When OCD and Autism Overlap: Understanding the Similarities and Differences & Why They Matter in Therapy
Written by: Allyson Inez Ford, MA, LPCC, ED and OCD Therapy Founder
Ocd or Austism…or both?
If you have ever wondered whether your routines and rituals are related to OCD, autism, or both, you are far from alone. The overlap between these two neurotypes is quite common. As a therapist, it is clinically important to distinguish as therapy will look different depending on the root function of the behaviors. And the stakes of getting it wrong are high, for the person seeking help and for the strength of the therapuetic alliance.
This blog post is for clinicians who want to hold that complexity with more nuance and more grounding in what neurodiversity-affirming therapy actually requires when OCD and autism are present. This is also for anyone out there trying to understand their own neurodiversity more.
Observable Behaviors Vs. Identifying the Root Function
OCD and autism share a number of surface-level features that can make differential diagnosis feel like an impossible puzzle. Both can involve repetitive behaviors, rigid routines, intense focus on specific topics or objects and significant distress when things do not go as expected. Both can look like anxiety. Both can involve what a neurotypical observer might call inflexibility.
But sharing surface features is not the same as sharing a mechanism. And treating them as interchangeable, or worse, treating autistic traits as OCD symptoms, causes real harm.
Clinical training in this area, including the work of Aiden Reis and Sharon Aguilar of Diverge Counseling, has helped clarify some of the key distinctions that get lost when we apply a purely pathology-based lens to neurodivergent clients.
OCD Compulsions vs. Autistic Repetitive Behaviors: A Critical Distinction
One of the most important places to slow down is in how we understand repetitive behavior. In OCD, compulsions are things a person feels they must do to prevent anxiety or a feared outcome. They are driven by distress and temporarily relieved by the behavior. They tend to feel ego-dystonic, meaning the person often does not want to be doing them and experiences significant internal conflict about it.
Autistic repetitive behaviors, including stimming, echolalia and routines, operate very differently. As Reis and Aguilar describe in their training on differentiating autism from OCD, these behaviors can be enjoyable, supportive of sensory regulation and helpful for executive functioning and processing. Stimming is repetitive self-stimulation behavior that serves a soothing purpose. Echolalia (repeating words, phrases or lines from media) can functions as soothing, sensory seeking and/or communication. Routines reduce the cognitive load of navigating a world that is often unpredictable and sensory-overwhelming.
These are not behaviors to be extinguished via harmful therapies like ABA. They are adaptive responses to a neurotype that experiences the world with a different sensory and processing architecture. If you are new to understanding neurodiversity affirming therapy, please read up on the trauma of forced behavioral therapies like ABA on the autistic community.
So how do we tell the difference if They Can look So SIMILAR?
Reis and Aguilar offer a set of orienting questions worth exploring with clients:
What would happen if you did not do this?
Is this behavior interchangeable with another repetitive behavior?
Does this happen only when anxious, or also when content or happy?
How does doing this help you?
Is this something you find time-consuming or distressing?
The answers to those questions will reveal a lot- and it is your job as the therapist to believe your clients!
A compulsion tends to be rigid, anxiety-driven and not usually interchangeable. Compulsions also do not actually reduce the distress the person is feeling (it may in the short term, but not in the long term). An autistic routine or stim is often present across emotional states, not just anxious ones. Routines and stims also reduce the distress without reinforcing the obsessive-compulsion cycle.
Where Misidentification Can Harm
Here is where the stakes can get high. When an autistic ritual, routine, or stim gets misidentified as an OCD compulsion, the standard treatment response is Exposure and Response Prevention Therapy (ERP). ERP asks clients to face their fears gradually, resist the compulsions and sit with the discomfort. The idea is to allow anxiety to peak and then decrease without engaging in the compulsion so the brain gets the chance to learn a new, more functional lesson: compulsions are not needed to cope with distress of intrusive thoughts.
For genuine OCD compulsions, ERP has a strong evidence base. But applied to an autistic repetitive behavior, it can be incredibly harmful. Autistic folks cannot habituate to sensory distress and attempting to do so can be traumatic.
A (sadly) common example:
Imagine a client who has a specific routine they follow before starting a task, a particular order of steps, a way of arranging their workspace, a phrase they say or repeat internally before beginning. A clinician operating without a neurodiversity-affirming framework might identify this as a compulsion and begin ERP targeting it. The client is asked to resist and told those behaviors are ‘maladaptive’. They are told the discomfort will pass. They are guided through the logic that the routine is maintaining their anxiety rather than helping them in any kind of functional way.
