Millennials are ditching the 'family doctor' model

Calvin Brown doesn't have a primary care doctor — and the peripatetic 23-year-old doesn't want one. Since his graduation last year from the University of San Diego, Brown has held a series of jobs that have taken him to several California cities. "As a young person in a nomadic state," Brown said, he prefers finding a walk-in clinic on the rare occasions when he's sick.