When a family gets their first Explanation of Benefits after starting ABA therapy, the confusion rarely comes from the service itself. It comes from three words stacked on top of each other: copay, coinsurance, and deductible. I've sat across from parents holding that page, certain they'd been billed twice for the same session, when really they were looking at three different cost-sharing rules doing three different jobs.

The Centers for Disease Control and Prevention estimates that about 1 in 31 children in the U.S. has now been identified with autism spectrum disorder, and ABA therapy remains one of the most commonly prescribed interventions for the communication, behavior, and social differences that come with it. 

As more families start ABA therapy, more of them run into these same three unfamiliar terms on their very first bill.

Copay, coinsurance, and deductible decide what you owe for every hour of your child's ABA therapy, and they rarely work the way people expect from a routine pediatrician visit. Here's what each term controls, how they interact across a plan year, and where North Carolina and Colorado's autism insurance laws change the math.

Copay, Coinsurance, and Deductible: The Three Numbers Behind Every ABA Bill

Every plan handles cost-sharing through some combination of these three tools, and an Explanation of Benefits usually shows all three on the same page even though only one or two apply to any given session. 

Before ABA therapy even starts, most families go through a formal autism evaluation and diagnosis, which is often billed separately from the ABA assessment and ongoing therapy that follows. Once therapy begins, the same copay and coinsurance rules that apply to therapy sessions typically apply to that assessment and to parent training sessions built into your child's plan, not just one-on-one hours.

Copay

A copay is a flat dollar amount you pay for a covered visit, set by your plan regardless of the session's real cost. Some plans use a single copay for all outpatient visits, while others set a separate, often higher, copay specifically for behavioral health services, which is usually the category ABA therapy falls under.

I've had families budget for a $25 pediatrician-style copay only to find their plan charges $50 for behavioral health visits instead. It's worth checking your plan's Summary of Benefits and Coverage rather than assuming; HealthCare.gov keeps a plain-language glossary of these terms if your plan documents feel dense.

Coinsurance

Coinsurance is your share of the cost as a percentage, not a flat fee. If your plan sets 20% coinsurance and a session bills at $150, you owe $30 and the plan covers the rest.

Coinsurance almost always kicks in only after you've met your deductible for the year, which is why the same plan can feel manageable in January and noticeably more expensive by March.

Deductible

A deductible is the amount you pay out of pocket before your plan starts sharing costs at all. Most plans reset the deductible every January, and family plans often carry a higher combined deductible than an individual plan does.

Because ABA therapy is delivered in weekly hours rather than occasional visits, families frequently satisfy their deductible faster than they would with any other kind of care their child receives.

How the Three Costs Move Through a Plan Year

Copay, coinsurance, and deductible aren't three separate charges stacked on top of each other. They're three stages of the same plan year, and knowing where you sit in that sequence tells you what a given session should cost.

Before the Deductible Is Met

Until the deductible is satisfied, most plans require you to pay the full negotiated rate for each session, not a copay or coinsurance amount. This is the stage families notice most, since a $150-per-hour session at 15 hours a week adds up fast against a $2,000 or $3,000 deductible.

Between the Deductible and the Out-of-Pocket Maximum

Once the deductible is met, the plan usually shifts to coinsurance or a copay, whichever your specific plan document specifies for behavioral health. This phase continues until your total spending for the year reaches your out-of-pocket maximum.

After the Out-of-Pocket Maximum

Once a family hits the out-of-pocket maximum, the plan is required to cover 100% of remaining covered costs for the rest of the plan year. For a child in consistent ABA therapy, this is often the point where sessions stop costing the family anything at all until the calendar resets in January.

Why ABA Therapy Adds Up Differently Than an Occasional Specialist Visit

A once-a-month specialist appointment barely touches a deductible. ABA therapy, delivered at 10 to 40 hours a week depending on the treatment plan, moves through that same deductible at a completely different speed, and that changes how families should think about budgeting for it.

A family in Durham on a large employer plan and a family in Fort Collins on a Marketplace plan can end up owing very different weekly amounts even when their children are authorized for the same number of hours, simply because their plans move through the deductible and coinsurance stages differently.

Weekly Hours and the Deductible Math

A child receiving 20 hours of ABA therapy a week at a $150 hourly rate generates $3,000 in billed charges in a single week, before any insurance adjustment. Against a typical $2,000 to $3,000 deductible, some families move through their deductible within the first few weeks of the plan year rather than spreading that cost out slowly the way they might with physical therapy or dental care.

