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Getting a Diagnosis: NHS Pathways and Waits

· 5 min read · Last reviewed 22 April 2026
diagnosisautismADHDRight to ChooseNHS
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You've noticed something. Maybe it was the nursery teacher who mentioned your child doesn't play like the other children. Maybe it was the meltdowns that seem too intense, too frequent, too different. Maybe you've spent months reading articles at midnight, recognising your child in every paragraph.

And now you want to know. You want a name for what you're seeing, because a diagnosis feels like it would open doors. School support. Benefits. Understanding.

Here's how the diagnostic process actually works, what it can and can't do, and why you don't have to wait for it before getting help.

The NHS diagnostic pathway

For most children, the route to diagnosis starts with a referral from a GP or school to a specialist team. The exact pathway varies by area, but it typically involves:

  1. GP or school referral to the local neurodevelopmental or Child Development Centre (CDC) team
  2. Initial screening - sometimes a questionnaire or brief assessment
  3. Multi-disciplinary assessment - a team of professionals (paediatrician, speech therapist, psychologist) observes and assesses your child
  4. Diagnostic decision - the team reaches a conclusion and shares it with you
  5. Post-diagnostic support - recommendations for support, sometimes including therapy referrals

The process is designed to be thorough. But "thorough" has become code for "slow."

The wait

There's no way to soften this. NHS waiting times for neurodevelopmental assessment in many areas are measured in years, not months.

Some areas have waits of 2-3 years for an autism assessment. ADHD pathways can be similarly long. And these waits have grown significantly since the pandemic.

Info

Your child doesn't need a diagnosis to access SEN Support at school, to apply for DLA, or to request an EHCP assessment. All three are needs-based, not diagnosis-based. Don't let the wait stop you from getting help now.

The wait is frustrating. It's okay to feel angry about it. But understanding that the diagnostic process is separate from the support process is important. They're two different things, and you can pursue both at the same time.

Right to Choose

If your child is referred for an ADHD assessment, you have a legal right under the NHS Constitution to choose which provider carries out the assessment. This is called Right to Choose.

In practice, this means you can ask your GP to refer your child to a private provider that has an NHS contract, rather than waiting for the local NHS service. Some of these providers have much shorter waiting times.

How it works:

  1. Ask your GP for a referral for ADHD assessment
  2. Request that the referral goes to a Right to Choose provider (such as Psychiatry-UK or Clinical Partners)
  3. The NHS pays for the assessment - you don't pay anything
  4. The wait is often significantly shorter than the local NHS pathway
Right to Choose currently applies most clearly to ADHD assessments. For autism, the pathway is more complex and the availability of Right to Choose providers varies by area. Ask your GP what's available locally.

This option exists to help families avoid long waits. Your GP should be aware of it, and persistence pays off if they initially push back.

Warning

Not all GPs are aware of Right to Choose, and some initially refuse. If your GP says they can't do it, you can point them to NHS England's guidance. Your local SENDIASS or Patient Advice and Liaison Service (PALS) can help if you hit resistance.

Private diagnosis

Some families choose to pay for a private assessment to avoid the wait. This is an option, but it comes with things to consider.

Advantages:

  • Much shorter waiting times (often weeks rather than years)
  • You choose the professional
  • Detailed report produced quickly

Things to consider:

  • Cost varies widely (typically £500-£2,000+)
  • Some NHS services and LAs may not accept a private diagnosis without their own confirmation
  • Post-diagnostic support still comes through the NHS
  • Quality varies between providers

If you go private, make sure the professional is appropriately qualified and registered with the relevant regulatory body (GMC for doctors, HCPC for psychologists).

What a diagnosis does (and doesn't) do

A diagnosis can:

  • Help you and professionals understand your child's needs
  • Provide a shared language for discussing support
  • Make it easier to explain your child's needs to school
  • Give access to some diagnosis-specific support (e.g., autism-specific social groups)
  • Provide emotional validation for you and your child

A diagnosis doesn't:

  • Automatically trigger any support, funding, or provision
  • Guarantee an EHCP, DLA, or any other benefit (all are needs-based)
  • Change who your child is
  • Give the school permission to treat your child differently (they should already be supporting their needs)
Needs-based
DLA, EHCP, and SEN Support don't require a diagnosis
Diagnosis helps
But it's context, not a ticket

Getting support while you wait

The most important thing you can do while waiting for a diagnosis is to pursue support based on your child's needs right now:

  • Talk to the school. Ask for SEN Support to be put in place based on what they're observing in the classroom. No diagnosis is needed.
  • Apply for DLA. If your child needs significantly more help than a child of the same age, you can apply regardless of diagnosis. The DLA form asks about needs, not labels.
  • Request an EHCP assessment. If the school's support isn't enough, you can request an assessment. The legal test is about needs, not diagnoses.
  • Ask your GP for interim support. Occupational therapy, speech therapy, and other referrals can happen while you wait for the diagnostic assessment.

Getting help

Your local SENDIASS can advise on the diagnostic pathway in your area and help you access support while waiting.

Contact supports families of disabled children with information about diagnosis pathways and what to do while waiting.

National Autistic Society has detailed guidance on the autism diagnostic pathway, including what to expect and how to prepare.

How our free tool can help

The AI assistant at SEND Parents Help can help you understand what support you can access right now, regardless of diagnosis. It covers DLA, EHCP, SEN Support, and many other areas, all based on needs rather than labels.

Don't wait to get help

A diagnosis matters. But it's not the starting point for support. If your child needs help now, pursue it now. The waiting list for an assessment shouldn't become a waiting list for everything else.

Sources and further reading

Legislation and official guidance