Seventeen medical specialty societies today identified 90 common tests and procedures that may be overused or unnecessary for certain patients based on the evidence, and encouraged physicians and patients to choose their use wisely. Among other treatments, the procedures include non-medically indicated inductions of labor or cesarean deliveries before 39 weeks of pregnancy; stress echocardiography for patients with no symptoms and low risk of coronary disease; CT scans to evaluate minor head injuries in children; and electroencephalography for patients with recurrent headaches. Since last April, 25 medical societies have identified more than 130 tests and procedures to question as part of the Choosing Wisely campaign, initiated by the American Board of Internal Medicine Foundation. For each society's list, visit http://choosingwisely.org. Additional specialty societies are expected to announce lists later this year.