What Happened
On March 3, 2026, the Department of Labor (EBSA), HHS (CMS), and Treasury published their fourth annual MHPAEA enforcement report to Congress, covering enforcement activity from August 2023 through July 2025. The numbers: 85 initial requests for comparative analyses of nonquantitative treatment limitations (NQTLs), 76 insufficiency letters, 34 initial determination letters, and 15 final noncompliance determinations. CMS drove the majority of enforcement, issuing four times as many insufficiency letters as EBSA (62 versus 14) and twice as many final determinations (10 versus 5).
The report is notably shorter than prior editions (32 pages versus 142 in 2024) and uses language about ensuring protections are “not unduly burdensome.” But the MHPAEA final rules remain in effect, and the January 1, 2026 compliance deadline for the meaningful benefits standard and prohibition on discriminatory factors has already passed.
Who It Affects
Self-funded employer health plans bear direct legal responsibility for MHPAEA compliance. The report makes this explicit: the plan sponsor, not the TPA or network vendor, owns the comparative analysis obligation. Benefits directors at mid-to-large employers (particularly those with behavioral health carve-outs or restrictive prior authorization protocols for mental health and substance use disorder services) face the most immediate exposure. The three most frequently cited violations involved prior authorization requirements, network admission standards, and out-of-network reimbursement methodologies for MH/SUD services.
The Reserve Mechanism
The reserving consequence runs through the expected claim ratio and case reserve adequacy. Plans that historically applied more restrictive NQTLs to behavioral health (tighter prior authorization, narrower networks, shorter authorization windows) effectively suppressed MH/SUD utilization. Once those NQTLs are brought into parity with medical and surgical benefits, a step-change increase in behavioral health claims frequency follows.
For benefits directors using a Bornhuetter-Ferguson or expected-claims approach to forecast aggregate plan costs, the expected claim ratio for behavioral health should be recalibrated upward. The prior years’ paid claims data understates the true run-rate because access was artificially constrained. This is not a development pattern change (claims will not necessarily take longer to settle), but rather a frequency shift: more members accessing care, more claims entering the system, and higher aggregate utilization.
The second-order effect hits stop-loss adequacy. If the aggregate claims forecast increases by 5 to 15 percent on behavioral health spend (a plausible range depending on how restrictive prior NQTLs were), that increase may push total plan costs closer to or through the aggregate corridor. Plans with specific stop-loss attachment points set based on historical claim distributions may also find their attachments too low to absorb the new frequency layer.
What to Ask Your Actuary
- If we bring our MH/SUD prior authorization and network access requirements into full parity with medical/surgical benefits, what is the estimated utilization increase and its impact on our aggregate claims forecast for the current plan year?
- Should we adjust our specific stop-loss attachment point or add a behavioral health loading factor to absorb the expected frequency step-change from NQTL compliance?
- Are our historical paid claims triangles for behavioral health services still credible as a development base, or do we need to apply a prospective frequency adjustment to the expected claim ratio?
What to Watch Next
The enforcement signal to monitor is whether DOL initiates civil monetary penalties against self-funded plans that missed the January 1, 2026 deadline for the meaningful benefits standard. The fourth report documents compliance letters and determinations, but no penalties. The first actual fine under the new rules would confirm that enforcement has moved beyond advisory mode. A pending legal challenge to portions of the MHPAEA final rules could also narrow or delay enforcement scope, so watch the docket alongside the agency calendar.