If you’re somewhere between “wondering if you might have ADHD” and “exhausted from trying to navigate the NHS,” the wait you’re facing is real and documented — you’re not imagining it. The NHS England ADHD Taskforce final report, published November 2025, found that some people wait more than two years for an ADHD assessment, and in some areas waits have grown to 10 to 15 years.
This is a practical, source-cited guide to ADHD assessment waiting times in the UK in 2026 — NHS, Right to Choose, private — and what to do while you wait. Updated quarterly.
How long is the waiting list for an ADHD assessment in the UK in 2026?
Adult ADHD assessment waits in the UK in 2026 range from one to five years on standard NHS routes, with some regions reporting 10+ years.
The honest answer is “the waiting list” doesn’t exist as a single number. It depends on where you live, your referral route, and which provider you end up with. Here is the 2026 picture across the three main pathways:
| Route | Typical wait (May 2026) | Cost to you | Who delivers it |
| Standard NHS referral | 2 years to 10+ years, ICB-dependent | Free | Local NHS adult ADHD service |
| NHS Right to Choose (England only) | 6 to 18 months | Free | Approved private providers (e.g. ADHD 360, Psychiatry-UK, Clinical Partners) |
| Self-funded private | 1 to 6 weeks | £400 to £1,500+ for assessment (see cost breakdown) | CQC-registered private clinics |
For the most current Right to Choose wait times by provider,ADHD UK maintains a live data hub fed by Freedom of Information requests. Their figures shift quarterly. Treat any single number you read online — including mine — as a snapshot, not a guarantee.
How long does the NHS wait for an ADHD assessment?
NHS adult ADHD assessment waits average around two years, but exceed 10 years in some areas, per the 2025 NHS England ADHD Taskforce final report.
The Taskforce report, published 6 November 2025 and chaired by Professor Anita Thapar, found that ADHD is “under-recognised, under-diagnosed and under-treated.” It estimates that around 2–3% of UK adults have ADHD, but only about 15% of adults with ADHD are receiving medication — far below the 70–90% who clinical evidence suggests would benefit. The Taskforce also warned that very long NHS waits are creating a two-tier system, in which the people most disadvantaged by untreated ADHD are also least able to afford private assessment.
The reasons are not a mystery. Demand has risen sharply since the pandemic, particularly from adult women whose ADHD was missed in childhood, while workforce supply has not kept pace — Royal College of Psychiatrists CR235 reported that 32% of psychiatrists surveyed felt not confident assessing ADHD, and 67% wanted further training. Local commissioning by Integrated Care Boards (ICBs) creates the wide regional variation.
A note for Sussex readers. If you live in Brighton, Hove, Lewes, Woodingdean or anywhere across East or West Sussex, your standard NHS adult ADHD pathway is commissioned by Sussex Partnership NHS Foundation Trust. Rather than quote a single Sussex figure that would be out of date by the time you read it, the best step is to check the current Sussex wait via ADHD UK’s FOI database or by contacting your GP practice directly.
What is NHS Right to Choose for ADHD, and how long does it take?
NHS Right to Choose lets adults in England choose any NHS-funded provider, typically shortening ADHD assessment waits to 6–18 months.
Right to Choose is your legal right, under the NHS Constitution in England, to ask your GP to refer you to any provider that holds an NHS Standard Contract for the service you need. For ADHD that means a small group of approved private providers who deliver assessments under NHS funding — at no cost to you.
The three most commonly used Right to Choose providers and their May 2026 wait estimates:
- ADHD 360: Right to Choose waits vary significantly by ICB, with some areas operating under local activity plans that cap monthly bookings. Currently in the region of 8–14 months for many ICBs.
- Psychiatry-UK: typically 12 to 18 months, depending on demand and ICB-level capacity caps.
- Clinical Partners: estimates updated 27 January 2026 onward, with most patients waiting 12 to 18 months; some ICBs are now operating under Indicative Activity Plans that may extend this.
These figures are accurate as of May 2026 and will shift. Always check the provider’s own waiting-times page before requesting a referral.
How to ask your GP for a Right to Choose referral
A simple, polite, scripted request usually works:
“Under the NHS Right to Choose framework, I would like to be referred to [provider name] for an ADHD assessment. Their service holds an NHS Standard Contract. Please could you send the referral?”
ADHD UK publishes a template referral letter you can take to your appointment. If your GP refuses without giving a clinical reason, ask for the refusal in writing — that’s a reasonable request and it forces the practice to articulate its position. If the refusal cites an ICB-level policy, you can write to your ICB and ask whether that policy formally prohibits Right to Choose or whether it is guidance the practice has chosen to interpret restrictively.
The honest caveat. Right to Choose is under pressure in 2026. Some ICBs have introduced local Indicative Activity Plans that cap how many assessments approved providers can deliver each month for that ICB’s residents. This doesn’t take away your legal right, but it can extend the practical wait. The Taskforce final report has flagged this as a national concern.
