Private ADHD Assessment UK: Costs, Process, and How to Decide

Getting an ADHD assessment on the NHS is free. It can also take years. Private assessment costs money and takes weeks. The right choice depends on where you live, how long you can reasonably wait, and what your GP will do afterwards. This guide covers all of it.

Why so many people are going private

The scale of the NHS ADHD waiting list is not well understood outside of those living it. NHS England Digital data from December 2025 recorded up to 735,000 open ADHD assessment referrals in England. Around 61% of adults on those waiting lists had already been waiting for more than a year. The independent ADHD Taskforce, commissioned by NHS England in 2024, found that 40% of commissioners and primary care clinicians surveyed reported waiting times of two years or more, with some areas reporting waits of ten to fifteen years.

Those figures are not a critique of NHS clinicians, who are working in a system overwhelmed by demand that has grown faster than it can be resourced. But they do explain why private assessment exists as a practical option for many people, and why understanding both routes properly matters before committing to either.

Three routes to an ADHD assessment

It is worth being clear from the outset that there are three routes available, not two. Each works differently, costs differently, and suits different situations.

The standard NHS pathway means your GP refers you to a local adult mental health or neurodevelopmental service. Assessment is free and clinically integrated with local care, but you join a waiting list that in many areas runs to years.

NHS Right to Choose is available to patients registered with a GP in England. You have a legal right to ask your GP to refer you to an NHS-contracted private provider rather than your local service. The assessment is NHS-funded; if medication follows, you pay standard NHS prescription charges. Waiting times are shorter than the standard pathway in most areas, though some Integrated Care Boards have introduced regional restrictions from 2024 onwards. The Right to Choose route is covered in full in our separate guide to NHS Right to Choose for ADHD.

A fully private assessment means paying out of pocket, with no GP referral needed. You choose the provider, the timing, and the clinician. Assessment typically happens within days to a few weeks of enquiry. The trade-off is cost, both for the assessment itself and potentially for ongoing medication if your GP will not take over prescribing afterwards.

The rest of this guide focuses on the private route: what it costs, what it involves, who carries it out, and how to decide whether it is the right call for your situation.

How much does a private ADHD assessment cost in the UK?

Cost varies considerably depending on who carries out the assessment, whether it is in-person or via video, and the complexity of the case. The figures below reflect the current UK market as of 2026.

Adult assessments

Private ADHD assessments for adults typically range from £400 to £1,700. The lower end reflects assessments carried out by specialist nurse prescribers with ADHD-specific accreditation. The higher end reflects assessments by consultant psychiatrists, particularly in-person in London and other major cities. The market average sits around £1,100 to £1,200, though online options have brought costs down at some providers.

Children’s assessments

Children’s assessments tend to cost more: roughly £650 to £1,600, with an average around £1,050. This reflects additional clinical time, the need for input from school and parents, and the multi-session structure most paediatric assessments require.

All of the figures above cover the diagnostic assessment and written report only. They do not include medication titration or follow-up appointments, which are charged separately and can add £500 to £1,000 or more over the course of treatment.

The medication cost most people do not plan for

Once ADHD medication is initiated following a diagnosis, the expectation under NICE guidance is that ongoing prescribing eventually transfers to your GP under a Shared Care Agreement (a formal arrangement where your GP takes over routine prescribing and monitoring while the specialist provides periodic clinical oversight). If that arrangement is in place, you pay the standard NHS prescription charge, currently £9.90 per item in England. If it is not, you continue to pay for private prescriptions, which typically cost £50 to £100 per month depending on medication type and dose.

The difference over twelve months is up to £1,090. That is a significant ongoing cost that many people do not factor in when budgeting for the assessment itself. Whether your GP will accept shared care after a private diagnosis is not guaranteed, and is covered in detail below.

Does private health insurance cover ADHD assessment?

Usually not. Most major UK insurers exclude ADHD as a pre-existing neurodevelopmental condition from standard policies. Some policies with enhanced mental health cover may provide partial reimbursement, but this is the exception rather than the rule and typically requires pre-authorisation. Check your specific policy terms before assuming coverage.

What does a good private ADHD assessment involve?

Not all private assessments are clinically equivalent, and this matters more than the price difference might suggest. The quality of the assessment affects both the reliability of the diagnosis and whether your GP will accept it afterwards.

