For an intake team in Illinois, an Aetna commercial card means three layers: Aetna’s national ABA policy, Illinois’s autism mandate in the Insurance Code, and the plan’s funding type, which decides whether the mandate applies. A child on Illinois Medicaid with Aetna is a different product, Aetna Better Health of Illinois, with its own guide.
Aetna covers ABA for autism spectrum disorder and considers it “experimental, investigational, or unproven for all other non-ASD indications” (CPB 0554). Its behavioral health precertification list (effective August 1, 2024) names all ten ABA codes, 97151 through 97158, 0362T and 0373T, and most requests go through Availity. The medical necessity guide requires a DSM-5 ASD diagnosis, functional impairment “on a standardized scale of functioning in the past 12 months” at least one standard deviation below the mean (or significant risk of harm), and authorizes protocol modification “at 1 to 2 hours per 10 hours of treatment by protocol.” Its only state exhibit is Maryland’s, so the national criteria apply unchanged in Illinois. Aetna’s Illinois Medicaid plan is Aetna Better Health of Illinois.[2][5][4][23]
Reauthorization: Aetna’s ABA medical necessity guide says “A member's progress is to be evaluated every six months,” and continued coverage needs a treatment plan with “frequency, rate, symptom intensity or duration, or other objective measures of baseline levels” recorded and “quantifiable criteria for progress,” plus documentation that target behaviors improved or, if not, that treatment was modified. It does not require graphs as such; objective baseline-to-current data is what the reviewer looks for. Claim filing: the Aetna provider toolkit (6/26) we read states no timely filing limit, so the limit is the one in your Aetna participation agreement. For fully insured Illinois policies the Insurance Code sets the payment clock: “All claims and indemnities payable under the terms of a policy of accident and health insurance shall be paid within 30 days following receipt by the insurer of due proof of loss,” with 9% annual interest after the 30th day, and the insurer must tell the insured or assignee within 30 days if documentation is missing (215 ILCS 5/357.9). Self-funded ERISA plans are outside it. No weekly submission cutoff or check-run day is published.[4][7][1]
Illinois’s autism mandate is Section 356z.14 of the Illinois Insurance Code (215 ILCS 5/356z.14). Group and individual policies and managed care plans issued or renewed after December 12, 2008 “must provide individuals under 21 years of age coverage for the diagnosis of autism spectrum disorders and for the treatment of autism spectrum disorders.” Coverage “shall be subject to a maximum benefit of $36,000 per year but shall not be subject to any limits on the number of visits to a service provider,” and “The Director of Insurance shall, on an annual basis, adjust the maximum benefit for inflation” using the medical care CPI; we did not find the Department’s current adjusted figure, so get it from the plan. Cost sharing may apply only as it does to other medical services, and benefits “may not be subject to dollar limits, deductibles, copayments, or coinsurance provisions that are less favorable to the insured” than for physical illness. Treatment explicitly includes “applied behavior analysis,” prescribed, provided or ordered by a physician “or (B) a certified, registered, or licensed health care professional with expertise in treating effects of autism spectrum disorders when the care is determined to be medically necessary and ordered by a physician licensed to practice medicine in all its branches.” The diagnosis must be prescribed, performed or ordered by a physician licensed in all branches or “a licensed clinical psychologist with expertise in diagnosing autism spectrum disorders”; P.A. 104-561 adds a licensed speech-language pathologist with that expertise for children under 3, effective January 1, 2028. The insurer may ask for records showing medical necessity and progress, and a treatment plan (diagnosis, treatment by type, frequency, duration, goals, update schedule), but subsection (f) adds: “Nothing in this subsection supersedes the prohibition on prior authorization for mental health treatment under subsection (w) of Section 370c.” Medical-necessity decisions must be made the same way as for other illnesses, and an appeal challenge is reasonable only if the review includes a physician with current ASD treatment expertise. Subsection (e-5) bars denial “solely because of the location wherein the clinically appropriate services are provided.” The Department of Insurance has enforced that last point: Company Bulletin 2024-17 (December 4, 2024) reminds every company writing accident and health insurance and managed care plans that Public Act 102-0322, in effect since January 1, 2022, bars an insurer from denying “otherwise covered services … solely because of the location wherein the clinically appropriate services are provided,” and that for autism services “such as applied behavior analysis” sites “include non-school, non-home, or non-provider locations,” private or public. It adds that “An issuer cannot apply medical necessity criteria that contradict a