CPT 97155 — Adaptive behavior treatment with protocol modification
Adaptive behavior treatment with protocol modification, administered by a physician or other qualified health care professional, which may include simultaneous direction of a technician, billed in 15-minute units.
- Billed by
- A BCBA or other QHP. The defining activity is clinical decision-making to modify the protocol — not direct implementation.
- Unit structure
- Time-based, billed in 15-minute units.
- Patient present
- Typically face-to-face; the BCBA may be directing a technician simultaneously.
The service behind the code.
- Modifying treatment targets, procedures, prompting strategies, or reinforcement schedules
- Real-time clinical decision-making based on the client's data and response
- Simultaneous direction of a technician delivering the modified protocol
- Adjusting the protocol following observation of the client
What the note has to show.
- A clear before/after of the protocol — what stood, and what was changed
- The specific modification made (target, procedure, prompt, or schedule)
- The clinical rationale: the data, response, or barrier that drove the change
- How the client responded to the modified protocol and what will be monitored next
- Start and end times supporting the units billed
Why 97155 claims get rejected.
- The note reads like a 97153 direct-service note with no documented modification
- A modification is described but with no clinical rationale behind it
- 97155 and 97153 billed concurrently in ways the payer doesn't allow
- Time billed as 97155 that was actually direct implementation
Clinically reviewed by BxScribe Clinical Team
BxScribe's clinical content is reviewed against current BACB ethics and documentation standards, CPT code descriptors, and common commercial and Medicaid payer requirements before publication. Last reviewed May 1, 2026. This page is educational and does not replace your payer contract or clinical judgment.
Draft 97155 notes faster.
- Billing
CPT 97155 protocol modification note documentation
Document what was modified and why, so 97155 protocol modification isn't downcoded to 97153.
- Supervision
BCBA supervision documentation software
Document fidelity checks, RBT performance, and program changes — and review team notes before sign-off.
Codes often billed alongside 97155.
Terms behind this code.
Go deeper.
- Billing
ABA billing codes (97153, 97155, 97156) explained
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- Clinical documentation
How to write an ABA session note (RBT + BCBA examples)
Session notes are where your clinical work becomes billable. Here is every element payers expect, with worked RBT and BCBA examples.
CPT 97155 questions.
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