Getting an Autism Diagnosis in Illinois: Where to Start

If you are reading this because something about your child's development has been sitting with you, take the pressure off for a moment. There is a well-worn path here, thousands of Illinois families walk it every year, and none of the steps have to happen this week.

Start with the pediatrician

For most families the first step is simply telling the pediatrician what you have noticed. Write it down beforehand in plain language, with examples rather than labels: he does not turn when I say his name, she lines up her cars for an hour and gets very upset if I move one, he had words at eighteen months and uses fewer now. Specific examples are far more useful to a clinician than a general worry, and they are easier to say out loud when the appointment is short.

Bring anything a daycare teacher, preschool, or relative has mentioned as well. You do not need to have a theory. Describing what you see is enough, and it is the pediatrician's job to take it from there.

What developmental screening is

Developmental screening is a short, structured check on whether a child is doing the things most children do at a given age. It is usually a questionnaire the parent fills in, sometimes with brief observation, and it takes a few minutes. The American Academy of Pediatrics recommends autism-specific screening at well-child visits in the second year, alongside general developmental screening, so many families have already been screened without registering it as such.

A screening is not a diagnosis and it does not try to be. It is a sorting step: it flags that a fuller look is warranted. A screen that raises a flag does not mean your child has autism, and a screen that does not is not a guarantee either, which is why an ongoing concern from a parent is worth raising again even after a reassuring result.

Who can diagnose autism

An autism diagnosis is generally made by a developmental-behavioral pediatrician, a child psychologist or neuropsychologist, a pediatric neurologist, or a multidisciplinary team that combines several of those perspectives, often with a speech-language pathologist and an occupational therapist contributing. Some psychiatrists diagnose as well.

Be prepared for the wait. Evaluation appointments at hospital-based and university clinics in the Chicago area are frequently booked months out, and that is a capacity problem rather than a reflection of how urgent anyone considers your child. Two things help: ask to be placed on cancellation lists, and put your name down at more than one place at the same time. You can cancel the later appointment once you have an earlier one.

Two public routes in Illinois, depending on age

This is the part most parents do not know exists, and it is the most practically useful thing on this page. Illinois has two separate public systems, and which one applies depends entirely on your child's age.

Under three: Early Intervention. The Illinois Department of Human Services runs the state's Early Intervention program for children from birth to their third birthday. A family can make a referral themselves, without a doctor's order, and the program evaluates whether a child is eligible for services such as speech therapy, occupational therapy, physical therapy, and developmental therapy. Eligibility is based on developmental delay or an established condition rather than on having an autism diagnosis in hand, so you do not need to wait for a diagnostic appointment before calling. Services are coordinated through a local Child and Family Connections office. You can read the program details on the Illinois Department of Human Services Early Intervention page.

Three and over: your local school district. Once a child turns three, responsibility shifts to the public school district where you live, whether or not your child attends that district's schools and whether or not they are in school at all. Under federal special education law the district has an obligation to identify and evaluate children who may need special education services. A parent can request an evaluation in writing, and the district must respond within the timelines set out in state rules. The Illinois State Board of Education special education pages set out those procedures and parent rights.

One clarification that saves families a lot of confusion: a school district's evaluation determines eligibility for educational services and can result in an educational identification of autism. That is a different thing from a medical diagnosis, and insurance generally looks for the medical one. Pursuing both at once is common and sensible, since they serve different purposes and neither blocks the other.

What an evaluation typically involves

A diagnostic evaluation is not one test. It usually combines a detailed developmental and medical history taken from you, direct observation and structured interaction with your child, standardized measures administered by the clinician, and questionnaires completed by parents and sometimes teachers. Hearing is often checked first, because hearing loss can look like a language delay.

It may run across more than one appointment, and the way it looks can be unsettling: much of it resembles play. Afterwards there is usually a feedback session where the findings are explained, followed by a written report. Ask when you will receive the report and how many copies you can have, because you will be sending it to several places.

What happens after a diagnosis

Nothing has changed about your child. What changes is access: a diagnosis is the key that unlocks insurance-funded services, certain school supports, and specialist referrals that were previously closed.

Practically, the next steps are usually to get copies of the report, call your insurer to find out what is covered, and start looking at recommended services. There is no obligation to act immediately on every recommendation in a report. Families are allowed to take a week to absorb it, and most do.

What you can do while you wait

The months between raising a concern and getting an answer are the hardest part for most parents, and they are not wasted time. Things worth doing:

• Start a file. Every report, referral, phone call with a date and a name. You will be asked for this repeatedly.
• Keep short notes. A line a week about what you are seeing gives a clinician a far better picture than memory does at the appointment.
• Make the Early Intervention or school district referral now. Neither requires a diagnosis, and both run on their own timeline in parallel.
• Get the hearing check done. It is quick and it removes a variable.
• Ask about cancellation lists every few weeks at each clinic you are waiting on.
• Follow your child's lead in play. Time spent together, on their terms, is never the wrong thing to be doing while you wait.

One more thing, since it is easy to feel singled out at this stage. According to the CDC, about 1 in 31 children aged 8 has been identified with autism. Whatever the outcome, you are not in unusual territory and you are not the first parent on your street to be here.

Our free parent trainings over Zoom are open to any family, including families still waiting on an evaluation and families who will never be our clients. There is nothing to buy and nobody will call you afterwards. If a practical hour would help while you wait, the schedule is on our parent trainings page.