When Should My Child Be Evaluated for Autism? A Parent’s Guide

Autism Evaluation

Few questions weigh on a parent's mind more than this one: is my child's development on track, or is it time to look deeper? If you have noticed differences in how your child communicates, plays, or responds to the world, an autism evaluation can give you clear answers and a path forward. Here is what parents on Long Island should know about timing, the process, and who to trust with the evaluation.

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This article is educational and is not a substitute for care from a licensed clinician.

Early Signs Are Often Visible Before Age Two

Autism spectrum disorder affects how a child communicates and interacts with others, along with how they experience the world around them. According to the American Academy of Pediatrics, pediatricians screen for developmental concerns at well-child visits, with autism-specific screening typically recommended at 18 and 24 months. The CDC notes that an experienced professional can often make a reliable diagnosis by age two, though many children are identified later when social demands increase at school.

Signs that may warrant a conversation with your pediatrician include:

• Limited or no babbling, pointing, or other gestures by 12 months
• No single words by 16 months, or no two-word phrases by 24 months
• Loss of language or social skills at any age
• Limited eye contact, difficulty responding to their name, or little interest in other children
• Repetitive movements or speech, intense interests, or strong reactions to changes in routine

Every child develops at their own pace, and one sign alone does not mean a child has autism. But a pattern of these signs is reason to seek a professional evaluation rather than waiting to see if things resolve on their own.

Signs Can Also Emerge Later in Childhood

Autism is not always identified in toddlerhood. Some children, particularly girls and children without language delays, are not evaluated until elementary school or later. Later signs may include difficulty making or keeping friendships, taking language very literally, rigid adherence to routines, intense focus on specific topics, or sensory sensitivities that interfere with daily life.

If your child's teacher has raised concerns, or if your child is struggling socially despite doing fine academically, an evaluation is worth considering regardless of age. A diagnosis later in childhood still opens the door to supports, accommodations, and a better understanding of your child's needs.

Who Conducts an Autism Evaluation?

A comprehensive autism evaluation should be conducted by a clinician with specific training in developmental assessment. Depending on where you go, this may be a child psychiatrist, a developmental pediatrician, a child psychologist, or a multidisciplinary team. What matters most is experience: ask how many autism evaluations the clinician performs and what assessment tools they use.

A thorough evaluation typically includes:

• A detailed developmental and medical history, including parent interviews
• Direct observation of the child in structured activities
• Input from teachers or caregivers who see the child in different settings
• Screening for co-occurring conditions such as anxiety, ADHD, or language delays
• A feedback session where findings are explained in plain language, plus a written report you can share with your child's school and pediatrician

At Resilience Psychiatry, autism diagnostic evaluations are led by Dr. Jessica Carbajal Caceda, a board-certified child, adolescent, and adult psychiatrist. The evaluation integrates a widely used standardized observational assessment, the ADOS-2 (Autism Diagnostic Observation Schedule, Second Edition), with a full psychiatric evaluation. The ADOS-2 is a structured set of play- and conversation-based activities that lets the clinician observe social communication and behavior directly, rather than relying on questionnaires alone. Pairing it with a complete psychiatric assessment means families get a full diagnostic picture, including any co-occurring conditions, and a practical plan for what comes next.

You can learn more about the evaluation process on our autism spectrum disorder page.

What to Bring to the Evaluation

Preparation helps the clinician see the full picture. Bring any prior evaluations (early intervention, speech or occupational therapy reports), school records or teacher comments, a list of current medications, and notes on your child's developmental milestones. Many parents find it helpful to jot down specific examples of behaviors that concern them, including when they happen and what seems to trigger them.

If your child has an IEP or 504 plan, bring that too. And if your family prefers to communicate in Spanish, let the practice know in advance; our team provides care in both English and Spanish.

For more on choosing the right provider, see our guide to how to choose the right psychiatrist and what to expect from a psychiatric evaluation.

What Happens After the Evaluation

An evaluation ends with answers, not just a label. You should receive a clear explanation of the findings, a written report, and guidance on next steps, which may include therapy referrals, school accommodation recommendations, and ongoing psychiatric follow-up. If your child does not meet criteria for autism, the evaluation should still identify what is going on and what supports would help.

Early support makes a real difference, which is why acting on your concerns matters more than getting the timing perfect. If you are unsure, a consultation with a child psychiatrist is a reasonable first step.

To learn about our broader approach to children's mental health, visit our child psychiatry page.

Frequently Asked Questions