Conflict of Interest Disclosures: Dr Fox reported being board president of the Health Care Cost Institute, which provided the data (having no direct authority or oversight of the data and services provided to researchers who use these data; that work is the exclusive purview of the Health Care Cost Institute staff). Dr Armstrong reported being an employee of CVS Health Corporation and owning stock in the company. Dr Clapp reported being a scientific advisory board member and holding private equity in Delfina Care, receiving payments from the American College of Obstetricians and Gynecologists for editorial services, and receiving grant funding from the Agency for Healthcare Research and Quality and the National Institutes of Health National Heart, Lung, and Blood Institute. No other disclosures were reported.