Key Takeaways
- ABA therapy hours typically range from 10-40 per week, but no standardized method exists for determining the right dosage for each child.
- State Medicaid ABA spending has surged by hundreds to thousands of percent in recent years, prompting rate cuts in Nebraska, Indiana, North Carolina, and others.
- Early intervention that works reduces lifetime costs for healthcare, education, and adult services. Rate cuts that limit access may shift spending to later-life support rather than eliminating it.
- Fraud enforcement and documentation requirements affect all providers, not just bad actors. Blanket compliance burdens raise costs industry-wide even when the underlying concerns are legitimate.
- Research shows at least 40% of treatment response variation is unrelated to dosage, complicating the “more hours = better outcomes” assumption.
- Not all ABA dosage research is methodologically equal. Retrospective chart reviews can identify correlations but cannot establish causation—a distinction that matters when lower-intensity studies are used to justify cost-driven cuts.
- A child’s treatment needs are not static. Clinical evidence suggests intensity requirements can increase during adolescence, making policies that cap hours based on early-childhood profiles potentially inadequate over a lifetime.
- New data-driven tools are emerging to help BCBAs recommend evidence-based hours, but the field lacks consensus.
When Nebraska announced it would slash Medicaid reimbursement rates for autism therapy by as much as 48 percent last summer, Chris Szydelko thought about his son Liam. Four years ago, Liam was nonverbal. He didn’t want to be held. He wouldn’t make eye contact with his parents or play with his sisters. After two and a half years of applied behavior analysis therapy, the six-year-old runs to his father at pickup, screaming “Dad!” and throwing his arms around him.
Liam graduated from his ABA program just weeks before the rate cuts took effect. But Szydelko couldn’t stop thinking about other families just beginning their journey. “What if he was just starting?” he told Nebraska Public Media. “I would want someone else to stick up for him.”
Across the country, thousands of families are navigating a shifting landscape. On one side: state Medicaid programs confronting explosive growth in autism therapy spending, with costs rising as much as 3,000 percent in some states over just a few years. On the other: providers who argue that children need intensive intervention during critical developmental windows. Caught between them: the children themselves, whose treatment plans have become a flashpoint in a larger debate about healthcare costs.
The question at the center of the debate is deceptively simple: How many hours of therapy does a child actually need? The answer, it turns out, depends on who you ask—and what kind of evidence you find convincing.
How ABA Therapy Hours Are Determined
ABA therapy has always been defined by its intensity. When O. Ivar Lovaas pioneered the intervention at UCLA in the 1960s, he prescribed 40 hours per week of highly structured, one-on-one treatment. His landmark 1987 study reported that 47 percent of children receiving this intensive regimen achieved “normal intellectual and educational functioning”—a result that seemed remarkable for an era when autism was largely considered untreatable.
That 40-hour standard became the foundation for modern practice. The Council of Autism Service Providers’ guidelines—originally published by the Behavior Analyst Certification Board and now the industry’s primary reference—recommend 10-25 hours per week for “focused” treatment addressing specific behavioral targets, and 26-40 hours per week for “comprehensive” treatment when children show deficits across multiple developmental domains. Insurance mandates, which now exist in all 50 states for commercial plans, were built around the assumption that ABA was inherently intensive.
But the research undergirding those hour recommendations is less definitive than many assume. A 2022 study published in BMC Pediatrics examined data from Kyo, a California-based ABA provider, and found something unexpected: children appeared to improve across a range of treatment intensities. The study’s authors wrote that “at least 40% of variation in treatment response is attributable to factors unrelated to treatment dosage.”
Dr. Paula Braga-Kenyon, a licensed psychologist who has worked in behavior analysis for three decades, describes the hour-determination process as inherently complex. After completing her doctoral work at the New England Center for Children, she now consults for ABA providers in the United States and Brazil and teaches at Northeastern University’s master’s program in behavior analysis. The clinical process, she explains, begins with mapping goals across developmental areas—communication, social interaction, play, motor abilities—and building a therapeutic plan around them.
“It’s not like there’s a test where you score here and that tells you how many hours you need,” Kenyon said. “It’s not as black and white as we’d like it to be.”
This ambiguity has created room for disagreement. Providers generally advocate for more hours, arguing that children with autism have narrow developmental windows and that under-treatment can leave lasting deficits. Payers counter that the lack of standardized dosage guidelines makes it difficult to distinguish necessary care from overutilization. Both sides can point to research supporting their position.
