This document discusses contests of expertise between nurses and physicians in primary care settings. It notes that while there are over 180,000 nurse practitioners (NPs), they remain a "hidden population" compared to the 800,000 medical doctors. The document presents findings from an ethnographic study of two primary care teams, one led by a nurse practitioner named Norah and the other by a nurse practitioner named Sara. It finds that Norah practiced with a holistic "whole case" approach, while Sara lacked local expertise. Physicians in the study positioned themselves as outside consultants rather than collaborators. The document concludes that NP expertise goes beyond medical competence by addressing social factors, and that NP-led primary care can provide alternatives to traditional physician