Commissioning neurodiversity assessment services for ADHD and autism is increasingly complex. Rising referral volumes, the expansion of Right to Choose pathways, and sustained pressure on NHS waiting lists mean local authorities must source providers who can deliver timely, high-quality assessments without compromising clinical rigour. This article provides a practical framework for evaluating neurodiversity assessment providers for local authorities, with a focus on compliance, quality indicators, and procurement pitfalls.
What to Look for in a Neurodiversity Assessment Provider
When assessing a provider, start with regulatory and clinical standards. The minimum requirement is full alignment with NICE clinical guidelines: NG87 for autism spectrum disorder in adults and children, and NG87 for ADHD (covering assessment, diagnosis, and management). A provider that does not reference these guidelines in its service specification is unlikely to meet commissioning standards.
Professional Registration and Accreditation
All assessing clinicians must hold current registration with the appropriate body:
- Clinical psychologists: registered with the Health and Care Professions Council (HCPC)
- Psychiatrists: registered with the General Medical Council (GMC) and on the specialist register
- Specialist nurses: registered with the Nursing and Midwifery Council (NMC), with evidence of neurodiversity-related training
- Occupational therapists and speech and language therapists: HCPC registered with relevant CPD in autism or ADHD
Ask for copies of registration certificates and a register of all assessors who will work on your contract.
Use of Validated Diagnostic Tools
A credible provider uses validated, standardised instruments as part of the diagnostic process. For autism, the Autism Diagnostic Observation Schedule (ADOS-2) and the Autism Diagnostic Interview Revised (ADI-R) are the gold standards. For ADHD, the Diagnostic Interview for ADHD in Adults (DIVA-5) and quantitative tests such as the QBTest are commonly used. A provider that relies solely on unstructured clinical interviews or brief screening tools should be viewed with caution.
Experience with Right to Choose and NHS Frameworks
Many local authorities commission neurodiversity services through NHS frameworks or Right to Choose arrangements. Look for providers who have successfully delivered assessments under these contracts. They should demonstrate familiarity with the competitive procurement processes, waiting list management targets, and reporting requirements that come with NHS commissioning. A provider that cannot cite concrete examples of previous public sector partnerships is unlikely to scale effectively.
Key Quality Indicators for Autism and ADHD Diagnostic Services
Beyond basic compliance, quality indicators help you differentiate between providers that meet standards and those that excel.
Timeliness: Average Wait from Referral to Assessment Start
A key metric is the average number of days from referral triage to the first clinical appointment. Many local authorities target a maximum wait of 12 weeks for autism assessments and 18 weeks for ADHD assessments, though the actual waits in many areas are far longer. Ask for the provider’s current median wait time and their capacity to handle your anticipated referral volume. A provider that cannot give a specific number, or whose wait time exceeds the national benchmark, may be a source of future difficulty.
Multidisciplinary Team Involvement and Report Quality
Single-clinician assessments are increasingly recognised as less reliable, particularly for complex presentations. A quality provider involves a multi-disciplinary team (MDT) that includes at least two professionals from different disciplines (for example, a psychiatrist and an occupational therapist). Ask to see a sample assessment report. It should be comprehensive, include differential diagnoses, reference diagnostic criteria, and provide clear recommendations for post-diagnostic support and education or workplace adjustments.
Post-Diagnostic Support Pathways and Titration Services
Assessment without follow-up is incomplete. For ADHD, medication titration must be arranged promptly, often through shared care protocols with GPs. For autism, the provider should signpost to local support groups, therapies, and social care. Commissioning contracts that separate assessment from aftercare risk leaving patients in limbo. Confirm the provider can offer or coordinate titration services and that they have a clear pathway for transitioning patients back to primary or secondary care.
Patient Feedback and Outcome Measures
Patient experience matters. Ask for recent results from patient-reported outcome measures (PROMs) or satisfaction surveys. Look for consistent feedback on communication, waiting times, and the felt quality of the diagnostic process. A provider that does not collect standardised feedback, or that refuses to share it, should be treated as a higher risk.
Commissioning Checklist: Questions to Ask Prospective Providers
When preparing your procurement documents or evaluation panel, use this checklist to structure your questions.
Assessor-to-Patient Ratio and Caseload Management
Ask: What is your typical assessor caseload, and how do you monitor clinical burnout or quality degradation under high volume? A ratio of one whole-time equivalent assessor managing over 80 active assessments simultaneously should raise a flag. Caseload management processes, including regular supervision and capped appointment numbers, are essential.
Complexity and Co-Occurring Conditions
Ask: How does your team manage patients with co-occurring conditions such as learning disabilities, epilepsy, or mental health disorders? A provider should have procedures for requesting additional MDT input, referring to allied specialists, and adjusting assessment pace for patients with communication or cognitive difficulties.
DNA (Did Not Attend) Rates and Mitigation Strategies
Ask: What is your current DNA rate, and what strategies do you use to reduce it? Acceptable rates are typically below 10 per cent. Strategies include automated reminders, flexible appointment scheduling (including evening or weekend slots), and named coordinators who maintain contact with waiting patients.