Dr. Gina Green, a former president of the Association for Behavior Analysis International whose own research helped establish the evidence base for intensive ABA intervention, points to a recently published meta-analysis by Eldevik and colleagues as the strongest available evidence on the question. Unlike retrospective chart reviews, the Eldevik meta-analysis aggregated individual participant data from controlled, prospective studies of early intensive ABA—research conducted forward in time with defined treatment and comparison groups. The analysis found differential effects at low, moderate, and high intensities for children under seven, providing what Green calls “a fine-grained picture” of how intensity relates to outcomes.
“We don’t make blanket decisions or recommendations on things like treatment dosage,” Green said. “You always consider the individual kid’s characteristics, their circumstances, and their family.”
Medicaid ABA Spending: State-by-State Cost Growth
State Medicaid directors are looking at spending trajectories that demand attention. In North Carolina, ABA spending was projected to leap from $122 million in fiscal 2022 to $639 million in fiscal 2026—a 423 percent increase in four years. Nebraska saw its ABA expenditures grow from $4.6 million in 2020 to $85.6 million in 2024. Indiana’s costs went from roughly $17 million in 2017 to $611 million by 2023—an almost 3,000 percent increase in six years.
The drivers are straightforward: more children are being diagnosed with autism than ever before (the CDC now estimates 1 in 31 children), and federal mandates require Medicaid programs to cover medically necessary treatments for children under 21. But the speed of the increase has forced budget officers to make difficult decisions about competing healthcare priorities.
“No business, state, or federal program can absorb that kind of cost growth without facing serious long-term risks,” Jeff Powell, communications director for Nebraska’s Department of Health and Human Services, said in explaining the state’s rate cuts.
The response has been a patchwork of cost-control measures. Nebraska cut its highest-paid ABA service code by 48 percent. Indiana and North Carolina have proposed or implemented rate reductions and hourly caps. Colorado is exploring similar changes. States that had used high reimbursement rates to build up their provider networks are now adjusting those rates downward, sometimes with relatively short notice periods.
Green, however, cautions against viewing reduced hours as a straightforward cost-saving measure. Research on cost-effectiveness suggests that effective early intervention actually saves money over a person’s lifetime by reducing later utilization of healthcare, education, and adult services. “If they don’t get effective intervention to help them develop skills and reduce problem behavior, they will need and use more services over their lifetime than if they’d gotten good intervention when they were young.”
Medical Necessity and Utilization Review in ABA
When payers talk about efficiency in ABA services, they typically mean one of three things: ensuring that authorized hours are medically necessary, preventing fraud and billing abuses, and aligning reimbursement rates with market conditions. Each goal is reasonable in isolation. The challenges emerge in implementation.
Medical necessity determination in ABA lacks the clear standards that exist for some other interventions. A 2024 study in the Journal of Autism and Developmental Disorders noted that “there is currently no standard method” for determining how many hours of therapy a child needs, requiring BCBAs to rely on clinical judgment that “may be underdeveloped in some BCBAs, particularly those who are newly certified.”
Braga-Kenyon sees this firsthand in her teaching. “The behavior analysts just finishing and passing the exam don’t have twenty or thirty years of experience to look at a client and say, ‘These are the areas you need to work on,'” she said. “It takes time to build that repertoire.”
Utilization review—where insurance representatives evaluate treatment plans—is intended to ensure appropriate prescribing. The process involves prior authorization requests, reauthorization cycles every few months, and sometimes peer-to-peer reviews where clinicians discuss cases with insurance company representatives. Providers say this takes significant time; payers say it’s necessary oversight.
Braga-Kenyon describes a system where insurers have begun imposing caps that aren’t always transparent. “Some insurers won’t approve, and when you go to peer review they’ll say, ‘We only approve up to ten hours,'” she said. “You tell them, ‘The law says you can’t do that,’ and they say, ‘Oh, it’s not really a rule.’ But it’s how they’re operating.”
The fraud concerns have substance. A federal audit of Indiana’s Medicaid program estimated at least $56 million in improper payments in 2019 and 2020, noting some providers had billed for questionable hours, including during nap time. South Florida has seen multiple billing scheme prosecutions. But increased documentation requirements affect all providers, not just bad actors—raising compliance costs industry-wide.
Is 40 Hours of ABA Therapy Necessary?
Not every ABA provider approaches dosage the same way. Some industry voices have begun questioning whether the traditional emphasis on maximizing hours always serves children’s interests.
Corey Cohrs, CEO of Radical Minds in Omaha, publicly welcomed Nebraska’s rate cuts. He has criticized what he sees as an “overemphasis by some ABA providers on providing a blanket 40 hours of services per child per week.” In his view, Nebraska’s new 30-hour weekly cap, combined with lower rates, will push providers to focus on outcomes rather than billing volume.
