Aetna ABA Prior Authorization: Complete Guide for 2026
Step-by-step walkthrough of Aetna's prior authorization process for ABA services, including required documentation, submission timelines, and common denial reasons.
9 min readFeb 15, 2026
Authoritative guides on ABA prior authorization, CPT coding, Medicaid policy, denial management, and practice compliance — written by certified ABA billing specialists.
27 articles
Step-by-step walkthrough of Aetna's prior authorization process for ABA services, including required documentation, submission timelines, and common denial reasons.
Anthem is the only major commercial payor that tracks ABA authorized units on a weekly basis. Here's exactly what that means, why it causes denials, and how to manage it.
Cigna updated its ABA clinical payment and coding policy in late 2025. Here's what changed, what stayed the same, and what your billing team needs to know.
Everything you need to know about the eight ABA CPT codes — what each code covers, who can bill it, modifier requirements, and common billing errors.
A practical guide to ABA billing modifiers — which modifier goes with which CPT code, which payors require what, and how modifier errors cause denials.
The telehealth flexibilities introduced during COVID-19 have largely been made permanent for ABA. Here's the current state of telehealth coverage across major commercial payors and state Medicaid programs.
Florida's AHCA covers ABA services under a specific benefit structure with unique documentation and authorization requirements. This guide covers everything Florida ABA practices need to know.
Texas Medicaid (TMHP) has a complex ABA billing structure with different rules for STAR, STAR Kids, and STAR+PLUS. Here's what Texas ABA practices need to know.
A comprehensive comparison of ABA coverage requirements across all 50 state Medicaid programs, including authorization duration, documentation requirements, and key differences.
Based on data from ABA practices across the country, these are the most common reasons ABA claims are denied — and the specific steps to prevent each one.
A step-by-step guide to writing effective ABA prior authorization and claim denial appeals, including a medical necessity letter template used by successful ABA practices.
A comprehensive guide to the ABA revenue cycle — the complete workflow from intake through payment, with benchmarks for each stage and common bottlenecks to avoid.
A practical guide to credentialing your ABA practice with commercial payors and Medicaid programs, including timelines, required documents, and common delays.
A structured 30-day training plan for new ABA billing staff, covering the core competencies, common mistakes to avoid, and the resources every ABA biller needs.
A practical guide to conducting an internal ABA billing compliance audit — what to look for, how to document findings, and how to correct identified issues.
A practical HIPAA compliance guide for ABA practices — the required safeguards, common violations, and how to build a compliance program that works.
UHC routes ABA behavioral health authorizations through Optum. Here's the current process, documentation requirements, and what changed with the 2026 policy update.
Humana's ABA authorization process through its behavioral health division. Documentation requirements, timelines, and how to avoid the most common Humana denials.
The correct ICD-10 codes for autism spectrum disorder, how to choose the right code for each client, and how diagnosis code errors cause ABA claim denials.
A comparison of BACB supervision requirements and payor supervision requirements for ABA billing — and what happens when they conflict.
EVV is now required for home-based ABA services in most states. Here's what EVV is, which states require it, and how to implement it in your practice.
Industry benchmarks for ABA claim denial rates, days in AR, and clean claim rates — and what the best-performing practices do differently.
The correct place of service codes for ABA services delivered in different settings, and how POS code errors cause claim denials.
Concurrent review is the payor's check-in on whether ABA services are still medically necessary. Here's what triggers it, what payors look for, and how to prepare.
The billing tasks that must be completed at intake to prevent revenue leakage — eligibility verification, benefit confirmation, authorization submission, and more.
A guide to billing ABA services for military families covered by TRICARE and veteran families covered by CHAMPVA, including the Autism Care Demonstration program.
A comparison of the leading ABA practice management platforms — CentralReach, Raven, Theralytics, and others — focusing on billing and authorization management features.