Federal programs such as the National Health Survey Corps (NHSC) are important for ensuring an adequate supply of primary care professionals in underserved areas. However, we know little about how much NHSC clinicians expand patient capacity at the organizations in which they serve.

This article describes a study that examined longitudinal administrative data at more than one thousand qualified health centers in 2013-2016 to determine whether NHSC clinicians increase clinical capacity at these health centers or merely substitute for non-NHSC clinicians.