Key facts
What you need to know before reading on:
- NHS ADHD assessment waits currently run from 2 to 8 years in most parts of England
- Private assessments are available within 2 to 6 weeks and typically cost £500 to £1,400 for adults
- A third option exists: NHS Right to Choose, which is NHS-funded but uses a private provider, with current waits of around 6 to 18 months
- After any private or Right to Choose diagnosis, your GP will need to agree to shared care for ongoing prescriptions — and some refuse
- There is no single right answer. The best choice depends on your timeline, budget and local area
In this article
- The honest state of NHS ADHD assessment in 2026
- Option 1: The standard NHS route
- Option 2: NHS Right to Choose
- Option 3: Private assessment
- The hidden cost nobody talks about — shared care
- Which option is right for you?
- What to do next
Introduction: A question with no single answer
If you are trying to get an ADHD assessment in the UK in 2026, you are facing a choice that feels far more complicated than it should be.
Do you join the NHS waiting list and wait years? Pay hundreds or thousands of pounds to go private? Or pursue something called Right to Choose that most people have never heard of?
The honest answer is: it depends. On where you live. On your budget. On whether you have children or are an adult. On what your GP is likely to do after a diagnosis.
This guide sets out exactly what each option involves, what it costs, how long it takes, and the critical question most other guides skip entirely: what happens after diagnosis?
Every figure in this post is sourced from verified, current data. We have linked to our sources at the bottom.
The honest state of NHS ADHD assessment in 2026
Before comparing options, it helps to understand why this choice is so difficult in the first place.
Referrals for ADHD assessment have increased by over 400% in the last decade. NHS services, staffed by specialist psychiatrists and nurses who take years to train, have not grown at anything close to the same rate. The result is a fundamental imbalance between demand and capacity that is not going to resolve quickly.
As of 2026, approximately 668,370 people are on a formal NHS ADHD waiting list in England. That figure is almost certainly an undercount, since many GPs are reluctant to add patients to waiting lists they know will take years to clear, and many people give up and seek private help without ever entering the NHS system.
400%+ increase in ADHD assessment referrals over the last decade. Source: Compare ADHD Clinics, April 2026.
This is the context in which you are making your decision. None of the options are perfect. They all involve tradeoffs. What follows is an honest account of each one.
Option 1: The standard NHS route
What it involves
You visit your GP, describe your difficulties, and ask for a referral to your local NHS ADHD service. If your GP agrees, you go on a waiting list for an assessment with a specialist, usually a consultant psychiatrist or specialist nurse. The assessment itself typically takes around 90 minutes for adults and involves a detailed psychiatric interview, gathering of historical evidence and ruling out other conditions.
How long it takes
This is where the NHS route becomes genuinely difficult to recommend without caveats.
The average waiting time for an initial adult ADHD assessment via the standard NHS pathway is over two years across the UK. While some areas might quote 18 to 24 months, it is not uncommon for patients in regions like Kent, Sussex, and parts of London to be told the wait is between 5 and 7 years.
There is also what some call the hidden wait. The official waiting time often starts after your GP has successfully referred you to a specialist service, a process which can itself take several months.
What it costs
Nothing, directly. Assessment, titration, follow-ups and ongoing prescriptions are all covered by the NHS at the standard prescription charge (£9.90 per item as of 2026, or free if you are exempt).
The advantages
The NHS route provides fully integrated care. If you are diagnosed, titration and ongoing medication management happen within the same system. There is no shared care negotiation with your GP because you are already in-house. You also have access to the wider NHS ecosystem including psychology and occupational therapy if needed.
The disadvantages
The wait. For most people in England in 2026, two to five years is the realistic expectation. Some areas are significantly worse. If your ADHD is affecting your work, your relationships, your mental health or your children's schooling right now, that wait has real consequences.
Option 2: NHS Right to Choose
What it involves
Right to Choose is a legal right under the NHS Constitution in England. It allows you to ask your GP to refer you to an approved private provider for your ADHD assessment, with the NHS funding the entire cost. You bypass your local NHS waiting list and access a national network of approved providers instead.
Most people have never been told this exists. Your GP is not obligated to mention it. But you are entitled to request it, and your GP cannot refuse without a specific clinical reason.
How long it takes
In 2026, waiting times for popular Right to Choose providers currently sit between 12 and 18 months. This is significantly faster than the standard NHS route in most areas, though it is not instant.
There is an important complication. For April 2026 to March 2027, a number of ICBs have set reduced activity levels, which affects the number of appointments providers are able to offer to patients in those areas. This may mean waiting times could be longer than standard waiting times, and in some cases could extend beyond March 2027.
This means: some NHS areas are restricting Right to Choose referrals, which means your local experience may vary significantly from the national average. Always check the current position for your specific ICB area before assuming Right to Choose will be straightforward.
What it costs
Nothing. The assessment is fully NHS-funded. You pay nothing for the assessment or any subsequent titration through the Right to Choose provider.
The advantages
It is the closest thing to a free shortcut that exists within the NHS system. You get a private provider's assessment quality and flexibility, funded by the NHS. For most people in England on long local waiting lists, this is the most cost-effective faster option available.
The disadvantages
Waits are still significant at 12 to 18 months with major providers. Some ICBs are restricting access. And the post-diagnosis shared care question (covered below) applies just as much to Right to Choose as to fully private assessments.
Right to Choose is available in England only. It does not apply in Scotland, Wales or Northern Ireland.
Option 3: Private assessment
What it involves
You book directly with a private ADHD assessment provider without a GP referral in most cases. The assessment process is broadly the same as NHS, typically around 90 minutes for adults, involving a detailed clinical interview, rating scales and collateral history. You receive a written diagnostic report, usually within two to four weeks.
