Research from gatekeeper health systems has repeatedly identified barriers when people must first move through general practice before reaching ADHD assessment or specialist treatment.
Context matters. Most of the evidence summarized here comes from the UK, Ireland, Europe, and Australia. Primary-care roles, referral rules, prescribing arrangements, and access pathways differ across countries.
Earlier Evidence: GP Knowledge and Attitudes
A 2016 systematic narrative review examined research on general practitioners in settings where primary care commonly acts as a gatekeeper to ADHD services.
Only 11 papers representing 10 studies, published between 2000 and 2010, met the review criteria. The studies were mainly from the UK, Europe, and Australia.
Across the studies, researchers found:
- uneven recognition and knowledge of ADHD
- mixed and sometimes unhelpful beliefs about the validity of ADHD
- concerns and uncertainty about medication
- beliefs about parenting that could influence interpretation of ADHD
- limited ADHD-specific training
- reluctance among some GPs to participate in shared-care arrangements
The evidence base was small and methodologically varied, so these findings should not be treated as a description of every GP.
Newer Evidence: The System Itself Can Be a Barrier
A 2024 qualitative study examined ADHD primary-care access in England from several perspectives. Researchers interviewed 11 healthcare professionals and nine people with lived experience, including young people ages 16–25 and supporters.
Three broad themes were identified:
- a healthcare system under stress
- ways the healthcare system itself can be difficult for people with ADHD to navigate
- strategies for improving ADHD primary-care provision
Participants described problems involving inconsistent processes, unclear responsibilities, limited clinician support, and difficulty navigating access. The authors recommended more standardized ADHD management in primary care, better information and support for healthcare professionals, and greater use of reasonable adjustments.
A More Accurate Frame Than “Bad Gatekeepers”
Individual clinician knowledge and attitudes can affect access. But newer research suggests the issue is also structural.
Barriers can involve:
- insufficient ADHD training
- unclear responsibility between primary and specialist services
- long waits and service gaps
- inconsistent shared-care arrangements
- administrative processes that require substantial executive functioning from the person seeking help
This keeps the focus on both clinician education and system design.
Limits
These findings should not be generalized to all healthcare systems. In the United States and other countries, referral pathways, diagnostic authority, insurance requirements, and prescribing rules differ substantially.
The 2024 study was qualitative and relatively small. It gives detailed accounts of experience rather than population-level estimates.