Who diagnoses oppositional defiant disorder (ODD)?

ODD is usually diagnosed by qualified health professionals such as:

• Child psychologists.
• Paediatricians with experience in behavioural health.
• Child psychiatrists.
• NDIS-approved behavioural therapists (as part of a multidisciplinary team).

Teachers and parents often notice symptoms first, but a formal diagnosis must come from a professional with training in child behaviour and mental health. In Australia, diagnosis often leads to support under the NDIS if the child meets functional impairment criteria.

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