How long should an ADHD diagnostic report take? UK norms

How long should an ADHD diagnostic report take? UK clinicians have usually spent three to six hours per assessment turning notes into a structured diagnostic report. AI-assisted drafting cuts that to under an hour. The measure that matters now is how long checking takes, and that is the step platforms such as Cerebric are built around.

Through Cerebric we work with many clinicians who write these reports, and a common complaint is finishing them in the evening, after the working day has ended. Below I set out what decides how long a report takes, what the published UK benchmarks say, and where time can be saved without lowering quality.

Why report writing time varies so much

Report writing time is everything that happens between the end of the clinical interview and a signed diagnostic report that is ready to send: putting the history together, remembering or typing up the consultation, scoring and comparing questionnaires, matching findings to the diagnostic criteria, writing recommendations, and proofreading. Four factors cause most of the difference.

What "report writing time" actually coversInterview endsPull together the historyTranscribe consultationScore questionnairesMatch findings to criteriaclinician's judgementDecide recommendationsclinician's judgementCheck and signclinician's judgementReport writing time runs from the end of the clinical interview to a signed report that is ready to send. Drafting does the gathering stages, pulling the history, the transcript and the scored questionnaires into the sections of the report. Whether the evidence meets the criteria and what to recommend are decided by the clinician, who then checks and signs; checking time is now the better measure.The stages between the end of the interview and a signed report, and which of them the clinician carries out.

How complex the case is. A straightforward presentation with a clear developmental history writes up quickly. Add co-occurring depression or anxiety, a possible autism overlap, or a disputed account of childhood, and the differential diagnosis discussion alone can double the writing time.

How much informant evidence there is. A thorough adult ADHD assessment draws on the patient interview, an informant interview, school records where available, GP notes, and structured tools such as the DIVA-5 and rating scales. Every extra source must be summarised, weighed, and fitted in with the rest of the picture. Each one adds minutes to the interview and, when you write everything yourself, much longer to the write-up.

Template quality. A clinician starting from a blank page rebuilds the structure every time. A template mapped to the criteria, with clear prompts for each section, removes that work. It is often the biggest factor you can control when reports are written by hand.

Interruptions. Reports written in fragments, thirty minutes here, an hour there, across several days, take far longer than the same report drafted in one protected block, because each restart means re-reading your own notes to get back into the case. Writing in bits also hurts accuracy, because memory of a consultation fades quickly.

There is a fifth factor: audience. A diagnostic report must serve the patient, their GP (often for shared care), and sometimes an employer or education provider. Writing something clinically sound and readable takes longer than writing for colleagues alone.

Two of these factors largely come with the case; the clinic can control the other three.

What a good report looks like

The Adult ADHD Assessment Quality Assurance Standard (AQAS) is a quality standard agreed and written by members of the UK Adult ADHD Network (UKAAN) and published in Frontiers in Psychiatry in 2024. It exists because, until recently, there was no shared standard for what a good adult ADHD assessment, or report, contains.

On the report itself, AQAS is specific. All relevant information from the assessment should be recorded "in sufficient detail to demonstrate a robust and valid diagnostic assessment". That means:

• real-life examples of symptoms, not just ticked checklist items;
• evidence that informant information was sought and how it shaped the clinical picture;
• a clear record that the diagnostic criteria were reviewed, and whether they were met;
• a summary of co-occurring conditions;
• a statement that the symptoms are not better explained by another condition.

The report should show the areas of life where there is at least moderate impairment, across at least two settings.

On length, AQAS is direct: "The length of a report does not necessarily serve as a marker for quality."

This fits with NICE NG87, which requires diagnosis by a suitably qualified specialist after a full clinical and psychosocial assessment, a complete developmental and psychiatric history, and observer reports, and warns that a diagnosis should never be made on rating-scale data alone.

So if you are measuring report time, judge quality by how well claims are linked to evidence rather than by word count. We cover the full standard in our AQAS checklist for providers.

UK benchmarks

There is no NICE or NHS time standard for writing an ADHD diagnostic report. The figures we have come from providers' own experience.

