Waiting lists for an NHS adult ADHD assessment in England now stretch past eight years in some Integrated Care Boards, and the BBC's 2023 Right to Choose investigation revealed regional gaps growing wider each quarter. For adults whose work, relationships or mental health cannot wait, a private ADHD assessment has become the pragmatic route to a diagnosis, a prescription, and, where clinically appropriate, a shared-care agreement that returns long-term prescribing to the NHS at NHS prices.

This guide is written for UK adults navigating that decision in 2026. It covers what a private assessment actually involves, what it costs, how long it takes, what NICE and the GMC expect from providers, and how to avoid the common pitfalls that leave people with an unusable report or a stalled shared-care request.

What a private ADHD assessment includes

A defensible adult ADHD assessment follows the NICE guideline NG87 diagnostic framework. That means the clinician, a consultant psychiatrist, a specialist ADHD nurse prescriber, or a suitably qualified clinical psychologist working within a prescribing pathway, must document all of the following:

• A full clinical interview covering current symptoms, developmental history, and functional impairment across at least two settings (typically work and home).
• A structured DSM-5 or ICD-11 symptom review using a validated instrument such as the DIVA-5, ACE+, or ASRS as a starting point.
• Collateral history where possible, a partner, parent, or long-standing friend who can speak to childhood and current behaviour. NICE flags this as important but not mandatory for adults.
• Screening for common differentials and co-occurring conditions: anxiety, depression, bipolar spectrum, autism, trauma, sleep disorders, and substance use.
• A written report clear enough for a GP, an occupational health team, or the DVLA to act on.

If a provider offers a "diagnosis in 30 minutes" or skips the developmental and collateral history entirely, the report is unlikely to be accepted for shared care by an NHS GP, and increasingly unlikely to be accepted by employers or universities requesting reasonable adjustments.

How much a private ADHD assessment costs in the UK

Prices in 2026 sit in a fairly consistent band once you strip out the outliers:

Assessment type	Typical price range	What's included
Full adult ADHD assessment (consultant psychiatrist)	£695, £1,400	90 to 120 minute assessment, written report, initial diagnosis letter
Nurse prescriber-led assessment (with psychiatrist oversight)	£495, £850	Same framework, typically shorter titration window
Titration and follow-up (first 6 months)	£75, £180 per review	Usually 3 to 5 reviews before stability
Ongoing private prescribing (post-titration)	£60, £150 per month	Medication costs are additional
Shared-care transfer to NHS GP	Free (if GP accepts)	NHS prescription charges only after

London-based consultants sit at the top of the range; regional clinics and remote-first providers cluster around the middle. Very low prices (sub-£400 for a full assessment) almost always mean either a shortened protocol, a non-prescribing assessor, or a report that GPs in your area are known to reject.

How long the process takes

Three timelines matter, and providers rarely make all three visible:

1. Time to assessment appointment. Reputable UK private providers currently offer appointments within 2 to 6 weeks. Same-week slots exist but usually mean the clinician has recent no-shows, not a systemic shortage of demand.
2. Time to written report. NICE-aligned providers issue the diagnostic report within 5 to 15 working days of the assessment. Anything longer than a month suggests capacity issues that will also affect your titration.
3. Time to stable medication. Titration, the process of finding the right medication and dose, typically takes 8 to 20 weeks with 3 to 5 reviews. This is the phase where quality of aftercare matters most.

Shared care: the step that decides your long-term cost

A shared-care agreement is the arrangement where your NHS GP takes over prescribing of a controlled medication (methylphenidate, lisdexamfetamine, dexamfetamine, atomoxetine) after the private specialist has stabilised your dose. It is what makes private ADHD care affordable long-term, you pay privately for the diagnosis and titration, then NHS prescription charges (or a Prescription Prepayment Certificate) for the rest.

GPs are not obliged to accept shared care. Whether they do depends on:

• Whether your local ICB has an active shared-care protocol for adult ADHD (most now do, but coverage varies).
• Whether the private provider is CQC registered and the prescriber is on the GMC Specialist Register (or NMC equivalent for nurse prescribers).
• The quality of the diagnostic report, vague reports, or reports missing the collateral history and functional impairment sections, are the single most common reason GPs refuse.
• Your GP's individual clinical judgement, some practices decline all private shared care as policy.

