By Matt Harrington, BCBA · Behaviorist Book Club · April 2026 · 12 min read

Ethics of Effective Treatment: Medical Necessity Determinations for Behavior Analysts

Overview & Clinical Significance

The landscape of behavior analytic practice has undergone a fundamental transformation with the widespread adoption of insurance funding in the United States. Behavior analysts, historically trained as scientists with backgrounds in psychology, education, or related fields, are now expected to operate as medical professionals within healthcare systems that require medical necessity determinations for authorization and continued funding of services. This shift has profound implications for how behavior analysts conceptualize, document, and justify their services.

Amanda N. Kelly's presentation addresses a critical gap in the professional preparation of many behavior analysts: the ability to make and document medical necessity determinations for ABA services. While the original research demonstrating the efficacy of focused and comprehensive treatment models provided the scientific foundation for ABA services, the practical skill of translating clinical assessment into medical necessity documentation is not consistently taught in university programs. This gap creates challenges that affect both the quality of care and the sustainability of services.

The clinical significance of medical necessity determination extends far beyond administrative paperwork. When behavior analysts make well-reasoned medical necessity determinations, they are engaging in a fundamentally clinical act that shapes the trajectory of a client's treatment. The determination of how many hours of service a client needs, whether comprehensive or focused treatment is indicated, what types of services are required, and for how long those services should continue are all clinical decisions with direct consequences for client outcomes.

Poorly made medical necessity determinations can harm clients in either direction. Overestimating medical necessity leads to excessive service utilization that may not benefit the client and that strains limited healthcare resources. Underestimating medical necessity denies clients the intensity and duration of services they need to make meaningful progress. In either case, the client does not receive optimal care, and the behavior analyst has failed to fulfill their professional obligation to provide effective treatment.

The ethical dimensions of medical necessity determination are substantial. Behavior analysts must balance their clinical judgment about what the client needs with the documentation requirements of the healthcare system, the expectations of the funding source, and the organizational pressures of their employment setting. Navigating these competing demands with integrity requires both clinical competence and ethical clarity.

Background & Context

The evolution of behavior analysis from an academic discipline to a healthcare profession has been rapid and, in some ways, incomplete. The scientific foundations of ABA were established through decades of basic and applied research, culminating in a robust evidence base demonstrating the effectiveness of behavioral intervention across numerous populations and clinical presentations. The early research on comprehensive early intervention for children with autism provided the impetus for insurance coverage mandates, which began spreading across US states in the mid-2000s and have now been enacted in every state.

This transition to insurance-funded service delivery brought with it a set of expectations and requirements for which many behavior analysts were not explicitly prepared. Medical necessity determination, a concept borrowed from general medicine and adapted for behavioral health, requires clinicians to demonstrate that proposed services are medically necessary by meeting specific criteria established by insurance payers. These criteria typically address whether the condition requires treatment, whether the proposed treatment is expected to be effective, whether the proposed intensity and duration of treatment are appropriate, and whether less restrictive alternatives have been considered.

The challenge for behavior analysts is that medical necessity determination requires skills that straddle clinical assessment, healthcare policy, and professional writing. A behavior analyst must conduct a thorough behavioral assessment, interpret the results within the context of the individual's overall functioning and prognosis, determine the appropriate level and intensity of services, and document all of this in a manner that meets the specific requirements of the relevant insurance payer. Each of these steps involves clinical judgment, and university programs have varied significantly in how well they prepare graduates for this complex professional activity.

Amanda N. Kelly's presentation addresses this preparation gap by providing behavior analysts with practical knowledge about insurance and documentation requirements and the clinical reasoning skills needed to make sound medical necessity determinations. The course recognizes that behavior analysts cannot simply be taught to fill out forms; they must understand the clinical, ethical, and systemic principles that underlie medical necessity determination.

The broader healthcare context is also relevant. Insurance payers employ clinical reviewers who evaluate medical necessity determinations submitted by behavior analysts. These reviewers may or may not have behavior analytic training, and their decisions are influenced by payer-specific guidelines, industry standards, and cost containment pressures. Behavior analysts who understand this review process are better equipped to submit determinations that effectively communicate the clinical justification for services.

The responsibility for teaching medical necessity determination has increasingly fallen to employers and supervisors rather than university programs. This creates inconsistency in the quality of preparation across the workforce and places a significant burden on organizations to develop internal training systems. Amanda N. Kelly's course contributes to closing this gap through continuing education that directly addresses the competencies needed.

Clinical Implications

Making accurate medical necessity determinations has direct implications for the quality, intensity, and duration of ABA services that clients receive. The clinical decisions embedded in these determinations shape treatment trajectories in ways that significantly affect outcomes.

