Michigan’s IDD service system is structured differently from most states, with a significant portion of Medicaid funding for IDD services flowing through Prepaid Inpatient Health Plans (PIHPs) and Community Mental Health Service Programs (CMHSPs) rather than directly through the state Medicaid program. For IDD agencies, this means billing relationships and requirements can vary depending on which PIHP or CMHSP your agency contracts with, adding a layer of complexity that agencies in other states do not face.
This guide covers the key elements of IDD billing in Michigan and the compliance requirements agencies need to stay on top of.
How Michigan’s IDD Funding System Works
The Michigan Department of Health and Human Services (MDHHS) administers the state’s Medicaid program, but Medicaid-funded behavioral health and IDD services are largely managed through a regional PIHP structure. There are 10 PIHPs in Michigan, each covering a geographic region and contracting with local CMHSPs to deliver services. IDD agencies typically contract directly with their regional CMHSP.
This structure means that billing requirements, claim formats, and authorization processes can vary between regions. Agencies operating in multiple regions need to manage these variations carefully. MDHHS publishes the Medicaid Provider Manual as the baseline reference for Michigan Medicaid billing requirements.
Michigan EVV Requirements
Michigan has implemented EVV requirements for personal care and home health services funded through Medicaid. Michigan uses the Sandata EVV system as its state-designated aggregator for most services, though agencies should verify current requirements with their CMHSP and monitor MDHHS communications for updates.
IDD agencies in Michigan must ensure their EVV system is configured to transmit data to the Michigan EVV aggregator in the required format. Vertex EVV Manager supports Michigan EVV requirements and feeds visit data directly into the billing workflow, eliminating manual reconciliation between EVV records and claims.
CMHSP Contracts and Billing Compliance
Because Michigan IDD agencies bill through their CMHSP contracts, maintaining compliance with both the CMHSP’s specific billing requirements and the underlying MDHHS standards is essential. CMHSPs conduct their own audits and have specific documentation requirements for the services they fund. Agencies should maintain close communication with their CMHSP billing contacts and ensure their documentation and billing practices align with both levels of requirements.
Documentation Requirements for Michigan IDD Services
Michigan requires detailed service documentation for Medicaid-funded IDD services, including person-centered planning documentation, individual plan of service records, and service notes that demonstrate the connection between planned and delivered services. Vertex Case Manager maintains this documentation in a centralized, audit-ready format that supports both billing accuracy and compliance reviews.
Efficiency Opportunities for Michigan IDD Agencies
The multi-layer billing environment in Michigan makes integrated billing software especially valuable. When EVV, documentation, and billing are connected within a single platform, the manual steps required to compile information from multiple sources before each billing cycle are eliminated. Explore Vertex’s Michigan-specific billing support or calculate your potential efficiency gains with our Billing ROI Calculator.
