Prediabetes and type 2 diabetes have reached epidemic levels and are associated with major morbidity and mortality. The US Preventive Services Task Force (USPSTF) and the American Diabetes Association (ADA) recently recommended lowering the starting age for diabetes screening to 35 years to facilitate earlier detection and treatment.1,2 We estimated the proportion of asymptomatic US adults eligible for screening based on new vs current USPSTF and ADA screening guidelines, overall and among those with prediabetes or undiagnosed diabetes.