Michigan Medicaid ABA Billing Updates 2026: What BCBAs and ABA Providers Must Prepare For

Michigan Medicaid is in the middle of some of the most significant changes it has seen in a decade. If you run an ABA practice or bill for ABA services in Michigan, these changes will hit your caseload, your revenue, and your authorization workflows, starting as early as October 2026.

This isn't a slow-moving policy update. The timeline is compressed, several changes are already active, and others go live before the end of this year. Michigan Medicaid covers more than 2.6 million state residents, and the Healthy Michigan Plan, which funds a significant share of ABA caseloads, is at the center of the disruption.

Here's what ABA providers need to know right now.

Michigan Medicaid Fee Schedule 2026: ABA & Behavioral Health Updates

Effective January 1, 2026, MDHHS updated its fee schedule rates to match the federal CMS 2026 Physician Fee Schedule, including a 2.5% payment increase for behavioral health providers and ABA services billed through Medicaid fee-for-service. 

Michigan also adopted new HCPCS codes under Bulletin MMP 26-03 for services provided on or after January 1, 2026. If billing systems are not updated with these codes, claims may be rejected before processing.

For ABA services, BCBAs typically bill 97151 and 97155, while RBT-delivered treatment is billed under 97153. Family guidance services continue under 97156. Although the published Medicaid fee-for-service ABA rate is $13.50 per unit, most Michigan ABA providers bill through MCOs rather than directly through MDHHS, which means reimbursement rules and workflows can vary by plan.

What Changed in 2026 for Prior Authorizations?

Another major shift is the CHAMPS prior authorization process.

MDHHS updated the CHAMPS Prior Authorization screens on March 22, 2026, under policy bulletin MMP 26-02. Standard prior authorization requests must now be reviewed within 7 calendar days, while expedited requests must be completed within 72 hours.

On paper, that sounds helpful for ABA providers. Faster decisions can reduce delays and help services start sooner.

But there is a catch. If the prior authorization packet is incomplete, denials can occur more quickly, too.

That means providers need to make sure the assessment, treatment plan, medical necessity details, requested hours, caregiver goals, and supporting documentation are accurate before submission. Missing information can delay approvals, interrupt billing, and create payment gaps if services continue without authorization.

The CMS Interoperability and Prior Authorization Final Rule also requires payers to provide denial reasons with these faster timelines beginning in 2026.

For ABA practices, the takeaway is simple: quicker prior authorization decisions only help when documentation is complete from the start.

CPT Code Changes and Documentation Standards for 2026

Michigan Medicaid follows CMS CPT code guidelines for ABA billing. The codes themselves have not changed in 2026, but the documentation expectations tied to each code have been tightened across multiple plans.

The shift in 2026 is toward data-driven documentation over narrative-only session notes. Michigan managed care plans are increasingly running automated reviews that flag sessions where notes lack trial data or behavioral objectives. These flagged claims move into medical review queues, which slows reimbursement significantly.

BCBA Credentialing Under Michigan Medicaid in 2026

Credentialing delays remain one of the most persistent revenue killers for ABA practices in Michigan. A BCBA who has not completed credentialing with a specific managed care plan cannot bill services rendered under that plan, even if they are fully licensed and BACB-certified.

 The 2026 updates that matter most for credentialing include:

• Molina Healthcare Michigan and McLaren have adopted a centralized credentialing verification process through the Michigan Primary Care Consortium. If your BCBAs are applying to multiple plans, this may simplify submission, but adds a new step in the verification chain.

• UHC Community Plan Michigan now requires re-attestation every 24 months for all contracted BCBAs, down from 36 months. Missing a re-attestation window can result in a lapse in your contracting status without advance notice.

• Several plans now require proof of BACB continuing education completion at the time of credentialing renewal, not just at license renewal. Keep copies of CEU documentation in your credentialing files.

 Federal Medicaid Cuts: What ABA Providers Should Watch

The broader Medicaid policy changes happening in 2026 could create real challenges for ABA providers in Michigan, even if some updates have not affected billing directly yet. 

The One Big Beautiful Bill Act includes nearly $1 trillion in Medicaid cuts over the next 10 years and is still facing legal challenges. Starting in October 2026, new non-citizen eligibility restrictions begin, and Medicaid expansion adults will need to renew coverage every 6 months beginning in December 2026.

For ABA practices, this may lead to more coverage interruptions when families miss renewal deadlines. That can create retroactive eligibility problems, disrupted prior authorizations, and unexpected billing issues during active treatment.

Because of this, it is smart to verify Medicaid eligibility at the start of every billing month, not just during intake. A simple monthly check can prevent a lot of claim and authorization problems later.

FAQ

1. What is the income limit to receive Medicaid in Michigan? 

Michigan Medicaid income limits depend on household size, age, disability status, and program type. Most adults qualify through the Healthy Michigan Plan if their income falls within federal eligibility guidelines. 

2. Who is eligible for Medicaid in Michigan in 2026?

Michigan Medicaid eligibility in 2026 includes low-income adults, children, pregnant women, seniors, and people with disabilities. Eligibility is based on income, residency, household size, and medical or financial need. 

3. Does Michigan have Medicaid expansion?

Yes, Michigan expanded Medicaid through the Healthy Michigan Plan. The program helps low-income adults access healthcare coverage, including behavioral health and ABA-related services for qualifying individuals and families. 

4. How to become a BCBA in Michigan? 

To become a BCBA in Michigan, you need BACB certification, supervised fieldwork, graduate-level coursework, and an active Michigan LBA license through LARA before providing billable ABA services.