Enlyte’s 2026 Envision Trends Report, released June 3, quantifies what many self-insured employers have felt in their triangles but could not isolate: behavioral health comorbidity is now a measurable severity driver in workers’ compensation. Across all WC claims, behavioral health involvement adds 10% to total severity. Among lost-time claims with behavioral health treatment, medical costs run approximately four times higher and treatment duration extends 208% compared to claims without that component.
The share of WC claims involving behavioral health has grown 15.3% since 2022, and that acceleration is not slowing.
Who it affects
Self-insured employers in healthcare, manufacturing, construction, and public safety carry the most concentrated exposure. These sectors combine physically demanding work (generating the underlying WC claim) with elevated rates of depression, anxiety, and substance use disorders (generating the comorbidity). Any employer running a retained WC program with more than a few hundred open claims likely has behavioral health involvement in a meaningful share of its book, whether or not the TPA is coding it separately.
The reserve mechanism
The effect is severity, compounded by development pattern shift. Behavioral health comorbidity does not create new claims; it makes existing claims more expensive and slower to close. The 208% longer treatment duration means claims that would ordinarily close in 12 to 18 months instead remain open for three years or more, pushing loss emergence into later development periods. Standard chain ladder factors selected from pre-2022 experience will understate the tail on these claims because the historical mix contained fewer behavioral health cases.
Average allowed medical costs per claimant reached $5,121 in 2025, up 9.5% from 2022, per the Enlyte report. Average days to first treatment rose to 16.1 in 2025 from 9.2 in 2022, with the increase concentrated in a subset of claims experiencing material delays. Longer gaps between injury and initial treatment correlate with worse outcomes and higher ultimate costs.
The report also flags that 67.3% of case-managed WC claims now involve at least one confounding factor: obesity, surgery, hypertension, attorney representation, opioids, or depression. Each additional factor extends duration and raises cost. For self-insured employers who are not segmenting these claims, the blended development triangle masks a severity trend that is steeper than the aggregate numbers suggest.
What this means for your next review
Ask your actuary whether your loss development analysis segments claims with behavioral health involvement separately. If it does not, the blended severity trend is almost certainly understating ultimate costs on that subset. Specifically, request a comparison of development patterns for claims flagged with behavioral health comorbidities versus the remainder of the book. If the duration differential is anywhere near the 208% figure Enlyte reports system-wide, your current IBNR factors at early maturities are too low for that cohort.
Also confirm with your TPA that behavioral health involvement is being coded consistently at the claim level. You cannot segment what you cannot identify. If the coding is inconsistent or missing, that is the first problem to fix, because the data gap compounds every quarter the triangle develops without it.
For employers seeing case reserve strengthening on older WC claims that seemed stable, behavioral health comorbidity is one of the likeliest explanations. The claim did not get worse because the original injury changed; it got worse because a secondary condition extended treatment and inflated the total cost beyond the initial case estimate.