Aetna ABA coverage in North Carolina: the intake guide.

Aetna puts no expiry on the ASD diagnosis itself, but it does run a 12-month clock on the functional evidence: medical necessity requires demonstration of functional impairment on a standardized scale of functioning in the past 12 months, at least one standard deviation below the population mean, or a significant risk of harm to self or others. Progress is then re-evaluated every six months.^[6]

A DSM-5 diagnosis of Autism Spectrum Disorder (ICD-10 F84.0, F84.3–F84.9) obtained by an appropriate provider — the medical necessity guide names a licensed psychologist or psychiatrist, a physician, or another health care professional qualified to diagnose mental health conditions within their scope of practice. CPB 0648 separately lists the professionals appropriate to an ASD evaluation: board certified behavior analyst, developmental pediatrician, neurologist, occupational therapist, physical therapist, primary care provider, psychiatrist, psychologist, and speech-language pathologist and audiologist.^[6][2]

CPB 0648 names the diagnostic instruments behind an ASD diagnosis: ADI-R, ADOS-2, CARS-2 and the Asperger Syndrome Diagnostic Scale. The ABA medical necessity guide then requires a standardized measure of functioning administered within the past 12 months — it gives the Vineland Adaptive Behavior Scales 3, the Adaptive Behavior Assessment Scale, VB-MAPP and ABLLS as examples — with impairment at least one standard deviation below the population mean or representing a significant risk of harm.^[2][6]

Aetna’s national ABA policies require no physician referral, order or prescription — the only prescription requirement in the medical necessity guide sits in its Maryland exhibit under COMAR 31.10.39, which does not reach NC. What Aetna requires nationally is precertification: its participating-provider behavioral health precertification list names all ten ABA codes — 97151, 97152, 97153, 97154, 97155, 97156, 97157, 97158, 0362T and 0373T — and ABA precertification runs on form GR-69017-4 through Availity or the number on the member ID card. For a fully insured North Carolina plan the state mandate adds an ordering requirement the carrier policies do not: adaptive behavior treatment must be ordered by a licensed physician or licensed psychologist. The mandate does not reach non-grandfathered individual and small-group plans, and self-funded ERISA plans sit outside state insurance law entirely — establish plan funding type before relying on it.^[7][6][8][3]

Aetna’s national ABA policies set no coverage age cap. The ABA medical necessity guide describes typical rather than limiting parameters: comprehensive ABA at 10–25 hours a week is typical for ages 0–7 over 1–2 years, while focused ABA at 1–20 hours a week is listed for all ages over 1–4 years. Where the member’s benefit plan or a state mandate carries an age term, that governs. North Carolina’s mandate permits coverage to be limited to individuals 18 or younger and capped at $40,000 a year (CPI-indexed from 2017) on fully insured plans — quantitative treatment limits of doubtful enforceability against large-group plans under MHPAEA. The mandate does not apply to non-grandfathered individual and small-group plans, and self-funded ERISA plans are exempt by preemption.^[6][3]

Ask the plan: Live benefits verification on the member ID — establish fully insured vs. self-funded ERISA, then the plan’s own age and benefit terms.

Aetna publishes no day counts of its own: its 2026 manual says "The timing of the review incorporates state, federal, CMS and NCQA requirements," and ABA services "require prior authorization" by calling the number on the member ID card. So the governing clock depends on funding. For a fully insured plan issued in North Carolina, G.S. 58-50-61(f) governs: "Prospective and concurrent determinations shall be communicated to the covered person's provider within three business days after the insurer obtains all necessary information" — the clock starts on complete information, not receipt, and the statute sets no separate faster clock for an urgent first decision (its expedited track is for appeals). In concurrent review "the insurer shall remain liable for health care services until the covered person has been notified of the noncertification." A self-funded employer plan sits outside state law and follows ERISA: a non-urgent pre-service decision "not later than 15 days after receipt of the claim by the plan", extendable once by up to 15 days; an urgent one within 72 hours; the clock starts when the request is filed, whether or not it is complete; and an urgent request to extend an approved course is decided within 24 hours if made "at least 24 hours prior to the expiration" of the current authorization.^[9][10][11]

Ask the plan: At benefits verification, ask whether the plan is fully insured (a policy issued in the state) or a self-funded employer (ERISA) plan — that decides which clock applies — then ask the carrier’s behavioral health precert line its expected ABA turnaround and how early it wants the reauth.

