Expert Autism Assessments for Children, Teens, and Adults
If you or your loved one struggles with social communication, sensory sensitivities, repetitive behaviors, or relationship challenges, an autism assessment can provide clarity and direction. At Grey Matter Psychological Assessment, we provide professional autism testing in Santa Monica, California, and proudly serve families and adults throughout Greater Los Angeles and virtually across California.
Who You'll Work With
Real clinicians, not a call center — here's who's actually behind your evaluation.
Dr. Quincee Gideon
"A diagnosis isn't a label — it's a map. My job is to hand you that map in a way that actually makes sense for your life, not just check a clinical box."
Dr. Megan Johnson
"I bring the same commitment: to see the whole person, not just the question I've been asked to answer."
What is Autism?
Autism is a neurodevelopmental diagnosis, which means that something different (but powerful!) is happening in your brain. That difference is not a bad thing, but it can feel like a bad thing when you aren’t sure what is happening to you. Autism is a developmental disorder that affects how people communicate, interact with others, and experience the world around them. It is diagnosed on a “spectrum” because it includes a wide range of strengths, challenges, and ways that people think or behave.
The good news? It is diagnosable and you can get resources and support that could completely change your life. You just need the right testing in order to get an autism diagnosis. We’ve become mavens at providing the best autism assessments so that you can finally get clear on how your brain works.
In your autism assessment, we test your neurological functioning and collect meaningful data about your educational, social-emotional, and developmental history. Why? Because getting the diagnosis right can provide you with high-impact resources and recommendations for managing your overwhelm. We write a report that helps you advocate for yourself at your school and/or work. Our reports include all the necessary information for you to advocate for your needs when you submit them to your work or school’s Disabilities Office. You can’t get testing accommodations unless you have one of these reports.
Autism Looks Different at Every Age. Testing Adapts With It.
The same underlying traits show up in different ways depending on where someone is in life, which is exactly why we tailor each evaluation to the person in front of us, not a one-size-fits-all script.
Ages 6–12
Social-communication challenges, sensory sensitivities, or repetitive behaviors that show up at school, in play, or in relationships with other kids.
A clear diagnosis now opens the door to school-based support and services while your child is still building the skills testing identifies.
Adolescence
Traits that were missed in early screening, or masked long enough that nobody caught them, now showing up as social friction, burnout, or grades that don't match effort.
Clarifies what's actually going on and builds a plan for academic and social support, before it follows them into adulthood unexplained.
Adulthood
A lifelong sense of being "different," or years of quietly working harder than everyone else just to meet ordinary social expectations.
A comprehensive evaluation gives you real documentation, for workplace or higher-education accommodations, and an answer that may have been missing for years.
What's Included in Our Autism Evaluation
Full clinical interview and developmental history
Standardized, validated testing measures
Careful scoring and interpretation
A detailed written report
Individualized, actionable recommendations
A feedback session to walk through it all with you
Symptoms & Signs We Assess
Autism presents differently in every person we see. A comprehensive evaluation looks across all of these areas, not just the ones that are obvious from the outside.
Communication style and development
Social reciprocity
Non-verbal communication
Routines and repetitive behaviors
Sensory responses
Daily living skills
Our Testing Approach
Clinical Interview Alone
A conversation with a clinician can suggest autism is worth looking into further. It's a reasonable first step — but it isn't a diagnosis, and it isn't accepted for school, workplace, or testing-board accommodations.
Comprehensive Testing
Standardized, validated measures across sensory processing, social-emotional development, cognitive skills, and more, alongside a full clinical interview and history. This is what produces real documentation and an actual diagnosis, not a preliminary read.
What Does Autism Testing Actually Cost?
Every evaluation below includes a full clinical interview, standardized testing, a written report, and a feedback session. Your exact fee is confirmed on your consultation call, before anything is scheduled.
Autism Evaluation
Full comprehensive testing for autism on its own. This is what produces documentation for school, work, or exam-board accommodations.
Combined AuDHD Evaluation
Testing for autism and ADHD together, in one process. One report, not two conflicting ones.
Educational Evaluation
Dyslexia, dyscalculia, and other learning differences, with school-ready accommodation documentation.
Superbills provided for every evaluation, for out-of-network insurance reimbursement.
Why Choose Grey Matter for Testing
- âś“Licensed psychologists, not trainees or unsupervised associates
- âś“A neurodivergent-affirming approach, not a pathology-first one
- âś“Detailed reports built for real accommodations, not a vague label
- âś“In-office in Santa Monica or virtual anywhere in California
- âś“Evaluations for children, teens, and adults, under one roof
Have You Been Masking Your Autism for Most of Your Life?
Intelligent, high-masking individuals are the ones we see missed most often, usually not diagnosed until well into adulthood, after years of being told they were just sensitive, intense, or a perfectionist.
- Feeling socially overwhelmed even in situations you're "supposed" to enjoy
- Studying social cues consciously instead of reading them automatically
- A strong need for routine, and real distress when it breaks
- Deep, narrow interests that take up most of your bandwidth
- Sensory sensitivities you've learned to hide in public
- A lifelong, private sense of being fundamentally different
Frequently Asked Questions
-
We assess children (6+), adolescents, and adults.
-
Evaluations typically span multiple sessions over a few weeks, including intake, testing, and feedack.
-
Yes— our detailed report supports school planning and disability services accommodations.
-
Yes- virtual evaluations for California residents are available.
Not Sure Autism Is the Whole Picture?
We test for a lot more than autism alone. If something else on this list sounds closer to what you're dealing with, start there instead.