ABA CPT codes, 97151 to 97158.
The Category I CPT codes for adaptive behavior services fall into four groups — assessment, direct treatment, protocol modification, and caregiver guidance. Each page below is the structured reference for one code: who bills it, the unit structure, what the documentation has to show, and the denial and downcoding reasons specific to that code. Every page is reviewed against current code descriptors and common payer requirements.
Assessment
- CPT 97151
Behavior identification assessment
The BCBA's assessment and treatment-plan development time — record review, observation, interviews, and plan authoring.
Documentation reference - CPT 97152
Supporting assessment by technician
Technician-administered assessment procedures, delivered under the direction of the BCBA who owns the assessment.
Documentation reference
Direct treatment
- CPT 97153
Adaptive behavior treatment by protocol
Technician-delivered 1:1 ABA treatment implemented under a written protocol — the most-billed ABA code.
Documentation reference - CPT 97154
Group adaptive behavior treatment by protocol
Technician-delivered ABA treatment by protocol in a group of two or more clients.
Documentation reference
Protocol modification
- CPT 97155
Adaptive behavior treatment with protocol modification
The BCBA's protocol modification time — adjusting the treatment plan, often while directing a technician.
Documentation reference - CPT 97158
Group adaptive behavior treatment with protocol modification
The BCBA modifying treatment protocols in a group of two or more clients.
Documentation reference
Caregiver & family guidance
- CPT 97156
Family adaptive behavior treatment guidance
Caregiver and family training — the BCBA or BCaBA guiding caregivers to implement treatment strategies.
Documentation reference - CPT 97157
Multiple-family group adaptive behavior treatment guidance
Caregiver training delivered to multiple families in a group format, without the patients present.
Documentation reference