UnitedHealthcare / Optum ABA coverage in Arizona: the intake guide.

Optum's Supplemental Clinical Criteria set no recency clock on the ASD diagnosis. What they require instead is current assessment: the comprehensive diagnostic evaluation and functional assessment "form the basis for the treatment plan," baseline skills and norm-referenced measures must reflect the individual's "specific and current abilities," and continued coverage rides on documentation of movement from baseline at each 4–6 month review.^[1]

"A valid diagnosis of ASD (or other applicable diagnosis as required by governing laws) must be issued by a state licensed physician, psychologist, or other state licensed clinician qualified to make such diagnosis according to the diagnostic criteria based on the DSM-5-TR." The diagnosing clinician must also confirm and document the severity level.^[1]

The DSM-5-TR diagnosis and severity level must be "confirmed and documented by the diagnosing clinician using at least one clinically validated tool," on a three-tier list: first-level screening (ABC, CHAT/M-CHAT, CSBS-DP-IT Checklist, ASQ, AQ, CAST), second-level screening (CARS/CARS-2, RITA-T, STAT) and formal diagnostic tools used in a comprehensive evaluation (ADI-R, ADOS/ADOS-2, DISCO). Treatment intensity must then be set against at least one validated measurement tool — ATEC, VB-MAPP, ABLLS/ABLLS-R, AFLS, PEAK, SSIS, RBS-R, SRS, VABS or CFQL-2.^[1]

No physician referral or order is required. The front door is Optum's two-step authorization on Provider Express — "Prior authorization is required for ABA (unless otherwise specified or mandated by contract or law)" — with the diagnosis, the credentialed ABA provider and the assessment package standing in for a referral.^[1]

Steven's Law now carries no explicit age limit: SB 1590 (signed May 7, 2025) struck the dollar-cap subsection from all four sections of the mandate, and the age tiers — under 9, and 9 through 16 — lived inside that subsection. Optum's own state-mandate entry describes the change as repealing "the maximum benefit limitations for behavioral therapy coverage for eligible persons who are 16 years old and younger." The carrier's national ABA policy adds no age bound of its own, so age comes from the benefit document, not the statute. Optum operationalises this in its own ABA State Mandates supplement, which carries an explicit Arizona Commercial entry.^[3][4][1][2]

Ask the plan: Benefits verification on the specific plan — funding type first, then the ABA benefit terms.

UHC’s 2026 commercial administrative guide says standard requests take "up to 15 calendar days" and expedited "72 hours", and asks for requests "at least 15 calendar days in advance, if possible, but must be submitted at least 5 business days before the planned service date"; ABA itself is authorized by Optum Behavioral Health, whose network manual publishes no prospective decision clock (retrospective requests are decided within 30 calendar days). So the governing clock depends on funding. For a fully insured plan issued in Arizona, A.R.S. § 20-3404 governs: urgent requests "not later than five days after the receipt of all necessary information", non-urgent "not later than fourteen days after receipt of all necessary information", with the same five/fourteen days again after the provider completes an incomplete request — and "A prior authorization request is deemed granted if a health care services plan or its utilization review agent fails to comply with the deadlines." A granted authorization cannot be rescinded after services are rendered in good faith, absent fraud. 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.^{[10][11][12][13]}

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.

Arizona’s COB rule for group plans (A.A.C. R20-6-214) sets the order: the plan covering the person other than as a dependent pays first; for a dependent child, "The plan of a parent whose birthday occurs earlier in a calendar year shall cover a dependent child before" the other parent’s plan (month and day only); for separated or divorced parents, the custodial parent’s plan, then the custodial parent’s spouse’s, then the non-custodial parent’s, unless a court decree the plan knows of says otherwise. Self-funded plans follow their own plan document. UHC says "COB is administered according to the member's benefit plan and in accordance with law"; Optum’s network manual tells providers to determine other coverage, "bill the primary insurance carrier first, then notify Optum of your findings," and says it applies industry-standard COB rules and state law. 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.^{[14][10][11][15][16][17]}

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.

Optum publishes no ABA telehealth code list in the Supplemental Clinical Criteria; it points providers to CASP's Practice Parameters for Telehealth-Implementation of Applied Behavior Analysis, Second Edition, which it describes as a resource for ABA "delivered via telehealth in a broad range of clinical settings (e.g., home, clinic, school)" and as a supplement to, not a replacement for, in-person delivery.^[1]

Ask the plan: Optum/UnitedHealthcare provider services and the plan's telehealth reimbursement policy — confirm which ABA codes are payable remotely and with which POS before scheduling.

Two numbers, from two documents. Clinically, "consistent with CASP standards of care, direct case supervision is required 1–2 hours for every 10 hours of direct treatment per week," with technicians under the supervision of a BCBA or licensed behavioral health clinician and parents discouraged from serving as their own child's RBT. On the claim side, the commercial reimbursement policy polices the boundary rather than a ratio: "CPT codes 97153 and 97155 may not be billed for technician training," and 97155 "should be reported only for services where the QHP is either engaged directly with the patient or is directing a technician in implementing a modified protocol with the patient" — treatment planning is indirect and not separately reimbursable.^[1][9]

Yes, with a single-provider exclusion. "Can I report 97153 or 97154 with 97155 concurrently? A. Yes, as long as the criteria in the descriptors of both codes are met. A single QHP may not report 97153 or 97154 with 97155 concurrently." So the concurrency has to be two people — technician on 97153, analyst on 97155 directing them with the patient present. Separately, 97155 and 97156 may both pay on the same date of service only if the services are separate, distinct and clearly documented in the progress notes.^[9]

Optum publishes its own per-day table on top of CMS MUEs — maximum frequency per day: 97151 32 units (8 hrs), 97152 16 (4 hrs), 97153 32 (8 hrs), 97154 18 (4.5 hrs), 97155 24 (6 hrs), 97156 16 (4 hrs), 97157 16 (4 hrs), 97158 16 (4 hrs), 0362T 16 (4 hrs), 0373T 32 (8 hrs). MUEs otherwise apply per CMS guidance, and billing above 32 units/day of 97153 "may be subject to non-reimbursement or recovery."^[9]

One provider-level modifier per line, matching whoever actually rendered the service: HM = Registered Behavior Technician (less than bachelor's level), HN = BCaBA (bachelor's level), HO = BCBA or master's-level licensed clinician, HP = BCBA-D or doctoral-level licensed clinician. A billable ABA-supervisor service is billed with the applicable CPT code plus HO. Stacking level modifiers is a denial risk: "Billing multiple provider-level modifiers (HN, HM, HO, HP) on the same service line same service and same DOS is not appropriate and may result in claim denial."^[9]

No POS code list is published. The clinical criteria draw the school line instead: ABA is not covered for "services that are not ABA therapy, such as 1:1 aid delivered simultaneously during classroom instruction, or services covered under the Individuals with Disabilities Education Act (IDEA)," while "school ABA services do allow for coordination of services and would cover services such as teacher training, meetings with school personnel, and observations in the school setting."^[1]

Ask the plan: UnitedHealthcare/Optum provider services and the member's benefit document.

No signature rule is published, but the documentation burden is explicit where money turns on it: services billed on the same date must be "separate, distinct, and clearly documented in the progress notes," and if documentation does not clearly separate them the claim may be denied. Who signs, and within what window, is not stated.^[9]

Blocked on: The UnitedHealthcare/Optum provider manual and your participation agreement's documentation clause.