The value of group consultation in improving the accuracy of radiologic diagnosis was assessed. Abnormalities on 24 films were pointed out to six groups of three radiologists each. They were asked to reach a specific diagnosis for each case. Accuracy was compared in three settingss: (1) without consultation; (2) with consultation leading to a diagnosis by group consensus; and (3) with consultation followed by independent diagnoses. The accuracy of over 75% of the radiologist improved after consultation in either setting. The extent of improvement was inversely related to the initial accuracy level of the individual. When two or three radiologists agreed initially, they were more frequently correct than not. Group discussion followed by individual diagnosis is a practical approach to radiologic consultation.