If you're asking "how do I get an ADHD assessment as an adult in the UK?", the honest answer is that it depends on where you live, how long you're prepared to wait, and what options you're willing to explore. Most adults who suspect they have ADHD assume the NHS will sort them out within a reasonable timeframe. The reality is harder to sit with: in many parts of England, the standard waiting list for an adult ADHD assessment runs to two, three, sometimes five years. In Herefordshire and Worcestershire, the recorded wait is over ten years. In Leeds, the service has temporarily stopped accepting new referrals entirely.
This is not a criticism of the NHS. It is simply the situation, and you deserve to know it upfront. There are three main routes to an adult ADHD assessment: the standard NHS pathway, the NHS Right to Choose scheme (available in England), and private assessment. Understanding which route fits your circumstances can save you years of uncertainty. This guide covers all three, including what to say to your GP, what evidence you need, and what the assessment actually involves.
The standard NHS pathway and why most adults hit a wall
Everything begins with your GP. You book an appointment, describe your symptoms, and ask for a referral to your local NHS mental health team or neurodevelopmental service. Your GP does not diagnose ADHD; they assess whether a referral is clinically appropriate and, if so, submit one. From that point, you wait.
The national picture for waiting times is stark. Across England, waits range from around 46 weeks in areas like the Black Country to over two years in South East London, with some regions sitting closer to five years for a standard assessment slot. According to NHS England figures, over 700,000 people are currently waiting for an ADHD assessment in England, and the NHS constitution's 18-week treatment target does not apply to ADHD services. For a working adult whose relationships, career, and mental health are deteriorating while they queue, that timeline is not a viable option.
The Right to Choose scheme exists precisely because of this problem, but it is worth knowing about it before you even walk into your GP surgery.
How do I get an ADHD assessment as an adult in the UK through the NHS Right to Choose scheme?
If you are registered with a GP in England, you have a legal right to request a referral to any approved independent provider that holds an active NHS Standard Contract, rather than defaulting to your local service. The assessment is fully NHS-funded. You pay nothing.
Providers who currently hold active NHS contracts for adult ADHD assessments include Psychiatry UK, ADHD360, RTN Mental Health, ProblemShared, Harrow Health, and CARE ADHD, among others. Contract status can change, so it is worth verifying each provider's current availability on their website before your GP appointment. Some providers offer assessment plus treatment, including shared care and medication titration; others are assessment-only. This distinction matters, because if your chosen provider does not offer ongoing treatment, you will need a second referral for that stage. Most Right to Choose providers publish their referral cover letter directly on their website, download it, fill in your details, and bring it to your appointment.
Right to Choose waits are significantly shorter than the standard pathway, typically running at eight to ten months from referral to assessment. Some Integrated Care Boards have placed restrictions on referral volumes, which can extend this, but it remains a meaningful shortcut compared with the standard adult ADHD diagnostic pathway. One important note: Right to Choose currently applies in England only. If you are in Scotland, Wales, or Northern Ireland, the pathway differs and you will need to check your local NHS guidance.
How to talk to your GP and what to say
Preparation makes this conversation considerably more straightforward. Before the appointment, complete the Adult ADHD Self-Report Scale (ASRS), a standardised symptom checklist your GP will recognise. Download the Right to Choose referral cover letter from your preferred provider's website, fill in your details, and bring it with you. If you have kept any notes on how your symptoms affect your work, daily routines, or relationships, bring those too. A short symptom diary kept in the weeks before your appointment is worth more than a vague description on the day.
In the appointment itself, be specific about impact rather than symptoms in isolation. A useful opening is: "I would like to be referred for an adult ADHD assessment. My symptoms are significantly affecting my work and daily life, and I have completed the ASRS form and a Right to Choose cover letter to support this." If your GP raises local waiting times as a reason to hesitate, respond directly: "I understand the local list is long. Under the Right to Choose legislation, I have the legal right to request a referral to a provider of my choice that holds an NHS contract, such as [provider name]. There is no additional cost to the NHS beyond their existing contract."
Clarify that you cannot self-refer; the referral must come from the GP via the NHS eReferral Service. If your GP declines, ask for a second GP at the same practice. If the refusal is on clinical grounds, ask for the reasoning in writing. If a referral was submitted but you have not heard from the provider after ten weeks, contact the surgery to check whether the referral was returned incomplete.
