Data regarding current services in hospital libraries of the metropolitan Detroit area form the nucleus of this study. The purpose of this study is two-fold: (1) to ascertain what services are given to users of hospital libraries and (2) to determine the value of the inventory as a means for obtaining information on user-services in hospital libraries. The study reveals what user services are available in 42 Detroit area biomedical libraries and which categories of users receive them. It also shows how services vary in type and degree. (MF)