Child development

How Early Intervention Works in Illinois

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Illinois is unusual among states for charging a monthly, income-scaled Family Participation Fee for ongoing therapy, billed through a dedicated Central Billing Office — a formal cost-sharing structure most Part C programs don't use. It's also mid-transition: as of July 1, 2026, a brand-new department, not the old Department of Human Services, is the legal lead agency.

Last updated: July 2026

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Who qualifies for Illinois Early Intervention?

A child under 3 qualifies for Illinois Early Intervention with a 30 percent delay in at least one of five developmental areas — cognitive, physical, communication, social-emotional, or adaptive — a diagnosed physical or mental condition known to cause developmental delay or disability, or documented risk of substantial delay, with eligibility decided by a multidisciplinary evaluation team.

That third path, at-risk eligibility, means a child doesn't have to already show a measurable delay to qualify in Illinois; certain risk factors are enough on their own. None of the three paths requires an autism diagnosis. A child can qualify on a communication or social-emotional delay well before a separate autism evaluation is scheduled, since the two processes run independently of each other 1.

Does my child need a doctor's referral first?

No. A parent, caregiver, childcare provider, or physician can refer a child directly, and a parent's own concern is enough to request a free evaluation without any prior testing, diagnosis, or paperwork completed in advance of that first call 2.

No diagnosis and no pediatrician's note are required to start. That distinction matters for families concerned about autism specifically — a developmental-behavioral pediatrician appointment can take months to get in Illinois, and a family doesn't have to wait for that appointment before making an Early Intervention referral; the two can move forward at the same time. A referral can be made to the local Child and Family Connections (CFC) office serving the family's area, and CFC staff can help identify which office that is.

What happens after referral, and how long does evaluation take?

Federal regulations require the evaluation and the family's first Individualized Family Service Plan (IFSP) meeting within 45 days of referral, and Illinois applies that same timeline statewide regardless of which CFC office handles the intake or how the family first made contact 3.

The IFSP names the specific services a child will receive — physical, occupational, or speech therapy, developmental instruction — how often, and where, usually the family's home or another place the child spends time regularly. A service coordinator helps the family through the process and remains their point of contact once services start. Service coordination, evaluations, assessments, and IFSP development itself are always free in Illinois, regardless of what happens with the direct-service fee described below.

What does Illinois Early Intervention actually cost a family?

Illinois is one of the few states that charges an ongoing, income-scaled Family Participation Fee for direct services like physical, developmental, or speech therapy, billed monthly through a dedicated Early Intervention Central Billing Office (CBO). Evaluation, assessment, service coordination, and building the IFSP are never subject to this fee, no matter a family's income, because those are considered the entry point into the system rather than ongoing treatment.

Families with income at or below 318 percent of the Federal Poverty Level pay no Family Participation Fee at all. Above that line, the fee scales with family size and income, and a family assessed a fee gets a monthly invoice mailed by the CBO. That's a more formal, ongoing cost-sharing structure than several other states use — some charge nothing at all, others use a looser sliding scale for a smaller slice of services — and it's worth a family confirming their own fee status directly with their service coordinator, since it depends on income documentation the CBO doesn't have automatically and won't apply retroactively once services have already started.

Why did the name of the state agency running this just change?

For decades, the Illinois Department of Human Services (IDHS) was the legal lead agency for Early Intervention. That changed on July 1, 2026: the Illinois Department of Early Childhood (IDEC), created by state law in 2024, became the new lead agency for Early Intervention along with Child Care Assistance, home visiting, and other early-childhood programs that used to be split across several departments and required families to navigate more than one bureaucracy for related needs.

The state has said eligibility criteria and services aren't changing because of the move — it's a change in which department is legally responsible, not a change in who qualifies or what a family receives. A family with an open case, or a family referred in the weeks around the transition, may still see references to IDHS in older materials or forms; both names point to the same Early Intervention system during this changeover.

