ADHD vs Autism in Singapore: Who Decides, and What Changes

The difference, in plain words

The long symptom tables are easy to find, and you have probably read one already. Here is the short version, and then this page moves on to the part those sites cannot tell you, which is what happens in Singapore.

The two conditions are described by different things. ADHD is described by two groups of characteristics: inattention, and hyperactivity with impulsiveness. Autism is described by two different ones: lasting difficulty in starting and keeping up two-way social interaction and communication, and restricted, repeated, inflexible patterns of behaviour, interest or activity, which includes differences in sensory sensitivity.

Source for the first three rows: Young and colleagues, “Guidance for identification and treatment of individuals with attention deficit/hyperactivity disorder and autism spectrum disorder based upon expert consensus”, BMC Medicine, published 25 May 2020. A consensus group convened by the United Kingdom ADHD Partnership wrote it precisely because the two conditions turn up together and the guidance for that case was thin.

Camouflaging is worth one extra line, because it is the reason a quiet child gets missed. It means a child works out what the room expects and copies it, at a cost to themselves, so the pattern a clinic looks for is hidden under effort.

If you want the long clinical version of that comparison rather than our short one, a psychiatrist has already made it, and we would rather point you at her than write the same table again.

Watch on YouTube: Attention Deficit Hyperactivity Disorder vs Autism, How To Tell The Difference, by Dr. Tracey Marks.

We picked that one because Dr Tracey Marks is a practising psychiatrist and the video is titled for exactly this question, how to tell the difference. It runs about eleven minutes. Her channel is American, so the Singapore half of the answer is this page’s own job.

Is ADHD part of the autism spectrum?

No. They are two separate diagnoses, and neither is a version of the other.

The clearest proof of that sits in the history. Under the older manual, DSM-IV, an autism diagnosis ruled ADHD out: a clinician was not allowed to give both. You only write a rule like that for two separate things. DSM-5 dropped it in 2013, so now both can be recorded, and they are still two diagnoses rather than one.

Singapore’s own services treat them as separate too. KKH’s Department of Child Development lists seven conditions it sees, and autism spectrum disorder and attention deficit hyperactivity disorder are two different entries on that list.

Yes, a child can have both, and it has a plain name

A child can have ADHD and autism at the same time. There is no third diagnosis for the pair and no special label: a clinician writes both down, and the words used for that are co-occurring, or the older word comorbid. If someone tells you it must be one or the other, that instruction is at least thirteen years out of date.

Until DSM-5 came out in 2013, it genuinely was one or the other. The earlier manuals stopped clinicians from giving both diagnoses at once, and autism was written in as a reason to rule ADHD out. DSM-5 removed autism from that list of exclusions, and the 2020 consensus paper calls the removal a fundamental change from the manual before it.

How often the two go together is not a small number. Across many separate studies pooled into one estimate, about 21 per cent of people diagnosed with ADHD also have autism. That is roughly one in five, and it is worldwide research rather than a Singapore count.

The same paper is honest about what that change left behind. Because the pair was not formally recognised until 2013, understanding of the two together is “less established” than understanding of either alone, and there is “little guidance in the clinical literature”. That is the gap the paper was written to fill, and it is also why a parent can get two different answers from two sensible people.

The one that is hardest to tell apart

The hard case is not the child who climbs the furniture. It is the quiet one. A child who drifts off in class, loses the thread of a game, and does not join in can look like inattentive ADHD from one angle and like autism from another, and from a sofa at home you cannot separate the two. That is what the assessment is for.

Two things make this pair specifically hard. The first is camouflaging, above: a child who has learned to copy what the room expects will hide the pattern a clinic is looking for, and the effort of doing it is invisible. The second is that inattention is the part of ADHD that stays steadiest as a child grows, while the hyperactive and impulsive part is the one that commonly fades, so an older quiet child can have ADHD with almost none of the behaviour the word makes people picture.

What clinics do about it is worth knowing, because it tells you what to bring. They look at the child in more than one setting. REACH, the community mental health service that works with Singapore schools, puts it plainly: information from at least one parent or caregiver, plus input from the child’s teachers, “is vital in understanding the needs and problems the student is facing”. MOE gathers the same two sides before it screens, using information from parents and teachers together with observations by trained school staff.

So the answer is not yours to work out alone. Two rooms describe the child and one clinician puts the description together.