How long does a private ADHD assessment take to arrange?
A private ADHD assessment can usually be arranged within 1 to 6 weeks of enquiry, with the assessment itself taking 60 to 90 minutes.
The private pathway has four stages:
- Initial enquiry and pre-assessment questionnaires — usually 1–2 weeks after you book. You’ll complete validated screening tools (commonly the ASRS, Wender Utah Rating Scale) and a developmental history questionnaire.
- The assessment appointment — 60 to 90 minutes with a consultant psychiatrist or other appropriately qualified specialist, typically via video for an online ADHD assessment or in person.
- The written diagnostic report — produced within 1–2 weeks of the appointment and shared with your GP if you consent.
- Treatment planning and titration — if you choose to start medication, this typically takes 8–12 weeks of monthly reviews while a clinician finds the right medication and dose.
A defensible private assessment, in line with NICE NG87, should take at least 60 minutes of direct interview time and use validated diagnostic instruments such as the Diagnostic Interview for ADHD in Adults (DIVA-5) or the ACE+. Shorter, cheaper assessments exist; they are not generally defensible against NICE standards.
If cost is your concern, we’ve published a separatebreakdown of what a private ADHD assessment actually costs in the UK in 2026, including the red flags to watch for before paying any clinic.
Make an Appointment with Flint Healthcare →
Autism assessment waiting times: how do they compare?
NHS autism assessment waits for adults generally exceed ADHD waits, ranging from 2 to 5 years, with some ICBs reporting 7+ years.
NICE Quality Standard QS51 sets the expectation that any adult referred for autism assessment should have it started within three months of referral. In practice, that standard is not currently being met in most NHS areas. NHS Digital’s Autism Waiting Time Statistics consistently show median waits of well over a year, and many ICBs report waits in the multi-year range.
A few practical points if you’re considering an autism assessment alongside or instead of ADHD:
- The two conditions co-occur often. Estimates vary, but somewhere between 30% and 50% of autistic adults also meet criteria for ADHD, and vice versa. Many people benefit from a combined assessment rather than two separate ones.
- Right to Choose covers autism in England, but the approved-provider list is smaller than for ADHD.
- A defensible adult autism assessment uses NICE CG142-aligned tools — typically the ADOS-2 or ADI-R, plus a structured developmental history.
If a combined picture is clinically indicated, private autism assessment alongside ADHD assessment is usually the most efficient route.
What to do while you wait for an ADHD assessment
While you wait, document symptoms, request reasonable adjustments at work or study, find peer support through ADHD UK, and avoid unvalidated online quizzes.
Waiting is the hardest part of the process for many adults, especially if work, education, or relationships are already under strain. None of the following replaces an assessment, but each is genuinely useful in the meantime:
Keep a structured symptom log. Track concrete examples of inattention, impulsivity, and hyperactivity — when they happened, what the consequence was, and what you tried. The DIVA-5 framework groups these into the DSM-5 symptom domains, so structuring your log around those domains makes the eventual assessment more efficient. Note childhood examples too — diagnostic criteria require symptoms to have been present before age 12.
Request workplace reasonable adjustments. You don’t need a formal diagnosis to request adjustments under the Equality Act 2010 if you have a long-term condition with significant impact. Common adjustments include written follow-ups after verbal instructions, agreed quiet working time, flexible start times, and noise-cancelling headphones. Speak to your line manager or occupational health.
Apply for educational adjustments if you’re a student. Universities and colleges can put adjustments in place through their disability services, and you can apply for Disabled Students’ Allowances (DSA) on the basis of suspected or diagnosed ADHD. Funding can cover study coaches, software, and equipment.
Find peer support. ADHD UK and AADD-UK both run free or low-cost adult ADHD support communities. Talking to other people on the waiting list is, one of the most consistently helpful things you can do.
Look after the basics that ADHD makes harder. Sleep, regular eating, and movement all measurably affect attention and emotional regulation. These aren’t a substitute for treatment, but they reduce the volume of symptoms while you wait.
A safeguarding note. Do not buy unregulated stimulants online. The General Medical Council and MHRA have both repeatedly warned that online medication marketplaces sell unverified, often counterfeit, and sometimes dangerous products. They are also illegal to purchase in the UK without a prescription. If you are struggling and considering this, please speak to your GP, contact NHS 111, or call Samaritans on 116 123.
How to choose between waiting on the NHS and going private
Choose private if NHS waits in your area exceed 12 months, you can access a CQC-registered consultant-led service, and the cost is sustainable longer-term.
This is a financial and clinical decision, and there’s no universally right answer. Here’s an honest framework:
Stay on the standard NHS route if you can manage daily life and work for the duration of the wait, financial strain from private fees would create real hardship, or you have complex co-occurring conditions (significant trauma, eating disorder, severe mood disorder) where an NHS multidisciplinary team is genuinely the right service. The standard NHS route is free, follows NICE NG87, and is fully integrated with your GP and any other NHS care you receive.
