If you are researching private assessment for ADHD or autism, this is probably one of the first questions you have found yourself asking.
With NHS waiting lists running into years in many parts of the UK, going private has gone from unusual to mainstream. But does it actually carry the same weight as a diagnosis from the NHS?
The honest answer is: when it is done properly, yes. But the question deserves a fuller response than that, because not all private assessments are equal, and the answer also depends on what you are hoping the diagnosis will do for you.
Why people are turning to private assessment
The most common reason is simple: time. NHS waiting lists for adult ADHD assessment can stretch to several years in many areas. Children’s autism assessments often face similar delays. For families and individuals who are struggling now, waiting that long is not a neutral option.
There are other reasons too. Some people want a more thorough assessment than they feel they would get on the NHS. Some have already been let down by previous services. Some simply want the diagnosis confirmed quickly so they can make decisions about work, study or family life.
None of these reasons reflect badly on the NHS, which delivers excellent care under enormous pressure. But for many people, private assessment is the only realistic route to getting answers in a useful timeframe.
How private and NHS assessments compare
A credible private assessment uses exactly the same diagnostic frameworks as the NHS. ADHD assessments are based on the criteria in the DSM-5 and ICD-11. Autism assessments draw on the same internationally recognised tools, including the ADOS-2 and ADI-R.
A good private clinic will involve qualified clinicians, usually consultant psychiatrists or psychologists with specific training and experience in neurodevelopmental assessment.
The process will typically include a detailed developmental history, clinical interview, observations, standardised assessment tools, and where appropriate, input from family members or others who know you well.
The fundamental standard is the same as the NHS. What often differs is the time the clinician can give you, the speed of getting an appointment, and the depth of the post-diagnostic conversation.
Does the NHS recognise a private diagnosis?
This is where the answer becomes a little more nuanced. In principle, yes. A diagnosis made by an appropriately qualified clinician, following established clinical guidelines and diagnostic criteria, is considered valid regardless of whether it is completed within the NHS or privately.
However, it is important that the assessment process itself is fully compliant with relevant clinical standards, including National Institute for Health and Care Excellence (NICE) guidelines. This means the assessment should be comprehensive, evidence-based, and carried out by appropriately trained professionals using recognised diagnostic tools and processes.
Individual NHS services may review a private assessment to ensure it meets their local clinical standards and governance requirements before determining how it can be used within NHS pathways (for example, to access specific treatments or support).
You can check the current NICE guidelines here:
https://www.nice.org.uk/guidance/cg128
https://www.nice.org.uk/guidance/ng87
This can help you understand what a high-quality, compliant assessment should include.
For ADHD, where medication may be part of the picture, the question often turns on whether the local NHS service is willing to take over prescribing. This is where Shared Care Agreements come in.
Shared Care Agreements for ADHD medication
A Shared Care Agreement is an arrangement between a specialist service, often a private clinic, and a GP, where the specialist makes the diagnosis and treatment recommendations, and the GP continues to prescribe the medication on the NHS once the patient is stable.
Shared Care Agreements have become more contested in some parts of the UK in recent years, with some Integrated Care Boards and individual GP practices declining to enter into them with private providers. This is not a comment on the quality of private diagnosis, it is usually a resource and policy issue at local level.
If you are considering private assessment because you want NHS prescribing afterwards, it is worth asking your GP in advance whether the local practice will accept a Shared Care Agreement with private clinics. The answer varies considerably across the UK.
Right to Choose, and where it does not apply
In England, the NHS Right to Choose policy allows patients to choose any mental health service that has an NHS contract, including some private providers who deliver NHS-funded assessments. For some patients this offers a route to a faster, NHS-paid assessment.
Right to Choose does not apply in Scotland, Wales or Northern Ireland. Patients in those nations who want to be seen quickly typically need to access private assessment directly, paying themselves or through health insurance.
This is worth being clear about because there is sometimes confusion online, with patients in Scotland or Wales reading advice that does not apply to their part of the UK.
What to look for in a credible private clinic
Not all private services are equal, and the field has grown quickly enough that some have appeared without the rigour the work demands. A small number of high-profile cases involving online providers have raised legitimate questions about diagnostic standards. The vast majority of private clinics work to a high standard, but it is worth knowing what to ask.
A credible private clinic should be able to tell you:
- Who carries out the assessment, with their qualifications and registration with the relevant UK professional body, such as the General Medical Council for psychiatrists or the Health and Care Professions Council for psychologists
- What diagnostic criteria and standardised tools are used
- How long the assessment takes, and whether it is based on a single session or a more detailed process
- What the report contains, who it can be shared with, and what support is offered after the diagnosis is made
If a clinic cannot answer these questions clearly, that is a signal to look elsewhere.
Common questions
Will my GP accept the diagnosis?
Usually yes, particularly for autism. For ADHD with medication, the answer depends on local Shared Care policy. Ask in advance.
Will my employer or university accept it?
A formal diagnosis from a qualified clinician is normally accepted by employers, universities and disability services. Your assessment report is the document that supports access to reasonable adjustments under the Equality Act 2010.
Is private assessment more reliable than the NHS?
No. Both should use the same diagnostic criteria. What private assessment can offer is more time per patient and a faster route to diagnosis, not a more accurate one.
Can a private diagnosis be questioned later?
Like any clinical diagnosis, a private diagnosis can be reviewed if new information emerges, but a properly conducted assessment by a qualified clinician should not be dismissed simply because it was carried out privately.
What this means for you
If you are weighing up whether a private diagnosis is worth pursuing, the practical questions are these: How quickly do you need answers? What do you want the diagnosis to give you? And how confident are you that the clinic you are considering meets the standards above?
At Neuropathways, our assessments are carried out by experienced consultant clinicians, using internationally recognised diagnostic tools and standards. Our reports are written to be useful: not just a diagnosis, but a clear picture of what is happening and how to take the next step. If you would like to talk to us before committing, our discovery call is the first conversation, and there is no obligation beyond it.
