When we launched the “Less Is More” series, it was with the goal of correcting what we see as a prevalent bias in American medicine: that more care (more diagnostic tests, more treatments, more procedures) is better care. As modern medicine has produced some spectacular interventions, including antibiotics for infections, antiretroviral agents for persons with human immunodeficiency virus infection, detailed imaging through computed tomography, and magnetic resonance imaging to obviate the need for diagnostic surgery, it is not surprising that physicians and our patients think that more diagnostic tests and treatments are always better.