How long it takes
Most private clinics offer appointments within 2 to 6 weeks. This is the fastest route available in 2026 by a significant margin.
What it costs
A private adult assessment typically costs between £800 and £1,400. Initial assessment: £700 to £1,200. Titration: £80 to £150 per month. Follow-ups: £150 to £250 per session.
This is the upfront cost. The total cost over the first year, including assessment, titration and follow-ups, can run to several thousand pounds if you are not able to move to NHS shared care prescribing.
One important note on the lower end of the market: assessment quality matters enormously for what happens next. Under NICE guidelines, both Consultant Psychiatrists and Specialist Nurse Prescribers can diagnose and treat ADHD, and both are valid for NHS shared care if they hold Independent Prescriber status. Always check that your chosen provider is CQC-registered and that their clinicians hold the appropriate qualifications, since a poorly conducted assessment may not be accepted for shared care by your GP, meaning you pay twice.
The advantages
Speed is the primary advantage. For someone whose ADHD is significantly affecting their life right now, accessing an assessment within weeks rather than years has real, measurable value.
The disadvantages
Cost. And the shared care question, which is so significant it deserves its own section.
The hidden cost nobody talks about: shared care
This is the part of the private assessment conversation that most guides either skip or bury at the end. We are putting it here because it genuinely affects whether the private route is worth it for you.
After a private or Right to Choose diagnosis, you will be prescribed ADHD medication and go through a titration process to find the right dose. This is typically managed by your private provider for an initial period.
But for ongoing repeat prescriptions, most people want their NHS GP to take over. This is called a shared care agreement. It keeps your monthly medication costs at the standard NHS prescription charge (£9.90) rather than the £80 to £150 a month you would pay for private prescriptions.
Here is the problem. Not all GPs agree to shared care. NHS England guidance states that GPs should not refuse shared care solely because a diagnosis was made privately, but in practice refusal rates vary significantly by area, by GP practice and by individual GP.
If your GP refuses shared care, your options are limited: pay for ongoing private prescriptions, find a new GP, or pursue an NHS diagnosis alongside your private one. None of these are straightforward.
Before you commit to a private assessment, check whether your GP surgery is known to accept shared care. Our free GP Shared Care Checker shows patient-reported data on GP surgeries across the UK. It takes 30 seconds to check. If your surgery is known to refuse, you can have that conversation with your GP before spending £800 to £1,400 on an assessment.
Which option is right for you?
If you are in England and have been on the NHS waiting list for more than 6 months: Right to Choose is almost certainly worth pursuing. It is free, it is faster than your local list, and your GP cannot refuse without a clinical reason. Use our free Right to Choose calculator to get a personalised recommendation for your situation.
If you are in England and have just been referred: Check your local area's waiting time first. Right to Choose waits of 12 to 18 months may or may not be faster than your local service. Our calculator accounts for this.
If you need a diagnosis urgently and can afford it: Private assessment within 2 to 6 weeks is the fastest route. But check your GP's shared care position first using our checker, and make sure your chosen provider is CQC-registered and that their clinicians are qualified to provide a diagnosis that your GP will accept.
If you are in Scotland, Wales or Northern Ireland: Right to Choose does not apply to you. Your options are the standard NHS route or private assessment. Use our triage tool to find the right pathway for your location.
If cost is the main barrier: The standard NHS route or Right to Choose are your options. Right to Choose is faster and still free. If you cannot wait, some private providers offer payment plans. Our clinic directory shows payment plan availability for each listed provider.
If this is for a child: All three options apply in principle, but the children's pathway for Right to Choose is more complex. Not all providers assess children, and the process involves additional input from parents and schools. Our triage tool has a specific pathway for parents seeking assessment for their child.
What to do next
The right next step depends entirely on your situation. Rather than trying to work it out from a general guide, our free 3-minute triage tool asks you a few specific questions and gives you a personalised recommendation.
If you already know you want to explore Right to Choose, our Right to Choose calculator tells you honestly whether it makes sense for your specific situation, including current wait time data and any local ICB restrictions.
If you are considering a private assessment and want to know whether your GP will accept shared care afterwards, check your surgery on the shared care checker before you book.
Everything on Path To Diagnosis is free. No clinic pays to be recommended. No referral fees affect which options we show you.
This article is based on data from NHS England, the Independent Review into Mental Health Conditions, ADHD and Autism (June 2026), ADHD Clinic Finder, Compare ADHD Clinics, and Psychiatry UK's published waiting time data. All sources are linked below. Last reviewed: July 2026. This article is for general information only and is not a substitute for medical advice.
Sources
Psychiatry UK. Waiting Times Update. Updated July 2026. psychiatry-uk.com/waiting-times-update
ADHD Clinic Finder. NHS ADHD Waiting Times UK 2026. Updated March 2026. adhdclinicfinder.com/blog/nhs-adhd-waiting-times-uk
Compare ADHD Clinics. NHS ADHD Waiting Times 2026. Updated April 2026. compareadhdclinics.co.uk/nhs-waiting-times
Independent Review into Mental Health Conditions, ADHD and Autism: Interim Report. Published 10 June 2026. Department of Health and Social Care. gov.uk — interim report
National Institute for Health and Care Excellence. ADHD: diagnosis and management. NICE Guideline NG87. 2018. nice.org.uk/guidance/ng87
NHS England. Patient Choice Guidance. Published 19 December 2023. england.nhs.uk — patient choice guidance
Last reviewed: 13 July 2026