The existence of a primary care physician shortage, even prior to the ACA, is not universally accepted. A new report by the Institute on Medicine found “no credible evidence” that the nation faces a looming physician shortage in primary care specialties. There is greater consensus about a maldistribution of physicians, in terms of specialty, geography, and practice settings. This new LDI/ Interdisciplinary Nursing Quality Research Initiative (INQRI) research brief reviews the evidence and how the ACA might affect current and future patterns of delivering primary care.