Abstract: Systems and methods for identifying health care professionals or physicians having certain prescribed attributes can be employed to identify health care professional or physician influence networks for the purpose of improving the efficiency and effectiveness of a pharmaceutical company's sales force. Such identified physicians can include, for example, influencer physicians, influenced, and high prescribing physicians. The method for identifying such physicians involves the use of a mathematical methodology to analyze surveys to determine the size of a physician population and the influencers therein.