Medicaid Mental Health and Substance Use: Expansion Trends and the Fiscal Pressure Ahead

by Grace Chen

For millions of Americans living with behavioral health conditions, Medicaid is not just a safety net—it is the primary gateway to survival. The program currently finances care for nearly one-third of all adults with mental illness and approximately one-quarter of those struggling with substance use disorders (SUD), including nearly half of all adults with opioid use disorder (OUD). By covering a vast share of treatment services and essential medications, Medicaid has become the central pillar of the U.S. Behavioral health infrastructure.

However, a decade of aggressive Medicaid mental health and substance use expansion is now colliding with a volatile fiscal climate. While states have spent years closing gaps in community-based treatment and responding to the opioid epidemic, new federal policy shifts—specifically those within the 2025 reconciliation law—threaten to undo these gains. The introduction of work requirements for Medicaid expansion adults, who represent the primary coverage pathway for those with mental health or substance use disorders, creates a high risk of coverage loss that could abruptly interrupt life-saving treatment and medication access.

As a physician, I have seen how the stability of insurance coverage directly correlates with patient outcomes. When a patient loses access to their provider or their prescriptions, the result is rarely a quiet transition; it is often a crisis that ends in an emergency room or a psychiatric ward. The current tension between state-level expansion and federal restriction puts this stability in jeopardy for the nation’s most vulnerable populations.

The Decade of Expansion and the Shift Toward Integrated Care

Over the last ten years, behavioral health has consistently been the most frequently cited category for benefit expansion in annual Medicaid budget surveys. States have moved beyond basic coverage, attempting to build a comprehensive “crisis continuum of care” that includes everything from residential and outpatient services to peer supports and home-based care.

The Decade of Expansion and the Shift Toward Integrated Care
Medicaid Mental Health Collaborative Care Model

This expansion was driven by both state priorities and federal catalysts, such as the SUPPORT Act and the American Rescue Plan Act (ARPA). These initiatives helped states integrate behavioral health into schools and address the social determinants of health—the non-medical factors like housing and food security that often dictate whether a mental health treatment plan succeeds or fails.

A key part of this evolution has been the move toward the Collaborative Care Model (CoCM) and the adoption of Certified Community Behavioral Health Clinics (CCBHCs). These models aim to provide a broad spectrum of services in a single setting, reducing the “referral loop” where patients are bounced between disconnected providers.

The Workforce Crisis and the Slowdown in Provider Pay

Adding benefits to a Medicaid plan is only effective if there are providers available to deliver them. To combat chronic workforce shortages and narrow provider networks, many states have increased fee-for-service (FFS) payment rates for outpatient clinicians, including psychiatrists, psychologists, and clinical social workers.

The Workforce Crisis and the Slowdown in Provider Pay
States

Data shows that more than half of states implemented rate increases for one or more outpatient behavioral health providers in FY 2024, with about half continuing this trend into FY 2025. Because these FFS rates often serve as the benchmark for managed care payments, these increases are critical for keeping clinicians in the Medicaid system.

However, this momentum is stalling. Only about one-quarter of states reported plans to increase outpatient behavioral provider rates for FY 2026. This slowdown likely reflects the expiration of pandemic-era federal funding and the anticipated budget reductions tied to the 2025 reconciliation law. When reimbursement rates stagnate or drop, the first result is typically a reduction in the number of providers willing to accept new Medicaid patients, further tightening an already strained system.

Specialized Treatment Models for Serious Mental Illness

For patients with serious mental illness (SMI), standard outpatient care is often insufficient. States are increasingly turning to evidence-based, intensive models to keep these high-needs patients stable in their communities and out of hospitals.

The growth of CCBHCs is a primary example of this shift. These clinics serve patients regardless of their ability to pay and provide coordinated care. In FY 2025, 19 states recognized CCBHCs as a specific enrolled provider type—a significant jump from only nine states in FY 2022.

Figure 1: State Recognition of CCBHCs as a Provider Type

Another critical model is Assertive Community Treatment (ACT), which uses multidisciplinary teams to provide 24-hour individualized support. ACT is specifically recommended for patients with schizophrenia who struggle to engage with traditional services. Currently, 34 states and the District of Columbia report FFS coverage for ACT for adults.

Hazelden Betty Ford expands treatment, care for substance use and mental health

Despite this coverage, the gap between policy and practice remains wide. Only about 27% of mental health facilities serving people with SMI reported offering ACT services in 2023. The danger of funding volatility is starkly illustrated by recent events in Idaho, where 2025 budget cuts interrupted ACT services. Media reports documented that some Medicaid enrollees died following the disruption of these services, though Idaho later restored the funding.

The least common but highly effective model is Coordinated Specialty Care for First Episode Psychosis (CSC-FEP). Designed for those experiencing psychosis for the first time, this early intervention model reduces long-term disability and preventable hospitalizations. Currently, only seven states report FFS coverage for CSC-FEP in FY 2025, though several more plan to add it by FY 2026, and Virginia is expected to begin coverage in FY 2027.

Figure 2: State Coverage of ACT and CSC-FEP
Figure 2: State coverage of ACT and CSC-FEP

The Road Ahead: Fiscal Pressure and Patient Risk

The trajectory of Medicaid behavioral health care is currently at a crossroads. The expansion of services over the last decade has proven that integrated, community-based care can reduce acute hospitalizations and improve quality of life. However, the sustainability of these programs is now under threat from both federal mandates and state-level budget constraints.

The Road Ahead: Fiscal Pressure and Patient Risk
Medicaid Mental Health States
Treatment Model Target Population FY 2025 Coverage Trend Primary Benefit
CCBHCs General Behavioral Health Rapid Growth (19 States) One-stop coordinated care
ACT Severe SMI/Schizophrenia Stable/High (34 States) Prevents hospitalization
CSC-FEP First Episode Psychosis Emerging (7 States) Early intervention/Recovery

The most immediate concern is the potential for mass coverage loss due to work requirements. For a patient with a severe mental illness or a profound substance use disorder, the administrative burden of proving “work requirements” can be an insurmountable barrier, leading to a loss of insurance that triggers a clinical relapse.

Disclaimer: This article is for informational purposes only and does not constitute medical or legal advice. Please consult a healthcare provider or a policy expert for guidance on specific Medicaid benefits and eligibility.

If you or a loved one is experiencing a mental health crisis, help is available. You can call or text the 988 Suicide & Crisis Lifeline at 988 in the U.S. And Canada.

The next critical checkpoint for these services will be the release of the FY 2026 state budget proposals, which will reveal whether states can sustain provider rate increases and maintain specialized care models in the face of federal funding reductions.

We want to hear from you. How have changes in Medicaid coverage affected behavioral health access in your community? Share your thoughts in the comments or on social media.

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