Going private: costs, timelines, and where specialist clinics fit in
Private assessments cost more, but they are considerably faster. Assessment-only options start from around £360 to £400 at providers such as MyPace and Care ADHD, though prices change and it is worth checking each provider's website for current figures. Comprehensive packages including a year of ongoing care run from £950 to £2,850 at providers such as ADHD360. Medication costs are separate, typically around £65 per month for the prescription plus prescribing and monitoring fees from the clinic. Total first-year costs for a standard private ADHD assessment in the UK tend to land somewhere between £2,000 and £3,000.
On timelines, some online providers offer slots within 24 hours to seven working days for priority bookings. Standard appointments at most private clinics take three to five weeks from booking to assessment. That gap between weeks and years is what drives the decision for many adults. When your ability to function at work or maintain relationships is genuinely at stake, the cost calculus shifts.
Inkind Psychology Clinic offers comprehensive adult ADHD assessments conducted by qualified psychologists using clinically rigorous methods. Assessments are available both online and in person, with a personalised approach from the first contact through to the diagnostic report. For adults who cannot afford to wait years for clarity, Inkind Psychology Clinic provides a professional pathway that does not compromise on clinical quality. You can find out more and book a consultation directly through the Inkind Psychology Clinic website.
What the ADHD assessment actually involves
The clinical requirement for an adult ADHD diagnosis is that symptoms must have been present before age 12. This means the assessment process reaches into your past as well as your present. Useful childhood evidence includes old school reports with teacher comments, corroborating accounts from parents or close relatives, and specific examples of difficulties from early life. You do not need a childhood diagnosis; you need to demonstrate that the pattern has been there for a long time.
Specialists use a standard set of tools throughout the assessment. The ASRS screens for current symptom severity. The DIVA (Diagnostic Interview for ADHD in Adults) provides the structured interview framework, ensuring all DSM-5 criteria are systematically explored. The W-FIRS (Weiss Functional Impairment Rating Scale) assesses how symptoms affect key life domains, including work, education, and home life. Together, these instruments give the clinician a rounded picture rather than a single snapshot. A diagnosis under DSM-5 requires at least five symptoms from either the inattention or the hyperactivity-impulsivity cluster, with significant impairment across at least two areas of life.
The session itself is a structured conversation lasting between 45 and 90 minutes with a specialist psychiatrist or psychologist. A collateral contact, typically a family member or partner, may be asked to provide additional history. It is not a pass-or-fail test; it is a clinical picture built from multiple sources.
What happens after your assessment
If you receive an ADHD diagnosis, a formal written report is produced and the next step is a conversation about whether medication, therapy, or a combination of both is appropriate for your situation. In the private route, the prescribing clinician handles medication initially. Once a shared care agreement is in place, your NHS GP takes over ongoing prescriptions.
GPs are not obligated to accept private diagnoses, and acceptance is at GP discretion, some will enter a shared care agreement, others may not. If your GP is reluctant, ask them to outline their position in writing and, if necessary, seek a second opinion within the practice.
If ADHD is ruled out, that is still a useful outcome. Conditions that commonly present alongside or instead of ADHD, including anxiety, depression, and autism, are frequently identified during the assessment process. You leave with a clearer picture regardless, and that clarity points toward the right support.
The immediate next step is simply to decide which route matches your situation. If you are going the NHS route, complete the ASRS form and book a GP appointment with your Right to Choose cover letter ready. If you are considering a private assessment, book a consultation. The decision does not need to be complicated. The hardest part is usually starting.
The system is under pressure, but options exist
Adults waiting years for a diagnosis are not failing. The system is under extraordinary pressure, and that pressure has real consequences for real people. The options outlined here, Right to Choose, private assessment, or a combination of both, exist precisely because the standard pathway cannot carry the demand alone. For a broader view of national waiting lists and service pressures, see this ADHD UK waiting lists report.
So if you are still wondering how do I get an ADHD assessment as an adult in the UK, the practical answer is this: complete the ASRS, book a GP appointment, and go in knowing your options. Whether that means navigating Right to Choose with a well-prepared referral request or accessing a specialist clinic such as Inkind Psychology Clinic for a faster, professional assessment, the path forward is available. You do not have to wait indefinitely for an answer.