statutory requirement,” that criteria for mental health conditions “including autism spectrum disorder, must be consistent with generally accepted standards of care, including with respect to setting or site of care” (215 ILCS 5/370c(h)-(i), (k)), and that members denied for medical necessity keep appeal rights under the Managed Care Reform and Patient Rights Act and the Health Carrier External Review Act. Separately, 370c(w), added by Public Act 104-0028 from January 1, 2026, says “No policy shall require prior authorization for outpatient or partial hospitalization services for treatment of mental, emotional, or nervous disorders or conditions” by licensed, certified or legally authorized providers; concurrent and retrospective review remain allowed, and a commercial insurer may require notice within “2 business days after the initiation of the covered person’s treatment,” with no concurrent review of services before that deadline. 370c(w) does not name ABA, and carriers still list ABA codes for authorization, so whether a fully insured plan may prior-authorize ABA in 2026 is a question to put to the plan and, if needed, the Department of Insurance. Like every state mandate, it reaches fully insured plans; self-funded employer plans answer to ERISA, and Evernorth’s Illinois addendum, for example, says it does “not apply with regard to Covered Services rendered to Participants covered under self-funded plans.”[8][9][10][11][12][24]
Illinois licenses behavior analysts. IDFPR lists two professions under the Behavior Analyst Licensing Act (225 ILCS 6), the Licensed Behavior Analyst and the Licensed Assistant Behavior Analyst, and says the Department “commenced licensing behavior analysts and assistant behavior analysts on January 15, 2025.” It gave applicants a grace period: IDFPR “will not begin enforcement actions for unlicensed practices provided by Behavior Analysts and Assistant Behavior Analysts until Monday, April 21, 2025,” so that date has passed and a BCBA practicing in Illinois now needs the Illinois license. A second deadline is still ahead. IDFPR quotes Section 150 of the Act: beginning 24 months after licensing began, no business may offer behavior analysis services “unless every member, partner, shareholder, director, officer, holder of any other ownership interest, agent, and employee who renders applied behavior analysis services holds a currently valid license,” and it reads that as: “By or before January 15, 2027 anyone who is not licensed as a behavior analyst or assistant behavior analyst … and who currently owns a business providing applied behavior analysis services must divest from the business.” The statute is blunter than IDFPR’s notice: Section 150 covers “every member, partner, shareholder, director, officer, holder of any other ownership interest, agent, and employee who renders applied behavior analysis services,” “Notwithstanding” the Section 20 exclusion for people implementing a plan under a licensed behavior analyst’s supervision, so ask IDFPR how it applies to RBT employees after January 15, 2027. The BACB’s licensure table lists Illinois (law enacted 2022) with IDFPR as the board. Out-of-state BCBAs and telehealth: no. Section 20 of the Act says an individual “shall not engage in the practice of applied behavior analysis unless licensed under this Act or covered by an exemption,” and its exemption list (family caregivers, staff implementing a plan under a licensed behavior analyst, listed licensed professions such as clinical psychologists, LCSWs, LCPCs, SLPs and OTs acting within their training, students and fellows, school-endorsed staff, QIDPs, DHS-designated providers, and people practicing on Medicaid when the Act took effect while working toward licensure) contains nothing for a behavior analyst licensed in another state. The Telehealth Act closes the remote route: “A health care professional treating a patient located in this State through telehealth services must be licensed or authorized to practice in Illinois” (225 ILCS 150/10). So a BCBA licensed elsewhere needs the Illinois license to treat or supervise a client located in Illinois, in person or by telehealth. For commercial credentialing this means the carrier will expect the Illinois license number as well as BACB certification. Aetna’s network criteria say “All BCBAs, BCaBAs and paraprofessionals must meet state requirements,” and its provider manual tells telehealth providers to “ensure that they have the proper licensure based on state requirements.”[13][14][25][15][16][6][7]
Aetna publishes no ABA rate table. Its provider manual (6/26) treats payment as a contract term: where a provider has both an intermediary contract and a direct agreement, “your direct Aetna rates will apply,” and a member whose benefits run out cannot be charged “more than the contracted rate.” Get the rates from your Aetna agreement. For a public benchmark, Illinois Medicaid’s ABS fee schedule (updated 05/14/2026) pays 97153 at $13.00 and 97155 at $20.39 per 15 minutes; commercial contracts are negotiated separately.[7][18]
The questions that decide whether a family can start with Aetna in Illinois, and what they have to bring. Each maps onto something intake should ask on the first call.
