Arkansas Won't Accept One Autism Diagnosis. It Needs Two, From Different Professions.

Most states will accept an autism diagnosis from one qualified clinician. Arkansas will not. Its Medicaid definition requires two, and they cannot be the same kind of professional.

Two professionals, different types

Ark. Code Ann. § 20-77-124 defines autism spectrum disorder, for Medicaid purposes, as a condition

“diagnosed by at least two (2) qualified professionals of different types who each conclude that a child fully meets the diagnostic criteria under the most recent edition of the American Psychiatric Association's Diagnostic and Statistical Manual of Mental Disorders.”

And it closes the list of who counts: “‘Qualified professional' only includes a licensed physician, licensed psychologist, or licensed speech-language pathologist.”

Three disciplines, of which you need two — and they must differ. Two psychologists is not two qualified professionals of different types. Each must independently conclude the child fully meets DSM criteria.

Section 212.200 of the ABA therapy manual routes straight back to that statute: a beneficiary must have an ASD diagnosis “established in accordance with Ark. Code Ann. § 20-77-124,” demonstrated either by a delineation of DSM criteria or by the results of one or more formalized ASD evaluation instruments administered by qualified professionals as defined in the statute.

What this does to a referral pipeline

Every other access rule we have covered this year narrows who may deliver ABA. This one narrows who may open the door to it. A developmental pediatrician's diagnosis, on its own, does not establish eligibility in Arkansas — it establishes half of it. The second opinion has to come from a different discipline, which in practice usually means a psychologist or an SLP, and speech-language pathology is not where most referral pathways look for an autism diagnosis.

Contrast South Carolina, which now refuses to pay a clinic to treat a child its own affiliate diagnosed, and Ohio, whose draft rule would require the diagnosing practitioner to be independent of the treating provider. Those are conflict-of-interest rules about whose diagnosis counts. Arkansas is a different instrument entirely: a corroboration rule about how many.

The rest of the gate

• Age 18 months to 21 years, with age determined as of the date of the treatment prescription.
• An initial evaluation referral signed and dated by the beneficiary's Medicaid-assigned PCP, a substitute physician, or an affiliated physician in the same Medicaid group — on form DMS-641 ER. It is required only for the initial comprehensive evaluation; a comprehensive reevaluation to demonstrate continued eligibility needs no new referral.
• A treatment prescription on form DMS-641 TP.
• Beneficiaries already receiving ABA under an active DMS-693 prescription as of January 1, 2025 keep it until it expires, rather than re-papering immediately.

The six-month RBT clock

Arkansas also puts a hard stop on provisional technicians:

“An individual in the process of completing the training and testing required to receive RBT certification may be provisionally treated as an RBT … for up to six (6) months. If the individual has not received RBT certification within six (6) months, then they are prohibited from providing applied behavior analysis therapy services until RBT certification is obtained.”

Not a warning, not a rate reduction — prohibited from providing services. For a provider hiring ahead of certification, that date is a staffing cliff, and it runs per individual rather than per cohort.

The limits

None of this is new. The manual sections carry a 1-1-25 stamp throughout and the statutory definition is older still — this is a standing requirement we had not covered, not a change arriving. We read the ABA therapy manual and the statutory definition; we did not review the separate Autism Waiver manual, which has its own terms. The statute's definition governs the Medicaid ASD determination and does not purport to tell a clinician how to practice. And the two-professional rule is a definition of the diagnosis, not a requirement that both professionals be enrolled Arkansas Medicaid providers — a distinction worth confirming with DHS before you build intake around it.

What you must know or do

• Audit your Arkansas intakes for a second diagnosis of a different discipline. This is the single most likely reason an otherwise complete file fails. If your records show one physician's diagnosis and nothing else, eligibility is not established.
• Check that the two are different types, not just two names. Two psychologists does not satisfy a statute that says “of different types.”
• Confirm each concluded the child fully meets DSM criteria. A report noting features consistent with ASD is not the same as the conclusion the statute asks for, and the word in the text is “fully.”
• Track every provisional RBT against a six-month date, individually. On day 181 without certification, that person cannot deliver ABA in Arkansas. Put the date in the roster, not in someone's memory.
• If you are building referral relationships: speech-language pathologists are one of only three qualifying disciplines here. That is unusual, and it is worth knowing which SLPs in your area conduct ASD evaluations.