This is a directory for ongoing support, not a crisis resource. If you need help right now, see the crisis resources built into the self-assessment tool instead.
A note before you dive in: this list is informational, not a set of endorsements, and it isn’t exhaustive. Costs, wait times, and referral rules change often — treat this as a starting point for your own research, not a final answer.
🇨🇦 Canada
Finding an assessment: Pathways vary by province. Your family doctor is usually the first stop for a referral; wait times for publicly funded assessment can be long in most provinces, which has led many adults to pursue private assessment where cost allows.
- CADDRA — the Canadian ADHD Resource Alliance sets the national clinical guidelines for ADHD assessment and treatment. Not a place to book an assessment yourself, but useful if you want to understand what a “gold standard” Canadian assessment should look like.
- CADDAC — Canadian ADHD Awareness, Education and Advocacy, a national charity with a public-facing “Find a Resource” directory of clinicians and services, plus adult ADHD support groups.
- Autism Alliance of Canada — a national coalition working on Canada’s Autism Strategy, with adult-focused research and resources.
- Autistics for Autistics (A4A) — Canada’s national autistic self-advocacy organization, autistic-led, and an international affiliate of the Autistic Self Advocacy Network (ASAN). Good for community and rights-based advocacy rather than clinical referrals.
🇺🇸 United States
Finding an assessment: Usually starts with a primary care physician or a referral to a psychiatrist, psychologist, or neuropsychologist. Insurance coverage varies significantly by plan and state; community mental health centers and university training clinics can be lower-cost options where available.
- CHADD — Children and Adults with ADHD, home to the National Resource Center on ADHD funded by the CDC. National and local support groups for adults.
- ADDA — the Attention Deficit Disorder Association, focused exclusively on adults with ADHD, with peer support groups and a free WHO-developed adult ADHD self-screener.
- Autism Society of America — national advocacy, information, and referral network with local affiliate chapters.
- Autistic Self Advocacy Network (ASAN) — a national autistic-led disability rights organization; a strong resource for community and rights-based advocacy specifically from autistic people rather than about them.
🇬🇧 United Kingdom
Finding an assessment: Through the NHS, your GP can refer you for an ADHD or autism assessment. NHS waits are frequently long, which is why the Right to Choose scheme exists — it lets your GP refer you to an approved NHS-funded provider (NHS or private) of your choosing, often with a shorter wait than your local service alone. Ask your GP directly about Right to Choose if you’re referred.
- ADHD Foundation — describes itself as the UK’s leading neurodiversity charity, covering ADHD, autism, dyslexia, DCD, dyscalculia, OCD, and Tourette’s.
- ADHD UK — a charity offering free advice specifically on ADHD and the Right to Choose referral process.
- National Autistic Society — the UK’s longest-running autism charity, with support for autistic adults awaiting or after diagnosis, and a helpline.
🇦🇺 Australia
Finding an assessment: ADHD assessments in Australia are most often done by psychiatrists, with growing (but not universal) involvement from GPs and paediatricians depending on state rules; autism assessments are typically done by psychologists or multidisciplinary teams. Medicare rebates can offset some cost via a GP Mental Health Treatment Plan, though out-of-pocket costs remain a real barrier for many.
- AuDHD Australia — describes itself as the national peak body for AuDHD, with a practical, unsugar-coated guide to the adult diagnosis pathway, costs, and wait times.
- Amaze — Victoria’s (and one of Australia’s largest) autism organizations, with adulthood-specific resources including a self-paced “Autistics’ Guide to Adulthood.”
- Australian ADHD Professionals Association (AADPA) — clinician-facing, but useful if you want to understand the current clinical guidelines shaping how you’ll be assessed.
🇳🇿 New Zealand
Finding an assessment: As of early 2026, GPs and nurse practitioners — alongside psychiatrists, paediatricians, neurologists, and psychologists — can complete or oversee adult ADHD diagnosis, which has widened access beyond psychiatrist-only referral. A Special Authority (needed for subsidized stimulant medication through Pharmac) can only be issued by a psychiatrist, paediatrician, neurologist, GP, or nurse practitioner — not by a psychologist alone, which matters if medication is part of what you’re hoping for.
- ADHD New Zealand — Aotearoa’s largest and longest-running ADHD non-profit, established in 1979, offering information, community, and regional directories (they don’t recommend specific practitioners, but can point you toward local options).
- Autism New Zealand — nationwide outreach service and support network for autistic people and their whānau, with 16 branches across the country.
A realistic note on cost and wait times
In every country above, adult assessment can be slow, expensive, or both — that’s a real and common barrier, not a sign you’re not “sick enough” to deserve support. Self-identification is a valid and meaningful step on its own if a formal assessment isn’t currently accessible to you, even though it can’t replace one for things that require a diagnosis on record, like medication or certain workplace accommodations. Our upcoming assessment-logistics page will go deeper on cost, wait times, and what to actually expect in the room — for now, the organizations above are the most reliable place to check current, local specifics.
This list is educational and is not an endorsement of any organization or provider, and it isn’t medical, legal, or counselling advice. Details change — always verify current information directly with the organization before relying on it. If you’re in crisis, please use the crisis resources in the self-assessment tool rather than anything on this page.