Going private for autism in Scotland

Why people choose private assessment

NHS waiting times for autism assessment in Scotland are among the longest for any health condition. In some health board areas, children wait over five years. Adult autism assessment services are underdeveloped or absent in parts of Scotland. Many people choose to pay for a private assessment rather than wait, or because NHS services in their area do not offer adult autism assessment at all.

A private assessment does not mean a lower quality assessment, but quality does vary considerably. This page explains what to look for before you book.

Regulation in Scotland

Scotland's independent healthcare regulator is Healthcare Improvement Scotland (HIS), not the CQC (Care Quality Commission), which regulates providers in England only. An HIS-registered provider has been inspected against clinical standards; complaints can be escalated to an independent regulator. Not all private providers operating in Scotland are required to hold this registration; whether registration is required depends on the type of clinician involved. Our regulation page explains the distinction in full.

Our Compare providers tool shows current HIS status for each listed provider.

What a good autism assessment includes

According to SIGN 145, Scotland's clinical guideline for autism, a thorough assessment should include:

• A detailed clinical interview: covering your developmental history, current traits, and their impact across different areas of your life
• Validated diagnostic instruments: the ADOS-2 (Autism Diagnostic Observation Schedule, Second Edition) is the recognised observational gold standard: structured and semi-structured activities and conversation observed by a trained clinician. The ADI-R (Autism Diagnostic Interview, Revised) is an in-depth interview conducted with someone who knew you well in childhood, typically a parent. For adults, the RAADS-R (Ritvo Autism Asperger Diagnostic Scale, Revised) is a validated self-report questionnaire used alongside clinical interview. The CAT-Q (Camouflaging Autistic Traits Questionnaire) may also be used, particularly where masking is a factor. Women and girls are especially likely to be missed by standard tools because they learn to hide or compensate for their autistic traits. Not all assessments will use all of these, but at least one validated instrument should be used
• Collateral history: information from someone who can speak to your childhood development and presentation. This is clinically important because autism must have been present from early in development. It does not have to be a live interview; school reports, GP letters, or a written account from a parent or sibling can serve this purpose
• Consideration of co-occurring conditions: anxiety, depression, ADHD, dyspraxia, and sensory processing differences frequently co-occur with autism and should not be overlooked
• A written diagnostic report: setting out the clinical findings, the tools used, and the reasoning behind the outcome

Diagnostic tools explained

ADOS-2 (Autism Diagnostic Observation Schedule, Second Edition): The recognised observational gold standard for autism assessment. A trained clinician observes and interacts with you through structured and semi-structured activities and conversation. It is not a questionnaire. It requires in-person or video interaction administered by someone with specific ADOS-2 training. Many providers mention the ADOS-2; it is reasonable to ask whether the clinician delivering your assessment is formally ADOS-2 certified. For a plain-English guide to these tools, why some ADOS tasks look unusual, and what to expect, see Assessment tools and what to expect.

ADI-R (Autism Diagnostic Interview, Revised): A structured interview conducted with someone who knew you well in childhood, typically a parent. Covers developmental history in detail. Often used alongside the ADOS-2, particularly for children and young people.

RAADS-R (Ritvo Autism Asperger Diagnostic Scale, Revised): A validated self-report questionnaire used in clinical assessment, distinct from the free online versions you may have completed before booking. Used alongside clinical interview as supporting evidence, not as a standalone diagnostic instrument.

CAT-Q (Camouflaging Autistic Traits Questionnaire): Measures how much someone masks autistic traits in social situations. Particularly relevant for women, girls, and adults who have spent years unconsciously compensating for their autistic traits. Masking can cause significant distress and can obscure traits that would otherwise be visible in a standard clinical interview.

A questionnaire alone, even a validated one, is not sufficient for a diagnosis. A thorough autism assessment requires at least one validated observational or interview instrument administered by a trained clinician, alongside a full clinical interview and collateral history.

Multi-disciplinary assessments

Autism assessment is often more complex than ADHD assessment, and many providers, particularly for children, use a multi-disciplinary team (MDT). An MDT might include a consultant psychiatrist, clinical psychologist, specialist nurse, speech and language therapist, and occupational therapist.

MDT assessments are generally more thorough and are the standard in NHS children's services. For adults, a single experienced clinician may be sufficient, but ask about the provider's approach before booking.

Who can diagnose autism

Autism can only be diagnosed by a clinician with appropriate training in neurodevelopmental assessment. In practice, this typically means:

• A psychiatrist or specialist doctor with specific experience in autism assessment
• A clinical psychologist with specialist training in neurodevelopmental conditions

Checking clinician registration takes two minutes and confirms they are qualified and currently licensed:

• Doctors (consultant psychiatrists, associate specialists, specialist doctors and other medical doctors): GMC Medical Register
• Psychologists: HCPC Register, look for "clinical psychologist," not just "psychologist," as the latter title is not protected

Costs

Private autism assessment in Scotland typically costs more than private ADHD assessment, reflecting the greater time involved. Expect to pay from around £800 upwards for a single-clinician adult assessment, and considerably more for multi-disciplinary assessments or combined ADHD and autism assessments (as of 2026, check current costs with providers directly). Always ask for a written breakdown of what the fee covers: report, follow-up discussion, and any further appointments.

Unlike ADHD, there is no ongoing prescribing or shared care arrangement after an autism diagnosis, so the costs are largely front-loaded.

The diagnostic report

The written report matters beyond the assessment itself. It is what you will use to access reasonable adjustments at work or university, apply for Adult Disability Payment (ADP, called PIP in the rest of the UK), request additional support at school, or explain your diagnosis to healthcare providers.

A good report describes your developmental history, the tools used, how your traits present across different areas of life, and the clinical reasoning behind the diagnosis. It should be written clearly enough that someone unfamiliar with your case, a GP, employer, or DWP assessor, can follow the basis for the diagnosis.

Ask the provider before booking: what does the report include, how long is it typically, and how long after the assessment will you receive it?

Questions to ask before you book

• Is this provider registered with Healthcare Improvement Scotland?
• Who carries out the assessment, and what are their qualifications, registration, and specific experience in autism?
• What validated diagnostic instruments are used? Is the ADOS-2 included?
• How is collateral history gathered? What if I do not have access to a parent?
• Is the assessment single-clinician or multi-disciplinary?
• What does the written report include and how long is it?
• How long after assessment will I receive the report?
• What is included in the price?

Signs of a poor-quality assessment

• No named clinician or unclear who carries out the assessment
• No validated diagnostic tools: a questionnaire alone is not a diagnostic assessment
• No collateral history process
• Very short assessment times (a thorough autism assessment typically involves multiple hours of clinical contact)
• No written diagnostic report included as standard
• Reluctance to share credentials or registration details
• No HIS registration for a service that involves medical practitioners or nurses. Psychology-led services are not required to register, but any service with a doctor or nurse prescriber should be.

After a private autism diagnosis

Unlike ADHD, there is no medication pathway or shared care arrangement following an autism diagnosis. The focus shifts to understanding your diagnosis, accessing support, and making practical adjustments. See our after an autism diagnosis guide for what comes next.