After a positive screen on the M-CHAT, which step is recommended?

• A. Administer a comprehensive diagnostic test in the clinic.
• B. Consult a psychologist to begin early intervention strategies.
• C. Refer the child to a specialist for further evaluation.
• D. Tell the parent that the result confirms autism.

Answer: (D)

A positive screen on the M-CHAT signals that there may be autism risk, but it does not diagnose autism. The next step is to refer for a comprehensive diagnostic evaluation by a developmental specialist or a multidisciplinary team. This evaluation combines a detailed history, direct observation, and standardized assessments (for example, instruments like ADOS-2 and ADI-R) plus a review of medical, hearing, and vision status to rule out other causes and determine whether autism is present and what supports are needed. Early identification through a thorough evaluation allows timely access to appropriate interventions if a diagnosis is made.