Data Security and GDPR Compliance
Ask: How do you store and share patient data, and what is your Record of Processing Activities (ROPA)? All providers must be registered with the Information Commissioner’s Office (ICO). Ensure they use encrypted platforms for remote assessments, secure NHS email, and have a clear retention policy aligned with your local authority’s data sharing agreement.
Evidence of Successful Partnerships
Ask: Can you provide three examples of local authority or NHS trust contracts you have delivered in the past two years, including measurable outcomes such as reduced waiting times or patient satisfaction scores? The best providers can supply genuine anonymised case studies.
Common Pitfalls in Neurodiversity Commissioning and How to Avoid Them
Experience across the sector reveals several recurring mistakes that commissioners should anticipate.
Over-Reliance on Remote-Only Assessment Models
Remote assessments expanded rapidly during the pandemic and remain common. However, NICE guidance stresses that face-to-face observation is often necessary, especially for autism assessments in children or adults with complex needs. A provider with no face-to-face option at all may miss critical clinical information. Ensure your contract specifies that the provider can offer a blended model, with in-person appointments available on request.
Lack of Clear Safeguarding Escalation Pathways
Where a child or vulnerable adult is involved, providers must have a safeguarding policy and a named lead. The contract should state that any safeguarding concern identified during an assessment will be reported to the local authority’s children’s or adults’ safeguarding team within 24 hours. Providers that cannot articulate this process should be rejected.
Insufficient Capacity for Post-Diagnostic Medication Management
For ADHD, diagnosis is only the start. Many local authority contracts implicitly assume the provider can manage titration and follow-up, but capacity is often insufficient. Build explicit service level agreements around titration slots, frequency of follow-up, and handover to GPs. Without this, patients wait months after diagnosis for medication, undermining the entire purpose of early assessment.
Hidden Costs: Report Fees, Cancellation Charges, Administrative Overheads
Request a full schedule of fees before shortlisting. Some providers charge separately for report writing, for additional letters to schools or employers, or for DNA cancellations. Ensure your contract caps these extras and defines what is included in the per-assessment price.
How Vantis Workforce Solutions Supports Local Authorities in Neurodiversity Recruitment
Assembling the right clinical team is often the hardest part of commissioning a neurodiversity service. Vantis Workforce Solutions specialises in providing qualified, vetted professionals across ADHD and autism assessment pathways. We understand the regulatory landscape, from NICE guidelines to Right to Choose frameworks, and we have direct experience supplying assessors to NHS trusts and local authorities.
Our neurodiversity recruitment services cover all key roles: ADHD and autism assessors, clinical psychologists, psychiatrists, specialist nurses, and occupational therapists. Every candidate we present is thoroughly vetted, with verification of ADOS-2 training, HCPC or GMC registration, and proven experience working within NICE pathways.
Whether you need temporary cover to clear a backlog or permanent staff to build a new service, we offer flexible solutions. We do not send CV spam. We match carefully. Our track record includes helping partners reduce waiting times by placing experienced assessors quickly.
If you are evaluating neurodiversity assessment providers for local authorities, start by ensuring you have the right people in place. Contact us today to discuss your staffing needs. Speak to our neurodiversity recruitment team for a confidential conversation about how we can support your service.
Frequently asked questions
What qualifications should a neurodiversity assessor have?
A neurodiversity assessor must hold relevant professional registration: HCPC for clinical psychologists, GMC for psychiatrists, NMC for specialist nurses, or other appropriate body. They should have specific postgraduate training in autism and ADHD assessment, including competency in tools such as ADOS-2, ADI-R, or DIVA-5. Many providers also require membership of professional networks like the UK Adult ADHD Network (UKAAN).
How long does a typical autism assessment take under a local authority contract?
The assessment process itself can take between 2 and 6 hours of direct clinical time, often split across two or more appointments. From referral to report delivery, a well-run service should complete the process within 12 to 18 weeks. Delays usually arise from waiting for collateral information or multi-disciplinary team discussions. Ask your provider for their current average time to completion.
What is the difference between ADOS-2 and ADI-R?
ADOS-2 is a semi-structured, standardised observation tool used during a direct interaction with the patient to assess communication, social interaction, and play. ADI-R is a structured interview conducted with a parent or caregiver to gather detailed developmental history. Both are considered gold-standard components of a comprehensive autism assessment, and using them together improves diagnostic accuracy, especially for complex cases.
How do I check if a provider follows NICE guidelines for ADHD?
Request their clinical protocol and ask specifically about alignment with NICE guideline NG87. Check that they use structured diagnostic interviews such as DIVA-5, that they assess for co-morbid conditions, and that they have a clear titration and shared care protocol for medication. You can also ask for a sample of anonymised reports to see whether NICE criteria are referenced in diagnostic justifications.
What should be included in a neurodiversity service specification?
A good service specification covers the following minimum components: the target population and referral criteria; the assessment pathway (including triage, screening, and diagnosis); details of validated tools to be used; the multi-disciplinary team composition; waiting time targets and reporting frequency; post-diagnostic support and titration plans; safeguarding and data protection policies; and a schedule of fees with clear terms. You may also wish to include quality improvement measures such as patient feedback collection and annual audit of diagnostic consistency.