No expiry on the ASD diagnosis itself, but medical necessity requires functional impairment on a standardized scale administered in the past 12 months (at least one standard deviation below the mean) or a significant risk of harm.[4]
A DSM-5 ASD diagnosis “obtained by an appropriate provider (i.e. licensed psychologist/psychiatrist, physician or other health care professional qualified to diagnose mental health conditions within their scope of practice).” For fully insured Illinois plans, 356z.14 defines the diagnosis as tests or evaluations “prescribed, performed, or ordered by (A) a physician licensed to practice medicine in all its branches or (B) a licensed clinical psychologist with expertise in diagnosing autism spectrum disorders” (a licensed speech-language pathologist with that expertise for children under 3 is added from January 1, 2028 by P.A. 104-561).[8][4]
CPB 0648 names ADI-R, ADOS-2 and CARS-2 among the tools for establishing the diagnosis. The ABA guide requires a standardized functional measure from the past 12 months (Vineland-3, ABAS, VB-MAPP or ABLLS as examples).[3][4]
Aetna’s national ABA policies require no physician referral; what they require is precertification of all ten ABA codes. For fully insured Illinois plans, 215 ILCS 5/356z.14 covers ABA as treatment “ordered by a physician licensed to practice medicine in all its branches” when delivered by a certified, registered or licensed professional, so keep a physician order on file; the Department of Insurance has also told carriers they may not deny covered ABA “solely because of the location” of care (Company Bulletin 2024-17). Self-funded ERISA plans sit outside state insurance law.[5][4][12]
Aetna’s national ABA guide sets no age cap; its age ranges are typical, not limiting. For fully insured Illinois plans, 215 ILCS 5/356z.14 mandates autism coverage for “individuals under 21 years of age,” subject to a $36,000-a-year maximum that the Director of Insurance adjusts annually for medical inflation, with no visit limits; the plan may cover older members, and the current adjusted dollar figure should be confirmed with the plan. Self-funded ERISA plans are outside the statute.[4][8]
Ask the plan: Live benefits verification on the member ID: establish fully insured vs. self-funded ERISA, then the plan’s own age terms.
Aetna’s provider manual (6/26): Aetna Behavioral Health “offers telehealth services to all commercial fully insured members and to all commercial self-insured plan sponsors, unless those self-insured plan sponsors opt out,” and providers “must act within the scope of their license and ensure that they have the proper licensure based on state requirements.” No current Aetna ABA telehealth code list was read this run, and Illinois’s commercial telehealth statute could not be retrieved.[7]
Ask the plan: Availity or the precertification line on the card: ask whether the plan is self-funded and opted out of telehealth, and which ABA codes, POS and modifier Aetna pays by telehealth.
Depends on how the plan is funded. Self-funded employer (ERISA) plans follow 29 CFR 2560.503-1: pre-service decisions “not later than 15 days after receipt of the claim,” one 15-day extension, urgent care within 72 hours. For fully insured Illinois plans, 215 ILCS 5/370c(w) (Public Act 104-0028, from January 1, 2026) bars prior authorization of outpatient mental health treatment and lets the insurer set a notification deadline of up to 2 business days after treatment starts, with no concurrent review of services before that deadline; Illinois’s general prior-authorization decision deadlines were not read this run. Aetna publishes no Illinois-specific ABA turnaround or reauthorization lead time in the documents read.[17][11][10]
Ask the plan: At benefits verification ask whether the plan is fully insured (Illinois-regulated) or self-funded (ERISA), and what precertification turnaround and reauthorization lead time Aetna expects.
