Mental Health Parity Enforcement in 2026: What Changed and What Psychiatry Practices Should Do Now

What Is the DOL’s New Mental Health Parity Enforcement Approach?

As of September 2026, the Department of Labor narrowed its enforcement of the Mental Health Parity and Addiction Equity Act (MHPAEA) to three priority areas: blanket treatment exclusions that apply only to mental health and substance use disorder benefits, medical necessity review processes including prior authorization, and network adequacy standards for behavioral health providers. This shift, outlined in Field Assistance Bulletin No. 2026-03, means psychiatry practices can expect increased scrutiny on how insurers handle prior authorization and network inclusion for mental health services, while certain newer compliance requirements from the 2024 Final Rule remain on hold pending ongoing litigation.

• Three enforcement priorities: The DOL will focus on blanket MH/SUD treatment exclusions, medical necessity and prior authorization processes, and network adequacy standards for behavioral health.
• 2024 Final Rule provisions on hold: The meaningful benefits standard, discriminatory factors prohibition, and relevant data evaluation requirements will not be enforced while litigation continues.
• New self-compliance tool: The DOL released an accompanying enforcement guidance tool to help health plans evaluate their own NQTL compliance, which gives psychiatry practices a reference point for challenging unfair denials.

What the DOL Bulletin Actually Changed

On September 8, 2026, the Department of Labor’s Employee Benefits Security Administration (EBSA) released Field Assistance Bulletin No. 2026-03 alongside a self-compliance tool for the Mental Health Parity and Addiction Equity Act. The bulletin establishes what the DOL calls “guiding principles” for enforcing the nonquantitative treatment limitation (NQTL) requirements under MHPAEA, and it represents a deliberate narrowing of enforcement scope.

The context matters. In 2024, the Tri-Agencies (DOL, HHS, and Treasury) issued a final rule that significantly expanded NQTL compliance requirements. That rule faced immediate legal challenge from employer groups, and by May 2025 the agencies announced they would not enforce the new provisions. The September 2026 bulletin takes that pause a step further by telling enforcement staff exactly where to focus their limited resources.

What is not being enforced right now includes the meaningful benefits standard, the prohibition on discriminatory factors and evidentiary standards, relevant data evaluation requirements, and related comparative analysis provisions that were set to take effect for plan years beginning on or after January 1, 2026. The DOL has committed to issuing a new proposed rule no later than December 31, 2026, and the next status report in the ERIC litigation is due September 30, 2026. Both events could shift the enforcement landscape again before year-end.

For psychiatry practices, the practical takeaway is that parity enforcement is not going away. It is being concentrated on the areas that produce the most direct harm to patients, and several of those areas overlap directly with the denial categories that cost psychiatric providers the most revenue.

Who Does the Mental Health Parity Bulletin Affect?

The DOL’s enforcement of MHPAEA applies to ERISA-governed group health plans and health insurers. In practical terms, that covers the majority of employer-sponsored insurance plans that psychiatry practices bill against. If your patients carry coverage through an employer plan, the parity requirements apply to how their insurer handles behavioral health claims.

Psychiatrists, psychiatric nurse practitioners, and group practices that accept commercial insurance are on the front line of this enforcement shift. When an insurer applies prior authorization requirements to psychiatric evaluations billed under CPT 90791 or medication management visits (99213 to 99215 with add-on psychotherapy) that it does not apply to comparable medical/surgical E/M visits, that is a potential parity violation under the bulletin’s second priority area.

The bulletin also affects providers indirectly through network adequacy. The DOL will scrutinize whether plans maintain adequate in-network behavioral health provider panels. Psychiatry already has one of the lowest network participation rates among medical specialties, and the DOL has stated that when network adequacy parity issues exist, plans must help participants access covered MH/SUD treatments without exposing them to out-of-network costs.

In our experience matching providers with billing partners, the practices most affected by parity-related denials are those that lack the internal resources to appeal. A billing company that understands MHPAEA compliance can turn a parity violation into a successful appeal, but only if the denial is identified correctly in the first place.

Why This Enforcement Shift Matters for Revenue

The DOL’s decision to concentrate enforcement on prior authorization, treatment exclusions, and network adequacy directly addresses three of the most common revenue loss points in psychiatry billing. According to Experian Health’s 2025 State of Claims Report, more than 41 percent of U.S. healthcare providers now report that over one in ten claims are denied, and that figure has climbed every year since 2022. Behavioral health is disproportionately affected because payers routinely apply stricter utilization management to MH/SUD services.

Prior authorization alone accounts for a significant share of psychiatry claim delays. When a payer requires prior auth for a 90-minute psychotherapy session (CPT 90837) but does not require it for a comparable-length medical procedure, that is exactly the kind of disparity the DOL’s second enforcement priority targets. The bulletin states that plans may use proprietary clinical guidelines for medical necessity determinations, but the processes, strategies, evidentiary standards, and other factors used for MH/SUD benefits must be comparable to those used for medical/surgical benefits and applied no more stringently.

The network adequacy piece is equally significant. Psychiatry has among the lowest ratios of in-network providers to covered lives. When plans fail to maintain adequate behavioral health networks, patients face out-of-network costs, but the DOL is now signaling that this failure may constitute a parity violation. For practices that have stayed out of network due to low reimbursement rates, this enforcement pressure could push payers to offer more competitive contracts to build their panels.

Providers often come to us after repeated denials for services that should be covered. When we look at the denial patterns, a significant portion trace back to prior authorization requirements or medical necessity criteria that are applied more restrictively to behavioral health than to medical/surgical services. That pattern is now squarely in the DOL’s enforcement crosshairs.

