* OBJECTIVE Our goal was to compare the content of family practice in different countries using databases containing information on reasons for encounter, diagnoses, and interventions that are coded with or can be addressed by the International Classification of Primary Care (ICPC).

* STUDY DESIGN In the Netherlands, Japan, and Poland data were collected identically with an electronic patient record (Transhis). For all face-to-face encounters the reasons for encounter, diagnoses, and interventions were coded according to the ICPC within an episode of care structure; prescriptions were coded with the ICPC drug code. Data were collected for research purposes and cannot be considered representative for family practice in these countries. We derived comparable estimates for the United States using visit data from the National Ambulatory Care Survey (NAMCS), with specific emphasis on the contribution of family physicians. NAMCS data were mapped to the ICPC and the ICPC drag code, and Dutch, Polish, and Japanese data were directly standardized for the 1996 US population. Data on utilization, reasons for encounter, encounters per episode of care, new episodes of care, and prescriptions were compared. We also present World Health Organization and Organisation for Economic Co-operation and Development data on health care delivery, efficiency, expenditure, and health status for each country.

* POPULATION We included the following: from the Netherlands: 10 family physicians, 48.640 patient years, 1995-2000; from Japan: 6 family physicians, 17.082 patient years, 1996-1999; from Poland: 22 family physicians, 11.315 patient years, 1997-1999; and from the United States: NAMCS 1995-97, 30.991 patient years, 91395 visits (26% with a family physician).