ICD-10 Code F84.0 – Autistic Disorder (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F84.0 – Autistic disorder
What it is
F84.0 identifies autistic disorder, a neurodevelopmental condition marked by persistent differences in social communication and restricted, repetitive behavior. Use this code when the record specifically documents autistic disorder.
Clinical signs
Typical findings include impaired social interaction, delayed or unusual communication, and repetitive interests or behaviors. Clinical features vary; refer to documentation for the specific presentation and severity.
When to use this code
Use F84.0 when the clinician clearly diagnoses autistic disorder in the assessment, problem list, or discharge summary. It is also appropriate when the chart documents autism with no more specific autism spectrum disorder code given. Confirm that the diagnosis is current and supported in the record.
Do not use for
Do not use this code for isolated speech delay, learning problems, or behavior concerns without a documented autism diagnosis. Check documentation if the record instead specifies another autism spectrum condition or a different developmental disorder.
Coding tip
Code only when the provider explicitly documents autistic disorder; if wording is unclear, query for clarification.