Applied behavior analysis has become one of the most heavily audited service lines in state Medicaid programs. The HHS Office of Inspector General has run a multi-state audit series on Medicaid ABA payments for children diagnosed with autism, and every completed report has found a substantial share of sampled claims improper. Audits of Indiana, Wisconsin, Maine, and Colorado together identified close to $198 million in improper fee-for-service ABA payments. Incomplete assessments, thin session notes, and supervision gaps drove those findings, and they are the same issues state program integrity units and managed care plans now test against every ABA provider group's claims.
The OIG Audit Series and Its Findings
The OIG's ongoing audit series on Medicaid ABA payments tests whether state Medicaid agencies paid ABA claims in compliance with federal and state requirements. In the reports issued so far, auditors found $56 million in improper payments in Indiana, $18.5 million in Wisconsin, $45.6 million in Maine, and $77.8 million in Colorado, with another $207 million in Colorado claims flagged as potentially improper. In each state, nearly every sampled enrollee-month included at least one improper claim line. Maine's report cited children who lacked a required assessment before services began and session notes that omitted a full description of the service provided, the goals addressed, or the data collected.
Supervision Ratios Between BCBAs and RBTs
ABA is typically delivered by a registered behavior technician (RBT) working under the direction of a Board Certified Behavior Analyst (BCBA), and state Medicaid programs hold the supervising BCBA responsible for the technician's work. Montana's Medicaid ABA services manual, for example, states that the supervising BCBA is responsible for all work RBTs perform, consistent with the Behavior Analyst Certification Board's practice guidelines. Ratios vary by state: some track the certification board's baseline percentage of billed hours, others impose a higher ratio or mandate direct observation of newly credentialed technicians. An auditor matches every billed RBT session against a corresponding supervision record, and a billing period with technician claims but no matching supervision note is one of the clearest signals auditors flag first.
Session Notes and Authorization Alignment
State Medicaid programs generally require an individualized treatment plan, developed from a behavior identification assessment, before ongoing ABA services begin, and Montana's manual sets that plan's completion deadline at 30 calendar days from the onset of services, with continued-service authorization requests due roughly two weeks before the current authorization expires. Every billed unit needs a session note that supports it: the specific goals addressed, the data collected, and a service time that matches the units claimed. The completed OIG reports repeatedly found the reverse, session notes that did not support the billed time and claims for units outside the authorized date range or quantity. Any of those gaps can turn an otherwise defensible claim into a recoupment finding.
Every completed state audit in the OIG's ABA series found improper or potentially improper billing in nearly every sampled case. Documentation gaps, not treatment quality, drove the findings.
What an ABA Provider Group Should Expect
A state Medicaid program integrity unit or managed care plan investigating an ABA provider group typically requests the diagnostic evaluation, the underlying assessment, the treatment plan and its updates, the authorization approvals, the supervision logs, and the session notes for the sampled period. Discrepancies between what was billed and what the file supports can lead to a recoupment demand, and a pattern of billing a state characterizes as knowing can raise exposure under its false claims act. Program exclusion under the federal OIG exclusion authority is a real risk where supervision or credentialing failures suggest services were rendered by unqualified staff. A provider group that receives an audit notice retains the right to pursue an audit appeal, and the strength of that appeal turns heavily on the documentation assembled in response to the initial request.
Why Early Legal Counsel Is Critical
It is critical that ABA provider groups promptly retain experienced healthcare defense counsel upon receiving a subpoena, audit notice, investigative request, or other government inquiry. Early legal intervention can protect the provider's rights, ensure appropriate responses to government requests, avoid inadvertent admissions, preserve relevant defenses, and allow counsel to communicate with investigators on the provider's behalf. Delaying legal representation can significantly affect the outcome of a matter and expose the provider to unnecessary risk.
How Health Law Alliance Can Help
Health Law Alliance defends healthcare providers, including ABA provider groups, in Medicaid audits, program integrity investigations, and administrative appeals nationwide. Our team includes a former federal prosecutor with experience overseeing healthcare audits, and we work directly with state Medicaid agencies and managed care plans on behalf of the providers we represent. If your ABA provider group has received a Medicaid audit notice, records request, or recoupment demand tied to supervision, documentation, or authorization findings, contact us for a free, confidential consultation.