Before you book, it is worth a five-minute call to your GP surgery to ask two questions: does the practice accept private shared care for ADHD in principle, and does the local ICB have a shared-care protocol in place. If both answers are yes, your route is clear. If either is no, the Right to Choose pathway through providers like Psychiatry-UK remains the lowest-cost alternative, though wait times vary.

What to check before you book

A short checklist that will save you months:

• CQC registration. Search the CQC register for the provider. Absence is a red flag.
• Prescriber credentials. The person diagnosing you should be on the GMC Specialist Register under Psychiatry, or an NMC-registered nurse prescriber working under psychiatrist supervision.
• Written shared-care policy. Reputable providers publish a shared-care letter template and will confirm in writing what happens if your GP declines transfer.
• Titration included or itemised. Ask exactly what the assessment fee covers and what titration reviews will cost. Bundled titration packages are usually better value than pay-per-review.
• Report turnaround in writing. Ten working days is reasonable; anything open-ended is not.
• Complaints and refund policy. UK independent healthcare providers should be members of ISCAS or an equivalent independent complaints scheme.

Common pitfalls

The "diagnosis-only" trap. Some providers offer a low-cost assessment with no titration pathway. You end up with a report but no route to medication, and finding a separate prescriber to start titration on someone else's diagnosis is difficult and expensive.

Overseas telehealth providers. A diagnosis from a clinician not registered with the GMC or a UK equivalent will not support NHS shared care, and controlled drug prescriptions from outside the UK cannot be dispensed by UK pharmacies.

The "assessment" that is really a screening questionnaire. If the entire process is an online form and a 20-minute call, you have paid for a screening, not a diagnostic assessment. Screenings are useful triage tools; they are not a NICE-aligned diagnosis.

Assuming your employer or university will accept any report. Occupational health teams and university disability services usually specify what a diagnostic report must contain. A report missing the functional impairment section is often sent back for revision.

What Take a Seat does differently

Every clinician listed on Take a Seat is verified against the GMC or NMC register, holds current indemnity, and works to a NICE-aligned assessment protocol. We publish each provider's shared-care policy, typical report turnaround, and CQC registration on their profile before you book, no hidden titration fees, no diagnosis-only pathways, and no clinicians outside UK regulatory reach.

If you would like a shortlist matched to your location, budget and timeline, start our 90-second pathway and we will surface the three closest-fit specialists with confirmed availability.

Frequently asked questions

Is a private ADHD diagnosis valid on the NHS?

Yes, provided the assessment meets NICE NG87 standards and the prescriber is on the GMC Specialist Register or an NMC equivalent. The NHS is not obliged to accept every private diagnosis for shared care, but a well-documented, NICE-aligned report from a CQC-registered provider is the most likely to be accepted.

How much does private ADHD medication cost?

During private titration, medication costs typically range from £30 to £120 per month depending on the drug and dose, on top of review fees. Once shared care transfers to your NHS GP, you pay standard NHS prescription charges (or a Prescription Prepayment Certificate at around £115 per year for unlimited prescriptions).

Can I get a same-week private ADHD assessment in the UK?

Occasionally, yes, reputable providers sometimes have cancellation slots available within a week. Be cautious of providers where same-day appointments are the norm; that pattern usually means either shortened protocols or very low booking volume.

Will my GP prescribe ADHD medication after a private diagnosis?

This depends on your GP practice's policy, your local ICB's shared-care protocol, and the quality of the diagnostic report. Roughly two-thirds of UK GPs accept shared care from CQC-registered private providers in 2026, but there is significant regional variation. Call your surgery before booking.

What is the difference between an ADHD screening and an ADHD assessment?

A screening is a short questionnaire that indicates whether a full assessment is worthwhile, it cannot diagnose ADHD. A full assessment is a 90 to 120 minute clinical interview by a specialist, uses validated diagnostic instruments, includes developmental and collateral history, and produces a written report that supports treatment and workplace adjustments.

Is Right to Choose faster than a private assessment?

Right to Choose remains free at the point of use but wait times have grown significantly through 2025 and 2026, currently 12 to 36 months at most Right to Choose providers. Private assessment remains the fastest route if speed is the priority.