Aetna ABA coverage in Missouri: the intake guide.

Two lists, and the narrower one is the statute's. Aetna requires the diagnosis to come from a provider qualified to diagnose within their scope — a licensed psychologist, psychiatrist or physician — and its precertification form (GR-69017-4, eff. 1/1/2026) asks for the DSM-5 diagnosis code, the diagnosing provider and their credentials. On a plan the Missouri mandate reaches, the ABA itself must additionally be ordered by the treating licensed physician or psychologist, so a diagnosis from a nurse practitioner will not by itself satisfy the ordering requirement.^[1][2][3]

Aetna covers telehealth for 97151, 97153, 97155, 97156 and 97157 — 97152 is excluded — billed with GT, 95 or FR modifiers per its telemedicine payment policy. Treat the answer as perishable: Aetna announced it would end ABA telehealth coverage in late 2023 and rescinded the change within weeks. Missouri's Medicaid telemedicine rule, which expressly allows technician-delivered ABA by telemedicine, is a different program and does not bind a commercial Aetna plan.^[1]

Aetna: "We coordinate benefits as allowed by state or federal law following the National Associations of Insurance Commissioners (NAIC) guidelines. If there is no applicable law, then we coordinate according to the member's plan" — the manual's order-of-benefits list includes the birthday rule for children whose parents are not separated or divorced. Missouri's COB rule (20 CSR 400-2.030) governs fully insured group plans: when parents are not separated or divorced, "The benefits of the plan of the parent whose birthday falls earlier in a year are determined before those of the plan of the parent whose birthday falls later in that year" (same birthday: the plan that covered the parent longer); for divorced or separated parents a court decree naming the responsible parent controls. Self-funded plans follow their plan document instead, and Aetna notes many use "Maintenance of Benefits (MOB)" rather than the "100% Allowable" method most state laws require, so a secondary payment can be smaller. If the child also has Medicaid, this plan pays first: Medicaid is payer of last resort (42 CFR 433.139) — bill here, then send the EOB or denial to Medicaid, and get Medicaid's own prior auth too if the state requires it. TRICARE is secondary to this plan ("TRICARE shall be last pay," 32 CFR 199.8), and "CHAMPVA is the last payer to OHI" (38 CFR 17.276(d)).^{[8][12][13][14][15]}

The mandate sets no overall age limit on autism coverage — what it ages out is the dollar cap. RSMo § 376.1224 subjects ABA to “a maximum benefit of forty thousand dollars per calendar year for individuals through eighteen years of age,” a statutory base that is CPI-indexed (the Department of Commerce and Insurance publishes the adjusted figure annually). Coverage required under the section other than ABA “shall not be subject to the age and dollar limitations described in this subsection,” so OT, PT, speech, psychiatric and pharmacy care for autism carry no age cut-off and no dollar cap. Self-funded private ERISA plans are preempted from all of it; note Missouri's unusual reach into the state consolidated health care plan, self-insured governmental plans, MEWAs and self-insured school-district plans established on or after 1/1/2020.^[3]

Ask the plan: Benefits verification on the specific plan, via the payer portal or the number on the member’s card — ask whether RSMo § 376.1224 reaches this plan (it reaches fully-insured plans, the state consolidated health care plan, self-insured governmental plans, MEWAs and self-insured school-district plans established on or after 1/1/2020, but not private self-funded ERISA plans), and what the plan applies as this year’s dollar cap. The Missouri Department of Commerce and Insurance publishes the CPI-adjusted figure annually — quote that year’s number, never the $40,000 statutory base.

Yes on a plan the mandate reaches, and the statute is specific about who writes it: ABA “must be ordered by the treating licensed physician or psychologist” in a treatment plan, and must be supervised by a board-certified behavior analyst licensed under chapter 337. Capture the ordering physician or psychologist and the treatment plan they signed. Two Missouri rules work in the provider's favour once the order exists: the carrier may review the treatment plan no more than once every six months unless the provider agrees otherwise, and the cost of obtaining any review or treatment plan is borne by the plan. Self-funded private ERISA plans are outside the statute.^[3]

Ask the plan: Benefits verification on the specific plan, via the payer portal or the number on the member’s card — confirm first whether RSMo § 376.1224 reaches this plan. Where it does, capture the ordering licensed physician or psychologist and the treatment plan they signed, and the supervising chapter 337 licensed behavior analyst. Where it does not (a private self-funded ERISA plan), ask the carrier whether it requires a physician or psychologist order and in what form.

