CMS Cracks Down on Medicaid Fraud: New Payment Rules & State Impacts

The Centers for Medicare & Medicaid Services (CMS) is signaling a significant shift in how it oversees federal Medicaid funding, placing increased emphasis on potential fraud. This modern approach, focused initially on Minnesota and three other states with Democratic governors – California, Maine, and New York – represents a departure from historical practices and could have broad implications for state budgets and access to care. The changes come as the House Committee on Energy and Commerce also expands its own investigation into potential Medicaid fraud, requesting information from eleven states in total.

A Historic Shift in Oversight

Traditionally, CMS has partnered with states to identify and address Medicaid fraud, waste, and abuse, typically disallowing federal funds after an audit or investigation confirmed wrongdoing. This process, although intended to safeguard taxpayer dollars, could take years to resolve. The new strategy, yet, prioritizes proactive measures, including deferring and even withholding federal payments when fraud is suspected. This represents a more aggressive stance, shifting the burden of proof to states and potentially impacting a wider range of Medicaid spending, even for services not directly involved in fraudulent activity.

The core of this change lies in three key mechanisms: disallowances, deferrals, and withholds. Understanding these distinctions is crucial to grasping the scope of CMS’s evolving approach. Historically, disallowances have been used to deny federal matching funds for expenditures later deemed unallowable. While states can appeal these decisions, the process is lengthy and the burden of proof rests with the state. A Government Accountability Office report from 2018 suggests disallowances weren’t uncommon between 2014 and 2017, but detailed information on their frequency remains limited.

More recently, deferrals – pausing payments while CMS investigates – have gained prominence. States have 60 days to provide requested documentation, and failure to comply can lead to disallowance. The recent announcement of a temporary deferral of $259 million in federal Medicaid payments to Minnesota for fiscal year 2025, described as an unprecedentedly large amount, underscores this shift. Finally, withholds represent the most forceful action, involving the suspension of ongoing federal payments, requiring a hearing and a corrective action plan from the state.

Minnesota at the Center of the Debate

Minnesota is currently facing a $515 million withhold – nearly 20% of the federal share of the state’s Medicaid spending – pending the outcome of a hearing. This action, initiated in January 2026, differs from past withholdings, which typically addressed issues like improper eligibility restrictions. Instead, Minnesota’s case centers on potential future fraud, raising concerns about the scope and justification of the CMS action. The state has already submitted a revised corrective action plan, but as of March 16, 2026, CMS has not scheduled a hearing, leaving the situation unresolved.

Implications for States and Enrollees

The new CMS approach introduces significant uncertainty for state budgets. States operate under balanced budget requirements, and the sudden loss of federal funds – through deferrals or withholdings – can create immediate financial strain. This could lead to difficult decisions regarding Medicaid spending, potentially impacting provider payment rates, covered services, or eligibility criteria.

The impact extends beyond state finances. Reduced funding could affect Medicaid enrollees and providers not involved in any fraudulent activity. States might be forced to limit services or reduce payments, potentially disrupting access to care. Increased audits and administrative burdens could also create challenges for providers lawfully offering Medicaid services.

These changes also coincide with ongoing efforts to implement provisions of the 2025 reconciliation law, which already included substantial reductions in federal Medicaid funding and new administrative requirements, such as work requirements for some enrollees. The combined effect of these changes could significantly challenge states’ ability to maintain current levels of Medicaid coverage and access.

Navigating a Complex Landscape

The National Association of Medicaid Directors (NAMD) has outlined several steps CMS could take to support states in addressing fraud, waste, and abuse, including providing clearer guidance, improving data sharing, and strengthening collaborative efforts.

What to Expect Moving Forward

The situation in Minnesota is being closely watched by other states, and the outcome will likely shape the future of federal-state Medicaid partnerships. The Departmental Appeals Board rulings, while historically favoring CMS, have also demonstrated the lengthy and complex nature of resolving these disputes. Between 2020 and 2025, cases took an average of 15 years to resolve, highlighting the need for more efficient and transparent processes.

For states facing potential deferrals or withholdings, proactive engagement with CMS, thorough documentation, and a willingness to implement corrective action plans will be crucial. For enrollees and providers, staying informed about state-level Medicaid changes and advocating for continued access to care will be essential. The evolving landscape of Medicaid oversight demands vigilance and collaboration to ensure the program’s long-term sustainability and its ability to serve vulnerable populations.