NHS vs Private ADHD Assessment: The Full Comparison

Three Pathways, One Very Confusing Decision

If you have been looking into getting an ADHD assessment in the UK, you have probably noticed that the information out there is, well, a mess. Some people say it is free on the NHS. Others say they paid over a thousand pounds to go private. And then there is this thing called Right to Choose that sounds too good to be true.

I work with people every week who are stuck at exactly this point. They know they need an assessment, they are fairly sure they have ADHD, and they just cannot figure out which route to take. So I wanted to put everything in one place, every pathway, every cost, every timeline, and the stuff nobody tells you about what happens after the diagnosis.

If you are not sure whether you should even be looking into assessment, our ADHD self-test is a good starting point. It is not diagnostic, but it can help you figure out whether a formal assessment is worth pursuing.

The Three Pathways at a Glance

Here is the big picture before we get into the details:

That table alone answers the most common questions I get. But the reality is more nuanced than a grid can capture. Let me walk you through each one properly.

NHS Assessment: Step by Step

The NHS pathway is the traditional route, and for most people, it is also the slowest. Here is how it works.

Step 1: See your GP. Book an appointment and explain that you believe you have ADHD. Bring examples of how symptoms affect your daily life, at work, at home, in relationships, and with finances. Be specific. "I have been late to every single meeting at work this month" is better than "I struggle with time."

Step 2: Your GP makes a referral. If your GP agrees that assessment is appropriate, they will refer you to your local NHS adult mental health team or specialist ADHD service. Some areas have dedicated ADHD clinics; others do not.

Step 3: You wait. And wait. As of early 2026, NHS waiting times for adult ADHD assessment range from 2 to 5+ years depending on where you live. Some areas, particularly in London and the South East, have waits exceeding six years. Over 500,000 people are currently on waiting lists across the UK.

Step 4: Pre-assessment screening. Eventually, you will receive questionnaires to complete. These typically include the DIVA 5.0 or ASRS screening tools, plus measures for anxiety and depression to rule out other explanations for your symptoms.

Step 5: The assessment itself. A psychiatrist or specialist practitioner will conduct a structured clinical interview, usually lasting 60 to 90 minutes. They will ask about your childhood, school experiences, work history, and current functioning.

Step 6: Results and treatment. If you are diagnosed, your clinician will discuss treatment options including medication and non-pharmacological support. Prescriptions are standard NHS prescriptions at £9.90 per item (or free with a prepayment certificate or exemption).

For more on what happens during the assessment itself, have a look at my guide on what happens at an ADHD assessment.

Right to Choose: Step by Step

Right to Choose is the pathway I wish more people knew about. It is essentially a legal shortcut that lets you access a private provider, paid for by the NHS.

The legal basis: Section 6a of the NHS Act 2006 gives patients in England the right to choose their healthcare provider for first outpatient appointments. This includes mental health assessments like ADHD.

Step 1: Book a GP appointment. Tell your GP you want to be referred for an ADHD assessment under the Right to Choose pathway. Name a specific provider if possible. Psychiatry-UK is the most widely used for ADHD Right to Choose referrals.

Step 2: Your GP sends the referral. The GP refers you to the provider you have chosen. The NHS pays for it. You pay nothing.

Step 3: You wait, but less. Current waiting times through Right to Choose providers like Psychiatry-UK sit at around 6 to 12 months. That is still a wait, but compared to 3 to 5 years on the NHS, it is a significant improvement.

Step 4: Complete questionnaires and attend assessment. The process from here is very similar to the NHS pathway: standardised questionnaires, a structured clinical interview, and a diagnostic report.

Step 5: Post-diagnosis treatment. If diagnosed, your Right to Choose provider will typically initiate medication and then write to your GP requesting a shared care agreement. This means your GP takes over prescribing, and you get your medication at standard NHS prescription rates.

Important: Right to Choose is currently available in England only. If you are in Scotland, Wales, or Northern Ireland, you will need to explore NHS or private options through your local health board.

I have written a full step-by-step guide on how to use Right to Choose for ADHD, including what to do if your GP has never heard of it.

Private Assessment: Step by Step

Going private is the fastest route, but it comes with costs that go beyond the initial assessment fee.

Step 1: Research providers carefully. This is the most important step. Look for clinics that are CQC registered (Care Quality Commission) if in England, or registered with the equivalent body in your nation. Check that the assessing clinician is a psychiatrist registered with the GMC, or a clinical psychologist registered with the HCPC.

Step 2: Book and pay. Private ADHD assessments typically cost between £500 and £1,500+ depending on the provider and what is included. Some offer payment plans. Always ask what the fee covers before you commit, because some clinics charge extra for the diagnostic report or follow-up appointments.

Step 3: Complete pre-assessment forms. Just like NHS and RTC, you will fill out standardised questionnaires and ideally provide an informant report from someone who knew you as a child.

Step 4: Attend the assessment. Most private assessments are conducted via video call, though some offer in-person appointments. A thorough assessment should last at least 60 minutes. If a provider is offering a 20-minute video call and calling it an assessment, that is a red flag.

