The Complete ADHD Diagnosis Guide UK
Getting an ADHD diagnosis as an adult in the UK can feel daunting. This guide covers every route — NHS, private, and Right to Choose — so you can make an informed decision.
NHS vs private ADHD diagnosis
The NHS offers free ADHD assessments but waiting times of 2–5 years are common in most areas of England. Private clinics typically offer appointments within 2–12 weeks, with costs ranging from £350 to £1,500+. The NHS Right to Choose scheme offers a middle ground: a free assessment at a private clinic, funded by the NHS.
What happens during an ADHD assessment?
A comprehensive ADHD assessment typically includes a structured clinical interview (often using the DIVA-5 or similar), validated rating scales completed by you and sometimes a third party, a developmental history review, and a cognitive screener in some cases. The assessment is conducted by a GMC-registered psychiatrist or HCPC-registered clinical psychologist.
The diagnostic report
After your assessment, you should receive a written diagnostic report. This should state clearly whether you meet criteria for ADHD, which presentation (inattentive, hyperactive-impulsive, or combined), and any recommendations for treatment. Insist on a written report — verbal-only feedback is not sufficient.
What happens after a diagnosis?
Following a diagnosis, treatment options include medication (stimulant and non-stimulant), ADHD coaching, CBT, and psychoeducation. If prescribed medication privately, ask whether the clinic offers a shared care arrangement with your GP — this allows your GP to take over prescribing, which is significantly cheaper long-term.
Frequently asked questions
Can I self-refer for an ADHD assessment?
Yes — private ADHD clinics accept self-referrals. You do not need a GP letter to book a private assessment. However, for NHS-funded assessments (including Right to Choose), you will need a GP referral.
Is an ADHD diagnosis from a private clinic valid?
Yes. A diagnosis from a GMC-registered psychiatrist at a private clinic carries the same legal and clinical validity as an NHS diagnosis. It should be accepted by your GP, employer, DVLA, and educational institutions.
How long does an ADHD assessment take?
The clinical interview typically takes 60–90 minutes. Some clinics spread the assessment over two sessions. You should also expect to complete rating scales before or after the appointment.