Writing by hand is the starting point. Across UK adult ADHD services, turning session notes into a structured diagnostic report commonly takes three to six hours per assessment, on top of a clinical interview that itself runs two hours or more. The write-up often takes longer than the assessment. AI-assisted drafting shortens the drafting step, often to well under an hour, but as shown below, drafting speed is only part of the picture.

Our own data goes further. At clinics using Cerebric, report writing that used to take around two hours now takes under 30 minutes in total, draft to sign-off.*

Where report time goes: drafting versus checkingDraftingChecking by the clinicianDrafting time no longer neededManual write-up from notes: 3 to 6 hoursDrafting 3 to 6 hoursAI scribe: draft under 1 hour, then a check that variesDraftCheck (varies)Cited draft, checked by the clinician: under 30 minutes totalDrafting time can fall to near zero, but the clinician still reviews and checks every section before signing, and that recorded review is part of what makes the report hold up at audit. The manual and AI-scribe figures come from the UK provider benchmarks in the table beside this chart. The cited-draft row was measured at UK Right to Choose and private neurodevelopmental providers using Cerebric, 2025–26. The AI-scribe check varies because, without citations, checking depends on memory or re-listening to the recording.Measured at UK Right to Choose and private neurodevelopmental providers using Cerebric, 2025–26.

One consultant psychiatrist using Cerebric told us: "I had my report, recommendations and all, finished by 5pm. I love how quick and easy it makes filling in all the DIVA boxes. I am over the moon."

A note on that under-30-minutes figure: checking is now the slowest step. The clinician signs the report and is responsible for every sentence in it, so the check has to happen however fast drafting becomes. What matters is how long it takes. When a draft cites its sources (each sentence linked to a transcript timestamp, a questionnaire answer, or a document), the clinician can check each sentence against its source. When it does not, checking means re-listening to the recording or relying on memory, which takes much longer and is more likely to be skipped.

*Measured at UK Right to Choose and private neurodevelopmental providers using Cerebric, 2025–26.

How to cut report time without cutting quality

Fix the template first. Before touching any AI tool, build a report template mapped to what AQAS and NICE expect: sections for symptom evidence with real-life examples, informant findings, criteria review, co-occurring conditions, impairment by area of life, and recommendations. With a good template, writing becomes a matter of filling in set sections.

Collect the evidence before the appointment. Much "report writing time" is spent chasing: waiting for a parent questionnaire, scoring a rating scale, hunting for school records. With online intake, patient and informant questionnaires that score themselves, and automatic reminders, the evidence arrives, scored, before the appointment. The write-up then starts with the evidence already in place.

Know the difference between dictation, scribes, and cited drafting. Dictation turns your speech into text: you still write every sentence yourself. An AI scribe listens to the consultation and drafts text (fast), but the draft has no links back to the evidence, so checking depends on your memory or the recording. Cited drafting writes a draft report from the transcript and questionnaire data with every sentence linked back to its source, so checking is a quick look at the source. The three are often confused, and we compare them in more detail in AI scribes vs assessment platforms.

Write same-day, in one block. Whatever tools you use, a report drafted the same day in one protected sitting is faster and more accurate than one put together in bits over a week. If your clinic's diaries make same-day write-up impossible, the real problem is the diary, not the writing.

Replace informal proofreading with a QA checklist. A set checklist at approval (criteria recorded, areas of impairment stated, informant evidence cited, reasons for medication given) catches gaps faster than a general re-read, and it also serves as audit evidence.

What to do next

If your clinicians write ADHD reports by hand and regularly spend more than three to four hours on each, the fix is usually a better template and collecting evidence before the appointment, not typing faster. If you are starting to use AI drafting, under 30 minutes from draft to signature is possible, but treat the clinician's check inside that time as protected clinical time. Whichever way you work, hold it to the AQAS bar (linked to evidence, focused on impairment, enough detail), because a report that fails an audit will need redoing. Measure your own typical (median) time from the end of the interview to sign-off, so you know where you are starting from.