NHS Autism Waiting Lists — Your Options While You Wait

Current NHS Waiting Times

NICE guideline NG170 states that the first diagnostic appointment should take place within 13 weeks of referral. In practice, most NHS trusts cannot come close to that target.

As of December 2025, 254,108 people were on autism assessment waiting lists in England — more than the population of Southampton. Around 90% had been waiting longer than 13 weeks. The average wait is now over 17 months, roughly 200 days longer than the year before (National Autistic Society, 2025).

The picture varies enormously by region. A Nuffield Trust analysis of 2023 MHSDS data found some ICBs with median waits around 2 months, while one reported a median of over 2.5 years. BBC analysis found the national median at around 300 days, but one ICB exceeded 1,100 days (over 3 years). Your GP can tell you the current estimated wait for your local service — the answer will shape what you do next.

If your wait exceeds 18 weeks, consider a Right to Choose referral to an NHS-funded private provider. For a full guide to the assessment pathways available to you, see our adult autism diagnosis in the UK page.

What You Can Do While Waiting

A waiting list is not a dead end. There is a great deal you can do right now to better understand yourself and get practical support — none of which requires a formal diagnosis.

• Educate yourself. Read about autism from autistic authors and clinicians. Explore the autism neurotype page on AskSheldon for a balanced overview of traits, trade-offs, and lived experience.
• Build your evidence portfolio. Start keeping notes on situations where autistic traits show up in your daily life — sensory sensitivities, social communication differences, routines, shutdowns. This will be invaluable when your assessment finally arrives.
• Connect with autistic communities. Peer support from people who share your experiences can be genuinely transformative. Organisations such as the National Autistic Society and local peer groups offer spaces to share and learn.
• Request reasonable adjustments. Under the Equality Act 2010, you do not need a diagnosis to request workplace or educational adjustments. If autistic traits substantially affect your daily life, you are likely protected. Adjustments might include noise-cancelling headphones, written rather than verbal instructions, or flexible working patterns.
• Access mental health support. Anxiety, depression, and burnout are common while waiting for answers. Your GP can refer you to talking therapies or prescribe medication for co-occurring conditions without needing to wait for your autism assessment.
• Manage sensory overload. Try our sensory overload toolkit for breathing exercises and grounding techniques you can use right now, without waiting for a diagnosis.

What to Do While You Wait: An Actionable Checklist

The wait for an NHS autism assessment is frustrating, but it doesn't have to be wasted time. These steps can help you build self-understanding, strengthen your assessment, and protect your wellbeing.

Right to Choose: A Faster Route

The NHS Right to Choose is a legal right under the NHS Constitution that allows you to choose which provider carries out your assessment, as long as that provider holds an NHS contract. In practice, this means your GP can refer you to an approved private provider — such as Psychiatry-UK — and the NHS funds the assessment.

Waiting times through Right to Choose providers are typically 6 to 18 months, which is still not ideal but considerably shorter than most NHS trust waiting lists. The process starts with your GP: explain that you would like to exercise your Right to Choose and ask for a referral to a specific provider.

Some GPs are unfamiliar with this pathway or may initially decline. You are within your rights to insist, and organisations like the National Autistic Society provide template letters you can use. If your GP continues to refuse, you can raise a formal complaint through the practice manager or contact your local Patient Advice and Liaison Service (PALS).

For a detailed guide on how to use this pathway, see our Right to Choose guide.

Private Assessment as an Alternative

If the wait is untenable and Right to Choose is not available in your area, a private autism assessment is another option. Costs typically range from £800 to £2,500, depending on the provider and the depth of the assessment. Some offer payment plans.

The advantages are clear: shorter waits (often weeks rather than years), choice of assessor, and a more flexible appointment process. The trade-offs are equally real: the cost is significant, and not all NHS services will accept a private diagnosis without their own confirmatory review. It is worth checking your local trust's policy before committing.

For more detail on the full range of diagnostic pathways, see our adult autism diagnosis guide.

What You Can Do Right Now

A waiting list does not have to be wasted time. Here are steps you can take right now, none of which require a formal diagnosis.

• Explore Right to Choose. Ask your GP to refer you to an NHS-funded private provider. This can cut your wait from years to months.
• Build your evidence portfolio. Keep a diary of situations where autistic traits show up in your daily life. This will be invaluable when your assessment finally arrives.
• Connect with autistic communities. The National Autistic Society and local peer groups offer spaces to share experiences and learn from people who understand.

AskSheldon also offers free tools to make the wait more productive:

• Free screening tools. Our “Am I Autistic?” screening uses AI-assisted multi-disciplinary analysis to help you understand the likelihood of autism before your formal assessment.
• Sheldon, your AI companion. Chat with Sheldon about your experiences, ask questions about autism, or simply talk to someone who understands neurodiversity — available 24/7 at no cost.
• Evidence building. Our assessment tools help you structure and record your experiences in a way that will be useful when your clinical appointment arrives.

Frequently Asked Questions

AskSheldon provides educational and screening support, not formal diagnoses. Always consult a qualified healthcare professional for clinical evaluation. Information on this page was last reviewed in March 2026.