I go deeper on the full cost picture, including hourly rate ranges and what out-of-pocket spending tends to look like over a full year, in How Much Is ABA Therapy Out of Pocket? Costs Explained.

High-Deductible Health Plans and HSAs

Some families choose a high-deductible health plan to keep their monthly premium lower, which sounds appealing until ABA therapy enters the picture. A high-deductible plan paired with a Health Savings Account can still work well, since HSA funds can cover copays, coinsurance, and the deductible itself with pre-tax dollars, but it's worth running the weekly-hours math before choosing a plan during open enrollment.

State Insurance Laws Shape What You Owe

Autism insurance mandates in North Carolina and Colorado require most health plans to cover ABA therapy, but a coverage mandate and a cost-sharing structure are two different things. The mandate decides whether ABA therapy is covered at all; your plan's copay, coinsurance, and deductible rules decide what you pay for that coverage.

North Carolina's Autism Coverage Law

North Carolina's autism insurance mandate, Senate Bill 676, requires most group health plans to cover the screening, diagnosis, and treatment of autism spectrum disorder, including ABA therapy. The law caps covered benefits at a set dollar amount per year that adjusts for inflation, which means a family can reach that annual cap before reaching their plan's out-of-pocket maximum. Once a family hits that cap, they become responsible for the difference for the rest of the year.

We see this play out differently depending on where a family lives and what kind of plan they carry, whether that's a large employer plan in Raleigh or a Marketplace plan in Charlotte or Asheville.

Blue Jay ABA serves families throughout North Carolina, including Wilmington and Cary, with home-based ABA, school-based ABA therapy, and telehealth ABA therapy, and we walk through insurance verification with every family before their child's first session.

Colorado's Autism Coverage Law

Colorado's autism insurance mandate similarly requires coverage for ABA therapy, and the state's mental health parity protections, overseen by the Colorado Division of Insurance, align with federal mental health parity requirements that copay, coinsurance, deductible, and out-of-pocket maximum apply to behavioral health care no less favorably than they apply to medical or surgical care. 

In practice, that means a Colorado plan generally can't set a higher coinsurance rate for ABA therapy than it sets for physical therapy.

Families we support in Denver, Colorado Springs, and Boulder each carry different plan types, from large employer coverage to ACA Marketplace plans, but the same parity protections apply no matter where a family lives in the state.

We support families throughout Colorado with the same insurance verification process we use in North Carolina.

Medicaid and the EPSDT Benefit

For children enrolled in Medicaid, ABA therapy is typically covered through the Early and Periodic Screening, Diagnostic, and Treatment (EPSDT) benefit, which requires coverage of medically necessary treatment for children under 21 and generally comes without the deductible and coinsurance structure common in private insurance. 

Eligibility and prior authorization requirements still apply, so it's worth confirming your child's specific coverage before assuming no cost-sharing applies.

Two Plan-Year Scenarios, Worked Through

Numbers make more sense with a scenario attached to them. The two examples below are composites built from patterns I see across many families, not any single child's actual bill, but they reflect how the math typically plays out.

A Family With a High-Deductible Plan

Picture a family in Greensboro with a $3,000 deductible, 20% coinsurance after that, and a $6,000 out-of-pocket maximum. At 20 hours a week and a $150 hourly rate, this family reaches their deductible around week three of the plan year. From there, coinsurance applies at $30 per hour until their total spending hits $6,000, usually within another six to eight weeks. After that, the plan covers ABA therapy in full for the rest of the year.

A Family With a Copay-Based Plan

Now picture a family in Aurora with a plan that carries no separate ABA therapy deductible, a flat $40 behavioral health copay per session, and a $5,000 out-of-pocket maximum that includes those copays. At five sessions a week, this family pays $200 weekly until their cumulative copays reach the out-of-pocket maximum, at which point the plan covers the rest of the year in full. 

Because there's no deductible phase for ABA therapy specifically, this family's costs stay level and predictable rather than front-loaded.

Questions Worth Asking Before the First Session

The clearest way to avoid billing surprises is to ask specific questions before therapy starts, rather than working backward from a confusing Explanation of Benefits later. I usually suggest families bring these two short lists to their first call with the insurance company and with their ABA provider.

What to Ask Your Insurance Company

• Is ABA therapy billed under a medical or behavioral health benefit, and does that change my copay or coinsurance?
• How much of my deductible have I already met this year?
• Is there an annual dollar cap or visit limit specific to autism services?
• Do in-network and out-of-network rates apply differently to ABA providers?

