What Is the CMS ABA Toolkit? Key Takeaways for ABA Providers

Individualized Treatment Intensity

Treatment intensity and dosage aren't new topics in ABA. There's no shortage of literature discussing them. What's often missing, though, is guidance practitioners can actually put to use in a session or a treatment plan. The toolkit steps into that gap, at least as a first pass.

It emphasizes the importance of individualized treatment intensity, noting that ABA may range from five to 40 hours per week depending on the learner's needs. At the same time, CMS states plainly that 40 hours per week is not a best practice. Its rationale, though, focuses less on clinical judgment and more on audit and billing concerns: children need time for activities of daily living such as eating, toileting, napping during which ABA services generally shouldn't be billed. From there, CMS suggests states consider requiring a break in service and billing after a specified number of consecutive units.

The toolkit also offers an example of a best practice for determining intensity, aligning roughly 10, 20, and 30 weekly hours with Level 1, Level 2, and Level 3 support needs, respectively. But in the same breath, it acknowledges there's no consensus on a set number of treatment hours and it doesn't cite a source for this specific recommendation.

Clinicians can look to recent literature from Peterson et al. (2024) and Samelson et al. (2025) to start to review literature on treatment intensity and dosage, while these articles do not give clear guidance they are a nice evidence-base which can offer considerations in dosage. In the realm of treatment intensity, the toolkit gets specific: it's offering an example, not quite a standard which readers should consider.

The central takeaway is that CMS recommends high-intensity services not be authorized by default. Instead, the requested hours should be supported by an individualized treatment plan that clearly documents the learner's assessed needs, goals, and clinical justification.