Illinois’s group coordination-of-benefits rule could not be retrieved this run, so the order between two parents’ plans is not stated here; ask the plan. What is certain is the order against public coverage: if the child also has Illinois Medicaid, Aetna pays first. HFS is “by federal and State Law, the payer of last resort,” and claims must be adjudicated by all liable third parties before HFS considers them (42 CFR 433.139). TRICARE pays after this plan (10 U.S.C. 1079(i)(1)); CHAMPVA is the last payer (38 CFR 17.270).[19][20][21][22]
Ask the plan: Ask Aetna at benefits verification for the member’s coordination-of-benefits order between two parents’ plans, and record every other coverage the child has.
Coverage decides whether Aetna in Illinois pays. These decide whether the claim survives: how sessions must be staffed and supervised, what may be billed concurrently, the per-day ceilings, who signs the note, where the service is payable, and whose NPI the claim goes out under.
Aetna’s Network Participation Criteria (5/26): services “must be provided directly or supervised by individuals licensed by the state or certified by the Behavior Analyst Certification Board,” supervised staff may be a BCaBA “or a paraprofessional,” and “A minimum of one hour of face-to-face supervision is required of the unlicensed or noncertified paraprofessional by a BCBA or licensed psychologist (or behavioral health professional) for each 10 hours of applied behavior analysis,” plus the supervisor “onsite with the child at least one hour a month.” “All BCBAs, BCaBAs and paraprofessionals must meet state requirements” — in Illinois that includes IDFPR licensure.[6][4][13]
No per-day or per-week cap. The guide lists typical intensities of 10–25 hours a week for comprehensive and 1–20 for focused programs (typical, not caps) and ties authorized hours to documented severity; progress is evaluated every six months.[4]
Aetna’s guide applies the ABA criteria to outpatient care in any setting, and inpatient, residential or partial hospitalization use that level of care’s criteria. For fully insured Illinois plans, the Department of Insurance has told carriers they may not deny covered ABA “solely because of the location” of care and that ABA sites “include non-school, non-home, or non-provider locations” (Company Bulletin 2024-17).[4][12]
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 in scope, unless mandates, plan documents or contracts say otherwise. Illinois licenses behavior analysts, so the IDFPR-licensed behavior analyst is the billing credential.[4][13]
Not addressed in Aetna’s published ABA policies (CPB 0554, the medical necessity guide).[2][4]
Ask the plan: Aetna provider services, the participating-provider agreement, or a written coding determination from Aetna Behavioral Health.
Not addressed. Aetna sets treatment-plan content requirements but not who signs a session note or by when.[4]
Ask the plan: The participating-provider agreement and the Aetna Behavioral Health provider manual section on documentation.
For fully insured Illinois policies, 215 ILCS 5/357.9 requires payment within 30 days of due proof of loss, with 9% interest after that. Self-funded plans are outside the statute; the timely filing limit is in your Aetna agreement.
Yes, under its national ABA guide for ASD, with Illinois’s autism mandate (215 ILCS 5/356z.14) layered on for fully insured plans. Self-funded employer plans follow their own documents.
Aetna’s national precertification list includes 97151 and every other ABA code. But for fully insured Illinois policies, 215 ILCS 5/370c(w) has barred prior authorization of outpatient mental health treatment since January 1, 2026 (notification plus concurrent review is allowed), and the statute does not name ABA, so ask Aetna how it handles ABA on this plan. Self-funded plans follow their own rules.
Illinois has licensed behavior analysts since January 15, 2025 (enforcement from April 21, 2025), and Aetna requires staff to meet state requirements, so yes: plan on the IDFPR license as well as BACB certification.
For fully insured Illinois plans, the Department of Insurance has told carriers they may not deny covered ABA solely because of where it is delivered, including non-school, non-home and non-provider settings (Company Bulletin 2024-17). Self-funded plans follow their own terms.
Payer policies change frequently and vary by plan, state, and funding type. This guide was compiled from the sources above and last reviewed October 2026; it is general information, not billing, legal, or clinical advice. Always verify current requirements against the payer's live policy and a benefits check for the specific member.
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