Subtle is normal here. A pattern that took a teacher five months of the school year to name is not a pattern you should have caught in a week, and you are not late.

Who assesses both in Singapore, and how age changes the answer

This is the half of the question no global page can answer, and it turns on one thing: how old your child is. The starting door is different for a preschooler and for a child already in school.

Two details in that table matter more than they look. NUH’s unit is for the years before primary school, so a parent sent there for a seven-year-old is at the wrong door, although NUH says some transition and specialised programmes can extend into the primary years for selected children. And the referral does not start with you: the page names who calls, which is the school’s full-time counsellor, or a social worker or psychologist at a REACH partner organisation.

The first appointment at either hospital is one appointment, not one per condition. At NUH, a paediatrician who specialises in developmental and behavioural paediatrics does a clinical assessment and then tells you the next steps. At KKH, children flagged with developmental concerns “will meet our paediatricians at the first consultation in KKH for a comprehensive evaluation”, which KKH says may include further medical checks such as hearing tests and blood tests.

Because both conditions sit inside the same department at both hospitals, nothing stops the referral letter from naming both concerns. Asking for that costs you nothing and saves a conversation later. Our guide to KKH, NUH and the private route compares the three doors in full.

If it helps to know how many families are in this, the count is on the public record. MOH gave it in a parliamentary written answer of 27 February 2026.

Read that figure carefully, because it is easy to over-read. It counts children seen with any neurodevelopmental diagnosis, so it does not separate ADHD from autism, and MOH says it does not track children diagnosed and managed privately. What it does show is the direction, and the three hospitals behind the count are IMH, KKH and NUH.

The school route to an assessment

If your child is already in a mainstream school, there is a second route to an assessment, it runs through the school, and it is the route with an average waiting time MOE publishes.

MOE set the whole sequence out in Parliament on 3 February 2026, answering three questions from Dr Charlene Chen about when students are assessed. Here it is in order.

1. Before P1. With your consent, hospitals and EIPIC centres, which run the Early Intervention Programme for Infants and Children for under-sevens with developmental needs, pass transition information about a child’s developmental needs to the receiving primary school. You can also disclose it yourself on the school’s data collection forms.
2. In P1. Teachers run systematic screenings for language, literacy and numeracy. Special Educational Needs Officers, or SEN Officers, work alongside P1 teachers to spot children with social and behavioural difficulties and trouble settling in.
3. First support, no diagnosis needed. Those children get learning support programmes for literacy and numeracy, or TRANSIT, which stands for TRANsition Support for InTegration and runs in smaller class sizes.
4. If difficulty persists. Further screening follows, and MOE names what it covers: screening for specific learning difficulties, and “observations for symptoms of Attention Deficit Hyperactivity Disorder (ADHD) and Autism Spectrum Disorder (ASD)”. Both of your two words, in MOE’s own sentence.
5. The referral. School staff can then refer your child, with your consent, to an MOE Educational Psychologist. Consent is yours to give or withhold, and nothing moves without it.
6. The assessment. MOE prioritises these assessments at primary schools, and says they are “completed within an average of two months, though complex cases may take additional time”.
7. While you wait. Support does not pause. MOE says students keep being supported during the assessment, including time-bound in-class or pull-out help from a SEN Officer.

Two months is an average and not a promise, and it is an average for primary schools, which MOE says it prioritises. MOE also says its psychologists may ask REACH’s medical professionals for input, which is how a school assessment reaches a doctor without you booking one.

One thing the reply does not say, so this page will not either: whether an MOE Educational Psychologist’s report does the same job as a hospital diagnosis when you later apply for something that asks for one. Ask that question out loud at the referral meeting, because the answer decides whether you also need the hospital route.

The sentence in that reply worth pinning to your fridge is the first one. MOE “supports students in mainstream schools based on their learning needs, even when they do not have a formal SEN diagnosis”. You do not need a label in hand to ask the school for help this term.

What it costs

Start with the number that is published, because one sentence in it decides what you pay. At KKH, what you pay for the specialist consultation turns first on how your referral was written.

The subsidised range runs from maximum to minimum subsidy, so where you land inside it depends on your own eligibility. KKH also says the price list is “subject to revision without prior notice”, and that these fees leave out medication, laboratory tests and x-rays, with long consultation charges applied where needed.