The determination of treatment model, whether comprehensive or focused, is one of the most consequential clinical decisions a behavior analyst makes. Comprehensive treatment models involve intensive, multi-domain intervention that addresses a broad range of behavioral targets across communication, social skills, adaptive behavior, and challenging behavior. Focused treatment models target a limited number of specific behavioral goals. The research base for both models indicates that they are appropriate for different clinical presentations, and the medical necessity determination should match the model to the client's needs based on thorough assessment.

Service intensity recommendations must be clinically justified and individually determined. The number of hours per week recommended for a client should reflect the assessment of the client's needs, the complexity of the behavioral targets, the availability and skill of caregivers, and the expected rate of progress. Cookie-cutter intensity recommendations that apply the same number of hours to all clients regardless of individual circumstances do not meet the standard of individualized medical necessity determination.

The assessment process that informs medical necessity determination must be comprehensive and clinically rigorous. This includes formal assessment of adaptive behavior, developmental level, communication skills, and behavioral presentation. Functional behavior assessment should inform the understanding of challenging behavior when present. Caregiver interview and observation in natural environments provide contextual information that standardized assessments may not capture. The synthesis of this multi-source assessment data into a coherent clinical picture is the foundation of a defensible medical necessity determination.

Documentation quality directly affects authorization outcomes. Behavior analysts who write clear, well-organized, clinically substantive medical necessity determinations are more likely to receive appropriate authorizations than those who submit vague or poorly justified documentation. This is not merely an administrative skill but a clinical communication competency. The ability to translate complex clinical reasoning into written documentation that a non-behavioral reviewer can understand and evaluate is essential for ensuring that clients receive the services they need.

Reauthorization determinations require ongoing clinical assessment and documentation of progress, current needs, and justification for continued services. Behavior analysts must demonstrate that services remain medically necessary by showing that the client continues to benefit from treatment, that treatment goals remain appropriate, and that the recommended intensity and duration of ongoing services are clinically justified. This requires ongoing data analysis, regular reassessment of the treatment plan, and documentation that reflects current clinical status rather than simply repeating previous authorization language.

The clinical implications extend to service transitions and discharge planning. Medical necessity determination includes recognizing when a client no longer requires the current level of service and planning appropriate transitions to less intensive support. Maintaining clients at unnecessarily high service levels is both clinically inappropriate and ethically problematic, just as prematurely reducing or terminating services that remain necessary.

Ethical Considerations

Medical necessity determination sits at the intersection of multiple ethical obligations that behavior analysts must balance carefully. Amanda N. Kelly's course addresses these ethical dimensions directly, recognizing that making medical necessity determinations with integrity is one of the most ethically consequential activities in behavior analytic practice.

Code 2.01 (Providing Effective Treatment) requires behavior analysts to use the most effective treatment approaches available and to recommend services based on the best available evidence. In the context of medical necessity determination, this means recommending the intensity, duration, and type of services that the evidence base and clinical assessment indicate are needed for the specific client. Recommending fewer services than clinically indicated to appease a payer, or more services than needed to maximize revenue, both violate this code provision.

Code 2.04 (Documenting Professional Work and Research) requires accurate, timely, and sufficient documentation. Medical necessity determinations are among the most important documents behavior analysts produce, and they must accurately represent the client's clinical status, the assessment findings, and the clinical reasoning behind the service recommendation. Documentation that misrepresents the client's needs, exaggerates the severity of the presentation, or minimizes progress to justify continued services violates this code.

Code 1.04 (Integrity) requires honesty in all professional activities. Medical necessity determination requires honest representation of what the client needs, even when that representation may result in authorization denials or reduced funding. A behavior analyst who inflates severity ratings, fabricates assessment results, or manipulates documentation to secure funding is acting without integrity regardless of their intention to benefit the client.

Code 2.13 (Selecting, Designing, and Implementing Assessments) applies to the assessment process that informs medical necessity determination. The assessments selected must be appropriate for the individual and the clinical questions being addressed. Using assessments that are not validated for the population, administering assessments incorrectly, or interpreting results inaccurately all compromise the foundation on which the medical necessity determination rests.

Code 3.01 (Responsibility to Clients) requires that client welfare be the primary consideration. When organizational or financial pressures conflict with clinical judgment about what the client needs, the behavior analyst must prioritize the client. This may mean advocating for services that the payer initially denies, recommending service reductions when the client has made progress, or challenging organizational practices that prioritize revenue over clinical appropriateness.

