The Health Passport Project (HPP) is an initiative sponsored by the Western Governors' Association (WGA) and conducted in Bismarck, North Dakota; Cheyenne, Wyoming; and Reno, Nevada. HPP is intended to demonstrate how a secure multipurpose electronic health and food benefits card can facilitate information-sharing and improve administrative efficiency among public and private health care providers, nutrition programs, and Head Start educators while placing individuals firmly in control of the information on the card. This evaluation of the HPP demonstration is intended to provide information that decisionmakers in the three participating states need before the states invest in statewide implementation, and to provide critical information to other states considering implementing HPP or related smart card technology.