Can I get an ADHD diagnosis as an adult?

Yes. ADHD persists into adulthood in approximately 60-70% of people who had it as children. Many adults are diagnosed for the first time in their 30s, 40s, or later. NICE guideline NG87 explicitly covers adult ADHD diagnosis and there is no upper age limit.

How long does an ADHD assessment take?

A comprehensive ADHD assessment typically takes 1-2 hours and may be split across two sessions. It includes developmental history, current symptom evaluation, screening for other conditions, and review of collateral information.

Will an ADHD diagnosis go on my medical record?

Yes, if diagnosed through the NHS or if a private diagnosis is shared with your GP for shared care prescribing. Your medical record is confidential and protected under GDPR. Employers and insurers cannot access it without your explicit consent.

What if my GP refuses to refer me for ADHD assessment?

Ask them to document the refusal in your medical record. You can show them NHS England guidance on Right to Choose, contact your local ICB PALS service, or see a different GP. Right to Choose is a legal right in England, not a discretionary favour.

Can I be diagnosed with ADHD if I did well in school?

Yes. Many people with ADHD compensate through high intelligence, hyperfocus on interesting subjects, or family support. This masking often breaks down later in life when demands increase and external structure decreases.

Is ADHD medication addictive?

When prescribed at therapeutic doses and taken as directed, the risk of addiction is very low. Research shows that treating ADHD with medication actually reduces the risk of substance misuse compared to untreated ADHD.

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How to Get an ADHD Diagnosis in the UK: Complete Guide (2026)

Peter Kolomiets

|April 11, 2026|12 min read

How to Get an ADHD Diagnosis in the UK: Complete Guide (2026)

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References

National Institute for Health and Care Excellence (2018). Attention deficit hyperactivity disorder: diagnosis and management (NICE guideline NG87)
NHS Digital (2024). Adult ADHD: Diagnosis and Treatment — NHS Digital Data
HM Government (2010). Equality Act 2010: Guidance on matters to be taken into account in determining questions relating to the definition of disability
Department of Health and Social Care (2023). The NHS Constitution for England
Fayyad, J. et al. (2007). A meta-analysis of the worldwide prevalence of ADHD in adults

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