Deciding between an NHS and private ADHD assessment is never as simple as it sounds.
Yes, both routes can lead to a diagnosis — but the experience, waiting times, and costs can be very different.
Here’s what you need to know before making a decision.
Waiting Times
Waiting times are often the biggest reason people choose private assessment.
NHS waiting lists for adult ADHD assessments can range from several months to over two years. In some parts of the UK, people are waiting three years or more.
With private assessments, appointments are often available within days, and the full process may be completed within a few weeks.
That speed can be life-changing if ADHD is significantly affecting your daily life. However, if you’re able to wait, NHS assessment does not cost anything upfront.
Cost Considerations
NHS ADHD assessments and treatment are free at the point of use. Once diagnosed, specialist care and medication are provided through the NHS.
Private assessment is a very different financial commitment.
Initial private assessments typically cost between £500 and £1,600+, with additional fees for follow-up appointments and medication.
Assessment Quality and Depth
NHS clinics are staffed by experienced psychiatrists and multidisciplinary specialist teams.
Private providers vary significantly. Some offer excellent, thorough assessments, while others may cut corners.
If you’re choosing a private provider, it’s essential to ensure they are registered with the Care Quality Commission (CQC) and follow recognised clinical guidelines.
Ongoing Support and Medication
With the NHS, ongoing care is built into the pathway. This includes medication reviews, dose adjustments, and access to specialist services.
Medication management is fully integrated into NHS care.
Private patients can continue paying privately for follow-up care, or attempt to transfer back to the NHS through shared care.
Shared care allows your GP to take over prescribing based on recommendations from your private psychiatrist, though not all GP practices accept these arrangements.
Making Your Decision
Many people choose a mixed approach — starting privately to access a diagnosis quickly, then transferring back to the NHS for long-term care.
This approach offers the speed of private assessment alongside the sustainability of NHS support once treatment is established.
The right choice depends on your circumstances, finances, and how urgently you need support.