Step 5: Receive your diagnosis and report. You should get a written diagnostic report and a letter for your GP requesting a shared care agreement.

Step 6: Navigate shared care. This is where private assessment gets complicated. Your private clinician will prescribe medication initially, but private prescriptions cost between £100 and £300 per month. To get NHS-rate prescriptions, you need your GP to agree to a shared care agreement. More on that below.

For the full breakdown of what to look for in a private provider, I have a detailed guide on private ADHD assessment in the UK.

Quality Comparison: Are All Assessments Equal?

This is one of the biggest concerns people have: "Will a private diagnosis be taken seriously?" The short answer is yes, as long as it is done properly. Here is how the pathways compare on quality:

All three pathways should use the same validated diagnostic tools and the same clinical criteria. The difference is not in what is assessed, but in who does it and how long it takes to get there.

Red Flags for Substandard Private Assessments

Watch out for:

• Assessments lasting less than 45 minutes
• No pre-assessment questionnaires or informant reports
• Clinicians who are not GMC or HCPC registered
• Clinics that are not CQC registered
• No written diagnostic report included
• Pressure to start medication immediately without proper discussion
• No differential diagnosis considered (ruling out anxiety, depression, sleep disorders, etc.)

If something feels rushed or off, trust your gut. A proper ADHD diagnosis in the UK follows clear guidelines, and you deserve a thorough one regardless of which pathway you choose.

What Happens After Diagnosis?

Getting diagnosed is a huge milestone, but it is really just the beginning. Here is what comes next.

Medication

If you and your clinician decide medication is right for you, the process looks different depending on your pathway:

• NHS: Your prescribing psychiatrist handles everything. Standard NHS prescription costs apply (£9.90 per item, or free if exempt).
• Right to Choose: Your RTC provider initiates medication and monitors titration, then requests shared care with your GP.
• Private: Your private psychiatrist prescribes initially at private prescription rates (£100 - £300/month), then writes to your GP requesting shared care.

For more on ADHD medication options and what to expect, read my guide to ADHD medication in the UK.

The Shared Care Agreement Challenge

Here is the part that trips a lot of people up. Around 40% of GPs initially refuse shared care agreements for privately diagnosed ADHD patients. That sounds terrifying, but the good news is that approximately 90% of these cases are eventually resolved with persistence, proper documentation, and sometimes involvement from the ICB (Integrated Care Board).

A shared care agreement means your GP agrees to take over prescribing from the specialist, so you can get your medication at NHS rates. Without it, you are stuck paying private prescription costs indefinitely. I have a whole post dedicated to navigating shared care agreements if you are dealing with this.

Non-Medication Support

Medication is not the only thing that helps. Many people find that working with an ADHD mentor makes a real difference in building practical strategies for daily life. Things like time management, organisation, emotional regulation, and motivation are all areas where mentoring support can be genuinely transformative.

If you are looking for tools to support your wellbeing alongside or instead of medication, apps like Sprout can help you build consistent self-care habits, which is something that tends to fall apart when ADHD goes unsupported.

Pros and Cons of Each Pathway

NHS

Right to Choose

Private

What If My GP Refuses?

Whether you are asking for a Right to Choose referral or trying to get a shared care agreement after a private assessment, GP refusal happens. Here is what to do.

If your GP refuses a Right to Choose referral:

1. Ask them to explain their reasons in writing
2. Remind them of the NHS Choice Framework and Section 6a of the NHS Act 2006
3. Show them the Psychiatry-UK GP information pack (available on their website)
4. Make a formal complaint through the practice manager if they still refuse
5. Contact your local ICB (Integrated Care Board) and explain the situation
6. Request a different GP at the same practice

If your GP refuses a shared care agreement:

1. Ask for the refusal in writing with specific reasons
2. Share the NICE guidelines (NG87) which support shared care for ADHD
3. Ask the private clinician to write directly to your GP with additional information
4. Contact your local ICB for support
5. If all else fails, consider transferring to a different GP practice

I have covered this in more detail in my post on what to do while on the NHS ADHD waiting list.

Which Pathway Should I Choose?

There is no single right answer here, but let me give you some honest guidance based on what I see working with clients.

Choose NHS if you are not in crisis, you can manage while you wait, and cost is a major factor. You could also explore NHS and Right to Choose simultaneously in England.

Choose Right to Choose if you are in England, you want a free assessment with a reasonable wait, and you are comfortable navigating potential GP pushback. For most people in England, this is the best balance of cost and speed.

Choose private if you need answers quickly, you can afford the upfront cost plus ongoing medication costs until shared care is agreed, and you are prepared to do some legwork with your GP afterwards.

Consider combining pathways: Some people get on the NHS waiting list and pursue Right to Choose or private. There is nothing stopping you from having multiple referrals active. If one comes through faster, great. You can always cancel the other.

And whatever pathway you choose, you do not have to go through it alone. Having an ADHD mentor can help you prepare for your assessment, manage the emotional rollercoaster of the diagnostic process, and build strategies for moving forward. Take a look at our services or check our pricing to see how mentoring could support you.