Public article
Parity protections still exist. Enforcement is what determines whether they matter in practice.
For years, federal law has said that insurance coverage for mental health and substance use treatment should not be more restrictive than coverage for physical health care. As CMS explains, the Mental Health Parity and Addiction Equity Act of 2008 generally prevents health plans that offer mental health or substance use disorder benefits from imposing less favorable financial requirements or treatment limitations on those benefits than on medical and surgical benefits. But patients, providers, and regulators have continued to report that parity on paper does not always translate into parity in practice.
In September 2024, federal agencies finalized updated parity rules intended to make enforcement more concrete. The 2024 Report to Congress on MHPAEA enforcement says those rules were designed to strengthen parity requirements and provide more detail on the comparative analyses that plans and issuers must produce when they use nonquantitative treatment limits such as prior authorization requirements, step therapy protocols, or reimbursement methodologies.
In May 2025, however, federal agencies told a court they would not enforce those newer 2024 updates while litigation brought by employer-plan interests moved forward, as first reported by STAT. The underlying 2008 parity law still exists. But the decision not to enforce the newer rule matters because enforcement is often what determines whether insurers must meaningfully justify their coverage practices.
What this can mean for patients
The effect of that shift is not abstract. Reporting and federal reviews have documented longstanding gaps between mental health coverage as described in plan documents and mental health care as patients actually experience it. In the May 2025 STAT report, one psychiatric nurse practitioner described receiving only $11 from an insurer for a $125 service, an example used to show how reimbursement practices can push behavioral health clinicians out of insurance networks.
When reimbursement is too low, providers may stop accepting insurance, leaving patients to pay out of pocket, search unsuccessfully for available care, or go without treatment altogether. That burden can be especially severe when a person is already in crisis or when a community already has too few behavioral health providers.
Federal parity reviews have also pointed to network problems in behavioral health. The 2024 MHPAEA Report to Congress describes repeated federal enforcement activity involving nonquantitative treatment limits and network standards, including changes to provider network participation standards and other restrictions that affected access to care. These problems matter because delayed access to a therapist, prescriber, or treatment program can lead to worsening symptoms, repeated emergency use, or interrupted recovery.
Why this reflects a structural inequity
This is not just a paperwork problem. It is a structural accountability issue. Mental health and substance use treatment can be formally covered while still being harder to obtain because plans use narrow provider networks, low reimbursement, medical necessity reviews, and administrative barriers that are difficult for patients to challenge.
When enforcement is weak, the burden shifts back to individual patients, families, clinicians, and advocates to challenge denials one case at a time. That makes a right recognized in federal law harder to use in practice, especially for people who do not have money, time, legal help, or enough stable health to keep fighting with an insurer.
For readers trying to understand health disparities, this issue is about more than insurance compliance. It is about whether behavioral health care is treated as a real health need or as a secondary benefit that can be narrowed, delayed, or underpaid. The practical result can be unequal access to care even when the law appears to promise otherwise.
