Applied Behavior Analysis (ABA)

97153 — Adaptive Behavior Treatment by Protocol

Direct ABA therapy provided by a behavior technician (RBT) following a treatment protocol designed by a BCBA. This is the primary code for 1:1 direct ABA therapy services. The technician implements behavior intervention plans, runs skill acquisition programs, and collects data.

Time Requirements

Billed per 15-minute unit. Typical sessions range from 1-4 hours (4-16 units). Weekly hours are determined by the treatment plan (commonly 10-40 hours/week for comprehensive ABA).

Modifiers

CodeDescription
97Habilitative services.
XESeparate encounter — used if multiple services on the same day.

When to Use

  • Direct 1:1 ABA therapy sessions conducted by a technician
  • Implementation of behavior intervention plans (BIPs)
  • Skill acquisition program implementation (DTT, NET, etc.)
  • Data collection during direct therapy

When Not to Use

  • Group ABA therapy (2+ clients) — use 97154
  • BCBA-directed therapy or supervision — use 97155
  • Assessment services — use 97151 or 97152
  • When services are not following a BCBA-designed protocol

Common Denial Reasons

  • No active BCBA treatment plan on file
  • Units billed exceed authorized hours
  • Technician credentials (RBT certification) not on file with payer
  • Overlap with other services billed on the same time period
  • Session data sheets not maintained or available for audit

Payer Notes

Prior authorization is virtually always required. Authorized hours vary dramatically by payer and clinical presentation (10-40+ hours/week). Many payers require treatment plans to be updated every 6 months. Parent/caregiver involvement documentation is increasingly required.

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