Use Right to Choose if you live in England, your standard NHS wait exceeds 12 months, and you can tolerate a wait of 6 to 18 months with an approved private provider funded by the NHS. This is genuinely the best-value route for most adults in England who can wait that long.
Go fully private if NHS and Right to Choose waits in your area both exceed 12 months and ADHD is actively damaging your work, studies, finances or relationships; you can afford not only the assessment but also the follow-up and titration costs; and you can verify the clinic against the red-flag checklist (CQC registration, GMC-registered consultant psychiatrist, NICE NG87-aligned process, validated diagnostic tools, written formulation). Our separate post on private ADHD assessment cost in the UK walks through this in detail.
The factor that matters most over the long term is continuity of care. ADHD is a long-term condition. The clinician who assesses you, prescribes for you, titrates your medication, and reviews you over the next several years has a much better picture of your situation than a series of different clinicians at different services. That’s worth weighing alongside price and wait time.
Make an Appointment with Flint Healthcare →
ADHD assessment in Brighton, Hove and online with Flint Healthcare
Flint Healthcare offers consultant-led private ADHD assessment in Brighton (Woodingdean) and online across the UK, typically within 2 to 4 weeks of enquiry.
We’re a CQC-registered, consultant-led service. Every adult ADHD assessment at Flint is conducted by a consultant psychiatrist on the GMC specialist register, uses DIVA-5 alongside validated rating scales, and produces a written diagnostic formulation suitable for your GP, employer or university.
We see patients in person in Brighton, Hove, Rottingdean, Saltdean, Woodingdean, Lewes and Kemptown, and online for patients anywhere in the UK. The clinician who assesses you is the clinician who titrates your medication and reviews you afterwards — that continuity of care is the whole point.
For local context, Sussex Partnership NHS Foundation Trust is the NHS provider for adult ADHD assessment across most of Sussex. If you’re weighing routes, we’re happy to talk through the decision with you before you commit to either path. You can read more about our team, or make an appointment. For Brighton, call 01273 468848. For London, call 020 4617 6042.
Frequently asked questions
How long does an ADHD assessment take in 2026?
A defensible adult ADHD assessment takes 60 to 90 minutes of direct interview time, plus pre-assessment questionnaires before and a written diagnostic report 1–2 weeks afterwards.
What is the 10-3 rule for ADHD?
The “10-3 rule” is not a diagnostic criterion. It’s a self-management technique — work for 10 minutes, take a 3-minute break, repeat — that some adults with ADHD use to manage executive-function demands. It has no formal place in NICE NG87 or DSM-5 diagnostic criteria. DSM-5 diagnosis requires onset of several symptoms before age 12, symptoms in two or more settings, and clinically significant impairment.
What is the 5-3-1 rule for ADHD?
The 5-3-1 rule (also written as 1-3-5) is a non-clinical productivity mnemonic popularised on social media: one big task, three medium tasks, and five small tasks per day. It is not a diagnostic tool and has no clinical evidence base. Validated tools used in actual ADHD diagnosis include the DIVA-5, ACE+, and structured rating scales such as the ASRS.
Do people with ADHD get fibromyalgia?
There is published evidence of elevated ADHD prevalence among adults with fibromyalgia. Studies across several countries have found that between 24% and 45% of fibromyalgia patients screen positive for adult ADHD, compared with around 5% in the general population (see Pain Medicine, 2018 and PMC review, 2024). The relationship is associational rather than causal, and the Royal College of Physicians has suggested screening for ADHD in fibromyalgia patients as good practice.
Can I get a private ADHD assessment online in the UK?
Yes. Video-based assessments are recognised by NICE and the Royal College of Psychiatrists when conducted by an appropriately qualified consultant psychiatrist using validated tools. They are typically 10–15% cheaper than in-person assessments and often the more practical option for adults outside major cities.
How do I get my GP to refer me under Right to Choose?
Bring a printed referral request quoting your right under the NHS Constitution, naming the approved provider you’ve chosen, and stating that the provider holds an NHS Standard Contract. ADHD UK publishes a template letter. If the GP refuses, ask for the refusal in writing.
In summary
ADHD assessment waits in the UK in 2026 are long, regionally uneven, and genuinely frustrating. Standard NHS is free but can take years; Right to Choose is faster and still free in England, but under capacity pressure; private is fastest but has real cost implications and quality varies more than price suggests. The right choice depends on where you live, what you can afford, and whether you can find a service that delivers continuity of care.
If you’d like to talk through which route is right for you, make an appointment — the first conversation costs you nothing, and we’ll tell you honestly if private isn’t your best option.
If you are in crisis, please contact Samaritans on 116 123 (free, 24/7) or call 999.