What should be included

A thorough private ADHD assessment, whether carried out by a specialist nurse prescriber or a consultant psychiatrist, should include all of the following:

• A structured clinical interview covering current symptoms and their functional impact across different areas of life, including work, relationships, and daily tasks
• A developmental and psychiatric history, including childhood behaviour and any prior diagnoses or mental health history
• Standardised diagnostic tools such as the DIVA-5 (Diagnostic Interview for ADHD in Adults) or equivalent validated scales based on DSM-5 or ICD-11 criteria
• Collateral information where possible, typically a questionnaire completed by someone who knew the patient in childhood, such as a parent, partner, or older sibling
• Screening for conditions that can present similarly to ADHD or coexist with it, including anxiety, depression, autism, and sleep disorders
• A comprehensive written report that explicitly references NICE NG87 diagnostic criteria, states the diagnostic rationale clearly, and includes all raw data from rating scales

The clinical interview alone should take a minimum of one to two hours of direct contact time. An assessment based primarily on a short online questionnaire and a twenty-minute video call does not meet NICE standards, regardless of how it is presented.

What to check before booking

Before committing to a provider, it is worth confirming these points directly:

• Is the provider registered with the Care Quality Commission (CQC)?
• Is the assessing clinician GMC-registered or regulated by an equivalent professional body?
• Does the provider explicitly state that they follow NICE NG87 in their diagnostic process?
• Does the assessment include collateral history from someone who knew the patient in childhood?
• Can the provider explain how they support the transition to GP prescribing after diagnosis?

A provider that cannot answer these questions clearly is one to approach with caution. A diagnosis that does not hold up to GP scrutiny can create significant problems for medication access down the line.

Specialist nurse prescriber or consultant psychiatrist: which do you need?

Most of the private ADHD assessment market has shifted significantly towards specialist nurse prescribers in recent years. Can a nurse prescriber give you a diagnosis your GP will accept? In most cases, yes. NHS guidance confirms that ADHD diagnosis can be made by a specialist psychiatrist, paediatrician, or other appropriately qualified healthcare professional with training and expertise in the condition. A specialist nurse prescriber who holds ADHD-specific accreditation and follows NICE NG87 meets that standard.

The distinction that matters is clinical complexity. A consultant psychiatrist brings a different level of seniority and is better placed to manage presentations where ADHD overlaps with other conditions, such as comorbid anxiety or depression, possible autism, a history of trauma, or medication contraindications. For a straightforward adult presentation with no significant comorbidities and no complex medication history, a specialist nurse assessment is entirely appropriate and will usually cost less.

For more complex cases, the psychiatrist option provides higher-level clinical oversight from the outset, and the resulting report tends to carry more weight with cautious GPs considering whether to take on ongoing prescribing.

Our psychiatrists carry out comprehensive assessments for both adult and childhood presentations. Where a case is complex or where you want the certainty of consultant-level seniority from the start, that option is available. The Private Therapy Clinic offers both a specialist nurse prescriber assessment at £400 for adults and children, and a consultant psychiatrist assessment at £495 for adults and £900 for children, with both options including medication prescribing from the first follow-up appointment. Full details are on our ADHD assessment page.

If you are unsure which level of assessment is right for your situation, a short screening call with a clinician before booking can help. We offer a £9.99 psychological screening call for exactly this purpose.

Will my GP accept a private ADHD diagnosis?

This is the question most people ask after a private assessment, when it would have been far more useful to ask it before.

The legal position

GPs are not obligated to accept a private ADHD diagnosis or to enter a Shared Care Agreement for medication. It is described in NHS guidance as a professional courtesy, not a statutory obligation. A GP must be satisfied that the diagnosis was made by a healthcare professional with appropriate training and expertise, and that the medication recommended is appropriate, necessary, and safe for the individual patient. They can decline if they are not satisfied.

The practical reality

In practice, a thorough assessment report from a CQC-registered provider, carried out by an appropriately credentialled clinician and explicitly mapped to NICE NG87 criteria, is accepted by most GPs. But some practices and ICB areas have formal policies declining shared care for privately diagnosed patients entirely, citing governance concerns or local prescribing guidance. Some ICBs have issued instructions that recommendations for NHS prescribing must come from an NHS specialist rather than a private one, regardless of assessment quality.

It is also worth knowing that if your assessment is through the NHS Right to Choose pathway rather than a fully private route, GPs are generally more willing to accept shared care. A Right to Choose diagnosis comes from an NHS-contracted provider operating within NHS governance structures; a fully private assessment sits outside that framework, and the GP’s discretion is wider.

What to do before booking

Have the conversation with your GP before booking a private assessment, not after. Ask directly whether the practice will enter a Shared Care Agreement for ADHD medication initiated by a private provider. If the answer is no or uncertain, your options are to use the Right to Choose route instead, to change GP before proceeding, or to proceed privately with a clear understanding that you may need to cover ongoing medication costs yourself.

Is private ADHD assessment worth it?

For many people, yes. The costs of undiagnosed ADHD are real: employment instability, relationship difficulties, and the toll of years spent not understanding your own brain. A private assessment that costs £400 to £900 and leads to treatment within weeks rather than years is, for many people, clearly worth it. This is particularly true for adults whose symptoms are affecting their ability to work or study, or for families whose children are struggling at school.

