Following years of advocacy, Medicare Part B coverage for Applied Behavior Analysis was finalized for 2026. For the first time, BCBAs and BCaBAs can enroll as Medicare providers and bill for ABA services delivered to Medicare beneficiaries with autism spectrum disorder (ASD).
This is real — but enrollment requires specific forms filed in a specific order. Most providers who tried to enroll immediately after the announcement ran into rejections because they filed in the wrong sequence.
What’s covered
Medicare Part B now covers ABA therapy services when:
- The beneficiary has a diagnosis of ASD (ICD-10: F84.0)
- Services are medically necessary and ordered by a physician or qualified healthcare professional
- The treating provider is an enrolled BCBA or BCaBA with active Medicare billing privileges
Covered procedure codes include 97151, 97152, 97153, 97154, 97155, 97156, 97157, and 97158.
The enrollment sequence
The order matters. File out of sequence and your application will be rejected or delayed by months.
- Obtain a Type 1 NPI (if you don’t have one) via NPPES (nppes.cms.hhs.gov). BCBAs are now recognized as a Medicare provider taxonomy — use taxonomy code 103K00000X (Behavioral Analyst).
- Enroll in PECOS or file the CMS-855I on paper. For ABA, use the CMS-20134 if your MAC requires it (check your MAC’s specific guidance — some accept the CMS-855I).
- If billing under a group: The organization must first enroll using the CMS-855B and obtain a Type 2 NPI. Individual BCBAs then reassign benefits to the group using the CMS-855R.
- Credentialing with Medicare Advantage plans is separate — each MCO has its own process on top of Original Medicare enrollment.
⚠️ Risk flags
Taxonomy code matters. Using the wrong taxonomy code (e.g., a psychology or social work taxonomy instead of 103K00000X) will result in rejection. Verify your NPPES taxonomy before filing.
ASD diagnosis required on the order. Medicare will only cover ABA services for beneficiaries with an ASD diagnosis. The ordering physician’s documentation must include the ICD-10 code. Claims without it will deny.
State licensure requirements vary. Some states require BCBAs to have a state license in addition to BCBA certification for billing purposes. Check your state board’s requirements before enrolling.
Don’t bill before your PTAN is active. Your Medicare billing privileges are effective from the date CMS approves your application, not from the date you file. Billing before your approval date triggers overpayment recovery.
Timeline
Expect 45–90 days from complete application to approval for new ABA enrollments. Incomplete applications reset the clock. Verify your application is complete — PECOS will show “Pending” status; paper applications provide less visibility.
What to do now
- Check your NPPES taxonomy code
- File your enrollment via PECOS (faster) or CMS-20134/CMS-855I (paper)
- If you have a group practice, enroll the organization first
- Credential separately with any Medicare Advantage plans where your patients are enrolled
Ask Mae to walk you through your specific enrollment situation.