On a brisk January morning, physician assistant Brett Feldman searched the streets of Los Angeles for patients, knocking on car windows and peering into tents. It was the day after a winter storm had doused the city, and many of the unhoused people Feldman usually treats had moved to find somewhere dry. Feldman leads the street medicine team at the USC Keck School of Medicine, providing primary care to thousands of L.A.’s homeless individuals. Many have chronic conditions, mental health