Billing

Preparing for the 2027 ABA CPT Code Changes

By the Remote ABA Staffing team · Published October 27, 2026 · 8 min read

Revised ABA codes take effect January 1, 2027. A practical readiness plan for billing, authorization and scheduling teams.

In September 2025, the American Medical Association’s CPT Editorial Panel approved a code-change application submitted by the ABA Coding Coalition. The changes take effect on January 1, 2027. For ABA providers, they touch billing, authorizations, scheduling and documentation at the same time, so preparation needs to start before the new year.

What was approved

• Six new codes for adaptive behavior services.
• Revised descriptors for the existing codes 97151 through 97158.
• Revised guidelines for the code family.
• Deletion of the Category III codes 0362T and 0373T.

Final code numbers and descriptor language are published in the AMA’s 2027 CPT code set. Use the published code set and each payer’s implementation guidance as your source of truth rather than summaries.

Why it matters operationally

A code change is not just a billing update. Authorizations approved in 2026 may run into 2027. Payer fee schedules, system code tables, session templates and modifier rules all need to line up on the same date. If any piece lags, claims deny.

A readiness plan

1. Inventory where codes live

List every place the current codes appear: practice-management service codes, session-note templates, authorization records, fee schedules, contracts, reports and staff job aids.

2. Watch payer communications

Assign one person to track bulletins from each major payer and your state Medicaid program. Record each payer’s effective date, crosswalk guidance and whether existing authorizations will be converted or need to be resubmitted.

3. Plan the authorization crosswalk

Identify every active authorization with an end date after December 31, 2026. For each payer, confirm how those units carry over. This is the step most likely to cause interrupted services if it is missed.

4. Update systems before go-live

Work with your software vendor on the timing of code-table updates. Build and test new service codes and rates in advance, and schedule the switch-over so no 2026 dates of service are billed with 2027 codes, or the reverse.

5. Review contracts and fee schedules

New or revised codes need rates. Check whether your payer contracts address code changes, and start conversations early where they do not.

6. Train the team

Billing, authorization, scheduling and clinical staff each need a short, role-specific briefing. Clinicians need to know about documentation changes; schedulers need to know about any change in how services are grouped.

7. Watch the first claims closely

For January 2027 dates of service, review early remittances daily. Catch systematic denials in the first week, not the second month.

Staffing for the transition

The months around a code change are a poor time to be short an authorization coordinator or biller. If your team is stretched, a temporary or project-based specialist can carry the authorization crosswalk or the January denial review so your core team keeps day-to-day work moving.

This article is general information. Confirm requirements against the AMA CPT 2027 code set and each payer’s published policy.