | £700 to £1,400 | £993 |
London consistently ranks as the most expensive area for private ADHD assessments, with adult evaluations averaging around £1,400. Northern Ireland offers the most affordable private rates in the UK, with adult assessments averaging £936 and follow-up consultations the lowest nationwide at around £116. Many patients from higher-cost regions find it worthwhile to travel for assessments.
A comprehensive private ADHD assessment in the UK will typically include a structured clinical interview based on DSM-5 and ICD-11 criteria, a review of developmental and medical history, standardised questionnaires completed by the patient and, in the case of children, by parents and teachers as well, and a written diagnostic report. Follow-up appointments to discuss medication options or begin titration are usually charged separately at between £150 and £325 depending on the provider and format.
Right to Choose (England only): English patients can use the NHS Right to Choose scheme to access an ADHD assessment through an approved private provider, such as Psychiatry UK, fully funded by the NHS. This can significantly reduce waiting times compared to a standard NHS referral. Ask your GP about this option.
In the United States, the cost of ADHD testing is shaped by several factors unique to the American healthcare system, including insurance coverage, provider credentials, geographic location, and the scope of the evaluation. Unlike the UK, there is no universal public healthcare system offering free ADHD assessments. Instead, patients rely on private insurance, Medicaid, Medicare, or self-funding.
The cost of ADHD testing in the USA spans a very wide range. At the lower end, a brief clinical diagnostic screening with a general practitioner or psychiatrist may cost between $200 and $500. A mid-range evaluation by a licensed psychologist, including standardised testing and a written report, typically costs between $1,000 and $2,500. At the upper end, a full neuropsychological evaluation conducted by a specialist clinical psychologist can cost $3,000 to $5,000 or more, particularly in major metropolitan areas such as New York, San Francisco, or Los Angeles.
| Type of Assessment | Typical Cost Range | Who Provides It |
|---|---|---|
| Brief Diagnostic Screening | $200 to $500 | GP, psychiatrist |
| Standard ADHD Evaluation | $500 to $1,500 | Psychologist, therapist |
| Comprehensive Evaluation | $1,500 to $3,000 | Clinical psychologist |
| Full Neuropsychological Assessment | $3,000 to $5,000+ | Neuropsychologist |
| University / Sliding Scale Clinic | $300 to $1,500 | Supervised trainee clinicians |
Whether your insurance covers ADHD testing depends on your specific plan, the provider's network status, and whether the evaluation is deemed medically necessary. Most insurance plans do cover ADHD diagnostic assessments when the testing is carried out by a qualified provider and the clinical need is documented. In-network providers will usually result in lower out-of-pocket costs than out-of-network providers, who may offer what is known as a superbill, which you can submit to your insurer for partial reimbursement.
Under federal law, public schools in the USA must provide ADHD evaluations at no cost to families when there is reason to suspect the condition affects the child's education. School-based testing focuses on educational impact and accommodation eligibility. It may not provide the clinical diagnosis required for medication management, which is why some families also pursue private assessments.
Psychology graduate programmes across the USA operate training clinics that offer comprehensive ADHD evaluations at significantly reduced rates, typically $300 to $1,500. Assessments are conducted by doctoral students under direct supervision from licensed psychologists. Wait times can be longer, but the quality of the report is generally appropriate for school accommodations and treatment purposes.
Online ADHD assessments have become increasingly common in both the UK and the USA, particularly since 2020. They offer a number of practical and financial advantages over traditional face-to-face assessments and are now considered clinically appropriate for the majority of adult ADHD cases.
Online assessments typically cost between 15% and 30% less than equivalent in-person evaluations. In the UK, this means an online adult ADHD assessment might cost £700 to £1,000 compared to £900 to £1,400 for an in-person equivalent. In the USA, many telehealth ADHD evaluations are priced between $500 and $1,500 for a comprehensive assessment, compared to $1,500 to $3,000 or more for in-person options.
It is important to confirm that the online provider is properly regulated and that their assessment will be accepted by your GP or prescriber for the purposes of medication, workplace accommodations, or educational support. In the UK, look for providers registered with the Care Quality Commission (CQC). In the USA, confirm the provider is licensed in your state.
The cost of a private ADHD assessment can feel prohibitive, particularly for those who are already struggling with the impact of undiagnosed ADHD on their work, relationships, and quality of life. There are, however, several practical ways to reduce or spread the cost.
At AttentionDeficitTest.com we offer a clinically-informed 100-question ADHD assessment for a one-time fee of £2.99. Our assessment covers 20 domains including attention and focus, working memory, impulsivity, emotional regulation, time management, hyperfocus, sleep, childhood history, and more. It takes approximately 18 minutes to complete and delivers personalised results instantly after payment.
Our assessment is not a clinical diagnosis and cannot replace a formal evaluation by a qualified clinician. What it does is give you a detailed, personalised picture of your attention profile across 20 symptom domains, a clear indication of whether your results suggest a low, moderate, or high likelihood of ADHD, and specific recommended next steps based on your score, including guidance on whether a professional consultation may be appropriate.
