If you’re considering getting assessed for ADHD, one of the first questions you’re likely asking is: how long will this take? Between work commitments, family responsibilities, and the mental load of finally seeking help, understanding the time investment involved in an ADHD assessment is crucial for planning ahead.
The answer isn’t straightforward, as ADHD assessments can vary significantly depending on who conducts them and what method they use. Let’s break down what you can expect in Australia, particularly when working with a GP versus other healthcare providers.
The Initial Consultation: 30-60 Minutes
Most ADHD assessments with a GP begin with an initial consultation that typically lasts between 30 and 60 minutes. This is longer than a standard GP appointment because your doctor needs to gather comprehensive information about your symptoms, history, and how ADHD affects your daily life.
During this appointment, your GP will ask about:
- Your current symptoms and when you first noticed them
- How these symptoms impact your work, relationships, and daily functioning
- Your childhood behaviour and school performance
- Your family history of ADHD or related conditions
- Any other mental health concerns like anxiety or depression
- Your medical history and current medications
Some GPs who specialise in ADHD may use structured assessment tools or questionnaires during this appointment, which you might complete beforehand or during the session.
Follow-Up Appointments: Building the Full Picture
ADHD assessment isn’t always completed in a single visit. Many GPs prefer to schedule follow-up appointments to ensure they’re making an accurate diagnosis. This might involve:
- A second consultation to review questionnaire results or gather additional information (30-45 minutes)
- Reviewing collateral information from family members, partners, or old school reports
- Monitoring your response to treatment if medication is trialled
In total, the assessment process with a GP usually spans 2-3 appointments over several weeks, though some experienced ADHD GPs may be able to complete the assessment in one comprehensive session if the presentation is clear.
Telehealth Assessments: Same Duration, More Convenience
The good news is that telehealth ADHD assessments take the same amount of time as in-person appointments. The consultation length doesn’t change—you’ll still need that initial 30-60 minute discussion and any necessary follow-ups.
What does change is the convenience. You can attend your appointment from home, during your lunch break, or wherever you have a private space and internet connection. There’s no travel time, no waiting rooms, and no taking half a day off work to see a specialist across town.
Telehealth assessments follow the same clinical guidelines as face-to-face appointments, so you’re receiving the same quality of care, just with added flexibility.
Psychiatrist vs Psychologist Assessments: The Time Difference
If you’re comparing options, it’s worth knowing that assessments with psychiatrists or psychologists often take considerably longer than GP assessments.
Psychologist assessments typically involve:
- Initial clinical interview (60-90 minutes)
- Cognitive and psychological testing (2-4 hours across one or more sessions)
- Feedback session to discuss results (30-60 minutes)
This comprehensive approach can total 4-6 hours of appointments, often spread across multiple weeks, with costs that vary widely between providers.
Psychiatrist assessments are usually shorter than psychologists’ but longer than GPs’, often involving 60-90 minute initial consultations plus follow-ups, with fees that vary by provider.
Why GP Assessments Can Be More Efficient
GPs experienced in ADHD can conduct thorough, clinically appropriate assessments in less time than other healthcare providers. This isn’t because they’re cutting corners—it’s because the diagnostic criteria for ADHD are primarily based on clinical interview and history, not extensive psychological testing.
Australian GPs with ADHD experience can:
- Diagnose ADHD according to DSM-5 criteria
- Prescribe ADHD medications including stimulants
- Provide ongoing management and script renewals
- Bulk bill or charge significantly less than specialists
For many adults, this pathway is not only faster but more accessible and affordable.
What About Wait Times?
Beyond the appointment duration itself, you’ll want to consider how long you’ll wait to get an appointment in the first place.
The average wait for a first ADHD assessment appointment with a psychiatrist in Australia is around 16 weeks, and up to a year.1 Psychologists may have waits of several weeks to months. In contrast, GP clinics that specialise in ADHD, particularly telehealth services, often have appointments available within days or weeks.
This means the total time from deciding to seek help to actually starting treatment can be dramatically different depending on which pathway you choose.
Preparing for Your Assessment: Save Time
Regardless of who conducts your assessment, you can make the process more efficient by preparing beforehand:
- Write down your symptoms and specific examples of how they affect your life
- Gather any old school reports or performance reviews that mention relevant difficulties
- Ask family members about your childhood behaviour
- List any previous mental health diagnoses or treatments
- Complete any pre-assessment questionnaires thoroughly
Coming prepared means your clinician can focus on understanding your experience rather than prompting for basic information.
The Bottom Line
An ADHD assessment with a GP typically takes 30-60 minutes for the initial consultation, with possible follow-ups adding another 30-45 minutes each. The entire diagnostic process usually spans 2-3 appointments over several weeks, though some cases may be completed in a single comprehensive session.
This is considerably less time-intensive than assessments with psychologists (4-6 hours) or the wait for a first psychiatrist appointment (around 16 weeks on average1).
For most Australian adults seeking an ADHD diagnosis, a GP with experience in ADHD offers the most efficient, affordable, and accessible pathway to assessment and treatment.
If you’re ready to take the next step, ADHD GP Australia offers comprehensive telehealth assessments with experienced GPs who specialise in adult ADHD. Our appointments are thorough yet efficient, and most patients can be seen within days rather than months. Book your assessment today and start your journey toward better understanding and managing your ADHD.
1 Average wait for a first adult ADHD assessment appointment with a psychiatrist in Australia is 16 weeks, and can be up to 52 weeks. O’Toole et al., Journal of Attention Disorders, 2026. All sources
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