Autism Assessments

The ADOS-2 (Autism Diagnostic Observation Schedule, Second Edition) is a structured, standardised observational assessment in which trained clinicians observe social communication, interaction, and behaviour through a series of planned activities. It has the most robust evidence base of any autism diagnostic tool, and its findings are widely recognised by employers, the NHS, universities, and other institutions. Used alongside the ADI-R developmental interview, the ADOS-2 forms the definitive diagnostic standard for autism spectrum condition.

The ADOS-2 requires two independently trained and certified assessors to be present throughout the assessment. Both must hold current ADOS-2 certification, which involves specialist training and regular calibration to maintain reliability. The assessment itself typically lasts 60–90 minutes, after which both assessors independently score their observations, then meet to compare and finalise results. This is followed by a detailed clinical review and the preparation of a comprehensive diagnostic report. The fee reflects the significant clinical resource involved in this level of rigour.

The full package (£2,600) includes the ADOS-2 observational component and, if a family member is available, a detailed developmental interview (ADI-R). The ADOS-2 requires two certified assessors and is considered the gold standard. The Developmental Assessment (£1,200) includes a full ADI-R developmental interview and clinical developmental assessment — it does not include the ADOS-2 observational component. Dr. Korb will advise which is most appropriate for your situation.

No. You can self-refer directly without a GP referral. Simply book via the online booking system or contact us with your enquiry. While a GP referral is not required, it is generally a good idea to inform your GP that you are pursuing a private autism assessment, so that they are aware and your medical records remain up to date.

The ADOS-2 assessment itself lasts approximately 60–90 minutes. For the full ADOS-2 package, there may be one or two assessment appointments depending on clinical need, followed by independent scoring and report preparation. The Developmental Assessment is typically completed in one longer appointment. Following the assessment, the written report is prepared and then discussed at a follow-up appointment.

Yes. A comprehensive written diagnostic report is included in the fee for both assessment options. The report contains the full assessment findings, diagnostic conclusions, and clinical recommendations. It is written to a standard suitable for use with employers, educational institutions, the NHS, Universal Credit or PIP applications, and other agencies that may require formal documentation.

Absolutely. Many adults reach mid-life — or later — without having received an autism diagnosis, particularly women, those with co-occurring conditions, or those whose presentations were masked in childhood. Dr. Korb is experienced in assessing adults across the full range of presentations, including those with complex histories or previous diagnoses that may not fully account for their difficulties.

A follow-up appointment is included with the assessment to discuss the findings in depth. This is an opportunity to explore what the diagnosis means for you, discuss any reasonable adjustments you may be entitled to at work or in education, and plan any next steps. Dr. Korb can provide a letter for employers or institutions if required. Many people also benefit from follow-up to address co-occurring conditions — such as anxiety, depression, ADHD, or sleep difficulties — which are common alongside autism spectrum condition.