Aetna publishes no commercial decision clock of its own: ABA "services require prior authorization. To get ABA services precertified, call the number on the member's Aetna ID card," and the manual sets no reauthorization lead time (none in the ABA Medical Necessity Guide or the ABA precert form either). The legal ceiling depends on funding. Missouri fully insured plans are bound by RSMo 376.1363: a carrier "shall make the determination within thirty-six hours, which shall include one working day, of obtaining all necessary information," with an approval phoned or sent electronically to the provider within 24 hours; concurrent review (continuing an approved course) is decided "within one working day of obtaining all necessary information." The clock starts when the file is complete, not when the form lands. Self-funded ERISA plans are outside state law and follow 29 CFR 2560.503-1: a pre-service decision "not later than 15 days after receipt of the claim" (one 15-day extension), 72 hours for urgent care, and an urgent extension request decided within 24 hours if made at least 24 hours before the approval expires. Aetna's Missouri supplement adds the peer-to-peer window for fully insured members: request "within 14 calendar days of the denial letter date"; response "within one 24-hour working day of the request."^{[8][9][10][11]}

Ask the plan: Aetna precertification (number on the member ID card): ask whether the plan is fully insured or self-funded (which sets the legal clock) and how far before expiry Aetna wants the ABA reauthorization — Aetna publishes no lead time.

Aetna publishes no recency rule for the ASD diagnostic evaluation, and § 376.1224 sets none either — its six-month clock runs on plan review of the treatment plan, not on the age of the diagnosis. Capture the evaluation date anyway: the precertification package asks for it.^[1][3]

Ask the plan: The precertification call or Availity, when submitting form GR-69017-4 — ask whether an evaluation of this age will be accepted for this plan.

No instrument is named at either level. CPB 0554 does not require or reference a specific diagnostic tool, and the precertification form asks for the diagnosis code, the diagnosing provider and their credentials rather than for an instrument and score; § 376.1224 names none either.^[1][3]

Ask the plan: Aetna precertification (Availity or the number on the card) — ask whether a specific instrument is expected for this plan before scheduling testing.

Practitioners delivering ABA under CPB 0554 need BACB national certification or state behavior-analyst licensure, with unlicensed staff working under supervision per practice standards; Aetna publishes no numeric ratio. Missouri makes licensure a coverage requirement rather than just a credentialing one: § 376.1224 requires ABA to be supervised by a board-certified behavior analyst licensed under chapter 337, and RSMo 337.315 prohibits practising applied behavior analysis without an LBA or LaBA licence outside enumerated exceptions.^[1][2][3][4]

Aetna does not publish the rendering-versus-billing NPI convention for ABA. Missouri's mandate does supply one half of the answer for plans it reaches: reimbursement is directed to the autism service provider, or to the entity or group the supervising board-certified behavior analyst works for, and it expressly includes line-therapist services delivered under that supervision when they are in the treatment plan and medically necessary.^[3][1]

Ask the plan: Aetna provider services or Availity — confirm the rendering-versus-billing NPI convention and any required degree-level modifiers before the first claim.

Not published. Neither CPB 0554 nor CPB 0648 states whether 97155 and 97153 may be billed for the same clock time, and Aetna publishes no Missouri-specific ABA policy, form or supplement.^[1]

Ask the plan: Availity Essentials for the plan's reimbursement and claim-editing policies, or the provider-services number on the member's card.

Not published. CPB 0554 lists the covered ABA codes but sets no per-day unit ceiling, and Aetna publishes no ABA-specific MUE table. The operative ceiling is the precertification itself, which requires requested hours to be listed code by code — so the authorization, not a policy, is what bounds the day. CPB 0648 references intensive-intervention research norms of 25 hours a week, 12 months a year as clinical context rather than as a limit.^[1]

Ask the plan: The authorization letter itself, plus Availity Essentials for the plan's claim-editing and reimbursement policies. Ask whether CMS MUE limits are applied to ABA codes on this plan.

Not published. CPB 0554 and CPB 0648 set coverage criteria and precertification content; neither states what a session note must contain, who signs it, or by when.^[1]

Ask the plan: Aetna provider services or Availity — ask for the documentation standard applied at audit, and keep to the precertification form's own data elements in the meantime.

Not published as a payable-settings list. What CPB 0554 does make a submission requirement is adjacent and useful: the precertification form asks for concurrent services — PT, OT, speech and school services — plus how care is coordinated across them, so the school picture is data Aetna collects even though it publishes no school-versus-home rule.^[1]

Ask the plan: Benefits verification on the specific plan — ask which places of service are payable for ABA and whether school-based delivery is excluded.