Are Adults More Prone to Autism Misdiagnosis?

PostedNovember 13, 2025

UpdatedNovember 13, 2025

ByMy Patient Advice

Author: Beatrice Holloway, MSc | Reviewed by: Dr. Rebecca Fernandez, MBBS

Yes, adult autism misdiagnosis remains surprisingly common, with many people receiving incorrect labels before their true neurodivergence is recognised. Often, adults are misdiagnosed with conditions such as anxiety, depression, or personality disorders. This happens because autistic traits in adults can look more subtle or overlap with other mental health symptoms, leading to misinterpretation and delay.

Adults tend to develop coping strategies like masking difficulties or adhering rigidly to routines that obscure autistic traits. These adaptive strategies, combined with resilient performance in school or work, often divert attention from underlying needs. As a result, many reach late adulthood before realising their challenges are rooted in autism, not solely emotional or relationship issues.

Why Misdiagnosis Happens in Adults

Here are some reasons adults may be misdiagnosed:

Overlapping symptoms with mental health conditions:

Traits like social anxiety, sensory overload, or emotional regulation differences may mimic mood disorders but stem from autistic processing preferences rather than internal conflict.

Lack of childhood reference:

A late diagnosis often occurs when early signs such as rigid interests or difficulty with changes in routine were either missed or attributed to shyness or eccentricity during childhood.

Diagnostic oversight due to gender or masking:

Adults who mask or conform socially may overwhelm clinicians with surface-level competence, even while struggling internally. Combined with outdated diagnostic tools biased toward male presentations, these factors deepen diagnostic delays.

Finally, misconceptions about autism being a childhood issue further delay recognition in adults. For accurate identification, clinicians must gather a full developmental history and consider adult-specific traits.

Visit providers like Autism Detect for personal consultations that account for adult presentation and history in autism evaluation.

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to misdiagnosis and differential diagnosis.

Beatrice Holloway, MSc

Author

Beatrice Holloway is a clinical psychologist with a Master’s in Clinical Psychology and a BS in Applied Psychology. She specialises in CBT, psychological testing, and applied behaviour therapy, working with children with autism spectrum disorder (ASD), developmental delays, and learning disabilities, as well as adults with bipolar disorder, schizophrenia, anxiety, OCD, and substance use disorders. Holloway creates personalised treatment plans to support emotional regulation, social skills, and academic progress in children, and delivers evidence-based therapy to improve mental health and well-being across all ages.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the author's privacy.

Dr. Rebecca Fernandez, MBBS

Reviewer

Dr. Rebecca Fernandez is a UK-trained physician with an MBBS and experience in general surgery, cardiology, internal medicine, gynecology, intensive care, and emergency medicine. She has managed critically ill patients, stabilised acute trauma cases, and provided comprehensive inpatient and outpatient care. In psychiatry, Dr. Fernandez has worked with psychotic, mood, anxiety, and substance use disorders, applying evidence-based approaches such as CBT, ACT, and mindfulness-based therapies. Her skills span patient assessment, treatment planning, and the integration of digital health solutions to support mental well-being.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the reviewer's privacy.