Applied Behavior Analysis therapy became a Medicare-covered benefit in 2026. For BCBAs, BCaBAs, and ABA organizations who have never navigated Medicare before, this is a new enrollment process with specific requirements.
This guide consolidates everything an ABA provider needs to know to get enrolled in Medicare and begin billing.
What changed in 2026
Medicare coverage for ABA therapy was established through CMS rulemaking following Congressional action. The coverage is as a Part B benefit for Medicare beneficiaries diagnosed with Autism Spectrum Disorder (ASD).
What’s covered:
- BCBA assessment and treatment planning
- Direct ABA therapy services under BCBA supervision
- Ongoing BCBA supervision of BCaBA-delivered services
What’s not covered:
- ABA for non-Medicare diagnoses (Medicare covers ABA for ASD specifically)
- Paraprofessional/RBT-level services (not covered as a Medicare benefit; services must be BCBA or BCaBA delivered)
- Services that don’t meet medical necessity documentation standards
Who needs to enroll
BCBAs: Individual BCBAs seeking to bill Medicare for supervision, assessment, and treatment planning must enroll as individual Medicare providers.
BCaBAs: BCaBAs seeking to bill Medicare for direct treatment services (under BCBA supervision) must also enroll individually.
ABA organizations (clinics): ABA organizations that will bill under an organizational NPI need both organization-level enrollment and individual enrollment for each BCBA/BCaBA.
Key applications for ABA providers
| Form | Who files it | What it does |
|---|---|---|
| CMS-20134 | Individual BCBAs and BCaBAs | Enrolls individual ABA providers in Medicare |
| CMS-855B | ABA organizations | Enrolls the organization in Medicare |
| CMS-855R | Each BCBA/BCaBA in an org | Links individual provider to organization for group billing |
| CMS-588 | Provider or org | Sets up direct deposit for Medicare payments |
Step-by-step: Individual BCBA/BCaBA enrollment
Step 1: Verify your BACB certification is current Your BACB certification is a prerequisite for Medicare enrollment. CMS verifies with the BACB. Enrollment applications with expired certifications are denied.
Step 2: Check your state’s licensure requirements Several states require state-level licensure for behavior analysts (in addition to BACB certification). CMS treats state licensure as a prerequisite in licensed states. Verify your state’s requirements before proceeding.
Step 3: Register for or update your Type 1 NPI Your individual NPI must have the correct ABA taxonomy code (103K00000X for BCBAs). If you don’t have an NPI: NPPES registration guide →. If you have an NPI with a different taxonomy, update it in NPPES first and wait 24–48 hours before proceeding.
Step 4: Create a PECOS I&A account PECOS account setup guide →
Step 5: File the CMS-20134 in PECOS Full CMS-20134 guide →
Step 6: File CMS-588 for EFT Submit the paper CMS-588 to your MAC to activate direct deposit.
Step 7: If joining an organization, file CMS-855R After your individual enrollment is approved, file a CMS-855R to reassign benefits to your employing organization.
Step-by-step: ABA organization enrollment
Step 1: Establish your organization’s Type 2 NPI Your organization needs a Type 2 NPI in NPPES with the appropriate ABA organization taxonomy. Type 2 NPI guide →
Step 2: File CMS-855B for the organization CMS-855B guide →
Step 3: Ensure each BCBA/BCaBA is individually enrolled The organization cannot bill Medicare for a BCBA or BCaBA’s services until that individual is individually enrolled (Step 5 above).
Step 4: Ensure each BCBA/BCaBA files CMS-855R The reassignment links the individual to the organization for billing.
Step 5: File CMS-588 for the organization Direct deposit for the organization.
Step 6: Configure billing system Set up billing with the organization’s NPI and PTAN, individual provider NPIs as rendering providers.
Medicare billing basics for ABA
Once enrolled, ABA services are billed using ABA-specific procedure codes. As of 2026, CMS established:
- 97151 — Behavior identification assessment
- 97152 — Behavior identification-supporting assessment
- 97153 — Adaptive behavior treatment by protocol, with one patient, each 15 minutes
- 97154 — Group adaptive behavior treatment by protocol, 2+ patients
- 97155 — Adaptive behavior treatment with protocol modification
- 97156 — Family adaptive behavior treatment guidance
- 97157 — Multiple-family group adaptive behavior treatment guidance
- 97158 — Group adaptive behavior treatment with protocol modification
- 0362T / 0373T — Technology-based assessment codes
Who can bill what:
- BCBAs bill assessment codes (97151, 97152) and protocol modification codes (97155)
- BCaBAs bill direct treatment codes (97153, 97154) under BCBA supervision
- Documentation must support medical necessity and the specific code billed
⚠️ Prior authorization requirements: Most MACs and MCOs require prior authorization for ongoing ABA treatment beyond the initial evaluation. Check your MAC’s specific requirements before the first patient encounter.
⚠️ Risk flags
⚠️ Documentation from day one. ABA is a new Medicare benefit and will face heightened audit scrutiny. Functional behavior assessments, individualized treatment plans, progress notes, and BCBA supervision documentation must be complete, current, and accessible. Don’t wait to build documentation workflows.
⚠️ BCaBA supervision requirements. Medicare requires BCaBA services to be under active BCBA supervision. “Supervision” under Medicare’s standards means specific documentation of supervision activities — not just the clinical supervision relationship. Check CMS guidance on ABA supervision documentation requirements.
⚠️ Taxonomy code accuracy. Use the ABA-specific taxonomy code for enrollment and billing. Misclassified taxonomy can result in claim denials even after successful enrollment.
⚠️ RBT services are not covered. Registered Behavior Technician-level services are not a Medicare-covered benefit. Only BCBA and BCaBA services are billable to Medicare. ABA organizations cannot bill RBT time to Medicare under ABA codes.
MCO enrollment for ABA
Many Medicare Advantage plans have yet to develop specific ABA provider credentialing workflows as of 2026. When credentialing for MCO networks:
- Use your CAQH profile with ABA taxonomy
- Ask each plan whether they have specific ABA credentialing criteria
- Some plans may apply behavioral health or mental health credentialing criteria — verify which applies
Resources
- CMS-20134 — ABA Enrollment Form Full Guide
- ABA Medicare Coverage: What Changed in 2026
- PECOS Overview
- Free Medicare Enrollment Audit
ABA Medicare enrollment questions? Mae is briefed on the 2026 expansion. Ask Mae → Free enrollment audit from Metolius Health →