But what if that routine is not OCD? What if it is an autistic accommodation, a way of reducing executive functioning demands, managing sensory input and creating enough predictability to actually engage with the task at hand?
Trying to Strip Autistic behaviors away through Exposure Therapy (ERP) does not work
Doing so is incredibly ableist and can cause sensory trauma for the client. This removes a client’s agency and positions the therapist as expert. This communicates to the client that their way of moving through the world is wrong, disordered and forces them to perform or mask. This becomes yet another parallel to how neurodivergent clients experience a world built for neurotypical people- disabling, invalidating and oppressive.
So much can shift if we slow down and ASK the client which behaviors are related to OCD vs. Autism- and which ones they even care to challenge. When treating OCD through a neurodiversity affirming lens, we follow the clients lead- we don’t impose our own agenda.
Other Places the Lines Blur
The confusion between OCD and autism does not stop at repetitive behaviors. Reis and Aguilar share several other areas where clinicians commonly misread autistic traits through an OCD lens.
For example:
"Just right" OCD versus sensitivity to clothing textures. The former involves distress driven by an internal sense that something is not exactly as it should be. The latter is a sensory processing difference where the fabric genuinely feels intolerable in a way that is physiological, not anxiety-based.
Compulsive rumination versus processing differences. OCD rumination tends to loop around feared outcomes and seeks reassurance or resolution. Autistic processing can involve extended, circular thinking that is not necessarily anxiety-driven but reflects a different cognitive rhythm. The key distinguishing feature is that it does not fuel the obsessive-compulsive cycle and is present across different emotional states.
Obsessions versus monotropic focus. OCD obsessions are intrusive and ego-dystonic, meaning the person does not want to be thinking about them. Monotropic focus in autism is an intense, often pleasurable and voluntary immersion in a topic or special interest that brings meaning, joy and regulation.
Hyper-responsibility versus hyper-empathy. OCD can involve an inflated sense of responsibility for preventing harm to others. Autistic hyper-empathy is a profound attunement to the emotional states of others that can be overwhelming but comes from a very different place.
Health anxiety versus what Reis and Aguilar describe as "all the things," a pattern in autistic clients of tracking many simultaneous physical sensations or concerns that reflects sensory awareness and interoceptive differences rather than a feared illness narrative.
What Neurodiversity-Affirming therapy for Autism and OCD Can Look like
Affirming care for autistic clients with OCD (and really any human being IMO) starts with curiosity before jumping into intervention. Before targeting any repetitive behavior or pattern that looks unusual through a neurotypical lens, we need to understand its function from the client's perspective, not ours.
It means learning the distinctions above not as a checklist but as a genuine framework for listening differently. It means sourcing knowledge from autistic clinicians, researchers and community members with lived experience.
It means holding the mainstream OCD treatment model loosely enough to ask: is this a symptom to treat, or an accommodation to honor? And it means being accountable to the fact that ERP, applied without this discernment, is not a neutral or benign intervention for autistic clients.
For clients who are both autistic and have OCD (which is very common) the work requires careful calibration so that ERP targets actual ego-dystonic compulsions and not the routines, stims and rituals that are doing important regulatory and adaptive work for autistic clients. This requires ongoing collaboration with the client about what distresses them versus what supports them, and a willingness to revise our assumptions regularly.
Offering alternatives to ERP
Further, because of the bottom-up processing style many autistic people experience, Inference-Based CBT (I-CBT) for OCD can be a preferred and more accessible approach to working with autistic clients. Something I personally do is present both options to clients and let them decide which one aligns with them more. No two autistic people are the same, so treatment shouldn’t be either. You can always go back and use a different model (or refer to someone who does) if the initial one does not yield the results the client is looking for.
A Final Note
The goal of neurodiversity-affirming practice is not to avoid treating OCD in autistic clients. It is to treat it accurately, with enough clinical sophistication to know what we are actually looking at, and enough humility to let our clients' lived experience inform the entire process.
Getting this right is not just a technical skill. It is an ethical commitment to not causing harm in the name of evidence-based practice.
Looking for autistic affirming OCD therapy in CA, WA, UT, TN, MD or FL?
Reece Thomas, a therapist on our team has lived experience with both Autism and OCD and is a wonderful clinician to work with and relate to!
Reach out to learn more about our approach. We offer free 15 minute intro calls so you can see if we are a good fit for you or a loved one.
Resources for more learning:
Autistic Affirming ERP Training by Diverge Counseling | Autistic Self Advocacy Network
Embrace Autism: Self Assessments and other educational resources | Rethinking OCD, Safety and Nourishment: RDs for Neurodiversity Course
