The American Academy of Pediatrics recommends screening children for autism at the 24-month well-child visit in addition to regular developmental monitoring. This type of screening can identify children with significant developmental and behavioral challenges early. In most offices, pediatricians use the M-CHAT, a questionnaire filled out by parents. If the screening test identifies a potential problem, further evaluation is needed. Screening tools do not result in diagnoses. A positive screening result should be followed by a thorough assessment done by a trained provider. The rate of success for the M-CHAT, for example, isn’t 100%, so it is used in combination with health and family history to identify children at risk. A more detailed evaluation will show whether the child needs treatment and early developmental intervention services.