Green offers a different framing. The question isn’t simply whether 15 hours or 40 hours is “correct”—it’s that blanket policies in either direction fail to account for individual variation. “A blanket statement like ’15 hours a week is adequate for any child’ doesn’t suffice because of the need for individualized assessments,” she said. The same logic, she noted, applies to blanket prescriptions of 40 hours.
She compared the process to a physician prescribing medication: research provides general expectations about what works, but the dosage must be individualized based on the patient’s age, weight, other conditions, and response to treatment. “Behavior occurs at the level of the individual,” Green said. “Behavior analysis by its very nature is highly individualized.”
Modern ABA has evolved considerably from Lovaas’s table-based drills. Most practitioners now emphasize play-based, naturalistic interventions tailored to each child’s interests. Sara Germansky, a BCBA in New York, told the Child Mind Institute that she typically sees children “every weekday for about two hours”—well below the 40-hour model. “The more severe the behavior or delays, the more hours they’re given,” she explained.
The challenge is that individualization is resource-intensive to assess, document, and justify. A standardized 30-hour plan is administratively simpler than one that fluctuates between 10 and 35 hours based on a child’s changing needs. Payers often prefer predictability; clinicians often need flexibility. Finding the right balance remains an open question.
Treatment intensity, Green added, should be understood as dynamic rather than fixed. “We might have kids who do well with moderately intensive intervention when they’re young,” she said. “But as they age—life events, adolescence—they may develop behaviors that jeopardize their health and safety and need more intensive intervention at that point.” A policy that caps hours for a five-year-old may prove inadequate for the same child at fourteen.
What Happens When States Cut ABA Therapy Hours
Gaile Osborne experienced firsthand what policy changes mean for individual children. Her adopted three-year-old daughter, Aubreigh, was diagnosed with autism at 14 months. After struggling with outbursts and self-injury, Aubreigh started ABA therapy in North Carolina. The progress, her mother said, was “unreal.”
Then, in October 2025, Aubreigh’s weekly hours were reduced from 30 to 15 as North Carolina worked to manage Medicaid costs. Osborne spent weeks navigating the state’s Medicaid bureaucracy, making her daughter’s case. Eventually, services were restored. But not every parent has the time or resources to mount such an effort—a disparity that both sides of the debate acknowledge.
The Nebraska experience illustrates the market dynamics at play. Above and Beyond Therapy, which collected more than $28.5 million from Nebraska Medicaid in 2024—roughly a third of total state ABA spending—initially announced it would exit the program entirely after the rate cuts. A week later, citing a “tremendous outpouring” from families, the company reversed course. Smaller providers may have fewer options.
“The magnitude of this unprecedented rate cut will undoubtedly reduce access to ABA throughout the state of Nebraska,” Brad Zelinger, founder of Stride Autism Centers, which operates six Nebraska locations, told Autism Business News.
Rural areas face particular challenges. Angela Gleason, whose 13-year-old son Teddy has autism, told Stateline that many Nebraska providers only serve children up to age six. Access to ABA therapy for older children is already limited; rate changes add another variable to the equation.
Data-Driven Tools for ABA Treatment Dosage
Some providers are trying to address the tension through technology and data. Companies like Kyo have developed “data-driven, client-centric” care plans that aim to optimize outcomes across a range of treatment intensities. Their research suggests that careful individualization can produce strong results without defaulting to maximum hours.
RethinkBH has developed a Medical Necessity Assessment tool that uses data analytics to recommend evidence-based dosages. The goal is to give BCBAs—especially newer ones—objective guidance while giving payers more confidence in authorization decisions.
Braga-Kenyon and her colleagues at Gracent, an ABA provider, have taken a similar approach, developing an internal “care calculator” that weighs variables including Vineland scores, quality of life measures, the number of other therapies a child receives, age, and diagnosis level. The tool emerged from frustration with the lack of standardized methods—and from watching a field flooded with newly certified BCBAs who lack the clinical experience to confidently prescribe hours.
The calculator isn’t meant to replace clinical judgment, Braga-Kenyon emphasized. At Gracent, clinicians first conduct their assessments and determine hours independently, then run the calculator as a cross-check. If there’s a significant discrepancy, it triggers a peer review. “The calculator doesn’t have to guide the decision,” she said, “but it’s a tool to help you arrive at a number you can then justify.”
