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Choosing between a private and an NHS ADHD assessment is one of the most common questions people in the UK ask once they start looking into diagnosis. Both routes can lead to a valid diagnosis, but they differ a great deal in waiting time, cost and convenience. This guide compares private versus NHS ADHD assessment clearly so you can decide which is right for your situation.
The three routes to an ADHD assessment
There are really three options in the UK. The standard NHS pathway is free but currently has very long waiting lists. NHS Right to Choose, available in England, lets you pick an approved provider with the NHS covering the cost, which can be quicker than the standard route. A private self-pay assessment is usually the fastest, with appointments often available within days or weeks, in return for paying directly.
Waiting times compared
This is the biggest practical difference. Standard NHS adult waits are commonly two to five years, and longer in some regions. Right to Choose can be shorter but, as demand has surged, waits with popular providers may still run to several months. Private self-pay assessment is typically arranged within a few weeks, and sometimes within days. If your symptoms are significantly affecting your life now, the difference between waiting years and waiting days can be substantial. You can read more in our guide to the NHS ADHD waiting list and waiting times.
Cost compared
The NHS route, including Right to Choose, is free at the point of use. Private assessment costs vary widely, commonly from several hundred pounds to well over a thousand, depending on the clinician, the length of the appointment and what is included. At ADHD Diagnosis UK an adult assessment starts from £189, which sits at the lower end of the market while still being delivered by GMC-registered doctors. For a full breakdown, see our private ADHD assessment cost guide and our pricing page.
Is a private ADHD diagnosis valid?
A private ADHD diagnosis made by a suitably qualified clinician using recognised standards is a genuine clinical diagnosis. It can be used when speaking with your GP, employer, university or college. However, each organisation may have its own requirements, and a GP is not automatically obliged to take over prescribing. Many GPs will consider a shared-care agreement after a private diagnosis, but this is at their discretion, so it is wise to ask about their policy in advance.
Pros and cons at a glance
- NHS standard: free, but very long waits and a referral process that can itself take time.
- Right to Choose (England): NHS-funded and often faster than standard, but waits have grown and it does not apply in Wales, Scotland or Northern Ireland.
- Private self-pay: fastest and most flexible, with transparent pricing, but you pay directly and medication costs are separate.
Which route suits you?
If cost is the main concern and you can manage a long wait, the NHS route may suit you. If you live in England and want an NHS-funded assessment that may be quicker than the standard list, Right to Choose is worth exploring with your GP. If your priority is being seen quickly, with clear pricing and the convenience of an online appointment, a private assessment is usually the best fit. Many people also start privately to get answers and a plan sooner, then discuss ongoing care with their GP.
How ADHD Diagnosis UK fits in
Our service is designed for people who want a fast, straightforward private route. Assessments are carried out online by video with GMC-registered doctors, follow NICE clinical standards, and start from £189 for adults. There is no need for a GP referral, and you receive your written report the next day. You can book your assessment online or read our frequently asked questions first.
Frequently asked questions
Is private faster than the NHS?
Almost always. Private appointments are usually available within weeks, compared with NHS waits that often run to years.
Will my GP accept a private diagnosis?
A private diagnosis from a qualified clinician is valid, and many GPs will consider shared care, but they are not obliged to and policies vary. Ask your GP before assuming.
Is an online assessment as good as in person?
When delivered properly by qualified clinicians using structured methods, an online video assessment follows the same recognised diagnostic standards as a face-to-face appointment. See what happens in an online ADHD assessment.
Want answers sooner? Book an online adult ADHD assessment from £189 with a next-day written report and no GP referral needed.
This guide is for general information only and is not a substitute for individual medical advice. It reflects recognised UK guidance, including NICE guideline NG87. If you are concerned about ADHD, speak to a qualified clinician. Last updated 2026.