What to Ask Your ABA Provider

• Will you verify my benefits before we start, and explain what you find in plain language?
• How do you track my deductible progress across the year?
• What happens to my costs if my authorized hours change mid-year?
• What options exist if my out-of-pocket costs run higher than expected?

Blue Jay ABA verifies insurance benefits for every family before their child's first session, walking through what the copay, coinsurance, and deductible mean for their specific plan. If you're weighing your options, reach out to our team and we'll go through your coverage together.

When the Numbers on Your Bill Do Not Match What You Expected

Even with careful planning, billing mismatches happen. A claim gets processed under the wrong benefit category, an authorization lapses, or a family moves between states mid-treatment. Knowing what's normal helps you catch what isn't.

Common Billing Mismatches

A session billed under the wrong benefit code can trigger the wrong cost-sharing category entirely, applying a general specialist copay instead of the behavioral health rate your plan specifies. Authorization for a certain number of weekly hours can also lapse or get reduced during a re-assessment, which changes what's being billed even though the copay or coinsurance rate itself stays the same.

If you're moving between providers or states, it's worth reading through what happens to an ABA authorization when a family relocates, since coverage that was already approved doesn't always transfer automatically.

If a Claim Gets Denied

A denial doesn't always mean ABA therapy isn't covered. Reviewing what counts as medical necessity for ABA authorization and understanding how to appeal a denied ABA therapy claim gives families a concrete next step rather than assuming the bill is final. North Carolina and Colorado's autism mandates both give families additional grounds to appeal a denial tied specifically to an autism diagnosis.

Knowing the difference between a copay, coinsurance, and deductible won't change what your plan charges, but it will change how prepared you feel opening that first Explanation of Benefits. The families who feel most in control aren't the ones with the simplest plans. They're the ones who asked the right questions before their child's first session and understood roughly where they sat in their plan year before a bill ever arrived.

If you're starting that process now, or trying to make sense of a bill that already doesn't add up, our team at Blue Jay ABA is glad to walk through your specific coverage with you. Contact us and we'll help you understand what your plan means for your child's ABA therapy, from the first session through the rest of the year.

Frequently Asked Questions

Is ABA therapy always subject to a deductible?

Not always. Some plans apply a straight copay to behavioral health visits with no separate deductible, while others require the full deductible to be met first. Your Summary of Benefits and Coverage specifies which applies to your plan.

Why did my ABA therapy copay change partway through the year?

This usually means you've met your deductible or reached your out-of-pocket maximum, both of which shift your cost-sharing to a different phase for the rest of the plan year.

Does North Carolina's autism insurance law remove my copay or deductible?

No. The law requires coverage for ABA therapy up to an annual cap, but your plan's copay, coinsurance, and deductible structure still applies within that coverage.

Is ABA therapy covered differently under Medicaid?

Generally, yes. Medicaid-eligible children under 21 typically access ABA therapy through the EPSDT benefit, which usually comes without the deductible and coinsurance structure common in private insurance, though prior authorization still applies.

How can I find out how much of my deductible I've already met?

Your insurance company's member portal usually shows this in real time, or you can call the number on your insurance card and ask directly. Blue Jay ABA can also verify this for you as part of our insurance verification process.

Sources:

• Centers for Medicare & Medicaid Services. (2026). Mental Health Parity and Addiction Equity Act (MHPAEA). https://www.cms.gov/marketplace/about/oversight/other-insurance-protections/mental-health-parity-and-addiction-equity-act-mhpaea
• Colorado Division of Insurance. (2026). Consumer advisory: Mental Health Awareness Month. https://doi.colorado.gov/news-releases-consumer-advisories/consumer-advisory-may-is-mental-health-awareness-month-0
• HealthCare.gov. (n.d.). Glossary of health coverage and medical terms. https://www.healthcare.gov/sbc-glossary/
• Medicaid.gov. (n.d.). Early and Periodic Screening, Diagnostic, and Treatment (EPSDT). https://www.medicaid.gov/medicaid/benefits/early-and-periodic-screening-diagnostic-and-treatment
• National Institute of Mental Health. (n.d.). Autism spectrum disorder. https://www.nimh.nih.gov/health/topics/autism-spectrum-disorders-asd
• North Carolina General Assembly. (2015). Session Law 2015-271, Senate Bill 676: An act to provide coverage for the treatment of autism spectrum disorder. https://www.ncleg.gov/EnactedLegislation/SessionLaws/HTML/2015-2016/SL2015-271.html