North Carolina’s COB rule for insured group plans (11 NCAC 12 .0514) sets the order: the plan covering the person as employee or subscriber pays before the plan covering them as a dependent; for a child of parents not separated, "the benefits of the Health Plan of the parent whose birthday falls earlier in a year are determined before those of the Health Plan of the parent whose birthday falls later" (same birthday: the longer-running plan first); for separated or divorced parents the custodial parent’s plan pays first, then the custodial parent’s spouse’s, then the non-custodial parent’s, unless a court decree the plan knows of assigns responsibility; Medicaid is expressly outside that rule. Self-funded plans follow their own plan document. Aetna says it coordinates "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" (it names the NAIC birthday and divorced-parent rules); on a secondary claim, send the primary payer’s paid/denied data in the 837 COB loops. Government coverage sorts itself by federal rule: a commercial plan pays before TRICARE, which is secondary to every other health plan but "In any double coverage situation involving Medicaid, CHAMPUS is always the primary payer"; CHAMPVA "is the last payer to OHI"; and Medicaid pays after all of them (42 CFR 433.139), so a child with commercial plus Medicaid needs this plan’s authorization and EOB before Medicaid will pay.^{[12][9][13][14][15][16]}

Ask the plan: Collect both parents’ plans, dates of birth, and any custody decree at intake; confirm primary/secondary with each carrier’s COB unit (and whether the plan is self-funded) before the first claim.

Not addressed. Neither CPB 0554, CPB 0648 nor the ABA medical necessity guide sets telehealth rules or place-of-service codes for ABA; the behavioral health provider manual covers telemedicine only as a member-facing Teladoc-style offering that self-insured plan sponsors may opt out of.^[1][6][8]

Ask the plan: Availity, or the precertification line on the member ID card — ask which ABA codes Aetna will pay via telehealth on this specific plan, and with which POS code and modifier.

Services must be provided directly or billed by licensed behavior analysts (in states with behavior analyst licensure laws), board-certified behavior analysts, or licensed psychologists where behavior analysis is within their scope, unless state mandates, plan documents or contracts require otherwise. Where a mandate, plan document or contract does allow authorization for services not directly provided by such a person, there must be supervision and direction of the unlicensed or non-certified provider in line with practice standards. Aetna publishes no numeric supervision ratio.^[6]

Aetna publishes no per-day or per-week unit ceiling for ABA. Authorized hours are set from documented symptom severity using the medical necessity guide’s severity assessment, against typical intensities of 10–25 hours a week for comprehensive and 1–20 hours a week for focused programmes — typical, not cap. Progress is evaluated every six months and coverage ends on the guide’s improvement thresholds. North Carolina’s mandate permits coverage to be limited to individuals 18 or younger and capped at $40,000 a year (CPI-indexed from 2017) on fully insured plans — quantitative treatment limits of doubtful enforceability against large-group plans under MHPAEA. The mandate does not apply to non-grandfathered individual and small-group plans, and self-funded ERISA plans are exempt by preemption.^[6][3]

Outpatient ABA is setting-agnostic in Aetna’s guide, which notes only that where ABA is delivered in an inpatient, residential or partial hospitalization setting the medical necessity criteria for that level of care apply and no separate ABA authorization is needed. The guide expects collaboration and coordination with existing providers and the school district as applicable, and a treatment plan that tapers higher intensities toward supports from other sources such as school. Aetna’s statement that it will not deny coverage solely because services are in a child’s educational setting is a Maryland provision, not national, and Aetna is not required to provide services under an IEP or an IDEA obligation of a public school.^[6]

Services must be provided directly or billed by the appropriately licensed provider: licensed behavior analysts in states with licensure laws, board-certified behavior analysts, or licensed psychologists where behavior analysis is within their scope — unless state mandates, plan documents or contracts require otherwise.^[6]

Not addressed in Aetna’s published ABA policies — CPB 0554, CPB 0648 and the ABA medical necessity guide are silent on billing 97153 and 97155 for the same clock time.^[1][6]

Ask the plan: Aetna provider services / the participating-provider agreement, or a written coding determination from Aetna Behavioral Health (BACABACases@Aetna.com).

Not addressed. Aetna’s published ABA policies set treatment-plan content requirements — defined target behaviors, baseline measures, quantifiable progress criteria, generalization strategies, transition and titration planning — but do not specify who must sign a session note or by when.^[6][8]

Ask the plan: The participating-provider agreement and the Aetna Behavioral Health Provider Manual section on documentation and record retention.