How Do ICD-11 Autism Codes Compare to DSM-5 Codes?

PostedNovember 15, 2025

UpdatedNovember 15, 2025

ByMy Patient Advice

Author: Lucia Alvarez, MSc | Reviewed by: Dr. Rebecca Fernandez, MBBS

The ICD-11 vs DSM-5 autism codes serve a similar purpose in classifying autism, but there are notable differences in how each system is used and what it focuses on. While both systems provide diagnostic codes for autism spectrum disorder (ASD), the ICD-11 is a globally recognised classification system used by health professionals for a wide range of conditions, while the DSM-5 is specifically used in the United States for psychiatric diagnoses. Understanding the distinctions between these two coding systems can help clarify how autism is diagnosed and classified in different contexts.

Key Differences Between ICD-11 and DSM-5 Autism Codes

Here’s how the ICD-11 vs DSM-5 autism codes differ:

Diagnostic Codes

Both ICD-11 and DSM-5 assign specific codes to autism, but the ICD-11 autism code is part of an international standard, making it more widely used for global healthcare reporting and insurance purposes. The DSM-5 autism code is more focused on the clinical setting in the US and offers more detailed categories for autism, such as level 1, level 2, and level 3 autism based on severity.

DSM-5 Comparison

One major difference is that the DSM-5 includes a more detailed description of the severity levels within the autism spectrum, whereas the ICD-11 does not distinguish between different severity levels in the same way. Instead, the ICD-11 focuses on autism spectrum disorder as a whole, considering the level of support needed as part of the diagnostic process but without assigning specific severity codes.

Autism Classification

The ICD-11 reflects a broader approach to classification, grouping autism spectrum disorder under a category of neurodevelopmental disorders, while the DSM-5 includes autism as a single disorder, with the possibility of categorising it into specific levels of severity based on social communication and repetitive behaviour traits.

In summary, the ICD-11 vs DSM-5 autism codes are both essential for diagnosing autism, but the systems vary slightly in their approach to classification and the detail they offer. Visit providers like Autism Detect, who offer tailored consultations and expert guidance.

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to Autism Diagnostic Criteria (DSM-5, ICD-11).

Lucia Alvarez, MSc

Author

Lucia Alvarez is a clinical psychologist with a Master’s in Clinical Psychology and extensive experience providing evidence-based therapy and psychological assessment to children, adolescents, and adults. Skilled in CBT, DBT, and other therapeutic interventions, she has worked in hospital, community, and residential care settings. Her expertise includes grief counseling, anxiety management, and resilience-building, with a strong focus on creating safe, supportive environments to improve 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 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.