The public health and economic burden of cancer in the United States are enormous: 1.73 million individuals are projected to be newly diagnosed, and 609,640 to die, in 2018 1 ; and the cost of oncologic care is projected to rise from $125 billion in 2010 to $173 billion by 2020-a 39% increase. 2 As advances in cancer care delivery are made and the pace of discovery of new and better methods for diagnosing, staging, treating, and caring for the rising army of cancer survivors has risen, so too have the complexity of care delivery and the number of different areas of expertise required for optimal care. This rising complexity has increased the danger of care fragmentation, in which each provider picks a corner of a patient's needs to work on in isolation, sometimes seemingly oblivious of the existence of alternatives and a bigger picture. To combat this rampant danger of fragmentation, there has been almost universal advocacy for the multidisciplinary model of cancer care by almost all professional groups involved in oncology care delivery. [3][4][5][6] The multidisciplinary model of care delivery is conceptually alluring. It promises transparency in a complex, opaque world and the potential for multiperspective evaluation of individual patients, so only the best option for the individual patient would be selected within his or her unique set of clinical circumstances and social values, with the promise of better outcomes, whether in terms of the timeliness of care, delivery of evidence-based care, patient satisfaction, survival, or cost effectiveness. What is not to love about this? When described to patients and their caregivers, this model of care delivery seems like a "no-brainer." "Why study this? Is this not already what you routinely do?" 7 The answer, of course, is that many "no brainers" in medicine, upon rigorous evaluation, prove to have outcomes very different from what was expected. Remember the Cardiac Arrhythmia Suppression Trial? 8 In oncology, unfortunately, there are many examples of promising treatments, founded on sound logic and promising early evidence, that have fallen by the wayside after careful study.Despite the near unanimous recommendations of organizations of professional experts and quasiregulatory organizations, a quick look across the land reveals precious little evidence of the routine deployment of multidisciplinary care. This dearth is especially striking within the community-based health care systems in which the majority of patients receive cancer care in the United States. Why is this? Well, there is a dearth of evidence for one-evidence for benefit, evidence for how to properly implement multidisciplinary care, even evidence for such basic things as how to define, identify, and evaluate multidisciplinary care. 9 In this issue of Cancer, Prabhu Das and colleagues summarize their thorough and structured literature review of studies of multidisciplinary treatment planning conducted within the United States and published from 2000 to 2017. 10 Their effort to collate the contempora...