ABA vs ESDM: Understanding the Early Start Denver Model

9 min read · Updated June 2026 · Local ABA Therapy editorial team

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In short: ABA and ESDM are both evidence-based therapies for autism, but they differ in focus and age range. ESDM is a play-based, developmental intervention for toddlers (12-48 months) that blends ABA principles with relationship-building. ABA is broader, often more structured, and effective across all ages. Choosing between them depends on your child's age, needs, and goals. Both are often covered by insurance and Medicaid.

Key takeaways

  • ESDM is designed specifically for toddlers (12-48 months) and uses play and natural interactions to teach skills.
  • ABA is a broader science of behavior that can be applied to any age, often with more structured, table-based sessions.
  • Both ESDM and ABA are evidence-based and covered by most insurance plans, including Medicaid.
  • ESDM focuses on developmental milestones (communication, social skills) while ABA targets specific behaviors and skill deficits.

What Are ABA and ESDM?

Applied Behavior Analysis (ABA) and the Early Start Denver Model (ESDM) are two of the most widely used therapies for children with autism spectrum disorder (ASD). While both are grounded in science and aim to improve outcomes, they take different paths to get there. Understanding these differences helps families make informed choices when seeking support.

Applied Behavior Analysis (ABA) Overview

ABA is a flexible, evidence-based therapy that applies principles of learning and behavior to teach new skills and reduce challenging behaviors. It can be delivered one-on-one, in groups, or in natural settings. ABA is often associated with discrete trial training (DTT), but modern ABA includes natural environment teaching (NET), pivotal response training (PRT), and functional communication training (FCT). ABA is effective for individuals from early childhood through adulthood.

Early Start Denver Model (ESDM) Overview

ESDM is a specific, manualized intervention for children aged 12 to 48 months. Developed by Dr. Sally Rogers and Dr. Geraldine Dawson, it blends ABA techniques with developmental and relationship-based approaches. Sessions are play-based, child-led, and embedded in everyday activities. ESDM targets core deficits in social communication, imitation, and play skills, with an emphasis on building positive relationships.

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Key Differences Between ABA and ESDM

Age and Developmental Focus

ESDM is designed exclusively for toddlers and preschoolers (12-48 months). It assumes that early intervention can alter developmental trajectories. ABA, in contrast, is age-agnostic and can be adapted for children, teens, and adults. ESDM's developmental framework means it prioritizes milestones like joint attention, imitation, and emotional regulation, while ABA can target any skill, from toileting to vocational training.

Structure and Delivery

ESDM sessions are typically 2-3 hours long, delivered in natural settings (home or daycare) by trained therapists and parents. The child's interests drive activities, and the therapist follows their lead to teach skills. ABA can be more structured, with discrete trials at a table, but also includes naturalistic methods. ABA hours often range from 10 to 40 hours per week depending on need.

Parent Involvement

Both approaches value parent training, but ESDM explicitly teaches parents to use strategies during daily routines (meals, bath, play). ABA also includes parent training, but the intensity varies. In ESDM, parents are seen as co-therapists, while in ABA, parents may focus on implementing behavior plans.

What to Expect in ESDM Therapy

An ESDM session might look like this: a therapist sits on the floor with your child, following their interest in a toy car. The therapist models words like 'go' and 'stop,' encourages the child to imitate pushing the car, and celebrates every attempt. The goal is to build a joyful interaction that teaches communication, social engagement, and cognitive skills. Progress is tracked using the ESDM Curriculum Checklist, which breaks down skills into small steps.

ESDM is typically delivered for 15-25 hours per week, often with parent coaching sessions. It is most effective when started early and delivered consistently.

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What to Expect in ABA Therapy

ABA sessions vary widely. A child might work one-on-one with a registered behavior technician (RBT) under the supervision of a board-certified behavior analyst (BCBA). Sessions may include structured teaching at a table, followed by play-based activities to generalize skills. Targets could include requesting items, following instructions, or reducing tantrums. Data is collected on every target, and the BCBA adjusts the plan monthly.

