NHS ADHD Waiting Times
How Long Does an NHS ADHD Assessment Take? UK Waiting Times Explained
If you’re trying to work out how long you’ll actually wait for an NHS ADHD assessment, the honest answer is: it depends enormously on where you live, and in many parts of the UK, it’s a lot longer than most people expect. Here’s what the most recent data actually shows, and what your realistic options are.
The headline figure, and why it’s misleading
Across England, the average wait for an initial adult ADHD assessment through the standard NHS pathway is now widely reported at over two years — but that single figure hides huge regional variation. Some trusts report waits closer to 18–24 months; others, including parts of Kent, Sussex and London, have reported waits of five to seven years for a first appointment. Scotland, Wales and Northern Ireland each have their own figures, generally somewhere between one and five years depending on area, and NHS Scotland in particular doesn’t offer the Right to Choose route described below. One NHS board’s own freedom-of-information data (NHS Greater Glasgow and Clyde, for adults, as of March 2026) reported an average wait of 107 weeks and a 90th-percentile wait of 186 weeks — over three and a half years for one in ten people on the list.
Why the “official” wait understates the real one
The clock that trusts report usually starts only once a GP referral reaches the specialist ADHD service — not from when you first raise the issue with your GP, which can itself take weeks or months of appointments, especially if other explanations (anxiety, depression) are explored first. For many people, the real end-to-end time from “I think this might be ADHD” to an actual assessment is meaningfully longer than the quoted waiting-list figure alone suggests.
NHS Right to Choose — a faster NHS route
In England, the NHS Right to Choose scheme lets you ask your GP to refer you to an alternative NHS-funded provider, rather than your local trust’s standard waiting list, as long as that provider holds a live NHS Standard Contract. Right to Choose waits are commonly reported at six to twelve months — still not instant, but typically a fraction of the standard pathway in the areas worst affected. It isn’t available in Scotland, and provider availability can change, so it’s worth checking directly with any provider before assuming a specific wait.
The private route, and what it costs
A private ADHD assessment is typically much faster — often weeks rather than years — but comes at real cost: commonly £600–£2,000+ for the initial assessment alone, plus £150–£400 per titration appointment if medication is prescribed (usually two to four appointments), ongoing private prescription costs, and annual review fees. Total first-year costs for diagnosis plus medication titration commonly run from roughly £1,500 to £3,500 or more. Many people choose a private diagnosis and then transfer ongoing prescribing back to the NHS via a shared-care agreement, though availability of shared care varies by GP practice and area.
Whichever route makes sense for you, you don’t have to wait for an assessment to start getting some support. Our free screening gives you an honest, evidence-informed starting point today, and our ADHD Assessment & Planning session can help you work out which of these routes actually fits your situation.