For others, the calculation is different. Someone in England with a cooperative GP and access to a Right to Choose provider that is not currently restricted in their area can access a fully NHS-funded assessment within months. Paying privately when that route is accessible and moving adds cost without adding meaningful clinical benefit.

When private makes sense

The variables that push the decision toward a fully private assessment include:

• You are based outside England, where Right to Choose is not available
• Your ICB area has paused Right to Choose referrals
• Your GP will not engage with the NHS referral process
• Symptoms are causing significant and urgent harm to work, education, or relationships
• Your presentation is complex and you want a consultant psychiatrist assessment from the outset
• Speed matters enough to justify the cost

If you are weighing the two NHS routes against each other before deciding whether private is necessary, our guide to NHS Right to Choose for ADHD covers the current state of that pathway, including the regional restrictions that apply in some areas as of 2026.

What happens after a private ADHD diagnosis?

A diagnosis is the beginning of a process, not the end of one.

Medication and prescribing

If medication is appropriate, the private provider initiates it and manages the titration phase, which typically runs over several weeks to a few months. Once the dose is stable, the provider will usually propose a Shared Care Agreement to your GP, requesting that routine prescribing and monitoring transfer to primary care. If your GP accepts, prescriptions move to NHS cost going forward. If not, you continue to receive prescriptions from the private provider, typically at the private prescription costs set out above.

Other support a diagnosis opens up

Beyond medication, a diagnosis gives access to support that many people are not aware of. ADHD is a protected characteristic under the Equality Act 2010, meaning reasonable adjustments can be requested from employers or educational institutions. Depending on what the assessment reveals, coaching, therapy adapted for ADHD, or further assessment for co-occurring conditions may also be recommended. Our blog on ADHD and emotional dysregulation covers some of the areas that often surface in the months after diagnosis and is worth reading if you are still in the information-gathering stage.

If you have already been assessed privately and want the NHS route

Having a previous private ADHD assessment does not close off the NHS Right to Choose pathway for ongoing care. You can still be referred under Right to Choose for the same condition if the original assessment was private rather than NHS-funded, which means a private diagnosis does not necessarily rule out NHS medication management going forward.

For most people, the process after diagnosis is more manageable than the process of getting one. Knowing what you are dealing with, having a name for it, and having a clear treatment plan makes the steps that follow more navigable, even where prescribing arrangements take time to settle.

Frequently Asked Questions

How long is the NHS waiting list for ADHD in 2026?

NHS England Digital data from December 2025 recorded up to 735,000 open ADHD assessment referrals in England, with 61% of adults having waited over a year. The independent ADHD Taskforce found that some areas report waits of ten to fifteen years. The Right to Choose route can significantly reduce this, though waiting times vary by provider and area.

Can I use NHS and private assessment at the same time?

You can. Being on an NHS waiting list and pursuing a private assessment simultaneously is permitted. Some people do this to keep a place on the NHS list as a safeguard while pursuing faster private access. There is no rule preventing it.

What is the difference between a specialist nurse prescriber and psychiatrist ADHD assessment?

Both can carry out a valid ADHD assessment and make a diagnosis under NICE NG87 provided they hold appropriate accreditation and follow the correct clinical process. The practical difference is clinical seniority and the handling of complexity. A consultant psychiatrist is better suited to cases with significant comorbidities or complex medication histories. A specialist nurse prescriber is appropriate for many straightforward adult presentations and is typically less expensive.

Does private health insurance cover ADHD assessment?

Usually not. ADHD is typically classified as a pre-existing neurodevelopmental condition and excluded from standard private medical insurance policies. Some enhanced mental health policies may offer partial cover. Check your specific policy and seek pre-authorisation before assuming it applies.

Will my GP accept a private ADHD diagnosis?

Most GPs will consider it if the assessment was carried out by a credentialled clinician following NICE NG87 and the report is thorough. However, GPs are not legally obliged to do so, and some practices and ICB areas have policies declining this for privately diagnosed patients. Ask your GP before booking a private assessment, not after.

What should a good ADHD assessment report contain?

A clear diagnostic statement referencing DSM-5 or ICD-11 criteria, a full developmental and psychiatric history, completed standardised rating scales with raw data, evidence of functional impairment across settings, screening for comorbid conditions, and treatment recommendations. The report should explicitly reference NICE NG87.

How The Private Therapy Clinic can help

The Private Therapy Clinic offers private ADHD assessments for adults and children, carried out by specialist nurse prescribers or consultant psychiatrists depending on the level of assessment required. We also offer the NHS Right to Choose pathway for patients registered with a GP in England who want an NHS-funded route.

If you are not yet sure which option fits your situation, a £9.99 psychological screening call gives you a brief conversation with a clinician who can help you work through the options, understand costs and waiting times, and point you toward the right next step. Sometimes having one informed conversation at the start saves a lot of confusion later.