Illinois ABA Medicaid Fee Schedule: What Families and Providers Need to Know

What Is the Illinois ABA Medicaid Fee Schedule?

The Illinois ABA Medicaid fee schedule is a state-published document that lists the maximum reimbursement rates for specific applied behavior analysis (ABA) services provided under the Illinois Medicaid program. These rates apply to children with an autism diagnosis who are enrolled in Medicaid (also known as Medical Assistance) or a Medicaid managed care plan. The schedule is created by the Illinois Department of Healthcare and Family Services (HFS) and is updated periodically to reflect changes in healthcare costs and policy.

For families, understanding this fee schedule is important because it determines how much providers are paid for each type of service. It does not directly affect what families pay-since Medicaid covers ABA therapy with no copays or deductibles for eligible children-but it influences provider availability and the sustainability of services.

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How the Fee Schedule Works

Procedure Codes and Reimbursement Rates

The fee schedule uses standard CPT (Current Procedural Terminology) codes to categorize different ABA services. Common codes include:

• 97153 - Adaptive behavior treatment by protocol, direct one-on-one with the patient (typically delivered by a registered behavior technician or RBT).
• 97155 - Adaptive behavior treatment with protocol modification (supervision by a BCBA or BCBA-D).
• 97156 - Family adaptive behavior treatment guidance (parent training).
• 97157 - Multiple-family group adaptive behavior treatment guidance.
• 0362T - Behavior identification assessment (initial assessment).

Each code has a specific reimbursement rate. For example, as of the most recent update, 97153 may be reimbursed at around $20-$30 per 15-minute unit, while 97155 might be higher, reflecting the BCBA's expertise. These rates are subject to change, so providers and families should always verify current rates on the HFS website or through their managed care plan.

Unit Billing and Session Limits

Services are billed in 15-minute units. A typical one-hour direct therapy session would use 4 units of code 97153. There is no hard cap on the number of units a child can receive per day or month, but providers must submit a treatment plan and obtain prior authorization. The fee schedule does not set a maximum number of hours; instead, it ensures that each unit of service is reimbursed at a consistent rate.

Who Is Eligible for ABA Therapy Under Illinois Medicaid?

Children under age 21 who have a medical diagnosis of autism spectrum disorder (ASD) are eligible for ABA therapy through Illinois Medicaid. The diagnosis must be made by a qualified professional (e.g., a developmental pediatrician, child psychiatrist, or psychologist). Once diagnosed, the family can request a referral from their primary care provider or contact their managed care plan to begin the authorization process.

ABA services are covered under the Early and Periodic Screening, Diagnostic and Treatment (EPSDT) benefit, which mandates that states provide all medically necessary services for children. This includes ABA therapy, which is considered a medically necessary treatment for autism.

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How Providers Get Paid

Enrollment and Credentialing

To bill Illinois Medicaid for ABA services, providers must be enrolled as a Medicaid provider. This involves completing an application through the HFS Provider Enrollment portal, submitting proof of licensure (BCBA or BCBA-D), and meeting any additional requirements set by the managed care plan. Many providers also need to be paneled with specific managed care organizations (MCOs) like Blue Cross Community Health Plans, Meridian, or IlliniCare.

Prior Authorization

Before starting ABA therapy, providers must obtain prior authorization from the child's Medicaid plan. This requires a detailed treatment plan that includes the child's diagnosis, proposed goals, number of hours per week, and expected duration of services. The fee schedule is used to calculate the cost of the authorized services, but the authorization process focuses on medical necessity rather than cost.

Once authorized, providers submit claims with the appropriate procedure codes and units. Reimbursement is typically processed within 30-60 days, though delays can occur if claims are denied or require additional documentation.

Differences Between Fee-for-Service and Managed Care

Illinois Medicaid operates under two main models: fee-for-service (FFS) and managed care. Under FFS, providers bill the state directly and are paid according to the fee schedule. Under managed care, the child is enrolled in a private insurance plan (MCO) that contracts with the state. These plans may negotiate slightly different rates with providers, but they must cover all medically necessary ABA services and cannot charge families more than the Medicaid fee schedule allows.

For families, the main difference is that managed care plans may have their own provider networks and prior authorization requirements. However, the fee schedule still serves as a baseline for reimbursement, and families should not experience any out-of-pocket costs.

Practical Tips for Families

• Verify your child's eligibility - Ensure your child is enrolled in Illinois Medicaid or a qualifying managed care plan. If you're unsure, contact the Illinois Department of Human Services (DHS) or your local county office.
• Ask about prior authorization - Before starting ABA, confirm that the provider has obtained prior authorization from your plan. This prevents unexpected denials.
• Understand the fee schedule is not a limit - The fee schedule sets reimbursement rates, not a cap on hours. Your child's treatment plan should be based on medical necessity, not the fee schedule.
• Work with a vetted provider - Use a free matching service like Get Started with ABA to find a BCBA-led provider who accepts Medicaid and understands the fee schedule. This can save time and reduce stress.
• Keep records - Save copies of your child's diagnosis, treatment plan, and authorization letters. These documents are helpful if you need to appeal a denial or change providers.

Common Mistakes to Avoid

• Assuming all providers accept Medicaid - Not all ABA providers are enrolled as Medicaid providers. Always confirm before starting services.
• Ignoring managed care plan rules - If your child is in a managed care plan, follow their specific authorization and referral processes. Failure to do so could result in denied claims.
• Thinking the fee schedule determines your child's hours - The fee schedule only sets payment rates. Your child's hours should be determined by a BCBA based on their individual needs and goals.
• Not updating your insurance information - If your child's Medicaid plan changes (e.g., from FFS to an MCO), notify your provider immediately to avoid billing issues.

How Get Started with ABA Can Help

Navigating the Illinois ABA Medicaid fee schedule and finding a qualified provider can feel overwhelming. Get Started with ABA is a free service that connects families with vetted, BCBA-led ABA providers in their area. We help you understand your insurance coverage, including Medicaid, and match you with providers who accept your plan. Our goal is to make the process smoother so you can focus on your child's progress.

Whether you're new to ABA or looking to switch providers, we're here to support you every step of the way. Start your journey today by visiting our website and completing a simple intake form.