For those whose results suggest a moderate or high likelihood of ADHD, we also offer professional consultation packages starting from £149, delivered via secure video call by licensed assessors with ADHD expertise.
Detailed answers to the most commonly asked questions about the cost of ADHD assessments in the UK and USA. For more, visit our Frequently Asked Questions page.
General Cost Questions
The cost of an ADHD assessment varies significantly by country, provider type, and scope of the evaluation. Here is a broad summary:
ADHD assessments command significant fees because of the level of clinical expertise, time, and regulatory compliance required to carry them out properly. The costs reflect:
Yes, online ADHD assessments are generally cheaper than in-person assessments. In the UK, online private assessments typically cost 15 to 30% less, meaning you might pay £700 to £1,000 online compared to £900 to £1,400 for an equivalent face-to-face evaluation. In the USA, telehealth ADHD evaluations often cost $500 to $1,500 compared to $1,500 to $3,000 or more for in-person assessments.
Online assessments are considered clinically appropriate for most adult ADHD cases and increasingly for children too. The key is to ensure the provider is properly regulated, that their assessment methodology is clinically sound, and that their reports will be accepted by your GP, prescriber, employer, or educational institution for the purposes you need.
ADHD Assessment Cost, United Kingdom
Yes, NHS ADHD assessments are free at the point of use for both adults and children in the UK. To access one, you need a referral from your GP. However, waiting times vary enormously across different NHS trusts:
If you cannot wait, private assessment is an option, and our £2.99 assessment is a quick and affordable first step to understanding your attention profile before committing to a full clinical evaluation.
Private ADHD assessment costs in the UK as of 2025 are as follows:
A Shared Care Agreement (SCA) is an arrangement where, after a private ADHD diagnosis, your NHS GP agrees to take over prescribing your ADHD medication at NHS prescription rates (£9.90 per item in England), rather than you continuing to pay private prescription costs which can reach £90 to £125 per month per medication.
GPs have no legal obligation to enter a Shared Care Agreement and acceptance rates vary significantly by region:
Yes. The NHS Right to Choose (RTC) scheme is available in England and allows patients to choose an NHS-funded ADHD assessment through an approved private provider rather than waiting for a standard NHS referral. Providers such as Psychiatry UK participate in the scheme.
Key points about Right to Choose for ADHD:
ADHD Assessment Cost, United States
Without insurance, ADHD testing costs in the USA vary widely depending on the type of evaluation and the provider. Here is a breakdown of typical out-of-pocket costs:
HSA and FSA funds can be used to pay for ADHD testing and can reduce your effective cost by 25 to 30% depending on your tax bracket.
Many US health insurance plans do cover ADHD testing, but coverage depends on your specific plan, whether the provider is in-network, and whether the testing is classified as medically necessary. Here are the key points to understand:
A comprehensive ADHD evaluation in the USA conducted by a licensed clinical psychologist or neuropsychologist will typically include:
Full evaluations typically require four to eight hours of face-to-face testing time, often spread across multiple sessions, plus additional clinician time for scoring, interpretation, and report writing.
Yes, ADHD assessment costs vary noticeably by location across the USA. The main factors influencing regional price differences include the local cost of living, the availability of qualified providers, and the degree of competition in the local market. In general:
Our Assessment
Our £2.99 assessment is a 100-question clinically-informed ADHD evaluation that covers 20 symptom domains. Upon completing all 100 questions, you pay £2.99 and your personalised results are revealed immediately. Your results include:
This assessment is not a clinical diagnosis and cannot replace a formal evaluation by a qualified clinician. It is a meaningful, evidence-informed starting point that helps you understand your attention profile and decide whether a formal assessment is appropriate.
No. Our assessment is an informational self-assessment tool, not a clinical diagnosis. No online assessment, regardless of how comprehensive or clinically-informed it may be, can replace a formal evaluation carried out by a qualified healthcare professional such as a consultant psychiatrist, clinical psychologist, or specialist nurse practitioner.
Our assessment is best understood as a detailed, personalised starting point. It helps you understand your attention profile across 20 domains, indicates whether ADHD traits appear to be present and to what degree, and gives you clear guidance on whether a professional assessment may be appropriate for your situation. If your results indicate a high likelihood of ADHD, we recommend discussing those results with your GP or booking a professional consultation through our platform.
After completing all 100 questions, you are taken to a payment screen where you pay £2.99 to unlock your results. Once payment is confirmed, your personalised results are displayed immediately. From there, based on your results, you have several options:
Take our clinically-informed 100-question ADHD assessment for just £2.99. Instant personalised results across 20 symptom domains, with clear next steps based on your score.
Start Assessment →At Attention Deficit Test, our ADHD resource library covers every aspect of ADHD, from understanding symptoms and types to navigating diagnosis, treatment, and related conditions.