ABA is often recommended for 20-40 hours per week for intensive early intervention, but lower hours are also effective for specific goals. Many providers now use naturalistic teaching to make sessions more engaging.

Costs and Insurance Coverage

Both ABA and ESDM are typically covered by private insurance, Medicaid, and state-funded early intervention programs. In the United States, most states have mandates requiring insurance to cover autism therapies. For example, California's Medi-Cal and New York's Medicaid cover both ABA and ESDM when deemed medically necessary. Costs without insurance can range from $50 to $150 per hour for ABA and similar for ESDM. Many families pay nothing out-of-pocket after meeting deductibles.

Our free matching service can help you find providers who accept your insurance plan, including Medicaid. Simply share your location and coverage, and we'll connect you with vetted, BCBA-led teams.

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How to Choose Between ABA and ESDM

Consider your child's age first. If your child is under 4, ESDM might be a strong fit due to its developmental focus. If your child is older or has specific behavioral challenges, ABA may be more appropriate. Also, think about your family's values: do you prefer a child-led, play-based approach (ESDM) or a more structured, data-driven one (ABA)? Many providers offer a hybrid model that blends both.

Ask potential providers: 'Do you have experience with ESDM?' and 'How do you integrate naturalistic teaching into your ABA program?' A good provider will tailor the approach to your child's unique profile.

Common Mistakes to Avoid

  • Choosing based on popularity: Just because a therapy is common doesn't mean it's right for your child. Evaluate both options with a professional.
  • Ignoring the child's age: ESDM is only for toddlers. Trying to use it with a 6-year-old would be inappropriate.
  • Overlooking parent training: Both therapies rely on parent involvement. Ensure you have time and energy to participate.
  • Assuming one size fits all: Many children benefit from a combination of approaches. Don't be afraid to ask for a blended plan.
  • Not verifying insurance coverage: Always confirm with your provider and insurance company before starting therapy.

Getting Started with the Right Provider

Finding a qualified provider who offers ESDM or ABA can feel overwhelming. That's where Local ABA Therapy comes in. We are a free matching service that connects families with vetted, BCBA-led providers in your area. Whether you're looking for an ESDM specialist or a comprehensive ABA program, we can help you find options that fit your child's needs and your insurance plan. Start by filling out our quick form, and we'll do the rest.

About this guide. Written and reviewed by the Local ABA Therapy editorial team. This article is general educational information, not medical advice - please consult a qualified professional such as a BCBA or your pediatrician about your child's needs. Last updated June 2026.

Frequently asked questions

What is the main difference between ABA and ESDM?

The main difference is that ESDM is a specific, manualized program for toddlers (12-48 months) that uses play and developmental principles, while ABA is a broader science of behavior that can be applied to any age and often includes more structured teaching methods.

Is ESDM more effective than ABA?

Both are evidence-based and effective for different purposes. ESDM is particularly strong for building foundational social-communication skills in very young children, while ABA is highly effective for reducing challenging behaviors and teaching a wide range of skills across all ages. The best choice depends on your child's individual needs.

Does insurance cover ESDM therapy?

Yes, many insurance plans, including Medicaid, cover ESDM when it is prescribed as a medically necessary autism therapy. Coverage varies by state and plan, so it's important to verify with your provider. Our free matching service can help you find providers who accept your insurance.

Can ABA and ESDM be used together?

Absolutely. Many providers integrate strategies from both approaches. For example, a therapist might use ABA techniques like reinforcement within a play-based ESDM session. This blended approach can be very effective for young children.

What age is ESDM appropriate for?

ESDM is designed for children between 12 and 48 months (1 to 4 years old). It is most effective when started as early as possible, ideally before age 2. For older children, ABA or other therapies may be more suitable.

How do I find a provider who offers ESDM or ABA?

You can start by asking your pediatrician or local early intervention program. For a personalized list of vetted, BCBA-led providers in your area who offer ESDM or ABA, use our free matching service at Local ABA Therapy. We'll help you find options that fit your child's needs and insurance.

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