What happens at age 3, and what if the family moves before then?

Illinois Early Intervention ends at the third birthday. A child who continues to need special education support moves to Part B of IDEA — but unlike some states, Illinois hands that transition to a genuinely separate agency, the Illinois State Board of Education (ISBE), which oversees Part B through local school districts rather than through IDEC, so the family is working with a different agency on each side of the birthday 4. Illinois requires transition planning to start between nine months and 90 days before the third birthday, and a report on the child's IFSP is sent to ISBE at 25 months so the local school district has time to plan and avoid a gap in services.

This handoff — sometimes summarized as ifsp vs iep — replaces the family-routine-centered IFSP with an Individualized Education Program (IEP) built around specific classroom goals. A family who moves out of Illinois before age 3 does not carry Illinois eligibility with them: early intervention in Utah, early intervention in Vermont, early intervention in Virginia, early intervention in Washington, and early intervention in Alaska each run independent intake under the same federal Part C floor, so a prompt new referral in the destination state is what actually protects continuity of services.

Common questions

No. Eligibility is based on a measured developmental delay, a diagnosed condition, or documented risk of substantial delay — not on an autism diagnosis specifically. Many children enrolled in Illinois Early Intervention are never evaluated for autism, and a family pursuing a separate autism evaluation can start Early Intervention services while that process is still underway.

It depends on income. Families at or below 318 percent of the Federal Poverty Level pay no Family Participation Fee at all. Above that line, direct services like physical or speech therapy are billed on a sliding scale by the Central Billing Office, while evaluation, assessment, and service coordination remain free regardless of income.

As of July 1, 2026, no — the Illinois Department of Early Childhood (IDEC), a newly created state agency, is now the legal lead agency for Early Intervention, taking that role over from the Department of Human Services. The state has said eligibility and services are not changing because of the transition.

Federal rules require the evaluation and the first IFSP meeting within 45 days of referral, applied the same way statewide. Actual scheduling can vary by local Child and Family Connections office, but 45 days is the outer limit every office has to meet.

Illinois Early Intervention ends at the third birthday. A child found eligible for continued special education moves to Part B of IDEA through the Illinois State Board of Education and the local school district, under an IEP rather than the IFSP. Transition planning is required to start between nine months and 90 days before the birthday.

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When to ask for an evaluation without waiting

  • —Loss of words, babbling, or social engagement the child previously had, at any age
  • —No response to their name by 12 months, combined with no pointing, reaching, or waving
  • —No single words by 16 months, or no two-word phrases by 24 months

This article explains Illinois's public early-intervention system. It does not evaluate a specific child, and it is not a diagnosis. Eligibility and fee status are decided by the evaluation team and the Central Billing Office, not by this page.

References

  1. 1.Centers for Disease Control and Prevention (2024). Accessing Services for Autism Spectrum Disorder. CDC — Autism Spectrum Disorder (ASD). linkFamilies can access Part C early intervention before a formal autism diagnosis is complete.
  2. 2.Center for Parent Information and Resources (OSEP-funded) (2023). Part C of IDEA: Early Intervention for Babies and Toddlers. Center for Parent Information and Resources. link ✓Parents can refer their own child directly to Part C, without needing a physician's referral.
  3. 3.U.S. Department of Education, Office of Special Education Programs (2024). Part 303 (Part C) — Early Intervention Program For Infants And Toddlers With Disabilities. IDEA — sites.ed.gov/idea. link ✓Federal Part C regulations require evaluation and the initial IFSP meeting within 45 days of referral.
  4. 4.U.S. Department of Education, Office of Special Education Programs (2024). About IDEA. IDEA — sites.ed.gov/idea. link ✓Describes Part B of IDEA, including the IEP and the FAPE guarantee that begins at age 3.

4 sources, numbered by first appearance. General health information, not medical advice. AI-assisted editorial content — citations link their sources. Editorial policy

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