Real prices from the 38 private ADHD clinics we've independently verified in London, what actually drives the cost, and how NHS Right to Choose works if you're covered by a London ICB.
If you've looked into an NHS adult ADHD assessment in London and found a waiting list stretching years rather than months, you're not alone — it's one of the reasons private assessment has grown so quickly across the city. London also happens to have more private ADHD clinics than anywhere else in the UK: we've independently verified 38 of them, checking each one against its own website rather than relying on a compiled directory. Here's what that research actually shows about cost, wait times, and how to choose sensibly.
Across the 38 London clinics we list, verified prices for an adult ADHD assessment range from £400 to £1,800, with most clustering somewhere around £900–£1,000. That figure is for the core diagnostic assessment — the clinical interview, questionnaires, and a written report. It doesn't necessarily include everything: a feedback session, a follow-up appointment, or ongoing medication management are often priced separately, so the number on a clinic's homepage isn't always the full cost of the whole pathway.
Always check exactly what's included before booking. "Assessment" can mean just the diagnostic interview, or a full package with feedback session, written report, and a first follow-up appointment. If a clinic's own site doesn't spell this out clearly, ask before you pay.
We don't quote a single "London wait time" here, because it varies enormously from clinic to clinic and changes often — a figure that's accurate one month can be stale the next. Each clinic's own profile on ADHD Navigator shows its current wait. As a general rule, online-only appointments tend to move faster than in-person ones simply because they aren't limited by a single physical location's diary.
Under NHS Right to Choose, you can ask your GP to refer you to an alternative NHS-commissioned assessment provider instead of joining your local waiting list — at no cost to you. London is covered by several NHS Integrated Care Boards (ICBs), and 2026 has seen some of these reorganised and merged, so which one applies to you depends on your borough and GP practice. Availability isn't guaranteed everywhere: individual ICBs can limit or pause how many Right to Choose referrals they'll fund in a given year, so it's worth confirming current capacity with your GP rather than assuming it's open. For the full mechanism, eligibility checklist, and a copy-paste GP letter template, see our Right to Choose guide.
Not always, but it's worth knowing the difference before you book. A consultant psychiatrist can diagnose ADHD and prescribe medication in the same pathway. A psychologist- or nurse-led service can diagnose ADHD too, but typically can't prescribe — if medication is recommended, you'd be referred on to a GP or psychiatrist afterwards. Neither route is objectively better; it depends whether you expect to want medication straight away or would rather take that decision in a separate step.
All 38 clinics mentioned here — their real prices, delivery options, and what they actually offer — are listed on our London clinics page, independently verified against each clinic's own site rather than copied from a compiled directory. If you'd rather not compare manually, our free 3-minute screener matches you to the clinics most likely to fit your needs, preference, and budget.
This article is for informational purposes only and does not constitute medical advice. ADHD Navigator is not a medical provider and does not offer diagnostic or treatment services.
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