Now the sentence that matters. As a Singapore Citizen or Permanent Resident, you get the subsidised rate if you were referred from a polyclinic or from the A&E of a public hospital, referred from a public hospital where you were already subsidised, or referred by a GP under CHAS, the Community Health Assist Scheme, which is the government scheme that lowers what you pay at a participating private clinic. You pay the private rate if you self-referred or walked in, if a GP outside CHAS or a private hospital referred you, or, and this is the trap, if you were referred from a polyclinic “to a specific doctor”.

Read that last one twice. Asking the polyclinic to send you to a named doctor can move you from about S$44 to about S$239 for the same first appointment. If somebody has recommended a specialist by name, get the referral written without the name on it. What the subsidy covers across the whole road is in our guide to what an assessment costs in Singapore.

What the second label does not change at school

Inside a mainstream school, less than you would expect. That is the finding a parent most needs and almost never gets, so here is the evidence for it rather than the reassurance.

MOE publishes one page for primary schools and one for secondary schools, both last updated on 16 January 2026, listing the needs a mainstream school can support. Attention deficit hyperactivity disorder is on both lists. So is autism, which MOE writes as “mild autism spectrum disorder”. That phrase is MOE’s category name and not ours: this site does not sort autistic children into mild and severe.

The point is that the two sit in the same list and draw on the same named provisions. A SEN Officer gives in-class support and individual or small group skills training. Teachers Trained in Special Needs and Teacher Leaders for Learning Needs spread the strategies to other staff. Circle of Friends is a peer support intervention for students with social and behavioural difficulties. Access arrangements for national examination papers can mean larger fonts or extra time. None of those is keyed to which of the two diagnoses your child holds.

Two provisions differ by school stage rather than by label. TRANSIT, the small-group programme for identified P1 students, and the learning support programmes for literacy and numeracy are primary school provisions. Facing Your Fears, an intervention for students with special educational needs facing anxiety, appears on the secondary page.

MOE has also said twice this year that the trigger is need and not paperwork. In its reply of 3 February 2026 it said support is given “based on their learning needs, even when they do not have a formal SEN diagnosis”. At the Committee of Supply debate on 3 March 2026 it said schools provide support “based on their specific learning needs”, that about 80 per cent of students with SEN are supported in mainstream schools, and that all primary schools have a minimum of two SEN Officers, with schools facing higher and more complex needs having up to four.

So what does the second label change? Three honest answers.

It changes the picture the school is working from, which is not nothing: a teacher who knows both are in play reads a flat afternoon differently. It can change what happens outside school. Check any scheme’s eligibility with the scheme itself. And it changes what a clinician is working with, which is what the 2013 change made possible.

What it does not change is your right to ask. The full list of what a mainstream school can do, and how to ask for it, is in our guide to support in mainstream schools. MOE adds one more route in that same statement of 3 March 2026: where a student needs medical or therapy support that MOE and its schools do not provide, schools “facilitate referrals to external resources”.

If the answer turns out to be both

Nothing about the road changes shape. You are not starting again, and you are not joining a second queue at a second hospital. The department that assessed one condition is the department that names the other.

What changes is the wording of what you ask for. Here is the week, in order.

1. If your child is not yet in primary school: ask the polyclinic, or your GP if they are a CHAS clinic, for a referral to KKH’s Department of Child Development or NUH’s Child Development Unit. Say in the room that both ADHD and autism are in question, so it goes into the letter.
2. Do not ask for a doctor by name. A polyclinic referral “to a specific doctor” is charged at the private rate. The same first consultation then costs about S$239 instead of about S$44.
3. If your child is already in a mainstream school: ask the school who its SEN Officer is, then ask for a referral to an MOE Educational Psychologist. Your written consent is what starts it, and MOE’s average for a primary school assessment is two months.
4. Take the two-settings notes from the box above. The clinic and the school will both ask for them, and this is the one part of the assessment only you can supply.
5. Ask the one question this page could not answer for you: whether the MOE psychologist’s report will be accepted anywhere you might later be asked for a hospital diagnosis. If the answer is no, run both routes.

If you have not done any of this before and the whole road is new, start at the three first steps instead, and come back to this page when the referral is the thing in front of you.

One action, then, and it is the same one whichever word the teacher used. Book the polyclinic or CHAS GP appointment, and ask for a referral that names both conditions. If your child is in school, ask for the SEN Officer by that title on the same day.