The most common CPT billing codes for ABA therapy in 2026 are part of a standardized set of adaptive behavior treatment codes. These codes identify the specific type of service provided, the duration of the session, and the professional level of the provider.

The primary codes used include:

• 97151: Used for the initial assessment and treatment planning performed by a qualified professional (such as a BCBA) to evaluate a child’s needs.
• 97153: The most frequent code, representing direct 1-on-1 therapy. It is reported for each 15-minute unit of hands-on therapy provided by a Registered Behavior Technician (RBT).
• 97155: Covers protocol modification where a supervising BCBA reviews progress and updates the treatment plan to ensure the intervention remains effective.
• 97156: Used for family or caregiver guidance, where a BCBA coaches parents on strategies to support the child’s progress at home.
• 0373T: Modern code for adaptive behavior treatment delivered via telehealth, allowing for remote supervision or parent coaching.
• 97157: Used for group family/caregiver adaptive behavior treatment guidance.

In addition to these codes, modifiers (such as HN, HM, or HQ) are used to clarify who delivered the service and whether it was a group or individual session, which is essential for accurate insurance reimbursement.

• ABA CPT Codes 2026 in Kansas City: Expert Billing Solutions