Economic Impact of a Precision Nutrition Digital Therapeutic on Employer Health Costs: A Multi-Employer and Multi-Year Claims Analysis

<b>Background:</b> Obesity, gastrointestinal disorders, and mental health conditions are major drivers of employer healthcare expenditures, yet nutrition-focused interventions are infrequently reimbursed by health insurance. Precision nutrition, which integrates genetic, gut microbiome, biometric, and behavioral data to guide personalized dietary and lifestyle changes, may offer a scalable approach to reducing costs associated with diet-responsive conditions. <b>Objectives:</b> To evaluate the impact of a precision nutrition digital therapeutic on employer medical spending for diet-responsive conditions in self-insured U.S. health plans. <b>Methods:</b> We conducted a retrospective cohort study of medical claims from January 2022 to December 2024 across seven U.S. self-insured employers. Employees enrolled in a precision nutrition digital therapeutic (n = 258) were compared with never-enrolled peers (n = 8268). We estimated treatment effects using a two-stage difference-in-differences model with member and calendar-month fixed effects and clustered standard errors, focusing on per-member-per-year (PMPY) employer-paid medical spending overall and for predefined diet-responsive condition categories. PMPY estimates were defined conditional on months with positive employer-paid spending and therefore reflect changes in the intensity of spending among members generating claims rather than unconditional per-capita costs. <b>Results:</b> Enrollment in the precision nutrition digital therapeutic was associated with a -$3012 PMPY reduction in diet-responsive medical spending (<i>p</i> = 0.021) relative to non-enrolled peers on this conditional basis. The largest relative reductions were observed for digestive disorders (-$9240 PMPY; <i>p</i> = 0.029) and obesity (-$4884 PMPY; <i>p</i> = 0.007), with a smaller reduction for anxiety-related conditions (-$1356 PMPY; <i>p</i> = 0.043). Total medical spending decreased by -$4044 PMPY but this change did not reach statistical significance (<i>p</i> = 0.09). <b>Conclusions:</b> In this multi-employer claims analysis, participation in a precision nutrition digital therapeutic was associated with lower employer-paid medical expenditures for diet-responsive conditions, particularly digestive disorders and obesity. These findings suggest that precision nutrition digital therapeutics may represent a scalable strategy for employers to address the economic burden of chronic disease within self-insured health plans by reducing the intensity of medical spending among members.