What changes when a child has autism and ADHD?
More than most families are told. The combination is not autism plus ADHD running side by side, it is a different pattern, and the two sets of needs regularly pull in opposite directions.
Here are the real co-occurrence numbers, what the overlap looks like day to day, and how a plan should handle both at once.
CDC reports that 14.4% of US children with a current ADHD diagnosis also have autism. Looking the other way, one population study found 28.2% of autistic children met criteria for ADHD.
How common is the combination?
Common enough that most families we work with are managing both, though the published numbers depend on which direction you measure.
| Direction measured | Figure | Source |
|---|---|---|
| Children with current ADHD who also have autism | 14.4% | CDC, from the 2022 National Survey of Children’s Health |
| Autistic children who also meet ADHD criteria | 28.2% | Simonoff et al., 2008, population-derived sample of 112 children aged 10 to 14 |
For scale, autism is not even the most common thing that accompanies ADHD. CDC reports that 77.9% of children with ADHD have at least one co-occurring condition, led by behavioral or conduct problems at 44.1% and anxiety at 39.1%.
You will see a range of 30 to 50% quoted widely. We could not find the study behind it, so it does not appear on this site.
Why it is not simply one plus the other
The two profiles frequently want opposite things.
Autism often brings a need for sameness, predictable sequences and advance warning. ADHD brings novelty seeking, lost track of the sequence, and a decision made before the warning registered. A child can insist the morning routine happen in exactly the right order and then abandon it at step two.
Q: Why does that matter for therapy?
A: Because a strategy built for one profile can undermine the other. A long visual schedule that reassures an autistic child can be far too long for the same child’s attention span.
Families often describe the combination as its own thing rather than two conditions added together, and the clinical picture backs them up.
Telling the two apart in the moment
This is the practical skill, and it is what a functional behavior assessment is for.
A child leaving the table looks identical whichever condition is driving it. Escaping a sensory demand and losing interest in a boring worksheet produce the same walk to the door, and they need opposite responses.
Q: How does a BCBA work that out?
A: By watching what reliably happens before and after, across enough instances to see the pattern, rather than guessing from the behavior itself.
Getting that wrong is how families end up with a plan that seems reasonable and changes nothing.
What a combined plan should do
One plan, one team, goals that acknowledge both profiles.
In practice that means shorter routines than a pure autism plan would use, more movement built in, and reinforcement delivered sooner because waiting until the end of a long sequence asks too much. It also means the plan gets reviewed against data rather than impressions.
Budding Futures ABA works in homes and, where a school agrees to it, during the school day, across Colorado rather than Denver alone. Clinical Director Rachel Blackburn, BCBA sets goals from assessments like VB-MAPP and ABLLS-R and reviews session data weekly.
The dual diagnosis also changes the paperwork in your favour. An autism diagnosis is what opens ABA coverage under Colorado’s private-insurance mandate and under TRICARE, and neither of those is triggered by ADHD on its own.
Frequently asked questions from parents
Q: How often do autism and ADHD occur together?
A: It depends which direction you measure. CDC data show 14.4% of children with a current ADHD diagnosis also have autism spectrum disorder. A population-derived study of 112 children aged 10 to 14 found 28.2% of autistic children met criteria for ADHD.
Q: Why do some sites say 30 to 50%?
A: We could not trace that range to any study, so we do not use it. The two figures above come from named, checkable sources.
Q: Could a child have had both diagnoses years ago?
A: Not formally. Before 2013, diagnostic rules did not allow autism and ADHD to be recorded together. The DSM-5 changed that, which is one reason the combination looks like a newer phenomenon than it is.
Q: What does the overlap look like day to day?
A: Often contradictory. A child may need routines to be identical every time and still lose track of the routine halfway through. Sameness and distractibility can sit in the same afternoon.
Q: Which diagnosis gets treated first?
A: Neither, ideally. A single plan should target both, because separate programs tend to give conflicting instructions and the child pays for that.
Q: Does having both change what insurance covers?
A: Yes, significantly. An autism diagnosis opens ABA coverage under Colorado’s private-insurance mandate and TRICARE, neither of which is triggered by ADHD alone.
More on ADHD and ABA therapy
ABA Therapy for ADHD and Autism
What a combined plan targets, and what it will not fix.
Does Insurance Cover ABA Therapy for ADHD?
The three Colorado routes and which ones need an autism diagnosis.
In-Home ABA Therapy Across Colorado
One BCBA-led plan covering both profiles, at home.
Sources
CDC
Data on ADHD in Children, co-occurring conditions among children with current ADHD.
Danielson et al., 2024
ADHD Prevalence Among U.S. Children and Adolescents in 2022, Journal of Clinical Child & Adolescent Psychology.
Simonoff et al., 2008
Psychiatric Disorders in Children With Autism Spectrum Disorders, JAACAP.
Managing both diagnoses at once?
Tell us what the hardest part of the day looks like. We will explain how a single plan would handle both profiles and what your coverage allows.