The ethical obligation to provide effective treatment also includes the responsibility to advocate for systemic change when payer policies do not adequately support evidence-based practice. Behavior analysts who accept unreasonable authorization limits without appeal or advocacy may be failing to fulfill their ethical obligation to their clients, even if they are operating within the constraints imposed by the funding system.

Finally, the ethical implications of medical necessity determination include considerations of equity. If certain populations systematically receive lower authorization levels due to documentation biases, assessment limitations, or payer policies, behavior analysts have an ethical obligation to recognize and address these disparities.

Assessment & Decision-Making

Making sound medical necessity determinations requires a systematic assessment and decision-making process that integrates clinical data, evidence-based guidelines, and individual client context.

The assessment foundation begins with a comprehensive evaluation of the individual's current functioning. This evaluation should include standardized adaptive behavior assessment, developmental or cognitive assessment when available, communication assessment, assessment of challenging behavior including functional assessment, and evaluation of the individual's functioning across life domains including home, school or work, and community settings. Each assessment contributes specific data points that inform different aspects of the medical necessity determination.

The interpretation of assessment data requires clinical judgment. A raw score on an adaptive behavior measure provides normative context, but the clinical significance of that score depends on the individual's history, trajectory, environmental supports, and personal goals. Two individuals with identical assessment scores may require very different service levels based on their specific circumstances, and the medical necessity determination must reflect this individualized analysis.

Determining the appropriate treatment model involves matching the individual's clinical presentation to the evidence base for different service delivery approaches. Factors to consider include the breadth of domains affected, the severity of deficits across domains, the individual's age and developmental trajectory, the presence and intensity of challenging behavior, and the availability and capacity of caregivers and other support systems. These factors should collectively drive the recommendation for comprehensive versus focused treatment.

Intensity determination, the specific number of weekly service hours recommended, should be justified by multiple clinical factors rather than defaulted to a standard number. Consider the number and complexity of treatment targets, the expected rate of progress based on the individual's learning history, the availability of supplementary support from caregivers and other providers, the setting requirements for effective intervention, and any constraints that affect service delivery logistics.

The decision-making process should include explicit consideration of less restrictive alternatives. Medical necessity frameworks generally require that the recommended level of service be the least restrictive intervention that is expected to produce meaningful outcomes. Behavior analysts should document why less intensive services would be insufficient and why the recommended level is the minimum necessary for effective treatment.

Documentation of the medical necessity determination should follow a clear logical structure that connects assessment findings to clinical conclusions to service recommendations. Each element of the recommendation should be traceable to specific assessment data and clinical reasoning. Avoid vague justifications and instead provide concrete, data-supported arguments for each aspect of the service plan.

The appeal process for denied authorizations is an important component of the decision-making framework. When a medical necessity determination is denied by a payer, the behavior analyst should evaluate whether the denial reflects a legitimate clinical disagreement or inadequate documentation. If the clinical need is genuine, pursuing the appeal process is not only permitted but may be ethically required.

What This Means for Your Practice

Amanda N. Kelly's course on the ethics of effective treatment and medical necessity determination provides knowledge and skills that are immediately applicable to your daily clinical practice. Here is what you should take away.

Treat medical necessity determination as a clinical skill, not an administrative task. The quality of your determinations directly affects the services your clients receive. Invest the same clinical rigor in assessment, reasoning, and documentation for medical necessity as you would for any other clinical decision.

Develop your assessment competence for the specific purpose of informing medical necessity. Ensure that your assessment battery produces the data needed to justify service recommendations. If your current assessments are insufficient, expand them. If your interpretation skills need refinement, seek supervision or consultation.

Write documentation that communicates your clinical reasoning clearly to reviewers who may not share your behavior analytic background. Avoid jargon when simpler language conveys the same meaning. Structure your documentation logically, connecting assessment findings to clinical conclusions to service recommendations in a clear narrative.

Be honest in your medical necessity determinations. Represent your clients' needs accurately, even when accuracy may result in lower authorizations than you or the family hoped for. Advocate for adequate services through the appeal process when authorizations are insufficient, rather than inflating documentation to prevent denials.

Stay current with insurance requirements and payer-specific guidelines. The medical necessity criteria used by different payers are not identical, and understanding the specific requirements of each payer you work with allows you to tailor your documentation appropriately while maintaining clinical integrity.

Finally, advocate for better preparation of new behavior analysts in medical necessity determination. If you supervise trainees, include this competency in your supervision curriculum. If you are involved in university training programs, advocate for inclusion of healthcare documentation skills in the curriculum. The field's credibility within the healthcare system depends on the quality of medical necessity determinations produced by individual practitioners.