Autism is typically diagnosed by a multidisciplinary team of qualified professionals rather than a single individual. This team of experts generally includes:

• Developmental Pediatricians: They specialize in child growth, assess developmental milestones, and rule out other medical conditions.
• Child Psychologists: These professionals evaluate behavioral symptoms and social interactions, often using standardized tools like the ADOS-2.
• Neurologists: They focus on brain-related factors and check for neurological comorbidities such as seizures.

In some cases, the diagnostic team may also include child psychiatrists, speech-language pathologists, and occupational therapists. These professionals use criteria from the DSM-5 or ICD-11 to identify persistent challenges in social communication and repetitive behaviors. Because there is no single medical test for autism, these specialists rely on a combination of direct behavioral observations, developmental history, and parental interviews to reach a formal identification.