The team plans to present the tool at an upcoming ABAI conference and make it freely available, hoping to generate discussion in a field that has struggled to establish dosage norms. “Our goal wasn’t to create a product to sell,” Braga-Kenyon said. “It was to generate discussion in the field.”
Value-based care models, which tie reimbursement to outcomes rather than hours delivered, are beginning to emerge in the ABA space. These arrangements could theoretically align provider and payer incentives—both sides would benefit when children make measurable progress efficiently. But they require outcomes measurement systems that most providers haven’t yet developed, and defining “success” in autism treatment is itself contested.
Parent training is another approach gaining attention. Some research suggests that coaching parents to implement behavioral strategies at home can extend the benefits of clinical sessions without adding therapist hours. The challenge is that parent training is itself time-intensive and requires its own reimbursement structure.
Advocacy groups like the Council of Autism Service Providers are pushing for states to conduct cost studies before implementing rate changes—rather than simply benchmarking to neighboring states that may have different population densities, provider networks, and service models.
What Research Says About ABA Therapy Intensity
Underlying the policy debate is a more fundamental question: What kind of evidence should guide these decisions?
Green draws a sharp distinction between retrospective chart reviews—where researchers look back at existing clinical records—and prospective controlled studies designed from the outset to answer specific research questions. The former, she argues, can identify correlations but cannot establish that a particular treatment caused a particular outcome. “You need to do a prospective study,” she said. “You specify the research questions, you specify the treatment and control conditions very carefully, you specify the measures that will be used to evaluate outcomes, and you control for other variables that might influence the result.”
This distinction matters because some studies suggesting that lower-intensity treatment produces comparable outcomes have relied on retrospective data. Green worries that such research could be used to justify reducing treatment hours for cost reasons rather than clinical ones—a concern shared by many providers.
“One study tells us what happened with a particular sample under particular conditions,” Green said. “We need meta-analyses that look at the entire body of research—many replications by independent investigators in different locations, different countries—and ask what that literature as a whole tells us.”
Braga-Kenyon, for her part, sees the intensity debate as inherently polarizing—and resistant to simple resolution. She pointed to a recent study from CARD suggesting that more hours help children meet more goals but don’t necessarily accelerate development in communication and social interaction. Her interpretation: if goals are set intentionally to improve quality of life, meeting more of them is itself a meaningful outcome. “This discussion can’t happen in a vacuum,” she said. “You have to consider everything else—where does this person live, what other services do they receive, what’s their quality of life now.”
The Future of ABA Therapy Hours and Funding
The math of autism therapy resists easy answers. Each child’s needs are different. Developmental windows operate on their own timelines. Progress is often nonlinear, with plateaus and breakthroughs that resist prediction.
States facing budget pressures have legitimate concerns about sustainability. Providers watching rate cuts have legitimate concerns about maintaining quality and access. Parents watching the debate have legitimate concerns about their children’s futures. The challenge is that all three sets of concerns are real, and addressing one often complicates the others.
Cathy Martinez, president of the Autism Family Network in Nebraska, framed it as a timing question: “We’re either going to pay it on the front end, doing these therapies necessary to their success, or on the back end for care provision when you don’t gain skills through their ABA therapy programs.”
Green echoed the sentiment in research terms: early intervention that works saves money across a lifetime. The question is whether policymakers will weigh those long-term savings against immediate budget pressures—and whether the field can develop the evidence base and standardized tools to make the case.
The question of how many hours is enough doesn’t have a universal answer. What families, providers, and policymakers seem to agree on is that the current system—with its rapid policy changes, administrative complexity, and persistent uncertainty—isn’t serving anyone as well as it could.
Chris Szydelko’s son Liam is doing well. He hugs his dad. He plays with his sisters. He speaks. Whether other children will have similar opportunities depends on decisions still being made in state capitols, insurance offices, and clinic rooms across the country.
Frequently Asked Questions:
How many hours of ABA therapy per week is recommended?
The Council of Autism Service Providers recommends 10-25 hours per week for focused treatment and 26-40 hours per week for comprehensive treatment, though the optimal number depends on each child’s individual needs and developmental profile.
Does insurance cover ABA therapy?
All 50 states have insurance mandates requiring commercial plans to cover ABA therapy. Medicaid also covers ABA for children under 21 when deemed medically necessary, though coverage terms vary significantly by state.
Is 20 hours of ABA enough?
Research suggests children can improve across a range of intensities. A 2022 BMC Pediatrics study found that at least 40% of treatment response variation was unrelated to dosage, indicating that factors beyond hours—including treatment quality and individualization—play a significant role.