How Does the DOL’s Self-Compliance Tool Help Psychiatry Practices?

Alongside the enforcement bulletin, the DOL released an MHPAEA Enforcement Guidance document that functions as a self-compliance tool for health plans. While the tool is written for plan sponsors and insurers, it gives psychiatry practices and their billing teams a reference point for identifying parity violations when claims are denied.

The guidance addresses several practical questions: what to look for when reviewing a plan for potential MHPAEA NQTL compliance problems, best practices for selecting health plan service providers, how to monitor operational compliance for specific NQTLs, examples of how plans have addressed concerns during investigations, and tips for plans being reviewed by the DOL.

For billing teams, the most actionable section is the guidance on identifying potential compliance problems. When a denial comes back citing medical necessity or lack of prior authorization, billing staff can cross-reference the insurer’s requirements against what the plan applies to comparable medical/surgical benefits. If the insurer requires prior auth for psychiatric diagnostic evaluations or for add-on psychotherapy services like CPT 90833 but not for initial medical evaluations of similar complexity, that discrepancy can form the basis of a parity-based appeal.

The DOL is explicit that the self-compliance tool does not constitute legal advice. It is a structured checklist and a starting point, not a substitute for a defensible comparative analysis. Practices that want to use this framework should work with their billing company and, where needed, legal counsel to build an appeal strategy rooted in the bulletin’s three priority areas.

What Psychiatry Practices Should Do Now

The enforcement bulletin creates a window where psychiatry practices can take specific, documented steps to protect revenue and position for parity-based appeals. The following actions apply regardless of practice size.

1. Audit your top five payers for prior authorization requirements on psychiatric services. Compare what they require for CPT 90791, 90834, 90837, and E/M codes with add-on psychotherapy against what they require for medical/surgical E/M services of comparable complexity.
2. Document every denial that cites medical necessity or lack of prior authorization. Include the specific NQTL the payer applied and whether a comparable limitation exists for medical/surgical benefits.
3. Request your payer’s NQTL comparative analysis. Under the Consolidated Appropriations Act of 2021, plans must produce their comparative analysis within 10 business days of a request. This document shows how the plan evaluated its own parity compliance.
4. Review your network participation status and reimbursement rates. If you are out of network with a payer that has inadequate behavioral health panels, the DOL’s third enforcement priority may create leverage for renegotiating terms.
5. Flag blanket treatment exclusions in your Explanation of Benefits. If a payer excludes a specific MH/SUD treatment category entirely while covering analogous medical/surgical treatments, that falls under the DOL’s first enforcement priority.
6. Brief your billing team or billing company on the bulletin’s three priority areas. The denial-to-appeal pipeline only works if the person reading the EOB knows what to look for.

Common Mistakes When Handling Parity-Related Denials

The most common issue we see providers run into is treating a parity-related denial the same as a standard coding denial. They are not the same. A coding denial means the claim was submitted with incorrect information. A parity-related denial means the insurer applied a restriction to mental health services that it does not apply to comparable medical/surgical services. The appeal strategy is completely different.

Another frequent mistake is accepting a medical necessity denial at face value without questioning whether the payer applies the same medical necessity criteria to medical/surgical services. Under MHPAEA, the standard is not whether the payer has a medical necessity policy. The standard is whether that policy is applied comparably across benefit categories. The DOL’s bulletin reinforces this by listing medical necessity standards and review processes as its second enforcement priority.

Practices also frequently miss the 10-day request window for NQTL comparative analyses. If a payer denies a claim and you suspect a parity violation, request the comparative analysis immediately. Plans are required by law to produce it within 10 business days. If they cannot, that itself is a compliance failure worth documenting.

Finally, many practices do not track denial patterns by payer and by denial reason code. Without that data, you cannot identify whether a payer is systematically applying stricter requirements to MH/SUD claims. A billing company with behavioral health experience will track these patterns and flag potential parity violations before they become a chronic revenue problem.

Before and After the September 2026 Bulletin

The following table summarizes how DOL enforcement priorities shifted with the release of Field Assistance Bulletin No. 2026-03.

In-House Billing vs. Outsourced for Parity Compliance

Parity-based denial appeals require a different skill set than standard claim correction. An in-house biller focused on coding accuracy and clean claim rates may not have the training or bandwidth to evaluate whether a denial reflects a parity violation. The process involves comparing the insurer’s MH/SUD utilization management requirements against its medical/surgical requirements, requesting the NQTL comparative analysis, and building an appeal that references the specific MHPAEA provision the insurer may be violating.

Outsourced billing companies that specialize in behavioral health are more likely to have built parity appeal workflows into their denial management process. Across the billing companies we vet, a recurring pattern is that the ones with dedicated behavioral health teams catch parity violations at a significantly higher rate than generalist billing operations. They know which payers apply prior auth to 90837 but not to comparable medical procedures, and they track those patterns across their client base.

That said, outsourcing is not a substitute for practice-level awareness. Your billing company can only appeal what you document. If a patient reports being told their insurer denied a service or required additional authorization that they did not need for a comparable medical visit, that observation needs to make it into the billing workflow. The combination of practice-level documentation and billing-company-level parity expertise is what produces successful appeals. For a deeper look at how outsourced billing strengthens the full revenue cycle, see our guide on improving revenue cycle and billing management in behavioral health.

Frequently Asked Questions

Next Steps

• Start by auditing your current denial patterns for parity-related issues using the DOL’s three priority areas as your framework.
• If you do not have a billing partner that tracks parity violations and builds appeals around MHPAEA, Psychiatry Billers can connect you with one that does.
• Review our guide on psychiatry billing to understand how coding accuracy, denial management, and parity compliance work together to protect your revenue.