Autism ICD-10 Code: F84.0, F84.5, ICD-11 6A02 and DSM-5 Explained
Published November 2, 2026 · Last updated November 2, 2026
Your child's report or an insurance form may show a code such as F84.0, and you may wonder what it means. This guide explains the autism codes in plain words: what DSM-5, ICD-10 and ICD-11 are, where you will see them, and what to check so paperwork does not hold up services.
In the US, autism is usually recorded with the ICD-10-CM code F84.0, which covers autism spectrum disorder. The older code F84.5 means Asperger's syndrome. ICD-11 uses one code, 6A02, with specifiers for intellectual functioning and language. A code names the diagnosis for billing and records. It does not describe severity.
- F84.0: US ICD-10-CM code for autistic disorder, which includes autism spectrum disorder.
- F84.5: Older code for Asperger's syndrome.
- 6A02: ICD-11 code for autism spectrum disorder, with specifiers.
- Remember: A code names the diagnosis. It does not describe severity.
What Are Autism Diagnosis Codes?
An autism diagnosis code is a short combination of letters and numbers that stands for a diagnosis. Clinicians write it on reports, referrals and insurance forms so that everyone uses the same language. You may see codes like F84.0 or 6A02 and wonder what they mean. They are not a different diagnosis from the one your clinician gave you. They are the label used for billing, records and statistics.
Codes come from different systems that are updated over time, so what you see can vary by country and by year. Always check your own paperwork and ask your clinician if something does not match.
DSM-5: The Diagnosis Itself
The DSM-5 is the manual many clinicians use to diagnose autism. It uses the single name autism spectrum disorder (ASD) and two core areas: persistent differences in social communication and interaction, and restricted, repetitive patterns of behavior, interests or activities. It describes three levels of support needed: level 1 (requiring support), level 2 (requiring substantial support) and level 3 (requiring very substantial support). See autism levels explained and our level 1 guide.
ICD-10 and ICD-10-CM: F84.0 and F84.5
ICD is the International Classification of Diseases. In the United States, the ICD-10-CM version is used for billing and records. The main autism code is F84.0, Autistic disorder, which also lists autism spectrum disorder as an inclusion term. It falls under the group F84, pervasive developmental disorders. A note on the F84 group says to code any associated medical condition and intellectual disability too.
F84.5 is the code for Asperger's syndrome. In ICD-10-CM, Asperger's syndrome is listed as an exclusion for F84.0, meaning the two are not coded together. Because DSM-5 no longer has Asperger's as a separate diagnosis, newer diagnoses are generally recorded as autism spectrum disorder. See our guide to Asperger's syndrome today.
| Code | Name | What parents should know |
|---|---|---|
| F84.0 | Autistic disorder (includes autism spectrum disorder) | The most common code on US reports, referrals and claims |
| F84.5 | Asperger's syndrome | May appear on older records. Newer diagnoses are usually ASD |
| F84.8, F84.9 | Other or unspecified pervasive developmental disorder | May appear when a diagnosis is not fully specified |
| 6A02 | ICD-11 autism spectrum disorder | Used where ICD-11 has been adopted. One code with specifiers |
ICD-11: One Code With Specifiers
ICD-11, the newer version published by the World Health Organization, uses a single code, 6A02, autism spectrum disorder. Instead of separate labels, it adds specifiers describing intellectual functioning and language ability. According to a coding guide, a 6A02 diagnosis with intact intellectual and language functioning corresponds to what ICD-10 called Asperger's, and the rigid age-of-onset rule used for F84.0 was dropped. Check the official WHO ICD-11 browser for the full list of subcodes, because adoption and local use differ by country.
Why the Code Matters to You
For most families the code matters in three practical ways:
| Where | Why the code matters | What to do |
|---|---|---|
| Insurance claims and prior authorization | The code on the claim must match what the plan covers. A mismatch or a missing code can cause a denial | Ask your clinician which code is on the referral and check it against your plan's autism benefits |
| Therapy referrals | Therapists often need a diagnosis code to start services | Ask for a copy of the report and the diagnosis code in writing |
| School and benefits paperwork | Some forms ask for a diagnosis and code | Keep digital and paper copies of the evaluation |
| Older records with different codes | Older reports may show F84.5 or other codes | Ask the clinician whether an updated report would help, especially for new services |
Practical Tips for Parents
- Ask for the full report. A code alone does not explain your child's needs. The report should describe strengths, support needs and recommendations.
- Check the spelling and the code. Typos in a name or date of birth cause as many problems as a wrong code.
- Do not self-assign a code. Only a clinician can diagnose, and the code must match their diagnosis.
- Keep a folder. Put every evaluation, report and referral in one place, with dates.
- Ask before changing anything. If a code needs to be corrected or updated, ask the clinician's office to do it.
If you live in the US, see our guides to autism insurance and ABA coverage and the evaluation process.
Frequently Asked Questions
What is the ICD-10 code for autism?
In the US, the main code is F84.0, Autistic disorder, which also covers autism spectrum disorder. F84.5 is the code for Asperger's syndrome. Codes can differ by country and are updated over time.
What is the ICD-11 code for autism?
6A02, autism spectrum disorder. It is one code with specifiers for intellectual functioning and language ability. Check the WHO ICD-11 browser for the full list.
Is the DSM-5 code for autism the same as ICD-10?
Clinicians diagnose using the DSM-5 name, autism spectrum disorder, and a matching ICD-10-CM code is recorded for billing. For autism spectrum disorder this is usually F84.0.
Why does my child's report say F84.5?
F84.5 is the older code for Asperger's syndrome. It may appear on older records. Newer diagnoses are usually recorded as autism spectrum disorder. Ask your clinician if an updated report would help.
Do I need a code to get insurance coverage for therapy?
Usually yes. Insurers generally need a diagnosis code on claims and prior authorization requests. Ask your clinician which code is on the referral and check your plan's autism benefits.
Does the code tell me how severe my child's autism is?
No. A code names the diagnosis, not the severity. The DSM-5 levels (1, 2, 3) and the clinician's report describe support needs.
Can a code be changed or updated?
Only the clinician who made the diagnosis, or a new evaluation, can change it. Ask their office if you believe there is an error.
Are autism codes the same in every country?
No. Different countries use different versions of the ICD and different billing rules. Check which version applies where you live.
Sources
- AAPC: ICD-10-CM Code F84.0, Autistic disorder
- Pabau: ICD-11 6A02 Autism Spectrum Disorder coding guide
- Interagency Autism Coordinating Committee: DSM-5 Diagnostic Criteria
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