One of the most important issues, when discussing creation of rational health care system, is improving its efficiency. One of the solutions is for example computerisation of the health care, which includes creation of a national medical services register - RUM - that is a system of collecting and processing medical services data. The basic assumptions of launching RUM occurred in the beginning of the 90's. Some of Health Insurance Fund have already implemented RUM. Nowadays the experience gained in the past is being used in works leading to launching the system RUM II. NFZ is responsible for the coordination of program of implementation and has set a "Strategy of using databases by NFZ and the directions of NFZ data system development for the years 2001-2010" as well as "Conception of RUM II generation". Their assumptions and predicted results and benefits will be discussed in this analysis.